Optimized spacer block for main bearing of wind generating set

Abstract

The utility model discloses an optimized spacer block for a main bearing of a wind generating set, which relates to the technical field of wind driven generators and comprises a lower bearing retainer, an inserting groove is arranged at the upper end of the lower bearing retainer, an inserting block is inserted into the inserting groove, an upper bearing retainer is fixed on the surface of the inserting block, and the upper bearing retainer is fixed on the surface of the inserting block. According to the utility model, the impact of the bearing from a non-load area to a load area on the retainers and the impact between the retainers are effectively reduced, so that serious accidents such as breakage of the retainers and the like are prevented; the spacer block is more suitable for the condition that the surface of the raceway is abraded; the structural design considers the rotation characteristic of the roller, so that the spacer block cannot be jammed in a load area due to the abrasion of the raceway, and other retainers cannot be broken; the design of the two side wings enhances the stability of the edge bearing, and the edge bearing can be better attached to the bearing, so that the bearing runs more stably, the risks of jumping and inclining are reduced, and the running safety coefficient of a unit in the bearing abrasion state is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, in particular to an optimized spacer for the main bearing of a wind turbine generator set. Background Technique

[0002] The service life of a wind turbine generator set is about 20 years, and its length mainly depends on the health status of core components such as the main shaft, generator, and gearbox. The main shaft is one of the core components of a wind turbine generator set and plays a crucial role in the transmission chain of the wind turbine. Once the main shaft is damaged, it not only affects the normal operation of the wind turbine, but also the replacement cost is very high, and a large crane is needed. Therefore, the normal operation of the main shaft is an important guarantee for the reliability of the wind turbine.

[0003] The main shaft bearing of a wind turbine is the most critical component of the main shaft. The bearing uses a segmented cage, and the safety of the cage directly affects the life of the bearing. At present, the 16 SKF main shaft bearings in the wind farm have all shown varying degrees of wear, resulting in gaps in the bearing cage. If the gap is too large, the bearing will impact and collide with the cage during the operation of the wind turbine, which may cause the cage to break. If the cage breaks, the bearing will be unstable, seriously affecting the operation safety of the wind turbine. Therefore, an optimized spacer for the main bearing of a wind turbine generator set is proposed to solve the above problems. Content of the Utility Model

[0004] The utility model provides an optimized spacer for the main bearing of a wind turbine generator set, which solves the above technical problems.

[0005] To solve the above technical problems, an optimized spacer for the main bearing of a wind turbine generator set provided by the utility model includes a lower bearing cage. An insertion slot is provided at the upper end of the lower bearing cage. An insertion block is inserted into the inside of the insertion slot. An upper bearing cage is fixed on the surface of the insertion block. A fixing bolt is inserted into the middle of the insertion block. The lower end of the fixing bolt is rotationally connected to the lower bearing cage through a thread.

[0006] Preferably, a sliding groove is provided on the side of the lower bearing cage, and the insertion slot communicates with the sliding groove.

[0007] Preferably, the insertion block is slidably connected to the sliding groove, and the depths of the insertion slot and the sliding groove are equal to half of the height of the lower bearing cage.

[0008] Preferably, a flank is fixed on the side of the upper bearing cage, and the horizontal cross-section of the flank is trapezoidal.

[0009] Compared with the related technology, an optimized spacer for the main bearing of a wind turbine generator set provided by the utility model has the following

[0010] Beneficial effects:

[0011] The utility model effectively reduces the impact of the bearing on the cage from the non-load area to the load area and the impact between cages, thereby preventing serious accidents such as cage fracture; the spacer is more suitable for the case where the raceway surface is worn: the structural design takes into account the rotation characteristics of the rollers, so that the spacer will not jam due to raceway wear in the load area and cause other cages to break; the design of the two side wings enhances the stability of the edge bearings, can better fit the bearings, thereby making the bearings run more stably, reducing the risks of jumping and tilting, and improving the operating safety factor of the unit in the state of bearing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the main structure diagram of the utility model;

[0013] Figure 2 is the top structure diagram of the utility model;

[0014] Figure 3 is the sectional structure diagram of the lower bearing cage of the utility model;

[0015] Figure 4 is the structure diagram of the lower bearing cage of the utility model.

[0016] Reference numerals in the drawings: 1, upper bearing cage; 2, insert block; 3, slot; 4, lower bearing cage; 5, side wing; 6, fixing bolt; 7, chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] An embodiment is given by Figures 1-4 The utility model includes an optimized spacer for the main bearing of a wind turbine generator set, which includes a lower bearing cage 4. A slot 3 is arranged at the upper end of the lower bearing cage 4. An insert block 2 is inserted into the slot 3. An upper bearing cage 1 is fixed on the surface of the insert block 2. A fixing bolt 6 is inserted into the middle of the insert block 2. The lower end of the fixing bolt 6 is rotationally connected to the lower bearing cage 4 by threads.

[0018] A chute 7 is arranged on the side of the lower bearing cage 4, and the slot 3 communicates with the chute 7.

[0019] The insert block 2 is slidably connected to the chute 7, and the depths of the slot 3 and the chute 7 are equal to half of the height of the lower bearing cage 4.

[0020] Side wings 5 are fixed on the sides of the upper bearing cage 1, and the horizontal cross-section of the side wings 5 is trapezoidal.

[0021] Insert the lower bearing cage 4 into the middle of the segmented bearing cage, align the insert block 2 with the slot 3, and then insert the upper bearing cage 1. Then the lower bearing cage 4 and the upper bearing cage 1 are connected. Connect the insert block 2 and the lower bearing cage 4 through the fixing bolt 6. Since the spacer is placed in the middle of the bearing cage, the distance in the middle of the bearing cage is fixed, preventing damage caused by mutual extrusion and deformation of the bearing cages.

Claims

1. An optimized spacer for a main bearing of a wind turbine generator set, comprising a lower bearing retainer (4), characterized in that: The upper end of the lower bearing retainer (4) is provided with a slot (3), an insert block (2) is inserted into the interior of the slot (3), an upper bearing retainer (1) is fixed to the surface of the insert block (2), a fixing bolt (6) is inserted in the middle of the insert block (2), and the lower end of the fixing bolt (6) is rotatably connected to the lower bearing retainer (4) through a thread.

2. The optimized spacer for the main bearing of a wind turbine generator set according to claim 1, characterized in that: A slide groove (7) is provided on the side of the lower bearing retainer (4), and the slot (3) is connected to the slide groove (7).

3. The optimized spacer for the main bearing of a wind turbine generator set according to claim 2, characterized in that: The insert block (2) is slidably connected to the slide groove (7), and the depth of the slot (3) and the slide groove (7) is equal to half the height of the lower bearing retainer (4).

4. The optimized spacer for the main bearing of a wind turbine generator set according to claim 1, characterized in that: A side wing (5) is fixed to the side of the upper bearing retainer (1), and the horizontal cross-section of the side wing (5) is trapezoidal.

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