Wind power gear box and wind generating set
By installing bushings, limiting rings, and snap rings on the protruding part of the pin, an axial constraint fit is formed, which solves the problem of easy displacement of the pin and improves the stability and connection stability of the wind turbine gearbox and wind turbine generator set.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-06
- Publication Date
- 2026-03-27
AI Technical Summary
The pins of wind turbine gearboxes are prone to axial displacement, which affects the connection stability between the gearbox and the wind turbine casing and generator casing.
A bushing, a limiting ring, and a snap ring are fitted onto the protruding part of the pin to form an axial constraint fit. By utilizing the dual mechanism of mechanical limiting and clearance control, the structural strength of the pin is enhanced and the axial clearance is filled, ensuring the axial locking of the pin and the torque arm.
It effectively suppresses the axial displacement of the pin shaft, improves the stability of the wind turbine gearbox and wind turbine generator set, ensures the stable connection between the wind turbine gearbox and the wind turbine casing and generator casing, and achieves stable operation.
Smart Images
Figure CN224049655U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of wind power technology, concretely relates to wind power gear box and wind generating set. BACKGROUND
[0002] In the wind generating set, the gear box is connected between the fan and the generator to realize the transmission between the fan and the generator. The box body of the wind power gear box is provided with a torque arm with an axial hole, and the gear box is connected with the fan shell and the generator shell through a pin shaft arranged in the axial hole.
[0003] During the operation of the wind generating set, the pin shaft is prone to axial displacement due to the unbalanced force from the fan side and the generator side, which affects the connection stability of the gear box with the fan shell and the generator shell.
[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. UTILITY MODEL CONTENT
[0005] Therefore, the utility model provides a wind power gear box and a wind generating set to solve the technical problem that the pin shaft of the torque arm is prone to axial displacement, which further affects the stability of the wind power gear box and the wind generating set.
[0006] According to one aspect of the utility model, a wind power gear box is provided, the box body of the wind power gear box is provided with a torque arm with an axial hole, a pin shaft is arranged in the axial hole, and the two ends of the pin shaft extend out of the axial hole to form an extension part; each extension part is provided with: a bushing sleeved on the extension part; a limiting ring sleeved on the extension part and located on one side of the bushing close to the torque arm; a circlip sleeved on the extension part and located on the other side of the bushing; wherein the torque arm, the limiting ring, the bushing and the circlip form an axial constraint fit.
[0007] In some embodiments, the torque arm, the limiting ring, the bushing and the circlip are axially compressed.
[0008] In some embodiments, the torque arm, the limiting ring, the bushing and the circlip are axially gap fitted.
[0009] In some embodiments, the circlip is a ring-shaped circlip with a square cross section, and / or the limiting ring is a ring-shaped washer with a square cross section.
[0010] In some embodiments, the bushing includes a plurality of steel rings sleeved and stacked, and an elastic interlayer is arranged between every two adjacent steel rings.
[0011] In some embodiments, the inner wall of the bushing is provided with a spiral groove, and the spiral groove is in a structure of gradually deepening from one end close to the torque arm to the other end away from the torque arm.
[0012] In some embodiments, a damping material is embedded in part of the channel of the spiral groove.
[0013] In some embodiments, the wind power gear box further comprises a gasket arranged between the bushing and the snap spring.
[0014] In some embodiments, the materials of the bushing and the limiting ring are alloy steel, and the material of the snap spring is spring steel.
[0015] According to another aspect of the present application, a wind turbine generator is provided, which is configured with the wind power gear box according to any of the above embodiments.
[0016] The present application has at least the following beneficial effects compared with the prior art:
[0017] The present application uses the axial constraint cooperation of the snap spring, the bushing and the limiting ring sleeved on the protruding part of the pin shaft, and uses the double mechanism of mechanical limiting and gap control to effectively inhibit the axial displacement of the pin shaft and improve the stability of the wind power gear box and the wind turbine generator.
[0018] The bushing is sleeved on the protruding part to enhance the structural strength of the pin shaft and cover most of the axial area of the protruding part; the limiting ring and the snap spring are arranged on the two sides of the bushing respectively, the limiting ring fills the axial gap between the bushing and the torque arm, and the snap spring presses the bushing and the limiting ring against the torque arm to realize the stable structure of the axial constraint of the torque arm, the limiting ring, the bushing and the snap spring, effectively overcome the problem that the pin shaft is easily axially displaced due to the unbalanced force of the fan side and the generator side during the operation of the wind turbine generator, so that the pin shaft always maintains the axial locking with the torque arm, ensures the stable connection of the wind power gear box with the fan housing and the generator housing, and further ensures the stable operation of the wind power gear box and the wind turbine generator.
[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS
[0020] The drawings incorporated into the specification and forming a part thereof, show embodiments consistent with the present application, and together with the specification serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0021] Figure 1 Fig. 1 shows a schematic diagram of the cooperation structure between the torque arm and the pin shaft of the wind power gear box according to an embodiment of the present application.
[0022] Figure 2 Fig. 1 shows a schematic diagram of the cooperation structure between the torque arm and the pin shaft of the wind power gear box according to an embodiment of the present application. DETAILED DESCRIPTION
[0023] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein. Rather, these implementations are provided as non-limiting examples, so that this disclosure will fully convey the scope of the application to those skilled in the art.
[0024] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:
[0025] The terms "first", "second", and similar terms do not denote any order, quantity, or importance, but are used to distinguish one element from another, and the terms "axial", "radial", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are used only to facilitate the description of the application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, in the description of the application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements.
[0026] It should be noted that the features of the embodiments of the present application and the features in different embodiments can be combined with each other without conflict.
[0027] Figure 1 Fig. 1 shows a schematic diagram of the cooperation structure between the torque arm and the pin shaft of the wind power gear box according to an embodiment of the present application. Figure 1 As shown in Fig. 1, the box body of the wind power gear box provided by the present application is provided with a torque arm 100 with an axle hole 110, a pin shaft 200 is arranged in the axle hole 110, and the two ends of the pin shaft 200 extend out of the axle hole 110 to form an extension part 220. Each extension part 220 is provided with:
[0028] a bushing 300 sleeved on the extension part 220;
[0029] The limiting ring 400 is sleeved on the extending part 220 and located on one side of the bushing 300 close to the torque arm 100.
[0030] The snap spring 500 is sleeved on the extending part 220 and located on the other side of the bushing 300.
[0031] The torque arm 100, the limiting ring 400, the bushing 300 and the snap spring 500 form axial constraint cooperation.
[0032] The utility model discloses a snap spring 500, bushing 300 and limiting ring 400 are sleeved on the extending part 220 of pin shaft 200 and form axial constraint cooperation with torque arm 100, utilize the double mechanism of mechanical positioner and clearance control, effectively restrain the axial displacement of pin shaft 200, promote the stability of wind power gear box and wind generating set.
[0033] The bushing 300 is sleeved on the extending part 220 and plays the role of enhancing the structural strength of the pin shaft 200 and covering most of the axial area of the extending part 220; the limiting ring 400 and the snap spring 500 are arranged on the two sides of the bushing 300 respectively, the limiting ring 400 fills the axial gap between the bushing 300 and the torque arm 100, and the snap spring 500 presses the bushing 300 and the limiting ring 400 against the torque arm 100, so that the torque arm 100, the limiting ring 400, the bushing 300 and the snap spring 500 form a stable structure constrained in the axial direction, the problem that the pin shaft 200 is prone to axial displacement due to unbalanced force from the fan side and the generator side during the operation of the wind generating set is effectively overcome, the pin shaft 200 always keeps axial locking with the torque arm 100, the stable connection of the wind power gear box and the fan shell and the generator shell is ensured, and then the stable operation of the wind power gear box and the wind generating set is ensured.
[0034] The axial constraint cooperation between the torque arm 100, the limiting ring 400, the bushing 300 and the snap spring 500 can be axial pressing or axial gap cooperation. The axial pressing refers to zero gap or even negative gap cooperation between the torque arm 100, the limiting ring 400, the bushing 300 and the snap spring 500, and there is pre-tightening force between them, so that the axial displacement of the pin shaft 200 can be completely limited. The axial gap cooperation refers to that there is a small amount of axial gap, for example, a micron or even nanometer level gap, between the torque arm 100, the limiting ring 400, the bushing 300 and the snap spring 500, so that the axial movement of the pin shaft 200 is limited. In specific application, the torque arm 100, the limiting ring 400, the bushing 300 and the snap spring 500 can adopt the constraint cooperation mode of axial pressing, or the constraint cooperation mode of axial small gap cooperation if it is difficult to realize technically.
[0035] In some embodiments, the retaining ring 500 may be formed as an annular retaining ring with a square cross-section, and / or the limiting ring 400 may also be formed as an annular washer with a square cross-section. Thus, by utilizing the axial constraint cooperation between the retaining ring 500, the bushing 300, and the limiting ring 400 and the torque arm 100, the axial displacement of the pin 200 can be effectively suppressed, thereby improving the stability of the wind turbine gearbox and wind turbine generator set.
[0036] Figure 2 This illustration shows the mating structure of the bushing, pin, and snap ring of the wind turbine gearbox in an embodiment of the present invention. Figure 1 and Figure 2 As shown, in some embodiments, the bushing 300 includes multiple nested steel rings 300a, with an elastic interlayer 300b provided between every two adjacent steel rings 300a. The steel rings 300a provide rigid support; the elastic interlayer 300b enhances damping performance; and the combination of the steel rings 300a and the elastic interlayer 300b effectively improves the axial constraint performance on the pin 200, thereby enhancing reliability.
[0037] In some embodiments, combined with Figure 1 and Figure 2 As shown, the wind turbine gearbox also includes a gasket 600, disposed between the bushing 300 and the retaining ring 500. The gasket 600 further eliminates the gap between the bushing 300 and the retaining ring 500, minimizing the axial clearance of the axial locking structure formed by the axial constraint fit between the torque arm 100, the limiting ring 400, the bushing 300, the gasket 600, and the retaining ring 500. This achieves axial limiting of the pin 200, ensuring the stability of the wind turbine gearbox and the wind turbine generator set.
[0038] Furthermore, referring to Figure 1 As shown, in some embodiments, the inner wall of the bushing 300 may also be provided with a spiral groove, and the spiral groove has a gradually deepening structure from the first end 310 near the torque arm 100 to the second end 320 away from the torque arm 100. The inner wall of the bushing 300 is pressed against the protrusion 220 of the pin 200 through the spiral groove. The spiral groove as a whole forms a progressive structure with a gradually changing groove depth. The spiral groove at the first end 310 of the bushing 300 is shallower, and the interference clamping force between it and the protrusion 220 is relatively small, which facilitates the assembly of the bushing 300 to the protrusion 220. The spiral groove at the second end 320 of the bushing 300 is deeper, and the interference clamping force between it and the protrusion 220 is relatively larger, which can effectively suppress displacement impact from the wind turbine side / generator side and ensure the stability of the axial position.
[0039] Further, in some embodiments, a damping material is embedded in the partial channel of the helical groove. The damping material is, for example, an elastic material, in particular rubber, but is not limited thereto. By embedding the damping material in the partial channel, mechanical vibration energy can be absorbed, and the stability of the cooperation between the bushing 300 and the protruding portion 220 of the pin shaft 200 can be improved.
[0040] In the above embodiments, the materials of the bushing 300 and the limiting ring 400 can be alloy steel, and the material of the clasp spring 500 can be spring steel, so as to effectively cope with the environment and working conditions applied to the wind turbine gearbox, improve the mechanical strength and fatigue resistance of the components, and achieve wear resistance and corrosion resistance. According to different design requirements, the materials of the components can also be adjusted as needed. For example, the material of the clasp spring 500 and other components can also be selected as stainless steel, so as to be more suitable for offshore wind power environment, improve corrosion resistance, and prolong service life.
[0041] The utility model embodiment further provides a wind turbine generator unit, the wind turbine generator unit is provided with the wind turbine gearbox as described in any of the above embodiments, can pass through the clasp spring 500, the bushing 300 and the limiting ring 400 of the protruding portion 220 of the pin shaft 200 and the axial constraint cooperation of torque arm 100, utilize the double mechanism of mechanical limiting and clearance control, effectively restrain the axial displacement of pin shaft 200, improve the stability of wind turbine gearbox and wind turbine generator unit.
[0042] The above is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the utility model.
Claims
1. A wind power gear box, a box body of the wind power gear box is provided with a torque arm with an axle hole, a pin shaft is arranged in the axle hole, both ends of the pin shaft extend out of the axle hole to form an extension part; characterized in that Each of the extension parts is provided with: a bushing sleeved on the extension part; a limiting ring sleeved on the extension part and located on one side of the bushing close to the torque arm; a snap spring sleeved on the extension part and located on the other side of the bushing; wherein the torque arm, the limiting ring, the bushing and the snap spring form an axial constraint fit.
2. A wind turbine gearbox according to claim 1, characterised in that The torque arm, the limiting ring, the bushing and the snap spring are axially compressed.
3. The wind turbine gearbox of claim 1, wherein, The torque arm, the limiting ring, the bushing and the snap spring are axially gap fitted.
4. The wind turbine gearbox of claim 1, wherein, The snap spring is a ring-shaped snap spring and the cross section is square, and / or the limiting ring is a ring-shaped washer and the cross section is square.
5. The wind turbine gearbox of claim 1, wherein, The bushing comprises a plurality of steel rings sleeved and stacked, and an elastic interlayer is arranged between each two adjacent steel rings.
6. The wind turbine gearbox of claim 1, wherein, An inner wall of the bushing is provided with a spiral groove, and the spiral groove has a gradually deepening structure from one end close to the torque arm to one end away from the torque arm.
7. A wind turbine gearbox according to claim 6, wherein A damping material is embedded in part of the channel of the spiral groove.
8. The wind turbine gearbox of claim 1, wherein, Further comprising: a gasket arranged between the bushing and the snap spring.
9. A wind turbine gearbox according to any of claims 1-8, characterised in that The materials of the bushing and the limiting ring are alloy steel, and the material of the snap spring is spring steel.
10. A wind power unit, characterized in that The wind turbine generator is configured with the wind power gear box according to any one of claims 1-9.