Electro-mechanical-hydraulic hybrid power device and power matching method thereof

Abstract

The application provides a kind of electro-mechanical hydraulic hybrid power device and its power matching method, device includes mechanical power component, motor power component and hydraulic power component, the mechanical power component consisting of inner gear ring, planetary gear and sun gear is engaged with the rotor support to realize the volume change of engagement cavity by flow distribution disc, first flow distribution disc, second flow distribution disc and flow distribution end cover ensure the effective flow distribution of mechanical power component arbitrary rotation, with the inner gear ring inlay by rotor support, stator support, center spring, coil and permanent magnet motor power component;The application is connected with mechanical power EA and motor power EB by mechanical power component and motor power component respectively, and the hydraulic power EC is connected by the volume change between teeth, and the practical application control implementation method for realizing hybrid power, multi-stage output and energy recovery is given by power matching mode.The power matching method of the application realizes the effective matching of power by the free combination of power.

Description

Technical Field

[0001] This invention relates to the field of fluid transmission and control, and in particular to an electromechanical-hydraulic hybrid power device and its power matching method. Background Technology

[0002] The machinery industry plays a crucial role in the development of the national economy. With the rapid development of the domestic and international economies, the requirements for simple structure, high integration, and high mechanical efficiency in machinery products are becoming increasingly stringent. Existing machinery products mainly feature a one-to-one match between the power source and the actuator. This leads to problems such as the inability to consider installation space when the mechanism becomes more complex, the inability to achieve energy matching between the power source and the actuator while maintaining high energy efficiency, and the difficulty in achieving direct energy conversion between electromechanical and hydraulic systems.

[0003] This invention addresses the aforementioned technical problems by proposing a novel electro-hydraulic hybrid power device that integrates mechanical transmission, electric motor transmission, and hydraulic transmission. It also proposes power matching methods for key application scenarios, including hybrid hydraulic pump operation, hybrid hydraulic motor operation, and energy recovery operation, with a particular focus on hybrid power and energy recovery. The new product proposed in this invention is more compact in structure, applicable to more operating conditions, and covers a wider range of fields. It offers significant advantages such as energy saving and environmental protection, thus having a wide range of applications. Summary of the Invention

[0004] To address the problems of existing technologies, this invention provides an electromechanical-hydraulic hybrid power device and its power matching method. By structurally integrating mechanical power components, motor power components, and hydraulic power components, the entire device has three power interfaces: a hydraulic energy interface generated by changes in inter-gear volume, a mechanical energy interface composed of a sun gear and output shaft, and an electrical energy interface with the motor power component embedded in the internal gear ring, consisting of a rotor support, stator support, central spring, coil, and permanent magnet. The entire structure is compact and applicable to various working conditions. Furthermore, this invention proposes hybrid hydraulic pump operating condition control methods, hybrid hydraulic motor operating condition control methods, energy recovery operating condition control methods, and mixed-mode operating condition control methods for various applications. By detecting the power status of the external terminals, the three power sources can be freely combined and matched, achieving efficient power matching, significantly improving work efficiency, demonstrating energy-saving and environmental protection advantages, and showing great application potential.

[0005] This invention provides an electromechanical-hydraulic hybrid power device, comprising a mechanical power component, an electric motor power component, and a hydraulic power component. The mechanical power component includes an output shaft, an internal gear ring, planetary gears, a sun gear, and a mechanical lock. A first mounting end of the output shaft is connected to a first mounting end of a distribution end cover; a second mounting end of the output shaft is connected to a second mounting end of the distribution end cover; a third mounting end of the output shaft is connected to a middle mounting end of the sun gear; a fourth mounting end of the output shaft is connected to a middle mounting end of a stator support; a fifth mounting end of the output shaft is connected to a first mounting end of the housing via a first thrust bearing; the external teeth of the sun gear mesh with the internal teeth of the internal gear ring through planetary gears; the first mounting end of the internal gear ring is connected to a second distribution plate and a first distribution plate respectively via second screws; and the second mounting end of the internal gear ring is connected to a second mounting end of the housing via the mechanical lock. The motor power assembly includes a housing, a floating side plate, a rotor support, a stator support, a junction box, a central spring, a coil, and a permanent magnet. The third mounting end of the housing is connected to the third mounting end of the distribution end cover. The first mounting end of the rotor support is connected to the third mounting end of the internal gear ring via a transmission pin. The floating side plate is located at the inner mounting end of the rotor support on the side where it connects to the internal gear ring. The second mounting end of the rotor support is connected to the inner mounting end of the housing. The third mounting end of the rotor support is connected to the sixth mounting end of the output shaft. The fourth mounting end of the rotor support is connected to the mounting end of the permanent magnet. The fifth mounting end of the rotor support is connected to one side of the second thrust bearing via the central spring. The first mounting end of the stator support is connected to the fourth mounting end of the housing via a fourth screw. The second mounting end of the stator support is connected to the fourth mounting end of the rotor support. The third mounting end of the stator support is connected to the mounting end of the coil. The hydraulic power assembly includes a distribution end cover, a second distribution plate, a first distribution plate, and a hydraulic pipe connector. The fourth mounting end of the distribution end cover is provided with a hydraulic pipe connector. The fifth mounting end of the distribution end cover is connected to the middle mounting ends of the second distribution plate and the first distribution plate, respectively. The second distribution plate and the first distribution plate are in contact connection.

[0006] Preferably, in the mechanical power assembly, a first spring retainer and a second bearing are respectively provided between the output shaft and the first mounting end of the distribution end cover; a right-side first sealing ring and a left-side second sealing ring are respectively provided between the output shaft and the second mounting end of the distribution end cover; and a third bearing and a second spring retainer are respectively provided between the fourth mounting end of the output shaft and the middle mounting end of the stator bracket.

[0007] Preferably, in the motor power assembly, a first screw and a second sealing ring are respectively provided between the third mounting end of the housing and the distribution end cover; a fourth sealing ring is provided between the second mounting end of the rotor bracket and the inner mounting end of the housing; a third sealing ring and a second thrust bearing are respectively provided between the third mounting end of the rotor bracket and the sixth mounting end of the output shaft; the junction box is connected to the fifth mounting end of the housing by a third screw; the central spring is located at the seventh mounting end of the output shaft; a third spring retainer, a left fourth bearing, and a right fourth bearing are respectively provided between the second mounting end of the stator bracket and the fourth mounting end of the rotor bracket; and a second sleeve is provided between the left fourth bearing and the right fourth bearing.

[0008] Preferably, a right-side first bearing and a left-side first bearing are respectively provided between the fifth mounting end of the distribution end cover and the middle mounting end of the second distribution plate and the first distribution plate, a first sleeve is provided between the right-side first bearing and the left-side first bearing, and a fifth sealing ring and a sixth sealing ring are respectively provided between the second distribution plate and the first distribution plate.

[0009] Preferably, the inside of the distribution end cover is provided with a low-pressure distribution port and a high-pressure distribution port, and the outside of the distribution end cover is provided with a left mounting port and a right mounting port; the second distribution plate is provided with a low-pressure distribution port and a high-pressure distribution port, and a low-pressure flow channel and a high-pressure flow channel are respectively provided between the low-pressure distribution port and the high-pressure distribution port.

[0010] In another aspect, the present invention provides a power matching method for the aforementioned electromechanical-hydraulic hybrid power device, comprising the following steps:

[0011] S1. The control module performs a self-test and determines the type of input load and output load respectively. Specifically, the mechanical energy interface connecting the output shaft of the mechanical power component to the outside world is identified as mechanical power EA, the electrical energy interface connecting the junction box of the motor power component to the outside world is identified as motor power EB, and the hydraulic energy interface connecting the hydraulic pipe joint of the hydraulic power component to the outside world is identified as hydraulic power EC.

[0012] S2. Select the control power and power matching method according to the input load. The power matching methods include mechanical power EA matching method, electric motor power EB matching method and hydraulic power EC matching method.

[0013] S3. Select different control methods according to the different applications of the construction machinery:

[0014] If the external power source of the construction machinery is mechanical power EA, then the energy-saving mode control method of the mechanical power EA matching method shall be selected;

[0015] If the external load of the construction machinery is mechanical power EA, then the drive mode control method of the mechanical power EA matching method shall be selected;

[0016] If the external load of the construction machinery is a motor power EB, then the energy-saving mode control method of the motor power EB matching method shall be selected;

[0017] If the external power source of the construction machinery is an electric motor EB, then the drive mode control method of the electric motor EB matching method shall be selected.

[0018] If the external load of the construction machinery is a hydraulic power EC, then the pump mode control method of the hydraulic power EC matching method shall be selected;

[0019] If the external power source for the construction machinery is a hydraulic power source (EC), then the motor mode control method of the hydraulic power source (EC) matching method should be selected.

[0020] Preferably, the control steps of the drive mode in the mechanical power EA matching method include:

[0021] When the construction machinery is connected to a low-load traveling load, the motor power EB is required to provide it. The specific process is as follows: the hydraulic pipe joint is connected to the oil tank, and at the same time the mechanical lock of the motor power component is in a disabled state. The motor power EB is transmitted to the internal gear ring through the rotor bracket and the transmission pin in sequence. At this time, the internal gear ring drives the planetary gears that mesh with it to rotate. The planetary gears are driven through the sun gear that meshes with them, thereby realizing the output of mechanical power EA.

[0022] When the construction machinery is connected to a medium or heavy-duty traveling load, the hydraulic power EC is required to provide it. The specific process is as follows: the mechanical lock that makes the motor power component rotate is in an effective state, and the hydraulic power EC rotates through the meshing of the planetary gear and the sun gear, thereby realizing the output of mechanical power EA.

[0023] When the construction machinery is subjected to heavy external loads, it is necessary to use a combination of electric motor power EB and hydraulic power EC for power supply. The specific process is as follows: the mechanical lock that makes the electric motor power component rotate is in a disabled state, the electric motor power EB is transmitted to the internal gear ring through the transmission pin, and at the same time, under the drive of the hydraulic power EC, the planetary gears mesh with the internal gear ring and the sun gear respectively to realize the relative rotation of the gear set, thereby realizing the output of mechanical power EA.

[0024] Preferably, the pump mode control steps of the hydraulic power EC matching method include:

[0025] When the construction machinery is connected to a light-load actuator, the motor power EB is required to provide it. The specific process is as follows: the mechanical lock that makes the motor power component rotate is in a disabled state. The motor power EB is transmitted to the internal gear ring through the transmission pin. The internal gear ring drives the planetary gear that meshes with it to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

[0026] When the construction machinery is connected to a medium- or heavy-duty actuator, mechanical power EA is required. The specific process is as follows: the mechanical lock that makes the motor power component rotate is in an effective state, the internal gear ring is in a locked state, and at this time the mechanical power EA is output to the sun gear. The sun gear drives the planetary gears that mesh with it to achieve relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

[0027] When the construction machinery is operating under heavy load, it needs to be powered by a combination of electric motor power EB and mechanical power EA. The specific process is as follows: the mechanical lock that makes the electric motor power component rotate is in a disabled state, the mechanical power EA is output to the sun gear, and at the same time the electric motor power EB is transmitted to the internal gear ring through the transmission pin. At this time, the planetary gears mesh with the internal gear ring and the sun gear respectively to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

[0028] Preferably, the control steps for mechanical energy recovery in the energy-saving mode of the mechanical power EA matching method include:

[0029] If series energy recovery is adopted, this device is connected in series with the external output power end. The power is transmitted to the sun gear through the input shaft in the mechanical power component. The sun gear meshes with the planet gear to generate hydraulic power EC. By controlling the opening state of the mechanical lock that makes the motor power component rotate, the transmission pin is connected to the rotor support, thereby realizing the energy recovery of the motor power EB.

[0030] If parallel energy recovery is adopted, this device is connected in parallel with the external output power terminal through the transfer case. The mechanical lock on the internal gear ring that causes the motor power component to rotate is in a disabled state, thereby driving the motor power component to recover energy. If the external output power requires power compensation, the stored motor power EB is used through the junction box to drive the motor power component as power to drive the internal gear ring, thereby achieving secondary utilization of energy.

[0031] Preferably, the mixed-mode control method includes connecting the external load to any one of the mechanical power EA, the electric motor power EB, and the hydraulic power EC, and connecting the external load to any two of the mechanical power EA, the electric motor power EB, and the hydraulic power EC.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] 1. The electromechanical-hydraulic hybrid power device of this invention is compact in structure and integrates the advantages of a planetary gearbox, a non-circular planetary gear pump motor, and an electric motor. It proposes hybrid hydraulic pump operating condition control methods, hybrid hydraulic motor operating condition control methods, energy recovery operating condition control methods, and mixed-mode operating condition control methods for various product applications. Specifically, the gears of the planetary gearbox and the non-circular planetary gear pump motor are integrated. The left side of the gear set achieves high and low pressure fluid distribution through a double distribution plate and distribution end cover. The right side of the internal gear ring in the gear set is connected to an integrated motor rotor bracket via a transmission pin.

[0034] 2. The electromechanical-hydraulic hybrid power device of the present invention has three power interfaces: a hydraulic energy interface generated by the change of inter-tooth volume, a mechanical energy interface composed of the sun gear and the output shaft, and an internally integrated motor interface driven by the rotor support. Therefore, it is applicable to a wide range of working conditions. At the same time, reasonable combination and matching of power can achieve efficient power matching, greatly improve working efficiency, give full play to the advantages of energy saving and environmental protection, and has great application prospects.

[0035] 3. This invention proposes a control method for hybrid hydraulic pump operation: the mechanical energy interface composed of the sun gear and the output shaft is the first input end connected to the engine; the internal integrated motor composed of the internal gear ring connected to the rotor support through the transmission pin is the second input end; and the hydraulic energy interface generated by the change in the inter-tooth volume is the first output end. Through external power control, the two power sources can be driven individually or in combination, thereby realizing the hybrid drive operation of the hydraulic pump.

[0036] 4. This invention proposes a control method for hybrid hydraulic motors: the hydraulic energy interface generated by the change in the inter-gear volume is the first input end connected to high-pressure oil, the mechanical energy interface composed of the sun gear and the output shaft is the first output end, and the integrated motor composed of the internal gear ring connected to the rotor support through the transmission pin is the second output end. This can realize the mechanical output mode of high speed and low torque of the sun gear and the electronic output mode composed of the internal gear ring and the generator.

[0037] 5. This invention proposes control methods for energy recovery operation: Series energy recovery control connects this device in series after the hydraulic main pump, controlling the engine to operate within its optimal economic speed range. When the load on the hydraulic main pump is lower than the engine's real-time power, the engine's remaining mechanical power is transmitted to the sun gear via the input shaft. The sun gear drives the planetary gears to rotate, and the energy produced by the hydraulic system provides auxiliary power oil. The internal gear ring drives the built-in motor for energy recovery, achieving a reasonable allocation of energy between the two to fully utilize the engine's energy. Parallel energy recovery control connects this product in parallel with the hydraulic main pump via a transfer case. The hydraulic output provides pilot oil to the hydraulic system, while the mechanical lock on the internal gear ring is disabled, thereby driving the built-in motor for energy recovery. When the engine is starting or in a non-surplus energy condition, the power supply drives the built-in motor as power, thus storing and reusing energy to supplement the system's power.

[0038] 6. This invention proposes a control method for mixed-operation conditions: high-pressure oil provides hydraulic energy, power supply provides electrical energy to drive the built-in motor to provide mechanical energy, and an external output shaft connects to the mechanical energy. The combination of the input and output ends can be selected by the external load, which can realize any number of power inputs or power outputs. Attached Figure Description

[0039] Figure 1 This is an overall structural diagram of the electromechanical-hydraulic hybrid power device of the present invention;

[0040] Figure 2 This is a cross-sectional view (AA) of the electromechanical-hydraulic hybrid power device of the present invention;

[0041] Figure 3 This is a BB cross-sectional view of the electromechanical-hydraulic hybrid power device of the present invention;

[0042] Figure 4 This is a cross-sectional view of the structure of the second distribution plate in the electromechanical-hydraulic hybrid power device of the present invention;

[0043] Figure 5 This is a flowchart of the mechanical power EA matching process in the power matching method based on the electromechanical-hydraulic hybrid power device of the present invention.

[0044] Key reference numerals:

[0045] First screw 1, right first bearing 201, first sleeve 3, left first bearing 202, right first sealing ring 401, left second sealing ring 402, first spring retainer 5, output shaft 6, second bearing 701, distribution end cover 8, second distribution plate 9, first distribution plate 10, second screw 11, second sealing ring 12, hydraulic pipe joint 13, housing 14, internal gear ring 15, planetary gear 16, sun gear 17, drive pin 18, floating side plate 19, rotor support 20, stator support 21, junction box 22, third screw 23, third bearing 702, fourth screw 24, second spring retainer 25, first thrust bearing 26, Third sealing ring; 27, Second thrust bearing; 28, Center spring; 29, Third spring retainer ring; 30, Left fourth bearing 3101; Second sleeve; 32, Coil; 33, Permanent magnet; 34, Fourth sealing ring; 35, Right fourth bearing 3102; Mechanical lock; 36, Fifth sealing ring; 37, Sixth sealing ring; 38, Low-pressure distribution port 801 of distribution end cover; High-pressure distribution port 802 of distribution end cover; Left mounting port 803 of distribution end cover; Right mounting port 804 of distribution end cover; Low-pressure distribution port 901 of second distribution plate; High-pressure distribution port 902 of second distribution plate; Low-pressure flow channel 903 of second distribution plate; High-pressure flow channel 904 of second distribution plate. Detailed Implementation

[0046] To fully describe the technical content, structural features, objectives, and effects of this invention, a detailed description will be provided below in conjunction with the accompanying drawings.

[0047] Electromechanical-hydraulic hybrid power systems, such as Figure 1 As shown, it includes a mechanical power component, an electric motor power component, and a hydraulic power component.

[0048] Mechanical power components, such as Figure 1 and Figure 2 As shown, it includes an output shaft 6, an internal gear ring 15, planetary gears 16, a sun gear 17, and a mechanical lock 36. The internal gear ring 15 and the planetary gears 16 achieve power transmission and radial sealing through gear meshing. The planetary gears 16 and the sun gear 17 achieve power transmission and radial sealing through gear meshing. The gear set composed of the internal gear ring 15, planetary gears 16, and sun gear 17 achieves sealing on both sides of the planetary gear set through the first distribution plate 10, the rotor support 20, and the floating side plate 19, respectively.

[0049] The first mounting end of the output shaft 6 is connected to the first mounting end of the distribution end cover 8 in sequence via the first spring retainer 5 and the second bearing 701. The second mounting end of the output shaft 6 is connected to the second mounting end of the distribution end cover 8 in sequence via the right first sealing ring 401 and the left second sealing ring 402. The third mounting end of the output shaft 6 is connected to the middle mounting end of the sun gear 17 via a spline. The fourth mounting end of the output shaft 6 is connected to the middle mounting end of the stator bracket 21 via the third bearing 702 and the second spring retainer 25, thereby realizing the double-sided support and rotation of the output shaft 6. The fifth mounting end of the output shaft 6 is connected to the first mounting end of the housing 14 via the first thrust bearing 26.

[0050] The external teeth of the sun gear 17 mesh with the internal teeth of the planet gear 16 and the internal gear ring 15. The first mounting end of the internal gear ring 15 is connected to the second distribution plate 9 and the first distribution plate 10 respectively by the second screw 11. The second mounting end of the internal gear ring 15 is connected to the second mounting end of the housing 14 by the mechanical lock 36. The rotor support 20 and the floating side plate 19 are pressed tightly against the right side of the internal gear ring 15 by the first thrust bearing 26, the second thrust bearing 28 and the central spring 29 connected to the output shaft 6. The second distribution plate 9 and the first distribution plate 10 are fixed to the internal gear ring 15 by the second screw 11, and the second distribution plate 9 and the first distribution plate 10 are pressed tightly against the distribution end cover 8.

[0051] Specifically, the rotation state of the internal gear ring 15 is controlled by adjusting the mechanical lock 36. When the internal gear ring 15 is fixed, the second distribution plate 9 and the distribution end cover 8 are in a static pressed state; when the internal gear ring 15 rotates, the second distribution plate 9 and the distribution end cover 8 are in a relative rotating state. The combination of the double distribution plate and the distribution end cover 8 achieves accurate and efficient distribution under various structural rotations, while the central spring 29 and the double distribution plate achieve effective axial sealing and dynamic wear compensation.

[0052] Motor power components, such as Figure 1 As shown, the assembly includes a housing 14, a floating side plate 19, a rotor support 20, a stator support 21, a junction box 22, a central spring 29, a coil 33, and a permanent magnet 34. The third mounting end of the housing 14 is sealed to the third mounting end of the distribution end cover 8 via a first screw 1 and a second sealing ring 12. The first mounting end of the rotor support 20 is connected to the third mounting end of the internal gear ring 15 via a transmission pin 18. The transmission pin 18 enables power transmission between the rotor support 20 and the internal gear ring 15, thereby ensuring the airtightness of the gear set volume. The floating side plate 19 is located at the internal mounting end on the side where the rotor support 20 and the internal gear ring 15 are connected. The second mounting end of the rotor support 20 is connected to the internal mounting end of the housing 14 via a fourth sealing ring 35. The third mounting end of the rotor support 20 is connected to the sixth mounting end of the output shaft 6 via a third sealing ring 27 and a second thrust bearing 28. The fourth mounting end of the rotor support 20 is connected to the mounting end of the permanent magnet 34.

[0053] The fifth mounting end of the rotor support 20 is connected to one side of the central spring 29 and the second thrust bearing 28. The central spring 29 is located at the seventh mounting end of the output shaft 6. The preload of the central spring 29 and the first screw 1 ensures the axial sealing of the gear set consisting of the internal gear ring 15, planetary gear 16, and sun gear 17 during meshing. The first mounting end of the stator support 21 is connected to the fourth mounting end of the housing 14 via the fourth screw 24. The junction box 22 is connected to the fifth mounting end of the housing 14 via the third screw 23. The second mounting end of the stator support 21 is connected to the fourth mounting end of the rotor support 20 via the third spring retainer 30, the left fourth bearing 3101, and the right fourth bearing 3102. A second sleeve 32 is provided between the left fourth bearing 3101 and the right fourth bearing 3102, thereby realizing the relative rotation of the rotor support 20 and the stator support 21. The third mounting end of the stator support 21 is connected to the mounting end of the coil 33. The relative rotation of the permanent magnet 34 and the coil 33 realizes the energy exchange between the junction box 22 and the outside world.

[0054] Hydraulic power components, such as Figure 1 As shown, the device includes a distribution end cover 8, a second distribution plate 9, a first distribution plate 10, and a hydraulic pipe connector 13. The first distribution plate 10, which contacts both sides of the gear set, and the floating side plate 19 are both made of special wear-resistant materials and have high-pressure grooves on the back to improve the pressure distribution of the contact surface and enhance sealing and contact performance. The fourth mounting end of the distribution end cover 8 is provided with a hydraulic pipe connector 13 to realize the communication between the internal oil and the external oil. The fifth mounting end of the distribution end cover 8 is connected to the middle mounting ends of the second distribution plate 9 and the first distribution plate 10 through the right first bearing 201 and the left first bearing 202, respectively. One side of the second distribution plate 9, which contacts the distribution surface of the distribution end cover 8, is plated with a wear-resistant material. A first sleeve 3 is provided between the right first bearing 201 and the left first bearing 202. The second distribution plate 9 is connected to the first distribution plate 10 through the fifth sealing ring 37 and the sixth sealing ring 38. The distribution end cover 8 is equipped with a right first bearing 201 and a left first bearing 202 via a first sleeve 3, thereby enabling relative rotation with the distribution end cover 8.

[0055] In a preferred embodiment of the present invention, such as Figure 3 As shown, the inside of the distribution end cover 8 is provided with a low-pressure distribution port 801 and a high-pressure distribution port 802, respectively, to achieve effective distribution with the second distribution plate 9 through rotation and sliding. The outside of the distribution end cover is provided with a left-side mounting port 803 and a right-side mounting port 804, respectively. Figure 4As shown, the second distribution plate 9 is provided with a low-pressure distribution port 901 and a high-pressure distribution port 902, and a low-pressure flow channel 903 and a high-pressure flow channel 904 are provided between the low-pressure distribution port and the high-pressure distribution port, thereby realizing the radial stratification of the pressure distribution of the first distribution plate 10.

[0056] Furthermore, in order to ensure the sealing performance of the device of the present invention, the output shaft 6 is sealed to the distribution end cover 8 and the housing 14 by the right first sealing ring 401, the left second sealing ring 402 and the left second sealing ring 12 respectively; the first distribution plate 10 and the second distribution plate 9 are sealed by the fifth sealing ring 37 and the sixth sealing ring 38; the rotor support 20 is sealed to the output shaft 6 and the housing by the third sealing ring 27 and the fourth sealing ring 35 respectively.

[0057] A second aspect of the present invention provides a power matching method based on an electromechanical-hydraulic hybrid power system, such as... Figure 5 As shown, it includes the following steps:

[0058] S1. The control module performs a self-test and determines the input load and output load types respectively. Specifically, the mechanical energy interface connecting the output shaft 6 of the mechanical power component to the outside world is identified as mechanical power EA, the electrical energy interface connecting the junction box 22 of the motor power component to the outside world is identified as motor power EB, and the hydraulic energy interface connecting the hydraulic pipe joint 13 of the hydraulic power component to the outside world is identified as hydraulic power EC.

[0059] S2. Select the control power and power matching method according to the input load. The power matching methods include mechanical power EA matching method, electric motor power EB matching method and hydraulic power EC matching method.

[0060] S3. Select different control methods according to the different applications of the construction machinery:

[0061] If the external power source of the construction machinery is mechanical power EA, then the energy-saving mode control method of the mechanical power EA matching method should be selected.

[0062] If the external load of the construction machinery is mechanical power EA, then the drive mode control method of the mechanical power EA matching method is selected.

[0063] If the external load of the construction machinery is a motor power EB, then the energy-saving mode control method of the motor power EB matching method should be selected.

[0064] If the external power source for the construction machinery is an electric motor EB, then the drive mode control method of the electric motor EB matching method should be selected.

[0065] If the external load of the construction machinery is a hydraulic power EC, then the pump mode control method of the hydraulic power EC matching method should be selected.

[0066] If the external power source for the construction machinery is a hydraulic power source (EC), then the motor mode control method of the hydraulic power source (EC) matching method should be selected.

[0067] Specifically, the mixed-mode control method includes connecting the external load to any one of the mechanical power EA, the electric motor power EB, and the hydraulic power EC, or connecting the external load to any two of the mechanical power EA, the electric motor power EB, and the hydraulic power EC. The control is carried out in a one-to-one, one-to-many, or many-to-one manner through combination. Specifically, it is divided into mechanical energy-electric recovery mode, hydraulic energy-electric recovery mode, mechanical energy and electrical energy hybrid drive-type electric recovery mode, electric energy drive-type energy-saving drive mode, and hydraulic energy drive-type energy-charging hydraulic drive mode.

[0068] Preferably, the specific steps of the drive mode of the mechanical power EA matching method include:

[0069] If the construction machinery is connected to a light-load actuator, the motor power EB is required to provide it. The specific process is as follows: the mechanical lock 36 that makes the motor power component rotate is in a disabled state, the motor power EB is transmitted to the internal gear ring 15 through the transmission pin 18, the internal gear ring 15 drives the planetary gear 16 that meshes with it to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

[0070] If the construction machinery is connected to a heavy-duty actuator, mechanical power EA is required. The specific process is as follows: the mechanical lock 36 that makes the motor power component rotate is in an effective state, and the internal gear ring 15 is in a locked state. At this time, mechanical power EA is output to the sun gear 17. The sun gear 17 drives the planet gear 16 that meshes with it to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

[0071] If the construction machinery is operating beyond its load capacity, it needs to be powered by a combination of electric motor power EB and mechanical power EA. The specific process is as follows: the mechanical lock 36 that makes the electric motor power component rotate is in a disabled state, the mechanical power EA is output to the sun gear 17, and at the same time the electric motor power EB is transmitted to the internal gear ring 15 through the transmission pin 18. At this time, the planetary gear 16 meshes with the internal gear ring 15 and the sun gear 17 respectively to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

[0072] In a preferred embodiment, the specific steps of the pump mode in the hydraulic power EC matching method include:

[0073] If the construction machinery is connected to a low-load traveling machine, the motor power EB needs to be provided. The specific process is as follows: connect the hydraulic pipe connector 13 to the oil tank, and at the same time disable the mechanical lock 36 of the motor power component. The motor power EB is transmitted to the internal gear ring 15 through the rotor bracket 20 and the transmission pin 18 in sequence. At this time, the internal gear ring 15 drives the planetary gear 16 meshing with it to rotate. The planetary gear 16 is driven through the sun gear 17 meshing with it, thereby realizing the output of mechanical power EA.

[0074] If the construction machinery is connected to a heavy-duty mobile machine, the hydraulic power EC is required to provide it. The specific process is as follows: the mechanical lock 36 that makes the motor power component rotate is in an effective state, and the hydraulic power EC rotates through the engagement of the planetary gear 16 and the sun gear 17, thereby realizing the output of the mechanical power EA.

[0075] If the construction machinery is operating beyond its load capacity, it needs to be powered by a combination of electric motor power EB and hydraulic power EC. The specific process is as follows: the mechanical lock 36 that makes the electric motor power component rotate is in a disabled state. The electric motor power EB is transmitted to the internal gear ring 15 through the transmission pin 18. At the same time, under the drive of the hydraulic power EC, the planetary gear 16 meshes with the internal gear ring 15 and the sun gear 17 respectively to realize the relative rotation of the gear set, thereby realizing the output of mechanical power EA.

[0076] The specific steps of the mechanical energy recovery process in the energy-saving mode of the mechanical power EA matching method are as follows:

[0077] If series energy recovery is adopted, this device is connected in series with the external output power end, and the engine is controlled to work in the optimal economic speed range. The remaining mechanical power of the engine is transmitted to the sun gear 17 through the input shaft 6 in the mechanical power component. The sun gear 17 meshes with the planet gear 16 to generate hydraulic power EC. By controlling the opening state of the mechanical lock 36 that makes the motor power component rotate, the transmission pin 18 is connected to the rotor support 20, thereby realizing the energy recovery of the motor power EB. The reasonable allocation of the two realizes the full utilization of the engine energy.

[0078] If parallel energy recovery is adopted, this device is connected in parallel with the external output power end through the transfer case. The hydraulic output end provides the hydraulic system pilot oil to improve energy utilization. The mechanical lock 36 on the internal gear ring 15 that causes the motor power component to rotate is in a disabled state, thereby driving the motor power component to recover energy. When the external output power needs power compensation, the stored motor power EB is used through the junction box 22 to drive the motor power component as power to drive the internal gear ring 15, thereby achieving secondary utilization of energy.

[0079] The following describes in further detail an electromechanical-hydraulic hybrid power device and power matching method of the present invention with reference to embodiments:

[0080] Power matching methods based on electromechanical-hydraulic hybrid power systems, such as Figure 5 As shown, it includes the following steps:

[0081] S1. The control module performs a self-test and determines the input and output load types respectively. The mechanical energy interface connecting the sun gear 17 in the mechanical power assembly to the external environment via the spline-connected output shaft 6 is identified as mechanical power EA. In the motor power assembly, the internal gear ring 15 transmits power to the rotor support 20 via the transmission pin 18. The rotor support is embedded with a permanent magnet 34, and the coil 33 is fixed on the stator support 21, thus realizing the function of an integrated motor. Therefore, the electrical energy interface connecting the junction box 22 in the motor power assembly to the external environment is identified as motor power EB. Since the hydraulic energy generated by the change in the inter-tooth volume of the sun gear 17, planet gear 16 and internal gear ring 15 forms a fluid power source through the first distribution plate 10, the second distribution plate 9, the distribution end cover 8 and the hydraulic pipe joint 13, the hydraulic energy interface connecting the hydraulic pipe joint 13 in the hydraulic power assembly to the external environment is identified as hydraulic power EC.

[0082] S2. Select the control power and power matching method according to the input load. The power matching methods include mechanical power EA matching method, electric motor power EB matching method and hydraulic power EC matching method.

[0083] When the host machine identifies the main power source EA of the construction machinery, the classification of the electric motor power EB and hydraulic power EC is similar to that of the mechanical power EA. The operating mode of the mechanical power EA is identified, with the first type indicating that the mechanical power EA is the main driving force, and the second type indicating that the mechanical power EA is the load force. The load type of the mechanical power EA is also identified, with the first type indicating light load, the second type indicating medium to heavy load, and the third type indicating heavy load. When providing motion for different load types, if the mechanical power EA is the main driving force, it is the input load, and the electric motor power EB and hydraulic power EC are the loads connected to the undetermined output terminals. If the mechanical power EA is the main driving force, it is the output load, and the electric motor power EB and hydraulic power EC are the power connected to the undetermined input terminals. Through power matching, the mechanical power EA can provide power to the individual or combined loads of the electric motor power EB or hydraulic power EC; or, through power matching, the electric motor power EB or hydraulic power EC can provide power to the load mechanical power EA, either individually or in combination.

[0084] S3. Select different control methods according to the different applications of the construction machinery:

[0085] If the external load of the construction machinery is hydraulic power EC, the pump mode of the hydraulic power EC matching method is executed. When the construction machinery is connected to a light-load actuator, the required output hydraulic power EC is smaller. Assuming that the mechanical power EA is connected to the engine and simultaneously provides power to the electric motor power EB, the power of the light-load actuator is relatively small, so the electric motor power component is used to drive it. By unloading the mechanical power EA, the mechanical power input is stopped and the rotation is restricted by an external mechanical device. The sun gear 17 is in a locked state, the adjusting mechanical lock 36 is in a disabled state, and the electric motor power EB provides a predetermined input power through the power drive and is transmitted to the internal gear ring 15 by the transmission pin 18. The planetary gear 16 achieves relative rotation of the gear set by meshing with the internal gear ring 15, thereby realizing the hydraulic energy output of the hydraulic power EC.

[0086] If the external load of the construction machinery is a hydraulic power EC, the pump mode of the hydraulic power EC matching method is executed. When the construction machinery is connected to a medium- or heavy-duty actuator, the medium- or heavy-duty actuator has a large power and the engine is used for power supply. At this time, the mechanical power EA is connected to the engine, the mechanical lock 36 is in an effective state, and the internal gear ring 15 is in a locked state. At this time, the mechanical power EA is output to the sun gear 17, and the planetary gears 16 achieve relative rotation of the gear set through meshing with the sun gear 17, thereby realizing the hydraulic energy output of the hydraulic power EC.

[0087] If the external load of the construction machinery is hydraulic power EC, the pump mode of the hydraulic power EC matching method is executed. When the construction machinery is running under heavy load, the actuator power is very large. It is proposed that the engine and the integrated motor are supplied with mixed power. Then the motor power EB and the mechanical power EA are supplied with mixed power. When the engine is started, the mechanical power EA is output to the sun gear 17. At the same time, the predetermined input power is provided through the power drive and transmitted to the internal gear ring 15 by the motor power EB. The mechanical lock 36 is in the inactive state. The two powers are superimposed to provide greater power to the gear set meshing. The planetary gear 16 meshes with the internal gear ring 15 and the sun gear 17 respectively to realize the relative rotation of the gear set, thereby realizing the excess output of hydraulic energy of the hydraulic power EC.

[0088] If the external load of the construction machinery is mechanical power EA, the drive mode of the mechanical power EA matching method is executed. When the construction machinery is connected to a low-load traveling load, the power of the actuator is relatively small, so the motor power EB is required to provide it. The inlet and outlet of the hydraulic pipe joint 13 are connected to the oil tank. At this time, the mechanical lock 36 is in a disabled state, the internal gear ring 15 is in a free rotation state, and the motor power component is transmitted to the internal gear ring 15 through the rotor bracket 20 and the transmission pin 18. The internal gear ring 15 meshes with the planetary gear 16, and the planetary gear 16 meshes with the sun gear 17 to realize the power output of the output shaft 6.

[0089] If the external load of the construction machinery is mechanical power EA, the drive mode of the mechanical power EA matching method is executed. When the construction machinery is connected to a medium- or heavy-duty traveling load, the actuator has a large power and is powered by the hydraulic power component. At this time, the mechanical lock 36 is in an effective state, the internal gear ring 15 is in a prohibited rotation state, and hydraulic energy is connected through the hydraulic power EC. Under the drive of the hydraulic energy, the planetary gear 16 meshes and rotates with the sun gear 17, and the output shaft 6 transmits mechanical energy to the load end.

[0090] If the external load of the construction machinery is mechanical power EA, the drive mode of the mechanical power EA matching method is executed. When the construction machinery is subjected to a heavy load, the actuator power is very high, so the motor power component and the hydraulic power component are used for mixed drive power supply. At this time, the mechanical lock 36 is in a disabled state, and the internal gear ring 15 is in a free rotation state. The mechanical energy generated by the motor power component is transmitted to the internal gear ring 15 through the transmission pin 18. At the same time, under the drive of hydraulic energy, the planetary gear 16 meshes with the internal gear ring 15 and the sun gear 17 respectively to realize the relative rotation of the gear set, thereby realizing the stable output of the output shaft 6. In the motor operation mode, the running state of the internal gear ring 15 can be controlled by the motor power component, thereby realizing the replenishment and recovery of hydraulic energy.

[0091] If the external power source for the construction machinery is mechanical power EA, the energy-saving mode of the mechanical power EA matching method is executed. Here, we only take mechanical energy recovery as an example for detailed analysis. If the construction machinery needs to recover the energy of the engine's surplus power, then the energy recovery operating condition control method is selected. When the device of this invention is used in combination with the hydraulic main pump and the engine, the economic factors such as the operation of the construction machinery engine are considered, and the engine is controlled to operate in the optimal economic power output range.

[0092] If series energy recovery is adopted, this device is connected in series with the external output power end to control the engine to work in the optimal economic speed range. When the load of the hydraulic main pump is lower than the real-time power of the engine, the remaining mechanical power of the engine is transmitted to the sun gear 17 through the input shaft 6. The sun gear 17 meshes with the planet gears 16 to generate hydraulic energy, which can provide power for the auxiliary hydraulic system. The planet gears 16 mesh with the internal gear ring 15. By controlling the opening state of the mechanical lock 36, the transmission pin 18 can be connected to the rotor support 20, thereby enabling the motor power component to provide energy. The motor power component recovers energy in the form of electrical energy through the generator operation. The reasonable allocation of the two achieves full utilization of the engine energy.

[0093] If parallel energy recovery is adopted, this device is connected in parallel with the external output power end through the transfer case. The hydraulic output end provides pilot oil to the hydraulic system to improve energy utilization. The excess energy of the engine is recovered by controlling the opening of the mechanical lock 36. At the same time, the motor power component that stores electrical energy through the junction box 22 acts on the internal gear ring 15 to perform secondary energy utilization in the case of system power failure, fault, and pure electric drive mode of the auxiliary system, thereby improving energy utilization.

[0094] The control methods for mixed-operation conditions mainly include mechanical energy recovery mode, hydraulic energy recovery mode, mechanical energy and electrical energy driven recovery mode, electrical energy driven energy-saving drive mode, and hydraulic energy driven charged hydraulic drive mode. The main control methods are uniformly described in the following manner:

[0095] Mechanical power (EA) is connected to mechanical energy, electric power (EB) is connected to electrical energy, and hydraulic power (EC) is connected to hydraulic energy. These can be combined in one-to-one, one-to-many, or many-to-one manner through load and power combinations.

[0096] The specific pairing method is as follows: after the hydraulic power EC is connected to the inlet and outlet of the hydraulic pipe joint 13, the mechanical power EA and the electric motor power EB are mutually converted; after the mechanical power EA is fixed on the output shaft 6, the electric motor power EB and the hydraulic power EC are mutually converted; after the electric motor power EB is fixed on the rotor support 20, the mechanical power EA and the hydraulic power EC are mutually converted.

[0097] The specific one-to-many configuration is as follows: Mechanical power EA, after receiving mechanical energy, drives the gear set composed of internal gear ring 15, planetary gears 16, and sun gear 17. Mechanical energy drives hydraulic power EC as a hydraulic motor and drives motor power EB as a generator. Similarly, motor power EB, as a motor, drives the gear set composed of internal gear ring 15, planetary gears 16, and sun gear 17. Electrical energy drives hydraulic power EC as a hydraulic motor and drives mechanical power EA as an output mechanical energy. Similarly, hydraulic power EC, as a hydraulic pump, drives the gear set composed of internal gear ring 15, planetary gears 16, and sun gear 17. Hydraulic energy drives mechanical power EA as an output mechanical energy and drives motor power EB as a generator.

[0098] The specific configuration of the multiple-to-one pairing is as follows: Mechanical power EA receives mechanical energy and transmits it to the sun gear 17 through the output shaft 6, and drives the motor power EB as a motor to drive the internal gear ring 15 connected to the rotor support 20. The periodic change in the inter-tooth volume of the gear set generates hydraulic energy to drive the hydraulic power EC as a pump. Mechanical power EA receives mechanical energy and transmits it to the sun gear 17 through the output shaft 6, and drives the hydraulic power EC as a hydraulic motor. Together, they drive the gear set composed of the internal gear ring 15, planetary gears 16, and sun gear 17, outputting the combined power to the internal gear ring 15 within the gear set, which in turn drives the motor power EB as a generator. Motor power EB drives the internal gear ring 15 within the gear set, and together with the hydraulic power EC as a hydraulic motor, they drive the gear set, outputting the combined power to the sun gear 17 within the gear set, which in turn drives the mechanical power EA to output mechanical energy through the output shaft 6.

[0099] The above achieves the free allocation and combination of energy from mechanical power (EA), electric motor power (EB), and hydraulic power (EC). The possible combined control methods and control logic are as follows: Figure 5 As shown.

[0100] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A hybrid electromechanical-hydraulic power system, comprising a mechanical power component, an electric motor power component, and a hydraulic power component, characterized in that, The mechanical power assembly includes an output shaft, an internal gear ring, planetary gears, a sun gear, and a mechanical lock. The first mounting end of the output shaft is connected to the first mounting end of the distribution end cover, the second mounting end of the output shaft is connected to the second mounting end of the distribution end cover, the third mounting end of the output shaft is connected to the middle mounting end of the sun gear, the fourth mounting end of the output shaft is connected to the middle mounting end of the stator support, and the fifth mounting end of the output shaft is connected to the first mounting end of the housing via a first thrust bearing. The external teeth of the sun gear mesh with the internal teeth of the internal gear ring through the planetary gears. The first mounting end of the internal gear ring is connected to the second distribution plate and the first distribution plate respectively via a second screw. The second mounting end of the internal gear ring is connected to the second mounting end of the housing via the mechanical lock. The motor power assembly includes a housing, a floating side plate, a rotor support, a stator support, a junction box, a central spring, a coil, and a permanent magnet. The third mounting end of the housing is connected to the third mounting end of the distribution end cover. The first mounting end of the rotor support is connected to the third mounting end of the internal gear ring via a transmission pin. The floating side plate is located at the inner mounting end on the side where the rotor support connects to the internal gear ring. The second mounting end of the rotor support is connected to the inner mounting end of the housing. The third mounting end of the rotor support is connected to the sixth mounting end of the output shaft. The fourth mounting end of the rotor support is connected to the mounting end of the permanent magnet. The fifth mounting end of the rotor support is connected via the central spring and the side of the second thrust bearing. The first mounting end of the stator support is connected to the fourth mounting end of the housing via a fourth screw. The second mounting end of the stator support is connected to the fourth mounting end of the rotor support. The third mounting end of the stator support is connected to the mounting end of the coil. The hydraulic power assembly includes a distribution end cover, a second distribution plate, a first distribution plate, and a hydraulic pipe connector. The fourth mounting end of the distribution end cover is provided with a hydraulic pipe connector, and the fifth mounting end of the distribution end cover is connected to the middle mounting ends of the second distribution plate and the first distribution plate, respectively. The second distribution plate and the first distribution plate are in contact connection. The inside of the distribution end cover is provided with a low-pressure distribution port and a high-pressure distribution port, respectively. The outside of the distribution end cover is provided with a left mounting port and a right mounting port, respectively. The second distribution plate is provided with a low-pressure distribution port and a high-pressure distribution port, respectively. A low-pressure flow channel and a high-pressure flow channel are respectively provided between the low-pressure distribution port and the high-pressure distribution port.

2. The electromechanical-hydraulic hybrid power device according to claim 1, characterized in that, In the mechanical power assembly, a first spring retainer and a second bearing are respectively provided between the output shaft and the first mounting end of the distribution end cover; a right-side first sealing ring and a left-side second sealing ring are respectively provided between the output shaft and the second mounting end of the distribution end cover; and a third bearing and a second spring retainer are respectively provided between the fourth mounting end of the output shaft and the middle mounting end of the stator bracket.

3. The electromechanical-hydraulic hybrid power device according to claim 1, characterized in that, In the motor power assembly, a first screw and a second sealing ring are respectively provided between the third mounting end of the housing and the distribution end cover; a fourth sealing ring is provided between the second mounting end of the rotor bracket and the inner mounting end of the housing; a third sealing ring and a second thrust bearing are respectively provided between the third mounting end of the rotor bracket and the sixth mounting end of the output shaft; the junction box is connected to the fifth mounting end of the housing by a third screw; the central spring is located at the seventh mounting end of the output shaft; a third spring retainer, a left fourth bearing, and a right fourth bearing are respectively provided between the second mounting end of the stator bracket and the fourth mounting end of the rotor bracket; and a second sleeve is provided between the left fourth bearing and the right fourth bearing.

4. The electromechanical-hydraulic hybrid power device according to claim 1, characterized in that, The fifth mounting end of the distribution end cover is provided with a right first bearing and a left first bearing between the middle mounting end of the second distribution plate and the first distribution plate, respectively. A first sleeve is provided between the right first bearing and the left first bearing. A fifth sealing ring and a sixth sealing ring are provided between the second distribution plate and the first distribution plate, respectively.

5. A power matching method based on the electromechanical-hydraulic hybrid power device according to any one of claims 1-4, characterized in that, It includes the following steps: S1. The control module performs a self-test and determines the type of input load and output load respectively. Specifically, the mechanical energy interface connecting the output shaft of the mechanical power component to the outside world is identified as mechanical power EA, the electrical energy interface connecting the junction box of the motor power component to the outside world is identified as motor power EB, and the hydraulic energy interface connecting the hydraulic pipe joint of the hydraulic power component to the outside world is identified as hydraulic power EC. S2. Select the control power and power matching method according to the input load. The power matching methods include mechanical power EA matching method, electric motor power EB matching method and hydraulic power EC matching method. S3. Select different control methods according to the different applications of the construction machinery: If the external power source of the construction machinery is mechanical power EA, then the energy-saving mode control method of the mechanical power EA matching method is selected; or if the external load of the construction machinery is mechanical power EA, then the drive mode control method of the mechanical power EA matching method is selected. If the external load of the construction machinery is motor power EB, then the energy-saving mode control method of the motor power EB matching method is selected; or if the external power of the construction machinery is motor power EB, then the drive mode control method of the motor power EB matching method is selected. If the external load of the construction machinery is a hydraulic power EC, then the pump mode control method of the hydraulic power EC matching method is selected; or if the external power of the construction machinery is a hydraulic power EC, then the motor mode control method of the hydraulic power EC matching method is selected.

6. The power matching method based on an electromechanical-hydraulic hybrid power system according to claim 5, characterized in that, The control steps of the drive mode in the mechanical power EA matching method include: When the construction machinery is connected to a low-load traveling load, the motor power EB is required to provide it. The specific process is as follows: the hydraulic pipe joint is connected to the oil tank, and at the same time the mechanical lock of the motor power component is in a disabled state. The motor power EB is transmitted to the internal gear ring through the rotor bracket and the transmission pin in sequence. At this time, the internal gear ring drives the planetary gears that mesh with it to rotate. The planetary gears are driven through the sun gear that meshes with them, thereby realizing the output of mechanical power EA. When the construction machinery is connected to a medium or heavy-duty traveling load, the hydraulic power EC is required to provide it. The specific process is as follows: the mechanical lock that makes the motor power component rotate is in an effective state, and the hydraulic power EC rotates through the meshing of the planetary gear and the sun gear, thereby realizing the output of mechanical power EA. When the construction machinery is subjected to heavy external loads, it is necessary to use a combination of electric motor power EB and hydraulic power EC for power supply. The specific process is as follows: the mechanical lock that makes the electric motor power component rotate is in a disabled state, the electric motor power EB is transmitted to the internal gear ring through the transmission pin, and at the same time, under the drive of the hydraulic power EC, the planetary gears mesh with the internal gear ring and the sun gear respectively to realize the relative rotation of the gear set, thereby realizing the output of mechanical power EA.

7. The power matching method based on an electromechanical-hydraulic hybrid power system according to claim 5, characterized in that, The control steps for the pump mode of the hydraulic power EC matching method include: When the construction machinery is connected to a light-load actuator, the motor power EB is required to provide it. The specific process is as follows: the mechanical lock that makes the motor power component rotate is in a disabled state. The motor power EB is transmitted to the internal gear ring through the transmission pin. The internal gear ring drives the planetary gear that meshes with it to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC. When the construction machinery is connected to a medium- or heavy-duty actuator, mechanical power EA is required. The specific process is as follows: the mechanical lock that makes the motor power component rotate is in an effective state, the internal gear ring is in a locked state, and at this time the mechanical power EA is output to the sun gear. The sun gear drives the planetary gears that mesh with it to achieve relative rotation of the gear set, thereby realizing the output of hydraulic power EC. When the construction machinery is operating under heavy load, it needs to be powered by a combination of electric motor power EB and mechanical power EA. The specific process is as follows: the mechanical lock that makes the electric motor power component rotate is in a disabled state, the mechanical power EA is output to the sun gear, and at the same time the electric motor power EB is transmitted to the internal gear ring through the transmission pin. At this time, the planetary gears mesh with the internal gear ring and the sun gear respectively to realize the relative rotation of the gear set, thereby realizing the output of hydraulic power EC.

8. The power matching method based on an electromechanical-hydraulic hybrid power system according to claim 5, characterized in that, The control steps for mechanical energy recovery in the energy-saving mode of the aforementioned mechanical power EA matching method include: If series energy recovery is adopted, this device is connected in series with the external output power end. The power is transmitted to the sun gear through the input shaft in the mechanical power component. The sun gear meshes with the planet gear to generate hydraulic power EC. By controlling the opening state of the mechanical lock that makes the motor power component rotate, the transmission pin is connected to the rotor support, thereby realizing the energy recovery of the motor power EB. If parallel energy recovery is adopted, this device is connected in parallel with the external output power terminal through the transfer case. The mechanical lock on the internal gear ring that causes the motor power component to rotate is in a disabled state, thereby driving the motor power component to recover energy. If the external output power requires power compensation, the stored motor power EB is used through the junction box to drive the motor power component as power to drive the internal gear ring, thereby achieving secondary utilization of energy.

9. The power matching method based on an electromechanical-hydraulic hybrid power system according to claim 5, characterized in that, The mixed-mode control method includes connecting the external load to any one of the mechanical power EA, the electric motor power EB, and the hydraulic power EC, and connecting the external load to any two of the mechanical power EA, the electric motor power EB, and the hydraulic power EC.

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