A grease cleaning and injecting mechanism and robot for yaw gear train of wind turbine

Abstract

The utility model discloses a kind of grease cleaning and injecting mechanism and robot for yaw gear train of wind-driven generator, the grease cleaning and injecting mechanism includes base frame, locating plate, angle steel crossbeam and locating cylinder;Tooth end grease cleaning component, tooth gap grease cleaning component and grease injection component are also oppositely provided on locating plate along the rotation direction of yaw gear;Tooth end grease cleaning component, tooth gap grease cleaning component and grease injection component sequentially complete tooth end surface waste grease scraping, tooth gap waste grease cleaning and new grease injection operation in cooperation.The utility model completes the cooperative operation of waste grease scraping, tooth gap cleaning and new grease injection simultaneously in the one-way continuous rotation process of yaw gear, significantly reduces manual operation steps, greatly improves maintenance efficiency and automation level, and completely eliminates the safety risk of manual high-altitude operation;At the same time, laser calibration and screw precision adjustment are used to ensure the accurate positioning of clean single-wheel tooth and scraper, which can effectively remove tooth end surface and tooth gap waste grease.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine yaw gear maintenance technology, and in particular to a grease removal and injection mechanism and robot for wind turbine yaw gear systems. Background Technology

[0002] The yaw system of a wind turbine, as the core mechanism for wind energy capture, effectively drives the nacelle to rotate flexibly around the tower through the precise meshing of the drive gear system. This ensures that the rotor is always precisely aligned with the wind direction, directly affecting the wind energy capture efficiency of the unit. In this system, the drive gear system, as a key link in power transmission, must not only bear the enormous weight of the nacelle itself but also withstand the strong impact of wind loads and frictional losses during continuous meshing. Lubricating grease, with its excellent friction-reducing, heat-dissipating, sealing, and corrosion-preventing properties, becomes the cornerstone for ensuring the reliable operation of the drive gear system. However, in long-term operation, the lubricating grease gradually fails due to deterioration, contamination, and wear, which will accelerate tooth surface wear and cause failures such as scuffing and pitting, ultimately endangering the safety of the gear system. Currently, the cleaning of failed lubricating grease and the injection of new grease rely entirely on manual high-altitude operations, which not only face significant safety risks such as falls and mechanical injuries but also suffers from precision and efficiency bottlenecks such as incomplete cleaning, uneven grease injection, and low operational efficiency, making it difficult to meet the intelligent operation and maintenance needs of large-scale wind farms. Utility Model Content

[0003] This utility model provides a grease cleaning and injection mechanism and robot for the yaw gear system of a wind turbine, which solves the technical problem that the cleaning of failed grease and the injection of new grease into the yaw gear system of a wind turbine are entirely dependent on manual labor in the prior art, resulting in high operational safety risks, low efficiency and insufficient precision.

[0004] In view of the above technical problems, this utility model embodiment provides a grease injection mechanism for the yaw gear system of a wind turbine, including a base frame, a positioning plate slidably connected to the base frame, an angle steel beam, and a positioning cylinder installed on the base frame for driving the positioning plate to press the angle steel beam;

[0005] The positioning plate is also provided with a tooth end grease removal component, a tooth gap grease removal component, and a grease injection component, which are arranged opposite each other along the rotation direction of the yaw gear. The yaw gear is rotatably arranged in front of the positioning plate and its rotation axis is fixed relative to the angle steel beam. During the unidirectional continuous rotation of the yaw gear, the tooth end grease removal component, the tooth gap grease removal component, and the grease injection component work together in sequence to complete the scraping of waste grease on the tooth end face, the cleaning of waste grease in the tooth gap, and the injection of new lubricating grease.

[0006] Optionally, the two ends of the positioning plate are slidably connected to the inner wall of the base frame via sliding blocks;

[0007] The grease injection mechanism for the yaw gear system of a wind turbine also includes an adjusting screw for driving the positioning plate to slide. One end of the adjusting screw is fixedly connected to the end of the positioning plate, and the other end passes through the side wall of the adjusting screw.

[0008] Optionally, the tooth end grease removal assembly includes a lower column mounted on the positioning plate, an L-shaped upper column sleeved on the outer wall of the lower column, a positioning block fixedly connected to the end of the L-shaped upper column, a grease scraping drive cylinder mounted on the front end of the L-shaped upper column, a scraper rotatably mounted on the L-shaped upper column and connected to the cylinder rod of the grease scraping drive cylinder, and a scraper blade fixedly mounted on the scraper.

[0009] Optionally, the tooth end grease removal assembly further includes a knob screw connected to the lower column and used to adjust the sliding position of the L-shaped upper column on the lower column, and the mounting position of the positioning block at the end of the L-shaped upper column corresponds to the working limit position of the scraper.

[0010] The lower column and the L-shaped upper column are fitted with a clearance.

[0011] Optionally, the interdental grease removal assembly includes a cleaning column mounted on the positioning plate, a cleaning beam rotatably connected to the cleaning column via a bearing, a cleaning cylinder fixedly mounted on the cleaning beam, a cleaning single-wheel tooth connected to the cylinder rod of the cleaning cylinder, and a laser emitter fixedly mounted at the front end of the cleaning beam.

[0012] Optionally, the interdental grease removal assembly further includes a reset cylinder mounted on the upper end face of the cleaning column, the cylinder rod of the reset cylinder contacting the end of the cleaning beam.

[0013] Optionally, the grease injection assembly includes a grease injection pump mounted on the positioning plate, an oil injection conduit connected to the grease injection pump, and a positioning seat for positioning the oil injection conduit and mounted on the angle steel beam.

[0014] Optionally, the oil injection conduit extends out of the angle steel beam and is suspended above the tooth gap of the yaw gear, and the oil injection port of the oil injection conduit extends into the tooth gap of the yaw gear.

[0015] Optionally, it also includes a limit switch and a main controller installed at the front end of the base frame, wherein the positioning cylinder, the grease scraping drive cylinder, the cleaning cylinder, and the reset cylinder are all connected to the output terminal of the main controller.

[0016] This utility model also provides a robot, including the above-mentioned grease removal and injection mechanism for the yaw gear system of a wind turbine generator.

[0017] In this invention, the integrated structural design of the base frame, positioning plate, angle steel beam, and positioning cylinder enables the stable installation and precise positioning of the grease removal and injection mechanism next to the yaw gear system of the wind turbine. Simultaneously, the tooth end grease removal component, tooth gap grease removal component, and grease injection component, arranged sequentially along the rotation direction of the yaw gear, can automatically and efficiently complete the scraping of waste grease from the tooth end face, cleaning of waste grease from the tooth gap, and injection of new lubricating grease during the continuous unidirectional rotation of the gear. This significantly improves operational efficiency and precision, reduces the safety risks of manual high-altitude operations, effectively reduces friction and wear between gears, extends the service life of the yaw gear system, and ensures the reliable operation of the wind turbine yaw system and the wind energy capture efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the grease removal and injection mechanism for the yaw gear system of a wind turbine in one embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the grease removal and injection mechanism for the yaw gear system of a wind turbine in another embodiment of this utility model;

[0021] Figure 3 This is a side view of a grease removal and injection mechanism for a yaw gear system of a wind turbine in one embodiment of the present invention;

[0022] Figure 4 This is a top view of a grease removal and injection mechanism for a yaw gear system of a wind turbine in one embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the tooth tip grease removal component in one embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the interdental grease removal component in one embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the grease injection assembly in one embodiment of the present invention.

[0026] The reference numerals in the accompanying drawings are as follows:

[0027] 1-Basic frame, 11-Foldable support leg, 2-Positioning plate, 21-Sliding block, 3-Angle steel beam, 4-Positioning cylinder, 5-Gear end grease removal assembly, 51-Lower column, 52-L-shaped upper column, 53-Positioning block, 54-Grease scraping drive cylinder, 55-Scraper, 56-Scraper blade, 57-Knob screw, 6-Gear backlash grease removal assembly, 61-Cleaning column, 62-Cleaning beam, 63-Cleaning cylinder, 64-Cleaning single gear tooth, 65-Laser emitter, 66-Reset cylinder, 7-Grease injection assembly, 71-Grease injection pump, 72-Oil injection conduit, 73-Positioning seat, 74-Oil injection port, 8-Yaw gear, 9-Adjusting screw, 10-Limit switch. Detailed Implementation

[0028] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0031] like Figures 1 to 7 As shown, an embodiment of the present invention provides a grease injection mechanism for a yaw gear system of a wind turbine, including a base frame 1, a positioning plate 2 slidably connected to the base frame 1, an angle steel beam 3, and a positioning cylinder 4 installed on the base frame 1 for driving the positioning plate 2 to press the angle steel beam 3.

[0032] The positioning plate 2 is also provided with a tooth end grease removal component 5, a tooth gap grease removal component 6 and a grease injection component 7 arranged opposite to each other along the rotation direction of the yaw gear 8. The yaw gear 8 is rotatably arranged in front of the positioning plate 2 and its rotation axis is fixed relative to the angle steel beam 3. During the unidirectional continuous rotation of the yaw gear 8, the tooth end grease removal component 5, the tooth gap grease removal component 6 and the grease injection component 7 work together to complete the scraping of waste grease on the tooth end face, cleaning of waste grease in the tooth gap and injection of new lubricating grease in sequence.

[0033] Understandably, the overall positioning and stable installation of the entire mechanism are achieved through the structural design of the base frame 1 and the sliding positioning plate 2. The positioning cylinder 4 presses the positioning plate 2 against the angle steel beam 3 to ensure operational stability. By integrating three functional components—tooth end grease removal, tooth gap grease removal, and grease injection—in sequence along the rotation direction of the yaw gear 8 on the positioning plate 2, the coordinated operation of scraping off waste grease, cleaning the tooth gap, and injecting new grease is achieved simultaneously during the continuous unidirectional rotation of the gear. This reduces the tedious steps of manual operation, improves operational efficiency, and enables rapid and continuous maintenance of the yaw gear system. By effectively cleaning the waste grease from the tooth end face and tooth gap of the yaw gear 8 and injecting new grease, friction and wear between gears can be reduced, the risk of failure due to poor lubrication can be lowered, and the service life of the yaw gear system can be extended.

[0034] In one embodiment, such as Figures 1 to 4 As shown, the two ends of the positioning plate 2 are slidably connected to the inner wall of the foundation frame 1 via sliding blocks 21; the grease injection mechanism for the yaw gear system of the wind turbine also includes an adjusting screw 9 for driving the positioning plate 2 to slide, one end of the adjusting screw 9 being fixedly connected to the end of the positioning plate 2, and the other end passing through the side wall of the adjusting screw 9. Understandably, a foldable support leg 11 is also installed on the bottom wall of the foundation frame 1.

[0035] In one embodiment, such as Figure 5 As shown, the tooth-end grease removal assembly 5 includes a lower column 51 mounted on the positioning plate 2, an L-shaped upper column 52 sleeved on the outer wall of the lower column 51, a positioning block 53 fixedly connected to the end of the L-shaped upper column 52, a grease-scraping drive cylinder 54 mounted on the front end of the L-shaped upper column 52, a scraper 55 rotatably mounted on the L-shaped upper column 52 and connected to the cylinder rod of the grease-scraping drive cylinder 54, and a scraper blade 56 fixedly mounted on the scraper 55. Understandably, the scraper 55 can be connected to the L-shaped upper column 52 via a cylindrical pin, and connected to the end of the scraper 55 via a pin shaft.

[0036] In one embodiment, such as Figure 5As shown, the tooth-end grease removal assembly 5 further includes a knob screw 57 connected to the lower column 51 and used to adjust the sliding position of the L-shaped upper column 52 on the lower column 51. The mounting position of the positioning block 53 at the end of the L-shaped upper column 52 corresponds to the working limit position of the scraper 55. The lower column 51 and the L-shaped upper column 52 are clearance-fitted. Understandably, the knob screw 57 engages with the internal thread of the lower column 51, realizing the up-and-down movement of the upper column 52.

[0037] In one embodiment, such as Figure 6 As shown, the interdental grease removal assembly 6 includes a cleaning column 61 mounted on the positioning plate 2, a cleaning beam 62 rotatably connected to the cleaning column 61 via bearings, a cleaning cylinder 63 fixedly mounted on the cleaning beam 62, a cleaning single-wheel tooth 64 connected to the cylinder rod of the cleaning cylinder 63, and a laser emitter 65 fixedly mounted at the front end of the cleaning beam 62. Understandably, the vertical direction of the laser emitter 65 is at the front end of the cleaning single-wheel tooth 64.

[0038] In one embodiment, such as Figure 6 As shown, the tooth gap cleaning assembly 6 also includes a reset cylinder 66 installed on the upper end face of the cleaning column 61, and the cylinder rod of the reset cylinder 66 contacts the end of the cleaning beam 62.

[0039] In one embodiment, such as Figure 7 As shown, the grease injection assembly 7 includes a grease injection pump 71 mounted on the positioning plate 2, an oil injection conduit 72 connected to the grease injection pump 71, and a positioning seat 73 for positioning the oil injection conduit 72 and mounted on the angle steel beam 3.

[0040] In one embodiment, such as Figure 7 As shown, the oil injection conduit 72 extends out of the angle steel beam 3 and is suspended above the tooth gap of the yaw gear 8, and the oil injection port 74 of the oil injection conduit 72 extends into the tooth gap of the yaw gear 8.

[0041] In one embodiment, such as Figures 1 to 4 As shown, the grease removal and injection mechanism for the yaw gear system of the wind turbine also includes a limit switch 10 and a main controller installed at the front end of the base frame 1. The positioning cylinder 4, the grease scraping drive cylinder 54, the cleaning cylinder 63, and the reset cylinder 66 are all connected to the output end of the main controller.

[0042] This utility model also provides a robot, including the aforementioned grease removal and injection mechanism for a wind turbine yaw gear system. In the grease removal and injection mechanism for a wind turbine yaw gear system described in the above embodiments of this utility model, the mechanism includes a base frame 1, a positioning plate 2 slidably connected to the base frame 1, an angle steel beam 3, and a positioning cylinder 4 mounted on the base frame 1 for driving the positioning plate 2 to press against the angle steel beam 3. The positioning plate 2 is also provided with a tooth end grease removal component 5, a tooth gap grease removal component 6, and a grease injection component 7 arranged opposite each other along the rotation direction of the yaw gear 8. The yaw gear 8 is rotatably positioned in front of the positioning plate 2, and its rotation axis is fixed relative to the angle steel beam 3. During the unidirectional continuous rotation of the yaw gear 8, the tooth end grease removal component 5, the tooth gap grease removal component 6, and the grease injection component 7 sequentially and collaboratively complete the scraping of waste grease from the tooth end face, the cleaning of waste grease from the tooth gap, and the injection of new lubricating grease.

[0043] In the robot of the above embodiments of this utility model, the working process of the robot is as follows:

[0044] During installation, firstly, based on the relative position of the robot's base frame 1 and the yaw gear 8, the initial relative position of the tooth gap cleaning component 6 and the tooth gap of the yaw gear 8 is calibrated using the crosshair reference line emitted by the laser emitter 65. Then, the foldable support legs 11 of the base frame 1 are unfolded and the positioning cylinder 4 is activated. The cylinder rod of the positioning cylinder 4 extends to press against the positioning plate 2 and the angle steel beam 3 at the top of the wind turbine tower, achieving rigid fixation of the entire base frame 1. Through the cooperation of the laser emitter 65 and the adjusting screw 9, the distance between the tooth gap cleaning component 6 and the yaw gear 8, as well as the radial position of the robot's working part and the gear, are finely adjusted until the cleaning single-tooth 64 is accurately suspended directly above the tooth gap of the yaw gear 8. Simultaneously, the scraper 55 is unfolded and the positioning block 53 is installed. The relative height of the upper column and the lower column 51 is adjusted by rotating the knob screw 57, ensuring that the scraper 56 is completely in contact with the end face of the yaw gear 8.

[0045] During operation, the main controller activates the scraping drive cylinder 54 and controls its output speed, driving the scraper 55 to perform a reciprocating scraping motion on the upper surface of the yaw gear 8. Waste grease is collected inside the scraper 55, and then, through the inertia generated by the scraping and the collision between the scraper 55 and the positioning block 53, the waste grease separates from the gear and falls into the collector below. The limit switch 10 is adjusted so that its probe contacts the yaw gear 8. During gear rotation, a signal is triggered by the limit switch 10 every time the gear passes a tooth. After receiving the signal, the main controller uses the laser emitter 65 to determine the relative position with the tooth gap in real time, dynamically adjusting the time difference between the limit switch 10 signal and the activation action of the cleaning cylinder 63 to ensure synchronization. The cleaning single gear 64 then moves up and down within the tooth gap of the yaw gear 8, performing a single cleaning motion and rotating with the gear. After completing a single cleaning and resetting cycle, the resetting cylinder 66 drives the cleaning beam 62 to rotate. Precise positioning is achieved through the positioning block 53 on the cleaning beam 62, aligning the cleaning single gear 64 with the next tooth gap, and the cleaning operation is performed cyclically. During this process, the grease injection pump 71 is activated, and new grease is sprayed through the injection conduit 72 onto the tooth gap and tooth surface of the yaw gear 8, and evenly spread to the entire meshing surface through the meshing action with the drive gear, completing the new grease injection.

[0046] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A grease removal and injection mechanism for the yaw gear system of a wind turbine generator, characterized in that, Includes a base frame (1), a positioning plate (2) slidably connected to the base frame (1), an angle steel beam (3), and a positioning cylinder (4) installed on the base frame (1) for driving the positioning plate (2) to press the angle steel beam (3). The positioning plate (2) is also provided with a tooth end grease removal component (5), a tooth gap grease removal component (6) and a grease injection component (7) relative to each other along the rotation direction of the yaw gear (8). The yaw gear (8) is rotatably arranged in front of the positioning plate (2) and its rotation axis is fixed relative to the angle steel beam (3). During the unidirectional continuous rotation of the yaw gear (8), the tooth end grease removal component (5), the tooth gap grease removal component (6) and the grease injection component (7) work together to complete the scraping of waste grease on the tooth end face, cleaning of waste grease in the tooth gap and injection of new lubricating grease in sequence.

2. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 1, characterized in that, The two ends of the positioning plate (2) are slidably connected to the inner wall of the base frame (1) through sliding blocks (21); It also includes an adjusting screw (9) for driving the positioning plate (2) to slide. One end of the adjusting screw (9) is fixedly connected to the end of the positioning plate (2), and the other end passes through the side wall of the adjusting screw (9).

3. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 1, characterized in that, The tooth end cleaning assembly (5) includes a lower column (51) mounted on the positioning plate (2), an L-shaped upper column (52) sleeved on the outer wall of the lower column (51), a positioning block (53) fixedly connected to the end of the L-shaped upper column (52), a scraping drive cylinder (54) mounted on the front end of the L-shaped upper column (52), a scraper (55) rotatably mounted on the L-shaped upper column (52) and connected to the cylinder rod of the scraping drive cylinder (54), and a scraper blade (56) fixedly mounted on the scraper (55).

4. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 3, characterized in that, The tooth end cleaning assembly (5) also includes a knob screw (57) connected to the lower column (51) and used to adjust the sliding position of the L-shaped upper column (52) on the lower column (51). The mounting position of the positioning block (53) at the end of the L-shaped upper column (52) corresponds to the working limit position of the scraper (55). The lower column (51) and the L-shaped upper column (52) are fitted with a clearance.

5. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 4, characterized in that, The tooth gap cleaning assembly (6) includes a cleaning column (61) mounted on the positioning plate (2), a cleaning beam (62) rotatably connected to the cleaning column (61) via a bearing, a cleaning cylinder (63) fixedly mounted on the cleaning beam (62), a cleaning single wheel tooth (64) connected to the cylinder rod of the cleaning cylinder (63), and a laser emitter (65) fixedly mounted at the front end of the cleaning beam (62).

6. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 5, characterized in that, The tooth gap cleaning assembly (6) also includes a reset cylinder (66) installed on the upper end face of the cleaning column (61), and the cylinder rod of the reset cylinder (66) contacts the end of the cleaning beam (62).

7. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 6, characterized in that, The grease injection assembly (7) includes a grease injection pump (71) mounted on the positioning plate (2), an oil injection conduit (72) connected to the grease injection pump (71), and a positioning seat (73) for positioning the oil injection conduit (72) and mounted on the angle steel beam (3).

8. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 7, characterized in that, The oil injection conduit (72) extends out of the angle steel beam (3) and is suspended above the tooth gap of the yaw gear (8), and the oil injection port (74) of the oil injection conduit (72) extends into the tooth gap of the yaw gear (8).

9. The grease removal and injection mechanism for the yaw gear system of a wind turbine generator according to claim 8, characterized in that, It also includes a limit switch (10) and a main controller installed at the front end of the base frame (1). The positioning cylinder (4), the grease scraping drive cylinder (54), the cleaning cylinder (63), and the reset cylinder (66) are all connected to the output end of the main controller.

10. A robot, characterized in that, Includes a grease removal and grease injection mechanism for a wind turbine yaw gear system as described in any one of claims 1-9.

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