Wind power speed reducer with maintainable output end sealing element
By designing large and small tapered bearings at the output end of the wind power reducer and setting up a connecting sleeve to arrange a skeleton oil seal, the problem of the inability to replace the seal at the output end is solved, the replaceability of the seal and the compactness of the overall structure are achieved, and maintenance costs and weight are reduced.
Patent Information
- Application Number
- CN202510302678.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-05-06
AI Technical Summary
Due to structural limitations, the existing wind power yaw and pitch reducer output seals cannot be replaced directly, resulting in the entire reducer being replaced or rebuilt and repaired when the seal is leaked, which is expensive and inconvenient.
A wind power reducer with maintenance-attached output seal is designed. By setting a large tapered bearing and a small tapered bearing on the output shaft, and setting a connecting sleeve between the small tapered bearing and the output shaft, a sealing cavity is formed to arrange a skeleton oil seal to achieve sealing, and axially pre-tightening assembly is performed by screwing a circular nut to lock the tapered bearing.
The replaceability of the output seal is achieved, maintenance costs are reduced, the overall height and weight of the reducer are reduced, while improving the compactness and cost advantages of the structure.
Smart Images
Figure CN119934217A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of reducers, and in particular to a wind power reducer with maintainable output end seals, which can be used in various industrial engineering machinery, and is particularly suitable for yaw and pitch reducers of wind turbine generator sets. Background Art
[0002] Generally, the life of an onshore wind turbine is 20 years, and the life of an offshore wind turbine is 25 years. For wind turbine yaw and pitch reducers, their design life needs to reach the life of the wind turbine.
[0003] Usually, some structural parts (such as housing, planetary carrier, etc.) and transmission parts (such as gears, bearings, etc.) inside the reducer can meet the life requirements through design calculations and other methods, and are not design bottlenecks.
[0004] However, for some vulnerable and consumable parts, especially seals, rubber has the problem of wear and aging, and it is impossible to achieve the life requirement of at least 20 years. Therefore, the seal parts on the reducer are generally designed to be easy to replace. During the maintenance of the reducer, the seals are replaced irregularly according to the actual use. For example, when replacing the seals at the input end of the wind power yaw and pitch reducer, the motor can be removed and replaced directly, which is more convenient and has a higher accessibility.
[0005] However, the inventors of the present application have discovered that due to structural limitations, the seals at the output end of the wind turbine yaw and pitch reducer have a reachability of 0 and cannot be replaced. When lubricating oil leakage occurs at the output end of the reducer, the current solution is to replace the entire reducer or return the reducer to the factory for disassembly and repair.
[0006] Obviously, this solution is also a helpless move. Therefore, how to provide a wind power reducer with maintainable output end seals, so that the output end seals are replaceable, has become a technical problem that those skilled in the art need to solve urgently. Summary of the invention
[0007] The object of the present invention is to provide a wind turbine reducer with maintainable output end seals, so as to solve the technical problem that the output end seals of existing wind turbine yaw and pitch reducers cannot be directly replaced.
[0008] In order to achieve the above object, the present invention adopts the following technical scheme: A wind power reducer with maintainable output end seals comprises: an output shaft, wherein the output shaft is supported by a large tapered bearing and a small tapered bearing; a connecting sleeve is arranged between the small tapered bearing and the output shaft, and the connecting sleeve and a lower box body form a sealing cavity which can be used to arrange a skeleton oil seal and achieve sealing.
[0009] In actual application, when the large tapered bearing and the small tapered bearing are axially preloaded and assembled, the round nut is screwed so that the round nut drives the connecting sleeve to generate axial displacement on the output shaft and the tapered bearing is locked.
[0010] The lower housing is made of alloy steel, and the wall thickness of the lower housing is reduced at the bearing installation position.
[0011] Specifically, the skeleton oil seal is arranged above the small tapered bearing.
[0012] Compared with the prior art, the wind power reducer with maintainable output end seals described in the present invention has the following advantages: In the wind power reducer with maintainable output end seal provided by the present invention, since the output shaft is supported by a large tapered bearing and a small tapered bearing, a connecting sleeve is arranged between the small tapered bearing and the output shaft, and the connecting sleeve and the lower box body form a sealing cavity that can be used to arrange a skeleton oil seal and achieve sealing; therefore, the wind power reducer with maintainable output end seal provided by the present invention has a replaceable output end seal, and the overall structure of the reducer is more compact, low in height, light in weight, and more cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic structural diagram of a wind power reducer with maintainable output end seal provided in an embodiment of the present invention.
[0014] Reference numerals: 1-output shaft; 2-large tapered bearing; 3-lower housing; 4-round nut; 5-skeleton oil seal; 6-small tapered bearing; 7-connecting sleeve. DETAILED DESCRIPTION
[0015] In the prior art, the output end structure of a conventional wind power reducer is usually such that a skeleton oil seal is arranged between a large tapered bearing and a small tapered bearing, resulting in no space for replacing the skeleton oil seal.
[0016] For ease of understanding, the wind power reducer with maintainable output end seal provided by an embodiment of the present invention is described in detail below in conjunction with the accompanying drawings of the specification.
[0017] The embodiment of the present invention provides a wind power reducer with maintainable output end seal, such as Figure 1 As shown, it includes: an output shaft 1, and the output shaft 1 is supported by a large tapered bearing 2 and a small tapered bearing 6; a connecting sleeve 7 is arranged between the small tapered bearing 6 and the output shaft 2, and the connecting sleeve 7 and the lower box body 3 form a sealing cavity that can be used to arrange a skeleton oil seal 5 and achieve sealing.
[0018] Compared with the prior art, the wind power reducer with maintainable output end seals described in the embodiment of the present invention has the following advantages: In the wind power reducer with maintainable output end seal provided by the embodiment of the present invention, since the output shaft 1 is supported by the large tapered bearing 2 and the small tapered bearing 6, a connecting sleeve 7 is arranged between the small tapered bearing 6 and the output shaft 1, and the connecting sleeve 7 and the lower box body 3 form a sealing cavity that can be used to arrange the skeleton oil seal 5 and achieve sealing; therefore, the wind power reducer with maintainable output end seal provided by the embodiment of the present invention has a replaceable output end seal, and the overall structure of the reducer is more compact, low in height, light in weight, and more cost-effective.
[0019] In practical application, such as Figure 1 As shown, when the large tapered bearing 2 and the small tapered bearing 6 are axially preloaded and assembled, the round nut 4 can be screwed so that the round nut 4 can drive the connecting sleeve 7 to generate axial displacement on the output shaft 1 and realize the locking of the tapered bearing.
[0020] In fact, from the perspective of the output end structure of the traditional wind power reducer, the skeleton oil seal can also be moved up to the top of the small tapered bearing, but this will increase the overall height of the reducer. Such an increased height will make it impossible to install the reducer in the cabin and cannot meet the actual use requirements. At the same time, the increase in height will inevitably lead to a significant increase in costs. To solve this problem, this application adopts the following technical solutions: Among them, Figure 1 As shown, the lower housing 3 can be made of alloy steel. Since its mechanical properties are greatly improved, the wall thickness of the lower housing 3 at the bearing installation position can be thinned. Therefore, the models of the large cone bearing 2 and the small cone bearing 6 can be increased, and the bearing capacity is improved, and the gear spacing is greatly reduced, thereby achieving an overall height reduction and cost reduction of the wind power reducer.
[0021] Specifically, Figure 1 As shown, the skeleton oil seal 5 can be arranged above the small tapered bearing 6, which utilizes the spare position of the traditional solution without increasing the height and cost.
[0022] In addition, in terms of lubrication, the parts above the skeleton oil seal of the traditional wind power reducer are all oil lubricated, including the small tapered bearing. However, the actual situation is that the speed of the small tapered bearing is very low, and oil immersion lubrication is an over-design, which will increase the cost without improving the performance of the wind power reducer. The wind power reducer with maintainable output end seal provided by the embodiment of the present invention can realize grease lubrication of the small tapered bearing 6 because the skeleton oil seal 5 is placed on top; in addition, the skeleton oil seal 5 is arranged at a high position, the reducer inner cavity will be reduced, and the amount of lubricating oil will be reduced by 10-15%.
[0023] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A wind power reducer with maintainable output end seal, characterized in that: It comprises: an output shaft, and the output shaft is supported by a large tapered bearing and a small tapered bearing; a connecting sleeve is arranged between the small tapered bearing and the output shaft, and the connecting sleeve and the lower box body form a sealing cavity that can be used to arrange a skeleton oil seal and achieve sealing.
2. The wind power reducer with maintainable output end seal according to claim 1, characterized in that: When the large tapered bearing and the small tapered bearing are axially preloaded and assembled, the round nut is screwed so that the round nut drives the connecting sleeve to generate axial displacement on the output shaft and the tapered bearing is locked.
3. The wind power reducer with maintainable output end seal according to claim 1, characterized in that: The lower box body is made of alloy steel, and the wall thickness of the lower box body is reduced at the bearing installation position.
4. The wind power reducer with maintainable output end seal according to claim 1, characterized in that: The skeleton oil seal is arranged above the small tapered bearing.