Battery replacement type electric hydraulic traction machine and control method thereof

Abstract

The invention provides a battery replacement type electric hydraulic traction machine and a control method thereof, and belongs to the technical field of traction machines. The system comprises an energy storage battery which is used for supplying power to a control panel, a motor controller and a motor; the motor is used for driving the hydraulic pump and converting electric energy into hydraulic energy; the hydraulic motor is connected with the hydraulic pump through a hydraulic pipeline; the traction wheel is connected with the hydraulic motor through a transmission gear; the motor controller is used for controlling the working state of the motor. A diesel engine of an original hydraulic tractor is replaced by the motor, a tractor hydraulic system is driven, and normal operation of the tractor is guaranteed; and by using the motor, noise pollution during operation of the tractor is reduced, the problems of fuel consumption and tail gas emission are completely eradicated, and meanwhile, the maintenance cost of the tractor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tractors, and in particular to a battery - swapping type electric - hydraulic tractor. Background Art

[0002] A hydraulic tractor is a tractor used for the operation of stringing conductors and ground wires in transmission line projects. According to the traction rope (tractors with different bottom diameters of the pulley grooves can be selected; the traction rope is wound around the traction wheel, and the traction wheel and the traction rope provide sufficient friction; the tail - car axle frame bears the traction wire reel, and the tail - car power head provides power for the traction wire reel. When the traction wheel rotates, the tail - car rotates simultaneously to tighten the traction rope to reach the working state.

[0003] When the hydraulic tractor is working, it is divided into forward rotation and reverse rotation. Through the analysis of the operating conditions of the hydraulic tractor, the running time of the forward - rotation working condition of the tractor is about 90%, and the running time of the reverse - rotation working condition is 10%. The active working condition is that the tractor drags, relying on the conversion of electrical energy into mechanical energy to provide kinetic energy for the hydraulic system, and converting hydraulic energy into mechanical energy to achieve the traction working condition.

[0004] Existing hydraulic tractors generally use traditional diesel engines to provide power, which is transmitted to the traction wheel through the hydraulic system and the mechanical system to provide power for the traction wheel. There are main disadvantages such as noise pollution, fuel consumption, exhaust emission pollution, and high maintenance costs. For this reason, a battery - swapping type electric - hydraulic tractor and its control method are proposed. Summary of the Invention

[0005] In view of this, in order to solve the technical problems such as noise pollution, fuel consumption, exhaust emission pollution, and high maintenance costs existing in the existing hydraulic tractors, on the one hand, the present invention provides a battery - swapping type electric - hydraulic tractor, which uses an electric motor to replace the diesel engine of the original hydraulic tensioner to drive the hydraulic system of the tractor to ensure the normal operation of the tractor; the use of the electric motor reduces the noise pollution during the operation of the tractor, eliminates the problems of fuel consumption and exhaust emissions, and at the same time reduces the maintenance cost of the tractor.

[0006] To achieve the above object, the present invention provides the following technical solutions: A battery - swapping type electric - hydraulic tractor, comprising: An energy - storage battery for supplying power to the control panel, the motor controller, and the electric motor; An electric motor for driving a hydraulic pump to convert electrical energy into hydraulic energy; A hydraulic motor connected to the hydraulic pump through a hydraulic pipeline; A traction wheel connected to the hydraulic motor through a transmission gear; The motor controller is used to control the working state of the electric motor.

[0007] Preferably, the control panel has a battery manager and a display screen, and the battery manager is used to monitor the operating parameters of the energy storage battery and display them through the display screen.

[0008] Preferably, the motor is a variable-frequency alternating current motor.

[0009] Preferably, the motor is connected to the hydraulic pump through a coupling.

[0010] Preferably, it further includes a hydraulic manifold block connected to the hydraulic pump.

[0011] Preferably, it further includes a hydraulic oil tank, and the hydraulic oil tank is connected to the hydraulic pump through a hydraulic pipeline.

[0012] Preferably, hydraulic control buttons are arranged on the control panel for adjusting the overflow valve or hydraulic directional control valve on the hydraulic manifold block to control the operation of the hydraulic pump.

[0013] Preferably, it further includes a speed reducer, and the hydraulic motor is connected to the transmission gear through the speed reducer.

[0014] Preferably, the energy storage battery is a lithium-ion battery pack or a sodium-ion battery pack.

[0015] On the other hand, the present invention also provides a control method for the above-mentioned battery-swapping type electro-hydraulic tractor. By adjusting the motor controller to control the operation of the motor, driving the hydraulic pump to operate, and driving the traction wheel to rotate, the traction working condition or the wire feeding working condition is realized.

[0016] The present invention has the following beneficial effects compared with the prior art: The present invention innovatively uses a motor to replace the diesel engine used in the original hydraulic tractor, and drives the hydraulic system of the tractor through the motor to ensure that the tractor can work normally; the introduction of the motor significantly reduces the noise pollution generated during the operation of the tractor, completely solves the environmental problems brought by fuel consumption and exhaust emissions, and at the same time, the use of the motor also greatly reduces the maintenance cost of the tractor.

[0017] The core of the present invention lies in the innovative transformation of the diesel engine part of the traditional hydraulic tractor, converting it into an electric motor, thereby replacing the power output function of the traditional diesel engine and achieving the same or even better effects as the original power system. Through this transformation, the hydraulic tractor achieves zero fuel consumption and zero exhaust emissions during the construction process, effectively reducing energy consumption and lowering the cost during construction. In addition, the clean energy used in this invention is a lithium battery, which can be conveniently charged and discharged using civil electricity. The application of this invention not only improves the working environment of the operators, significantly reduces noise pollution, but also reduces the maintenance cycle and further lowers the maintenance cost. For harsh working environments such as high cold and high altitude, the power system and energy recovery system of the transformed hydraulic tractor are less affected by environmental temperature and altitude, so it has a wider adaptability and works more reliably. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present invention; In the figure, 1. Energy storage battery; 2. Control panel; 3. Motor controller; 4. Variable frequency AC motor; 5. Coupling; 6. Hydraulic pump; 7. Hydraulic motor; 8. Hydraulic integration block; 9. Reducer; 10. Transmission gear; 11. Traction wheel; 12. Hydraulic oil tank. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "equipped with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] As Figure 1 shown, the present invention provides a battery - swapping type electro - hydraulic tractor, including: Energy - storage battery 1, which is an important energy device. The energy - storage battery 1 is connected to the control panel 2 and the motor manager, and is mainly used to provide the required power support for the control panel 2, the motor controller 3, and the motor 4. In these applications, the motor 4 is usually preferably a variable - frequency AC motor. Because the AC motor 4 has obvious advantages in terms of operation efficiency and maintenance. By using the motor 4 to replace the traditional diesel engine, it can effectively reduce noise pollution and achieve the goal of zero exhaust emissions. As the provider of the driving energy, the energy - storage battery 1 can not only effectively reduce the energy consumption cost, but also solve the problems of environmental pollution, high energy consumption, and frequent maintenance brought by traditional diesel tractors. The combination of the energy - storage battery 1 and the motor 4 can significantly improve the construction efficiency and economy, bringing a revolutionary change to related industries.

[0023] Hydraulic motor 7 is connected to the hydraulic pump 6 through a hydraulic pipeline. The hydraulic pump 6 works to pump hydraulic oil into the hydraulic motor 7 through the hydraulic pipeline to drive the hydraulic motor 7 to work. Its working principle is as follows: The motor 4 drives the hydraulic pump 6: Preferably, the variable - frequency AC motor 4 is connected to the hydraulic pump 6 through a coupling 5, and then drives the hydraulic pump 6 to convert electrical energy into hydraulic energy.

[0024] Hydraulic energy transfer: The hydraulic pump 6 transports high - pressure hydraulic oil to the hydraulic motor 7 through the hydraulic pipeline.

[0025] Mechanical energy output: The hydraulic motor 7 converts hydraulic energy into rotational mechanical energy, and preferably drives the traction wheel 11 through the transmission gear 10 and the reduction gear 9.

[0026] The hydraulic motor 7 can output low - speed and high - torque, which is suitable for towing heavy - load ground wires (such as ACSR); the power density is 3 - 5 times that of the electric direct - drive system, meeting the high - load requirements of transmission line construction.

[0027] The collaborative design of the hydraulic motor 7 and the electric motor 4 adjusts the speed of the electric motor 4 through a carefully designed motor controller 3, thereby controlling the output flow of the hydraulic pump 6, and realizing stepless adjustment of the traction speed. The preferred control method of the hydraulic motor 7 is to control through the hydraulic manifold block 8. A pressure sensor is built into the hydraulic manifold block 8, which can feedback the pressure information of the hydraulic pump 6 in real time. Through the PID algorithm module built into the hydraulic manifold block 8, the opening of the overflow valve can be dynamically adjusted to ensure the stability of the traction force. The collaborative working mode of the hydraulic motor 7 and the electric motor 4 can not only achieve efficient energy conversion, but also provide precise control, realize energy recovery, and has high reliability. This design solves the problems of high pollution, high energy consumption and difficult maintenance existing in traditional tractors. Its technical advantages are particularly suitable for the requirements of heavy-load and high-frequency operations such as transmission line erection, and its comprehensive performance is significantly better than that of traditional diesel-hydraulic systems.

[0028] The traction wheel 11 is closely connected to the hydraulic motor 7 through the transmission gear 10, ensuring the effective transmission of power and the smoothness of mechanical operation.

[0029] The motor controller 3 is used to control the working state of the electric motor 4.

[0030] In the present invention, the control panel 2 has a battery manager and a display screen. The battery manager is used to monitor the working parameters of the energy storage battery 1 and display them through the display screen.

[0031] In the present invention, the electric motor 4 is connected to the hydraulic pump 6 through a coupling 5.

[0032] In the present invention, it also includes a hydraulic manifold block 8 connected to the hydraulic pump 6. Preferably, it feedbacks the pressure of the hydraulic pump 6 through the built-in one in the present invention, and controls the opening of the overflow valve to adjust the pressure of the hydraulic pump 6 to ensure the stability of the traction force.

[0033] In the present invention, it also includes a hydraulic oil tank 12. The hydraulic oil tank 12 is connected to the hydraulic pump 6 through a hydraulic pipeline and is used to supply oil to the entire hydraulic system.

[0034] In the present invention, on the control panel 2, hydraulic control buttons are specially set. The function of these buttons is to adjust the overflow valve or hydraulic reversing valve on the hydraulic manifold block 8, thereby controlling the operating state of the hydraulic pump 6.

[0035] In the present invention, a speed reducer 9 is further included. The hydraulic motor 7 is connected to the transmission gear 10 through the speed reducer 9. The speed reducer 9 can effectively reduce the rotational speed of the hydraulic motor 7, provide a large torque, and transmit the power to the transmission gear 10. Through this design, the connection between the hydraulic motor 7 and the transmission gear 10 is achieved through the speed reducer 9, thereby ensuring the smooth operation of the entire mechanical system and the high-efficiency power output.

[0036] In the present invention, the energy storage battery 1 involved can be a lithium-ion battery pack or a sodium-ion battery pack. In addition, the present invention further includes a charging device, the function of which is to charge the energy storage battery 1, thereby ensuring the long-term stable operation of the battery. To further ensure the efficient, stable, and long-term operation of the energy storage battery 1, the present invention also particularly designs a battery management system. In the battery management system, a temperature control device can be set, the purpose of which is to ensure that the energy storage battery 1 can be within the optimal operating temperature range during use. Through such a design, the energy storage battery 1 can effectively meet the energy requirements of the tractor under the active working conditions and ensure its normal operation. The battery management system can select a conventional battery management system according to actual needs.

[0037] The working principle of the above-mentioned battery-swapping type electro-hydraulic tractor provided by the present invention is as follows: The design concept of the present invention is to use the energy storage battery 1 as the main energy source, which realizes its function by driving the electric motor 4. The electric motor 4 and the hydraulic pump 6 are connected through a coupling 5 to ensure the smooth transmission of power. The function of the hydraulic pump 6 is to transfer the energy to the hydraulic motor 7 connected to the traction wheel 11, and the hydraulic motor 7 is responsible for converting the power into the rotational motion of the traction wheel 11. To improve the traction efficiency, a speed reducer 9 is also added, which can effectively reduce the speed, thereby increasing the traction force of the traction wheel 11. In addition, the control panel 2 is equipped with an advanced battery manager and a display screen, which can real-time monitor the voltage, power, output power of the energy storage battery 1 and the sustainable operation time of the device, ensuring that the operator has a clear understanding of the device status. The hydraulic control valve on the control panel 2 is used to adjust the overflow valve or the hydraulic directional control valve on the hydraulic manifold block 8, thereby precisely controlling the operating state of the entire hydraulic system and ensuring the high-efficiency and safe operation of the tractor.

[0038] On the other hand, the present invention also provides a control method for the above-mentioned battery-swapping type electro-hydraulic tractor. By adjusting the motor controller 3, the electric motor 4 is controlled to operate, driving the hydraulic pump 6 to run, and driving the traction wheel 11 to rotate, so as to realize the traction working condition or the wire feeding working condition.

[0039] When the tractor is in the traction working condition, the motor controller 3 is adjusted to control the operation of the variable-frequency AC motor 4, so as to realize the operation of the motor 4 and drive the hydraulic pump 6 to operate. By controlling the hydraulic directional valve, the flow direction of the hydraulic oil in the hydraulic system is adjusted to change the rotation direction of the hydraulic motor 7, driving the traction wheel 11 to rotate, thus realizing the traction working condition.

[0040] When the tractor is in the wire-loosing working condition, the motor controller 3 is adjusted to control the motor 4, driving the hydraulic pump 6 to operate. By controlling the hydraulic directional valve, the flow direction of the hydraulic oil in the hydraulic system is adjusted to change the rotation direction of the hydraulic motor 7, driving the traction wheel 11 to rotate, thus realizing the wire-sending working condition.

[0041] The above; only the preferred specific embodiments of the present invention; but the protection scope of the present invention is not limited thereto; any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved conceptions, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A battery-changing electric hydraulic traction machine, characterized in that: include: Energy storage batteries to power the control panel, motor controller and electric motor; The electric motor is used to drive the hydraulic pump to convert electrical energy into hydraulic energy; A hydraulic motor connected to the hydraulic pump via a hydraulic pipeline; A traction wheel connected to the hydraulic motor via a transmission gear; The motor controller is used to control the working state of the motor.

2. The battery-swap electric hydraulic traction machine according to claim 1, characterized in that: The control panel has a battery manager and a display screen. The battery manager is used to monitor the working parameters of the energy storage battery and display them through the display screen.

3. The battery-swap electric hydraulic traction machine according to claim 1, characterized in that: The motor is a variable frequency AC motor.

4. The battery-swap electric hydraulic traction machine according to claim 1, characterized in that: The electric motor is connected to the hydraulic pump via a coupling.

5. The battery-swap electric hydraulic traction machine according to claim 1, characterized in that: It also includes a hydraulic integrated block connected to the hydraulic pump.

6. The battery-swap electric hydraulic traction machine according to claim 5, characterized in that: It also includes a hydraulic oil tank, which is connected to the hydraulic pump through a hydraulic pipeline.

7. The battery-swap electric hydraulic traction machine according to claim 6, characterized in that: The control panel is provided with a hydraulic control button for adjusting the overflow valve or the hydraulic reversing valve on the hydraulic integrated block to control the operation of the hydraulic pump.

8. The battery-swap electric hydraulic traction machine according to claim 1, characterized in that: It also includes a reducer, and the hydraulic motor is connected to the transmission gear through the reducer.

9. A battery-swap electric hydraulic traction machine according to any one of claims 1 to 8, characterized in that: The energy storage battery is a lithium ion battery pack or a sodium ion battery pack.

10. A control method for a battery-swapping electric hydraulic traction machine according to any one of claims 1 to 9, characterized in that: By adjusting the motor controller to control the action of the motor, the hydraulic pump is driven to operate, and the traction wheel is driven to rotate, thereby realizing the traction condition or the wire feeding condition.

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