One-way backflow prevention oil injection device for wind power bearing

Abstract

The application provides a one-way backflow-preventing oil injection device for a wind power bearing, and relates to the technical field of bearing oil injection equipment. The device comprises a base. A collection groove is formed in the upper end face of the base, and support rods are welded in an annular array on the inner wall of the collection groove. Bearings are placed on the support rods, and a discharge pipe is welded on the base. An oil injection part, a limiting part and a backflow-preventing part are arranged on the base. The V-shaped groove clamping block cooperates with the reverse threaded adjusting rod to quickly and adaptively clamp wind power bearings of different specifications. The oil injection part is equipped with a scale to accurately adjust the oil injection position. The elastic sealing backflow-preventing structure is arranged in the oil injection pipe. The structure automatically opens during oil injection and automatically seals during stopping of injection, thereby completely preventing backflow of oil. The application solves the problems of inconvenient positioning and clamping, low oil injection position adjustment accuracy, easy backflow of oil and inability to recycle excess grease of the existing wind power bearing oil injection device. The overall structure is compact, the operation is convenient, the adaptability is strong, and the device is suitable for oil injection and maintenance of wind power bearings of various specifications.

Description

Technical Field

[0001] This invention relates to the field of bearing oil injection equipment technology, and in particular to a one-way anti-backflow oil injection device for wind turbine bearings. Background Technology

[0002] Wind turbine bearings are special heavy-duty bearings specifically designed for use in wind turbine generator sets. They are the core "joints" of the wind turbine, responsible for supporting rotation, transmitting power, and withstanding extreme and complex loads.

[0003] Wind turbine bearings operate under high-altitude, heavy-load, and variable-speed conditions for extended periods, requiring regular and precise lubrication to ensure effective lubrication. Existing wind turbine bearing lubrication systems have the following shortcomings: First, the bearing positioning and clamping structure has poor adaptability and cannot quickly and stably clamp wind turbine bearings of different outer diameters, and is prone to displacement during the oil injection process. Secondly, the oil filling position is mostly adjusted manually with no precise positioning reference, resulting in low efficiency and large errors in aligning the oil filling port. Third, the oil injection pipe lacks a reliable one-way backflow prevention structure, and the high-pressure oil in the bearing is prone to backflow after the injection is stopped, resulting in insufficient lubrication and grease waste; Fourth, there is no collection structure for excess grease during the oiling process, which causes it to scatter and pollute the equipment environment and cannot be recycled and reused.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a one-way anti-backflow oil injection device for wind turbine bearings, in order to achieve a more practical purpose. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a one-way anti-backflow oil injection device for wind turbine bearings, which solves the problems of poor clamping adaptability, low oil injection position adjustment accuracy, easy backflow of oil, and inability to recover excess grease in existing devices.

[0006] This invention provides a one-way anti-backflow oil injection device for wind turbine bearings, specifically including: a base; a collection groove is provided on the upper end face of the base, and support rods are welded in a ring array on the inner wall of the collection groove. The upper part of the outer wall of the support rods is flush with the upper end face of the base. A bearing is placed on the support rods, and a discharge pipe is welded on the base. During the injection process, excess oil will enter the collection groove for collection and be discharged through the discharge pipe.

[0007] Furthermore, guide rods are symmetrically welded on the base, a base plate slides on the guide rods, a frame is fixed on the base, the frame has a concave structure, an electric hydraulic cylinder is fixed on the frame, the extended end of the electric hydraulic cylinder is fixed on the base plate, and the bottom end face of the base plate contacts the upper end face of the bearing.

[0008] Furthermore, a sliding block is slidable on the substrate, and an oil injection pipe is welded onto the sliding block. The bottom end face of the sliding block is flush with the bottom end face of the substrate.

[0009] Furthermore, a base is welded onto the substrate. The base has a concave structure and a threaded rod is threadedly connected to it. One end of the threaded rod rotates on a sliding block.

[0010] Furthermore, a scale is fixed on the sliding block, and the scale passes through the base. The guide rod, base plate, frame, electric hydraulic cylinder, sliding block, oil injection pipe, base, threaded rod, and scale together form the oil injection part.

[0011] Furthermore, the frame has two symmetrically sliding mounting arms, each with a clamping block welded to its inner side, and the inner sides of both clamping blocks are in contact with the outer wall of the bearing.

[0012] Furthermore, each of the clamping blocks is provided with a clamping groove, which is a V-shaped groove structure.

[0013] Furthermore, a connecting block is symmetrically welded to the upper end face of the base, and an adjusting rod is rotatably mounted on the connecting block. The left and right ends of the adjusting rod are threadedly connected to the two mounting arms, respectively, and the thread directions of the left and right ends of the adjusting rod are opposite.

[0014] Furthermore, a worm gear is welded onto the adjusting rod, and a worm rotates on the base, meshing with the worm gear. A motor is fixed on the base, and the output shaft of the motor is fixed on the adjusting rod. The mounting arm, clamping block, connecting block, adjusting rod, worm gear, worm, and motor together form a limiting part.

[0015] Furthermore, an anti-backflow part is installed inside the oil injection pipe. The anti-backflow part consists of a sliding seat, a sealing seat, a sliding rod, a sealing ball, and a helical spring. The sliding seat and the sealing seat are both welded to the inner wall of the oil injection pipe. The sealing seat is located below the sliding seat. A sliding rod slides on the sliding seat. A sealing ball is welded to the lower end of the sliding rod. A helical spring is sleeved on the sliding rod. Under the elastic action of the helical spring, the upper part of the outer wall of the sealing ball is in elastic contact with the bottom end face of the sealing seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This application features a reliable one-way anti-backflow function. By installing an anti-backflow section inside the oil injection pipe, the elastic force of the helical spring ensures that the sealing ball and the sealing seat maintain elastic contact at all times. During oil injection, the oil pressure pushes the sealing ball downward to create a passage. After oil injection stops, the sealing ball automatically resets and seals, completely preventing oil backflow. This design not only prevents the backflow of oil already injected into the bearing from contaminating it and ensuring the quality of oil injection, but also avoids oil waste, reduces oil injection costs, and minimizes corrosion of the device components by backflowing oil, thus extending the service life of the device.

[0017] The adjustable design of the oil injection section in this application significantly improves the adaptability and oil injection accuracy of the device. The oil injection pipe is moved by the sliding block driven by the threaded rod, and with the precise indication of the scale, the position of the oil injection pipe can be finely adjusted. It can be adapted to wind turbine bearings of different sizes and specifications without the need to replace special oil injection parts, thus reducing equipment investment costs. At the same time, the electric hydraulic cylinder drives the base plate to move up and down, which can ensure the precise docking of the oil injection pipe and the bearing during oil injection, and also make the base plate fit against the base after oil injection, which facilitates the collection of excess oil and improves the ease of operation.

[0018] The design of the limiting part in this application achieves stable clamping of the bearing, ensuring the safety and stability of the oil injection process. The clamping block with V-shaped clamping groove can be adapted to bearings of different diameters, providing high clamping flexibility and a tight fit to the outer wall of the bearing, preventing the bearing from shifting or shaking during oil injection. The motor-driven worm gear transmission drives the adjusting rod to rotate, causing the two clamping blocks to move synchronously in opposite directions. This results in high clamping efficiency and uniform force, avoiding problems such as oil injection misalignment and oil leakage caused by insufficient or incorrect manual clamping force, and reducing the intensity of manual operation.

[0019] This application features a complete oil recovery function. The collection tank on the base can collect excess oil during the oiling process, and then the oil is extracted and recycled through the discharge pipe and oil pump, realizing the recycling of oil and further reducing resource waste and environmental pollution. The overall device has a compact structure, with each component working together in coordination. The operation process is simple and does not require complicated manual intervention, which greatly improves the oiling efficiency of wind turbine bearings and provides a reliable guarantee for the maintenance of wind power equipment. It has high practical value and promising prospects for promotion. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] In the attached diagram: Figure 1 A perspective view of the wind turbine bearing unidirectional anti-backflow oil injection device according to the present invention is shown; Figure 2 The present invention is shown Figure 1 Rotated 3D image; Figure 3 A front view of the wind turbine bearing one-way anti-backflow oil injection device according to the present invention is shown; Figure 4 A partially cutaway perspective view of the wind turbine bearing anti-backflow oil injection device according to the present invention is shown. Figure 5 The present invention is shown Figure 4 Enlarged view of point A; Figure 6 A perspective view of the anti-backflow part according to the present invention is shown; Figure 7 The present invention is shown Figure 6 Enlarged view of point B; Figure 8 A perspective view of the low-altitude movement according to the present invention is shown.

[0022] List of reference numerals 1. Base; 101. Collection trough; 102. Support rod; 103. Discharge pipe; 2. Oil injection section; 201. Guide rod; 202. Base plate; 203. Frame; 204. Electric hydraulic cylinder; 205. Sliding block; 206. Oil injection pipe; 207. Seat; 208. Threaded rod; 209. Scale; 3. Limiting section; 301. Mounting arm; 302. Clamping block; 303. Connecting block; 304. Adjusting rod; 305. Worm gear; 306. Worm; 307. Motor; 4. Anti-backflow section; 401. Sliding seat; 402. Sealing seat; 403. Sliding rod; 404. Sealing ball; 405. Helical spring; 5. Bearing. Detailed Implementation

[0023] 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.

[0024] Unless otherwise defined, all terms (including technical and scientific terms) used in embodiments of this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as being interpreted in an idealized or highly formalized sense, unless expressly defined in this embodiment of the invention.

[0025] The terms "first," "second," and similar words used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Likewise, the terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, spatial and directional terms such as "upper," "lower," "front," "rear," "top," "bottom," "vertical," and "horizontal" may be used to describe embodiments of the invention; however, it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect," "link," "fix," and "attach" can refer to a direct connection between two elements or structures without other elements or structures, or to an indirect connection between two elements or structures through an intermediate element or structure, unless otherwise expressly stated herein.

[0026] Example 1: As shown in the attached document Figure 1 To be continued Figure 8 As shown: This invention provides a one-way anti-backflow oil injection device for wind turbine bearings, comprising: a base 1; a collection groove 101 is provided on the upper end face of the base 1, and support rods 102 are welded in a ring array on the inner wall of the collection groove 101. The upper part of the outer wall of the support rods 102 is flush with the upper end face of the base 1. A bearing 5 is placed on the support rods 102. A discharge pipe 103 is welded on the base 1. During the injection process, excess oil will enter the collection groove 101 for collection and will be discharged through the discharge pipe 103.

[0027] The base 1 is symmetrically welded with guide rods 201, and a base plate 202 slides on the guide rods 201. A frame 203 is fixed on the base 1. The frame 203 has a concave structure and an electric hydraulic cylinder 204 is fixed on the frame 203. The extended end of the electric hydraulic cylinder 204 is fixed on the base plate 202. The bottom surface of the base plate 202 contacts the upper surface of the bearing 5, driving the electric hydraulic cylinder 204 to extend and retract, which can drive the base plate 202 to move up and down.

[0028] Among them, a sliding block 205 slides on the substrate 202, and an oil injection pipe 206 is welded on the sliding block 205. The bottom end surface of the sliding block 205 is flush with the bottom end surface of the substrate 202. Adjusting the position of the sliding block 205 can adjust the position of the oil injection pipe 206, thereby adapting to the oiling of bearings 5 ​​of different sizes.

[0029] The base plate 202 is welded with a seat 207, which has a concave structure. A threaded rod 208 is threadedly connected to the seat 207. One end of the threaded rod 208 rotates on the sliding block 205. Rotating the threaded rod 208 can achieve precise adjustment of the sliding block 205 and the oil injection pipe 206.

[0030] Among them, a scale 209 is fixed on the sliding block 205. The scale 209 passes through the base 207. The guide rod 201, base plate 202, frame 203, electric hydraulic cylinder 204, sliding block 205, oil injection pipe 206, base 207, threaded rod 208, and scale 209 together form the oil injection part 2. During the adjustment process, the adjustment accuracy can be ensured by observing the relative position of the scale 209 and the base 207. After the oil injection is completed, the electric hydraulic cylinder 204 is driven to extend until the bottom end face of the base plate 202 is flush with the top end face of the base 1. The absorption pipe of the external oil pump is connected to the discharge pipe 103. The external oil pump can be started to pump away the excess oil in the collection tank 101.

[0031] Among them, there are two symmetrically sliding mounting arms 301 on the frame 203, and each mounting arm 301 has a clamping block 302 welded on the inner side. The inner sides of the two clamping blocks 302 are in contact with the outer wall of the bearing 5.

[0032] Each clamping block 302 has a clamping groove, which is a V-shaped groove structure. Under the action of the V-shaped groove, it can adapt to the clamping of bearings 5 ​​of different sizes, and has high clamping flexibility.

[0033] The base 1 has a connecting block 303 symmetrically welded to its upper end face. An adjusting rod 304 is rotatably mounted on the connecting block 303. The left and right ends of the adjusting rod 304 are threaded to the two mounting arms 301 respectively. The threads of the left and right ends of the adjusting rod 304 are in opposite directions.

[0034] The adjusting rod 304 is welded with a worm gear 305, and a worm 306 rotates on the base 1. The worm 306 meshes with the worm gear 305. A motor 307 is fixed on the base 1, and the output shaft of the motor 307 is fixed on the adjusting rod 304. The mounting arm 301, clamping block 302, connecting block 303, adjusting rod 304, worm gear 305, worm 306, and motor 307 together form the limiting part 3. When adjusting the position of the clamping block 302, the motor 307 is driven to rotate. Under the meshing transmission of the worm 306 and worm gear 305, the adjusting rod 304 can be rotated. Under the thread drive of the adjusting rod 304, the two clamping blocks 302 move synchronously in opposite directions, resulting in high clamping efficiency.

[0035] The oil injection pipe 206 is equipped with an anti-backflow part 4, which consists of a sliding seat 401, a sealing seat 402, a sliding rod 403, a sealing ball 404, and a coil spring 405. The sliding seat 401 and the sealing seat 402 are both welded to the inner wall of the oil injection pipe 206. The sealing seat 402 is located below the sliding seat 401. The sliding rod 403 slides on the sliding seat 401, and a sealing ball 404 is welded to the lower end of the sliding rod 403. A sleeve is fitted onto the sliding rod 403. A helical spring 405 is provided. Under the elastic action of the helical spring 405, the upper part of the outer wall of the sealing ball 404 is in elastic contact with the bottom end face of the sealing seat 402. During oil injection, the oil discharge pipe of the oil injection pump is connected to the oil injection pipe 206 for oil injection. Under the action of oil pressure, the sealing ball 404 moves downward to complete the passage of the oil injection pipe 206. When the oil injection pump stops, under the action of the helical spring 405, the sealing ball 404 returns to its original position to complete the sealing of the oil injection pipe 206 and prevent backflow.

[0036] Example 2: Based on Example 1, it also includes: the helical spring 405 with different elastic coefficients can be replaced according to the oil injection pressure requirements of the wind turbine bearing to adapt to high-pressure / low-pressure oil injection scenarios and improve the versatility of the device.

[0037] Example 3: Based on Embodiment 2, it also includes: a liquid level sensor can be installed on the inner wall of the collection tank 101, which is linked with the motor 307 and the electric hydraulic cylinder 204 to realize automatic reminder of oil overflow and automatic control of the oil filling process, thereby improving the level of intelligence.

[0038] The specific usage and function of this embodiment are as follows: In use, first place the wind turbine bearing 5 on the support rod 102; start the motor 307, which drives the two clamping blocks 302 to clamp the bearing 5 synchronously through the worm gear 306, worm wheel 305 and reverse threaded adjustment rod 304; drive the electric hydraulic cylinder 204 to adjust the height of the base plate 202, and rotate the threaded rod 208 to accurately adjust the oil injection pipe 206 to the oil injection port position with reference to the scale 209; connect the oil injection pump to start oil injection, and the oil pressure pushes open the sealing ball 404 to complete the oil injection; after stopping the injection, the spiral... Spring 405 pushes sealing ball 404 to reset the seal and prevent oil backflow; during the oil injection process, excess grease falls into collection tank 101 and is recovered through discharge pipe 103; after the oil injection is completed, reset all components and remove bearing 5. After the oil injection is completed, drive electric hydraulic cylinder 204 to extend until the bottom end of base plate 202 is flush with the top end of base 1. Connect the absorption pipe of external oil pump to discharge pipe 103 and start external oil pump to pump away excess oil in collection tank 101.

Claims

1. A one-way anti-backflow oil injection device for wind turbine bearings, characterized in that, include: The base (1) has a collection groove (101) on its upper surface. Support rods (102) are welded in a ring array on the inner wall of the collection groove (101). The upper part of the outer wall of the support rods (102) is flush with the upper surface of the base (1). A bearing (5) is placed on the support rods (102). A drain pipe (103) is welded on the base (1). During the filling process, excess oil will enter the collection groove (101) for collection. The material is discharged through the discharge pipe (103); guide rods (201) are symmetrically welded on the base (1), and a base plate (202) slides on the guide rods (201). A frame (203) is fixed on the base (1). The frame (203) has a concave structure. An electric hydraulic cylinder (204) is fixed on the frame (203). The extended end of the electric hydraulic cylinder (204) is fixed on the base plate (202). The bottom surface of the base plate (202) contacts the upper surface of the bearing (5).

2. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 1, characterized in that: A sliding block (205) is slidably mounted on the substrate (202), and an oil injection pipe (206) is welded onto the sliding block (205). The bottom surface of the sliding block (205) is flush with the bottom surface of the substrate (202).

3. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 1, characterized in that: A seat (207) is welded onto the substrate (202). The seat (207) has a concave structure and a threaded rod (208) is threaded onto the seat (207). One end of the threaded rod (208) rotates on the sliding block (205).

4. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 3, characterized in that: A scale (209) is fixed on the sliding block (205). The scale (209) passes through the base (207). The guide rod (201), base plate (202), frame (203), electric hydraulic cylinder (204), sliding block (205), oil injection pipe (206), base (207), threaded rod (208), and scale (209) together form the oil injection part (2).

5. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 1, characterized in that: The frame (203) has two symmetrically sliding mounting arms (301), and each mounting arm (301) has a clamping block (302) welded to its inner side. The inner sides of the two clamping blocks (302) are in contact with the outer wall of the bearing (5).

6. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 5, characterized in that: Each of the clamping blocks (302) is provided with a clamping groove, which is a V-shaped groove structure.

7. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 1, characterized in that: The upper end of the base (1) is symmetrically welded with a connecting block (303), and an adjusting rod (304) is rotatably mounted on the connecting block (303). The left end and the right end of the adjusting rod (304) are threadedly connected to two mounting arms (301) respectively, and the thread directions of the left end and the right end of the adjusting rod (304) are opposite.

8. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 7, characterized in that: A worm gear (305) is welded onto the adjusting rod (304), and a worm (306) rotates on the base (1). The worm (306) meshes with the worm gear (305). A motor (307) is fixed on the base (1), and the output shaft of the motor (307) is fixed on the adjusting rod (304). The mounting arm (301), clamping block (302), connecting block (303), adjusting rod (304), worm gear (305), worm (306), and motor (307) together form the limiting part (3).

9. The wind turbine bearing one-way anti-backflow oil injection device as described in claim 2, characterized in that: The oil injection pipe (206) is equipped with an anti-backflow part (4). The anti-backflow part (4) consists of a sliding seat (401), a sealing seat (402), a sliding rod (403), a sealing ball (404), and a helical spring (405). The sliding seat (401) and the sealing seat (402) are both welded to the inner wall of the oil injection pipe (206). The sealing seat (402) is located below the sliding seat (401). The sliding rod (403) slides on the sliding seat (401). The sealing ball (404) is welded to the lower end of the sliding rod (403). The helical spring (405) is sleeved on the sliding rod (403). Under the elastic action of the helical spring (405), the upper part of the outer wall of the sealing ball (404) is in elastic contact with the bottom surface of the sealing seat (402).

Images