Bearing dismounting and fixing structure of high-voltage permanent magnet variable frequency motor

Abstract

The utility model relates to a bearing dismounting and fixing structure of a high-voltage permanent magnet variable frequency motor, which comprises a motor component and a case component, the motor component is fixedly arranged on the case component, the case component is provided with an end cover, the motor component is provided with a bearing module at the end cover, and the bearing module comprises a bearing, a bearing outer cover, a bearing inner cover and a bearing seat. The bearing outer cover, the bearing inner cover and the bearing seat jointly form a cavity for accommodating the bearing, and the support is detachably and fixedly arranged on the bearing inner cover. According to the technical scheme, the dismounting and fixing structure is designed for dismounting and mounting the bearing of the permanent magnet variable frequency motor, the rotor is fixed when the bearing is dismounted through the specific structure and technological method, it can be guaranteed that the relative position between the rotor and the stator is unchanged, the rotor is prevented from being attracted to the stator, and the difficulty of bearing reassembly caused by eccentricity is solved; when the bearing is disassembled, the end cover is not disassembled, and only the bearing seat and corresponding parts are disassembled.

Description

Technical Field

[0001] The utility model relates to a motor device, in particular to a bearing disassembly and fixing structure of a high-voltage permanent magnet variable-frequency motor. Background Art

[0002] A permanent magnet is installed on the rotor of a high-voltage permanent magnet variable-frequency motor, so that the whole rotor has strong magnetic force. Once eccentricity occurs between the rotor and the stator, a strong suction force will be generated between the rotor and the stator; the bearings at both ends of the permanent magnet variable-frequency motor can support the rotor and keep the gap between the stator and the rotor uniform. However, when maintaining and replacing the bearings, since the bearings need to be disassembled, without special measures, as the bearings are removed, eccentricity occurs between the rotor and the stator, and the rotor will firmly adsorb on the stator. It is difficult to align the rotor and the stator when installing the new bearings, which will bring great difficulties to the installation of the end cover or the bearing seat. Improper operation will also damage the bearings, bringing potential hazards to the subsequent operation of the motor. Summary of the Invention

[0003] To solve the above technical problems, the purpose of the utility model is to provide a bearing disassembly and fixing structure of a high-voltage permanent magnet variable-frequency motor, which includes an electric machine component and a chassis component. The electric machine component is fixedly installed on the chassis component. The chassis component has an end cover. The electric machine component has a bearing module at the end cover. The bearing module includes a bearing, a bearing outer cover, a bearing inner cover and a bearing seat. The bearing outer cover, the bearing inner cover and the bearing seat jointly form a cavity for accommodating the bearing. The structure also includes a bracket, and the bracket is detachably and fixedly installed on the bearing inner cover.

[0004] Preferably, the bearing seat is detachably and fixedly installed on the end cover, and there is an insulating ring between the bearing seat and the end cover.

[0005] Preferably, there are a lock nut and an oil slinger between the bearing outer cover and the bearing. The lock nut is threadedly engaged with a rotating shaft of the electric machine component to lock the oil slinger. The oil slinger is in contact with the inner ring of the bearing, that is, the oil slinger and the lock nut cooperate together to tightly fix the inner ring of the bearing.

[0006] Preferably, the bearing outer cover and the bearing inner cover are detachably and fixedly installed as a whole, and the bearing outer cover and the bearing inner cover cooperate together to tightly fix the outer ring of the bearing.

[0007] Preferably, the bracket includes a support disc and a support cylinder. A plurality of support ribs are evenly arranged between the support disc and the support cylinder in the circumferential direction. A plurality of threaded top holes for cooperating with the rotating shaft of the electric machine component are opened in the circumferential direction of the barrel body of the support cylinder.

[0008] Preferably, there is a gap between the bracket and the rotating shaft of the electric machine component.

[0009] Preferably, the bearing seat is detachably and fixedly installed on the end cover by bolts. There is an insulating sleeve between the bolts and the bearing seat, and the insulating sleeve is sleeved on the bolts.

[0010] With the above solution, the utility model has at least the following advantages:

[0011] The technical solution of this application designs a disassembly and fixing structure for the bearings of a permanent magnet variable frequency motor. By using a specific structure and process method to fix the rotor during bearing disassembly, the relative position between the rotor and the stator can be ensured to remain unchanged, preventing the rotor from being adsorbed to the stator, and solving the difficulty of bearing reassembly caused by eccentricity.

[0012] Furthermore, the technical solution of this application realizes that when disassembling and assembling the bearings, the end covers do not need to be disassembled, and only the bearing seats and corresponding components need to be disassembled and assembled.

[0013] The above description is only an overview of the technical solution of the utility model. In order to be able to more clearly understand the technical means of the utility model and implement it in accordance with the content of the description, the following takes the preferred embodiments of the utility model and combines with the drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of the utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0015] Figure 1 is a three-dimensional structural schematic diagram of a bearing disassembly and fixing structure of a high-voltage permanent magnet variable frequency motor of this application;

[0016] Figure 2 is a structural relationship schematic diagram between the end cover and the bearing module of this application;

[0017] Figure 3 is a sectional structural schematic diagram of the bearing module of this application;

[0018] Figure 4 is a three-dimensional structural schematic diagram of the bracket of this application.

[0019] In the figure: 1 electric machine component, 2 chassis component, 3 end cover, 4 bearing module, 5 bearing, 6 bearing outer cover, 7 bearing inner cover, 8 bearing seat, 9 bracket, 10 insulating ring, 11 locking nut, 12 oil slinger, 13 support disk, 14 support cylinder, 15 support rib, 16 threaded top mounting hole, 17 insulating sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the utility model. The following embodiments are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0021] See also Figures 1 to 4 A bearing disassembly and fixing structure of a high-voltage permanent magnet variable-frequency motor described in a preferred embodiment of the utility model includes a motor component 1 and a chassis component 2. The motor component 1 is fixedly mounted on the chassis component 2. The chassis component 2 has an end cover 3. The motor component 1 has a bearing module 4 located at the end cover 3. The bearing module 4 includes a bearing 5, a bearing outer cover 6, a bearing inner cover 7 and a bearing seat 8. The bearing outer cover 6, the bearing inner cover 7 and the bearing seat 8 together constitute a cavity for accommodating the bearing 5, and also includes a bracket 9, which is detachably and fixedly mounted on the bearing inner cover 7.

[0022] Preferably, the bearing seat 8 is detachably fixedly mounted on the end cover 3 , and an insulating ring 10 is provided between the bearing seat 8 and the end cover 3 .

[0023] The insulating ring 10 and the insulating sleeve 18 can effectively prevent the bearing 5 from being connected to the end cover 3 through the bearing seat 8, and avoid the shaft current from flowing through the bearing 5 to the end cover 3, thereby playing a role in preventing the shaft current.

[0024] Preferably, there are locking nut 11 and oil-slinging plate 12 between the bearing outer cover 6 and the bearing 5. The locking nut 11 locks the oil-slinging plate 12 by cooperating with the shaft thread of the motor component 1. The oil-slinging plate 12 fits against the inner ring of the bearing 5, that is, the oil-slinging plate 12 cooperates with the locking nut 11 to tighten and fix the inner ring of the bearing 5.

[0025] Preferably, the bearing outer cover 6 and the bearing inner cover 7 are detachably fixedly mounted as a whole, and the bearing outer cover 6 and the bearing inner cover 7 cooperate with each other to tighten and fix the outer ring of the bearing 5 .

[0026] The bearing outer cover 6 and the bearing inner cover 7 can be fastened together by bolts.

[0027] Preferably, the bracket 9 includes a support plate 13 and a support tube 14, a plurality of support ribs 15 are evenly arranged between the support plate 13 and the support tube 14 along the circumferential direction, and the body of the support tube 14 has a plurality of threaded top mounting holes 16 along the circumferential direction that match the rotating shaft of the motor component 1.

[0028] The bracket 9 is bolted to the end cover 3 to form an integral body therewith, and through its multiple threaded top-mounting holes 16, it can support the rotating shaft. At the same time, there is a gap between the bracket 9 and the rotating shaft, which can ensure that the rotating shaft will not rub against the bracket 9 during rotation.

[0029] Preferably, there is a gap between the bracket 9 and the rotating shaft of the motor component 1 .

[0030] Preferably, the bearing seat 8 is detachably fixed to the end cover 3 by bolts. There is an insulating sleeve 17 between the bolts and the bearing seat 8, and the insulating sleeve 17 is sleeved on the bolts.

[0031] The working principle of the present utility model is as follows:

[0032] When disassembling the bearing 5, first use bolts to top-dead-center the rotating shaft through the multiple threaded mounting holes 16 of the bracket 9, and then sequentially remove the bearing outer cover 6, the locking nut 11, the oil slinger 12 and the bearing seat 8. At this time, the bearing 5 can be pulled out. At the same time, since the rotating shaft is fixed by top-dead-centering with bolts, the position between the rotor and the stator of the entire motor will not change, and the rotor can be ensured not to adsorb to the stator. At this time, when reinstalling the bearing 5 and assembling the bearing seat 8, because the rotor and the stator remain concentric, the assembly of the bearing seat 8 will necessarily be easy and effortless. Then sequentially reinstall other components to complete the replacement process of the bearing 5.

[0033] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A bearing disassembly and fixing structure for a high-voltage permanent magnet variable-frequency motor, comprising an electric machine member (1) and a chassis member (2), wherein the electric machine member (1) is fixedly installed on the chassis member (2), and is characterized in that: The chassis component (2) has an end cover (3). At the end cover (3), there is an electric machine component (1) with a bearing module (4). The bearing module (4) includes a bearing (5), a bearing outer cover (6), a bearing inner cover (7), and a bearing housing (8). The bearing outer cover (6), the bearing inner cover (7), and the bearing housing (8) together form a cavity for accommodating the bearing (5). It further includes a bracket (9), and the bracket (9) is detachably and fixedly installed on the bearing inner cover (7).

2. The bearing disassembly and fixing structure of a high-voltage permanent magnet variable-frequency motor according to claim 1, wherein: The bearing housing (8) is detachably and fixedly installed on the end cover (3), and there is an insulating ring (10) between the bearing housing (8) and the end cover (3).

3. The bearing disassembly and fixing structure of a high-voltage permanent magnet variable-frequency motor according to claim 1, wherein: There is a lock nut (11) and an oil slinger (12) between the bearing outer cover (6) and the bearing (5). The lock nut (11) is threadedly engaged with the rotating shaft of the electric machine component (1) to lock the oil slinger (12). The oil slinger (12) is in contact with the inner ring of the bearing (5), that is, the oil slinger (12) and the lock nut (11) cooperate together to tightly fix the inner ring of the bearing (5).

4. A bearing disassembly and fixing structure of a high-voltage permanent magnet variable-frequency motor according to claim 1, characterized in that: The bearing outer cover (6) and the bearing inner cover (7) are detachably and fixedly installed as a whole, and the bearing outer cover (6) and the bearing inner cover (7) cooperate together to tightly fix the outer ring of the bearing (5).

5. The bearing disassembly and fixing structure of a high-voltage permanent magnet variable frequency motor according to claim 1, characterized in that: The bracket (9) includes a support disk (13) and a support cylinder (14). A number of support ribs (15) are evenly arranged in the circumferential direction between the support disk (13) and the support cylinder (14). A number of threaded top holes (16) that cooperate with the rotating shaft of the electric machine component (1) are provided in the circumferential direction on the barrel body of the support cylinder (14).

6. The bearing disassembly and fixation structure of a high-voltage permanent magnet variable-frequency motor according to claim 1 or 5, characterized in that: There is a gap between the bracket (9) and the rotating shaft of the electric machine component (1).

7. A bearing disassembly and fixing structure for a high-voltage permanent magnet variable-frequency motor according to claim 1, characterized in that: The bearing housing (8) is detachably and fixedly installed on the end cover (3) by bolts. There is an insulating sleeve (17) between the bolts and the bearing housing (8), and the insulating sleeve (17) is sleeved on the bolts.

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