Impurity protection structure for bearing at output end of wind power speed reducer
The three-layer protective structure blocks impurities into the bearing oil chamber, which solves the problem of easy penetration and impurities in the existing wind power reducer, and achieves efficient protection of the bearing, reduces maintenance costs and improves equipment reliability.
Patent Information
- Application Number
- CN202510670886.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2025-08-15
AI Technical Summary
The existing wind power reducer structural design has the problem that single-layer seal is easily penetrated by fine sand and dust, and oil impurities are easily invaded into the bearing raceway and the coupling degree between the protective device and the reducer body structure is insufficient, resulting in frequent bearing failures and increasing maintenance costs and power generation losses.
A three-layer protective structure is adopted, including a protective baffle, annular flow guide groove, first and second filter mesh, a magnetic screw plug and a magnetic adsorption unit, which are respectively used to block large, small and micro impurities, forming a multi-layer protection to prevent impurities from entering the bearing oil cavity.
Effectively block impurities into the bearing oil cavity, reduce bearing wear, reduce maintenance costs, and improve transmission efficiency and equipment reliability.
Smart Images
Figure CN120487854A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of wind power generation equipment, and in particular to a bearing impurity protection structure at the output end of a wind power reducer, particularly a bearing protection structure for blocking and collecting impurities such as metal grinding chips and carbonized lubricant particles, which is suitable for the transmission system of a megawatt-class wind turbine generator set. Background Art
[0002] At present, with the rapid growth of global energy demand, the demand for renewable energy is also increasing. Among them, wind power generation, as a renewable energy technology that can replace traditional energy, not only has multiple advantages such as environmental protection, economy and sustainability, but also uses airflow to generate electricity, which is more economical than using traditional fuels. It has been widely used and promoted around the world.
[0003] Specifically, as the core transmission component of a wind turbine generator set, wind power reducers will lead to increased friction loss and decreased transmission efficiency if the bearings are not adequately protected. In addition, bearing failure may cause the entire wind turbine generator set to shut down or even trigger a chain reaction, thereby increasing maintenance costs and causing power generation losses.
[0004] Furthermore, according to relevant statistics, approximately 68% of wind turbine bearing failures are directly related to impurity intrusion, resulting in an average annual maintenance cost increase of 15%-20%. The inventors of this application have discovered that the existing wind turbine reducer structural design has the following main defects: (1) Single-layer sealing structures are easily penetrated by fine sand and dust (especially in desert / coastal wind farms); (2) Oil impurities can easily invade the bearing raceway through the lubrication system. These impurities entering the bearing raceway will cause secondary wear; (3) The coupling between the protective device and the reducer body structure is insufficient, and gaps are easily generated under vibration conditions. Summary of the Invention
[0005] The object of the present invention is to provide an impurity protection structure for a bearing at the output end of a wind power reducer, which can effectively and reliably prevent impurities from entering the oil cavity of the bearing through three layers of protection.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A wind power reducer output end bearing impurity protection structure includes: a first-level protection, wherein a protective baffle is press-fitted to a planetary carrier, and a lower box body is provided with an annular guide groove, and a gap is provided between the planetary carrier and the lower box body; Secondary protection, wherein a through hole is provided in the secondary protection, and a first filter is installed at the through hole, so that the oil initially blocked by the primary protection flows through the through hole of the secondary protection; Level 3 protection: a second filter is provided in the level 3 protection, and the second filter is located downstream of the first filter. At the same time, a magnetic plug and a magnetic adsorption unit are provided in the level 3 protection.
[0007] In actual application, the lower box body is provided with an annular guide groove with an inclination angle of 45°, and the gap between the planet carrier and the lower box body is 1 mm.
[0008] The through holes are φ18 through holes and three of them are evenly distributed in the same plane.
[0009] Specifically, the first filter screen is a 50 μm filter screen; the second filter screen is a 10 μm filter screen, and four second filter screens are evenly distributed along the circumferential direction.
[0010] Furthermore, three magnetic screw plugs are evenly spaced in the same plane.
[0011] Compared with the prior art, the wind turbine reducer output end bearing impurity protection structure of the present invention has the following advantages: In the impurity protection structure of the output end bearing of the wind power reducer provided by the present invention, since the protective baffle in the first-level protection is pressed onto the planetary carrier, and the lower box body is provided with an annular guide groove, and there is a gap between the planetary carrier and the lower box body, the protective baffle can effectively prevent the oil containing impurities from directly entering the oil chamber of the output end bearing, and an oil film is formed at the gap when the gearbox is running, so that large particles of impurities can be further effectively blocked by the oil film; a through hole is provided in the second-level protection, and a first filter is installed at the through hole. The oil that is preliminarily blocked by the first-level protection flows through the through hole of the second-level protection, so the small particles of impurities in the oil can be effectively blocked by the first filter; a second filter is provided in the third-level protection, and the second filter is located downstream of the first filter. At the same time, a magnetic plug and a magnetic adsorption unit are provided in the third-level protection. Therefore, the second filter can effectively prevent tiny impurities in the oil from entering the oil chamber, and the magnetic plug and the magnetic adsorption unit can effectively adsorb impurities in the oil. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A schematic diagram of the structure of the impurity protection structure of the output end bearing of a wind power reducer provided by an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the enlarged structure of area A in the middle.
[0013] Reference numerals: 1-Lower housing; 2-Output end bearing; 3-Magnetic adsorption unit; 4-First filter; 5-Magnetic plug; 6-Planet carrier; 7-Protective baffle; 8-Second filter. DETAILED DESCRIPTION
[0014] For ease of understanding, the wind turbine reducer output end bearing impurity protection structure provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.
[0015] The embodiment of the present invention provides a wind power reducer output end bearing impurity protection structure, such as Figure 1 and Figure 2 As shown, it includes: a first-level protection, in which the protective baffle 7 is pressed onto the planetary carrier 6, and the lower box body 1 is provided with an annular guide groove, and there is a gap between the planetary carrier 6 and the lower box body 1; Secondary protection, wherein a through hole is provided in the secondary protection, and a first filter 4 is installed at the through hole, and the oil that is initially blocked by the first-level protection flows through the through hole of the secondary protection; The third-level protection includes a second filter screen 8 , which is located downstream of the first filter screen 4 . Furthermore, the third-level protection includes a magnetic plug 5 and a magnetic adsorption unit 3 .
[0016] Compared with the prior art, the wind turbine reducer output end bearing impurity protection structure described in the embodiment of the present invention has the following advantages: In the impurity protection structure for the output bearing of the wind power reducer provided by an embodiment of the present invention, since the protective baffle 7 in the first-level protection is pressed onto the planetary carrier 6, and the lower box body 1 is provided with an annular guide groove, and there is a gap between the planetary carrier 6 and the lower box body 1, the protective baffle 7 can effectively prevent the oil containing impurities from directly entering the oil chamber of the output end bearing 2, and an oil film is formed at the gap when the gearbox is running, so that large particles of impurities can be further effectively blocked by the oil film; a through hole is provided in the second-level protection, and a first filter 4 is installed at the through hole. The oil that is preliminarily blocked by the first-level protection flows through the through hole of the second-level protection, so that the small particles of impurities in the oil can be effectively blocked by the first filter 4; a second filter 8 is provided in the third-level protection, and the second filter 8 is located downstream of the first filter 4. At the same time, a magnetic plug 5 and a magnetic adsorption unit 3 are provided in the third-level protection, so that the second filter 8 can effectively block tiny impurities in the oil from entering the oil chamber, and the magnetic plug 5 and the magnetic adsorption unit 3 can effectively adsorb impurities in the oil.
[0017] In practical applications, the lower housing 1 may preferably be provided with an annular guide groove with an inclination angle of 45°, and the gap between the planet carrier 6 and the lower housing 1 may preferably be 1 mm.
[0018] The above-mentioned through holes can preferably be φ18 through holes and three of them are evenly distributed in the same plane.
[0019] Specifically, the first filter screen 4 may preferably be a 50 μm filter screen; the second filter screen 8 may preferably be a 10 μm filter screen, and four second filter screens 8 are evenly distributed along the circumferential direction.
[0020] Furthermore, the magnetic screw plugs 5 may preferably be three evenly spaced in the same plane.
[0021] 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 modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A wind power reducer output end bearing impurity protection structure, characterized in that: include: Level 1 protection, in which the protective baffle is press-fitted to the planetary carrier, and the lower box is provided with an annular guide groove, and a gap is provided between the planetary carrier and the lower box; Secondary protection, wherein a through hole is provided in the secondary protection, and a first filter is installed at the through hole, so that the oil initially blocked by the primary protection flows through the through hole of the secondary protection; Level 3 protection: a second filter is provided in the level 3 protection, and the second filter is located downstream of the first filter. At the same time, a magnetic plug and a magnetic adsorption unit are provided in the level 3 protection.
2. The wind power reducer output end bearing impurity protection structure according to claim 1, characterized in that: The lower box body is provided with an annular guide groove with an inclination angle of 45°, and the gap between the planet carrier and the lower box body is 1 mm.
3. The wind power reducer output end bearing impurity protection structure according to claim 1, characterized in that: The through holes are φ18 through holes and three of them are evenly distributed in the same plane.
4. The wind power reducer output end bearing impurity protection structure according to claim 1 or 3, characterized in that: The first filter screen is a 50 μm filter screen; the second filter screen is a 10 μm filter screen, and four second filter screens are evenly distributed along the circumferential direction.
5. The wind power reducer output end bearing impurity protection structure according to claim 4, characterized in that: There are three magnetic screw plugs evenly distributed in the same plane.