Hybrid propulsion system of ship based on diesel engine and electric engine

Abstract

The utility model provides a ship hybrid propulsion system based on a diesel engine and an electric engine, comprising: a diesel engine operation control system for receiving a propulsion control instruction for a propeller and being in communication connection with the diesel engine; the electric engine operation control system is in communication connection with the diesel engine operation control system; the electric engine running speed and power control unit is in communication connection with the electric engine running control system; the electric engine running speed and power control unit is connected with the electric engine, and the electric engine running speed and power control unit is switched between a set speed driving mode and a set power driving mode. And generating a set speed control signal to control the running speed of the electric engine or generating a power control signal to control the running power of the electric engine. Through the arrangement mode disclosed by the invention, the power of the electric engine can be flexibly adjusted.

Description

Technical Field

[0001] The present disclosure relates to a hybrid propulsion system for a ship, in particular to a hybrid propulsion system for a ship based on a diesel engine and an electric engine. Background Art

[0002] Currently, existing technologies for hybrid propulsion of ships generally require the coordination of a diesel engine and an electric motor. Conventional motor control in existing technologies typically utilizes a speed regulation mode. Once the motor reaches a given speed, the motor's internal closed-loop control adjusts the speed to achieve the given speed. For hybrid propulsion, synchronization between the electric and diesel engines requires them to reach the same speed.

[0003] However, with this drive adjustment method, after adjusting the speed of the electric motor, it is often impossible to effectively and flexibly adjust the power of the electric motor. This makes it inconvenient to output flexibly adjustable motor power, nor is it convenient to quickly adjust the power according to the actual operating requirements of the propulsion system. Utility Model Content

[0004] In order to overcome the above-mentioned defects existing in the prior art, the present disclosure provides a hybrid propulsion system for ships based on a diesel engine and an electric engine, comprising: a diesel engine operation control system, the diesel engine operation control system is used to receive propulsion control instructions for a propeller, the diesel engine operation control system is communicatively connected to the diesel engine, and the diesel engine operation control system issues operation control instructions for the diesel engine according to the received propulsion control instructions for the propeller to control the operation of the diesel engine; an electric engine operation control system, the electric engine operation control system is communicatively connected to the diesel engine operation control system, and the electric engine operation control system is used to determine and issue operation control instructions for the electric engine according to the propulsion control instructions for the propeller received by the diesel engine operation control system and the operation control instructions for the diesel engine issued; an electric engine operation speed and power control unit, the electric engine operation speed and power control unit is interconnected with the electric engine operation control system, and the electric engine operation speed and power control unit is connected to the electric engine operation control system. The unit is used to receive operation control instructions for the electric engine from the electric engine operation control system and control the operation of the electric engine; the electric engine operation speed and power control unit is interconnected with the electric engine, and the electric engine operation speed and power control unit is operated to switch between a set speed drive mode and a set power drive mode to generate a set speed control signal to control the operation speed of the electric engine or generate a power control signal to control the operation power of the electric engine; wherein, when the operation speed of the electric engine does not reach the set speed generated by the electric engine operation speed and power control unit, the electric engine operation speed and power control unit is in the set speed drive mode; wherein, when the operation speed of the electric engine reaches the set speed generated by the electric engine operation speed and power control unit, the electric engine operation speed and power control unit controls the electric engine to engage with the diesel engine through the connection assembly, and the electric engine operation speed and power control unit is in the set power drive mode to control the operation power of the electric engine to reach the set power. Accordingly, the electric engine can be switched between the set speed drive mode and the set power drive mode, thereby achieving flexible control of the electric engine and facilitating rapid and flexible adjustment of the power of the electric engine after the speed of the electric engine matches the speed of the diesel engine.

[0005] Furthermore, the propulsion control command for the propeller includes a total speed control command, the operation control command for the diesel engine includes a first speed command, and the operation control command for the electric motor includes a second speed command. The first speed command is determined by the diesel engine operation control system, while the second speed command is determined by the electric motor operation control system based on the actual speed of the diesel engine as fed back by the diesel engine's first speed feedback module. This facilitates matching the speed of the electric motor with the actual speed of the diesel engine, thereby facilitating engagement of the electric motor and the diesel engine via the connection assembly when speed matching occurs.

[0006] Furthermore, the propeller propulsion control command also includes a total power control command, the diesel engine operation control command also includes a first power command, and the electric engine operation control command also includes a second power command. The first power command is determined by the diesel engine operation control system, and the second power command is determined by the electric engine operation control system based on the power difference between the total power control command and the first power command. This facilitates flexible adjustment of the electric engine power to quickly meet the total propeller power requirement.

[0007] Furthermore, the electric motor has a second speed feedback module. The first speed feedback module reports the diesel engine's speed as V1, while the second speed feedback module reports the electric motor's speed as V2. When V1 ≤ V2 ≤ 1.04 V1, the electric motor and diesel engine engage via the connecting assembly. This ensures more uniform and stable engagement between the electric and diesel engines, minimizing the risk of significant structural damage due to a large speed difference between the two engines.

[0008] Furthermore, the propulsion system also includes a remote control system, which is communicatively connected to the diesel engine operation control system via a wired communication module. The remote control system sends communication control signals to the diesel engine via the wired communication module, including propulsion control command signals for the propeller. The diesel engine operation control system also provides feedback to the remote control system via the wired communication module on the diesel engine control system's execution of control of the diesel engine. This facilitates the remote control system's control of the diesel engine and electric motor.

[0009] Furthermore, the remote control system and the electric engine operation control system are communicatively connected via a wired communication module. The electric engine operation control system provides feedback to the remote control system via the wired communication module regarding the electric engine control system's performance of the electric engine control. This allows for immediate feedback on the electric engine control performance and determines whether propeller propulsion speed and propulsion power requirements are met.

[0010] Furthermore, the remote control system is arranged on the bridge of the ship, so that the staff can operate it.

[0011] Furthermore, the propulsion system also includes a display module, which is disposed on the ship's bridge and is communicatively connected to the remote control system. The display module displays, via a display interface, the status of the diesel engine control system's control of the diesel engine, and the status of the electric engine control system's control of the electric engine. This allows personnel to promptly understand the status of the diesel engine control system's control of the electric engine, and the status of the electric engine control system's control of the electric engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the accompanying drawings:

[0013] Figure 1 Schematic diagram showing a hybrid propulsion system for a ship based on a diesel engine and an electric engine.

[0014] Reference Signs List

[0015] 100. Diesel engine operation control system;

[0016] 200. Electric engine operation control system;

[0017] 300. Electric engine operating speed and power control unit;

[0018] 400. Remote control system;

[0019] 500, display module;

[0020] 600, diesel engine;

[0021] 700, electric engine;

[0022] 800. Propeller. DETAILED DESCRIPTION

[0023] The following will describe the technical solutions in the embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other unless there is any conflict.

[0024] In the following detailed description, reference is made to the accompanying drawings that form a part hereof, in which are shown by way of illustration specific embodiments in which the present disclosure may be practiced. With respect to the drawings, directional terms such as "top," "bottom," "inside," "outside," "up," "down," "front," "back," and the like are used with reference to the orientation of the drawings being described. Because the components of the embodiments of the present disclosure can be placed in many different orientations, the directional terms are used for illustration only and are not intended to be limiting. It should be understood that other embodiments may be used and that structural or logical changes may be made without departing from the scope of the present disclosure. Therefore, the following detailed description should not be taken in a limiting sense, and the present disclosure is defined by the claims appended hereto.

[0025] Reference Attachment Figure 1The present disclosure proposes a hybrid propulsion system for ships based on a diesel engine and an electric engine, including: a diesel engine operation control system 100, an electric engine operation control system 200, and an electric engine operation speed and power control unit 300. The diesel engine operation control system 100 is used to receive propulsion control instructions for a propeller 800. The diesel engine operation control system 100 is communicatively connected to the diesel engine 600. The diesel engine operation control system 100 issues operation control instructions to the diesel engine based on the received propeller propulsion control instructions to control the operation of the diesel engine 600. The electric engine operation control system 200 is communicatively connected to the diesel engine operation control system 100. The electric engine operation control system 200 is used to determine and issue operation control instructions for the electric engine based on the propulsion control instructions of the propeller 800 received by the diesel engine operation control system 100 and the operation control instructions for the diesel engine issued; the electric engine operation speed and power control unit 300, the electric engine operation speed and power control unit 300 is communicatively connected to the electric engine operation control system 200. The electric engine operation speed and power control unit 300 is used to receive operation control instructions for the electric engine 700 issued by the electric engine operation control system 200 and control the operation of the electric engine. The electric engine operating speed and power control unit 300 is communicatively connected to the electric engine, and the electric engine operating speed and power control unit 300 is operated to switch between a set speed driving mode and a set power driving mode to generate a set speed control signal to control the operating speed of the electric engine or generate a power control signal to control the operating power of the electric engine; wherein, when the operating speed of the electric engine 700 does not reach the set speed generated by the electric engine operating speed and power control unit 300, the electric engine operating speed and power control unit 300 is in the set speed driving mode; wherein, when the operating speed of the electric engine 700 reaches the set speed generated by the electric engine operating speed and power control unit 300, the electric engine operating speed and power control unit 300 controls the electric engine to engage with the diesel engine through the connecting component, and the electric engine operating speed and power control unit 300 is in the set power driving mode to control the operating power of the electric engine to reach the set power.

[0026] Specifically, “the diesel engine operation control system 100 and the diesel engine 600 are communicatively connected to each other” can be understood as the diesel engine operation control system 100 and the diesel engine 600 are communicatively connected to each other via hard wiring. “The electric engine operation control system 200 and the diesel engine operation control system 100 are communicatively connected to each other” can be understood as the electric engine operation control system 200 and the diesel engine operation control system 100 are communicatively connected to each other via hard wiring.

[0027] Specifically, the propulsion control command for propeller 800 includes a propulsion speed control command for propeller 800 and a propulsion power control command for propeller 800, so as to operate propeller 800 at a predetermined propulsion speed and a predetermined propulsion power. The diesel engine operation control system 100 issues an operation control command for the diesel engine based on the received propulsion control command for propeller 800, thereby controlling the operation of the diesel engine so that propeller 800 ultimately operates at the propulsion speed and propulsion power corresponding to the propulsion control command.

[0028] "The electric engine operation control system 200 is used to determine and issue operation control instructions for the electric engine 200 based on the propulsion control instructions for the propeller 800 received by the diesel engine operation control system 100 and the operation control instructions for the diesel engine issued" can be understood as the electric engine operation control system 200 is used to determine the control of the electric engine operation through the electric engine operation control system 200 based on the difference (specifically including speed difference and power difference) between the propulsion control instructions for the propeller 800 received by the diesel engine operation control system 100 and the operation control instructions for the diesel engine issued, and issue operation control instructions to the electric engine based on the specific speed difference and power difference, so that with the joint cooperation of the diesel engine and the electric engine, the propeller 800 will eventually operate at the propulsion speed and propulsion power corresponding to the propulsion control instruction.

[0029] The ship hybrid propulsion system based on a diesel engine and an electric engine provided by the present invention is adopted. After the diesel engine operation control system 100 receives the propulsion control instruction for the propeller 800, it will control the diesel engine 600 to operate at a predetermined propulsion speed, and detect the actual operating speed of the diesel engine 600 in real time. At this stage, the diesel engine 600 is power-connected to the propeller 800 (the power connection here can be understood as a mechanical transmission connection), and the propeller 800 is driven to rotate by the diesel engine. The electric engine 700 is separated from the propeller 800, and the electric engine operation speed and power control unit 300 controls the electric engine to be in a set speed drive mode. Subsequently, when the rotational speed of the electric engine 700 matches the actual rotational speed of the diesel engine 600, the diesel engine and the electric engine will cooperate through the connecting components to jointly drive the propeller 800 to operate. The electric engine operating speed and power control unit 300 controls the electric engine to be in a set power drive mode so that the electric engine can operate at the set power, so that the operating power of the electric engine and the operating power of the diesel engine can jointly reach the predetermined propulsion power corresponding to the propulsion control instruction of the propeller, thereby facilitating the rapid control of the power of the electric engine and facilitating the rapid achievement of the predetermined propulsion power.

[0030] Specifically, the propulsion system provided by the present invention can facilitate achieving a greater predetermined propulsion power; in addition, it is convenient to operate the power of the ship in a highly flexible manner through speed and power modes during navigation, so as to ensure that the ship can achieve more power options in rescue scenarios or severe weather, so as to ensure the safety of the ship's operation.

[0031] Specifically, by adding the power of the electric engine to the diesel engine, the total power can reach nearly 11,000 kW, wherein the operating power of the diesel engine can be 7,200 kW and the power of the electric engine can be 3,200 kW.

[0032] Specifically, the connecting component is a clutch. Preferably, the clutch is a gearbox clutch. When the electric motor is in a set power drive mode, the gear output shaft of the electric motor and the gear output shaft of the diesel engine are engaged through the clutch, so that the electric motor and the diesel engine jointly drive the propeller.

[0033] Specifically, the propulsion control command for the propeller includes a total speed control command, the operation control command for the diesel engine includes a first speed command, and the operation control command for the electric engine includes a second speed command. The first speed command is determined based on the diesel engine operation control system 100, and the second speed command is determined by the electric engine operation control system 200 based on the actual speed of the diesel engine as fed back by the diesel engine's first speed feedback module. This configuration facilitates matching the speed of the electric engine with the actual speed of the diesel engine, thereby facilitating meshing the electric engine and the diesel engine via the connecting assembly during speed matching. Specifically, with the diesel engine as the primary power component and the electric engine as the auxiliary power component, this configuration ensures synchronization between the primary and auxiliary power components, improves compound distribution accuracy, and ensures more uniform and stable force distribution between the gears of the diesel engine and the electric engine. This reduces the risk of gear damage in the diesel engine and electric engine gearboxes due to uneven force distribution, extends the service life of the gearboxes, and improves the operational stability of the diesel engine and electric engine.

[0034] Specifically, after the predetermined propulsion power is determined, when the operating power of the diesel engine is higher, the corresponding operating power of the electric engine can be lower; when the operating power of the diesel engine is lower, the corresponding operating power of the electric engine can be higher.

[0035] Specifically, the following conversion relationship exists between the operating power of an electric motor and its torque: T = 9550 × (p / n), where T is torque, P is operating power, and n is speed. This conversion can be calculated in software.

[0036] In the present disclosure, the propeller propulsion control command also includes a total power control command, the diesel engine operation control command also includes a first power command, and the electric engine operation control command also includes a second power command. The first power command is determined by the diesel engine operation control system 100, and the second power command is determined by the electric engine operation control system 200 based on the power difference between the total power control command and the first power command. This configuration facilitates flexible adjustment of the electric engine power, allowing the propeller to quickly reach the set power requirement.

[0037] Specifically, the electric engine has a second speed feedback module. The speed of the diesel engine fed back by the first speed feedback module is V1, and the speed of the electric engine fed back by the second speed feedback module is V2. When V1 ≤ V2 ≤ 1.04 V1, the electric engine and the diesel engine engage via the connecting assembly. This arrangement ensures more uniform and stable engagement between the electric engine and the diesel engine, reduces the risk of significant damage to the meshing gears of the electric engine and the diesel engine due to a large speed difference between the electric engine and the diesel engine, and increases the service life of the electric engine and the diesel engine.

[0038] In the present disclosure, the propulsion system also includes a remote control system 400. Remote control system 400 and diesel engine operation control system 100 are communicatively connected via a wired communication module. Remote control system 400 transmits communication control signals to the diesel engine via the wired communication module, including propulsion control command signals for the propeller. The diesel engine operation control system 100 also provides feedback to the remote control system 400 via the wired communication module regarding the diesel engine's control execution status. This facilitates control of both the diesel engine and the electric motor through manipulation of remote control system 400, improving control flexibility.

[0039] Specifically, the set speed driving mode and the set power driving mode in this embodiment can be implemented through corresponding buttons on the remote control system 400, which is convenient for operation.

[0040] Specifically, the remote control system 400 and the electric engine operation control system 200 are communicatively connected to each other via a wired communication module. The electric engine operation control system 200 provides feedback to the remote control system 400 via the wired communication module on the electric engine control system's execution status. This allows for immediate feedback on the electric engine control execution status, thereby facilitating determination of whether the predetermined propeller propulsion speed and predetermined propulsion power requirements are met.

[0041] In the present disclosure, the remote control system 400 is arranged on the bridge of the ship, so as to facilitate the operation by the staff.

[0042] Specifically, the propulsion system also includes a display module 500, which is located on the ship's bridge and communicatively connected to the remote control system 400. The display module 500 displays, via a display interface, the control status of the diesel engine by the diesel engine operation control system 100 and the control status of the electric engine by the electric engine operation control system 200. This configuration allows personnel to promptly understand the control status of the diesel engine and the electric engine by the electric engine operation control system 200.

[0043] The foregoing description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A hybrid propulsion system for ships based on a diesel engine and an electric engine, wherein the diesel engine is connected to a propeller power, characterized in that: include: a diesel engine operation control system, the diesel engine operation control system being configured to receive a propulsion control instruction for the propeller, the diesel engine operation control system being communicatively connected to the diesel engine, and the diesel engine operation control system issuing an operation control instruction for the diesel engine based on the received propulsion control instruction for the propeller to control the operation of the diesel engine; an electric engine operation control system, the electric engine operation control system being communicatively connected to the diesel engine operation control system, the electric engine operation control system being configured to determine and issue an operation control instruction for the electric engine based on a propeller propulsion control instruction received by the diesel engine operation control system and an operation control instruction for the diesel engine issued; an electric motor operating speed and power control unit, the electric motor operating speed and power control unit being communicatively connected to the electric motor operating control system, the electric motor operating speed and power control unit being configured to receive operating control instructions for the electric motor issued by the electric motor operating control system and to control the operation of the electric motor; the electric motor operating speed and power control unit being communicatively connected to the electric motor, the electric motor operating speed and power control unit being operated to switch between a set speed driving mode and a set power driving mode, so as to generate a set speed control signal to control the operating speed of the electric motor or to generate a power control signal to control the operating power of the electric motor; wherein, when the operating speed of the electric motor does not reach the set speed generated by the electric motor operating speed and power control unit, the electric motor operating speed and power control unit is in the set speed driving mode; When the operating speed of the electric engine reaches the set speed generated by the electric engine operating speed and power control unit, the electric engine operating speed and power control unit controls the electric engine to engage with the diesel engine through the connecting component, and the electric engine operating speed and power control unit is in the set power driving mode to control the operating power of the electric engine to reach the set power.

2. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 1, characterized in that: The propulsion control instruction for the propeller includes a total speed control instruction, the operation control instruction for the diesel engine includes a first speed instruction, and the operation control instruction for the electric engine includes a second speed instruction; The first speed instruction is determined according to the diesel engine operation control system, and the second speed instruction is determined by the electric engine operation control system according to the actual speed of the diesel engine fed back by the first speed feedback module of the diesel engine.

3. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 2, characterized in that: The propulsion control instruction for the propeller further includes a total power control instruction, the operation control instruction for the diesel engine further includes a first power instruction, and the operation control instruction for the electric engine further includes a second power instruction; The first power instruction is determined according to the diesel engine operation control system, and the second power instruction is determined by the electric engine operation control system according to a power difference between the total power control instruction and the first power instruction.

4. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 2, characterized in that: The electric engine has a second speed feedback module, the speed of the diesel engine fed back by the first speed feedback module is V1, and the speed of the electric engine fed back by the second speed feedback module is V2; Wherein, when V1≤V2≤1.04V1, the electric engine and the diesel engine are engaged through the connecting assembly.

5. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 1, characterized in that: Also includes: A remote control system, wherein the remote control system and the diesel engine operation control system are communicatively connected to each other via a wired communication module, and the remote control system sends a communication control signal to the diesel engine via the wired communication module, wherein the communication control signal includes a propulsion control instruction signal for the propeller; and the diesel engine operation control system feeds back to the remote control system via the wired communication module the control execution status of the diesel engine by the diesel engine operation control system.

6. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 5, characterized in that: The remote control system and the electric engine operation control system are communicatively connected to each other via the wired communication module, and the electric engine operation control system feeds back the control execution status of the electric engine by the electric engine operation control system to the remote control system via the wired communication module.

7. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 5, characterized in that: The remote control system is arranged on the bridge of the ship.

8. The hybrid propulsion system for ships based on a diesel engine and an electric engine according to claim 6, characterized in that: Also includes: A display module is provided on the bridge of the ship, the display module is communicatively connected to the remote control system, and the display module displays the control execution status of the diesel engine by the diesel engine operation control system and the control execution status of the electric engine by the electric engine operation control system through a display interface.

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