Bearing pressing device for main shaft assembly of wind power generator

Abstract

The utility model discloses a bearing pressing device for a main shaft assembly of a wind power generator. The bearing pressing device comprises a jacking module, a connecting assembly and a pressing support sleeved on a main shaft. The multiple jacking modules apply pressure to the pressing support more evenly in the circumferential direction, and it is guaranteed that the pressing force of the bearing can be continuously kept at a required constant value. The vertical ring plate is connected between the surface ring plate and the supporting ring plate; reinforcing ribs connected with the supporting ring plate, the vertical ring plate and the face ring plate at the same time are arranged among the supporting ring plate, the vertical ring plate and the face ring plate, the hardness of the whole pressing support can be greatly improved, deformation of the pressing support is avoided, and the service life is long. The supporting annular plate makes contact with the upper end face of the bearing through the annular pressing strip, the annular pressing strip is located under the vertical annular plate, when the jacking module presses the bearing downwards, counter-acting force given by the bearing can be transmitted to the annular pressing strip firstly, meanwhile, most of the counter-acting force received by the annular pressing strip can be absorbed by the vertical annular plate, and therefore deformation of the supporting annular plate can be further avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generator assembly, in particular to a bearing clamping device for a main shaft assembly of a wind turbine generator. Background Art

[0002] The main shaft assembly bearings of wind turbines need to be tightened during assembly to ensure that the bearings and retaining rings fit tightly. The fit is required to be more than 95%, and the gap at the non-fitting part is required to be 0.03 to 0.08 mm.

[0003] The traditional method of clamping bearings is generally to use large clamping nuts on the spindle assembly structure for clamping. With the continuous changes in machine models, the diameters of spindle bearings of various models developed by the company range from 1m to 3m. The maximum clamping force required for the installation of large bearings is more than 220 tons, and the pressure must be maintained for more than 2 hours. The pressure can only be released after the fit and clearance between the bearing and the front retaining ring meet the requirements.

[0004] If the bearing with a shaft diameter of 3 meters is equipped with a clamping nut structure, it will be difficult to process, and it will be inconvenient to install and maintain; or if a bolt + nut structure is used to apply a pre-tightening force to the bearing to tighten it, the construction workers need to continuously apply tightening torque to the bolts to ensure that the clamping force on the bearing meets the technical requirements. This cannot ensure that the clamping force of the bearing can be continuously maintained at the required fixed value, resulting in high labor intensity for the operators.

[0005] At present, although there are also methods of clamping the bearing by means of a pressing piece and a jack to ensure that the clamping force of the bearing can be continuously maintained at the required constant value, the pressing piece used is a hollow structure. When the bottom surface of the pressing piece is directly in contact with the upper end surface of the bearing and the jack applies pressure to the pressing piece at the top of the pressing piece, the pressing piece is prone to deformation, thereby shortening the service life of the pressing piece. Summary of the invention

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a bearing clamping device for a main shaft assembly of a wind turbine generator, which can not only ensure that the clamping force of the bearing can be continuously maintained at a required constant value, but also is not prone to deformation and has a long service life.

[0007] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0008] A bearing clamping device for a main shaft assembly of a wind turbine generator,

[0009] It includes a lifting module, a connecting assembly, and a clamping bracket sleeved on the main shaft;

[0010] The clamping bracket is in a circular ring shape, including a supporting ring plate, a vertical ring plate, and a surface ring plate;

[0011] The face ring plate and the support ring plate are arranged in parallel;

[0012] The vertical ring plate is connected between the surface ring plate and the support ring plate;

[0013] Between the support ring plate, the vertical ring plate and the surface ring plate, there are reinforcing ribs connected to the three at the same time;

[0014] The lifting modules are evenly arranged on the supporting ring plate through corresponding connecting components, and the distance between the lifting modules and the protrusion at the bottom of the main shaft is fixed through the corresponding connecting components.

[0015] Compared with the compression piece with a hollow structure, in the present technical solution, the vertical ring plate is connected between the surface ring plate and the support ring plate; reinforcing ribs connected to the support ring plate, the vertical ring plate and the surface ring plate are provided between the three, which can greatly improve the hardness of the entire clamping bracket, avoid deformation of the clamping bracket, and prolong the service life.

[0016] Furthermore, an annular strip is provided at the bottom of the supporting ring plate, and the annular strip is located directly below the vertical ring plate.

[0017] Relative to the bottom surface of the pressure piece (equivalent to the support ring plate of the present technical solution) directly fitting with the upper end surface of the bearing, in the present technical solution, the support ring plate contacts the upper end surface of the bearing through an annular pressure strip, and the annular pressure strip is located directly below the vertical ring plate. When the lifting module presses down the bearing, the reaction force given by the bearing will first be transmitted to the annular pressure strip. At the same time, most of the reaction force received by the annular pressure strip will be absorbed by the vertical ring plate, thereby further avoiding deformation of the support ring plate.

[0018] Furthermore, the reinforcing ribs are evenly arranged along the circumferential direction of the supporting ring plate.

[0019] Furthermore, reinforcing ribs are arranged on both sides of the jacking module.

[0020] Furthermore, the connecting assembly includes a connecting rod, one end of which is connected to the protrusion at the bottom of the main shaft, and the other end of which is connected to the lifting module.

[0021] Further, the jacking module is a hollow jack;

[0022] The connection assembly also includes a first anchor;

[0023] The connecting rod passes through the hollow jack;

[0024] The hollow jack is connected to the connecting rod through a first anchor, and the distance between the hollow jack and the protrusion at the bottom of the main shaft is fixed under the cooperation of the first anchor and the connecting rod.

[0025] Furthermore, the connection assembly also includes a second anchor;

[0026] The connecting rod passes through the protruding portion at the bottom of the main shaft and is connected to the second anchor.

[0027] Furthermore, the first anchor is a cone anchor.

[0028] Furthermore, the second anchor is a flat anchor.

[0029] Furthermore, a pump station is also included, and the pump station is connected to a plurality of hollow jacks through a plurality of oil pipes.

[0030] Compared with the prior art, the principles and advantages of this technical solution are as follows:

[0031] 1. Compared with the compression piece with a hollow structure, in the present technical solution, the vertical ring plate is connected between the surface ring plate and the support ring plate; reinforcing ribs connected to the support ring plate, the vertical ring plate and the surface ring plate are arranged between the three, which can greatly improve the hardness of the entire clamping bracket, avoid deformation of the clamping bracket, and prolong the service life.

[0032] 2. Relative to the bottom surface of the pressing piece (equivalent to the support ring plate of the present technical solution) which is directly fitted with the upper end surface of the bearing, in the present technical solution, the support ring plate contacts the upper end surface of the bearing through an annular pressure strip, and the annular pressure strip is located directly below the vertical ring plate. When the lifting module presses down the bearing, the reaction force given by the bearing will first be transmitted to the annular pressure strip. At the same time, most of the reaction force received by the annular pressure strip will be absorbed by the vertical ring plate, thereby further avoiding deformation of the support ring plate.

[0033] 3. Multiple lifting modules apply pressure to the clamping bracket more evenly in the circumferential direction, ensuring that the clamping force of the bearing can be continuously maintained at the required constant value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the services required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 This is a front view of a wind turbine main shaft assembly bearing clamping device according to the utility model acting on a wind turbine main shaft assembly bearing;

[0036] Figure 2 It is a top view of a wind turbine main shaft assembly bearing clamping device according to the utility model acting on a wind turbine main shaft assembly bearing;

[0037] Figure 3The utility model is a cross-sectional view of a clamping bracket in a bearing clamping device of a main shaft assembly of a wind turbine generator.

[0038] Reference numerals:

[0039] 1-hollow jack; 2-support ring plate; 3-vertical ring plate; 4-surface ring plate; 5-annular pressure strip; 6-reinforcement rib; 7-connecting rod; 8-conical anchor; 9-flat anchor; 10-protrusion at the bottom of the main shaft; 11-pump station; 12-bearing. DETAILED DESCRIPTION

[0040] The utility model is further described below in conjunction with specific implementation methods:

[0041] like Figures 1 to 3 As shown, a bearing clamping device for a main shaft assembly of a wind turbine generator described in this embodiment includes a hollow jack 1, a connecting assembly, a clamping bracket sleeved on the main shaft, and a pump station 11.

[0042] Specifically, in this embodiment, the clamping bracket is in a circular ring shape, including a supporting ring plate 2, a vertical ring plate 3, and a surface ring plate 4;

[0043] The face ring plate 4 and the support ring plate 2 are arranged in parallel; the vertical ring plate 3 is connected between the face ring plate 4 and the support ring plate 2; reinforcing ribs 6 connected to the support ring plate 2, the vertical ring plate 3 and the face ring plate 4 are arranged between the three; an annular strip 5 in contact with the upper end surface of the bearing is arranged at the bottom of the support ring plate 2, and the annular strip 5 is located directly below the vertical ring plate 3.

[0044] Specifically, in this embodiment, the connection assembly includes a connection rod 7 , a conical anchor 8 , and a flat anchor 9 .

[0045] One end of the connecting rod 7 passes through the supporting ring plate 2 and the hollow jack 1 and is connected with the conical anchor 8 , and the other end passes through the protruding portion 10 at the bottom of the main shaft and is connected with the flat anchor 9 .

[0046] The hollow jack 1 is evenly arranged on the support ring plate 2 with the cooperation of the corresponding connecting rod 7, conical anchor 8 and flat anchor, and the distance between it and the protrusion 10 at the bottom of the main shaft is fixed with the cooperation of the corresponding connecting rod 7, conical anchor 8 and flat anchor.

[0047] The pump station 11 is connected to the plurality of hollow jacks 1 through a plurality of oil pipes.

[0048] The reinforcing ribs 6 of the clamping bracket are evenly arranged along the circumferential direction of the supporting ring plate 2 and are located on both sides of the corresponding hollow jacks 1 . Two reinforcing ribs 6 correspond to one hollow jack 1 .

[0049] In this embodiment, the pump station 11 cooperates with a plurality of hollow jacks 1 to apply pressure to the clamping bracket more evenly in the circumferential direction, thereby ensuring that the clamping force of the bearing 12 can be continuously maintained at a required constant value.

[0050] In addition, relative to the pressure piece with a hollow structure, in the present embodiment, the vertical ring plate 3 is connected between the surface ring plate 4 and the support ring plate 2; reinforcing ribs 6 which are connected to the support ring plate 2, the vertical ring plate 3 and the surface ring plate 4 are provided between the three, and are connected to the three at the same time, which can greatly improve the hardness of the entire clamping bracket, avoid deformation of the clamping bracket, and prolong the service life.

[0051] Furthermore, relative to the bottom surface of the pressure piece (equivalent to the support ring plate 2 of this embodiment) directly fitting with the upper end surface of the bearing 12, in this embodiment, the support ring plate 2 contacts the upper end surface of the bearing 12 through the annular pressure strip 5, and the annular pressure strip 5 is located directly below the vertical ring plate 3. When the lifting module presses down the bearing 12, the reaction force given by the bearing 12 will first be transmitted to the annular pressure strip 5. At the same time, most of the reaction force received by the annular pressure strip 5 will be absorbed by the vertical ring plate 3, thereby further avoiding deformation of the support ring plate 2.

[0052] In addition to the above-mentioned embodiments, the flat anchor 9 may be omitted, and the end of the connecting rod 7 away from the hollow jack 1 is directly connected to the protrusion 10 at the bottom of the main shaft.

[0053] The embodiments described above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made based on the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bearing clamping device for a main shaft assembly of a wind turbine generator, characterized in that: It includes a lifting module, a connecting assembly, and a clamping bracket sleeved on the main shaft; The clamping bracket is in a circular ring shape, including a supporting ring plate, a vertical ring plate, and a surface ring plate; The face ring plate and the support ring plate are arranged in parallel; The vertical ring plate is connected between the surface ring plate and the support ring plate; Between the support ring plate, the vertical ring plate and the surface ring plate, there are reinforcing ribs connected to the three at the same time; The lifting modules are evenly arranged on the supporting ring plate through corresponding connecting components, and the distance between the lifting modules and the protrusion at the bottom of the main shaft is fixed through the corresponding connecting components.

2. A wind turbine generator main shaft assembly bearing clamping device according to claim 1, characterized in that: An annular pressure strip is provided at the bottom of the supporting ring plate, and the annular pressure strip is located directly below the vertical ring plate.

3. A wind turbine generator main shaft assembly bearing clamping device according to claim 1, characterized in that: The reinforcing ribs are evenly arranged along the circumferential direction of the supporting ring plate.

4. A wind turbine generator main shaft assembly bearing clamping device according to claim 1, characterized in that: The reinforcing ribs are arranged on both sides of the jacking module.

5. A bearing clamping device for a main shaft assembly of a wind turbine generator according to any one of claims 1 to 4, characterized in that: The connecting assembly comprises a connecting rod, one end of which is connected to the protruding portion at the bottom of the main shaft, and the other end of which is connected to the jacking module.

6. A wind turbine generator main shaft assembly bearing clamping device according to claim 5, characterized in that: The jacking module is a hollow jack; The connection assembly also includes a first anchor; The connecting rod passes through the hollow jack; The hollow jack is connected to the connecting rod through a first anchor, and the distance between the hollow jack and the protrusion at the bottom of the main shaft is fixed under the cooperation of the first anchor and the connecting rod.

7. A bearing clamping device for a main shaft assembly of a wind turbine generator according to claim 6, characterized in that: The connection assembly also includes a second anchor; The connecting rod passes through the protruding portion at the bottom of the main shaft and is connected to the second anchor.

8. A bearing clamping device for a main shaft assembly of a wind turbine generator according to claim 6, characterized in that: The first anchor is a cone anchor.

9. A bearing clamping device for a main shaft assembly of a wind turbine generator according to claim 7, characterized in that: The second anchor is a flat anchor.

10. A bearing clamping device for a main shaft assembly of a wind turbine generator according to claim 6, characterized in that: The utility model also comprises a pump station, which is respectively connected with a plurality of hollow jacks through a plurality of oil pipes.

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