Oil discharge structure of wind power yaw speed reducer
By designing annular oil tank and vertical oil guide tank on the inner wall of the lower box of the wind power yaw reducer, the problem that the oil discharge structure in the prior art cannot completely drain waste oil is solved, and more efficient oil and impurities are achieved, and the service life of the reducer is extended.
Patent Information
- Application Number
- CN202422007158.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The oil discharge structure of the existing wind power yaw reducer cannot completely emptiate the waste oil in the reducer, resulting in the contamination of the new oil and unable to effectively protect the reducer. Iron chips and other impurities are easily entered into the bearings and oil seals, resulting in failure.
A wind power yaw reducer oil discharge structure is designed, including opening an annular oil groove and a vertical oil guide groove on the inner wall of the lower box, the oil drain hole is opened on the outer periphery of the annular oil groove, and connected to the oil pool through the vertical oil guide groove, improving the discharge efficiency of oil and impurities.
It effectively improves the oil discharge efficiency and waste oil discharge rate, improves the cleanliness and oil life after oil change, reduces iron chip residue, reduces the probability of failure of bearing or skeleton oil seals, and extends the service life of the reducer.
Smart Images
Figure CN222823708U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an oil discharge structure for a wind power yaw reducer, belonging to the technical field of yaw reducer assembly. Background Art
[0002] The yaw reducer used in wind power generation is installed vertically in the nacelle and has a service life of about 20 to 25 years. The gears inside the reducer are lubricated by oil immersion in an oil pool. Due to the long service life of the reducer, the lubricating oil cannot meet this life requirement, so the lubricating oil needs to be replaced regularly.
[0003] At present, the conventional oil discharge structure cannot completely drain the waste oil in the reducer, resulting in the new oil being contaminated by the residual waste oil, and the reducer cannot be effectively protected. In the existing yaw reducer oil discharge structure, the drain plug is located above the bearing, and there is a certain distance from the oil pool formed between the bearing and the skeleton oil seal, resulting in the oil in the oil pool cannot be discharged. Due to normal wear and tear during the operation of the reducer, the iron filings generated will sink to the bottom of the oil pool, and the bottom of the oil pool is smooth. Impurities such as iron filings generated during the operation of the yaw reducer can easily enter the bearing and the oil seal lip, causing the bearing and oil seal to fail. Utility Model Content
[0004] The oil discharge structure of the wind turbine yaw reducer of the utility model improves the oil discharge efficiency, enables the oil and impurities in the oil pool to be effectively discharged, and increases the waste oil discharge rate, thereby improving the oil cleanliness and oil life after oil change, reducing the residual amount of iron filings in the oil pool, reducing the probability of bearing or skeleton oil seal failure due to iron filings, and extending the service life of the wind turbine yaw reducer.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] The oil discharge structure of a wind turbine yaw reducer comprises a lower housing, a bearing assembled in the lower housing, a skeleton oil seal assembled in the lower housing and located below the bearing, an oil drain hole is arranged on the side wall of the lower housing, an oil drain plug is arranged in the oil drain hole, an oil pool is formed between the bearing and the skeleton oil seal, and the structure is characterized in that an annular oil groove located at the periphery of the skeleton oil seal and connected to the oil pool and a vertical oil guide groove arranged along the axial direction of the lower housing are arranged on the inner wall of the lower housing, the oil drain hole is arranged on the periphery of the annular oil groove, and is connected to the oil pool through the vertical oil guide groove.
[0007] Preferably, the number of the vertical oil guide grooves is two and they correspond to the oil drain holes one by one. The vertical oil guide grooves are opened on the outer periphery of the bearing and extend downward to the outer periphery of the annular oil groove.
[0008] Preferably, a downwardly inclined oil guide slope is formed between the annular oil groove and the oil pool, the bottom surface of the vertical oil guide groove is lower than the bottom surface of the annular oil groove, and the bottom end of the oil drain hole is not higher than the bottom surface of the annular oil groove.
[0009] Preferably, a thickened plate corresponding to the vertical oil guide grooves is integrally formed on the side wall of the lower box body, and the oil drain hole is provided on the thickened plate.
[0010] Preferably, the oil drain plug is a magnetic plug that can absorb iron filings.
[0011] The beneficial effects of the utility model are:
[0012] The utility model discloses an oil discharge structure for a wind turbine yaw reducer, an oil pool is formed between the bearing and the skeleton oil seal, an annular oil groove is arranged on the outer periphery of the skeleton oil seal and is connected with the oil pool, that is, an annular oil groove with a lower height is arranged on the outer periphery of the oil pool, and the oil will flow from the oil pool to the annular oil groove when draining the oil, a vertical oil guide groove is arranged on the lower housing, the oil pool and the oil drain hole are connected through the vertical oil guide groove, and the oil is guided to the oil drain hole through the vertical oil guide groove when draining the oil, so as to improve the oil drain efficiency, and the oil drain hole is arranged on the outer periphery of the annular oil groove, and there is no axial height difference between the oil drain hole and the annular oil groove, so that the oil and impurities in the oil pool can be effectively discharged, and the waste oil discharge rate is improved, so as to improve the cleanliness of the oil and the oil life after the oil change, reduce the residual amount of iron filings in the oil pool, reduce the probability of failure of the bearing or the skeleton oil seal due to iron filings, and extend the service life of the wind turbine yaw reducer. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the oil discharge structure of the wind turbine yaw reducer set on the wind turbine yaw reducer.
[0014] Figure 2 Schematic diagram of the lower box.
[0015] Figure 3 for Figure 1 sectional view of .
[0016] Figure 4 for Figure 1 Another cross-sectional view of .
[0017] Figure 5 for Figure 3 A partial enlarged schematic diagram of . DETAILED DESCRIPTION
[0018] Combine the following Figures 1 to 5 The embodiments of the utility model are described in detail.
[0019] The oil discharge structure of the wind turbine yaw reducer comprises a lower housing 1, a bearing 2 assembled in the lower housing 1, a skeleton oil seal 3 assembled in the lower housing 1 and located below the bearing 2, an oil drain hole 4 is arranged on the side wall of the lower housing 1, an oil drain plug 5 is arranged in the oil drain hole 4, an oil pool 6 is formed between the bearing 2 and the skeleton oil seal 3, and the structure is characterized in that an annular oil groove 7 located on the outer periphery of the skeleton oil seal 3 and connected to the oil pool and a vertical oil guide groove 8 arranged along the axial direction of the lower housing 1 are arranged on the inner wall of the lower housing 1, the oil drain hole 4 is arranged on the outer periphery of the annular oil groove 7, and is connected to the oil pool 6 through the vertical oil guide groove 8.
[0020] In the oil discharge structure of the wind turbine yaw reducer described above, an oil pool 6 is formed between the bearing 2 and the skeleton oil seal 3, and an annular oil groove 7 is opened on the outer periphery of the skeleton oil seal 3 and connected with the oil pool 6, that is, an annular oil groove 7 with a lower height is opened on the outer periphery of the oil pool 6, and the oil will flow from the oil pool 6 to the annular oil groove 7 when draining the oil, and a vertical oil guide groove 8 is opened on the lower housing 1, and the oil pool 6 and the oil drain hole 4 are connected through the vertical oil guide groove 8. When draining the oil, the oil is guided to the oil drain hole 4 through the vertical oil guide groove 8, so as to improve the oil drain efficiency, and the oil drain hole 4 is opened on the outer periphery of the annular oil groove 7, and there is no axial height difference between the oil drain hole 4 and the annular oil groove 7, so that the oil and impurities in the oil pool can be effectively discharged, and the waste oil discharge rate is improved, thereby improving the cleanliness of the oil and the oil life after oil change, reducing the residual amount of iron filings in the oil pool 6, reducing the probability of failure of the bearing or skeleton oil seal due to iron filings, and extending the service life of the wind turbine yaw reducer.
[0021] There are two vertical oil guide grooves 8 and they correspond to the oil drain holes 4 one by one. The vertical oil guide grooves 8 are arranged on the outer periphery of the bearing 2 and extend downward to the outer periphery of the annular oil groove 7. The vertical oil guide grooves 8 are arranged axially, and the reducer is installed vertically so that the vertical oil guide grooves 8 are arranged vertically. When draining oil, the vertical oil guide grooves 8 guide the oil in the inner cavity of the reducer into the oil drain hole 4 to improve the oil drain efficiency. The vertical oil guide grooves 8 extend to the outer periphery of the annular oil groove 7, so that the vertical oil grooves 8 are connected to the oil pool 6 and the annular oil groove 7. A part of the oil and impurities in the oil pool 6 will be directly discharged from the oil pool 6 through the vertical oil grooves 8 and the oil drain hole 4, and the other part will flow downward to the annular oil groove 7 and be discharged through the vertical oil grooves 8 and the oil drain hole 4, so that the oil in the oil pool 6 can be effectively discharged.
[0022] Among them, a downwardly inclined oil guide slope 71 is formed between the annular oil groove 7 and the oil pool 6, the bottom surface of the vertical oil guide groove 8 is lower than the bottom surface of the annular oil groove 7, and the bottom end of the oil drain hole 4 is not higher than the bottom surface of the annular oil groove 7. When draining the oil, the oil in the oil pool can flow into the annular oil groove 7 through the oil guide slope 71, and flow from the annular oil groove 7 to the bottom surface of the vertical oil guide groove 8, and be discharged through the oil drain hole 4. The bottom surfaces of the oil pool 6, the annular oil groove 7 and the vertical guide groove 8 are successively lowered, which is conducive to the downward flow of the oil in the oil pool, so that the oil and impurities in the oil pool can be effectively discharged, and the waste oil discharge rate is improved.
[0023] Among them, a thickened plate 9 corresponding to the vertical oil guide groove 8 is integrally formed on the side wall of the lower box body 1, and the oil drain hole 4 is opened on the thickened plate 9. Since the oil drain hole 4 moves down to the outer periphery of the annular oil groove 7, the wall thickness of the lower box body 1 at the location of the oil drain hole 4 becomes thinner. In order to ensure the sealing reliability of the oil drain screw 5, a thickened plate 9 is provided on the lower box body 1, and the oil drain hole 4 is opened on the thickened plate 9 to increase the depth of the oil drain hole 4, so as to ensure that the oil drain screw 5 can be effectively fastened and assembled with the oil drain hole 4, and ensure the sealing reliability of the oil drain screw 5 to the oil drain hole 4 when the reducer is operating normally.
[0024] The oil drain plug 5 is a magnetic plug that can absorb iron chips. The oil drain plug 5 can absorb iron chips in the oil. When draining the oil, the absorbed iron chips can be taken out by removing the oil drain plug 5, further improving the discharge rate of iron chips, reducing the probability of bearing or frame oil seal failure due to iron chips, and extending the service life of the wind power yaw reducer.
[0025] The above is a complete description of the technical solutions of the embodiments of the utility model in combination with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
Claims
1. The oil discharge structure of the wind turbine yaw reducer includes a lower box, a bearing assembled in the lower box, and a skeleton oil seal assembled in the lower box and located below the bearing. An oil drain hole is provided on the side wall of the lower box, and an oil drain plug is installed in the oil drain hole. An oil pool is formed between the bearing and the skeleton oil seal, and the characteristics are: An annular oil groove located on the periphery of the skeleton oil seal and connected to the oil pool and a vertical oil guide groove arranged along the axial direction of the lower box are provided on the inner wall of the lower box body. The oil drain hole is provided on the periphery of the annular oil groove and connected to the oil pool through the vertical oil guide groove.
2. The oil discharge structure of the wind turbine yaw reducer according to claim 1 is characterized in that: The number of the vertical oil guide grooves is two and they correspond to the oil drain holes one by one. The vertical oil guide grooves are arranged on the outer periphery of the bearing and extend downward to the outer periphery of the annular oil groove.
3. The oil discharge structure of the wind turbine yaw reducer according to claim 2 is characterized in that: A downwardly inclined oil guide slope is formed between the annular oil groove and the oil pool, the bottom surface of the vertical oil guide groove is lower than the bottom surface of the annular oil groove, and the bottom end of the oil drain hole is not higher than the bottom surface of the annular oil groove.
4. The oil discharge structure of the wind turbine yaw reducer according to claim 1 is characterized in that: A thickened plate corresponding to the vertical oil guide grooves is integrally formed on the side wall of the lower box body, and the oil drain hole is arranged on the thickened plate.
5. The oil discharge structure of the wind turbine yaw reducer according to claim 1 is characterized by: The oil drain plug is a magnetic plug that can absorb iron filings.