1.5mw double-fed wind turbine 6332 deep groove ball rolling bearing ring type dismounting tool

Abstract

The utility model provides 1.5MW double -fed wind driven generator 6332 deep groove ball rolling bearing ring formula dismounting frock relates to wind driven generator technical field, including wind driven generator rotor, the surface of wind driven generator rotor is provided with ring formula dismounting subassembly. In the utility model, the advantage is compact structure, can assemble and debug in advance before dismounting 6332 deep groove ball rolling bearing, can be reused when holding and grabbing bearing inner ring after debugging, has reduced the link of operation in the narrow space, the operator can master the skill of using the frock after training, and the operability is stronger compared with traditional bearing dismounting frock. Another advantage is that 6332 deep groove ball rolling bearing ring formula dismounting frock can change its structure shape, when installing frock, can change its end face projection area to minimum, namely end face projection deformation is a ring, and the ring shape just coincides with wind driven generator bearing end face clearance, effectively solves the difficult problem of not easy installation in narrow space.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, and in particular to a ring-type disassembly tool for the 6332 deep groove ball rolling bearing of a 1.5MW doubly fed wind turbine. Background Technology

[0002] Currently, domestically produced wind turbines have been used in my country for nearly twenty years. The designed service life of wind turbine generator sets is twenty years due to various factors such as working environment, manufacturer, operation, and maintenance. Wind turbine generator sets are often installed in the Gobi Desert or coastal areas where wind speeds consistently reach level seven or higher. To ensure the normal operation of wind turbine generators, the motor bearings use deep groove ball bearings, NU type cylindrical roller bearings, or a combination of deep groove ball bearings and NU type cylindrical roller bearings. The bearings use Klüber, Shell, and Mobil greases. 6332 deep groove ball bearings are mainly used in 1.5MW doubly-fed wind turbine generators. 6332 deep groove ball bearings are more stable than other types of bearings, but the lifespan of the rolling bearings is 1-5 years due to the influence of wind, sand, sea salt, and water vapor, as well as the operation and maintenance conditions of the wind farm. If a rolling bearing fails and the generator needs to be replaced, the cost of high-altitude hoisting is approximately 100,000 yuan. To reduce maintenance costs, it is often necessary to disassemble the old bearing at high altitude and reassemble the new one. The motor's bearings, which use deep groove ball bearings, failed. The nacelle space on the wind turbine tower crane at a height of 77 meters is small, so a compact and reliable disassembly tooling is required to remove the old deep groove ball bearings.

[0003] Currently, the mainstream method for disassembling 6332 deep groove ball bearings in the confined space of the nacelle on a wind turbine tower crane at a height of 77 meters is the pull-out method. This method involves assembling a tooling unit on-site within the limited space of the tower crane nacelle to hold the inner ring of the bearing (the current tooling requires assembling multiple loose parts on-site, and the back plate used for pulling is a two- or three-part assembly). The discarded deep groove ball bearing is then removed using a top plate, threaded tie rods, and hydraulic or mechanical screw jacks. Because assembling the tooling unit on-site in such a confined space is extremely difficult for maintenance personnel, the work demands a high level of physical fitness, technical proficiency, and coordination from the personnel. The procedures are very complex, and even a slight mistake can lead to failure in high-altitude maintenance. The only alternative is to hoist the generator to the ground for maintenance, with high-altitude hoisting costs around 100,000 yuan per unit. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that existing devices for assembling and engaging the inner ring of rolling bearings in confined spaces are extremely difficult for maintenance personnel to operate and are very expensive.

[0005] To achieve the above objectives, this technical solution adopts the following utility model invention: a circular disassembly fixture for a 1.5MW doubly-fed wind turbine 6332 deep groove ball rolling bearing, including a wind turbine rotor, characterized in that: a circular disassembly assembly is provided on the surface of the wind turbine rotor, the circular disassembly assembly includes a circular fixing plate, eight sets of nuts are annularly connected to the rear end of the circular fixing plate, eight sets of bushings are in front of the nuts, and eight sets of integrated pin shaft screw hooks are annularly connected to the front end of the wind turbine rotor.

[0006] Furthermore, the integrated pin screw hook is mounted on a circular fixed plate and is connected and fastened by a bushing and a nut. The integrated pin screw hook can rotate 90° along the mounting hole.

[0007] Furthermore, a jack is connected to the front or rear end of the wind turbine rotor, and a top plate is connected to the front or rear end of the jack.

[0008] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This device can be used to clamp the inner ring of a rolling bearing in a confined space, ultimately disassembling the 6332 deep groove ball rolling bearing. Its advantages include a compact structure, allowing for pre-assembly and debugging before disassembling the 6332 deep groove ball rolling bearing. After debugging, it can be reused when clamping the bearing inner ring, reducing the steps involved in operating in confined spaces. Operators can master the skills of using this tool after training, making it more operable than traditional bearing disassembly tools. Another advantage is that the 6332 deep groove ball rolling bearing ring-type disassembly tool can change its structural shape. During installation, its end face projection area can be minimized, i.e., the end face projection deforms into a ring. The ring shape perfectly matches the gap on the end face of the wind turbine bearing, effectively solving the problem of difficult installation in confined spaces. Attached Figure Description

[0009] Figure 1 A three-dimensional structural schematic diagram of the annular disassembly fixture for the 6332 deep groove ball rolling bearing of a 1.5MW doubly fed wind turbine is provided for this utility model.

[0010] Figure 2 A schematic diagram of the hook claw unfolding structure of the annular disassembly tool for the 6332 deep groove ball rolling bearing of the 1.5MW doubly fed wind turbine is provided for this utility model.

[0011] Figure 3 A schematic diagram of the folding hook claw of the annular disassembly tool for the 6332 deep groove ball rolling bearing of the 1.5MW doubly fed wind turbine is provided for this utility model.

[0012] Figure 4 This utility model presents an exploded view of the circular fixing plate of the annular disassembly fixture for the 6332 deep groove ball bearing of a 1.5MW doubly-fed wind turbine.

[0013] Legend: 1. Wind turbine rotor; 2. Jack; 3. Top plate; 4. Circular disassembly assembly; 401. Circular fixing plate; 402. Nut; 403. Bushing; 404. Integrated pin, screw, and claw. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Examples, such as Figure 1 - Figure 4 As shown, this utility model provides a ring-type disassembly fixture for the 6332 deep groove ball bearing of a 1.5MW doubly-fed wind turbine generator. The fixture includes a wind turbine rotor 1, and a ring-type disassembly assembly 4 is provided on the surface of the rotor 1. The ring-type disassembly assembly 4 includes an integrated pin, screw, and claw 404 mounted on a circular fixing plate 401, and is connected and secured by a bushing 403 and a nut 402. The integrated pin, screw, and claw 404 can rotate 90° along the mounting hole.

[0017] like Figure 2 - Figure 4 As shown, Figure 2 To lock the bearing in its state, Figure 3 In the installed state, Figure 4 Exploded view developed for utility model.

[0018] like Figure 1 As shown, a jack 2 is connected to the front end of the wind turbine rotor 1, and a top plate 3 is connected to the front end of the jack 2. The jack 2 and the top plate 3 can realize precise support, safe maintenance and dynamic adjustment of the rotor system.

[0019] The 6332 deep groove ball bearing, used as the front and rear bearings of the main shaft of a 1.5MW doubly fed wind turbine, weighs 26.43kg and is classified as a heavy-duty bearing. Its inner ring is interference-fitted with the main shaft. Due to the limited space in the nacelle, the dense oil pipes, and the safety regulations prohibiting open flame heating, it can only be disassembled on site by pulling. Traditional pulling fixtures require on-site assembly of disparate parts to hook the inner ring of the bearing, which is cumbersome and relies on the accuracy of manual assembly for reliability. The patented fixture proposed this time achieves an assembly-free design through structural innovation. During the design process, two 1-meter-long, 2-mm-thick feeler gauges are used to adjust the stator and rotor clearance of the front and rear end covers of the generator. After disassembling the bearing head of the end cover, it is found that there is an axial annular space between the inner circle of the end cover and the outer ring of the bearing. Based on this, the end face projection of the fixture is designed as an annular structure that matches this space. Its axial direction adopts a double-layer layout: the outer layer is an integral circular fixing plate 401, and the inner layer is a rotatable integrated pin screw hook 404 composed of eight equally divided rings. Each integrated pin screw hook 404 can rotate independently by fixing the pin screw. When in use, adjust the end face of the integral circular fixing plate 401 and the integrated pin screw hook 404 assembly to be flush with the rear end of the bearing and embed it into the annular space. Then rotate each integrated pin screw hook 404 to quickly hook onto the inner ring of the bearing. The rigidity of the tooling structure itself ensures operational reliability. Compared with traditional tooling, it reduces assembly steps and significantly improves disassembly efficiency and safety in confined spaces.

[0020] This invention reduces the maintenance cost of the 6332 rolling bearing in a 1.5MW wind turbine, avoiding the high hoisting costs associated with lifting the entire wind turbine unit off the tower. Maintenance personnel can replace the bearing in the nacelle using the new 6332 rolling bearing disassembly tool, achieving the goal of replacing the bearing on the tower and reducing maintenance costs. The circular disassembly fully utilizes the operating space between the bearing end cover and the bearing. The integrated pin-shaft screw hook 404 rotates along the circular indexing line to pull the inner ring of the bearing, achieving rapid gripping of the inner ring. The new tooling shortens assembly time and reduces the assembly difficulty and labor intensity for maintenance personnel. Promoting the new tooling will help reduce the maintenance cost of the 1.5MW heavy-duty 6332 bearing in wind power, and has positive practical significance for fully utilizing wind energy and ensuring the stable operation of wind farm units.

[0021] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. 1.5MW doubly-fed wind turbine 6332 deep groove ball rolling bearing annular disassembly fixture, including wind turbine rotor (1), characterized in that: The surface of the wind turbine rotor (1) is provided with a ring-shaped disassembly assembly (4). The annular disassembly assembly (4) includes a circular fixing plate (401), with eight sets of nuts (402) connected to the rear end of the circular fixing plate (401) in an annular manner, and eight sets of bushings (403) in front of the nuts. The front end of the wind turbine rotor (1) is connected to eight sets of integrated pin shaft screw claws (404).

2. The annular disassembly fixture for the 6332 deep groove ball bearing of a 1.5MW doubly-fed wind turbine generator according to claim 1, characterized in that: The integrated pin screw hook (404) is mounted on a circular fixed plate (401) and is connected and fastened by a bushing (403) and a nut (402). The integrated pin screw hook (404) can rotate 90° along the mounting hole.

3. The annular disassembly fixture for the 6332 deep groove ball bearing of a 1.5MW doubly-fed wind turbine generator according to claim 2, characterized in that: The front end or rear end of the wind turbine rotor (1) is connected to a jack (2), and the front end or rear end of the jack (2) is connected to a top plate (3).

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