Oil filtering device for lubricating oil of wind power gear box

Abstract

The invention discloses an oil filtering device for wind power gear box lubricating oil. The oil filtering device comprises a barrel body, a cover plate, a center shaft, a magnetic bar, an uncovering assembly and a centrifugal barrel. The centrifugal barrel comprises a centrifugal barrel wall, a centrifugal barrel bottom and a limiting assembly; a thrust bearing is arranged at the bottom of the centrifugal barrel; the centrifugal barrel wall and the centrifugal barrel bottom are connected through a limiting assembly. The barrel body is provided with an oil outlet and a second hydraulic cylinder; the cover plate is provided with an oil inlet and a motor; the uncovering assembly is located at the top end of the cover plate. A lower limit plate is arranged at the bottom of the centrifugal barrel; the center shaft is provided with a lifting ring, an elastic spring, a semicircular scraping plate and a linkage assembly. The magnetic bars are positioned on two sides of the central shaft; the semicircular scraping plate is sleeved on the magnetic bar; the lifting ring is connected with the semicircular scraping plate through a linkage assembly; centrifugal filtration and magnetic adsorption filtration are integrated, the cleaning driving mechanism composed of the second hydraulic cylinder, the lower limit plate, the lifting ring and the linkage assembly is combined to drive the semicircular scraping plate to conduct scraping and cleaning, and the overall continuous operation reliability is high.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil filtration technology, specifically to an oil filtration device for lubricating oil in wind turbine gearboxes. Background Technology

[0002] The wind turbine gearbox, also known as a speed increaser, is the core transmission component of doubly-fed and semi-direct-drive wind turbine units. Installed between the rotor and the generator, its function is to convert the "low-speed, high-torque" mechanical energy captured by the blades into the "high-speed, low-torque" power required by the generator, achieving a smooth transition from wind energy to mechanical energy to electrical energy, thus enabling efficient power generation. The lubricating oil used in the gearbox plays a crucial role in lubrication, heat dissipation, cleaning, and corrosion prevention, affecting its service life. The lubricating oil filter removes impurities from the lubricating oil, ensuring normal equipment operation and extending the lubricating oil's lifespan.

[0003] Currently, the filtration of lubricating oil in wind turbine gearboxes commonly employs a filtration system consisting of a coarse filter and a fine filter connected in series, or integrated filtration equipment. Common filtration technologies include screen filtration, cartridge filtration, centrifugal filtration, and magnetic filtration. Among these, centrifugal filters rely on centrifugal force to separate solid particles with a density greater than that of the oil, offering high throughput and resistance to clogging. However, their effectiveness in separating fine particles, especially small ferromagnetic wear debris, is limited. Magnetic filters, on the other hand, can efficiently adsorb ferromagnetic particles. However, traditional magnetic rod or grid structures require shutdown and disassembly for manual cleaning after adsorption saturation, a cumbersome process that interrupts filtration and affects the system's continuous protection capabilities. Summary of the Invention

[0004] The purpose of this invention is to provide an oil filter device for lubricating oil in wind turbine gearboxes that features dual filtration, online automatic self-cleaning, and convenient and rapid maintenance. This device addresses the technical problems of existing filtration solutions, such as the limited removal effect of centrifugal filtration on fine iron filings, the need for manual cleaning of magnetic filtration requiring shutdown leading to maintenance interruptions and inconvenience, and the cumbersome maintenance of traditional devices.

[0005] To solve the above technical problems, the present invention adopts the following solution: An oil filtration device for lubricating oil in wind turbine gearboxes includes a barrel body, a cover plate, a central shaft, several magnetic rods, a cover opening assembly, and a centrifugal barrel. The centrifugal barrel is located inside the barrel body and includes a barrel wall, a barrel bottom, and a limiting assembly. The barrel bottom is equipped with a thrust bearing. The barrel wall and the central shaft are connected to the barrel bottom via the limiting assembly. The barrel bottom is rotated by the central shaft. The barrel body has an oil outlet and a second hydraulic cylinder. The oil outlet is located on one side of the lower end of the barrel body. The second hydraulic cylinder is fixedly installed on the outer bottom end of the barrel body, with its telescopic end extending into the barrel body and connected to the barrel bottom via the thrust bearing. The second hydraulic cylinder supports the barrel bottom, and the thrust bearing facilitates the rotation of the barrel bottom by the central shaft. The cover plate has an oil inlet and a motor. The machine is fixedly installed at the top center of the cover plate, and its output end is fixedly connected to the central shaft; the oil inlet is located on the left side of the cover plate; the cover opening assembly is fixedly installed at the top of the cover plate, and its two ends are connected to the barrel body; the bottom of the centrifuge barrel is provided with a lower limit plate; the central shaft is provided with a lifting ring, an elastic spring, a semi-circular scraper, and a linkage assembly; the lifting ring is sleeved on the upper end of the central shaft; the upper end of the elastic spring is fixedly connected to the upper end of the central shaft, and the lower end is fixedly connected to the lifting ring; the lower limit plate is fixedly installed at the bottom of the centrifuge barrel, and its upper end contacts the lifting ring; several magnetic rods are symmetrically installed on both sides of the central shaft; several semi-circular scrapers are provided, symmetrically sleeved on the magnetic rods; the lifting ring is connected to the semi-circular scraper through the linkage assembly.

[0006] This device is equipped with valves at both the oil inlet and outlet. The entire system is controlled by an external control system powered by an external power source. The valves at the inlet and outlet control the flow of lubricating oil into the container. A level sensor is installed inside the container to detect the lubricating oil level. The oil flow rate at the outlet matches the oil flow rate at the inlet, ensuring a stable liquid level in the container and a sufficiently long oil residence time to ensure that impurities are effectively centrifuged out. During filtration, the lower limit plate rests against the lifting ring, causing the elastic spring to be in a contracted state. The two semi-circular scraping plates symmetrically mounted on the magnetic rod can be joined together to form a single circular scraping plate using a tenon and mortise structure. Several holes are provided on the centrifuge container to facilitate the outflow of the centrifuged lubricating oil.

[0007] In operation, the external control system extends the second hydraulic rod, pushing the bottom of the centrifuge tank upwards, bringing the tank wall closer to the cover plate. Simultaneously, the oil inlet valve opens, allowing lubricating oil to enter the tank. Once the lubricating oil level reaches the working level, the motor is started. The motor's rotation drives the central shaft, which in turn rotates the bottom and walls of the centrifuge tank. Under centrifugal force, impurities with a density greater than the oil and larger particles are thrown towards the inner wall of the tank. The purified lubricating oil overflows through the holes in the tank and is stored at the bottom. As the motor rotates the centrifuge tank via the central shaft, the magnetic rod on the shaft also rotates, agitating the lubricating oil and adsorbing fine particles within it. Ferromagnetic metal abrasives are filtered simultaneously through centrifugal filtration and magnetic adsorption filtration to ensure the filtration effect of the lubricating oil. After the motor is started for a period of time, the oil outlet is opened through the valve to allow the filtered lubricating oil to flow out, realizing the oil inlet-filtration-outlet circulation system. After the central shaft drives the bottom of the barrel to rotate for a period of time, the second hydraulic rod retracts, causing the bottom of the centrifugal barrel to descend and detach from the central shaft. Without the drive of the central shaft, the bottom of the centrifugal barrel gradually stops rotating, causing the lower limit plate to gradually move away from the lifting ring. The spring resets and pushes the lifting ring downward, causing the linkage component at the bottom of the lifting ring to push the circular scraper composed of two semi-circular scraper plates to move outward on the surface of the magnetic rod, scraping all the magnetic rods clean, realizing self-cleaning. The scraped-off rust impurities settle at the bottom of the centrifugal barrel. When the external control system detects that the device has run for a set time, it closes the oil inlet valve to stop oil intake and shuts off the motor. The filtered and purified lubricating oil in the tank is drained through the oil outlet. The cover is opened by the cover opening device. As the cover rises, the lifting ring gradually disengages from the lower limit plate. At this time, the spring returns to its original position and pushes the lifting ring. The lifting ring, through the linkage component, pushes the circular scraper composed of two semi-circular scraping plates to move on the surface of the magnetic rods, scraping all the magnetic rods clean at the same time, achieving self-cleaning. The staff only needs to clean the walls and bottom of the centrifuge tank. After cleaning, the cover is reset, closed, and then restarted.

[0008] Furthermore, the lid-opening assembly includes a support frame, a first hydraulic rod, and a U-shaped frame; the support frame and the U-shaped frame are inverted U-shapes; both ends of the support frame are fixedly installed on the barrel body; both ends of the U-shaped frame are fixedly installed on both sides of the motor on the cover plate; the first hydraulic rod is fixedly installed in the middle of the support frame, and its telescopic end is connected to the top of the U-shaped frame. The inverted U-shaped support frame serves as the fixed base and load-bearing frame of the entire lid-opening assembly, with its two ends rigidly connected to the barrel body, providing stable support. The U-shaped frame, also inverted U-shape, is fitted above the motor and fixedly connected to the cover plate. The support frame and the U-shaped frame are connected by the first hydraulic rod. When the cover plate needs to be opened, the telescopic rod of the first hydraulic rod retracts, causing the U-shaped frame to rise, thereby driving the cover plate to rise and opening the barrel body.

[0009] Furthermore, the limiting component includes a first upper locking block, a second upper locking block, a first lower locking groove, and a second lower locking groove; four first upper locking blocks are provided and symmetrically installed at the bottom of the centrifuge barrel wall; the first lower locking grooves are opened around the bottom of the centrifuge barrel and match the first upper locking blocks; the second upper locking block is fixedly installed at the bottom of the central shaft; the second lower locking groove is opened in the middle of the bottom of the centrifuge barrel and matches the second upper locking block.

[0010] The centrifuge tank bottom and centrifuge tank wall are detachably connected by the first upper locking block and the first lower locking slot, which facilitates disassembly and installation when cleaning or repairing the centrifuge tank. The central shaft is connected to the second upper locking block and the second locking slot, which allows the central shaft to drive the centrifuge tank bottom to rotate, thereby driving the centrifuge tank wall to rotate for centrifugal filtration.

[0011] Furthermore, the cover plate is equipped with two spiral scrapers; the spiral scrapers are symmetrically installed at the bottom end of the cover plate and match the centrifuge barrel wall. When the central shaft drives the bottom of the centrifuge barrel to rotate, it drives the centrifuge barrel wall to rotate. When the centrifuge barrel wall rotates, the spiral scrapers act like a "scraper," sweeping the deposits on the centrifuge barrel wall to the bottom, preventing impurities from clogging the pores on the inner wall of the centrifuge barrel, and improving the filtration effect of this device.

[0012] Furthermore, the linkage assembly includes lifting blocks and rotating plates; four lifting blocks are provided, symmetrically installed in pairs on the front and rear sides of the lifting ring; one end of the rotating plate is rotatably connected to the lifting blocks, and the other end is rotatably connected to the semi-circular scraping plate; the top of the lower limit plate contacts the upper limit block. The width between the pairs of symmetrical lifting blocks is slightly larger than the width of the lower limit plate. When the cover plate rises or the bottom of the centrifuge tank descends, the elastic spring resets, pushing the lifting ring downwards. The lifting blocks move downwards under the action of the lifting ring. One end of the rotating plate is rotatably connected to the lifting blocks, and the other end is rotatably connected to the semi-circular scraping plate. Therefore, when the rotating plate descends, the angle between the lifting blocks and the rotating plate increases, gradually approaching a perpendicular state, thereby causing the semi-circular scraping plate to slide on the surface of the magnetic rod, scraping off the iron filings.

[0013] Furthermore, the lifting ring is provided with an upper limit block; there are two upper limit blocks, which are fixedly installed on the front and rear sides of the lifting ring. The lower limit plate contacts the lifting ring through the upper limit blocks, and when the upper limit blocks contact the lower limit plate, they push the lifting ring to compress the spring.

[0014] Furthermore, the semi-circular scraping plate is provided with horizontal limiting rods and limiting rings; the limiting rings are fixed to the end of the magnetic rod away from the central axis; several horizontal limiting rods are provided, surrounding the magnetic rod, with one end passing through the semi-circular scraping plate and connecting to the central axis, and the other end connecting to the limiting rings. The horizontal limiting rods provide radial guidance for the semi-circular scraping plate, allowing the scraping plate to move along the limiting rods to scrape the magnetic rod, preventing the scraping plate from deviating. At the same time, the limiting rings can effectively prevent the semi-circular scraping plate from detaching from the horizontal limiting rods.

[0015] The working principle of this invention is as follows: In operation, the external control system extends the second hydraulic rod, pushing the bottom of the centrifuge tank upwards, bringing the tank wall closer to the cover plate. Simultaneously, the oil inlet valve opens, allowing lubricating oil to enter the tank. Once the lubricating oil level reaches the working level, the motor is started. The motor's rotation drives the central shaft, which in turn rotates the bottom and wall of the centrifuge tank, connected by the first upper and lower locking blocks. Under centrifugal force, impurities with a density greater than the oil and larger particles are thrown towards the inner wall of the centrifuge tank. The purified lubricating oil overflows through the holes in the tank and is stored at the bottom. As the motor rotates the centrifuge tank via the central shaft, the magnetic rod on the shaft also rotates, agitating the lubricating oil and adsorbing fine ferromagnetic metal shavings. This achieves dual filtration through centrifugal and magnetic adsorption. Meanwhile, a spiral scraper sweeps deposits from the tank wall to the bottom. To prevent impurities from clogging the pores on the inner wall of the centrifuge tank and ensure the filtration effect of the lubricating oil, after the motor has been running for a period of time, the oil outlet is opened through the valve to allow the filtered lubricating oil to flow out through the oil outlet, realizing the oil-in-filtration-out-oil circulation system; after the central shaft drives the bottom of the tank to rotate for a period of time, the second hydraulic rod retracts, causing the bottom of the centrifuge tank to descend and detach from the central shaft. Without the drive of the central shaft, the bottom of the centrifuge tank gradually stops rotating, causing the lower limit plate to gradually move away from the upper limit block of the lifting ring. The spring resets and pushes the lifting ring downwards. The lifting block moves downwards under the drive of the lifting ring. One end of the rotating plate is rotatably connected to the lifting block, and the other end is rotatably connected to the semi-circular scraper plate. Therefore, when the rotating plate descends, the angle between the lifting block and the rotating plate increases and gradually tends to be vertical, thereby driving the semi-circular scraper plate to slide on the surface of the magnetic rod through the horizontal limit rod, scraping all the magnetic rods clean, realizing self-cleaning. The scraped-off rust impurities settle at the bottom of the centrifuge tank; When the external control system detects that the device has run for a set time, it closes the oil inlet valve to stop oil intake and shuts off the motor. The filtered and purified lubricating oil in the tank is drained through the oil outlet. The control system then controls the extension rod of the first hydraulic rod to retract, causing the U-shaped frame to rise, which in turn drives the cover plate to rise and open the tank. During the rise of the cover plate, the lifting ring gradually disengages from the lower limit plate. At this time, the spring returns to its original position and pushes the lifting ring. Through the lifting ring and the linkage component, the lifting ring pushes the circular scraper composed of two semi-circular scraper plates to move on the surface of the magnetic rods, scraping all the magnetic rods clean at the same time, achieving self-cleaning. The staff only needs to clean the walls and bottom of the centrifuge tank. After cleaning, the system resets, extends and closes the cover plate, and then restarts the system.

[0016] The beneficial effects of this invention are as follows: 1. This invention combines centrifugal separation filtration with magnetic adsorption filtration to form a dual filtration system. A semi-circular scraper is installed on the magnetic rod for scraping. The semi-circular scraper, combined with a self-cleaning drive mechanism consisting of a second hydraulic cylinder, a lower limit plate, a lifting ring, and linkage components, can remove ferromagnetic impurities adsorbed by the magnetic rod without turning on the machine. This achieves online, synchronous, and thorough magnetic rod cleaning, significantly improving the overall filtration effect and the continuity of equipment operation, reducing maintenance frequency and workload, and ensuring the long-term reliable operation of the wind turbine gearbox.

[0017] 2. This invention achieves convenient maintenance through a hydraulically driven cover opening component and high-efficiency purification through a dual filtration technology of centrifugation and magnetic adsorption. Its unique snap-fit ​​limiting component facilitates disassembly and assembly, while the scraper driven by the linkage mechanism, in conjunction with the horizontal guide component, can synchronously and automatically scrape and clean the magnetic rod without stopping the machine. This effectively solves the industry problem of traditional filters requiring machine shutdown for disassembly and cleaning and inconvenient maintenance, ensuring the continuous and efficient operation of the wind turbine gearbox lubrication system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a frontal cross-sectional view of the present invention. Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the bottom structure of the centrifuge bucket of the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point C; Figure 7 for Figure 5 Enlarged structural diagram at point D; Figure 8 for Figure 5 A magnified structural diagram at point E in the middle.

[0019] In the diagram: 1. Barrel body; 101. Oil outlet; 102. Support frame; 103. First hydraulic cylinder; 104. Second hydraulic cylinder; 105. Thrust bearing; 2. Cover plate; 201. Oil inlet; 202. Motor; 203. U-shaped frame; 204. Spiral scraper; 3. Centrifuge barrel wall; 301. First upper clamping block; 4. Centrifuge barrel bottom; 401. Lower limit plate; 402. First lower clamping groove; 403. Second lower clamping groove; 5. Central shaft; 501. Lifting ring; 5011. Lifting block; 5012. Upper limit block; 502. Elastic spring; 503. Rotating plate; 504. Semi-circular scraper; 505. Horizontal limit rod; 5051. Limiting ring; 506. Second upper clamping block; 6. Magnetic rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The following is a detailed description of an oil filtration device for lubricating oil in wind turbine gearboxes according to the present invention, with reference to the accompanying drawings: Example

[0023] An oil filtration device for lubricating oil in wind turbine gearboxes includes a barrel body 1, a cover plate 2, a central shaft 5, six magnetic rods 6, a cover opening assembly, and a centrifugal barrel. The centrifugal barrel is located inside the barrel body 1 and includes a centrifugal barrel wall 3, a centrifugal barrel bottom 4, and a limiting assembly. The centrifugal barrel bottom 4 is provided with a thrust bearing 105. The centrifugal barrel wall 3 and the central shaft 5 are connected to the centrifugal barrel bottom 4 through the limiting assembly. The barrel body 1 is provided with an oil outlet 101 and a second hydraulic cylinder 104. The oil outlet 101 is located on one side of the lower end of the barrel body 1. The second hydraulic cylinder 104 is fixedly installed on the outer bottom end of the barrel body 1, with its telescopic end extending into the barrel body 1 and connected to the centrifugal barrel bottom 4 through the thrust bearing 105. The cover plate 2 is provided with an oil inlet 201 and a motor 202. The motor 202 is fixedly installed at the middle of the top of the cover plate 2, and its output end is fixedly connected to the central shaft 5. The oil inlet 201 is located on the lower end of the barrel body 1. The cover plate 201 is located on the left side; the cover opening assembly is fixedly installed on the top of the cover plate 2, and both ends are connected to the barrel body 1; the bottom of the centrifuge barrel 4 is provided with a lower limit plate 401; the central shaft 5 is provided with a lifting ring 501, an elastic spring 502, a semi-circular scraper 504 and a linkage assembly; the lifting ring 501 is sleeved on the upper end of the central shaft 5; the upper end of the elastic spring 502 is fixedly connected to the upper end of the central shaft 5, and the lower end is fixedly connected to the lifting ring 501; the lower limit plate 401 is fixedly installed on the bottom end of the centrifuge barrel 4, and the upper end contacts the lifting ring 501; six magnetic rods 6 are symmetrically installed on both sides of the central shaft 5; twelve semi-circular scraper 504s are provided, and two are symmetrically sleeved on the six magnetic rods 6; the lifting ring 501 is connected to the semi-circular scraper 504 through the linkage assembly; valves are provided on both the oil inlet 201 and the oil outlet 101.

[0024] The working principle of this embodiment is as follows: In use, the external control system extends the second hydraulic cylinder 104, pushing the centrifuge barrel bottom 4 upwards, bringing the centrifuge barrel wall 3 close to the cover plate 2. Simultaneously, the valve of the oil inlet 201 is opened, allowing lubricating oil to enter the centrifuge barrel wall 3. Once the lubricating oil level in the barrel 1 reaches the working level, the motor 202 is started. The rotation of the motor 202 drives the central shaft 5 to rotate, which in turn drives the centrifuge barrel bottom 4 and the centrifuge barrel wall 3 to rotate. Under centrifugal force, impurities with a density greater than the oil and larger particles are thrown towards the inner wall of the centrifuge barrel wall 3. The lubricating oil, purified by centrifugation, overflows through the holes in the centrifuge barrel wall 3 and is stored at the bottom of the barrel 1. When the motor 202 drives the centrifuge barrel bottom 4 to rotate via the central shaft 5, the magnetic rod 6 on the central shaft 5 also rotates simultaneously, agitating the lubricating oil while adsorbing fine ferromagnetic metal shavings within it. Simultaneously, centrifugal filtration and magnetic adsorption filtration are achieved to ensure the filtration effect of lubricating oil. After the motor 202 is started for a period of time, the oil outlet 101 is opened through the valve to allow the filtered lubricating oil to flow out through the oil outlet 101, realizing the oil inlet-filtration-outlet circulation system. After the central shaft 5 drives the centrifugal barrel bottom 4 to rotate for a period of time, the second hydraulic cylinder 104 retracts, driving the centrifugal barrel bottom 4 to descend and separate from the central shaft 5. Without the driving force of the central shaft 5, the centrifugal barrel bottom 4 gradually stops rotating, causing the lower limit plate 401 to gradually move away from the lifting ring 501. The elastic spring 502 resets and pushes the lifting ring 501 downward, causing the linkage component at the bottom of the lifting ring 501 to push the circular scraper composed of two semi-circular scraper plates 504 to move outward on the surface of the magnetic rod 6, scraping all the magnetic rods 6 clean, realizing self-cleaning. The scraped-off rust impurities settle at the bottom of the centrifugal barrel 4. The external control system detects that the device has been running for a set time, namely two hours, and closes the valve of the oil inlet 201 to stop the oil intake and shuts off the motor 202. The filtered and purified lubricating oil in the barrel 1 is drained through the oil outlet 101. The cover plate 2 is opened through the cover opening device. During the process of the cover plate 2 rising, the lifting ring 501 gradually disengages from the lower limit plate 401. At this time, the elastic spring 502 returns to its original position and pushes the lifting ring 501. Through the lifting ring 501 and the linkage component, the circular scraper composed of two semi-circular scraper plates 504 moves on the surface of the magnetic rod 6, and at the same time scrapes all the magnetic rods 6 clean, realizing self-cleaning. The staff only needs to clean the centrifuge barrel wall 3 and the bottom of the centrifuge barrel 4. After cleaning, the cover plate 2 is closed and the device is restarted. Example

[0025] The difference from Embodiment 1 is that the opening assembly includes a support frame 102, a first hydraulic rod 103, and a U-shaped frame 203; the support frame 102 and the U-shaped frame 203 are inverted U-shapes; both ends of the support frame 102 are fixedly installed on the barrel body 1; both ends of the U-shaped frame 203 are fixedly installed on both sides of the motor 202 on the cover plate 2; the first hydraulic rod 103 is fixedly installed in the middle of the support frame 102, and its telescopic end is connected to the top of the U-shaped frame 203; the limiting assembly includes a first upper locking block 301, a second upper locking block 506, a first lower locking groove 402, and a... The first upper locking block 301 is provided in four parts and is symmetrically installed at the bottom of the centrifuge barrel wall 3; the first lower locking slot 402 is opened around the centrifuge barrel bottom 4 and matches the first upper locking block 301; the second upper locking block 506 is fixedly installed at the bottom of the central shaft 5; the second lower locking slot 403 is opened in the middle of the centrifuge barrel bottom 4 and matches the second upper locking block 506; the cover plate 2 is provided with two spiral scrapers 204; the spiral scrapers 204 are axially symmetrically installed at the bottom of the cover plate 2 and match the centrifuge barrel wall 3.

[0026] When the cover plate 2 needs to be opened for cleaning, the telescopic rod of the first hydraulic cylinder 103 retracts, causing the U-shaped frame 203 to rise, which in turn drives the cover plate 2 to rise. At the same time, the second upper locking block 506 of the central shaft 5 disengages from the second lower locking groove 403 of the centrifuge barrel bottom 4, opening the barrel body 1. The centrifuge barrel bottom 4 and the centrifuge barrel wall 3 are separated by the first upper locking block 301 and the first lower locking groove 402. When the central shaft 5 drives the centrifuge barrel bottom 4 to rotate, the spiral scraper 204 scrapes the deposits on the centrifuge barrel wall 3 to the bottom of the centrifuge barrel bottom 4 to clean the impurities and iron filings scraped off by the magnetic rod 6, preventing impurities from clogging the holes in the inner wall of the centrifuge barrel wall 3 and improving the filtration effect of the device for subsequent reuse.

[0027] The working principle of this embodiment is the same as that of Embodiment 1. Example

[0028] The difference from Embodiment 2 is that the linkage assembly includes lifting blocks 5011 and rotating plates 503; four lifting blocks 5011 are provided, symmetrically installed in pairs on the front and rear sides of the lifting ring 501; one end of the rotating plate 503 is rotatably connected to the lifting blocks 5011, and the other end is rotatably connected to the semi-circular scraping plate 504; the lifting ring 501 is provided with upper limit blocks 5012; two upper limit blocks 5012 are provided, fixedly installed on the front and rear sides of the lifting ring 501. The lower limit plate 401 is in contact with the upper limit block 5012. The semi-circular scraping plate 504 is provided with a horizontal limiting rod 505 and a limiting ring 5051. The limiting ring 5051 is fixed to the end of the magnetic rod 6 away from the central axis 5. The horizontal limiting rod 505 is provided with twenty-four rods, four rods in a group, surrounding the six magnetic rods 6. Every two rods pass through a semi-circular scraping plate, and one end is connected to the central axis 5, and the other end is connected to the limiting ring 5051.

[0029] When the bottom 4 of the centrifuge tank descends, the lower limit plate 401 disengages from the upper limit block 5012 of the lifting ring 501, causing the elastic spring 502 to reset and push the lifting ring 501 to move downward. The lifting block 5011 moves downward under the action of the lifting ring 501, and the angle between the lifting block 5011 and the rotating plate 503 increases, gradually approaching a vertical state. This causes the semi-circular scraping plate 504 to slide on the surface of the magnetic rod 6 through the horizontal limit rod 505, scraping off the iron filings. The limit ring 5051 is used to prevent the semi-circular scraping plate 504 from falling off the horizontal limit rod 505.

[0030] The working principle of this embodiment is the same as that of embodiment 2.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oil filtration device for lubricating oil in wind turbine gearboxes, characterized in that: The system includes a barrel body (1), a cover plate (2), a central shaft (5), several magnetic rods (6), a lid opening assembly, and a centrifuge barrel. The centrifuge barrel is located inside the barrel body (1) and includes a centrifuge barrel wall (3), a centrifuge barrel bottom (4), and a limiting assembly. The centrifuge barrel bottom (4) is provided with a thrust bearing (105). The centrifuge barrel wall (3) and the central shaft (5) are connected to the centrifuge barrel bottom (4) through the limiting assembly. The barrel body (1) is provided with an oil outlet (101) and a second hydraulic cylinder (104). The oil outlet (101) is located on one side of the lower end of the barrel (1); the second hydraulic cylinder (104) is fixedly installed on the outer bottom end of the barrel (1), with its telescopic end extending into the barrel (1) and connected to the bottom (4) of the centrifuge barrel via the thrust bearing (105); the cover plate (2) is provided with an oil inlet (201) and a motor (202); the motor (202) is fixedly installed at the middle of the top of the cover plate (2), and its output end is fixedly connected to the central shaft (5); the oil inlet... The opening (201) is located on the left side of the cover plate (201); the opening assembly is fixedly installed on the top of the cover plate (2) and connected to the barrel body (1) at both ends; the bottom (4) of the centrifuge barrel is provided with a lower limit plate (401); the central shaft (5) is provided with a lifting ring (501), an elastic spring (502), a semi-circular scraper (504) and a linkage assembly; the lifting ring (501) is sleeved on the upper end of the central shaft (5); the upper end of the elastic spring (502) is connected to the central shaft (5). The upper end of the spindle (5) is fixedly connected, and the lower end is fixedly connected to the lifting ring (501); the lower limit plate (401) is fixedly installed at the bottom end of the centrifuge barrel (4), and the upper end is in contact with the lifting ring (501); a number of magnetic rods (6) are symmetrically installed on both sides of the central shaft (5); a number of semi-circular scraping plates (504) are provided and symmetrically sleeved on the magnetic rods (6); the lifting ring (501) is connected to the semi-circular scraping plate (504) through a linkage assembly.

2. The oil filtration device for lubricating oil in wind turbine gearboxes according to claim 1, characterized in that: The opening assembly includes a support frame (102), a first hydraulic rod (103), and a U-shaped frame (203); the support frame (102) and the U-shaped frame (203) are inverted U-shapes; the two ends of the support frame (102) are fixedly installed on the barrel body (1); the two ends of the U-shaped frame (203) are fixedly installed on both sides of the motor (202) on the cover plate (2); the first hydraulic rod (103) is fixedly installed in the middle of the support frame (102), and its telescopic end is connected to the top of the U-shaped frame (203).

3. The oil filtration device for lubricating oil in wind turbine gearboxes according to claim 1, characterized in that: The limiting component includes a first upper locking block (301), a second upper locking block (506), a first lower locking groove (402), and a second lower locking groove (403); four first upper locking blocks (301) are provided and are symmetrically installed at the bottom of the centrifuge barrel wall (3); the first lower locking groove (402) is opened around the bottom of the centrifuge barrel (4) and matches the first upper locking block (301); the second upper locking block (506) is fixedly installed at the bottom of the central shaft (5); the second lower locking groove (403) is opened in the middle of the bottom of the centrifuge barrel (4) and matches the second upper locking block (506).

4. The oil filtration device for lubricating oil in wind turbine gearboxes according to claim 1, characterized in that: The cover plate (2) is provided with two spiral scrapers (204); the spiral scrapers (204) are axially symmetrically installed at the bottom end of the cover plate (2) and are matched with the centrifuge barrel wall (3).

5. The oil filtration device for lubricating oil in wind turbine gearboxes according to claim 1, characterized in that: The linkage component includes a lifting block (5011) and a rotating plate (503); there are four lifting blocks (5011), which are symmetrically installed in pairs on the front and rear sides of the lifting ring (501); one end of the rotating plate (503) is rotatably connected to the lifting block (5011), and the other end is rotatably connected to the semi-circular scraping plate (504).

6. An oil filtration device for lubricating oil in a wind turbine gearbox according to claim 1 or 5, characterized in that: The lifting ring (501) is provided with an upper limit block (5012); there are two upper limit blocks (5012), which are fixedly installed on the front and rear sides of the lifting ring (501); the top of the lower limit plate (401) is in contact with the upper limit block (5012).

7. The oil filtration device for lubricating oil in wind turbine gearboxes according to claim 5, characterized in that: The semi-circular scraping plate (504) is provided with a horizontal limiting rod (505) and a limiting ring (5051); the limiting ring (5051) is fixed at one end of the magnetic rod (6) away from the central axis (5); there are several horizontal limiting rods (505), which surround the magnetic rod (6), and one end of the rod passes through the semi-circular scraping plate (504) and is connected to the central axis (5), and the other end is connected to the limiting ring (5051).

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