A wind turbine gearbox oil liquid replacement filtering device

Abstract

This invention relates to the field of wind turbine gearbox maintenance equipment technology, and discloses a wind turbine gearbox oil replacement and filtration device, including a tank and an oil inlet pipe. The oil inlet pipe is located at the oil inlet of the tank and is used to connect to the oil outlet of the wind turbine gearbox, introducing the oil to be filtered and replaced into the tank to form an input path for oil circulation filtration. An impeller is rotatably installed inside the tank, driven by the impact of the oil flowing in through the oil inlet pipe, converting the kinetic energy of the oil flow into rotational mechanical energy. This provides driving force for the drive mechanism without the need for an additional power source. A bearing is installed between the crossbar and the side wall of the tank. This wind turbine gearbox oil replacement and filtration device eliminates the need for an independent power source and control circuit for the nozzle's oscillation action, effectively reducing the device's operating energy consumption and manufacturing cost. It also simplifies the overall structure of the device, reducing the difficulty of on-site installation, commissioning, and subsequent maintenance.

Description

Technical Field

[0001] This invention relates to the field of wind turbine gearbox maintenance equipment technology, specifically to a wind turbine gearbox oil replacement and filtration device. Background Technology

[0002] The wind turbine gearbox oil replacement and filtration device is mainly used for the replacement and maintenance of lubricating oil in wind turbine gearboxes. It can filter impurities in the lubricating oil, circulate and reinject it, and clean the inner cavity of the gearbox. It plays an important role in ensuring the lubrication performance of the gearbox and extending the service life of transmission components.

[0003] Current wind turbine gearbox oil filtration devices generally possess basic functions of oil filtration and reinjection, with some also equipped with cleaning nozzles to clean the inside of the gearbox. Devices using fixed nozzles have limited spray coverage, easily creating cleaning dead zones in the corners and low-lying areas of the gearbox's interior, making it difficult to thoroughly flush away deposited sludge and metal debris. To expand the cleaning coverage of the nozzles, some devices use an additional independent electric drive mechanism to move the nozzles. Since this requires a separate power source and control circuitry for the nozzle movement, it not only increases the device's energy consumption and overall manufacturing cost but also makes the overall structure more complex, increasing the difficulty of on-site installation, commissioning, and subsequent maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a wind turbine gearbox oil replacement filter device to solve the following technical problems: First, the scheme using an electric drive mechanism to drive the nozzle to swing requires a separate power source and control circuit, resulting in high energy consumption, high manufacturing costs, complex overall structure, and difficulty in installation, commissioning, maintenance, and repair. Second, the cleaning coverage of the fixed nozzle is limited, easily leading to cleaning dead zones and poor cleaning effect inside the gearbox cavity.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine gearbox oil replacement and filtration device, comprising a tank and an oil inlet pipe. The oil inlet pipe is located at the oil inlet of the tank and is used to connect to the oil outlet of the wind turbine gearbox, introducing the oil to be filtered and replaced into the tank to form an input path for oil circulation filtration. An impeller is rotatably mounted inside the tank, driven by the impact of the oil flowing in through the oil inlet pipe, converting the kinetic energy of the oil flow into rotational mechanical energy. This provides driving force for the drive mechanism without the need for an additional power source, while simultaneously turbulently dispersing the flowing oil. A support plate is fixedly connected to the inner cavity of the tank, providing a mounting support foundation for the filtration and power components inside the tank, and dividing the inner cavity of the tank into an upper filtration chamber and a lower oil collection chamber. A motor is mounted on the top of the support plate, and the output end of the motor is connected to a filter cartridge. The motor drives the filter cartridge to rotate at high speed, generating centrifugal force, causing the oil to pass through the filter holes of the filter cartridge to complete solid-liquid separation, thus separating the oil... Metal fragments, sludge, and other impurities in the liquid are trapped inside the filter cartridge, achieving efficient centrifugal filtration of the oil. The bottom of the tank is threadedly connected to a base plate with a detachable threaded connection structure, facilitating maintenance, cleaning, and impurity removal of the filter cartridge, oil collection box, and other components inside the tank. An oil collection box is installed on the top of the base plate to temporarily store the cleaned oil after filtration, providing a stable oil source for subsequent oil reinjection into the gearbox. The oil inlet of the oil collection box is connected to a short pipe, and the other end of the short pipe is connected to a pump body. The oil inlet of the pump body is connected to an oil passage hole on the support plate through a sealed pipe. The pump body draws the cleaned oil filtered above the support plate through the oil passage hole and transports it to the oil collection box through the short pipe, achieving directional transfer of the filtered oil. Both oil outlets on both sides of the oil collection box are connected to flexible bends, which divide the cleaned oil in the oil collection box into two paths and deliver it to the nozzles on both sides of the tank. Adapting to the oscillation action of the nozzles, it achieves simultaneous oil reinjection and cleaning operations on both sides.

[0006] The other end of the bend is connected to a nozzle, which sprays the delivered cleaning oil into the inner cavity of the wind turbine gearbox to complete the reinjection of the filtered oil. At the same time, it can flush and clean the impurities deposited at the bottom of the gearbox cavity. The nozzle is covered with a rubber sleeve, which is used to seal with the oil inlet of the wind turbine gearbox. It can fill the assembly gap between the nozzle and the oil inlet of the wind turbine gearbox to achieve a sealed connection and prevent leakage during oil spraying and reinjection. Both sides of the tank are equipped with drive mechanisms, each including a rotor. A crossbar is coaxially connected to the shaft of the rotor, extending into the inner cavity of the tank and fixedly connected to the impeller. When the impeller rotates, the crossbar synchronously drives the rotor to rotate, transmitting the rotational mechanical energy output by the impeller to the drive mechanism outside the tank. This eliminates the need for an additional power source to drive the nozzle oscillation, reducing energy consumption and manufacturing costs. A round rod is eccentrically connected to the outer end face of the rotor, slidingly passing through a vertical groove in a square slot block. The rotor drives the eccentrically positioned round rod to perform circular motion. Through the sliding engagement of the round rod within the groove of the square slot block, the rotational motion of the rotor is converted into a circular motion. The horizontal reciprocating linear motion of the long square slot block completes the motion transformation. A telescopic rod is rotatably connected to the end face of the long square slot block away from the tank body. A support arm is provided between the telescopic rod and the tank body. One end of the support arm is fixedly installed on the outer wall of the tank body, and the other end is hinged to the body of the telescopic rod. The support arm provides a swing support fulcrum for the telescopic rod, forming a lever swing structure. The other end of the telescopic rod is rotatably connected to the bottom of the nozzle. The horizontal reciprocating motion of the long square slot block drives the telescopic rod to swing back and forth around the hinge point of the support arm, thereby driving the nozzle to swing in pitch synchronously, expanding the spray coverage of the nozzle, and improving the cleaning uniformity and cleaning effect on the bottom of the wind turbine gearbox cavity.

[0007] Preferably, the top of the oil inlet pipe is provided with a flange, which facilitates quick flange connection between the oil inlet pipe and the oil outlet of the wind turbine gearbox, improving the ease of disassembly and assembly and the sealing performance of the connection. The bottom of the support plate is connected to the oil outlet pipe, and the outside of the oil outlet pipe is provided with a valve. After the oil change operation is completed, the valve can be opened to discharge the residual waste oil and sediment impurities in the tank through the oil outlet pipe, which facilitates the emptying, cleaning and maintenance of the device.

[0008] Preferably, the top of the support plate is threadedly connected to a flow guide housing, which covers the outside of the motor. It can guide and collect the oil ejected by the centrifugal filter cartridge, directing the oil to the oil passage hole of the support plate. At the same time, it forms a protective isolation for the motor, preventing the oil from directly flushing and seeping into the motor and causing damage to the components. Furthermore, a bearing is provided between the flow guide housing and the output shaft of the motor, improving the smoothness of the motor output shaft rotation and achieving a sealed separation of the rotating parts, further preventing the oil from entering the motor.

[0009] Preferably, the top of the flow guide shell is provided with an annular groove, and a ball bearing is rolled inside the annular groove. The ball bearing supports the bottom of the filter cartridge, and the rolling support of the ball bearing provides auxiliary support to the bottom of the filter cartridge, reducing the frictional resistance when the filter cartridge rotates at high speed, while improving the coaxiality and stability of the filter cartridge rotation, and preventing the filter cartridge from swaying or shaking during rotation.

[0010] Preferably, the inner cavity of the tank is provided with a guide plate, which is located directly above the filter cartridge. The guide plate can guide and buffer the oil falling after being turbulent by the impeller, so that the oil falls into the filter cartridge evenly and smoothly, avoiding damage to the filter material caused by the oil directly impacting the side wall of the filter cartridge at high speed. At the same time, it ensures the uniformity of centrifugal filtration. The impeller is located directly below the oil inlet pipe, so that the oil flowing out of the oil inlet pipe can vertically impact the blades of the impeller, maximizing the use of the kinetic energy of the oil flow to drive the impeller to rotate and improving the power conversion efficiency.

[0011] Preferably, a handle is welded to the bottom of the base plate, and the handle is provided with an anti-slip sleeve, which facilitates the operator to grip and rotate the base plate, enabling quick screwing and unscrewing. The anti-slip sleeve increases grip friction and prevents slippage during operation. The top of the oil collection box is connected to the support plate via a bracket, improving the installation stability and positional accuracy of the oil collection box and preventing displacement and detachment during base plate removal. The oil outlet of the oil collection box is connected to the bend pipe via a connecting pipe, and an oil pump is installed between the connecting pipe and the oil collection box. The oil pump provides pressurization power for oil delivery, increasing the pressure and flow rate of the oil delivered to the nozzle, thereby enhancing the spray impact and cleaning effect of the nozzle.

[0012] Preferably, a control module is externally mounted on the tank body. This control module is electrically connected to both a communication module and a power module. The control module can uniformly regulate the start / stop and speed of the motor, pump body, and oil pump. The communication module enables remote transmission and online monitoring of the device's operating data. The power module provides a stable power supply to all electrical components of the device. The motor is fixedly mounted on the top of the support plate via a bracket, improving the motor's mounting stability and coaxiality, reducing vibration during motor operation, and ensuring the stability of the filter cartridge rotation.

[0013] Preferably, the square slotted block has a sliding groove inside, and the round rod is slidably disposed in the sliding groove. The sliding groove limits and guides the movement trajectory of the round rod, ensuring the stability and accuracy of the conversion from rotational motion to linear reciprocating motion, and preventing the round rod from derailing or deviating during its movement.

[0014] Preferably, the upper and lower ends of the square groove block are provided with track blocks, the track blocks are slidably connected to the track blocks, and the track blocks are fixedly set on the outer wall of the tank. Through the sliding cooperation between the track blocks and the track blocks, the horizontal reciprocating motion of the square groove block is provided with bidirectional guidance and support, which improves the stability of the square groove block's movement and avoids vertical swaying and jamming during the movement.

[0015] Preferably, a bearing is provided between the crossbar and the side wall of the tank to reduce frictional resistance during crossbar rotation and provide radial support, ensuring the coaxiality and stability of the crossbar transmission. A seated bearing is provided at the connection between the telescopic rod and the support arm to ensure smooth swing of the telescopic rod, reduce wear at the hinge, and extend the service life of the transmission structure. The rubber sleeve is embedded in the oil inlet of the wind turbine gearbox, and the nozzle can extend into the inner cavity of the wind turbine gearbox, ensuring that the nozzle can directly spray the cleaning oil onto the area to be cleaned inside the gearbox. At the same time, the rubber sleeve seals the oil inlet to prevent oil leakage.

[0016] Compared with the prior art, the present invention provides a wind turbine gearbox oil replacement filter device, which has the following beneficial effects: This wind turbine gearbox oil replacement filter device uses an impeller installed in the inner cavity of the tank, which can be directly driven by the inlet oil flow. Combined with a transmission mechanism consisting of a crossbar, a rotating wheel, a round rod, a square groove block, and a telescopic rod, it can convert the kinetic energy of the oil flow into the driving force for the nozzle oscillation. There is no need to configure an independent power source and control circuit for the nozzle oscillation, which effectively reduces the operating energy consumption and manufacturing cost of the device. At the same time, it simplifies the overall structure of the device and reduces the difficulty of on-site installation, commissioning, and subsequent maintenance.

[0017] The hydraulically driven transmission mechanism drives the nozzle to reciprocate and tilt, which can effectively expand the spray coverage of the nozzle, eliminate cleaning dead spots in the bottom corners and low-lying areas of the gearbox cavity, and allow the cleaning oil to fully flush away the sludge and metal debris deposited at the bottom and carry them out with the circulating oil, significantly improving the cleaning uniformity and overall cleaning effect of the oil change operation. Attached Figure Description

[0018] Figure 1 This is a front view of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a schematic diagram of the external appearance of the nozzle of the present invention; Figure 4 This is a partially enlarged schematic diagram of the driving mechanism of the present invention; Figure 5 This is a schematic diagram of the external appearance of the filter cartridge of the present invention.

[0019] In the diagram: 1. Tank body; 11. Oil inlet pipe; 12. Guide plate; 2. Drive mechanism; 21. Rotary wheel; 22. Round rod; 23. Crossbar; 24. Square groove long block; 25. Track block; 26. Track long block; 27. Telescopic rod; 28. Support arm; 3. Nozzle; 31. Rubber sleeve; 32. Bend; 33. Connecting pipe; 4. Impeller; 5. Filter cartridge; 51. Motor; 52. Support plate; 53. Guide shell; 54. Short pipe; 55. Oil collection box; 56. Pump body; 6. Base plate; 61. Handle. Detailed Implementation

[0020] This invention provides a technical solution; please refer to [link / reference]. Figure 1 and Figure 2 A wind turbine gearbox oil replacement and filtration device includes a tank body 1 and an oil inlet pipe 11. The oil inlet pipe 11 is located at the oil inlet of the tank body 1 and is used to connect to the oil outlet of the wind turbine gearbox. The oil to be filtered and replaced is introduced into the tank body 1, forming an input passage for oil circulation filtration. An impeller 4 is rotatably installed in the inner cavity of the tank body 1. It is driven to rotate by the impact of the oil flowing in through the oil inlet pipe 11, converting the kinetic energy of the oil flow into rotational mechanical energy. It can provide driving force for the drive mechanism 2 without the need for an additional power source, and at the same time, it turbulently disperses the flowing oil. A support plate 52 is fixedly connected to the inner cavity of the tank body 1, providing a mounting support base for the filtration and power components inside the tank body 1, and dividing the inner cavity of the tank body 1 into an upper filtration chamber and a lower oil collection chamber. A motor 51 is installed on the top of the support plate 52. The output end of the motor 51 is connected to a filter cartridge 5. The motor 51 drives the filter cartridge 5 to rotate at high speed to generate centrifugal force, so that the oil passes through the filter holes of the filter cartridge 5 to complete solid-liquid separation and remove metals in the oil. Debris, sludge, and other impurities are trapped inside the filter cartridge 5, achieving efficient centrifugal filtration of the oil. A bottom plate 6 is threadedly connected to the bottom of the tank 1, employing a threaded, detachable connection structure. This allows for easy unscrewing of the bottom plate 6 to maintain, clean, and remove impurities from components such as the filter cartridge 5 and oil collection box 55 inside the tank 1. An oil collection box 55 is located at the top of the bottom plate 6 to temporarily store the cleaned oil after filtration, providing a stable oil source for subsequent oil reinjection into the gearbox. A short pipe 54 connects to the oil inlet of the oil collection box 55. The other end of the short pipe 54 is connected to the pump body 56. The oil inlet of the pump body 56 is connected to the oil passage hole on the support plate 52. The pump body 56 draws the cleaned oil that has been filtered above the support plate 52 through the oil passage hole and transports it to the oil collection box 55 through the short pipe 54 to realize the directional transfer of the filtered oil. Both sides of the oil collection box 55 are connected to the elbow pipe 32, which divides the cleaned oil in the oil collection box 55 into two paths and transports it to the nozzles 3 on both sides of the tank 1 to realize the synchronous oil return and cleaning operation on both sides.

[0021] Please see Figure 3 and Figure 4The other end of the bend 32 is connected to a nozzle 3, which sprays the delivered cleaning oil into the inner cavity of the wind turbine gearbox to complete the reinjection of the filtered oil. At the same time, it can flush and clean the impurities deposited at the bottom of the gearbox cavity. The nozzle 3 is covered with a rubber sleeve 31, which is used to seal with the oil inlet of the wind turbine gearbox. It can fill the assembly gap between the nozzle 3 and the oil inlet of the wind turbine gearbox to achieve a sealed connection and prevent leakage during oil spraying and reinjection. Both sides of the tank body 1 are equipped with drive mechanisms 2. The drive mechanism 2 includes a rotating wheel 21. A crossbar 23 is coaxially connected to the axis of the rotating wheel 21. The crossbar 23 extends into the inner cavity of the tank body 1 and is fixedly connected to the impeller 4. When the impeller 4 rotates, it drives the rotating wheel 21 to rotate synchronously through the crossbar 23, transmitting the rotational mechanical energy output by the impeller 4 to the drive mechanism 2 outside the tank body 1. This allows the nozzle 3 to swing without the need for an additional power source, reducing energy consumption and manufacturing costs. A round rod 22 is eccentrically connected to the outer end face of the rotating wheel 21. The round rod 22 slides through the square groove block 24. The rotating wheel 21 drives the eccentrically positioned round rod 22 to perform circular motion. The round rod 22 moves through the square groove block 24. The sliding mechanism converts the rotational motion of the rotating wheel 21 into the horizontal reciprocating linear motion of the square groove block 24, thus completing the motion transformation. A telescopic rod 27 is rotatably connected to the outer side of the square groove block 24. A support arm 28 is provided between the telescopic rod 27 and the tank 1. The support arm 28 provides a swing support fulcrum for the telescopic rod 27, forming a lever swing structure. The other end of the telescopic rod 27 is rotatably connected to the bottom of the nozzle 3. The horizontal reciprocating motion of the square groove block 24 drives the telescopic rod 27 to swing back and forth around the hinge point of the support arm 28, thereby driving the nozzle 3 to swing in pitch synchronously, expanding the spray coverage of the nozzle 3 and improving the cleaning uniformity and cleaning effect on the bottom of the wind turbine gearbox cavity.

[0022] Please see Figure 4 and Figure 5 The top of the oil inlet pipe 11 is equipped with a flange, which facilitates quick flange connection between the oil inlet pipe 11 and the oil outlet of the wind turbine gearbox, improving the ease of disassembly and assembly and the sealing of the connection. The bottom of the support plate 52 is connected to the oil outlet pipe, and a valve is installed on the outside of the oil outlet pipe. The valve can be opened after the oil replacement operation is completed to discharge the residual waste oil and sediment impurities in the tank 1 through the oil outlet pipe, which facilitates the emptying, cleaning and maintenance of the device.

[0023] The top of the support plate 52 is threadedly connected to a flow guide housing 53, which covers the outside of the motor 51. It can guide and collect the oil ejected by the centrifugal filter cartridge 5 and guide the oil to the oil passage hole of the support plate 52. At the same time, it forms a protective isolation for the motor 51 to prevent the oil from directly flushing and seeping into the motor 51 and causing damage to the components. In addition, a bearing is provided between the flow guide housing 53 and the output shaft of the motor 51 to improve the smoothness of the rotation of the output shaft of the motor 51, and at the same time to achieve the sealing and separation of the rotating parts, further preventing the oil from entering the motor 51.

[0024] The top of the flow guide housing 53 is provided with an annular groove, and a ball bearing is rolled inside the annular groove. The ball bearing supports the bottom of the filter cartridge 5. The rolling support of the ball bearing provides auxiliary support for the bottom of the filter cartridge 5, reduces the frictional resistance when the filter cartridge 5 rotates at high speed, and improves the coaxiality and stability of the rotation of the filter cartridge 5, preventing the filter cartridge 5 from swaying and shaking during rotation.

[0025] The inner cavity of the tank body 1 is equipped with a guide plate 12, which is located directly above the filter cartridge 5. The guide plate 12 can guide and buffer the oil that falls after being turbulent by the impeller 4, so that the oil falls into the filter cartridge 5 evenly and smoothly, avoiding the oil directly impacting the side wall of the filter cartridge 5 at high speed and causing damage to the filter material. At the same time, it ensures the uniformity of centrifugal filtration. The impeller 4 is located directly below the oil inlet pipe 11, so that the oil flowing out of the oil inlet pipe 11 can vertically impact the blades of the impeller 4, maximizing the use of the kinetic energy of the oil flow to drive the impeller 4 to rotate and improving the power conversion efficiency.

[0026] A handle 61 is welded to the bottom of the base plate 6. The handle 61 is fitted with an anti-slip sleeve, allowing operators to grip and apply force to rotate the base plate 6, enabling quick screwing and unscrewing. The anti-slip sleeve increases grip friction, preventing slippage during operation. The top of the oil collection box 55 is connected to the support plate 52 via a bracket, improving the installation stability and positional accuracy of the oil collection box 55 and preventing displacement or detachment during base plate 6 assembly / disassembly. The oil outlet of the oil collection box 55 is connected to the bend pipe 32 via a connecting pipe 33. An oil pump is installed between the connecting pipe 33 and the oil collection box 55, providing pressurized power for oil delivery, increasing the pressure and flow rate of the oil delivered to the nozzle 3, and enhancing the spray impact and cleaning effect of the nozzle 3.

[0027] A control module is installed on the outside of the tank body 1. The control module is electrically connected to a communication module and a power module. The control module can uniformly regulate the start-up, shutdown, speed, and other operating states of the motor 51, pump body 56, and oil pump. The communication module can realize remote transmission and online monitoring of the device's operating data. The power module provides a stable power supply for all electrical components of the device. The motor 51 is fixedly installed on the top of the support plate 52 by a bracket, which improves the installation firmness and coaxiality of the motor 51, reduces the vibration of the motor 51 during operation, and ensures the stability of the rotation of the filter cartridge 5.

[0028] The square slotted block 24 has a sliding groove inside, and the round rod 22 is slidably set in the sliding groove. The sliding groove limits and guides the movement trajectory of the round rod 22, ensuring the stability and accuracy of the conversion from rotary motion to linear reciprocating motion, and preventing the round rod 22 from derailing during the movement.

[0029] Both ends of the square channel block 24 are provided with track blocks 25, and the track blocks 25 are slidably connected to the track blocks 26. The track blocks 26 are fixedly set on the outer wall of the tank body 1. Through the sliding cooperation between the track blocks 25 and the track blocks 26, the horizontal reciprocating motion of the square channel block 24 is provided with bidirectional guidance and support, which improves the stability of the movement of the square channel block 24 and avoids vertical swaying and jamming during the movement.

[0030] A bearing is installed between the crossbar 23 and the side wall of the tank 1 to reduce the frictional resistance when the crossbar 23 rotates, and at the same time to provide radial support for the crossbar 23, ensuring the coaxiality and stability of the transmission of the crossbar 23. A seated bearing is installed at the connection between the telescopic rod 27 and the support arm 28 to ensure the smooth swing of the telescopic rod 27, reduce wear at the hinge, and improve the service life of the transmission structure. The rubber sleeve 31 is embedded in the oil inlet of the wind turbine gearbox, and the nozzle 3 can be inserted into the inner cavity of the wind turbine gearbox, ensuring that the nozzle 3 can directly spray the cleaning oil into the area to be cleaned inside the gearbox. At the same time, the rubber sleeve 31 seals the oil inlet to prevent oil from overflowing.

[0031] This scheme connects the oil inlet pipe 11 to the oil outlet of the wind turbine gearbox. The rubber sleeve 31 is set on the outside of the wind turbine gearbox, so that the nozzle 3 faces the bottom of the inner cavity of the wind turbine gearbox. The grease drives the impeller 4 to rotate and then falls into the inner cavity of the filter cartridge 5. The motor 51 is started to drive the filter cartridge 5 to rotate. The grease is filtered by centrifugal force. The filtered grease falls on the top of the support plate 52. The pump body 56 is started to suck the grease into the inner cavity of the oil collection box 55 through the short pipe 54. Then, through the bend pipe 32, the grease is discharged back into the bottom of the inner cavity of the wind turbine gearbox through the nozzle 3 to clean the bottom of the inner cavity of the wind turbine gearbox and the outside of the impeller 4. At the same time, the impeller 4 drives the rotor 21 to rotate through the crossbar 23. The rotor 21 drives the square groove block 24 to move back and forth left and right through the round rod 22. Finally, the nozzle 3 is driven to rotate through the telescopic rod 27.

Claims

1. A wind turbine gearbox oil replacement and filtration device, comprising a tank (1) and an oil inlet pipe (11), wherein the oil inlet pipe (11) is disposed at the oil inlet of the tank (1), characterized in that: An impeller (4) is rotatably installed in the inner cavity of the tank (1). A support plate (52) is fixedly connected to the inner cavity of the tank (1). A motor (51) is installed on the top of the support plate (52). A filter cartridge (5) is connected to the output end of the motor (51). A bottom plate (6) is threadedly connected to the bottom of the tank (1). An oil collection box (55) is installed on the top of the bottom plate (6). A short pipe (54) is connected to the oil inlet of the oil collection box (55). A pump body (56) is connected to the other end of the short pipe (54). The oil inlet of the pump body (56) is connected to the oil passage hole on the support plate (52). Both oil outlets on both sides of the oil collection box (55) are connected to bent pipes (32). The other end of the bend (32) is connected to a nozzle (3). The nozzle (3) is fitted with a rubber sleeve (31) which is used to seal with the oil filling port of the wind turbine gearbox. Both sides of the tank (1) are provided with drive mechanisms (2). The drive mechanism (2) includes a wheel (21). A crossbar (23) is coaxially connected to the axis of the wheel (21). The crossbar (23) extends into the inner cavity of the tank (1) and is fixedly connected to the impeller (4). A round rod (22) is eccentrically connected to the outer end face of the wheel (21). The round rod (22) slides through the square groove block (24). A telescopic rod (27) is rotatably connected to the outer side of the square groove block (24). A support arm (28) is provided between the telescopic rod (27) and the tank (1). The other end of the telescopic rod (27) is rotatably connected to the bottom of the nozzle (3).

2. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: The top of the oil inlet pipe (11) is provided with a flange, the bottom of the support plate (52) is connected to an oil outlet pipe, and a valve is provided on the outside of the oil outlet pipe.

3. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: The top of the support plate (52) is threadedly connected to a flow guide housing (53), which covers the outside of the motor (51), and a bearing is provided between the flow guide housing (53) and the output shaft of the motor (51).

4. The wind turbine gearbox oil replacement filter device according to claim 3, characterized in that: The top of the flow guide housing (53) is provided with an annular groove, and the inner cavity of the annular groove is provided with rolling balls, which are supported by the bottom of the filter cartridge (5).

5. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: The inner cavity of the tank (1) is provided with a guide plate (12), which is located directly above the filter cartridge (5), and the impeller (4) is located directly below the oil inlet pipe (11).

6. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: The bottom of the base plate (6) is welded with a handle (61), and the handle (61) is provided with an anti-slip sleeve; the top of the oil collection box (55) is connected to the support plate (52) through a bracket, the oil outlet of the oil collection box (55) is connected to the bend pipe (32) through a connecting pipe (33), and an oil pump is provided between the connecting pipe (33) and the oil collection box (55).

7. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: The tank (1) is equipped with a control module on its exterior. The control module is electrically connected to a communication module and a power module. The motor (51) is fixedly installed on the top of the support plate (52) by a bracket.

8. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: The square groove block (24) has a sliding groove inside, and the round rod (22) is slidably disposed in the sliding groove.

9. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: Both ends of the square groove block (24) are provided with track blocks (25), the track blocks (25) are slidably connected to the track blocks (26), and the track blocks (26) are fixedly set on the outer wall of the tank (1).

10. The wind turbine gearbox oil replacement filter device according to claim 1, characterized in that: A bearing is provided between the crossbar (23) and the side wall of the tank (1), and a seated bearing is provided at the connection between the telescopic rod (27) and the support arm (28); the rubber sleeve (31) is embedded in the oil inlet of the wind turbine gearbox, and the nozzle (3) can be inserted into the inner cavity of the wind turbine gearbox.

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