A wind turbine pitch bearing lubrication device

Abstract

This invention discloses a wind turbine pitch bearing lubrication device, relating to the field of wind turbine technology. It includes a connecting plate and a pitch bearing. Bases are welded to both sides of the connecting plate, and a fixing head is provided on the top of each base. The fixing head is fitted onto the outside of the pitch bearing. This wind turbine pitch bearing lubrication device, through the combined use of a recovery seat, baffle, inclined baffle, and recovery trough, ensures that during the lubrication process of the working parts of the pitch bearing, excess lubricating oil accumulates on the outside of the pitch bearing and drips down its outer edge. Splashed lubricating oil is blocked by the inclined baffle and slides down into the recovery trough. Ultimately, all excess lubricating oil accumulates in the recovery trough for recycling, effectively preventing dripping and splashing lubricating oil from affecting the environment inside the hub and reducing lubricating oil waste.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and more specifically, to a lubrication device for wind turbine pitch bearings. Background Technology

[0002] Wind power generation consists of wind turbine generator sets, including wind rotors and generators. The wind rotor contains blades, hubs, and reinforcement components. The pitch system, as one of the core components of the control system of large wind turbine generator sets, plays a vital role in the safe, stable, and efficient operation of the generator set. The pitch mechanism controls the position and angle of the blades relative to the plane of rotation. Pitch control enables the wind turbine to obtain electrical energy at low wind speeds and to capture a fixed amount of wind energy when the wind speed is higher than the rated wind speed.

[0003] The pitch control mechanism is located at the front of the hub, at the root of the hub and blades, where gears connect the two. The outer motor controls the pitch via gears or a toothed belt. The outer motor and other parts of the pitch control system are all inside the hub and are driven by it. With the rapid development of wind power generation technology, wind turbines are evolving from constant speed and frequency to variable speed and frequency, and from fixed pitch to variable pitch.

[0004] During operation, the pitch mechanism inevitably experiences wear at the connection points between the bearings and other components. To control this wear as much as possible, ensuring proper lubrication of the bearing exterior is crucial. A common lubrication method is to spray lubricating oil onto the bearing, allowing the oil to be dispersed through the bearing's movement for comprehensive lubrication. However, during operation, most of the lubricating oil cannot directly reach the bearing's working parts, and the sprayed oil inevitably splashes, leading to accumulation on the bearing exterior. Once a certain amount accumulates, it slides into the hub, rendering some of the lubricating oil ineffective and wasting resources. Furthermore, residual lubricating oil easily attracts dust, affecting the cleanliness of the hub's interior. To address these issues, we designed a wind turbine pitch bearing lubrication device. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a wind turbine pitch bearing lubrication device to improve the above problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine pitch bearing lubrication device, comprising a connecting plate and a pitch bearing, wherein bases are welded to both sides of the connecting plate, and a fixing head is provided on the top of the base. The fixing head is sleeved on the outside of the pitch bearing. An oil injection pump located below the pitch bearing is fixedly installed in the middle of the connecting plate. The oil injection pump is provided with uniformly distributed oil injection copper pipes, and an oil inlet is provided at the left end of the recovery seat. A spray base is fixedly fitted at the end of the oil injection copper pipes. A recovery seat is fixedly fitted on the outside of the spray base, and uniformly distributed atomizing nozzles are fixedly fitted on the outside of the spray base.

[0007] Furthermore, the recycling seat has a recycling groove inside, and a recycling pipe is fixedly connected to the outside of the recycling groove. A connecting end is fixedly fitted to the end of the recycling pipe.

[0008] Furthermore, both the recovery seat and the jet base are arc-shaped to match the exterior of the pitch bearing, and the recovery seat is externally fitted with a baffle that matches the pitch bearing.

[0009] Furthermore, a gap is provided between the inner side of the baffle and the outer side of the pitch bearing, and an inclined baffle is provided on the inner side of the baffle.

[0010] Furthermore, a knob is fixedly fitted on the outside of the connecting end, and a filter tube is fitted inside the connecting end, with evenly distributed filter holes on the outside of the filter tube.

[0011] Furthermore, a receiving cavity is provided on the inner side of the filter tube, and a lever is fixedly installed on the outside of the filter tube, the lever being L-shaped.

[0012] Furthermore, the oil inlet and the connecting end are matched with each other, and a positioning post is fixedly installed inside the oil inlet, and the positioning post is matched with the filter tube.

[0013] Furthermore, the connecting plate, base, support frame, and fixing head are all made of metal, and the inner ring of the pitch bearing is provided with evenly distributed teeth, and the inner and outer rings of the pitch bearing can move together.

[0014] The wind turbine pitch bearing lubrication device provided by this invention has the following beneficial effects:

[0015] 1. This wind turbine pitch bearing lubrication equipment, through the combined use of a recovery seat, baffle, inclined baffle, and recovery trough, ensures that during the lubrication process of the working parts of the pitch bearing, excess lubricating oil accumulates on the outside of the pitch bearing and drips down along its exterior. Splashed lubricating oil is blocked by the inclined baffle and slides down along it into the recovery trough. Ultimately, all excess lubricating oil accumulates in the recovery trough, awaiting recycling. This effectively prevents dripping and splashing lubricating oil from affecting the internal environment of the hub and reduces lubricating oil waste.

[0016] 2. This wind turbine pitch bearing lubrication equipment, through the combined use of a recovery tank, a recovery pipe, a connecting end, and an oil inlet, allows the recovery tank to be externally connected to a recovery pipe. The end of the recovery pipe is equipped with a connecting end that can connect to the oil inlet. After the connecting end is connected to the oil inlet, the lubricating oil remaining in the recovery tank can enter the oil injection pump through the recovery pipe, the connecting end, and the oil inlet for reuse, thereby improving the utilization efficiency of the lubricating oil in the wind turbine pitch bearing lubrication equipment.

[0017] 3. This wind turbine pitch bearing lubrication device, through the combined use of filter tubes, levers, a receiving cavity, and positioning pins, allows the filter tubes to be sleeved in the connecting end of the device. The filter tubes have evenly distributed filter holes on their exterior. During the lubricating oil recycling process, the oil passes through the filter tubes, filtering out impurities from the pitch bearings and storing them within the tubes. The positioning pins in the oil inlet assist in positioning the filter tubes. When the connecting end and the oil inlet are stably connected, the filter tubes are clamped between the positioning pins and the connecting end, ensuring stability during operation and effectively reducing impurities in the recycled lubricating oil, thus guaranteeing lubrication performance. Attached Figure Description

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

[0019] Figure 1 A schematic diagram of a wind turbine pitch bearing lubrication device proposed in this invention is shown.

[0020] Figure 2 A front view of the wind turbine pitch bearing lubrication device proposed in this invention is shown.

[0021] Figure 3 A schematic diagram of the external structure of the recycling station proposed in this invention is shown;

[0022] Figure 4 A schematic diagram of the structure of the recycling seat and baffle proposed in this invention is shown;

[0023] Figure 5 This diagram shows the assembly of the connecting end and the filter tube proposed in this invention.

[0024] Figure 6 A schematic diagram of the connection end and the outside of the filter tube proposed in this invention is shown;

[0025] Figure 7 A schematic diagram of the internal structure of the filter tube proposed in this invention is shown;

[0026] Figure 8 A schematic diagram of the oil inlet and positioning column proposed in this invention is shown.

[0027] In the diagram: 1. Connecting plate; 2. Injection pump; 3. Inlet port; 4. Knob; 5. Recovery pipe; 6. Base; 7. Support frame; 8. Fixing head; 9. Baffle; 10. Injection base; 11. Pitch bearing; 12. Recovery seat; 13. Injection copper pipe; 14. Atomizing nozzle; 15. Recovery tank; 16. Angled baffle; 17. Connecting end; 18. Filter pipe; 19. Paddle; 20. Storage chamber; 21. Positioning post. Detailed Implementation

[0028] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] Please see Figures 1 to 3 This invention provides a technical solution: a wind turbine pitch bearing lubrication device, including a connecting plate 1 and a pitch bearing 11. Bases 6 are welded to both sides of the connecting plate 1, and a fixing head 8 is provided on the top of the base 6. The fixing head 8 is sleeved on the outside of the pitch bearing 11. The connecting plate 1, base 6, support frame 7, and fixing head 8 are all made of metal to ensure structural strength and overall stability during operation. The inner ring of the pitch bearing 11 has evenly distributed teeth, and the inner and outer rings of the pitch bearing 11 are movable. The teeth on the inner ring of the pitch bearing 11 can connect with the drive mechanism to ensure its movement. The principle and usage of this pitch bearing 11 are the same as existing technologies and will not be described further here.

[0030] A fuel injection pump 2 is fixedly installed in the middle of the connecting plate 1, located below the pitch bearing 11. The fuel injection pump 2 is provided with uniformly distributed fuel injection copper pipes 13. An oil inlet 3 is provided at the left end of the recovery seat 12. A spray base 10 is fixedly fitted at the end of the fuel injection copper pipes 13. The recovery seat 12 is fixedly fitted at the outside of the spray base 10. Atomizing nozzles 14 are uniformly distributed on the outside of the spray base 10. When the fuel injection pump 2 is started, the lubricating oil inside it is injected into the spray base 10 through the fuel injection copper pipes 13. After the lubricating oil is atomized by the atomizing nozzles 14 on the outside of the spray base 10, it is evenly sprayed on the outside of the pitch bearing 11. A recovery trough 15 is opened inside the recovery seat 12. A recovery pipe 5 is fixedly connected to the outside of the recovery trough 15. The recovery trough 15 inside the recovery seat 12 is used to store the recovered lubricating oil. A connecting end 17 is fixedly fitted at the end of the recovery pipe 5. After the lubricating oil enters the recovery trough 15, it can be output to the outside through the recovery pipe 5 and the connecting end 17, thereby realizing recycling.

[0031] Please see Figures 2 to 6 Both the recovery seat 12 and the spray base 10 are arc-shaped, matching the exterior of the pitch bearing 11. The recovery seat 12 is fixedly fitted with a baffle 9 that matches the pitch bearing 11. The arc shape of the recovery seat 12 and the spray base 10 can better adapt to the structure of the pitch bearing 11. The baffle 9 is used to block the gap between the recovery seat 12 and the pitch bearing 11 to a certain extent, reducing the amount of lubricating oil splashed onto the exterior of the recovery seat 12. There is a gap between the inner side of the baffle 9 and the exterior of the pitch bearing 11. The gap between the inner side of the baffle 9 and the exterior of the pitch bearing 11 can prevent the baffle 9 from directly contacting the exterior of the pitch bearing 11, preventing any impact on the operation of the pitch bearing 11. Furthermore, the inner side of the baffle 9 is provided with a beveled edge 16. The beveled edge 16 on the inner side of the baffle 9 allows the splashed lubricating oil to slide down towards the recovery seat 12 along the guide of the beveled edge 16.

[0032] The external fixed sleeve of the connecting end 17 is equipped with a knob 4. The knob 4 can be rotated to facilitate the connection of the connecting end 17 with the oil inlet 3. During the process of reusing the lubricating oil, it needs to pass through the connecting end 17. During this process, impurities in the lubricating oil will be filtered by the filter tube 18. The connecting end 17 is fitted with a filter tube 18. The filter tube 18 has evenly distributed filter holes on its outside. The lubricating oil can pass through the filter holes and enter the oil inlet 3, and finally be input into the oil injection pump 2 for lubrication again.

[0033] Please see Figures 5 to 8The filter tube 18 has a storage cavity 20 on its inner side. The storage cavity 20 on the inner side of the filter tube 18 is used to store impurities. After the equipment has been working for a certain period of time, the impurities accumulated in the filter tube 18 need to be cleaned. A lever 19 is fixedly installed on the outside of the filter tube 18. The lever 19 is L-shaped. At this time, the connection between the connecting end 17 and the oil inlet 3 can be disconnected. Then, the lever 19 on the outside of the filter tube 18 can be moved to remove the filter tube 18 from the connecting end 17. Finally, the impurities can be poured out directly.

[0034] The oil inlet 3 and the connecting end 17 are matched with each other and can be connected by threads. The oil inlet 3 is designed to facilitate the injection of lubricating oil into the fuel injection pump 2. After being connected to the connecting end 17, it can ensure the recycling of lubricating oil. The oil inlet 3 is internally fitted with a positioning post 21, which is matched with the filter tube 18. The positioning post 21 is used to assist in the positioning of the filter tube 18. When the connecting end 17 and the oil inlet 3 are stably connected, the filter tube 18 is clamped between the positioning post 21 and the connecting end 17, thereby ensuring its stability during operation.

[0035] In summary, the wind turbine pitch bearing lubrication device provided by this invention, during use, injects lubricating oil into the oil injection pump 2 through the oil inlet 3, removes the connecting end 17 and filter tube 18, fits the filter tube 18 into the connecting end 17, inserts the connecting end 17 into the oil inlet 3, and rotates the knob 4 on the outside of the connecting end 17 to make the connecting end 17 and the oil inlet 3 threadedly connected. After the connection is stable, the filter tube 18 is clamped between the positioning post 21 and the connecting end 17 and kept fixed. During lubrication, the pitch bearing 11 moves, the oil injection pump 2 starts and injects the lubricating oil inside it into the spray base 10 through the oil injection copper pipe 13. The lubricating oil is atomized by the atomizing nozzle 14 on the outside of the spray base 10 and sprayed evenly on the outside of the pitch bearing 11. Excess lubricating oil accumulates on the outside of the pitch bearing 11 and flows along the outside of the pitch bearing 11. The lubricating oil drips and splashes out, but is blocked by the inclined baffle 16 and slides down the inclined baffle 16 into the recovery tank 15. Both accumulate in the recovery tank 15, waiting to be recycled. The lubricating oil remaining in the recovery tank 15 can enter the oil injection pump 2 through the recovery pipe 5, the connecting end 17, and the oil inlet 3 for reuse. During the process of passing through the connecting end 17, impurities in the lubricating oil are filtered by the filter pipe 18. When the equipment has been working for a certain period of time and it is necessary to add lubricating oil to the oil injection pump 2, disconnect the connection between the connecting end 17 and the oil inlet 3, add lubricating oil to the oil injection pump 2 through the oil inlet 3, and at the same time, move the lever 19 on the outside of the filter pipe 18 to remove the filter pipe 18 from the connecting end 17, clean it, reassemble it, and then reconnect the connecting end 17 to the oil inlet 3 to complete the working process of the wind turbine pitch bearing lubrication equipment.

[0036] 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. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wind turbine pitch bearing lubrication device, comprising a connecting plate (1) and a pitch bearing (11), characterized in that: The connecting plate (1) has bases (6) welded on both sides. The base (6) has a fixing head (8) on top. The fixing head (8) is sleeved on the outside of the pitch bearing (11). The connecting plate (1) has an injection pump (2) fixedly installed in the middle, located below the pitch bearing (11). The injection pump (2) has evenly distributed injection copper pipes (13) on its outside. The recovery seat (12) has an oil inlet (3) on its left end. The injection copper pipe (13) has an injection base (10) fixedly fitted at its end. The injection base (10) has a recovery seat (12) fixedly fitted on its outside. The injection base (10) has evenly distributed atomizing nozzles (14) fixedly fitted on its outside. The recycling seat (12) has a recycling groove (15) inside, and a recycling pipe (5) is fixedly connected to the outside of the recycling groove (15). A connecting end (17) is fixedly fitted to the end of the recycling pipe (5). Both the recovery seat (12) and the jet base (10) are arc-shaped and match the outside of the pitch bearing (11). The outside of the recovery seat (12) is fixedly fitted with a baffle (9) that matches the pitch bearing (11). A gap is provided between the inner side of the baffle (9) and the outer side of the pitch bearing (11), and an inclined baffle (16) is provided on the inner side of the baffle (9). The external end of the connecting end (17) is fitted with a knob (4), and the internal end of the connecting end (17) is fitted with a filter tube (18), and the external end of the filter tube (18) is provided with uniformly distributed filter holes.

2. The wind turbine pitch bearing lubrication device according to claim 1, characterized in that: The filter tube (18) has a storage cavity (20) on its inner side, and a lever (19) is fixedly installed on the outside of the filter tube (18). The lever (19) is L-shaped.

3. The wind turbine pitch bearing lubrication device according to claim 1, characterized in that: The oil inlet (3) and the connecting end (17) are matched with each other. The oil inlet (3) is fitted with a positioning post (21), and the positioning post (21) is matched with the filter tube (18).

4. The wind turbine pitch bearing lubrication device according to claim 1, characterized in that: The connecting plate (1), base (6), support frame (7), and fixing head (8) are all made of metal. The inner ring of the pitch bearing (11) is provided with evenly distributed teeth, and the inner ring and outer ring of the pitch bearing (11) can move together.

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