Lubricating device for transmission shaft of wind driven generator

Abstract

The invention provides a wind driven generator transmission shaft lubricating device, and relates to the technical field of wind driven generator rotating shaft lubrication, the wind driven generator transmission shaft lubricating device comprises a mounting chamber, a driving plate, a lubricating oil cylinder, a piston, a push rod, a motor rotating shaft, a mounting shaft, a lower pressing block, a stress block and a linkage hole, the motor rotating shaft and the mounting shaft are arranged on the rear side in the mounting chamber, and the driving plate is arranged at the front end of the mounting shaft; a lower pressing block is arranged on the front side of the driving plate, a lubricating oil cylinder is arranged below the driving plate, a piston is arranged in the lubricating oil cylinder, a push rod is arranged on the upper side of the piston, a stress block is arranged on the upper side of the push rod, and a linkage hole is formed in the front side of the stress block. Compared with the prior art, the lubricating device has the advantages that the rotating shaft can be automatically lubricated according to rotation of the rotating shaft; lubricating oil can be conveniently added.

Description

Technical Field

[0001] This invention relates to the field of shaft lubrication technology, and in particular to a lubrication device for the drive shaft of a wind turbine. Background Technology

[0002] Existing wind turbine shaft lubrication devices typically use oil or grease lubrication, requiring regular oiling or grease replacement. Moreover, the lubrication effect is greatly affected by environmental factors, and poor lubrication can easily lead to shaft wear and reduce the service life of the wind turbine.

[0003] A bearing lubrication device for wind turbine generator sets, disclosed in CN217632779U, includes a generator housing, a rotating shaft, and a lubrication box. A bearing is internally mounted in the generator housing, and the rotating shaft passes through the bearing. An end cover is located on one side of the generator housing. A positioning groove is provided on the outer wall of one side of the end cover, and a sealing ring is mounted within the positioning groove. An oil-sealing claw is located on one side of the sealing ring and is fitted onto the rotating shaft. One end of the oil-sealing claw is connected to the inner ring of the bearing. A pressure plate is located on the side of the end cover near the sealing ring. An oil injection hole penetrating the pressure plate and the sealing ring is provided on the outer wall of the pressure plate, and the pressure plate is engaged with the lubrication box. The purpose of this device is to solve the problems of lubricating oil flowing out along the rotating shaft and the inconvenience of disassembly and oil injection in existing bearing lubrication devices.

[0004] While the aforementioned lubrication device solves some of the problems, it still has the following drawbacks: (1) The shaft needs to be manually lubricated, and the rotation of the shaft cannot be used to lubricate automatically.

[0005] (2) In order to make full use of wind power, wind turbines often have their blades installed high and large. When adding lubricating oil, it is necessary to climb up manually, which is cumbersome and troublesome. Summary of the Invention

[0006] In view of this, the present invention aims to provide a lubrication device for the drive shaft of a wind turbine generator to solve or alleviate the technical problems existing in the prior art.

[0007] The technical solution of this invention is implemented as follows: A lubrication device for a wind turbine drive shaft, comprising: The mounting chamber has a motor shaft and a mounting shaft rotatably connected to its rear ends on both sides. A drive gear is fixedly connected to the front end of the motor shaft, and a driven gear is rotatably connected to the front end of the mounting shaft. The drive gear meshes with the driven gear. A drive plate is fixedly connected to the front side of the driven gear, and a pressing block adapted to the linkage hole is fixedly connected to the front edge of the drive plate. A lubricating oil cylinder is installed at the bottom of the installation chamber. A piston is installed inside the lubricating oil cylinder, and a push rod is fixedly connected to the upper side of the piston. A force-bearing block is fixedly connected to the upper end of the push rod, and a linkage hole is opened on the front side of the force-bearing block. An oil inlet pipe and an oil outlet pipe are fixedly connected to the lower sides of the outside of the lubricating oil cylinder, respectively. Both the oil inlet pipe and the oil outlet pipe are equipped with a one-way conveying structure. An oil storage tank is located at the lower outside of the lubricating oil cylinder. The motor shaft drives the drive gear and the driven gear to rotate, so that the drive plate rotates synchronously. The lower pressure block drives the force-bearing block, the push rod and the piston to reciprocate through the linkage hole. With the help of the one-way conveying structure, the lubricating oil is extracted and conveyed, and finally the automatic lubrication of the motor shaft is completed, which meets the lubrication requirements of the wind turbine for long-term stable operation.

[0008] To achieve unidirectional delivery of lubricating oil and prevent backflow from affecting the lubrication effect, the unidirectional delivery structure includes a sleeve embedded inside the oil inlet pipe and the oil outlet pipe. A flow-blocking ring block and a flow-passing ring block are fixedly connected to both ends of the sleeve. Flow-passing holes are evenly distributed on the lower outer side of the flow-passing ring block. A flow-blocking ball is positioned between the flow-blocking ring block and the flow-passing ring block. In the oil inlet pipe, the flow-blocking ring block is at the bottom and the flow-passing ring block is at the top; in the oil outlet pipe, the flow-blocking ring block is at the top and the flow-passing ring block is at the bottom. By moving the flow-blocking ball up and down, the unidirectional delivery effect is achieved: the oil inlet pipe is open when oil is sucked in, and the oil outlet pipe is closed when oil is pressed in.

[0009] To achieve precise spraying and efficient lubrication of lubricating oil, a lubricating oil nozzle is installed on the rear side of the installation chamber above the motor shaft. The lubricating oil nozzle is connected to the oil outlet pipe through an oil spray pipe. The lubricating oil nozzle is oriented towards the motor shaft, which can evenly spray the delivered lubricating oil onto the lubrication surface of the shaft, reducing lubricating oil waste and improving lubrication efficiency.

[0010] To facilitate lubricant addition and reduce maintenance difficulty, the oil inlet pipe is connected to the oil storage tank via an oil extraction pipe. One end of the oil extraction pipe is fixedly connected to the lower end of the oil inlet pipe, and the other end is inserted into the oil storage tank, which is located at the lower end of the wind turbine's outer casing. Operators can add lubricant to the oil storage tank from the ground without climbing the equipment, significantly reducing maintenance difficulty and safety risks.

[0011] To ensure the device's airtightness and prevent lubricating oil leakage, a sealed rotary bearing is installed between the output shaft of the stirring structure and the stirring tank; this ensures the output shaft can rotate freely while preventing fertilizer from leaking out of gaps, thus improving the device's airtightness.

[0012] To ensure stable power transmission and prevent component jamming, the meshing clearance between the drive gear and the driven gear is appropriately matched, and the lower pressure block fits snugly against the inner wall of the linkage hole and slides smoothly. This reduces energy loss during transmission, ensures the stability of the piston's reciprocating motion, and improves the reliability of the device's operation. To adapt to outdoor wind power environments, no external power source is required. The device is driven entirely by the rotational power of the motor shaft, eliminating the need for additional power supplies or drive equipment. This fully utilizes the device's own power, saving energy and protecting the environment, thus meeting the unattended operation requirements of wind farms.

[0013] To guide the smooth flow of lubricating oil and prevent accumulation and blockage, the interior of the lubricating oil cylinder is smoothly designed, and the oil inlet pipe, oil outlet pipe, and oil spray pipe are all made of corrosion-resistant and low-friction materials; this reduces the flow resistance of lubricating oil, prevents pipe blockage caused by oil buildup, and extends the service life of the device.

[0014] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions: This invention uses the motor shaft's own power to convert rotational motion into piston reciprocating motion, and with the help of a unidirectional conveying structure, it achieves automatic lubrication without manual intervention, making it suitable for high-altitude operation scenarios of wind turbine generators.

[0015] This invention places the oil storage tank at the bottom of the equipment and uses an oil extraction pipe to achieve ground oil replenishment, which is convenient to operate and reduces maintenance costs and safety risks.

[0016] This invention avoids lubricating oil backflow through a unidirectional conveying structure, and the lubricating oil nozzle sprays precisely, thereby improving lubrication stability and resource utilization and reducing shaft wear.

[0017] This invention has a simple structure, no complex electronic control system, strong resistance to harsh environments, reliable operation, and can significantly extend the service life of wind turbines and reduce equipment failure rate.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This invention relates to a three-dimensional lubrication device for a wind turbine drive shaft. Figure 1 ; Figure 2 This invention relates to a three-dimensional lubrication device for a wind turbine drive shaft. Figure 2 ; Figure 3 This is a front cross-sectional view of a wind turbine drive shaft lubrication device according to the present invention; Figure 4 This is a three-dimensional enlarged view of the unidirectional conveying mechanism of a wind turbine drive shaft lubrication device according to the present invention; Figure 5 This is an enlarged cross-sectional view of the unidirectional conveying mechanism of a wind turbine drive shaft lubrication device according to the present invention.

[0021] The diagram shows: 1. Installation chamber; 2. Drive plate; 3. Lubricating oil cylinder; 4. Unidirectional conveying structure; 401. Flow-blocking ring block; 402. Flow-passing ring block; 403. Flow-passing hole; 404. Sleeve; 405. Flow-blocking ball; 5. Oil reservoir; 6. Motor shaft; 7. Installation shaft; 8. Drive gear; 9. Driven gear; 10. Lower pressure block; 11. Piston; 12. Push rod; 13. Force-bearing block; 14. Linkage hole; 15. Oil inlet pipe; 16. Oil outlet pipe; 17. Lubricating oil nozzle; 18. Oil spray pipe; 19. Oil extraction pipe. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0023] It is important to note that terms such as "first," "second," "symmetric," and "array" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features. In this invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "fixation" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the accompanying drawings and specific circumstances.

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, an embodiment of the present invention provides a lubrication device for a wind turbine drive shaft, comprising: Installation chamber 1 serves as the installation carrier and protective casing for the device; The installation chamber 1 is a closed cavity structure, fixed in the shaft installation area inside the wind turbine. The motor shaft 6 and the installation shaft 7 are rotatably connected to the two sides of the rear end of the chamber, forming the installation reference of the transmission core. The motor shaft 6 is the original power output shaft of the wind turbine, and the front end is fixedly connected to the drive gear 8. The installation shaft 7 is set parallel to the motor shaft 6, and the front end is rotatably connected to the driven gear 9. The drive gear 8 and the driven gear 9 are meshed and matched to ensure stable power transmission without jamming.

[0026] The transmission module is used to convert the rotational motion of the motor shaft 6 into linear reciprocating motion. The transmission module is located inside the front of the installation chamber 1, and its core function is to convert the power source. Specifically, it includes: The drive plate 2 is fixedly connected to the front side of the driven gear 9 and rotates synchronously with the driven gear 9. A lower pressure block 10 is fixedly connected to its front edge. The lower pressure block 10 is a cylindrical structure that fits tightly against the inner wall of the linkage hole 14 of the force block 13 and slides smoothly, reducing transmission energy loss.

[0027] Linkage structure: The lower pressure block 10 is embedded in the linkage hole 14 of the force receiving block 13. The linkage hole 14 is racetrack-shaped (semi-circular on both sides and rectangular in the middle), which can offset the lateral displacement when the lower pressure block 10 rotates and only transmits the up-and-down reciprocating driving force to ensure accurate power conversion.

[0028] The lubrication actuator module is used to extract and pressurize lubricating oil for delivery. The lubrication execution module is located at the bottom of the installation chamber 1 and is the core execution unit for the lubrication action. Specifically, it includes: The lubricating oil cylinder 3 is vertically fixed to the bottom of the installation chamber 1. It has a hollow cylindrical structure with a smooth interior to reduce the resistance to lubricating oil flow. The lower ends of the cylinder are respectively fixedly connected to an oil inlet pipe 15 and an oil outlet pipe 16 for the introduction and export of lubricating oil.

[0029] Piston 11 is adapted to be installed inside lubricating oil cylinder 3 and can slide up and down along the cylinder wall to realize the suction and pressurization of oil. A push rod 12 is fixedly connected to the upper side of piston 11, and a force block 13 is vertically fixedly connected to the upper end of push rod 12. A linkage hole 14 adapted to the lower pressure block 10 is opened on the front side of force block 13. The up and down movement of force block 13 is transmitted to piston 11 through push rod 12.

[0030] The unidirectional delivery module is used to ensure the unidirectional flow of lubricating oil and prevent backflow. The unidirectional conveying modules are embedded inside the oil inlet pipe 15 and the oil outlet pipe 16 respectively, ensuring unidirectional flow during the oil suction and pressure processes. Specifically, they include: Sleeve 404 is embedded inside the oil inlet pipe 15 and the oil outlet pipe 16. It is a hollow cylindrical structure with open ends and serves as the mounting carrier for the one-way control component.

[0031] The flow-blocking ring 401 and the flow-through ring 402 are fixedly connected to the two ends inside the sleeve 404, respectively; the flow-blocking ring 401 is at the bottom and the flow-through ring 402 is at the top in the oil inlet pipe 15, and the flow-blocking ring 401 is at the top and the flow-through ring 402 is at the bottom in the oil outlet pipe 16; flow holes 403 are evenly opened on the lower outer side of the flow-through ring 402 to allow lubricating oil to flow.

[0032] The flow-blocking ball 405 is positioned between the flow-blocking ring block 401 and the flow-passing ring block 402, and can move up and down with the hydraulic pressure difference of the oil. When the oil is sucked in, the flow-blocking ball 405 adheres to the flow-passing ring block 402, allowing only the lubricating oil to pass through the flow-passing hole 403. When the oil is pressed out, the flow-blocking ball 405 adheres to the flow-blocking ring block 401, cutting off the return channel and realizing unidirectional conveying.

[0033] The oil storage and replenishment module is used for storing and conveniently replenishing lubricating oil. The oil storage and replenishment module is located at the lower end of the wind turbine's casing for easy ground operation, and specifically includes: - The oil storage tank 5 is a sealed tank structure with a capacity L that can meet the needs of continuous operation for days. Its position is lower than that of the lubricating oil cylinder 3 and it is connected to the oil inlet pipe 15 through the oil extraction pipe 19.

[0034] - The oil extraction pipe 19 is fixedly connected at one end to the lower end of the oil inlet pipe 15, and the other end is inserted into the oil tank 5 below the oil surface. It is made of corrosion-resistant and low-friction material to avoid oil sludge accumulation and blockage. Operators do not need to climb the equipment and can add lubricating oil to the oil tank 5 from the ground, reducing maintenance risks.

[0035] The precision lubrication module is used to evenly spray lubricating oil onto the shaft lubrication surface. The precision lubrication module is located inside the rear of the mounting chamber 1, corresponding to the lubrication area of ​​the motor shaft 6, and specifically includes: The lubricating oil nozzle 17 is installed on the upper side of the motor shaft 6 and is positioned towards the lubrication surface of the shaft. It can evenly spray the lubricating oil to the target area and reduce waste.

[0036] The oil injection pipe 18 is fixedly connected at one end to the oil outlet pipe 16 and at the other end to the lubricating oil nozzle 17. It is made of corrosion-resistant material to ensure stable delivery of lubricating oil.

[0037] Auxiliary support structure Sealing structure: Sealing gaskets are used at all pipeline connection points, and wear-resistant sealing material is used at the contact point between the lubricating oil cylinder 3 and the piston 11 to prevent lubricating oil leakage.

[0038] Material compatibility: The oil inlet pipe 15, oil outlet pipe 16, oil injection pipe 18 and oil extraction pipe 19 are all made of corrosion-resistant and low-friction materials, which are suitable for the extreme environment of outdoor wind power and extend the service life of the device.

[0039] In specific implementation of the present invention Initial oil replenishment: The operator adds sufficient lubricating oil to the oil storage tank 5 on the ground, ensuring that the lower end of the oil extraction pipe 19 is submerged below the oil surface, thus completing the initial oil supply preparation of the device.

[0040] Power transmission and motion conversion: When the wind turbine is running, the motor shaft 6 drives the front drive gear 8 to rotate, which in turn drives the driven gear 9 and the drive plate 2 fixed on it to rotate synchronously. The lower pressure block 10 on the edge of the drive plate 2 slides along the linkage hole 14, which drives the force block 13, push rod 12 and piston 11 to reciprocate in the lubricating oil cylinder 3.

[0041] Oil suction process: When piston 11 moves upward, the pressure inside lubricating oil cylinder 3 decreases, and the flow-blocking ball 405 in oil inlet pipe 15 moves upward to fit against the flow-passing ring block 402. Lubricating oil is sucked into lubricating oil cylinder 3 through oil suction pipe 19 and flow-passing hole 403 of oil inlet pipe 15. At this time, the flow-blocking ball 405 in oil outlet pipe 16 moves upward to fit against the flow-blocking ring block 401, cutting off the passage of oil outlet pipe 16 and preventing backflow.

[0042] Oil pressure lubrication: When piston 11 moves down, the pressure inside lubricating oil cylinder 3 increases, the flow-blocking ball 405 in oil inlet pipe 15 moves down to fit against flow-blocking ring block 401, and closes the oil inlet passage; the flow-blocking ball 405 in oil outlet pipe 16 moves down to fit against flow-passing ring block 402, and the lubricating oil is delivered to lubricating oil nozzle 17 through oil outlet pipe 16 and oil spray pipe 18, and evenly sprayed onto the lubrication surface of motor shaft 6, completing one lubrication cycle.

[0043] Continuous operation and oil replenishment: The device rotates continuously with the motor shaft 6 to achieve periodic automatic lubrication; when the lubricating oil level in the oil tank 5 is too low, the operator can add oil directly on the ground without stopping the machine or working at height.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A lubrication device for a wind turbine drive shaft, characterized in that, include: The installation chamber (1) has a motor shaft (6) and an installation shaft (7) rotatably connected to the rear sides of the interior. The front end of the motor shaft (6) is fixedly connected to a drive gear (8), and the front end of the installation shaft (7) is rotatably connected to a driven gear (9). The drive gear (8) meshes with the driven gear (9). The drive plate (2) is fixedly connected to the front side of the driven gear (9), and the front edge is fixedly connected to the pressure block (10). A lubricating oil cylinder (3) is located at the bottom of the installation chamber (1). A piston (11) is installed inside the cylinder. An oil inlet pipe (15) and an oil outlet pipe (16) are fixedly connected to the lower sides of the cylinder. A push rod (12) is fixedly connected to the upper side of the piston (11). A force-bearing block (13) is fixedly connected to the upper end of the push rod (12). A linkage hole (14) is opened on the front side of the force-bearing block (13), and the lower pressure block (10) is adapted to the interior of the linkage hole (14). A unidirectional conveying structure (4) is respectively installed inside the oil inlet pipe (15) and the oil outlet pipe (16); The oil reservoir (5) is located below the outside of the lubricating oil cylinder (3).

2. The wind turbine drive shaft lubrication device according to claim 1, characterized in that: A lubricating oil nozzle (17) is provided on the upper side of the motor shaft (6), and the lubricating oil nozzle (17) is connected to the oil outlet pipe (16) through an oil spray pipe (18).

3. The wind turbine drive shaft lubrication device according to claim 1, characterized in that, The unidirectional conveying structure (4) includes: The flow-blocking ring block (401) is respectively disposed on the lower side inside the oil inlet pipe (15) and the upper side inside the oil outlet pipe (16); The flow ring block (402) is respectively installed on the upper side inside the oil inlet pipe (15) and the lower side inside the oil outlet pipe (16); The flow holes (403) are evenly distributed on the lower side of the outer side of the flow ring block (402); The sleeve (404) is fitted inside the oil inlet pipe (15) and the oil outlet pipe (16), and the flow-blocking ring block (401) and the flow-through ring block (402) are respectively fixedly connected to the two ends inside the sleeve (404); The flow-blocking ball (405) is disposed inside the sleeve (404) and is located between the flow-blocking ring block (401) and the flow-through ring block (402).

4. The lubrication device for a wind turbine drive shaft according to claim 1, characterized in that: The oil inlet pipe (15) is connected to the oil storage tank (5) by an oil extraction pipe (19). One end of the oil extraction pipe (19) is fixedly connected to the lower end of the outside of the oil inlet pipe (15), and the other end of the oil extraction pipe (19) is inserted into the inside of the oil storage tank (5).

5. A lubrication device for a wind turbine drive shaft according to claim 1, characterized in that: The oil storage tank (5) is located at the lower end of the wind turbine casing.

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