Lightweight yaw speed reducer high-speed end structure capable of preventing bearing from falling off

Abstract

The utility model relates to the technical field of wind power generation equipment, in particular to a light-weight yaw speed reducer high-speed end structure capable of preventing a bearing from falling off. The structure comprises an upper machine body, the upper machine body is provided with a cylindrical machine body, the inner edge of the upper side of the machine body extends to form a first upper mounting plate, the inner edge axially extends to form an axial sun gear hole, and a sun gear is rotationally assembled in the hole through a bearing. A retainer ring groove, an elastic retainer ring and an upper retaining surface are arranged on the inner wall of the axial sun gear hole to axially limit the outer ring of the bearing; the sun gear is provided with a shaft sleeve and a lower blocking face, the inner ring of the bearing is axially limited, and axial positioning of the bearing is achieved. The integrated upper machine body structure is adopted, redundant parts are omitted, light weight is achieved, and the overall dimension is reduced; by arranging the two-way limiting structure of the inner ring and the outer ring of the bearing, the bearing is prevented from falling off and losing efficacy in the yaw state of the fan, the reliability of the high-speed end structure is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a lightweight yaw reducer high-speed end structure to prevent bearing detachment. Background Technology

[0002] Yaw reducers are used in the yaw drive system of wind turbines. Typically, multiple yaw reducers mesh simultaneously with the large gear ring of the slewing bearing to drive the wind turbine nacelle to rotate and adjust for wind conditions. Due to the wind turbine's braking structure and control strategy, the nacelle may experience passive yaw during strong winds, causing the yaw reducers to be dragged in the opposite direction. This results in short-term ultra-high speeds of up to 6000 r / min at the high-speed end of the yaw reducer. Existing yaw reducers use elastic retaining ring positioning bearings at the input end, which rotate with the input shaft. However, these elastic retaining rings have a significant risk of detachment at ultra-high speeds, making their reliability insufficient for demanding applications. Furthermore, existing yaw reducers have structural redundancy at the high-speed end, limiting the reducer's size and weight. Utility Model Content

[0003] To address the technical problems of high risk of bearing detachment and structural redundancy in existing yaw reducers using elastic retaining rings at the input end, this invention provides a lightweight high-speed end structure for yaw reducers that prevents bearing detachment.

[0004] Therefore, the present invention provides the following technical solution:

[0005] A lightweight yaw reducer high-speed end structure for preventing bearing detachment includes an upper body, which includes a cylindrical body. The upper inner edge of the body extends radially inward to form a first upper mounting plate. The inner edge of the first upper mounting plate extends axially inward along the body to form an axial sun gear hole (one-piece molding structure, reducing assembly steps, reducing external dimensions, and reducing overall weight). The sun gear is rotatably mounted in the axial sun gear hole through a bearing.

[0006] The inner wall of the axial sun gear hole is provided with a retaining ring groove, and an elastic retaining ring is installed in the retaining ring groove. The elastic retaining ring is located at the lower end of the outer ring of the bearing, and the inner wall of the axial sun gear hole is located at the upper end of the outer ring of the bearing to form an upper retaining surface. A bushing is fitted on the sun gear, and the bushing is located at the upper end of the inner ring of the bearing. The sun gear is located at the lower end of the inner ring of the bearing to form a lower retaining surface. (The outer ring of the bearing is axially bidirectionally limited by the upper retaining surface and the elastic retaining ring, and the inner ring of the bearing is axially bidirectionally limited by the bushing and the lower retaining surface, which improves the bearing positioning reliability at ultra-high speed and avoids the risk of falling off under reverse drag conditions.)

[0007] Furthermore, the main body of the machine is provided with a vent hole and an oil filling screw plug hole. A vent plug is installed in the vent hole (to balance the air pressure inside and outside the reducer, prevent abnormal pressure rise in the cavity, and extend the service life of internal components). A screw plug is installed in the oil filling screw plug hole (to realize the filling and sealing of lubricating oil, facilitate later maintenance, and ensure the lubrication effect at the high speed end).

[0008] Furthermore, an observation hole is provided on the main body of the machine, and an oil level indicator is installed in the observation hole (to directly observe the lubricating oil level inside the reducer, so as to facilitate timely oil replenishment and avoid wear due to lack of oil). A float ball is installed in the oil level indicator (the float ball rises and falls with the liquid level, improving the accuracy of liquid level observation and reducing observation error).

[0009] Furthermore, the sun gear is provided with a stepped hole and a spline groove in the axial direction (the stepped hole enables the sun gear to be fitted and positioned with the shaft end of the yaw motor, and the spline groove ensures stable power transmission).

[0010] Furthermore, a reinforcing rib is connected between the outer wall of the axial sun gear hole and the inner wall of the fuselage body (to prevent the body from deforming during high-speed operation and to ensure structural stability).

[0011] Furthermore, a second upper mounting plate is formed by radially extending outward from the upper outer edge of the fuselage body, and the upper surface height of the second upper mounting plate is higher than the upper surface height of the first upper mounting plate;

[0012] The lower outer edge of the fuselage body extends radially outward to form a first lower mounting plate, and the outer edge of the first lower mounting plate extends radially outward to form a second lower mounting plate. The lower surface of the second lower mounting plate is lower than the lower surface of the first lower mounting plate (forming a stepped mounting structure, which facilitates docking with external components and improves assembly sealing).

[0013] The first upper mounting plate has a through hole (through the through hole to connect the inner cavity of the upper fuselage to the inner cavity of the yaw motor), and the second upper mounting plate and the second lower mounting plate both have mounting thread holes.

[0014] The outer edge of the second mounting plate forms a limiting ring.

[0015] Furthermore, the second upper mounting plate is provided with an annular groove, and a static sealing ring is installed in the annular groove.

[0016] Furthermore, the outer side of the main body is integrally formed with lifting lugs (to facilitate the hoisting and transportation of the entire reducer, and to meet the needs of on-site assembly and maintenance of the fan).

[0017] Furthermore, the bearing is a deep groove ball bearing.

[0018] Advantages and positive effects of this utility model:

[0019] The upper body adopts an integrated structure, which integrates the axial sun gear hole and mounting plate into the cylindrical body structure, reducing the number of parts, simplifying the assembly process, achieving lightweight structure at high speed, and reducing the size of the reducer and the weight of the whole machine.

[0020] The outer ring of the bearing achieves bidirectional axial positioning through the upper retaining surface of the axial sun gear hole and the elastic retaining ring, while the inner ring of the bearing achieves bidirectional axial positioning through the lower retaining surface of the sun gear and the bushing. The positioning is reliable and the rigidity is strong, which can withstand the impact of ultra-high speed at the input end when the fan is passively yawed. This effectively avoids the problems of axial movement of the bearing and positioning failure and falling off, and greatly improves the operational reliability and service life of the high-speed end.

[0021] The main body of the machine is equipped with a vent plug, an oil filler plug, and an oil level indicator, which can balance the air pressure inside and outside the machine, facilitate the addition of lubricating oil and the observation of the oil level, and improve the convenience of maintenance and the reliability of lubrication of the reducer.

[0022] A reinforcing rib is provided on the outer side of the axial sun gear hole to improve local stiffness and structural strength on the basis of lightweight structure, ensure the stability of the body during high-speed operation and avoid deformation.

[0023] The upper body adopts a stepped mounting plate structure and a limiting ring structure, ensuring accurate assembly positioning and firm connection, and guaranteeing installation coaxiality and sealing.

[0024] Lifting lugs are provided on the outside of the main body of the unit to facilitate hoisting and transportation, and to meet the needs of on-site assembly and maintenance of the wind turbine. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This utility model provides a three-dimensional structure for the high-speed end of a lightweight yaw reducer designed to prevent bearing detachment. Figure 1 .

[0027] Figure 2 This utility model provides a three-dimensional structure for the high-speed end of a lightweight yaw reducer designed to prevent bearing detachment. Figure 2 .

[0028] Figure 3 Cross-sectional view of the high-speed end structure of a lightweight yaw reducer for preventing bearing detachment provided by this utility model. Figure 1 .

[0029] Figure 4Cross-sectional view of the high-speed end structure of a lightweight yaw reducer for preventing bearing detachment provided by this utility model. Figure 2 .

[0030] Figure 5 Cross-sectional view of the high-speed end structure of a lightweight yaw reducer for preventing bearing detachment provided by this utility model. Figure 3 .

[0031] In the diagram: 1. Vent plug; 2. Upper body; 3. Bushing; 4. Sun gear; 5. Plug; 6. Oil level indicator; 7. Main body; 8. First upper mounting plate; 9. Axial sun gear hole; 10. Bearing; 11. Elastic retaining ring; 12. Upper retaining surface; 13. Lower retaining surface; 14. Vent hole; 15. Oil filling plug hole; 16. Inspection hole; 17. Float; 18. Stepped hole; 19. Spline groove; 20. Reinforcing rib; 21. Through hole; 22. Second upper mounting plate; 23. First lower mounting plate; 24. Second lower mounting plate; 25. Limiting ring; 26. Annular groove; 27. Lifting lug. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0033] This utility model provides a lightweight yaw reducer high-speed end structure to prevent bearing detachment, such as... Figure 1-5 As shown, it includes an upper body 2, which includes a cylindrical fuselage body 7. The upper inner edge of the fuselage body 7 extends radially inward to form a first upper mounting plate 8. The inner edge of the first upper mounting plate 8 extends axially inward along the fuselage body 7 to form an axial sun gear hole 9. A sun gear 4 is rotatably mounted in the axial sun gear hole 9 through a bearing 10, which is a deep groove ball bearing.

[0034] like Figure 1 As shown, a retaining ring groove is provided on the inner wall of the axial sun gear hole 9, and an elastic retaining ring 11 is installed in the retaining ring groove. The elastic retaining ring 11 is located at the lower end of the outer ring of the bearing 10, and the inner wall of the axial sun gear hole 9 is located at the upper end of the outer ring of the bearing 10 to form an upper retaining surface 12. A bushing 3 is fitted on the sun gear 4. The bushing 3 is located at the upper end of the inner ring of the bearing 10, and the sun gear 4 is located at the lower end of the inner ring of the bearing 10 to form a lower retaining surface 13.

[0035] A second upper mounting plate 22 is formed by radially extending outward from the upper outer edge of the fuselage body 7. The upper surface height of the second upper mounting plate 22 is higher than the upper surface height of the first upper mounting plate 8. A first lower mounting plate 23 is formed by radially extending outward from the lower outer edge of the fuselage body 7. A second lower mounting plate 24 is formed by radially extending outward from the outer edge of the first lower mounting plate 23. The lower surface height of the second lower mounting plate 24 is lower than the lower surface height of the first lower mounting plate 23. A through hole 21 is provided on the first upper mounting plate 8. A mounting threaded hole is provided on both the second upper mounting plate 22 and the second lower mounting plate 24. A limiting ring 25 is formed on the outer edge of the second lower mounting plate 24. An annular groove 26 is provided on the second upper mounting plate 22, and a static sealing ring is installed in the annular groove 26.

[0036] like Figure 4 As shown, the main body 7 has a vent 14 and an oil filling plug hole 15. A vent plug 1 is installed in the vent 14, and a plug 5 is installed in the oil filling plug hole 15. The main body 7 has an observation hole 16, an oil level indicator 6 is installed in the observation hole 16, and a float ball 17 is installed in the oil level indicator 6. A lifting lug 27 is integrally formed on the outer side of the main body 7.

[0037] The sun gear 4 has a stepped hole 18 and a spline groove 19 axially. A reinforcing rib 20 connects the outer wall of the axial sun gear hole 9 to the inner wall of the fuselage body 7.

[0038] Working principle:

[0039] During installation, the second upper mounting plate 22 is used to fix the yaw motor end cover, and the through hole 21 on the first upper mounting plate 8 connects the inner cavity of the upper body 2 with the inner cavity of the yaw motor. The first lower mounting plate 23 and the second lower mounting plate 24 are used to fix the gearbox housing. The limiting ring 25 on the outer edge of the second lower mounting plate 24 is used to achieve radial coaxial positioning to ensure that there is no misalignment during assembly. The static sealing ring in the annular groove 26 of the second upper mounting plate 22 is pressed between the assembly surfaces of the upper body 2 and the yaw motor. At this time, the inner cavity of the upper body 2 and the inner cavity of the yaw motor together form a closed independent oil cavity. Lubricating oil is injected into the oil cavity through the oil injection plug hole 15 and the oil injection plug hole 15 is sealed by the plug 5.

[0040] This application presents a high-speed end structure without a frame oil seal, requiring the yaw motor to be equipped with an oil seal, which simplifies the structure and reduces manufacturing costs; while existing technologies mostly have a frame oil seal on the high-speed end.

[0041] When the fan is adjusting for normal wind, the yaw drive power is transmitted through the spline groove 19 in the sun gear 4, which drives the sun gear 4 to rotate at high speed, and the bearing 10 in the axial sun gear hole 9 rolls synchronously. The stepped hole 18 inside the sun gear 4 is adapted to the power input shaft, which further improves the coaxiality of the transmission. The reinforcing rib 20 between the axial sun gear hole 9 and the body 7 can strengthen the local rigidity and prevent the body from deforming when operating at high speed.

[0042] During operation, the vent plug 1 in the vent hole 14 balances the air pressure inside and outside the oil chamber; the oil level indicator 6 with float ball 17 can intuitively display the oil level; the oil filling screw plug hole 15 cooperates with the screw plug 5 to realize the rapid filling and sealing of lubricating oil, continuously ensuring the lubrication state of the bearing 10 and reducing wear and loss.

[0043] When the nacelle is passively yawed in strong winds, the gearbox is dragged in the opposite direction. The outer ring of bearing 10 is axially bidirectionally limited by the upper retaining surface 12 and the elastic retaining ring 11, and the inner ring of bearing 10 is axially bidirectionally limited by the bushing 3 and the lower retaining surface 13, so as to avoid the risk of falling off under reverse drag conditions.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lightweight yaw reducer high-speed end structure to prevent bearing detachment, characterized in that, Includes an upper body (2), the upper body (2) includes a cylindrical fuselage body (7), the upper inner edge of the fuselage body (7) extends radially inward to form a first upper mounting plate (8), the inner edge of the first upper mounting plate (8) extends axially inward along the fuselage body (7) to form an axial sun gear hole (9), and a sun gear (4) is rotatably mounted in the axial sun gear hole (9) through a bearing (10); The inner wall of the axial sun gear hole (9) is provided with a retaining ring groove, and an elastic retaining ring (11) is installed in the retaining ring groove. The elastic retaining ring (11) is located at the lower end of the outer ring of the bearing (10), and the inner wall of the axial sun gear hole (9) is located at the upper end of the outer ring of the bearing (10) to form an upper retaining surface (12). A bushing (3) is fitted on the sun gear (4). The bushing (3) is located at the upper end of the inner ring of the bearing (10), and the sun gear (4) is located at the lower end of the inner ring of the bearing (10) to form a lower retaining surface (13).

2. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, The main body (7) is provided with a vent hole (14) and an oil filling screw hole (15). A vent plug (1) is installed in the vent hole (14), and a screw plug (5) is installed in the oil filling screw hole (15).

3. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, An observation hole (16) is provided on the main body (7), an oil level indicator (6) is installed in the observation hole (16), and a float ball (17) is provided in the oil level indicator (6).

4. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, The sun gear (4) is provided with a stepped hole (18) and a spline groove (19) in the inner axial direction.

5. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, A reinforcing rib (20) is connected between the outer wall of the axial sun gear hole (9) and the inner wall of the fuselage body (7).

6. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, The upper outer edge of the fuselage body (7) extends radially outward to form a second upper mounting plate (22), and the upper surface height of the second upper mounting plate (22) is higher than the upper surface height of the first upper mounting plate (8); The lower outer edge of the fuselage body (7) extends radially outward to form a first lower mounting plate (23), and the outer edge of the first lower mounting plate (23) extends radially outward to form a second lower mounting plate (24). The lower surface height of the second lower mounting plate (24) is lower than the lower surface height of the first lower mounting plate (23). The first upper mounting plate (8) has a through hole (21), and the second upper mounting plate (22) and the second lower mounting plate (24) both have mounting thread holes; A limiting ring (25) is formed on the outer edge of the second lower mounting plate (24).

7. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 6, characterized in that, The second upper mounting plate (22) is provided with an annular groove (26), and a static sealing ring is installed in the annular groove (26).

8. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, The fuselage body (7) is integrally formed with a lifting lug (27) on the outside.

9. The lightweight yaw reducer high-speed end structure for preventing bearing detachment according to claim 1, characterized in that, The bearing (10) is a deep groove ball bearing.

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