Power device and engineering instrument

Abstract

The embodiment of the utility model relates to the technical field of power assemblies, and particularly discloses a power device and engineering instrument.The power device comprises an engine, a generator, a clutch, a motor and a first speed reducer, the output end of the engine is connected to the input end of the generator, and the output end of the generator is connected to the input end of the clutch; the output end of the clutch is in transmission connection with the input end of the first speed reducer, the output end of the motor and the clutch are connected to the input end of the first speed reducer in parallel, and the output end of the first speed reducer is externally connected with a load. When the clutch is disconnected, the motor drives the load through the first speed reducer; when the clutch is closed, the electric motor and the engine jointly drive the load through the first speed reducer. By means of the mode, the hybrid driving mode of the power device can be achieved, and compared with a pure electric driving mode adopted by an existing power device, the hybrid driving mode is convenient to complement energy.

Description

Technical Field

[0001] This application relates to the field of powertrain technology, and in particular to a power unit and engineering equipment. Background Technology

[0002] As an important source of power output in engineering machinery, the power source of the power unit determines the response speed and working range of the engineering machinery. In order to reduce environmental pollution, existing engineering machinery generally adopts electric drive, thereby reducing the overall cost of use and accelerating the industrialization of electric engineering machinery.

[0003] In the process of developing this application, the inventors discovered that currently, electric engineering machinery relies solely on built-in batteries for power, resulting in insufficient battery life during extended operation. In particular, compared to the rapid refueling of traditional fuel-powered machinery, electric machinery requires an external power source for charging, leading to longer charging times. Furthermore, due to the unique transmission and storage methods of electrical energy, electric machinery can only be refueled at fixed points, impacting the user experience. Utility Model Content

[0004] This application provides a power device and engineering machinery, and the main technical problem it solves is that the power replenishment conditions for purely electric engineering machinery are harsh, which affects the user experience of the engineering machinery.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a power device, including an engine, a generator, a clutch, an electric motor, and a first reducer. The output end of the engine is connected to the input end of the generator, the output end of the generator is connected to the input end of the clutch, the output end of the clutch is drively connected to the input end of the first reducer, and the output end of the electric motor and the clutch are both connected in parallel to the input end of the first reducer. The output end of the first reducer is externally connected to a load. When the clutch is disengaged, the electric motor drives the load through the first reducer. When the clutch is engaged, the electric motor and the engine jointly drive the load through the first reducer.

[0006] Optionally, the power unit includes a second reducer, the output end of the engine is connected to the input end of the generator, the output end of the generator is connected to the input end of the second reducer, the output end of the second reducer is connected to the input end of the clutch, and the output end of the clutch is connected to the input end of the first reducer.

[0007] Optionally, the engine is a methanol engine.

[0008] Optionally, the power unit includes an energy storage power source, which is electrically connected to the generator and the motor respectively. The energy storage power source is used to store the electrical energy generated when the engine is running and to supply power to the motor when the clutch is disengaged.

[0009] Optionally, the power unit includes a drive shaft located between the input end of the clutch and the first reducer, so that the generator can generate electricity under the drive of the engine and the generator can transmit the output torque of the engine.

[0010] Optionally, the generator includes a rotor and a stator, the rotor and the stator being rotatably connected, one end of the rotor being connected to the output end of the engine, and the other end of the rotor being connected to the first reducer.

[0011] Optionally, the generator includes a regulator for adjusting the excitation current or the rotor speed, and dynamically distributing the ratio of electrical energy output to mechanical torque output of the generator.

[0012] Optionally, the power unit includes a control component electrically connected to the engine, the generator, the clutch, and the electric motor. The control component is used to control the engagement and disengagement of the clutch to change the drive mode of the power unit.

[0013] Optionally, the power unit includes a first detector, which is used to detect the value of the external load connected to the output end of the first reducer. When the detected value of the first detector is less than or equal to a first preset value, the control component controls the clutch to disengage. When the detected value of the first detector is greater than the first preset value, the control component controls the clutch to close.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide an engineering device, including the aforementioned power device.

[0015] The beneficial effects of this application's embodiments are as follows: Unlike existing technologies, this application provides a power device including an engine, a generator, a first reducer, a clutch, an electric motor, and a second reducer. The engine is driven by the generator and the first reducer. The output end of the first reducer is driven by the clutch and connected to the second reducer. The output end of the electric motor and the clutch are both connected in parallel to the second reducer. The output end of the second reducer is connected to an external load. When the clutch is disengaged, the electric motor drives the load through the second reducer. When the clutch is engaged, the electric motor and the engine jointly drive the load through the second reducer. With this structure, this application's embodiments can achieve different driving modes for the load by controlling the disengagement or engagement of the clutch, relying on the engine-driven generator and electric motor. Compared to power devices solely driven by electricity, the structure of this application, where the engine drives the generator and electric motor together, has a longer driving range and is more convenient for recharging. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the power unit provided in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the power device provided in the embodiments of this application.

[0019] Icon labels:

[0020] 1000. Power unit; 1. Engine; 2. Generator; 3. Clutch; 4. Electric motor; 5. First reducer; 6. Second reducer; 7. Load. Detailed Implementation

[0021] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0023] Please see Figure 1 The power unit 1000 includes: an engine 1, a generator 2, a clutch 3, an electric motor 4, and a first reducer 5. The output end of the engine 1 is connected to the input end of the generator 2, the output end of the generator 2 is connected to the input end of the clutch 3, the output end of the clutch 3 is connected to the input end of the first reducer 5, and the output end of the electric motor 4 and the clutch 3 are both connected in parallel to the input end of the first reducer 5. The output end of the first reducer 5 is connected to an external load 7. When the clutch 3 is disengaged, the electric motor 4 drives the load 7 through the first reducer 5. When the clutch 3 is engaged, the electric motor 4 and the engine 1 jointly drive the load 7 through the first reducer 5. Through the above structure, the power unit 1000 can adjust its driving mode by relying on the clutch 3 located between the generator 2 and the first reducer 5. This allows the engineering machinery using the power unit 1000 to be adjusted according to the actual working environment. For example, when working in an area with convenient power supply, the clutch 3 can be disengaged, so that the power unit 1000 is in a working mode where the generator 2 drives the first reducer 5 alone, reducing the operating cost of the engineering machinery. When the engineering machinery is working in an area with inconvenient power supply, the clutch 3 can be engaged, so that the electric motor 4 and the engine 1 jointly drive the first reducer 5, thereby reducing the dependence on the generator 2. Furthermore, the electric energy generated by the generator 2 driven by the engine 1 can provide power support for the electric motor 4. This allows the entire power unit 1000 to operate normally by only needing to replenish the fuel of the engine 1, reducing the energy replenishment conditions of the engineering machinery using the power unit 1000 and improving the applicability of the engineering machinery to the working environment.

[0024] Understandably, since the output end of the electric motor 4 and the clutch 3 are both connected in parallel to the input end of the first reducer 5, the user of the power unit 1000 can select the driving force source for driving the first reducer 5 according to the actual working load 7. That is, it can be selected that the engine 1 drives the first reducer 5 to work, at which time the electric motor 4 is not working and the clutch 3 is in the closed state; or it can be selected that the electric motor 4 drives the first reducer 5 to work, the engine 1 and the generator 2 connected to it are not working or the engine 1 drives the generator 2 to only generate electricity, at which time the clutch 3 is in the open state.

[0025] It should be noted that when the generator 2 and the electric motor 4 driven by the engine 1 work together, the output torque of the entire power unit 1000 reaches its maximum, and at this time the load 7 that the power unit 1000 can drive reaches its maximum.

[0026] Understandably, when the generator 2 driven by engine 1 outputs torque, if the rotational speed of the generator 2 is too high, the clutch 3 directly connected to it will experience wear, affecting the durability of the clutch 3. Therefore, in some embodiments, the power unit 1000 includes a second reducer 6. The output end of engine 1 is connected to the input end of generator 2, the output end of generator 2 is connected to the input end of second reducer 6, the output end of second reducer 6 is connected to the input end of clutch 3, and the output end of clutch 3 is connected to the input end of first reducer 5. The aforementioned second reducer 6 allows the power unit 1000 to adjust the reduction ratio of the second reducer 6 according to actual power requirements, so that engine 1 operates in the high-efficiency range, while generator 2 generates electricity at a suitable speed, and simultaneously transmits an appropriate amount of torque to subsequent components.

[0027] It should be noted that the power source driving the engine 1 mentioned above includes, but is not limited to, combustibles such as fuel, methanol, and ethanol. For example, in this embodiment, the engine 1 is preferably a methanol engine 1, which utilizes methanol as a clean energy source to effectively reduce the impact on the environment.

[0028] In some embodiments, the power unit 1000 includes an energy storage power source (not shown), which is electrically connected to both the generator 2 and the electric motor 4. The energy storage power source stores the electrical energy generated during engine 1 operation and supplies power to the electric motor 4 when the clutch 3 is disengaged. By adding the energy storage power source, the electrical energy generated by the generator 2 driven by the engine 1 is stored in an energy storage battery, and the electrical energy in the battery is used to drive the operation of the electric motor 4. This further improves the driving range of the power unit 1000, fully utilizes the power generated by the engine 1, and enhances the energy conversion efficiency of the power unit 1000.

[0029] In some embodiments, the power unit 1000 includes a drive shaft (not shown) located between the input end of the clutch 3 and the first reducer 5, so that the generator 2 can generate electricity under the drive of the engine 1, and the generator 2 can transmit the output torque of the engine 1.

[0030] Understandably, the drive shaft needs to maintain sufficient rigidity to ensure continuous power output, and the drive shaft's flexibility needs to accommodate the wide range of torque output by the engine 1 driving the generator 2.

[0031] The generator 2 described above includes a rotor (not shown) and a stator (not shown), which are rotatably connected. One end of the rotor is connected to the output end of the engine 1, and the other end is connected to the first reducer 5. The engine 1 drives the rotor to rotate, and then the rotation of the rotor transmits the rotation of the engine 1 to the second reducer 6. After passing through the second reducer 6, the rotation is transmitted to the first reducer 5 through the clutch 3, thereby realizing the transmission of torque to the engine 1.

[0032] It should be noted that generator 2, while transmitting power, also functions as a generator. Specifically, when the rotor and stator rotate relative to each other, they cut the magnetic field to generate an induced current. In some embodiments, generator 2 includes a regulator used to adjust the excitation current or rotor speed, dynamically allocating the ratio of electrical energy output to mechanical torque output of generator 2. By adjusting the ratio of power transmitted and generated by generator 2, the power unit 1000 can dynamically adjust the output power of generator 2 according to different loads 7, thereby improving the utilization rate of clean energy methanol by generator 2.

[0033] In some embodiments, the power unit 1000 includes a control component (not shown), which is electrically connected to the engine 1, generator 2, clutch 3, and electric motor 4. The control component is used to control the opening and closing of the clutch 3 to change the drive mode of the power unit 1000. Furthermore, the control component is also used to control the start and stop of the engine 1, the start and stop of the generator 2, the ratio of electrical energy output to mechanical torque output of the generator 2, and the start and stop of the electric motor 4.

[0034] To facilitate understanding of the switching between various modes in this application, examples are provided to illustrate the switching modes of the power unit 1000 in response to different loads:

[0035] When facing low loads, engine 1 does not operate, clutch 3 disengages, and load 7 is driven by electric motor 4 driving first reducer 5. At this time, power unit 1000 is in pure electric drive mode, with power supplied externally or by built-in energy storage battery; or clutch 3 disengages, engine 1 drives generator 2 to generate electricity to replenish energy storage battery, and energy storage battery provides power to connected electric motor 4. Electric motor 4 drives first reducer 5 to drive load 7. At this time, the power of power unit 1000 is provided solely by electric motor 4 driven by engine 1, so that power unit 1000 does not need to return to a designated recharge point for recharge when the built-in energy storage power is depleted, thereby improving the endurance of engineering machinery using power unit 1000.

[0036] When facing high loads, clutch 3 closes, engine 1 drives generator 2, and the torque of engine 1 is transmitted to first reducer 5 through generator 2 and second reducer 6 to drive the external load. Furthermore, the operating conditions when clutch 3 is closed can be classified according to the load conditions. For example: Operating condition 1, when a load is applied, engine 1 and electric motor 4 jointly drive load 7, and engine 1 operates in its high-efficiency range; Operating condition 2, when there is no load, electric motor 4 drives first reducer 5 to drive load 7, engine 1 operates in its high-efficiency range, and engine 1 drives generator 2 to generate electricity, providing power to electric motor 4.

[0037] It should be noted that "engine 1 is always in the high-efficiency zone" means that engine 1 operates within a specific speed and load range to ensure that the thermal efficiency of engine 1 is high enough.

[0038] In some embodiments, the power unit 1000 includes a first detector electrically connected to a control component. The first detector detects the value of the external load 7 connected to the output terminal of the first reducer 5 for the control component to read. When the detected value of the first detector is less than or equal to a first preset value, the control component controls the clutch 3 to disengage; when the detected value of the first detector is greater than the first preset value, the control component controls the clutch 3 to engage. Through the setting of this first detector, in conjunction with the control component, the automatic adjustment of the automatic drive mode of the power unit 1000 is achieved, thereby further improving the energy utilization rate of the power unit 1000.

[0039] In this application, the power unit 1000 includes an engine 1, a generator 2, a clutch 3, an electric motor 4, and a first reducer 5. The output end of the engine 1 is connected to the input end of the generator 2, the output end of the generator 2 is connected to the input end of the clutch 3, the output end of the clutch 3 is drivenly connected to the input end of the first reducer 5, and the output end of the electric motor 4 and the clutch 3 are both connected in parallel to the input end of the first reducer 5. The output end of the first reducer 5 is externally connected to a load 7. When the clutch 3 is disengaged, the electric motor 4 drives the load 7 through the first reducer 5. When the clutch 3 is engaged, the electric motor 4 and the engine 1 jointly drive the load 7 through the first reducer 5. By controlling the opening and closing of the clutch 3, the power unit 1000 can generate multiple driving modes, thereby enabling the power unit 1000 to adjust according to different working conditions to improve the energy utilization rate of the power unit 1000. Furthermore, due to the configuration of the engine 1 and the generator 2, when the power unit 1000 is inconvenient to recharge, it can rely on the structure of the engine 1 and the electric motor 4, which combines power generation and power transmission, to continuously operate on clean fuels such as methanol and recharge the electric motor 4, thus improving the applicability of the power unit 1000.

[0040] This application also provides an embodiment of an engineering device, which includes the power unit 1000 described above. For the specific structure and function of the power unit 1000 of the engineering device, please refer to the above embodiment, which will not be repeated here.

[0041] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A power plant, characterized in that include: The system includes an engine, a generator, a clutch, an electric motor, and a first reducer. The output of the engine is connected to the input of the generator, the output of the generator is connected to the input of the clutch, the output of the clutch is connected to the input of the first reducer, and the output of the electric motor and the clutch are both connected in parallel to the input of the first reducer. An external load is connected to the output of the first reducer. When the clutch is disengaged, the electric motor drives the load through the first reducer; When the clutch is engaged, the electric motor and the engine together drive the load through the first reducer.

2. The power unit according to claim 1, characterized in that, The power unit includes a second reducer, the output end of the engine is connected to the input end of the generator, the output end of the generator is connected to the input end of the second reducer, the output end of the second reducer is connected to the input end of the clutch, and the output end of the clutch is connected to the input end of the first reducer.

3. The power unit according to claim 1, characterized in that, The engine is a methanol engine.

4. The power unit according to claim 1, characterized in that, The power unit includes an energy storage power source, which is electrically connected to the generator and the motor respectively. The energy storage power source is used to store the electrical energy generated when the engine is running and to supply power to the motor when the clutch is disengaged.

5. The power unit according to claim 1, characterized in that, The power unit includes a drive shaft located between the input end of the clutch and the first reducer, so that the generator can generate electricity under the drive of the engine and can transmit the output torque of the engine.

6. The power unit according to claim 1, characterized in that, The generator includes a rotor and a stator, which are rotatably connected. One end of the rotor is connected to the output end of the engine, and the other end of the rotor is connected to the first reducer.

7. The power unit according to claim 6, characterized in that, The generator includes a regulator for adjusting the excitation current or the rotor speed, and dynamically distributing the ratio of electrical energy output to mechanical torque output of the generator.

8. The power unit according to any one of claims 1-7, characterized in that, The power unit includes a control component that is electrically connected to the engine, the generator, the clutch, and the electric motor. The control component is used to control the engagement and disengagement of the clutch to change the drive mode of the power unit.

9. The power unit according to claim 8, characterized in that, The power unit includes a first detector, which is used to detect the value of the external load connected to the output end of the first reducer; When the detection value of the first detector is less than or equal to a first preset value, the control component controls the clutch to disengage; When the detection value of the first detector is greater than the first preset value, the control component controls the clutch to close.

10. An engineering vehicle characterized by, Includes the power unit as described in any one of claims 1-9.

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