Hydraulic lubrication integrated system of wind turbine generator and wind power generation equipment

Abstract

The application discloses a hydraulic lubrication integrated system of a wind turbine, which comprises an oil tank, an oil pump, a hydraulic reversing valve, a lubricating reversing valve, a hydraulic actuator, a hydraulic lubricating pump and a lubricating grease storage device; the output ports of the oil pump are connected with the oil inlets of the hydraulic reversing valve and the lubricating reversing valve respectively; the oil outlet of the hydraulic reversing valve is connected with the hydraulic actuator; the oil outlet of the lubricating reversing valve is connected with the power port of the hydraulic lubricating pump; and the grease inlet of the hydraulic lubricating pump is connected with the lubricating grease storage device. The hydraulic driving device and the lubricating system are integrated into one system, a shared oil pump is used to provide power to realize automatic operation, the structure is more compact, the occupied cabin space is greatly reduced, the energy utilization rate is greatly improved, the cost is greatly reduced, the reliability is greatly improved, and the problem of low-temperature blockage of the lubricating system is solved. The application further discloses a wind power generation equipment comprising the hydraulic lubrication integrated system of the wind turbine.

Description

Technical Field

[0001] This invention relates to the field of wind power, and in particular to an integrated hydraulic lubrication system for wind turbine generators. Furthermore, this invention also relates to a wind power generation device comprising the aforementioned integrated hydraulic lubrication system for wind turbine generators. Background Technology

[0002] Currently, to meet cost requirements for wind turbine generators, large-megawatt units mostly adopt a sliding yaw configuration. Therefore, the function of the hydraulic system is diminished, primarily providing braking pressure for the high-speed shaft brake, and its usage frequency is extremely low. However, the hydraulic system is still essential, leading to excessive redundancy in its configuration and significant cost and resource waste. Furthermore, the centralized yaw lubrication system is also an essential component. However, because the lubrication system and the hydraulic system have completely different functions and use different media—hydraulic oil and grease—they are typically separate systems in the industry. Consequently, since both systems operate independently, driven by separate motors, they occupy large spaces, resulting in significant resource waste.

[0003] Therefore, how to provide a wind turbine hydraulic lubrication integrated system that integrates the hydraulic system and the lubrication system is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated hydraulic lubrication system for wind turbine generators, which integrates the hydraulic drive device and the lubrication system into one system, sharing a single oil pump to provide power for their respective actions, thus simplifying the structure and saving space. Another purpose of this invention is to provide a wind power generation device that includes the aforementioned integrated hydraulic lubrication system for wind turbine generators.

[0005] To address the aforementioned technical problems, this invention provides an integrated hydraulic lubrication system for wind turbine generators, comprising an oil tank, an oil pump, a hydraulic directional valve, a lubrication directional valve, a hydraulic actuator, a hydraulically driven lubrication pump, and a grease storage device. The output port of the oil pump is connected to the inlet of the hydraulic directional valve and the inlet of the lubrication directional valve, respectively. The outlet of the hydraulic directional valve is connected to the hydraulic actuator. The outlet of the lubrication directional valve is connected to the power port of the hydraulically driven lubrication pump. The grease inlet of the hydraulically driven lubrication pump is connected to the grease storage device.

[0006] Preferably, the liquid-driven lubrication pump includes a housing and a piston and a return spring disposed within the housing. The housing is provided with a power port, a grease inlet, and a grease outlet. The power port is located on one side of the piston, and the grease inlet and the grease outlet are located on the other side of the piston. The return spring is located on the side of the piston facing the grease inlet. A grease inlet check valve is provided at the grease inlet, and a grease outlet check valve is provided at the grease outlet.

[0007] Preferably, the grease storage device includes a storage tank and a pressure plate and a pressure spring disposed in the storage tank. The outlet of the storage tank is connected to the grease inlet, the outlet of the storage tank faces one side of the pressure plate, and the pressure spring is disposed on the other side of the pressure plate.

[0008] Preferably, the outlet of the grease check valve is connected to the inlet of the progressive distributor, and the multiple outlets of the progressive distributor are connected to the components to be lubricated.

[0009] Preferably, the hydraulic directional valve and the lubrication directional valve are specifically two-position three-way solenoid directional valves, and the return ports of the hydraulic directional valve and the lubrication directional valve are connected to the oil tank.

[0010] Preferably, the system further includes a manual pump connected to the oil tank, the output port of which is connected to the oil inlet of the hydraulic directional valve and the oil inlet of the lubrication directional valve, and an output check valve is provided at the output port of the oil pump and the output port of the manual pump.

[0011] Preferably, the oil inlet of the hydraulic directional valve and the oil inlet of the lubrication directional valve are connected to the oil tank through a parallel overflow valve and a shut-off valve.

[0012] Preferably, the hydraulic actuator is a hydraulic brake caliper.

[0013] Preferably, the system further includes an accumulator, the working port of which is connected to the oil inlet of the hydraulic directional valve and the oil inlet of the lubrication directional valve, respectively.

[0014] The present invention provides a wind power generation device, including a wind turbine hydraulic lubrication integrated system as described in any one of the above.

[0015] This invention provides an integrated hydraulic lubrication system for wind turbine generators, comprising an oil tank, an oil pump, a hydraulic directional valve, a lubrication directional valve, a hydraulic actuator, a hydraulically driven lubrication pump, and a grease storage device. The output port of the oil pump is connected to the oil inlet of the hydraulic directional valve and the oil inlet of the lubrication directional valve, respectively. The oil outlet of the hydraulic directional valve is connected to the hydraulic actuator. The oil outlet of the lubrication directional valve is connected to the power port of the hydraulically driven lubrication pump. The grease inlet of the hydraulically driven lubrication pump is connected to the grease storage device.

[0016] By integrating the hydraulic drive unit and lubrication system into one system, and using a single oil pump to power their respective actions, the structure becomes more compact, significantly reducing the space occupied in the engine compartment, greatly improving energy efficiency, significantly reducing costs, and significantly improving reliability, while also solving the problem of low-temperature blockage in the lubrication system.

[0017] The present invention also provides a wind power generation device including the above-mentioned integrated hydraulic lubrication system for wind turbines. Since the above-mentioned integrated hydraulic lubrication system for wind turbines has the above-mentioned technical effects, the above-mentioned wind power generation device should also have the same technical effects, which will not be described in detail here. Attached Figure Description

[0018] Figure 1 A hydraulic schematic diagram of a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention;

[0019] Figure 2 A hydraulic schematic diagram of the lubrication section in a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention;

[0020] Figure 3 This is a schematic diagram of a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention.

[0021] Figure 4 A pressure signal stage diagram of an accumulator in a specific embodiment of the integrated hydraulic lubrication system for wind turbines provided by the present invention.

[0022] Figure 5 A progressive distributor signal stage diagram for a specific embodiment of the wind turbine hydraulic lubrication integrated system provided by the present invention;

[0023] Figure 6 This is a diagram showing the blocking signal stages of a progressive distributor in a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention.

[0024] The components include: oil tank 1, oil pump 2, hydraulic reversing valve 3, lubrication reversing valve 4, hydraulically driven lubrication pump 5, housing 51, piston 52, return spring 53, grease inlet check valve 54, grease outlet check valve 55, grease storage device 6, oil reservoir 61, pressure plate 62, pressure spring 63, progressive distributor 7, manual pump 8, output check valve 9, overflow valve 10, shut-off valve 11, hydraulic brake caliper 12, accumulator 13, and valve block 14. Detailed Implementation

[0025] The core of this invention is to provide an integrated hydraulic lubrication system for wind turbine generators, which integrates the hydraulic drive device and the lubrication system into one system, sharing a single oil pump to provide power for their respective actions, thus simplifying the structure and saving space. Another core aspect of this invention is to provide a wind power generation device that includes the aforementioned integrated hydraulic lubrication system for wind turbine generators.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Please refer to Figure 1 and Figure 2 , Figure 1 A hydraulic schematic diagram of a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention; Figure 2 This is a hydraulic schematic diagram of the lubrication section in a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention.

[0028] This invention provides a real-time integrated hydraulic lubrication system for wind turbine generators, comprising an oil tank 1, an oil pump 2, a hydraulic directional valve 3, a lubrication directional valve 4, a hydraulic actuator, a hydraulically driven lubrication pump 5, and a grease storage device 6. The output port of the oil pump 2 is connected to the oil inlet of the hydraulic directional valve 3 and the oil inlet of the lubrication directional valve 4, respectively. The oil outlet of the hydraulic directional valve 3 is connected to the hydraulic actuator. The oil outlet of the lubrication directional valve 4 is connected to the power port of the hydraulically driven lubrication pump 5. The grease inlet of the hydraulically driven lubrication pump 5 is connected to the grease storage device 6.

[0029] During operation, the motor drives the oil pump 2 to work. The oil pump 2 draws hydraulic oil from the tank 1 and delivers it to the inlet of the hydraulic directional valve 3 and the inlet of the lubrication directional valve 4. When the hydraulic directional valve 3 is open, the hydraulic oil enters the hydraulic actuator to drive the corresponding action. When the lubrication directional valve 4 is open, the hydraulic oil enters the hydraulic lubrication pump 5. The hydraulic lubrication pump 5 outputs the lubricating grease that was previously drawn from the grease storage device 6 to each component to be lubricated, thus completing the system lubrication.

[0030] By integrating the hydraulic drive unit and lubrication system into one system, and using a single oil pump 2 to provide power for their respective actions, the structure is more compact, the volume occupied in the engine compartment is greatly reduced, the energy utilization rate is greatly improved, the cost is greatly reduced, the reliability is greatly improved, and the problem of low-temperature blockage in the lubrication system is solved.

[0031] In the integrated hydraulic lubrication system for wind turbine generators provided in a specific embodiment of the present invention, the hydraulically driven lubrication pump 5 includes a housing 51 and a piston 52 and a return spring 53 disposed within the housing 51. The housing 51 is provided with a power port, a grease inlet, and a grease outlet. The power port is located on one side of the piston 52, and the grease inlet and grease outlet are located on the other side of the piston 52. The return spring 53 is located on the side of the piston 52 facing the grease inlet. That is, the piston 52 divides the housing 51 into a hydraulic chamber and a lubrication chamber. A grease inlet check valve 54 is provided at the grease inlet. The grease inlet check valve 54 allows grease to enter the grease inlet of the housing 51, while restricting the grease from flowing out of the grease inlet. A grease outlet check valve 55 is provided at the grease outlet. The grease outlet check valve 55 allows grease to flow out of the grease outlet of the housing 51, while restricting the grease from entering through the grease outlet. Furthermore, the grease storage device 6 includes an oil storage tank 61 and an oil pressure plate 62 and an oil pressure spring 63 disposed in the oil storage tank 61. The outlet of the oil storage tank 61 is connected to the grease inlet, and the outlet of the oil storage tank 61 faces the side of the oil pressure plate 62. The oil pressure spring 63 is disposed on the other side of the oil pressure plate 62.

[0032] During operation, when the lubrication reversing valve 4 connects the oil pump 2 to the housing 51, hydraulic oil enters the hydraulic chamber of the housing 51 through the power port, pushing the piston 52 to move towards the lubrication chamber and compressing the return spring 53 in the lubrication chamber. Due to the flow direction limitation of the grease inlet check valve 54 and the grease outlet check valve 55, the grease in the lubrication chamber is pushed out through the grease outlet and will not flow back to the oil storage tank 61 through the grease inlet. When the lubrication reversing valve 4 connects the oil tank 1 to the housing 51, the hydraulic oil in the hydraulic chamber flows back to the oil tank 1 through the power port. The return spring 53 pushes the piston 52 to move towards the hydraulic chamber, forming a negative pressure in the lubrication chamber. Due to the flow direction limitation of the grease inlet check valve 54 and the grease outlet check valve 55, the grease in the oil storage tank 61 is drawn into the lubrication chamber of the housing 51. At the same time, the pressure spring 63 pushes the pressure plate 62 to assist the grease in the oil storage tank 61 into the housing 51. That is, by switching action of lubrication reversing valve 4, the liquid-driven lubrication pump 5 continuously performs the suction and discharge of lubricating oil.

[0033] Furthermore, the outlet of the grease discharge check valve 55 is connected to the inlet of the progressive distributor 7, and the multiple outlets of the progressive distributor 7 are connected to the components to be lubricated. The progressive distributor 7 is equipped with a transmitter that can emit pulse signals.

[0034] In the integrated hydraulic lubrication system for wind turbine generators provided in this specific embodiment of the invention, the hydraulic directional valve 3 and the lubrication directional valve 4 are specifically two-position three-way solenoid directional valves, and their return ports are connected to the oil tank 1. The directional switching is completed by energizing and de-energizing the two-position three-way solenoid directional valves, thereby controlling the flow of hydraulic oil to the corresponding components. Other types of valves may also be used, all within the scope of protection of this invention.

[0035] To improve system reliability, a manual pump 8 connected to the oil tank 1 is also included. The output port of the manual pump 8 is connected to the inlet of the hydraulic directional valve 3 and the inlet of the lubrication directional valve 4, respectively. Output check valves 9 are installed at the output ports of the oil pump 2 and the manual pump 8. The inlets of the hydraulic directional valve 3 and the lubrication directional valve 4 are connected to the oil tank 1 via a parallel overflow valve 10 and a shut-off valve 11. Specifically, the hydraulic actuator is a hydraulic brake caliper 12.

[0036] Based on the wind turbine hydraulic lubrication integrated system provided in the above specific embodiments, an accumulator 13 is also included. The working port of the accumulator 13 is connected to the oil inlet of the hydraulic reversing valve 3 and the oil inlet of the lubrication reversing valve 4, respectively. The internal pressure of the accumulator 13 forms a closed-loop control with the start and stop of the motor. The hydraulic oil pressure inside the accumulator 13 is always controlled within a certain pressure range to avoid continuous operation of the motor and extend the service life of the system.

[0037] Multiple hydraulic drive actuators and multiple lubrication devices can also be set, with corresponding multiple directional valves. A pressure sensor is configured at the output port of oil pump 2. The electrical control system starts and stops the motor as needed based on the pressure of accumulator 13 to maintain system pressure and determine system faults. The lubrication system operates intermittently and periodically. After entering the oiling stage, the solenoid valve periodically energizes and de-energizes, continuously operating until the required number of feedback pulse signals from the progressive distributor 7 is reached, at which point it enters a pause stage. The system is equipped with a hydraulic oil level sensor; abnormal oil level triggers an alarm or shutdown. The system is also equipped with a hydraulic temperature sensor; abnormal temperature triggers an alarm or shutdown. A brake caliper pressure detection sensor prevents the fan from operating if the brake pressure is abnormal. Finally, a lubrication oil level sensor stops the lubrication system and triggers an alarm if the oil level is abnormal.

[0038] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a specific embodiment of the integrated hydraulic lubrication system for wind turbine generators provided by the present invention.

[0039] A valve block 14 is installed above the oil tank 1, and various valves and other components are installed on the valve block 14. The hydraulic lubrication pump 5 and the grease storage device 6 are located on the side of the valve block 14 and connected by hoses. The layout of each component can be adjusted as needed, all of which are within the protection scope of this invention.

[0040] Please refer to Figure 4 , Figure 4This diagram illustrates the pressure signal stages of an accumulator in a specific embodiment of the integrated hydraulic lubrication system for wind turbines provided by this invention. When the pressure in accumulator 13 is below 100 bar, the motor drives the oil pump 2, increasing the internal pressure of accumulator 13. When the internal pressure in accumulator 13 exceeds 125 bar, the motor stops operating. Due to the action of the solenoid valve and internal leakage of hydraulic components, the pressure in accumulator 13 slowly decreases. When the pressure drops back to 100 bar, the motor restarts, and the pressure in accumulator 13 remains between 100 bar and 125 bar. If the pressure build-up time exceeds 30 seconds, the electronic control system issues a fault diagnosis, indicating a system pressure build-up timeout, excessive internal leakage, or low pump volumetric efficiency. If the pressure holding time is less than 2 hours, the electronic control system issues a fault diagnosis, indicating a pressure holding failure, excessive internal leakage, or low accumulator charging pressure.

[0041] Please refer to Figure 5 and Figure 6 , Figure 5 This is a diagram showing the signal stages of a progressive distributor in a specific embodiment of the integrated hydraulic lubrication system for wind turbines provided by the present invention. The lubrication system operates intermittently and periodically. After entering the oiling stage, the solenoid valve operates continuously in a cycle of 10 seconds of energization and 1 minute of de-energization until the progressive distributor 7 feeds back 5 pulse signals, after which it enters a pause stage. The pause stage lasts for 540 minutes before the lubrication system re-enters the oiling stage. Figure 6 This diagram illustrates the blockage signal stages of a progressive distributor in a specific embodiment of the integrated hydraulic lubrication system for wind turbines provided by this invention. After the lubrication system enters the lubrication phase, if the pulse signal period of any progressive distributor 7 is ≥10 minutes, the lubrication system automatically enters a pause state. After an interval of 540 minutes, it re-enters the lubrication phase. If no pulse signal is detected within 10 minutes, it again enters a pause state, and this process continues. If no pulse signal is detected for five consecutive cycles, the lubrication system stops working and issues a blockage warning. Adjustments to various data parameters are possible as needed, all within the scope of protection of this invention.

[0042] In addition to the aforementioned integrated hydraulic lubrication system for wind turbines, a specific embodiment of the present invention also provides a wind power generation device including the aforementioned integrated hydraulic lubrication system for wind turbines. The structure of other parts of the wind power generation device is described in the prior art and will not be repeated here.

[0043] The hydraulic lubrication integrated system for wind turbine generators and the wind power generation equipment provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A hydraulic lubrication integrated system for wind turbine generators, characterized in that, The system includes an oil tank (1), an oil pump (2), a hydraulic directional valve (3), a lubrication directional valve (4), a hydraulic actuator, a hydraulically driven lubrication pump (5), and a grease storage device (6). The output port of the oil pump (2) is connected to the oil inlet of the hydraulic directional valve (3) and the oil inlet of the lubrication directional valve (4). The oil outlet of the hydraulic directional valve (3) is connected to the hydraulic actuator. The oil outlet of the lubrication directional valve (4) is connected to the power port of the hydraulically driven lubrication pump (5). The grease inlet of the hydraulically driven lubrication pump (5) is connected to the grease storage device (6). It also includes an accumulator (13), the working port of which is connected to the oil inlet of the hydraulic directional valve (3) and the oil inlet of the lubrication directional valve (4); A valve block (14) is provided above the oil tank (1), and each valve is installed on the valve block (14). The liquid-driven lubrication pump (5) and the grease storage device (6) are located on the side of the valve block (14) and connected by a hose. When the pressure of the accumulator (13) is below 100 bar, the motor drives the oil pump (2) to run, and the internal pressure of the accumulator (13) increases. When the internal pressure of the accumulator (13) is above 125 bar, the motor stops running. The pressure of the accumulator (13) will slowly decrease. When the pressure drops to 100 bar again, the motor starts again. The pressure of the accumulator (13) is always maintained between 100 bar and 125 bar. When the pressure build-up time exceeds 30 seconds, the electrical control system issues a fault judgment. The fault is that the system pressure build-up time is too long, the system is depressurized, or the pump volumetric efficiency is low. When the pressure holding time is less than 2 hours, the electrical control system issues a fault judgment. The fault is that the pressure holding time is too long, the system is depressurized, or the accumulator charging pressure is low.

2. The integrated hydraulic lubrication system for wind turbine generators according to claim 1, characterized in that, The liquid-driven lubrication pump (5) includes a housing (51) and a piston (52) and a return spring (53) disposed in the housing (51). The housing (51) is provided with a power port, a grease inlet and a grease outlet. The power port is located on one side of the piston (52), and the grease inlet and the grease outlet are located on the other side of the piston (52). The return spring (53) is located on the side of the piston (52) facing the grease inlet. A grease inlet check valve (54) is provided at the grease inlet, and a grease outlet check valve (55) is provided at the grease outlet.

3. The integrated hydraulic lubrication system for wind turbine generators according to claim 2, characterized in that, The grease storage device (6) includes an oil tank (61) and an oil pressure plate (62) and an oil pressure spring (63) disposed in the oil tank (61). The outlet of the oil tank (61) is connected to the grease inlet. The outlet of the oil tank (61) faces the side of the oil pressure plate (62), and the oil pressure spring (63) is disposed on the other side of the oil pressure plate (62).

4. The integrated hydraulic lubrication system for wind turbine generators according to claim 3, characterized in that, The outlet of the grease discharge check valve (55) is connected to the inlet of the progressive distributor (7), and the multiple outlets of the progressive distributor (7) are connected to the components to be lubricated.

5. The integrated hydraulic lubrication system for wind turbine generators according to claim 1, characterized in that, The hydraulic directional valve (3) and the lubrication directional valve (4) are specifically two-position three-way solenoid directional valves, and the return ports of the hydraulic directional valve (3) and the lubrication directional valve (4) are connected to the oil tank (1).

6. The integrated hydraulic lubrication system for wind turbine generators according to claim 1, characterized in that, It also includes a manual pump (8) connected to the oil tank (1), the output port of the manual pump (8) is connected to the oil inlet of the hydraulic reversing valve (3) and the oil inlet of the lubrication reversing valve (4) respectively, and the oil pump (2) and the manual pump (8) are equipped with output check valves (9).

7. The integrated hydraulic lubrication system for wind turbine generators according to claim 6, characterized in that, The oil inlet of the hydraulic directional valve (3) and the oil inlet of the lubrication directional valve (4) are connected to the oil tank (1) through a parallel overflow valve (10) and a shut-off valve (11).

8. The integrated hydraulic lubrication system for wind turbine generators according to claim 1, characterized in that, The hydraulic actuator is specifically a hydraulic brake caliper (12).

9. A wind power generation device, characterized in that, Includes the integrated hydraulic lubrication system for wind turbines as described in any one of claims 1 to 8.

Images