Main shaft check ring rotation stopping structure and wind turbine generator

Abstract

The utility model discloses a main shaft check ring rotation stopping structure and a wind turbine generator set, a check ring is arranged on the outer side of a main shaft in a sleeving mode, and the peripheral face of the check ring makes contact with the peripheral face of the main shaft. The contour line of the cross section of the contact face of the main shaft and the check ring comprises at least one linear section, and rotation stopping of the main shaft and the check ring is achieved through normal force and friction force generated by plane contact formed by the linear sections. Relative deformation of the main shaft and the check ring can be effectively avoided, the check ring is prevented from running, and the risk of abrasion of the main shaft is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine generator sets, and in particular to a main shaft retaining ring anti-rotation structure and a wind turbine generator set. Background Technology

[0002] As wind turbine generators become larger, higher demands are placed on key components such as the main shaft and retaining rings. Under external loads, the main shaft and retaining rings undergo greater deformation, and the uneven deformation of the two components leads to relative creep. Over time, the retaining rings may run off-center, causing wear on the main shaft. This reduces the main shaft's load-bearing capacity and service life. Severely worn main shafts may lead to unstable operation of the unit or even serious failures such as breakage, endangering the safety of the entire wind turbine generator and posing a significant safety hazard. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a main shaft retaining ring anti-rotation structure and wind turbine generator, which can effectively avoid the relative deformation of the main shaft and the retaining ring, prevent the retaining ring from running off, and reduce the risk of main shaft wear.

[0004] The objective of this utility model can be achieved by adopting the following technical solutions:

[0005] A spindle retaining ring anti-rotation structure is provided, wherein the retaining ring is sleeved on the outside of the spindle, and the outer peripheral surface of the retaining ring is in contact with the outer peripheral surface of the spindle; the cross-sectional profile of the contact surface between the spindle and the retaining ring includes at least one straight segment, and the normal force and friction generated by the planar contact formed by the straight segment achieve anti-rotation of both.

[0006] Furthermore, the transition area between the straight line segment and the adjacent arc segment or the adjacent straight line segment is provided with a fillet R.

[0007] Furthermore, the fillet radius R is ≥ 25mm.

[0008] Furthermore, the length of the arc segment is 60% to 70% of the total circumference of the corresponding circle.

[0009] Furthermore, the cross-sectional profile of the outer peripheral surface of the spindle and the cross-sectional profile of the inner peripheral surface of the retaining ring are both regular polygonal structures.

[0010] A wind turbine generator set includes the aforementioned main shaft retaining ring anti-rotation structure.

[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0012] This utility model has a simple structure, is easy to process, convenient to install, and low cost. It only requires simple structural improvements to the main shaft and retaining ring, which can effectively reduce the deformation, creep, and ring slippage of the main shaft and retaining ring, reduce the safety hazards of the main shaft, extend the service life of the main shaft, and improve the operational reliability and economy of the wind turbine. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation of the spindle and retaining ring.

[0014] Figure 2 This is a schematic diagram of the anti-rotation structure in Example 1.

[0015] Figure 3 for Figure 2 A magnified view of a section at point B in the middle.

[0016] Figure 4 This is a schematic diagram of the anti-rotation structure in Example 2. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0018] Example 1:

[0019] like Figures 1 to 3 As shown, this embodiment provides a spindle retaining ring anti-rotation structure. The retaining ring 2 is sleeved on the outside of the spindle 1, and the outer peripheral surface of the retaining ring 2 is in contact with the outer peripheral surface of the spindle 1. The cross-sectional profile of the contact surface between the spindle 1 and the retaining ring 2 includes at least one straight segment 3, that is, a composite structure of straight segment + arc segment is adopted. The length of the arc segment 4 is 60% to 70% of the total length of the corresponding circumference. The anti-rotation of both is achieved by the normal force and friction generated by the planar contact formed by the straight segment.

[0020] The transition area between a straight line segment and an adjacent arc segment or an adjacent straight line segment is provided with a fillet R, where the fillet R is ≥ 25mm.

[0021] This embodiment can be processed by following the steps of rough machining → heat treatment → precision turning of the circular datum → CNC milling of the straight segment. The process is simple, the processing time is short, and the installation accuracy requirements are low.

[0022] Example 2:

[0023] like Figure 4As shown, the difference between this embodiment and embodiment 1 is that the cross-sectional outline of the outer circumferential surface of the spindle and the cross-sectional outline of the inner circumferential surface of the retaining ring are both regular polygonal structures 5, such as 16-sided polygons. By transforming the circumferential contact surface into a polygonal geometric constraint, the relative rotation of the two is prevented through the interlocking of geometric shapes, thus achieving anti-rotation.

[0024] Example 3:

[0025] This embodiment provides a wind turbine generator set, including the main shaft retaining ring anti-rotation structure described in Embodiment 1 or Embodiment 2.

[0026] The above description is only a preferred embodiment of this utility model patent, but the protection scope of this utility model patent is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed in this utility model patent, based on the technical solution and utility model patent concept of this utility model patent, shall fall within the protection scope of this utility model patent.

Claims

1. A spindle retaining ring anti-rotation structure, wherein the retaining ring is sleeved on the outside of the spindle, and the outer peripheral surface of the retaining ring is in contact with the outer peripheral surface of the spindle; characterized in that: The cross-sectional profile of the contact surface between the main shaft and the retaining ring includes at least one straight segment. The normal force and friction generated by the planar contact formed by the straight segment prevent the rotation of both shafts from rotating.

2. The spindle retaining ring anti-rotation structure according to claim 1, characterized in that: The transition area between the straight line segment and the adjacent arc segment or the adjacent straight line segment is provided with a fillet R.

3. The spindle retaining ring anti-rotation structure according to claim 2, characterized in that: The fillet radius R is ≥ 25mm.

4. The spindle retaining ring anti-rotation structure according to claim 2, characterized in that: The length of the arc segment is 60% to 70% of the total circumference of the corresponding circle.

5. The spindle retaining ring anti-rotation structure according to claim 1, characterized in that: The cross-sectional profile of the outer peripheral surface of the spindle and the cross-sectional profile of the inner peripheral surface of the retaining ring are both regular polygonal structures.

6. A wind turbine generator set, characterized in that, Includes the spindle retaining ring anti-rotation structure as described in any one of claims 1 to 5.

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