Integrated hybrid power system

Abstract

The invention belongs to the technical field of hybrid power, and particularly relates to an integrated hybrid power system which comprises an engine, a starting motor, a power generation motor, a middle box body and a transition shaft, the middle box body comprises a mounting cavity and a lubricating oil cavity, the lubricating oil cavity is provided with an oil pumping opening connected with a lubricating oil pump, and lubricating oil is conveyed to all oil points through the lubricating oil pump. Return oil of each oil point is communicated with the lubricating oil cavity; the outer circle of the transition shaft is fixed with the inner circle of a rotor of the generator through a first bearing; the transition shaft is fixed with a mounting hole in the front end of the fixed seat; the engine and the power generation motor are fixed to the front side and the rear side of the middle box respectively. The rotating shaft connecting end of the power generation motor is connected with a power turbine output shaft of the engine through a coupling assembly. The engine, the starting motor and the power generation motor can be compactly integrated on the middle box body, unified management of multi-path oil supply and oil return can be achieved through the lubricating oil cavities and the lubricating oil channels in the middle box body, and therefore the overall performance and reliability of the hybrid power system are improved.

Description

Technical Field

[0001] This invention belongs to the field of hybrid power technology, and specifically relates to an integrated hybrid power system. Background Technology

[0002] Existing hybrid power systems typically consist of an engine, a starter generator, and one or more generators. The engine serves as the primary power source, providing propulsion power or mechanical work; the starter generator not only starts the engine but also supplies power to onboard electrical equipment or energy storage devices after the engine is running; the high-speed generator outputs a large amount of electrical energy at high speeds. In traditional structures, the starter generator and high-speed generator are usually mounted at different locations on the engine via gearboxes, accessory housings, or independent brackets. The components are mechanically connected by long shafts, couplings, or gear trains, and are lubricated and cooled by their respective engine housings or oil tanks.

[0003] While this distributed layout enables each component to perform its basic functions, it also brings several problems:

[0004] Firstly, multiple rotating machinery units are distributed in different positions around the engine, occupying a large amount of axial and radial space, resulting in a bulky overall system structure that is not conducive to achieving a compact arrangement in confined spaces such as the casing and engine compartment.

[0005] Secondly, the lubrication and cooling system often has separate oil circuits for each component or simply distributes them within the engine casing, resulting in many oil circuit branches, long pipe lengths, and numerous interfaces, which increases the risk of leakage and assembly complexity, and is also not conducive to unified management of the lubrication of bearings and the cooling of motor windings in each component.

[0006] Third, the power electronic controllers of starter generators and high-speed generators are usually installed in different locations and connected to the motor body through multiple connectors and cables. This not only increases the weight of the wiring harness and the overall volume, but also increases the difficulty of electromagnetic interference, protective sealing, and maintenance.

[0007] As hybrid power systems develop towards higher power density, integration, and higher reliability, the existing loose combination of "engine-starter generator-high-speed generator-distributed controller" is no longer sufficient to meet the comprehensive requirements for compact overall layout, centralized management of lubrication system, efficient motor cooling, and simplified wiring harness.

[0008] Therefore, a new hybrid power system architecture is needed that can integrate the engine, starter generator, and high-speed generator within a limited installation space, and form a coordinated whole with the power controller and lubrication and cooling system. This will improve the structural compactness, simplify the oil circuit and wiring harness layout, and enhance the system's operational reliability and maintenance convenience. Summary of the Invention

[0009] The present invention addresses the aforementioned technical problems by providing an integrated hybrid power system.

[0010] An integrated hybrid power system includes an engine, a starter generator, and a generator motor; the integrated hybrid power system further includes:

[0011] The intermediate housing includes an upper mounting cavity and a lower lubricating oil cavity. The lubricating oil cavity is provided with an oil suction port that connects to the inside and outside. The oil suction port is connected to an external lubricating oil pump. The lubricating oil in the lubricating oil cavity is delivered to the oil consumption points in the engine, the starter generator, and the generator motor through pipelines via the lubricating oil pump. The return oil pipelines of each oil consumption point are respectively connected to the lubricating oil cavity.

[0012] A transition shaft, the front side of which is inserted into the rotor of the generator and the outer circle of which is fixed to the inner circle of the generator rotor by a first bearing;

[0013] The mounting cavity is provided with a fixing seat for fixing. The fixing seat is fixed to the rear side of the inner wall of the mounting cavity. The front end of the fixing seat has a mounting hole that extends to the transition shaft and matches the transition shaft. The transition shaft is fixedly connected through the mounting hole.

[0014] The generator housing is fixed to the inner wall of the mounting cavity;

[0015] The rear side of the engine is fixed to the front side of the intermediate housing. The compressor shaft of the engine is connected to the transmission end cover of the generator through a spur spline meshing via a compressor gear. The power turbine output shaft of the engine and the power turbine output shaft sleeve disposed outside the power turbine output shaft pass through the front side and extend out to the rear side of the transition shaft. The outer circle of the power turbine output shaft sleeve is fixed to the inner circle of the transition shaft through a second bearing.

[0016] The front side of the generator motor is fixed to the rear side of the intermediate housing, and the front side of the generator motor shaft connection end extends into the mounting cavity above the intermediate housing and is connected to the power turbine output shaft through a coupling assembly.

[0017] Optionally, the integrated hybrid power system further includes a resolver assembly, the resolver assembly comprising:

[0018] A resolver adapter plate includes a fixed end flange and a rotating end flange. The fixed end flange is fixedly connected to the front end face of the inner wall of the mounting cavity, and the rotating end flange is fixedly connected to the transmission end cover of the generator. The rotating end flange rotates together with the rotor of the generator through the transmission end cover.

[0019] A rotary transformer, comprising a rotary rotor and a rotary stator arranged opposite to each other, the rotary rotor being fixed on the rotating end flange, the rotary stator being fixed on the fixed end flange, the rotary stator being connected to an external wiring harness, the external wiring harness extending out from the front end of the intermediate housing.

[0020] Optionally, the coupling assembly includes:

[0021] A splined hollow shaft, the front side of which abuts or connects to the output shaft sleeve of the power turbine, and the rear inner circle of the splined hollow shaft has a first internal spline;

[0022] A spline connecting shaft is provided with a first external spline on its front outer circumference. After the spline connecting shaft extends into the rear interior of the spline hollow shaft, the first external spline engages with the first internal spline. A second external spline is provided on the rear outer circumference of the spline connecting shaft, and the second external spline engages with the second internal spline provided at the shaft connection end of the generator motor.

[0023] Optionally, the front side of the splined hollow shaft is provided with a hollow shaft step extending towards the shaft center, and the rear outer surface of the power turbine output shaft sleeve is provided with a platform that mates with the hollow shaft step. The platform extends into the front side of the splined hollow shaft, and the rear end of the power turbine output shaft passes through the hollow shaft step from the front side of the splined hollow shaft and is threaded to a locking nut on the rear side of the hollow shaft step to achieve a fixed connection with the splined hollow shaft. The locking nut abuts the front end face of the splined hollow shaft against the rear end face of the power turbine output shaft sleeve.

[0024] Optionally, the integrated hybrid power system further includes:

[0025] The heat exchanger has a heat exchange pipe connected to the lubricating oil pump. The lubricating oil in the lubricating oil chamber is sent to the heat exchange pipe of the heat exchanger through the lubricating oil pump for heat exchange. After heat exchange, the cooled lubricating oil is sent to the oil-using points in the engine, the generator and the generator motor respectively through the pipe.

[0026] Optionally, the heat exchanger is an air-cooled radiator.

[0027] Optionally, the bottom of the mounting cavity is provided with one or more interconnected main oil return windows, and the oil return from each oil use point is connected to the lubricating oil cavity through the main oil return window.

[0028] Optionally, the mounting cavity is provided with a plurality of built-in drainage grooves or inclined guide surfaces along the direction toward the main return oil window, so that the return oil from each oil point is collected at the main return oil window through the built-in drainage grooves or inclined guide surfaces, and falls back into the lubricating oil cavity through the main return oil window.

[0029] Optionally, the oil supply point inside the starter generator includes a first bearing, there is an annular gap between the outer circle of the starter generator housing and the inner wall of the intermediate box, and the starter generator is provided with a lubricating oil inlet for the first bearing, which is connected to the first bearing.

[0030] The transition shaft is provided with a first bearing lubricating oil inlet corresponding to the axial direction of the first bearing lubricating oil inlet. When the transition shaft is connected to the generator, the first bearing lubricating oil inlet is sealed to the first bearing lubricating oil inlet by a first sealing ring.

[0031] The first bearing oil inlet is connected to the first oil inlet on the intermediate housing via the oil passage on the transition shaft and the oil passage on the fixed seat. The oil pump delivers the oil in the oil chamber to the first oil inlet via pipeline. The oil enters the first bearing for cooling and lubrication via the first oil inlet, the oil passage, the first bearing oil inlet, and the first bearing lubricating oil inlet. The oil overflowing from the first bearing flows downward into the lower space inside the generator under the action of gravity along the bearing seat and the gap in the inner wall of the housing. The lower space inside the generator serves as the oil return area of ​​the generator and is connected to the annular gap. The oil in the oil return area of ​​the generator flows into the mounting cavity through the annular gap under the action of gravity and falls back into the oil chamber through the main oil return window.

[0032] Optionally, the oil application point inside the generator includes the stator winding area of ​​the generator, and there is an annular gap between the outer circle of the generator housing and the inner wall of the intermediate box.

[0033] The mounting base is equipped with an oil mist nozzle, the spray direction of which is directed towards the stator winding area of ​​the generator. The oil mist nozzle is connected to a second lubricating oil inlet on the intermediate housing via a lubricating oil channel on the mounting base. The lubricating oil pump delivers the lubricating oil in the lubricating oil chamber to the second lubricating oil inlet via a pipeline. After passing through the second lubricating oil inlet and the lubricating oil channel in sequence, the lubricating oil is cooled by the oil mist formed by the spray from the oil mist nozzle. During the rotation of the generator rotor, the oil splash further cools the winding and surrounding components. The sprayed and splashed lubricating oil flows into the lower space inside the generator under the action of gravity. The lower space inside the generator serves as the return oil area of ​​the generator and is connected to the annular gap. The lubricating oil in the return oil area of ​​the generator flows into the mounting cavity through the annular gap under the action of gravity and falls back into the lubricating oil chamber through the main return oil window.

[0034] Optionally, the generator motor is sealed to the rear flange face of the intermediate housing via a front flange of the motor, forming a flange chamber on the rear side of the fixed seat, and the flange chamber communicates with the mounting cavity;

[0035] The generator housing has a third lubricating oil inlet at its top and a housing return oil hole on the side of the generator housing near the intermediate housing. The generator housing has an oil collection area at its lower interior. One end of the housing return oil hole communicates with the oil collection area, and the other end opens into the flange cavity. The lubricating oil pump delivers lubricating oil from the lubricating oil cavity to the third lubricating oil inlet via a pipeline. The lubricating oil enters the generator housing through the third lubricating oil inlet to cool and lubricate the oil-using points within the generator. Under gravity, the lubricating oil flows into the oil collection area and is discharged into the flange cavity through the housing return oil hole. Under gravity, the lubricating oil flows through the flange cavity into the mounting cavity and falls back into the lubricating oil cavity through the main return oil window.

[0036] Optionally, the oil collection area is located on the side close to the intermediate housing, and the inside of the generator housing is provided with an internal drain groove or return oil channel from below the oil consumption point along the direction of the oil collection area. The bottom surface of the internal drain groove or return oil channel is inclined towards the intermediate housing relative to the axial direction of the generator.

[0037] Optionally, the oil return hole of the housing is located at the lower half of the front end of the housing of the generator motor.

[0038] Optionally, the oil supply point inside the generator includes a second bearing, and there is an annular gap between the outer circle of the generator housing and the inner wall of the intermediate box.

[0039] The generator motor's shaft connection end has an internal oil passage that connects to some of the generator motor's oil supply points. The coupling assembly has an internal oil passage, and the rear side of the power turbine output shaft has an internal oil passage. The oil passage at the shaft connection end connects to the oil passage of the power turbine output shaft via the oil passage of the coupling assembly. The power turbine output shaft and the power turbine output shaft sleeve are provided with several radially connected oil outlet holes, which are respectively connected to the oil passage of the power turbine output shaft and the second bearing.

[0040] The generator housing is provided with a third lubricating oil inlet. The lubricating oil pump delivers the lubricating oil in the lubricating oil chamber to the third lubricating oil inlet via pipeline. The lubricating oil enters the generator housing through the third lubricating oil inlet to cool and lubricate the oil-using points inside the generator. Part of the lubricating oil enters the second bearing through the lubricating oil channel in sequence through the lubricating oil channel of the shaft connection end, the lubricating oil channel of the coupling assembly, the lubricating oil channel of the power turbine output shaft, and several radial oil outlet holes for cooling and lubrication. The lubricating oil overflowing from the second bearing flows downward into the lower space inside the generator under the action of gravity along the bearing seat of the second bearing and the gap in the inner wall of the housing. The lower space inside the generator serves as the return oil area of ​​the generator and connects to the annular gap. The lubricating oil in the return oil area of ​​the generator flows into the mounting cavity under the action of gravity through the annular gap and falls back into the lubricating oil chamber through the main return oil window.

[0041] Optionally, the engine is sealed to the front flange of the intermediate housing via a connecting flange, forming a sealed chamber at the rear of the engine and at the front of the intermediate housing;

[0042] The connecting flange is provided with a first oil passage. One end of the first oil passage is connected to the engine's own lubrication pipeline system for supplying oil to the lubrication parts inside the engine. The other end of the first oil passage is connected to a fourth oil inlet on the intermediate housing via an oil passage inside the intermediate housing. The oil pump delivers the oil in the oil chamber to the fourth oil inlet via a pipeline. The oil then enters the engine's own lubrication pipeline system via the fourth oil inlet, the oil passage, and the first oil passage of the connecting flange. After cooling and lubricating the lubrication parts inside the engine, the oil is returned to the oil chamber via a return port on the engine.

[0043] The engine is provided with a second lubricating oil passage. One end of the second lubricating oil passage is connected to the rear bearing for supporting the compressor shaft through the lubricating oil passage in the engine. The other end of the second lubricating oil passage is connected to the fourth lubricating oil inlet provided on the intermediate housing through the lubricating oil passage in the intermediate housing. The lubricating oil pump delivers the lubricating oil in the lubricating oil chamber to the fourth lubricating oil inlet through the pipeline. The lubricating oil enters the rear bearing for cooling and lubrication in sequence through the fourth lubricating oil inlet, the lubricating oil passage, and the second lubricating oil passage. The lubricating oil overflowing from the rear bearing flows along a preset drainage path inside the engine under the action of gravity to the low position area of ​​the casing near the intermediate housing. It is discharged to the mounting cavity of the intermediate housing through the oil return opening provided in the low position area of ​​the casing and falls back into the lubricating oil chamber through the main oil return window.

[0044] Optionally, the generator is integrated into a motor and controller integrated system, which includes:

[0045] The controller housing is provided, and the generator is mounted on the controller housing. The three-phase winding terminals of the generator are located at the rear of the generator.

[0046] A motor controller assembly is disposed within a controller housing and located below the generator motor. A mounting area for accommodating connecting conductors is provided between the rear of the motor controller assembly and the controller housing. The motor controller assembly includes a controller base plate and a power module assembly. The power module assembly includes a power module disposed on the controller base plate and several connecting conductors. Several AC terminals of the power module are arranged side-by-side in the mounting area. Each AC terminal is electrically connected to a connecting conductor. Each connecting conductor bends upwards in the mounting area and extends above the mounting area, respectively electrically connecting to the corresponding three-phase winding terminals. The connecting conductors are used to transmit three-phase AC current between the power module and the generator motor.

[0047] Optionally, the connecting conductive bus is provided with a support structure, and the connecting conductive bus is fixed to the controller housing or the motor flange of the generator motor through the support structure.

[0048] Optionally, the support structure is an insulating bracket.

[0049] Optionally, the controller housing includes a controller base plate, a front cover plate, a rear cover plate, a first side plate and a second side plate arranged axially, and a top cover. The controller base plate, the front cover plate, the rear cover plate, the first side plate, the second side plate, and the top cover plate form the controller housing. The front cover plate has a downwardly recessed opening, and the opening of the front cover plate is detachably fixed to the lower edge of the flange provided on the front end face of the generator motor. The top cover plate and the front cover plate have a preset distance, so that the front part of the top of the controller housing is an open structure with an opening. The open structure accommodates the generator motor and allows the generator motor to be exposed outside the controller housing from the front side to the front edge of the top cover plate. The top cover plate is an arc-shaped cover with an upward convex center. The top cover plate is located on the rear part of the generator motor and above the mounting area. The front end of the top cover plate is detachably fixed to the motor housing of the generator motor, and the rear end of the top cover plate is detachably fixed to the rear cover plate.

[0050] Optionally, the outer sides of the first side plate and the second side plate have reserved space for integrating other devices.

[0051] Optionally, the bottom of the controller base plate is provided with heat dissipation fins.

[0052] Optionally, a cooling fan is provided on the side of the heat dissipation fins.

[0053] Optionally, the controller housing has reserved spaces for integrating other devices arranged along the axial direction of the generator motor. These reserved spaces are located above the motor controller assembly and on the left and right sides of the generator motor.

[0054] Optionally, the reserved space integrates at least one of the following devices: a fuel pump controller, a lubricating oil pump controller, a starter / generator controller, and an engine controller.

[0055] Optionally, the front end face of the generator is provided with a flange, and the middle of the front end of the generator is provided with an internal spline for transmission. The flange and the internal spline are used to connect the generator and the engine.

[0056] Optionally, the oil pump controller of the oil pump is disposed in a reserved space on the controller housing.

[0057] Optionally, the power module assembly further includes a phase current sensor for detecting phase current, the phase current sensor being disposed on the AC terminal of the power module and the connection path of the connecting busbar.

[0058] Optionally, the length direction of the controller base plate is a left-right direction that is horizontally perpendicular to the axis of the generator motor, and the power module assembly is disposed on the controller base plate, with the length direction of the power module assembly being a left-right direction;

[0059] The motor controller assembly also includes a DC bus capacitor assembly, which is disposed on the controller base plate in front of the power module assembly, and the length direction of the DC bus capacitor assembly is the left-right direction;

[0060] The generator motor has a front-to-back axis. The controller housing has reserved spaces for integrating other devices arranged along the generator motor axis. These reserved spaces are located above the motor controller assembly and on the left and right sides of the generator motor.

[0061] Optionally, the length direction of the controller base plate is a left-right direction that is horizontally perpendicular to the axis of the generator motor; the power module assembly includes a plurality of power modules, each of which is a left-right direction, and the plurality of power modules are arranged side by side on the controller base plate along the left-right direction.

[0062] The motor controller assembly also includes a DC bus capacitor assembly, which includes a plurality of DC capacitors and interconnecting busbars electrically connected to each of the DC capacitors. The length direction of the DC capacitors is the left-right direction, and the plurality of DC capacitors are arranged side by side along the left-right direction on the controller base plate in front of the plurality of power modules.

[0063] The interconnecting busbar is located behind the DC capacitor. The interconnecting busbar has several connection positions on the side facing the power module assembly. The DC terminal of the power module is located in front of the power module. The positive DC terminal and the negative DC terminal of the DC terminal are electrically connected to the corresponding connection positions of the interconnecting busbar through two DC busbars, one positive and one negative.

[0064] Optionally, the controller base plate adopts a U-shaped structure, and a DC power interface is provided on the side wall surface of the controller base plate. The DC power interface is connected to another connection position of the interconnecting busbar.

[0065] Optionally, the DC bus capacitor assembly further includes a bus current sensor for detecting the DC bus current, the bus current sensor being disposed on one of the DC busbars or the interconnecting busbars.

[0066] Optionally, the generator motor has a front-to-back axis, and the controller housing has reserved spaces for integrating other devices arranged along the generator motor axis. These reserved spaces are located above the motor controller assembly and on the left and right sides of the generator motor.

[0067] Optionally, the motor controller assembly further includes a control board assembly, which includes a control board for driving the power modules and an outer shielding plate disposed on the outside of the control board. The control board is connected to several of the power modules respectively, and the control board assembly is disposed above or to the side of several of the power modules, or above or to the side of several of the DC capacitors.

[0068] Optionally, the controller base plate adopts a U-shaped structure, and a controller power supply interface is provided on the side wall surface of the controller base plate. The controller power supply interface is used to supply power to the control board assembly and can also serve as a debugging and calibration interface. Each pin of the controller power supply interface is electrically connected to the control board through a wire harness.

[0069] Optionally, the motor controller assembly further includes a shielding partition, and the control board assembly is disposed above the plurality of power modules, with the shielding partition disposed above the control board assembly.

[0070] Optionally, the length direction of the controller base plate is a left-right direction that is horizontally perpendicular to the axis of the generator motor;

[0071] The power module assembly also includes a cold plate, which has a liquid cooling channel inside. The length direction of the cold plate is left-right. The cold plate is mounted on the controller base plate, and the power module is mounted on the cold plate. The length direction of the power module is left-right.

[0072] When the liquid cooling medium flows through the liquid cooling channel inside the cold plate, the liquid cooling medium exchanges heat with the power module to cool the power module.

[0073] Optionally, the liquid cooling medium is fuel oil.

[0074] Optionally, the generator motor housing is provided with a fuel cooling channel, and the controller base plate has a fuel inlet and a fuel outlet on its side wall. The fuel inlet and the fuel outlet are respectively connected to the liquid cooling channel inlet and liquid cooling channel outlet of the cold plate. The fuel inlet is connected to a fuel pump via a pipeline, the fuel outlet is connected to the fuel cooling channel inlet of the generator housing via a pipeline, and the fuel cooling channel outlet of the generator housing is connected to the fuel pump via a pipeline. The fuel pump delivers fuel through the pipeline and the fuel inlet into the liquid cooling channel of the cold plate to cool the power module. After cooling the generator motor, the fuel is then delivered through the pipeline into the fuel cooling channel of the generator housing to cool the generator motor. Finally, the fuel is delivered from the fuel cooling channel to the engine for combustion via the fuel pump.

[0075] Optionally, the fuel pump controller of the fuel pump is disposed in a reserved space on the controller housing.

[0076] Beneficial effects: The present invention has at least one or more of the following advantages:

[0077] 1. This invention, through the intermediate housing with integrated lubricating oil chamber, enables the engine, starter generator, and generator motor to be compactly integrated on the same intermediate housing. Furthermore, the lubricating oil chamber and lubricating oil channels inside the intermediate housing enable unified management of multiple oil supply and return paths, thereby improving the overall performance and reliability of the hybrid power system.

[0078] 2. This invention, by adding a resolver assembly between the end face of the intermediate housing and the front cover of the generator, can acquire the speed and / or angle signals of the generator during bench testing or operation. In specific implementation, the fixed end of the resolver adapter plate is fixedly connected to the intermediate housing, the rotating end of the resolver adapter plate is connected to the transmission end cover of the generator, and the stator and rotor of the resolver are arranged on the resolver adapter plate, thereby achieving the arrangement and coaxial installation of the resolver without changing the main structure of the generator.

[0079] 3. The compressor shaft of the engine of the present invention is connected to the transmission end cover of the generator through a spur spline meshing via the compressor gear, thereby realizing torque transmission from the generator to the engine; the power turbine output shaft of the engine of the present invention is connected to the shaft connection end of the generator through a coupling assembly, thereby realizing torque transmission from the engine to the generator.

[0080] 4. The intermediate housing of this invention is a hollow housing. The lower oil chamber of the intermediate housing is used to store lubricating oil. The oil chamber is equipped with an oil suction port, which is connected to the suction port of an external oil pump. The lubricating oil is drawn out from this port by the oil pump and delivered to various oil-using points such as the engine bearing, generator bearing, starter motor bearing, and front and rear engine bearings through external pipelines. The upper mounting cavity of the intermediate housing is used to install the starter motor and the flange chamber opposite the front end of the generator motor. The oil return holes of both motor housings directly discharge oil into this space. The entire intermediate housing integrates lubricating oil storage, can be used for support installation, and facilitates oil return. It can make reasonable use of space, facilitate connection with the engine and generator motor, and the oil storage position is conducive to oil return from the generator motor and engine. The space is more compact, the oil circuit is shorter, and it is more conducive to integrated design.

[0081] 5. To facilitate oil return, the present invention provides several built-in drainage grooves or inclined guide surfaces in the bottom plate area of ​​the upper motor mounting cavity along the direction towards the main oil return window, so that the oil return from the two motors is preferentially collected near the main oil return window, and then falls back into the lubricating oil cavity through the window, avoiding the formation of oil stagnation dead zones in the upper space.

[0082] 6. This invention integrates a motor controller assembly and a generator motor on the controller housing. The generator motor is fixed on top, and the motor controller assembly is installed below the generator motor, forming a vertically stacked integrated structure. The AC terminals of the power module in the motor controller assembly are directly and rigidly connected to the three-phase winding terminals of the generator motor using connecting busbars. There are no longer any connecting plugs or flexible cables or intermediate terminals between them, which has the following significant advantages:

[0083] (1) The three-phase power circuit is extremely short and the stray inductance is small: the vertical connecting conductor is almost a direct "terminal to terminal" connection, the loop is extremely small, which is conducive to suppressing voltage spikes and oscillations under SiC high-frequency switching and is EMC friendly;

[0084] (2) Reduce high-current connectors and cables: Eliminate aviation connectors and long cables, reduce contact resistance and heat generation, and reduce contact failure points in vibration environment; reduce the resistance loss that may be generated in intermediate connection links, so that the power transmission efficiency is significantly improved, thereby improving the overall working efficiency of the motor. Under the same working conditions, it can output stronger power and meet more high-load and high-performance working needs.

[0085] (3) Highly integrated structure: The whole machine has changed from "motor + cable + controller" to "motor + controller vertical integrated module", which is convenient to be arranged as a standardized unit around the engine, making the entire electrical connection path clearer and more intuitive, greatly reducing the probability of failure caused by complex connection, and improving the stability and reliability of system operation;

[0086] (4) Maintenance and upkeep bring great convenience: When maintenance personnel conduct daily inspections and troubleshooting, they can locate the problem more quickly and accurately without having to search for the fault point among a large number of complicated cables and connectors. This greatly shortens the maintenance time, reduces maintenance costs, improves the maintainability of the equipment, and provides a strong guarantee for the long-term stable operation of the equipment.

[0087] 7. In this invention, inside the controller housing, several power modules and DC capacitors of the motor controller assembly are arranged along the length of the controller base plate, that is, in a left-right direction that is horizontally perpendicular to the generator motor axis. The controller base plate is located below the generator motor, so that the entire motor controller assembly is located in the central area below the generator motor, which has the following significant advantages:

[0088] (1) Small longitudinal dimensions, compact in the middle, and empty on both sides: The power module and DC capacitor are arranged side by side in the left and right directions, and occupy very little space in the front and back directions. This makes the "thickness" of the motor controller assembly concentrated directly below the motor, and the upper left and right sides are naturally left empty as reserved space, which can be used to arrange other ECUs such as engine controller, starter / generator controller, etc.

[0089] (2) Provide a neat “landing edge” for connecting the conductive busbar: The three-phase output installation area is concentrated on the side near the motor. This edge is exactly the “landing point” of the connecting conductive busbar hanging down from the motor above. The connecting conductive busbar can be arranged in sequence in a plane and neatly connected to the three-phase output end of the power module.

[0090] (3) Convenient modular design and assembly: The power module, DC capacitor and control board are all arranged around the same controller base plate. The motor controller assembly can be pre-installed as an independent module and then connected to the generator motor assembly above.

[0091] 8. In the motor controller assembly of the present invention, the DC capacitor and the power module are arranged front and rear, and are directly electrically connected through interconnecting busbars. This design offers advantages such as low DC bus inductance, compact loop, short path, and small area, which helps reduce bus peak voltage and losses. Furthermore, the power module is located at the rear, with a mounting area behind it. The AC terminals of the power module are uniformly arranged in this mounting area and then connected to the connecting busbars, providing a unified "external interface" for the power module. The internal wiring of the motor controller assembly is neat, and the external interface is clear, facilitating connection with the generator motor above.

[0092] 9. This invention integrates a cold plate into the motor controller assembly. The power module assembly is uniformly mounted on the cold plate with a liquid cooling channel. The cold plate is fixed to the controller base plate and bears mechanical loads and vibrations together with the base plate. A liquid cooling medium, preferably an existing working fluid in a hybrid power system (such as fuel), is circulated inside the cold plate. The cold plate, controller base plate, and connecting busbar form a mutually supporting integrated frame, which has the following significant advantages:

[0093] (1) Reliable heat dissipation under high power density: The power module (SiC module) generates concentrated heat under high switching frequency and high power conditions. The junction temperature can be effectively controlled by cold plate liquid cooling, thereby improving power density and lifespan;

[0094] (2) The system is simple by using existing media: fuel oil (or the working medium already in the system) is used as the cooling medium, eliminating the need to set up a new cooling circuit, reducing system complexity and additional mass;

[0095] (3) The integrated thermo-mechanical-electric structure improves vibration resistance and reliability: The cold plate itself is a rigid component, which together with the controller base plate, the connecting busbar, and the motor housing form a closed mechanical circuit. The transmission path of vibration from the engine, motor housing, connecting busbar, cold plate to the controller base plate is clear. Through the integrated structural design, relative displacement can be controlled, reducing electrical connection fatigue and mechanical damage.

[0096] Furthermore, the cold plate is not merely a standalone "heat dissipation component," but also a "load-bearing platform":

[0097] (1) The lower end of the connecting busbar is fixed to the AC terminal of the power module. The power module is mounted on the cold plate, and the cold plate is mounted on the controller base plate. The relative position of the terminals is stable during thermal expansion and contraction and vibration through the rigid support of the cold plate and the controller base plate.

[0098] (2) The length direction of the power module assembly and the length direction of the cold plate are both arranged in a direction that is horizontal and perpendicular to the axis of the generator motor. The power modules are concentrated near the cold plate, which is conducive to the efficient operation of the cold plate.

[0099] (3) The compact front-to-back arrangement of the DC bus capacitor assembly and power module assembly reduces the need for dispersed arrangement of power devices, making "centralized cooling of cold plate + overall support" possible.

[0100] 10. The present invention provides a support structure on the connecting conductive busbar for positioning support, so as to improve the mechanical strength under vibration environment and ensure the electrical clearance between phases and to ground. Attached Figure Description

[0101] Figure 1 This is a schematic diagram of one structure of the present invention;

[0102] Figure 2 This is another structural schematic diagram of the present invention;

[0103] Figure 3 for Figure 1 An exploded view;

[0104] Figure 4 for Figure 1 A sectional view;

[0105] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0106] Figure 6 This is a partial structural diagram of the intermediate housing of the present invention, in which the mounting cavity is partially cut to show the transition shaft and the lubricating oil channel inside the fixing seat.

[0107] Figure 7 This is an internal sectional view of the integrated components inside the intermediate box of the present invention;

[0108] Figure 8 This is a schematic diagram of a structure between the compressor gear and the transmission end cover of the present invention;

[0109] Figure 9 This is an exploded sectional view of the coupling assembly of the present invention;

[0110] Figure 10 This is a diagram showing the connection relationship between the intermediate housing and the generator motor of this invention;

[0111] Figure 11 This is a diagram showing the connection relationship between the intermediate housing and the engine of the present invention;

[0112] Figure 12 This is a schematic diagram of a lubricating oil path according to the present invention;

[0113] Figure 13 This is a schematic diagram of a motor and controller integrated system according to the present invention;

[0114] Figure 14 for Figure 13 Another perspective illustration;

[0115] Figure 15 for Figure 13 Partial exploded view;

[0116] Figure 16 This is a partial internal schematic diagram of the controller housing of the present invention;

[0117] Figure 17 for Figure 16 Another angle of the diagram;

[0118] Figure 18 This is a diagram showing the positional relationship between the motor controller assembly and the controller base plate of the present invention;

[0119] Figure 19 for Figure 18 Exploded view;

[0120] Figure 20 for Figure 18 Partial structural diagram;

[0121] Figure 21 This is a schematic diagram of a fuel line of the present invention;

[0122] Figure 22 This is a schematic diagram of the fuel system of the present invention;

[0123] Figure 23 This is a schematic diagram of the controller housing of the present invention, excluding the controller base plate;

[0124] Figure 24 This is a simulation diagram of the cold plate of the present invention being cooled by fuel oil;

[0125] Figures 25A to 25C This is a simulation diagram of the generator motor of the present invention using fuel cooling. Detailed Implementation

[0126] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0127] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0128] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0129] In the following description, in order to clearly demonstrate the structure and operation of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0130] In the following description, the rotor axis of the generator, the power turbine output shaft axis of the engine, or the rotor axis of the generator motor is defined as the front-to-back direction, that is... Figure 1 The X-axis direction is defined as follows: the end of the middle housing closer to the engine is the front, and the end of the middle housing closer to the generator is the rear. The direction perpendicular to the horizontal direction of the X-axis is defined as the left and right direction. Figure 1 In the Y-axis direction, where, Figure 1 The arrow pointing to the left on the Y-axis points to the right; directions perpendicular to the front-back and left-right directions are defined as up and down. Figure 1 The Z-axis direction in the equation.

[0131] Reference Figures 1 to 12 This invention provides an integrated hybrid power system, which includes an engine 10, a starter generator 20, a generator motor 30, an intermediate housing 40, and a transition shaft 50.

[0132] Reference Figure 1 , Figures 5 to 7The intermediate housing 40 is hollow and divided into two parts: an upper mounting cavity 41 and a lower lubricating oil cavity 42. The lubricating oil cavity 42 is used to hold lubricating oil and is provided with an oil extraction port 421 that connects to the inside and outside. The oil extraction port 421 is connected to an external lubricating oil pump 61. The lubricating oil in the lubricating oil cavity 42 is sent to various oil-using points in the engine 10, starter generator 20, and generator motor 30 through pipelines to exchange heat and cool down these points. The return oil pipelines of each oil-using point are connected to the lubricating oil cavity 42 to collect the lubricating oil that has been heated by heat exchange and return it to the lubricating oil cavity 42.

[0133] Reference Figure 6 and Figure 7 The housing 22 of the generator 20 is fixed to the inner wall of the mounting cavity of the intermediate housing 40. The stator winding 23 of the generator 20 is fixed inside the housing 22, and the rotor 21 is located radially inside the stator winding 23 and is coaxially arranged with the stator winding 23.

[0134] The front side of the transition shaft 50 passes through the rotor 21 of the generator 20. A fixing seat 43 for fixation is provided inside the mounting cavity 41. The fixing seat 43 is fixed to the rear side of the inner wall of the mounting cavity 41, and its front end has a mounting hole 43a extending to and matching the transition shaft 50, thus fixing the transition shaft 50 in place. Specifically, the fixing seat 43 is a circular fixing plate, which is fixed to the rear wall of the mounting cavity inside the mounting cavity 41. A connecting hole 43a, which mates with the transition shaft 50, is provided through the fixing plate. This connecting hole 43a extends axially into the inner side of the mounting cavity and is fixed to the transition shaft 50 by screws or other means. The fixing seat 43 supports and positions the transition shaft 50, allowing it to be arranged axially and remain fixed relative to the intermediate housing 40.

[0135] Alternatively, the housing 22 can also be fixed to the mounting base 43 by means of screws or other methods.

[0136] Preferably, the fixing seat 43 is integrally formed with the intermediate box 40 and is integrated into the rear side of the inner wall of the mounting cavity 41. Some reinforcing ribs 43c can be provided on the outer side of the fixing seat 43.

[0137] The rotor 21 is rotatably supported relative to the transition shaft 50 by a first bearing 51 arranged along the axial direction. Specifically, the outer circle of the first bearing 51 is tightly fitted (e.g., interference fit) with the bearing mounting part of the rotor 21, so that the first bearing 51 rotates synchronously with the rotor 21; the inner hole of the first bearing 51 is clearance fit or transition fit with the transition shaft 50, so as to achieve the rotational support of the rotor 21 relative to the transition shaft 50 while ensuring the concentricity of the assembly.

[0138] In one embodiment, the rotor 21 is provided with two first bearings 51 spaced apart along the axial direction to improve the support stability and coaxiality retention of the rotor 21. During assembly, the concentricity of the transition shaft 50 and the rotor 21 can be first corrected using a guide tool, and then the first bearings 51 are installed into the bearing mounting part of the rotor 21 to complete the rotational support assembly of the rotor 21 relative to the transition shaft 50. It should be understood that the transition shaft 50 is fixed by the fixed seat 43 and the intermediate housing 40, and the first bearings 51 are used to realize the rotational support of the rotor 21 relative to the transition shaft 50.

[0139] Thus, the generator 20 is fixed inside the intermediate housing 40 by its housing 22, transition shaft 50 and first bearing 51.

[0140] The engine 10 is located on the front side of the intermediate housing 40, and the rear side of the engine 10 is fixed to the front side of the intermediate housing 40.

[0141] The engine includes an exhaust assembly, compressor, diffuser, guide vanes, combustion chamber, gas turbine, power turbine, and intake manifold. The gas turbine and compressor are rotatably connected via a shaft, and the power turbine output shaft is connected to the generator via a coupling assembly. During engine operation, the compressor compresses air, which is then further compressed in the diffuser. The diffuser passes the further compressed gas to the guide vanes, which in turn pass it into the combustion chamber. The gas mixes with fuel and ignites, forming high-temperature, high-pressure combustion gas. This high-temperature, high-pressure gas generated by the rotating gas turbine drives the power turbine output shaft to rotate. The power turbine output shaft transmits torque to the generator rotor via the coupling assembly, enabling the engine to drive or start the generator.

[0142] The generator 20 is used to drive the compressor when the engine 10 is initially running. (See reference...) Figure 5 and Figure 8 The compressor shaft 10a of the engine 10 is connected to the inner spur gear 24 of the starter generator 20 via a spur spline meshing of the outer spur gear 11 and the inner spur gear 24. The drive end cover 24 of the starter generator 20 is rotatably connected to the rotor 21 of the starter generator 20. Therefore, when the rotor 21 of the starter generator 20 rotates, the compressor shaft of the engine 10 is driven to rotate via the compressor gear 11 through the drive end cover 24. In a specific implementation, the compressor gear 11 is provided with an outer spur spline, and the inner surface of the drive end cover 24 is provided with an inner spur spline; the two are connected by the meshing of the outer and inner spur splines to achieve torque transmission.

[0143] Reference Figure 5 The compressor shaft 10a of the engine 10 is rotatably supported in the engine casing by a pair of front and rear bearings. Figure 5The image shows the rear bearing 10b. Specifically, the engine casing is provided with a bearing housing coaxial with the compressor shaft 10a. The outer ring of the rear bearing 10b is mounted and confined within the bearing housing, and the inner ring of the rear bearing 10b is mounted and confined on the corresponding shaft segment of the compressor shaft 10a, thereby enabling the compressor shaft 10a to rotate stably relative to the engine casing and transmitting the load generated by the compressor shaft 10a to the engine casing. The front bearing is similarly provided.

[0144] Reference Figure 5 and Figure 7 The power turbine output shaft 12 of the engine 10 passes through and extends out of the compressor shaft 10a, and there is no torque transmission connection or axial limiting relationship between the power turbine output shaft 12 and the compressor shaft 10a. The part of the power turbine output shaft 12 extending out of the compressor shaft 10a is fitted with a power turbine output shaft sleeve 13. This part and the power turbine output shaft sleeve 13 pass through the front side of the transition shaft 50 and extend out of the rear side of the transition shaft 50 (specifically, when the transition shaft is installed in the mounting hole 43a, the power turbine output shaft sleeve 13 also passes through the mounting hole 43a). The outer circle of the power turbine output shaft sleeve 13 is rotatably supported on the inner hole (inner circle) of the transition shaft 50 by the second bearing 52, so that the power turbine output shaft sleeve 13 is supported and positioned in the intermediate housing 40. When the power turbine output shaft 12 and the power turbine output shaft sleeve 13 rotate synchronously, the transition shaft 50 remains relatively stationary. In specific implementation, two bearing seats can be provided along the axial direction of the transition shaft 50, and two second bearings 52 can be installed respectively. The second bearings 52 are preferably pedestal bearings.

[0145] In addition, the power turbine output shaft sleeve 13 can be connected to the power turbine output shaft 12 via a spur spline; specifically, the inner surface of the power turbine output shaft sleeve 13 is provided with an internal spur spline, and the outer surface of the power turbine output shaft 12 is provided with an external spur spline, and the two achieve torque transmission through the meshing of the internal and external spur splines.

[0146] The generator motor 30 is located at the rear of the intermediate housing 40, and the front of the generator motor 30 is fixed to the rear of the intermediate housing 40.

[0147] Reference Figure 5 , Figure 7 and Figure 9 The generator motor 30 has a shaft connection end 31, the front of which extends into the mounting cavity 41 above the intermediate housing 40 and is connected to the power turbine output shaft 12 via a coupling assembly 70. The power turbine output shaft 12 of the engine 10 is connected to the shaft connection end 31 of the generator motor 30 via the coupling assembly 70. When the power turbine output shaft 12 rotates, it drives the shaft connection end 31 of the generator motor 30 to rotate synchronously, thereby driving the rotor of the generator motor 30 to rotate and generate electricity.

[0148] Among them, the shaft connection end 31 of the generator motor 30 is, for example, an internal spline of the motor connected to the rotor of the generator motor.

[0149] In one embodiment, the integrated hybrid power system further includes a resolver assembly, which includes a resolver adapter 44 and a resolver transformer.

[0150] The resolver adapter plate 44 includes a fixed end flange and a rotating end flange. The fixed end flange is fixedly connected to the front end face of the inner wall of the mounting cavity 41, and the rotating end flange is fixedly connected to the transmission end cover 24 of the generator 20. The rotating end flange rotates together with the rotor 21 of the generator 20 through the transmission end cover 24. The resolver includes a resolver rotor and a resolver stator arranged opposite to each other. The resolver rotor is fixed on the rotating end flange, and the resolver stator is fixed on the fixed end flange. The resolver stator is connected to an external wiring harness, which extends out from the front end of the intermediate housing 40.

[0151] The rotational speed and / or angle signal of the generator 20 can be obtained during bench testing or operation by means of the resolver assembly. A resolver adapter plate 44 is added between the front end face of the inner wall of the mounting cavity 41 and the transmission end cover of the generator 20, and the resolver stator and resolver rotor of the resolver are arranged on it. Thus, the arrangement and coaxial installation of the resolver can be achieved without changing the main structure of the generator 20.

[0152] In one embodiment, reference is made to Figure 5 , Figure 7 and Figure 9 The coupling assembly 70 includes a splined hollow shaft 71 and a splined connecting shaft 72.

[0153] The front side of the splined hollow shaft 71 abuts or connects to the power turbine output shaft sleeve 13, and the rear inner circle of the splined hollow shaft 71 has a first inner spline 711. The front outer circle of the splined connecting shaft 72 is provided with a first outer spline 721. After the splined connecting shaft 72 extends into the rear interior of the splined hollow shaft 71, the first outer spline 721 engages with the first inner spline 711. The rear outer circle of the splined connecting shaft 72 is provided with a second outer spline 722, and the second outer spline 722 engages with the second inner spline provided on the shaft connecting end 31 of the generator motor 30.

[0154] In specific implementation, a hollow shaft step 712 extending towards the shaft center is provided inside the front side of the spline hollow shaft 71, and a platform that mates with the hollow shaft step 712 is provided on the rear outer surface of the power turbine output shaft sleeve 13. The rear end of the power turbine output shaft 12 passes through the hollow shaft step 712 from the front side of the spline hollow shaft 71 and is threaded to the locking nut 73 on the rear side of the hollow shaft step 712 to achieve a fixed connection with the spline hollow shaft 71. The front end face of the spline hollow shaft 71 is abutted against the rear end face of the power turbine output shaft sleeve 13 by the locking nut 73.

[0155] In this embodiment, when the power turbine output shaft 12 rotates, it drives the splined hollow shaft 71 to rotate, which in turn drives the splined connecting shaft 72 to rotate. The splined connecting shaft 72 then drives the rotating shaft connecting end 31 of the generator motor 30 to rotate. This embodiment achieves coaxial connection between the power turbine output shaft 12 of the engine 10 and the rotating shaft connecting end 31 of the generator motor 30, as well as torque transmission, through the aforementioned splined hollow shaft 71, splined connecting shaft 72, and locking nut 73.

[0156] In one embodiment, reference is made to Figures 1 to 4 The integrated hybrid power system also includes a heat exchanger. The heat exchanger's heat exchange pipes are connected to the lubricating oil pump 61. The lubricating oil in the lubricating oil chamber 42 is sent through the pipeline to the heat exchanger's heat exchange pipes for heat exchange. After heat exchange, the cooled lubricating oil is sent through the pipeline to the oil-using points in the engine 10, the starter generator 20, and the generator motor 30, respectively.

[0157] In one embodiment, the heat exchanger employs an air-cooled radiator.

[0158] In one embodiment, reference is made to Figure 6 and Figure 7 The bottom of the mounting cavity 41 is provided with one or more main oil return windows that are connected vertically, and the oil return from each oil use point is connected to the lubricating oil cavity 42 through the main oil return window.

[0159] Preferably, the bottom of the mounting cavity 41 and the top of the lubricating oil cavity 42 are mutually open, and there is one total oil return window. That is to say, the interior of the intermediate box 40 is a box chamber that integrates installation and oil storage. This box chamber is roughly divided into the upper mounting cavity 41 and the lower lubricating oil cavity 42.

[0160] In specific implementation, several built-in drainage grooves or inclined guide surfaces can be provided in the installation cavity 41 along the direction towards the main oil return window, so that the oil return from some oil use points can return to the main oil return window through the built-in drainage grooves or inclined guide surfaces, and fall back to the lubricating oil cavity 42 through the main oil return window, thus avoiding the oil stagnation dead zone in the upper installation cavity 41.

[0161] In this embodiment, the lubricating oil returning to the main return window falls back into the lower lubricating oil chamber 42 through the main return window, and is then drawn out again by the lubricating oil pump 61, realizing a gravity-driven closed-loop lubrication circuit with the intermediate housing 40 as the oil storage center and shared by multiple devices (such as the starter generator and the output motor). The lubricating oil pump 61 maintains the oil level and pressure conditions in the lubricating oil chamber 42, ensuring that there is always a sufficient liquid level difference and pressure difference between the upper mounting cavity 41 and the lubricating oil chamber 42, thereby ensuring that the return oil from the starter generator 20 and the generator motor 30 flows smoothly back to the intermediate housing 40 under the action of gravity.

[0162] Of course, an installation base plate can be provided inside the intermediate housing 40, on which a total oil return window is opened. The installation base plate divides the interior of the intermediate housing 40 into an installation cavity 41 and a lubricating oil cavity 42. Preferably, a number of built-in drainage grooves or inclined guide surfaces are provided on the installation base plate in the direction towards the total oil return window, so that the oil return from each oil use point is collected in the total oil return window through the built-in drainage grooves or inclined guide surfaces, and falls back into the lubricating oil cavity 42 through the total oil return window.

[0163] In one embodiment, reference is made to Figure 5 and Figure 6 The oil supply point within the starter generator 20 includes the first bearing 51. An annular gap exists between the outer circumference of the starter generator 20's housing and the inner wall of the intermediate housing 40, allowing for the return and collection of lubricating oil. The starter generator 20 is equipped with a lubricating oil inlet for the first bearing, which connects to the first bearing 51.

[0164] Annular gap is a common design term widely used in various mechanical, engineering, and lubrication systems. It typically refers to the gap or space formed around a center between two components, often designed to allow fluid (such as lubricating oil, gas, etc.) to flow or to serve as a return oil or cooling mechanism.

[0165] Lubrication systems in mechanical design: In many mechanical devices, especially between lubricated components (such as bearings, engines, gearboxes, etc.), annular gaps are designed as channels for the return flow of lubricating oil. This gap is typically located between a shaft and a housing, or between multiple mating parts, to facilitate the free flow of lubricating oil or other fluids between components.

[0166] Lubricating oil return: In some applications, the annular gap serves as a return channel for lubricating oil. After flowing through components such as bearings, the lubricating oil returns to the lubricating oil sump or other return oil system through the annular gap, thus forming a closed-loop lubrication system.

[0167] In complex machinery such as turbines and engines, annular gaps are often present between the housing and internal components. These gaps are designed to ensure that lubricating oil can flow freely and return to the appropriate location for cooling or reuse. They also serve to guide fluids such as cooling gases and oil mists, preventing excessive retention or accumulation of lubricating oil.

[0168] Annular clearances are common in equipment such as turbine engines, and their design is particularly important due to the complexity of lubrication and cooling systems. In lubrication systems, annular clearances can also be referred to as return gaps, return channels, etc.

[0169] The transition shaft 50 is provided with a first bearing lubricating oil inlet 53 that corresponds axially to the first bearing lubricating oil inlet. When the transition shaft 50 is connected to the generator 20, the first bearing lubricating oil inlet 53 is sealed and connected to the first bearing lubricating oil inlet by the first sealing ring.

[0170] In specific implementation, two lubricating oil inlets for the first bearing can be provided in the bearing mounting part of the generator 20 where the first bearing 51 is installed. Preferably, these are circular holes with a diameter of about 2.5 mm. The lubricating oil inlets for the first bearing are connected to the first bearing 51 through internal grooves. The transition shaft 50 is provided with two lubricating oil inlets 53 for the first bearing, corresponding to the lubricating oil inlets for the first bearing. The lubricating oil inlets 53 for the first bearing can be arranged according to the specific position and size of the intermediate housing, but their axial positions need to be aligned with the lubricating oil inlets for the first bearing. A first sealing ring is provided at the mating point to form a sealed oil supply channel from the lubricating oil chamber at the bottom of the intermediate housing through the lubricating oil pump and the external oil supply pipeline to the inside of the generator after installation.

[0171] The first bearing oil inlet 53 connects to the first oil inlet 461 on the intermediate housing 40 via the oil passages on the transition shaft 50 and the fixed seat 43. The oil pump 61 delivers the oil in the oil chamber 42 to the first oil inlet 461 via pipeline. The oil then sequentially passes through the first oil inlet 461, the oil passages, the first bearing oil inlet 53, and the first bearing lubricating oil inlet to enter the first bearing 51 for cooling and lubrication. This oil path is as follows: Figure 5 and Figure 12 The lubricating oil path 1 is shown.

[0172] The lubricating oil overflowing from the first bearing 51 flows downward along the bearing seat of the first bearing 51 and the gap in the inner wall of the housing into the lower space inside the generator 20 under the action of gravity. The lower space inside the generator 20 serves as the oil return area of ​​the generator 20 and connects to the annular gap. The lubricating oil in the oil return area of ​​the generator 20 flows into the mounting cavity 41 through the annular gap under the action of gravity and falls back into the lubricating oil cavity 42 through the main oil return window.

[0173] In this embodiment, after the starter generator 20 is assembled onto the intermediate housing 40, the annular gap formed between the outer circle of the starter generator 20 housing and the inner wall of the intermediate housing 40 is directly connected to the upper mounting cavity 41 of the intermediate housing 40. As a result, the lubricating oil cooled and lubricated by the first bearing 51 does not need to go through a special housing return hole, but can naturally flow into the mounting cavity 41 of the intermediate housing 40 under the action of gravity through the internal gap of the housing and the annular gap between the housing and the intermediate housing 40.

[0174] In one embodiment, the oil application point within the generator 20 includes the stator winding 23 region of the generator 20, and there is an annular gap between the outer circumference of the generator housing and the inner wall of the intermediate housing 40.

[0175] Reference Figure 1 and Figure 5 An oil mist nozzle 431 is provided on the mounting base 43. The spray direction of the oil mist nozzle 431 is towards the stator winding 23 area of ​​the generator 20. The oil mist nozzle 431 is connected to the second lubricating oil inlet 462 provided on the intermediate housing 40 through the lubricating oil channel on the mounting base 43. The lubricating oil pump 61 sends the lubricating oil in the lubricating oil chamber 42 to the second lubricating oil inlet 462 through the pipeline. After the lubricating oil passes through the second lubricating oil inlet 462 and the lubricating oil channel in sequence, the oil mist formed by the spray from the oil mist nozzle 431 cools the stator winding 23 of the generator 20. During the rotation of the rotor 21 of the generator 20, the oil splash further cools the winding and surrounding components. This lubricating oil path is as follows: Figure 5 and Figure 12 The lubricating oil path 2 is shown.

[0176] After being sprayed and splashed, the lubricating oil flows into the lower space inside the generator 20 under the action of gravity. The lower space inside the generator 20 serves as the oil return area of ​​the generator 20 and connects to the annular gap. Under the action of gravity, the lubricating oil in the oil return area of ​​the generator 20 flows through the annular gap into the mounting cavity 41 and falls back into the lubricating oil cavity 42 through the main oil return window.

[0177] In this embodiment, after the starter generator 20 is assembled onto the mounting cavity 41, the annular gap formed between the outer circle of the starter generator 20 housing and the inner wall of the intermediate housing 40 is directly connected to the upper motor mounting cavity of the intermediate housing 40. This allows the lubricating oil cooled and lubricated by the stator winding 23 to flow naturally into the mounting cavity 41 of the intermediate housing 40 under the action of gravity, without needing to pass through a special housing return hole, without having to pass through the housing internal gap and the annular gap between the housing and the intermediate housing 40. The oil then falls back into the lubricating oil cavity 42 through the main return window.

[0178] In one embodiment, an internal drain groove or return oil channel can be provided inside the housing of the generator 20 from below the oil consumption point along the direction of the return oil area, so that the lubricating oil flowing out from the first bearing 51 and / or stator winding 23 can be smoothly discharged to the return oil area of ​​the generator 20.

[0179] In one embodiment, reference is made to Figure 10 The generator motor 30 is sealed to the rear flange face 47 of the intermediate housing 40 via the front flange 32 of the motor. A flange chamber 43b is formed on the rear side of the fixed seat 43. The flange chamber communicates with the mounting cavity 41 and is used to receive the return oil from inside the generator motor 30. Figure 10As shown, the flange chamber and the mounting cavity 41 are connected by a chamber return port 432 located at the bottom of the flange chamber, so that the return oil flowing into the flange chamber is discharged into the mounting cavity 41 through the chamber return port 432, and then falls back into the lubricating oil chamber 42 under the action of gravity.

[0180] In practical implementation, a stepped structure for precise positioning is provided on the flange face of the motor front flange 32. The cylindrical positioning surface of the step is interference-fitted or clearance-fitted with the mating hole on the intermediate housing 40, achieving coaxial positioning of the generator motor 30 relative to the intermediate housing 40. An annular O-ring groove is also provided on the flange face of the motor front flange 32, and a second sealing ring is installed in the O-ring groove. When the generator motor 30 is assembled into the intermediate housing 40, the second sealing ring is pressed tightly against the end face of the intermediate housing 40, forming a sealed flange chamber 43b. Furthermore, the generator motor 30 is fixedly connected to the intermediate housing 40 by several screws. The screw holes mate with the stepped positioning surface, ensuring reliable positioning of the generator motor 30 in both the axial and radial directions, and guaranteeing a stable sealing and communication relationship between the flange chamber and the internal oil cavity of the intermediate housing 40.

[0181] The generator 30 has a third oil inlet 33 on its top housing. A housing oil return hole 34 is located on the side of the generator 30 housing near the intermediate housing 40. An oil collection area is located at the bottom of the generator 30 housing. One end of the housing oil return hole 34 connects to the oil collection area, and the other end opens into the flange cavity. The oil pump 61 delivers the oil from the oil chamber 42 to the third oil inlet 33 via a pipeline. The oil enters the generator 30 housing through the third oil inlet 33 to cool and lubricate the oil-using points within the generator 30. Under gravity, the oil flows into the oil collection area and is discharged into the flange cavity through the housing oil return hole 34. Under gravity, the oil flows through the flange cavity into the mounting cavity 41 and falls back into the oil chamber 42 through the main oil return window. This oil path is as follows: Figure 5 and Figure 12 The lubricating oil path 3 is shown.

[0182] In one embodiment, the oil collection area is located on the side near the intermediate housing 40. Inside the housing of the generator motor 30, an internal drainage groove or return oil channel is provided from below the oil consumption point along the direction of the oil collection area. The bottom surface of the internal drainage groove or return oil channel is inclined towards the intermediate housing 40 relative to the axial direction of the generator motor 30. This allows the lubricating oil located below the oil consumption points such as the far-end bearing and winding cooling area of ​​the generator motor 30 to be guided by gravity to the oil collection area on the side near the intermediate housing 40, and to be collected together with the return oil flowing through the near-end bearing and winding cooling area in the oil collection area.

[0183] In one embodiment, the housing oil return hole 34 is located at the lower half of the front end of the housing of the generator motor 30.

[0184] In one embodiment, reference is made to Figure 5 The oil supply point inside the generator 20 includes the second bearing 52. There is an annular gap between the outer circle of the generator housing and the inner wall of the intermediate housing 40 for the return and collection of lubricating oil.

[0185] The generator motor 30 has an axial oil passage inside its shaft connection end, which connects to some of the oil supply points of the generator motor 30. The coupling assembly 70 has an axial oil passage inside, and the rear side of the power turbine output shaft 12 has an axial oil passage inside. The oil passage at the shaft connection end is connected to the oil passage of the power turbine output shaft 12 via the oil passage of the coupling assembly 70. The power turbine output shaft 12 and the power turbine output shaft sleeve 13 are provided with several radial oil outlet holes that are connected internally and externally. The radial oil outlet holes are respectively connected to the oil passage of the power turbine output shaft 12 and the second bearing 52.

[0186] The generator motor 30 has a third oil inlet 33 on its housing. The oil pump 61 delivers oil from the oil chamber 42 to the third oil inlet 33 via a pipeline. The oil enters the generator motor 30 housing through the third oil inlet 33 to cool and lubricate the oil-consuming points within the generator motor 30. Some of the oil passes through the oil channels sequentially through the oil channels at the shaft connection end, the coupling assembly 70, the power turbine output shaft 12, and several radial oil outlets to enter the second bearing 52 for cooling and lubrication. This oil path is as follows: Figure 5 and Figure 12 The lubricating oil path 4 is shown.

[0187] The lubricating oil overflowing from the second bearing 52 flows downward along the bearing seat of the second bearing 52 and the gap in the inner wall of the housing into the lower space inside the generator 20 under the action of gravity. The lower space inside the generator 20 serves as the oil return area of ​​the generator 20 and connects to the annular gap. The lubricating oil in the oil return area of ​​the generator 20 flows into the mounting cavity 41 through the annular gap under the action of gravity and falls back into the lubricating oil cavity 42 through the main oil return window.

[0188] In this embodiment, after the starter generator 20 is assembled onto the intermediate housing 40, the annular gap formed between the outer circle of the starter generator 20 housing and the inner wall of the intermediate housing 40 is directly connected to the motor mounting cavity on the upper part of the intermediate housing 40. As a result, the lubricating oil cooled and lubricated by the second bearing 52 does not need to go through a special housing return oil hole. It can flow naturally into the mounting cavity 41 of the intermediate housing 40 under the action of gravity through the internal gap of the housing and the annular gap between the housing and the intermediate housing 40, and fall back into the lubricating oil cavity 42 through the main return oil window.

[0189] In one embodiment, reference is made to Figure 11The engine 10 is sealed to the front flange 48 of the intermediate housing 40 via the connecting flange 14, forming a sealed chamber at the rear of the engine 10 and the front of the intermediate housing 40 to ensure that the lubricating oil at the flange connection does not leak.

[0190] In specific implementation, a connecting flange 14 is provided on the rear side of the engine 10. The connecting flange 14 is provided with several bolt holes for locking the engine 10 and at least one pair of locating pin holes. An annular sealing groove for installing a sealing ring is provided on the rear end face of the connecting flange 14. The annular sealing groove is located in the annular area between the bolt holes and the locating pin holes. A third sealing ring is provided in the annular sealing groove. The front flange 48 of the intermediate housing 40 is locked and coaxially positioned with the connecting flange 14 by bolts and locating pins. The third sealing ring is pressed between the front flange 48 of the housing and the connecting flange 14, thereby forming a sealed chamber.

[0191] A first-path lubricating oil passage is provided on the connecting flange 14. One end of the first-path lubricating oil passage is connected to the lubrication pipeline system of the engine 10 itself, and is used to supply oil to the lubrication points inside the engine 10, such as the front bearing of the power turbine output shaft and the bearing of the compressor shaft. The other end of the first-path lubricating oil passage is connected to the fourth lubricating oil inlet 465 on the intermediate housing 40 via the pipeline 141 and the lubricating oil passage inside the intermediate housing 40. The lubricating oil pump 61 sends the lubricating oil in the lubricating chamber 42 to the fourth lubricating oil inlet 465 via the pipeline. The lubricating oil sequentially enters the lubrication pipeline system of the engine 10 through the fourth lubricating oil inlet 465, the lubricating oil passage in the intermediate housing 40, and the first-path lubricating oil passage of the connecting flange. After cooling and lubricating the lubricated parts inside the engine 10, the lubricating oil is sent back to the lubricating chamber 42 through the oil return port on the engine 10 via the pipeline. This lubricating oil path is as follows: Figure 5 and Figure 12 The oil path shown is from oil path 5 to oil path 5-1. It can be seen that this oil path does not pass through the internal cavity of the intermediate housing 40, thus maintaining the integrity of the original lubrication circuit of the engine.

[0192] The engine 10 has a second lubricating oil passage. One end of the second lubricating oil passage connects to the rear bearing 10b, which supports the compressor shaft 10a, via a lubricating oil passage within the engine 10. The other end of the second lubricating oil passage connects to the fourth lubricating oil inlet 465 located on the intermediate housing 40 via a lubricating oil passage within the intermediate housing 40. The lubricating oil pump 61 delivers lubricating oil from the lubricating oil chamber 42 to the fourth lubricating oil inlet 465 via a pipeline. The lubricating oil sequentially passes through the fourth lubricating oil inlet 465, the lubricating oil passage, and the second lubricating oil passage before entering the rear bearing 10b for cooling and lubrication. This lubricating oil path is as follows: Figure 5 and Figure 12 The oil path 5 to oil path 5-2 are shown.

[0193] The lubricating oil overflowing from the rear bearing 10b flows along the pre-set drainage path inside the engine 10 under the action of gravity to the low position area of ​​the casing near the intermediate housing 40. It is discharged into the mounting cavity 41 of the intermediate housing 40 through the oil return opening set in the low position area of ​​the casing, and falls back into the lubricating oil chamber 42 through the main oil return window.

[0194] Through the above arrangement, on the one hand, the positioning pin hole, bolt hole and sealing ring structure on the connecting flange 14 of the engine 10 realize the reliable positioning and sealing between the engine 10 and the intermediate housing 40; on the other hand, the first lubricating oil maintains the independent oil return path of the engine's own lubrication pipeline system, while the second lubricating oil flows back to the intermediate housing cavity by gravity after being lubricated through the power turbine output shaft 12. Thus, without interfering with the original oil return system of the engine 10, the lubrication of the rear bearing 10b of the compressor shaft 10a is incorporated into the lubricating oil circulation loop with the intermediate housing 40 as the oil storage center.

[0195] Reference Figures 13 to 23 This invention provides a motor and controller integrated system, which includes a generator motor 310, a controller housing 320, and a motor controller assembly. The motor controller assembly is used to control the operation of the generator motor 310. The motor controller assembly includes a power module assembly 330 and a controller base plate 380. The power module assembly 330 includes several SiC power semiconductor modules 331 and several connecting conductive bars 332, one end of which is electrically connected to the AC terminals of the SiC power semiconductor modules. The other end of the connecting conductive bars 332 is used for electrical connection to the three-phase winding terminals of the generator motor 310. Figure 15 As shown, the three-phase winding terminals of the generator motor 310 are also known as the winding lead-out terminals. These winding lead-out terminals include leads U, V, and W. Each phase winding lead-out terminal is connected to a corresponding connecting bus 332. The connecting bus 332 is used to transmit three-phase AC current between the power module 331 and the generator motor 310. The power module 331 is integrated on the controller base plate 380.

[0196] The power module assembly 330 is the core power conversion unit in the motor controller assembly, used to convert electrical energy between the DC bus and the three-phase windings of the generator motor under the drive of the control board assembly. Specifically, the DC terminal of the power module is electrically connected to the DC bus capacitor assembly and the external DC power supply. Under the action of the gate drive signal output by the control board, several SiC power switching devices inside the power module are turned on and off at a preset switching frequency and duty cycle, thereby inverting the DC bus electrical energy into three-phase AC current to supply the three-phase windings of the generator motor, or rectifying the three-phase AC electrical energy output by the generator motor into DC electrical energy and feeding it back to the DC bus under the generator motor operation.

[0197] The motor controller assembly is housed within the controller housing 320, and a mounting area for accommodating the connecting conductor 332 is provided between the rear of the motor controller assembly and the controller housing 320. A generator motor 310 is fixedly mounted above the controller assembly via the controller housing 320, and the three-phase winding terminals of the generator motor 310 are located at the rear of the generator motor 310. In other words, the generator motor 310 and the motor controller assembly are integrated together via the controller housing 320.

[0198] Several AC terminals of the power module 331 are arranged side by side in the installation area. Each AC terminal is electrically connected to a connecting conductive bar 332. Each connecting conductive bar 332 extends upward in the installation area and is electrically connected to each of the three-phase winding terminals of the generator motor 310. Specifically, each connecting conductive bar 332 bends upward from the lower AC terminal and extends to the upper three-phase winding terminal for connection.

[0199] like Figures 16 to 20 As shown, the power module assembly 330 includes two power modules 331 and six connecting conductive bars 332. Each connecting conductive bar 332 extends from its upper and lower ends to the AC terminal and the three-phase winding terminal, respectively. A connecting conductive bar 332 electrically connects a single AC terminal to a single three-phase winding terminal. In other words, on each phase, a directly electrically connected relationship is established between the AC terminal of the power module 331 and the corresponding three-phase winding terminal by an integrally formed connecting conductive bar 332, without the need for intermediate connectors, flexible cables, or intermediate terminals.

[0200] With the above structure, the power circuit between the generator motor 310 and the motor controller assembly is entirely composed of the integrally formed connecting conductive bus 332. Compared with the traditional "airplane plug + cable" connection, it reduces the number of contact points and wiring length, reduces the circuit inductance and contact resistance, and at the same time reserves sufficient space for the subsequent addition of an integrated housing on the outside.

[0201] In practical implementation, both the AC terminals and the three-phase winding terminals can be provided with screw holes or welded end faces to reserve positions for rigid connection with the connecting busbar 332. Therefore, when the connecting busbar 332 is electrically connected to the AC terminals and the three-phase winding terminals, it is preferable to achieve the electrical connection by bolt crimping or welding.

[0202] In one embodiment, a support structure may be provided on the connecting conductive bus 332, and the connecting conductive bus 332 is fixed to a fixing member through the support structure. The fixing member is a relatively stationary device, such as the controller housing 320 or the motor flange of the generator motor 310. Therefore, it is preferable that the connecting conductive bus 332 is fixed to the controller housing 320 or the motor flange of the generator motor 310 through the support structure. By providing a support structure on the connecting conductive bus for positioning support, the mechanical strength under vibration environment is improved and the electrical clearance between phases and to ground is ensured.

[0203] In one embodiment, the support structure is an insulating bracket.

[0204] In one embodiment, reference is made to Figure 15 , Figure 19 and Figure 23 The controller housing 320 includes a front cover plate 322, a rear cover plate 323, a first side plate 324 and a second side plate 325 arranged along the axial direction, and a top cover 326. The front cover plate 322, the rear cover plate 323, the first side plate 324, the second side plate 325 and the top cover 326 form the controller housing 320.

[0205] The front and rear portions of the generator 310 are fixedly connected to the front cover plate 322 and the top cover 326, respectively. Specifically, the front cover plate 322 has a downwardly recessed opening, which is detachably fixed to the lower edge of the flange on the front end face of the generator 310. The top cover 326 is spaced at a predetermined distance from the front cover plate 322, so that the front top portion of the controller housing 320 is an open structure with an opening. This open structure accommodates the generator 310 and allows the portion of the generator from the front to the front edge of the top cover 326 to be exposed outside the controller housing 320. The top cover 326 is an arc-shaped cover with an upward convex center. The top cover 326 covers the rear portion of the generator 310 and the mounting area. The front end of the top cover 326 is detachably fixed to the motor housing of the generator 310, and the rear end of the top cover 326 is detachably fixed to the rear cover plate 323. The top cover 326 is designed primarily to seal the area from the three-phase winding terminals of the generator motor 310 to the motor controller assembly, while leaving other parts of the generator motor 310 exposed, thus reducing the overall weight.

[0206] When the generator motor 310 is installed on the controller housing 320, the axis of the generator motor 310 is in the front-to-back direction, and the reserved space 327 is located on the left and right sides of the generator motor 310.

[0207] In other words, the controller housing 320 has an installation space in the front-to-back direction in the middle, which is used to install the generator motor 310. The left and right sides of the installation space have reserved spaces 327 for integrating other devices, which are located above the motor controller assembly.

[0208] In one embodiment, reserved spaces 327 for integrating other devices are respectively arranged on the left and right sides of the controller housing 320 along the axial direction of the generator motor. The reserved spaces 327 are located above the motor controller assembly and on the left and right sides of the generator motor 310.

[0209] When the controller housing 320 has a first side plate 324 and a second side plate 325, a reserved space 327 is provided on the outside of the first side plate 324 and the second side plate 325.

[0210] In one embodiment, at least one of a fuel pump controller, an oil pump controller, a starter / generator controller, and an engine controller is integrated on the reserved space 327.

[0211] like Figures 13 to 15 As shown, in a specific example, a first controller module 391, which integrates the engine controller and the lubricating oil pump controller, is installed in a reserved space on one side of the controller housing 320 along the axial direction of the generator 310. A second controller module 392, which integrates the generator controller and the fuel pump controller, is integrated in a reserved space on the other side of the controller housing 320 along the axial direction of the generator 310.

[0212] In this example, the term "controller module" refers to a controller structure that integrates two or more control function units within the same sealed housing. These control function units can share the housing only in terms of mechanical structure, or they can share some hardware resources at the circuit level. Specifically, they can include the following two typical forms:

[0213] In the first configuration, multiple independent controllers share a single housing:

[0214] In this case, the controller module can adopt a structure where multiple independent controllers share the same housing. For example, one housing space can accommodate two independent control sub-modules: the first control sub-module serves as the starter-generator controller, and the second control sub-module serves as the fuel pump controller. The first and second control sub-modules are independent in both hardware and software, each consisting of its own printed circuit board, power management circuit, microcontroller, and communication interface. They are electrically connected to the starter-generator, fuel pump, and overall control network via their respective external connectors. They share the same aluminum alloy housing and mounting reference surface only in terms of mechanical structure, and can also share the housing's heat dissipation and electromagnetic shielding structures. This shared housing arrangement, compared to using two separate housings, reduces the number of housings and fasteners, saves installation space, and lowers processing and assembly costs, while maintaining the complete electrical independence of the starter-generator controller and the fuel pump controller.

[0215] The second type is a multi-functional controller integrating multiple control units:

[0216] At this point, the controller module can adopt a multi-functional controller structure with multiple control units arranged inside the housing. For example, a starter-generator control unit and a fuel pump control unit can be integrated in the same housing: they are independent in terms of the controlled objects and control algorithms, and are used to drive the starter-generator and fuel pump respectively for status monitoring, but share the same housing, printed circuit board, power filter, and communication interface hardware resources in terms of physical structure. By integrating the functions that could originally be achieved by two independent controllers into a single multi-functional controller module, the number of controllers and housings can be further reduced, the length of signal and power lines can be shortened, the overall wiring complexity and weight can be reduced, and centralized control of actuators such as the engine, starter-generator, and fuel / oil pump can be completed within the limited installation space of the intermediate fuel tank.

[0217] The layout design described in this embodiment not only improves the system's compactness but also effectively shortens the connection lines between components, saving cable costs and reducing signal transmission loss and energy loss.

[0218] The fuel pump controller and oil pump controller are responsible for monitoring the supply status of fuel and oil, ensuring that the engine receives stable and adequate lubrication and cooling under different operating conditions. This is crucial for extending engine life and improving operating efficiency. The fuel pump controller, oil pump controller, and related accessories can be directly integrated into the controller housing 320 of this invention using existing technology, and will not be described in detail here.

[0219] The starter generator controller serves a dual purpose: starting the engine and, when necessary, acting as a generator to supply power to the system. By precisely controlling the speed and torque of the starter motor, the starter generator controller ensures a smooth engine start. Simultaneously, during flight or when stationary on the ground, it switches to generator mode as needed to provide stable power support to onboard equipment. The starter generator controller can be directly integrated into the controller housing 320 of this invention using existing technology, and will not be elaborated further here.

[0220] The engine controller receives data from various sensors, including but not limited to key parameters such as temperature, pressure, and engine speed. After analysis using a preset algorithm, it precisely adjusts fuel injection quantity, intake air volume, and ignition timing to ensure the engine always operates at its optimal state, achieving efficient and low-emission power output. The engine controller can be directly integrated into the controller housing 320 of this invention using existing technology, and will not be elaborated further here.

[0221] In one embodiment, reference is made to Figure 16 , Figure 18 and Figure 19The bottom of the controller base plate 380 is equipped with heat dissipation teeth 328 to achieve air cooling.

[0222] In one embodiment, a cooling fan is provided on the side of the heat dissipation fins 328 to further improve the heat dissipation effect. The controller base plate 380 adopts a U-shaped structure, and the cooling fan can be installed on the side wall of the controller base plate 380.

[0223] In one embodiment, reference is made to Figure 14 The generator motor 310 has a flange 311 on its front end face and an internal spline 312 for transmission in the middle of its front end. The flange 311 and the internal spline 312 are used to connect the generator motor 310 and the engine.

[0224] In this embodiment, the integrated system is positioned and installed using the flange stop and bolts of the generator 310, and transmission is achieved through an internal spline connection. Depending on the actual engine interface, the flange size, bolt connection method, and spline adapter are adjusted to connect engines of different types and power. This allows for flexible assembly by setting different flange sizes and spline interfaces for the generator 310 port, enabling the connection of different engines.

[0225] This embodiment greatly expands the application range of the system due to its compatibility with different types and power engines. Whether it is a small single-shaft engine or a dual-shaft engine, stable and reliable connection and transmission can be achieved by adjusting the corresponding flange size, bolt connection method and spline adapter according to its interface characteristics. This not only reduces the cost and time of developing matching systems for different engines, but also improves the system's versatility and maintainability.

[0226] In one embodiment, reference is made to Figure 17 The power module assembly 330 also includes a phase current sensor 333 for detecting phase current. In this embodiment, by placing the phase current sensor 333 on the power path, the distance between the control board and the power module is short, the control loop delay is small, which is beneficial for high-frequency precise control.

[0227] In practical implementation, the phase current sensor 333 can be placed on the connection path between the AC terminals of the power module and the connecting busbar. For example, an AC busbar can be added between the AC terminals of the power module and the connecting busbar, with one end of the AC busbar electrically connected to the AC terminals and the other end electrically connected to the connecting busbar. The phase current sensor 333 is placed on the AC busbar to detect the phase current of the AC busbar. The signal output terminal of the phase current sensor 333 is connected to the control board of the control board assembly.

[0228] Of course, each AC terminal of the power module is equipped with a corresponding phase current sensor 333 to detect the phase current of each phase.

[0229] In one embodiment, reference is made to Figures 18 to 20 The controller base plate 380 has a length direction that is horizontally perpendicular to the axis of the generator motor 310, and a width direction that is parallel to the axis of the generator motor 310, preferably adopting a U-shaped structure. The controller base plate 380 is fixed below the generator motor 310, so that the entire motor controller assembly is located in the lower central area of ​​the generator motor 310, thereby forming reserved spaces 327 on the left and right sides of the generator motor 310 for arranging other controllers or accessories.

[0230] The power module assembly 330 is located in the middle area of ​​the controller base plate 380. The length direction of each power module 331 of the power module assembly 330 is the left-right direction, and several power modules 331 are installed side by side on the controller base plate 380 along the left-right direction.

[0231] The DC bus capacitor assembly 340 includes several DC capacitors and interconnecting busbars electrically connected to each DC capacitor, and is equipped with a bus current sensor for detecting the DC bus current. Several DC capacitors are arranged side-by-side along the left-right direction on the front side of the controller base plate 380, i.e., in front of the power module assembly 330. An interconnecting busbar is arranged behind them. Several connection points are provided on the side of the interconnecting busbar facing the power module assembly 330, for connecting the positive and negative terminals of the several DC capacitors in parallel to form a DC bus capacitor group. The connection points on this side provide electrical connection interfaces with the DC busbar and external DC power supply interface. The DC terminals of the power modules 331 are located on the front side of each power module 331. The positive and negative DC terminals of the power modules 331 are electrically connected to the corresponding connection points of the interconnecting busbars through positive and negative DC busbars, respectively.

[0232] The arrangement and connection of the DC bus capacitor assembly 340 and the power module assembly 330 described above have the following beneficial effects:

[0233] First, since several DC capacitors are arranged side-by-side in the left-right direction, their interconnecting busbars and the connection points of the connected DC busbars are concentrated on one side near the rear end of the generator motor 310. This allows the DC bus capacitor assembly 340 and the power module assembly 330 to form a power unit strip on the controller base plate 380 that extends in the left-right direction and converges towards the generator motor 310. This reduces the space occupied by the controller in the front-back direction, allowing the motor controller assembly to be compactly arranged in the middle area below the generator motor 310, facilitating the integrated installation of the generator motor and the controller. On the other hand, the three-phase AC terminals of the power module 331 and the three-phase winding terminals of the generator motor 310 are also concentrated on one side near the rear end of the generator motor. The three-phase output busbar can extend directly upward from this side and rigidly connect to the generator motor terminals without needing to cross the DC capacitor area for wiring. This further shortens the spatial distance between the generator motor and the motor controller assembly, reduces the number and length of high-current connectors, and improves the overall space utilization and integration of the device.

[0234] Secondly, several DC capacitors are arranged side by side in the left-right direction, and an interconnecting bus is set on the rear side of them. The DC terminals of the power module 331 are directly connected to the interconnecting bus via a short-pitch DC bus. This forms a DC bus loop with a very short path and a small loop area between the DC capacitor bank and the DC terminals of the power module. This is beneficial to significantly reduce the equivalent inductance of the DC bus loop, reduce the voltage spikes and oscillations of the bus during switching, and improve the electromagnetic compatibility performance and reliability of the power module under high-frequency switching conditions.

[0235] The bus current sensor is preferably installed on one of the DC busbars or interconnecting busbars. It can directly collect the bus current in the main circuit of the DC busbar, realize accurate monitoring of the input current of the power module, and provide reliable detection signals for DC busbar overcurrent protection, power limiting and fault diagnosis, further improving the safety and intelligence level of the motor controller components.

[0236] The external DC power interface 3211 is connected to another connection point of the interconnecting bus via a short-circuit copper bus or wire, so that the external DC power supply, the DC bus capacitor bank, and the DC terminals of the power module assembly 330 together form a DC bus circuit. In this way, since the interconnecting bus is electrically connected to several DC capacitor terminals, the DC bus, and the external DC power interface 3211 through multiple connection points, the above components are electrically located at the same bus node. On the one hand, this facilitates current and voltage sharing among multiple DC capacitors, avoids excessive ripple current on a single capacitor, and extends the service life of the DC bus capacitor bank. On the other hand, it simplifies the wiring path between the external DC power supply and the power module, reduces the number of high-current wires and connectors, and helps to improve the compactness and assembly reliability of the overall structure.

[0237] In practical implementation, the positive and negative DC busbars are preferably plate-shaped copper strips, separated by an insulating component to ensure sufficient electrical clearance and reduce the equivalent inductance of the DC bus circuit. The DC capacitors in the DC bus capacitor assembly 340 are arranged close to the DC terminals of each power module 331, forming a short DC bus circuit. This circuit smooths the DC bus voltage, provides transient energy for power module switching, and suppresses DC bus voltage ripples and spikes. The power module assembly 330, driven by the control board, performs energy conversion between DC and three-phase AC. An AC busbar located on the controller base plate 380 near the generator motor 310 transmits large three-phase current between the AC terminals of the power module assembly and the three-phase winding terminals of the generator motor 310, achieving a rigid conductive connection.

[0238] A DC power interface 3211 is provided on the side wall (one side of the U-shaped structure) of the controller base plate 380. The DC power interface 3211 is electrically connected to the power input terminal of the DC bus capacitor assembly 340 and is used to introduce external DC power into the DC bus capacitor assembly 340.

[0239] In a preferred embodiment, the connecting busbar 332, the DC busbar, and the interconnecting busbar are all made of copper to reduce conductivity loss and improve mechanical rigidity. Of course, in another embodiment, the aforementioned busbars can also be made of aluminum or other conductive materials with good conductivity; this invention does not limit the choice.

[0240] like Figure 19 As shown, the motor controller assembly also includes a control board assembly 350, which includes a control board for driving the power modules 331 and an outer shielding plate disposed on the outside of the control board. The control board is electrically connected to several power modules 331 and phase current sensors via wiring harnesses or board-to-board connectors. The control board assembly 350 can be disposed above or to the side of several power modules 331, or above or to the side of several DC capacitors; preferably, the control board assembly 350 is disposed above several power modules 331 to shorten the wiring length between the control board and the power modules, reduce control loop delay, and facilitate high-frequency precise control.

[0241] The controller base plate 380 also has a controller power supply interface 3210 on its side wall surface. The controller power supply interface 3210 is used to provide low-voltage power to the control board assembly 350 and can also serve as a debugging and calibration interface. The pins of the controller power supply interface 3210 are electrically connected to the control board via wiring harnesses. In specific implementations, the low-voltage power supply interface and the debugging interface can be integrated into a single controller power supply interface 3210, thereby saving a separate aviation plug interface.

[0242] like Figure 19As shown, the motor controller assembly may also include a shielding partition 360. When the control board assembly 350 is arranged above several power modules 331, the shielding partition 360 is arranged above the control board assembly 350 to shield the electromagnetic coupling between the control board assembly 350 and the external environment, thereby improving the electromagnetic compatibility performance of the controller assembly under high voltage and high current conditions.

[0243] In one embodiment, reference is made to Figure 19 The controller base plate 380 extends horizontally along its length and vertically along its width. The power module assembly 330 also includes a cold plate 370, which has internal liquid cooling channels. The cold plate 370 extends horizontally along its length and is mounted on the controller base plate 380. The power module 331 is mounted on the cold plate 370, and its length also extends horizontally. When the liquid cooling medium flows through the internal liquid cooling channels of the cold plate 370, heat exchange occurs between the liquid cooling medium and the power module 331, thus cooling the power module 331.

[0244] In this embodiment, the power module components are uniformly mounted on a cold plate 370 with internal liquid cooling channels. The cold plate 370 is fixed to the controller base plate 380, and the cold plate 370 and the controller base plate 380 together bear mechanical loads and vibrations. Liquid cooling medium is circulated inside the cold plate 370 to cool the power module components. The cold plate 370, the controller base plate 380, and the vertical connecting conductive busbar 332 form a mutually supporting integrated frame.

[0245] In one embodiment, the liquid cooling medium is fuel oil, used to cool the power module components.

[0246] In this embodiment, the liquid cooling medium introduced into the cold plate is the fuel already present in the engine system, which can achieve liquid cooling by fuel cooling method without the need to set up a new cooling circuit, reducing system complexity and added mass.

[0247] In one embodiment, a fuel cooling channel is provided inside the motor housing of the generator motor 310. The inlet of the liquid cooling channel of the cold plate 370 is connected to the fuel pump 394 via a pipeline, and the outlet of the liquid cooling channel of the cold plate 370 is connected to the inlet of the fuel cooling channel of the generator motor 310 via a pipeline. The outlet of the fuel cooling channel of the generator motor 310 is connected to the fuel pump 394 via a pipeline. The fuel pump delivers fuel through the pipeline into the liquid cooling channel to cool the power module 331. After cooling the generator motor 310, the fuel is delivered through the pipeline into the fuel cooling channel to cool the generator motor 310. The fuel is then delivered from the fuel cooling channel to the engine for combustion via the fuel pump 394.

[0248] In this embodiment, when the liquid cooling medium is fuel oil, the fuel oil first cools the motor controller assembly, especially the power module, and then is used to cool the motor housing of the generator motor 310 before finally being delivered to the engine for combustion.

[0249] In specific implementation, refer to Figure 21 and Figure 22 The controller housing 320 is provided with a fuel inlet 3212 and a fuel outlet 3213. The fuel inlet 3212 and the fuel outlet 3213 are respectively connected to the liquid cooling channel inlet and liquid cooling channel outlet of the cold plate. The fuel inlet 3212 is connected to the fuel pump 394 through a pipeline. The fuel outlet 3213 is connected to the fuel cooling channel inlet of the motor housing of the generator motor 310 through a pipeline. The fuel cooling channel outlet of the motor housing is connected to the fuel pump 394 through a pipeline. The fuel pump 394 sends fuel from the external fuel tank into the liquid cooling channel of the cold plate 370 through the pipeline and the fuel inlet 3212 to cool the power module. After cooling, the fuel is sent into the fuel cooling channel of the motor housing through the pipeline. The motor housing cools the motor windings and magnets in the generator motor 310. Then, the fuel is sent out from the fuel cooling channel to the engine for combustion through the fuel pump 394.

[0250] In this embodiment, when the controller housing 320 has a reserved space 327, the fuel pump controller of the fuel pump 394 is preferably disposed in the reserved space 327 on the controller housing 320.

[0251] Reference Figure 24 This is a simulation diagram showing the fuel flow to the cold plate 370 where the power module assembly 330 is located. The simulation temperature parameters are shown in the table below:

[0252]

[0253] Reference Figures 25A to 25C This is a simulation diagram showing the fuel flow after it reaches the generator 310. Figure 25A This is a schematic diagram simulating the surface temperature of the motor housing. Figure 25B This is a simulation diagram of the surface temperature of the motor windings. Figure 25C This is a simulation diagram of the surface temperature of the magnet. The simulation temperature parameters are shown in the table below:

[0254]

[0255] In the table above, the fuel inlet refers to the fuel cooling channel inlet of the motor housing, and the fuel outlet refers to the fuel cooling channel outlet of the motor housing.

[0256] It is evident that when the fuel temperature at the inlet of the fuel cooling channel is 80°C, it can meet the heat dissipation requirements of the generator motor 310 and the power module assembly 330, and can be used as the cooling liquid for the motor controller assembly of the present invention.

[0257] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An integrated hybrid system comprising an engine, a motor-generator, and a generator motor, characterized by, The integrated hybrid system further comprises: An intermediate box comprising an upper mounting cavity and a lower oil cavity, the oil cavity being provided with an oil outlet communicating between the inside and outside, the oil outlet being connected with an external oil pump, through which the oil in the oil cavity is sent to each oil point in the engine, the starter-generator and the generator through pipelines, and the oil return pipelines of each oil point respectively communicate with the oil cavity; A transition shaft, the front side of which penetrates into the inside of the rotor of the starter-generator and the outer circle of which is fixed with the inner circle of the rotor of the starter-generator through a first bearing; A fixing seat is arranged in the mounting cavity for fixing, the fixing seat being fixed on the rear side of the inner wall of the mounting cavity, the front end of the fixing seat having a mounting hole extending to the transition shaft and matching with the transition shaft, the transition shaft being fixedly connected through the mounting hole; The casing of the starter-generator is fixed on the inner wall of the mounting cavity; The rear side of the engine is fixed on the front side of the intermediate box, the compressor shaft of the engine is connected with the drive end cover of the starter-generator through a straight tooth spline meshing connection, the power turbine output shaft of the engine and the power turbine output shaft sleeve arranged outside the power turbine output shaft protrude from the front side and extend to the rear side of the transition shaft, and the outer circle of the power turbine output shaft sleeve is fixed with the inner circle of the transition shaft through a second bearing; The front side of the generator is fixed on the rear side of the intermediate box, and the front side of the shaft connection end of the generator extends into the mounting cavity above the intermediate box and connects the power turbine output shaft through a shaft coupling assembly.

2. The integrated hybrid system of claim 1, wherein, The integrated hybrid system further comprises a resolver assembly, the resolver assembly comprising: A resolver adapter disc comprising a fixed end flange and a rotating end flange, the fixed end flange being fixedly connected with the front end surface of the inner wall of the mounting cavity, and the rotating end flange being fixedly connected with the drive end cover of the starter-generator, so that the rotating end flange rotates with the rotor of the starter-generator through the drive end cover; A resolver comprising a resolver rotor and a resolver stator arranged oppositely inside and outside, the resolver rotor being fixed on the rotating end flange, and the resolver stator being fixed on the fixed end flange, the resolver stator being connected with an external wire harness, the external wire harness extending out of the front end of the intermediate box.

3. The integrated hybrid system of claim 1, wherein, The shaft coupling assembly comprises: A spline hollow shaft, the front side of which abuts against or is connected with the power turbine output shaft sleeve, and the rear side of which has a first inner spline; A spline connecting shaft, the front side of which is provided with a first outer spline, the spline connecting shaft extending into the inside of the rear side of the spline hollow shaft, and the first outer spline being meshingly connected with the first inner spline, and the rear side of the spline connecting shaft being provided with a second outer spline, the second outer spline being meshingly connected with a second inner spline arranged on the shaft connection end of the generator; Preferably, the front side of the spline hollow shaft is internally provided with a hollow shaft step extending towards the shaft center, the rear side of the power turbine output shaft sleeve is externally provided with a platform matched with the hollow shaft step, the platform extends into the front side of the spline hollow shaft, the rear end of the power turbine output shaft passes through the hollow shaft step from the front side of the spline hollow shaft and is threadedly connected with a locking nut at the rear side of the hollow shaft step to realize fixed connection with the spline hollow shaft, and the front side end surface of the spline hollow shaft is abutted with the rear side end surface of the power turbine output shaft sleeve through the locking nut.

4. The integrated hybrid system of claim 1, wherein, The integrated hybrid system further comprises: The heat exchanger is communicated with the oil pump, and the heat exchanger pipeline of the heat exchanger is communicated with the oil pump, so that the oil in the oil cavity is sent into the heat exchanger pipeline through the oil pump for heat exchange, and the cooled oil after heat exchange is sent to each oil point in the engine, the motor generator and the generator through the pipeline respectively; Preferably, the heat exchanger is a wind-cooled radiator.

5. The integrated hybrid system according to any one of claims 1 to 4, wherein, The bottom of the mounting cavity is provided with one or a plurality of upper and lower communication total oil return windows, and the oil return of each oil point is communicated with the oil cavity through the total oil return window.

6. The integrated hybrid system of claim 5, wherein, The mounting cavity is provided with a plurality of built-in drainage grooves or inclined flow guide surfaces in the direction towards the total oil return window, so that the oil return of each oil point is collected to the total oil return window through the built-in drainage grooves or inclined flow guide surfaces, and falls back to the oil cavity through the total oil return window.

7. The integrated hybrid system of claim 5, wherein, The oil point in the motor generator includes a first bearing, and the outer circle of the motor generator shell and the inner wall of the intermediate box body have an annular gap, the motor generator is provided with a first bearing lubricating oil inlet, and the first bearing lubricating oil inlet is communicated with the first bearing; The transition shaft is provided with a first bearing oil inlet hole axially corresponding to the first bearing lubricating oil inlet, and the transition shaft is connected with the motor generator, and the first bearing oil inlet hole is sealed and connected to the first bearing lubricating oil inlet through a first sealing ring; The first bearing oil inlet hole is communicated with the first oil inlet of the intermediate box body through the oil channel on the transition shaft and the oil channel on the fixed seat respectively, the oil pump sends the oil in the oil cavity to the first oil inlet through the pipeline, and the oil enters the first bearing for cooling and lubrication through the first oil inlet and the oil channel, the first bearing oil inlet hole and the first bearing lubricating oil inlet in sequence, the overflowed oil of the first bearing flows downward along the bearing seat of the first bearing and the gap between the inner wall of the shell to the lower space in the motor generator under the action of gravity, the lower space in the motor generator as the oil return area of the motor generator is communicated with the annular gap, and the oil in the oil return area of the motor generator flows to the mounting cavity through the annular gap under the action of gravity and falls back to the oil cavity through the total oil return window; And / or, The oil use point in the starting generator includes a stator winding area of the starting generator, and an annular gap is formed between an outer circle of a casing of the starting generator and an inner wall of the intermediate box; The fixed seat is provided with an oil mist nozzle, a spraying direction of the oil mist nozzle is towards the stator winding area of the starting generator, the oil mist nozzle is communicated with a second lubricating oil inlet provided on the intermediate box through a lubricating oil channel on the fixed seat, the lubricating oil pump sends the lubricating oil in the lubricating oil cavity to the second lubricating oil inlet through a pipeline, the lubricating oil passes through the second lubricating oil inlet and the lubricating oil channel in sequence, and then the oil mist formed by the oil mist nozzle through spraying is used to cool the stator winding of the starting generator, and the winding and surrounding components are further cooled by oil splashing during the rotation of the rotor of the starting generator, the lubricating oil after spraying and splashing flows into a lower space in the starting generator under the action of gravity, the lower space in the starting generator is communicated with the annular gap as a lubricating oil return area of the starting generator, and the lubricating oil in the lubricating oil return area of the starting generator flows to the mounting cavity through the annular gap under the action of gravity and falls back to the lubricating oil cavity through the total lubricating oil return window.

8. The integrated hybrid system of claim 5, wherein, The power generator is sealingly connected with a rear end flange surface of the intermediate box through a front end flange of the motor, a flange cavity is formed on the rear side of the fixed seat, and the flange cavity is communicated with the mounting cavity; The casing of the power generator is provided with a third lubricating oil inlet at the top, is provided with a casing lubricating oil return hole near a side of the intermediate box, has an oil collecting area below the inside of the casing, one end of the casing lubricating oil return hole is communicated with the oil collecting area and the other end is opened in the flange cavity, the lubricating oil pump sends the lubricating oil in the lubricating oil cavity to the third lubricating oil inlet through a pipeline, the lubricating oil enters the inside of the casing of the power generator through the third lubricating oil inlet to cool and lubricate the oil use points in the power generator, the lubricating oil flows into the oil collecting area under the action of gravity and is discharged into the flange cavity through the casing lubricating oil return hole, the lubricating oil flows to the mounting cavity through the flange cavity under the action of gravity and falls back to the lubricating oil cavity through the total lubricating oil return window; Preferably, the oil collecting area is arranged near the side of the intermediate box, the inside of the casing of the power generator is provided with a casing inner drainage groove or a lubricating oil return channel in the direction of the oil collecting area from below the oil use points, and a bottom surface of the casing inner drainage groove or the lubricating oil return channel is inclined to the side of the intermediate box relative to the axial direction of the power generator; Preferably, the casing lubricating oil return hole is arranged at a lower half position of the front end of the casing of the power generator; And / or, The oil use point in the starting generator includes a second bearing, and an annular gap is formed between an outer circle of a casing of the starting generator and an inner wall of the intermediate box; The connecting end of the rotating shaft of the generator has a lubricating oil channel and communicates with the oil points of the generator, the coupling assembly has a lubricating oil channel, the rear side of the power turbine output shaft has a lubricating oil channel, the lubricating oil channel of the connecting end of the rotating shaft communicates with the lubricating oil channel of the coupling assembly and the lubricating oil channel of the power turbine output shaft, the power turbine output shaft and the power turbine output shaft sleeve are provided with a plurality of radial oil outlets which communicate with the inside and outside, and the radial oil outlets respectively communicate with the lubricating oil channel of the power turbine output shaft and the second bearing; The housing of the generator is provided with a third lubricating oil inlet, the lubricating oil in the lubricating oil cavity is sent to the third lubricating oil inlet by the lubricating oil pump, the lubricating oil enters the inside of the housing of the generator through the third lubricating oil inlet to cool and lubricate the oil points in the generator, part of the lubricating oil enters the second bearing through the lubricating oil channel, the lubricating oil channel of the connecting end of the rotating shaft, the lubricating oil channel of the coupling assembly, the lubricating oil channel of the power turbine output shaft and a plurality of radial oil outlets to cool and lubricate, the lubricating oil overflowed from the second bearing flows downward along the gap between the bearing seat of the second bearing and the inner wall of the housing under the action of gravity and flows into the lower space in the generator, the lower space in the generator communicates with the annular gap as the oil return area of the generator, the lubricating oil in the oil return area of the generator flows to the mounting cavity through the annular gap under the action of gravity, and falls back to the lubricating oil cavity through the total oil return window.

9. The integrated hybrid system of claim 5, wherein, The engine is sealingly connected with the front flange of the intermediate box body through a connecting flange, and a sealed chamber is formed between the rear side of the engine and the front side of the intermediate box body. The connecting flange is provided with a first lubricating oil channel of the connecting flange, one end of the first lubricating oil channel of the connecting flange communicates with the lubricating pipeline system of the engine itself, and is used for supplying oil to the internal lubricating parts of the engine, the other end of the first lubricating oil channel of the connecting flange communicates with the fourth lubricating oil inlet arranged on the intermediate box body through the lubricating oil channel in the intermediate box body, the lubricating oil in the lubricating oil cavity is sent to the fourth lubricating oil inlet by the lubricating oil pump, the lubricating oil enters the lubricating pipeline system of the engine itself through the fourth lubricating oil inlet and the lubricating oil channel and the first lubricating oil channel of the connecting flange in sequence, and after cooling and lubricating the internal lubricating parts of the engine, the lubricating oil is sent back to the lubricating oil cavity through the oil return port on the engine through the pipeline. The engine is provided with a second lubricating oil passage, one end of the second lubricating oil passage is communicated with a rear bearing for supporting a compressor shaft through a lubricating oil passage in the engine, the other end of the second lubricating oil passage is communicated with the fourth lubricating oil inlet provided on the intermediate box through a lubricating oil passage in the intermediate box, the lubricating oil in the lubricating oil cavity is sent to the fourth lubricating oil inlet through a pipeline by the lubricating oil pump, the lubricating oil enters the rear bearing in sequence through the fourth lubricating oil inlet and the lubricating oil passage and the second lubricating oil passage for cooling and lubrication, the lubricating oil overflowed from the rear bearing flows to a low position area of the engine case close to the intermediate box along a preset drainage path in the engine under the action of gravity, and is discharged to the mounting cavity of the intermediate box through an oil return opening provided in the low position area of the engine case, and falls back to the lubricating oil cavity through the total oil return window.

10. The integrated hybrid system of claim 1, wherein, The generator motor is integrated in a motor and controller integrated system, the motor and controller integrated system comprises: A controller housing, the generator motor is arranged on the controller housing, three-phase winding terminals of the generator motor are arranged at the rear of the generator motor; A motor controller assembly is arranged in the controller housing and below the generator motor, a mounting area for accommodating connecting conductive bars is provided between the rear of the motor controller assembly and the controller housing, the motor controller assembly comprises a controller bottom plate and a power module assembly, the power module assembly comprises a power module and a plurality of connecting conductive bars arranged on the controller bottom plate, a plurality of alternating current terminals of the power module are arranged side by side in the mounting area, each of the alternating current terminals is electrically connected to one connecting conductive bar, each of the connecting conductive bars is bent upward in the mounting area to extend above the mounting area and is electrically connected to a corresponding one of the three-phase winding terminals respectively, and the connecting conductive bars are used for transmitting three-phase alternating current between the power module and the generator motor.

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