A bearing sealing structure and a generator
By forming a narrow slit or labyrinth structure at the front and rear bearings of the generator, the problem of poor bearing protection in the generator is solved, achieving effective protection without affecting the external dimensions of the generator.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFANG PRESTOLITE ELECTRIC
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-03
AI Technical Summary
Existing generator bearings cannot effectively prevent foreign objects from contacting them in certain locations, especially in open structures with limited space, resulting in limited protection. Furthermore, existing protective structures may affect the external dimensions of the generator.
By forming a narrow slit or labyrinth structure with the front and rear bearings respectively, a relatively sealed space is created to prevent foreign objects from contacting the bearings, while not affecting the external dimensions of the generator.
It achieves effective protection for the front and rear bearings, prevents contact with foreign objects, improves the overall protection performance of the machine, reduces costs, and has a simple structure that does not affect the external dimensions of the generator.
Smart Images
Figure CN224459477U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of generator technology, specifically relating to a bearing sealing structure and a generator. Background Technology
[0002] The solutions for preventing foreign objects from entering the bearings in generators are as follows: the bearing and nearby components (such as the front cover and pulleys) form a relatively enclosed space, or the bearing is in a sealed environment (such as the rear bearing, where the rotor, slip ring seal, and regulator work together) to prevent foreign objects from contacting the bearing. Some generator bearings are open due to space constraints, which cannot prevent foreign objects from contacting the bearing. For example, the rear end face (non-pulley side) of the front bearing with riveting / ring locking and the front end face of the rear bearing (claw pole side of the internal cooling fan motor) can only prevent foreign objects from entering the bearing through its own sealing structure, offering limited protection. Sometimes a cover plate is used for protection at the rear end of the front bearing, but this requires a large space and can limit the axial dimensions of the generator or the size of the fan. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a bearing sealing structure and a generator to address the shortcomings of the existing technology. This bearing sealing structure does not affect the external dimensions of the existing generator, is applicable to most bearings' foreign object protection requirements, can effectively prevent foreign objects from contacting the bearing, and has a relatively simple structure.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0005] A bearing sealing structure includes a front bearing, which is mounted on a front end cover by riveting or bearing retainer. The outer ring of the front bearing is tightly fitted with the inner ring of the front bearing housing on the front end cover. The rear end face of the front bearing housing and the rear end component of the front bearing cooperate to form a first sealing structure. The first sealing structure makes the rear end of the front bearing form a relatively sealed space.
[0006] Furthermore, the rear end component of the front bearing is an internal cooling fan, a claw pole, or an adjusting sleeve.
[0007] Furthermore, the front end face of the inner ring of the front bearing is tightly fitted with the front end component of the front bearing, and the front end component of the front bearing is fitted with the front end face of the front bearing housing to form a second sealing structure, which makes the front end of the front bearing form a relatively sealed space.
[0008] Furthermore, the front bearing front end component is a pulley, an external cooling fan, or an adjusting sleeve.
[0009] Furthermore, it also includes a rear bearing, the outer ring of which fits tightly with the inner ring of the rear bearing chamber on the rear end cover, and the front end face of the rear bearing chamber fits with the front end component of the rear bearing to form a third sealing structure, which makes the front end of the rear bearing form a relatively sealed space.
[0010] Furthermore, the front end component of the rear bearing is a rear fan, claw pole, or slip ring assembly.
[0011] Furthermore, the first sealing structure, the second sealing structure, and the third sealing structure are narrow slit structures.
[0012] Furthermore, the first sealing structure, the second sealing structure, and the third sealing structure are labyrinth structures.
[0013] Furthermore, a portion of the sealing structure in the first, second, and third sealing structures is a narrow slit structure, and another portion is a labyrinth structure.
[0014] A generator includes a pulley, a front bearing, a front end cover, a rotor assembly, a stator assembly, a rear bearing, a rear end cover, a regulator, a rectifier bridge, a rear cover, and the aforementioned bearing sealing structure.
[0015] After adopting the above technical solution, the beneficial effects of this utility model are:
[0016] The bearing sealing structure disclosed in this utility model can effectively protect the rear end face of the front bearing that uses riveting or bearing retainer rings for locking. It is applicable to most bearings' foreign object protection requirements, effectively prevents foreign objects from contacting the bearing, and has a relatively simple structure.
[0017] In this invention, the front end face of the front bearing and the front end face of the rear bearing can also be effectively protected, preventing foreign objects from contacting the bearings, and the structure is relatively simple.
[0018] In this invention, the bearing sealing structure does not affect the external dimensions of the existing generator and meets the foreign object protection requirements of most bearings, effectively improving the overall protection performance and reducing costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of a generator in the prior art;
[0020] Figure 2 This is a schematic diagram of the bearing sealing structure at the front bearing of this utility model;
[0021] Figure 3 This is a schematic diagram of the bearing sealing structure at the bearing location of this utility model.
[0022] In the diagram, 1-pulley, 2-front bearing, 3-front end cover, 31-front bearing housing, 4-rotor assembly, 5-stator assembly, 6-rear bearing, 7-rear end cover, 71-rear bearing housing, 8-regulator, 9-rectifier bridge, 10-rear cover, 11-internal cooling fan, 12-rotor shaft, 13-bearing retainer, 14-rear end fan, 15-first sealing structure, 16-second sealing structure, 17-third sealing structure. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.
[0024] In the description of this specification, it should be understood that, for the description of orientation, "front" refers to the side of the generator with pulley 1, that is, the left side in the attached drawing, and "rear" refers to the side of the generator with rear cover 10, that is, the right side in the attached drawing.
[0025] Example 1:
[0026] like Figure 2 As shown, a bearing sealing structure includes a front bearing 2, which is mounted to a front end cover 3 by riveting or bearing retainer 13. The inner ring of the front bearing 2 is tightly fitted with the rotor shaft 12, and the outer ring of the front bearing 2 is tightly fitted with the inner ring of the front bearing chamber 31 of the front end cover 3. The rear end component of the front bearing is tightly fitted with the rotor shaft 12, and the rear end face of the front bearing chamber 31 and the rear end component of the front bearing cooperate to form a first sealing structure 15. This can be achieved by machining or molding the existing front end cover 3 and the rear end component of the front bearing. The first sealing structure 15 makes the rear end of the front bearing 2 form a relatively closed space A, which is isolated from the external environment.
[0027] The rear end component of the front bearing can be an internal cooling fan 11, a claw pole (the front claw pole and the rear claw pole in the rotor assembly 4) or an adjusting sleeve (a structure used to adjust the axial position of the pulley 1), or other components can be used instead. In this application, the rear end component of the front bearing is an internal cooling fan 11 as an example.
[0028] To further enhance the protective effect at the front bearing 2, the front end face of the inner ring of the front bearing 2 is tightly fitted with the front end component of the front bearing. The front end component of the front bearing and the front end face of the front bearing chamber 31 are fitted together to form a second sealing structure 16. The second sealing structure 16 makes the front end of the front bearing 2 form a relatively closed space B, thereby isolating the front end of the front bearing 2 from the external environment.
[0029] The front bearing front end component can be a pulley 1, an external cooling fan, or an adjusting sleeve, or other components can be used instead. In this application, the front bearing front end component is exemplified by the pulley 1.
[0030] like Figure 3 As shown, to enhance the protective effect at the rear bearing 6, the bearing sealing structure also includes the rear bearing 6. The inner ring of the rear bearing 6 is tightly fitted with the rotor shaft 12, and the outer ring of the rear bearing 6 is tightly fitted with the inner ring of the rear bearing chamber 71 of the rear end cover 7. The front end face of the rear bearing chamber 71 cooperates with the front end component of the rear bearing to form a third sealing structure 17. The third sealing structure 17 makes the front end of the rear bearing 6 form a relatively closed space C, which is isolated from the external environment.
[0031] In this application, the front end component of the rear bearing 6 is the rear fan 14, a claw pole or a slip ring assembly, or other components may be used instead. The rear fan 14 is used as the front end component of the rear bearing in this application.
[0032] In this application, the first sealing structure 15, the second sealing structure 16 and the third sealing structure 17 can be a narrow slit structure or a labyrinth structure, or a portion of the sealing structures can be narrow slit structures and another portion can be labyrinth structures.
[0033] The maze structure is specifically a complex channel formed by the cooperation of two components, both of which can rotate along the rotor shaft 12. The width of the maze channel in this application is preferably 0.5 mm. This prevents objects with a minimum characteristic size (the smallest size obtainable by projecting an object in any direction, for example, a cuboid with a length of 3m, a width of 2m, and a height of 1m, where the minimum characteristic size is 1m) larger than 0.5 mm from entering the maze channel. When an object with a minimum characteristic size diameter less than 0.5 mm enters the maze channel, the presence of corners increases the difficulty of the object reaching the end of the maze channel. Simultaneously, the rotational motion of the motor and the gravity of the object preferentially eject it from the maze channel.
[0034] Therefore, the maze structure provides better protection than the narrow slit structure. This patent preferably uses the first sealing structure 15, the second sealing structure 16, and the third sealing structure 17 as maze structures.
[0035] Example 2:
[0036] A generator includes a pulley 1, a front bearing 2, a front end cover 3, a rotor assembly 4, a stator assembly 5, a rear bearing 6, a rear end cover 7, a regulator 8, a rectifier bridge 9, and a rear protective cover 10. It also includes the bearing sealing structure of Embodiment 1, where the front end cover 3 and the rear end cover 7 at the front bearing 2 and the rear bearing 6 form the corresponding sealing structure in Embodiment 1 with nearby components. This design does not affect the external dimensions of existing generators, meets the foreign object protection requirements of most bearings, effectively improves the overall protection performance of the generator, and reduces costs.
[0037] The bearing sealing structure and generator of this utility model form a sealing structure by cooperating with the front and rear end covers of the front and rear bearings and the nearby components. This makes the front and / or rear ends of the front and rear bearings form a relatively closed space, which is isolated from the external environment. This effectively prevents foreign objects from contacting the bearings and the structure is relatively simple and does not affect the external dimensions of the generator.
[0038] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Unless otherwise expressly defined, terms such as "set," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0039] While specific embodiments of this utility model have been described above, those skilled in the art should understand that the described embodiments are merely some, not all, embodiments of this utility model. These are merely illustrative examples, and the scope of protection of this utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model and without any inventive effort, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A bearing seal structure comprising a front bearing, the front bearing (2) being mounted to a front end cover (3) by a spin rivet or bearing collar (13), characterised in that, The outer ring of the front bearing (2) is tightly fitted with the inner ring of the front bearing chamber (31) on the front end cover (3). The rear end face of the front bearing chamber (31) and the rear end component of the front bearing are fitted together to form a first sealing structure (15). The first sealing structure (15) makes the rear end of the front bearing (2) form a relatively closed space.
2. The bearing seal structure of claim 1, wherein, The rear end component of the front bearing is an internal cooling fan (11), a claw pole, or an adjusting sleeve.
3. The bearing seal structure of claim 1, wherein, The front end face of the inner ring of the front bearing (2) fits tightly with the front end component of the front bearing, and the front end component of the front bearing fits with the front end face of the front bearing chamber (31) to form a second sealing structure (16). The second sealing structure (16) makes the front end of the front bearing (2) form a relatively closed space.
4. The bearing seal structure of claim 3, wherein, The front bearing front end component is a pulley (1), an external cooling fan, or an adjusting sleeve.
5. The bearing seal structure of claim 3, wherein, It also includes a rear bearing (6), the outer ring of the rear bearing (6) is tightly fitted with the inner ring of the rear bearing chamber (71) on the rear end cover (7), and the front end face of the rear bearing chamber (71) is fitted with the front end component of the rear bearing to form a third sealing structure (17), which makes the front end of the rear bearing (6) form a relatively closed space.
6. The bearing seal structure of claim 5, wherein, The front end component of the rear bearing is the rear fan (14), claw pole or slip ring assembly.
7. The bearing seal structure of claim 5, wherein, The first sealing structure (15), the second sealing structure (16), and the third sealing structure (17) are narrow slit structures.
8. The bearing seal structure of claim 5, wherein, The first sealing structure (15), the second sealing structure (16), and the third sealing structure (17) are labyrinth structures.
9. The bearing seal structure of claim 5, wherein, One part of the sealing structure in the first sealing structure (15), the second sealing structure (16), and the third sealing structure (17) is a narrow slit structure, and the other part of the sealing structure is a labyrinth structure.
10. A generator, comprising a pulley (1), a front bearing (2), a front end cover (3), a rotor assembly (4), a stator assembly (5), a rear bearing (6), a rear end cover (7), a regulator (8), a rectifier bridge (9), and a rear protective cover (10), characterized in that, It also includes the bearing sealing structure as described in any one of claims 1 to 9.