CN217010542U

CN217010542U - Insulating bearing sleeve structure for vertical motor

Info

Publication number: CN217010542U
Application number: CN202220470141.XU
Authority: CN
Inventors: 舒冬冬
Original assignee: Zhongda Motors Co Ltd
Current assignee: Zhongda Motors Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-19
Anticipated expiration: 2032-03-04

Abstract

The utility model relates to an insulating bearing sleeve structure for a vertical motor, which comprises a shaft, a bearing outer end cover, a bearing inner end cover, an insulating bearing sleeve assembly and a motor end cover, wherein the shaft is arranged on the shaft; the bearing is sleeved at the end part of the shaft, and a bearing insulation component is arranged outside the bearing; the bearing insulation assembly comprises an inner bearing sleeve, an outer bearing sleeve, an insulation layer and an insulation gasket, the inner bearing sleeve is fixedly connected with the upper end cover and the lower end cover of the bearing, and the outer bearing sleeve is fixedly connected with the end cover of the motor; the inner bearing sleeve is arranged in the inner ring of the outer bearing sleeve, and an insulating layer is arranged between the outer bearing sleeve and the inner bearing sleeve; the upper end of the inner bearing sleeve is provided with an outward annular bulge, and an insulating gasket is arranged between the annular bulge and the outer bearing sleeve. The inner bearing sleeve and the outer bearing sleeve are separated by the insulating layer, and the shaft current is blocked to form a loop, so that the bearing is protected, and the service life of the bearing is prolonged; the utility model has simple structure, low cost and easy installation and replacement.

Description

Insulating bearing sleeve structure for vertical motor

Technical Field

The utility model belongs to the technical field of bearing sleeves and relates to an insulating bearing sleeve structure for a vertical motor.

Background

In the running process of the motor, particularly in the variable frequency running process, shaft current is easy to generate, so that a motor bearing is damaged, and the motor fails to run; or, the current generated by the shaft voltage is not passed through the bearing and forms a circuit with the ground by using the grounded carbon brush, but the carbon brush is easily worn, so that the maintenance of the carbon brush is frequent, and most of the motors are limited in space and cannot be installed.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, solve the problems that an insulating bearing is expensive and a motor carbon brush is easy to wear and maintain frequently in the prior art, and provide a motor bearing sleeve structure which is simple in structure, low in cost, high in reliability and good in manufacturability and does not need frequent maintenance.

In order to achieve the purpose, the following technical scheme is adopted:

an insulating bearing bush structure for a vertical motor comprises a shaft, a bearing outer end cover, a bearing inner end cover, an insulating bearing bush component and a motor end cover; the bearing is sleeved at the end part of the shaft, an insulating bearing sleeve assembly is arranged outside the bearing and comprises an inner bearing sleeve, an outer bearing sleeve, an insulating layer and an insulating gasket, the inner bearing sleeve is fixedly connected with an upper end cover and a lower end cover of the bearing, and the outer bearing sleeve is fixedly connected with an end cover of the motor; the inner bearing sleeve is arranged in the inner ring of the outer bearing sleeve, and an insulating layer is arranged between the outer bearing sleeve and the inner bearing sleeve; an outward annular bulge is arranged at the upper end of the inner bearing sleeve, and an insulating gasket is arranged between the annular bulge and the outer bearing sleeve; the upper end of the bearing and bearing insulation component is provided with an outer bearing end cover, and the lower end of the bearing and bearing component is provided with an inner bearing end cover.

Preferably, the inner ring of the annular bulge is provided with a first groove, and insulating glue is coated in the first groove.

Preferably, a second groove is formed in the joint of the bottoms of the inner bearing sleeve and the outer bearing sleeve, and insulating glue is coated in the second groove.

Preferably, the inner bearing sleeve is provided with a connecting hole, the outer end cover of the bearing is provided with a through hole corresponding to the connecting hole, and the inner end cover of the bearing is provided with a first threaded hole corresponding to the connecting hole; the bearing outer end cover, the inner bearing sleeve and the bearing inner end cover are fixedly connected through a first bolt.

Preferably, the lower section of the outer bearing sleeve is provided with a connecting flange, the connecting flange is provided with a second threaded hole, the motor end cover is provided with a mounting hole corresponding to the second threaded hole, and the outer bearing sleeve and the motor end cover are connected and fixed through a second bolt.

Preferably, the insulating glue is an epoxy resin adhesive.

Compared with the prior art, the utility model has the following advantages:

1. the inner bearing sleeve and the outer bearing sleeve are separated by the insulating layer, and the shaft current is blocked to form a loop, so that the bearing is protected, and the service life of the bearing is prolonged.

2. The utility model adopts the design of the bearing sleeve, has simple structure and low cost, and is easy to install and replace.

Drawings

Fig. 1 is a schematic view of an assembly structure of the present invention.

FIG. 2 is a schematic view of an insulative bearing sleeve assembly of the present invention.

Fig. 3 is a schematic structural view of an inner bearing sleeve and an outer bearing sleeve of the present invention.

In the figure: 1. a shaft; 2. a bearing; 3. a bearing outer end cover; 4. an inner end cover of the bearing; 5. an insulating bearing housing assembly; 6. a motor end cover; 7. an inner bearing housing; 8. an outer bearing sleeve; 9. an insulating layer; 10. an insulating spacer; 11. an annular projection; 12. a first groove; 13. insulating glue; 14. a second groove; 15. connecting holes; 16. a through hole; 17. a first threaded hole; 18. a first bolt; 19. a connecting flange; 20. a second threaded hole; 21. mounting holes; 22. and a second bolt.

The specific implementation mode is as follows:

in order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, an insulating bearing bush structure for a vertical motor includes a shaft 1, a bearing 2, an outer bearing end cap 3, an inner bearing end cap 4, an insulating bearing bush assembly 5, and a motor end cap 6, where the bearing 2 is fitted at an end of the shaft 1, the insulating bearing bush assembly 5 is disposed at an outer side of the bearing 2, the insulating bearing bush assembly 5 includes an inner bearing bush 7, an outer bearing bush 8, an insulating layer 9, and an insulating gasket 10, the inner bearing bush 7 is fixedly connected with the outer bearing end cap 3 and the inner bearing end cap 4, and the outer bearing bush 8 is fixedly connected with the motor end cap 6; the inner bearing sleeve 7 is arranged in an inner ring of the outer bearing sleeve 8, and an insulating layer 9 is arranged between the outer bearing sleeve 8 and the inner bearing sleeve 7; an outward annular bulge 11 is arranged at the upper end of the inner bearing sleeve 7, and an insulating gasket 10 is arranged between the annular bulge 11 and the outer bearing sleeve 8; the upper ends of the bearings 2 and the insulating bearing sleeve assemblies 5 are provided with outer bearing end covers 3, and the lower ends of the bearings 2 and the insulating bearing sleeve assemblies 5 are provided with inner bearing end covers 4.

Further, the inner ring of the annular protrusion 11 is provided with a first groove 12, and an insulating glue 13 is coated in the first groove 12.

Furthermore, a second groove 14 is formed in the joint of the bottoms of the inner bearing sleeve 7 and the outer bearing sleeve 8, and an insulating glue 13 is coated in the second groove 14.

Furthermore, a connecting hole 15 is formed in the inner bearing sleeve 7, a through hole 16 corresponding to the connecting hole 15 is formed in the bearing outer end cover 3, and a first threaded hole 17 corresponding to the connecting hole 15 is formed in the bearing inner end cover 4; the bearing outer end cover 3, the inner bearing sleeve 7 and the bearing inner end cover 4 are fixedly connected by a first bolt 18.

Further, a connecting flange 19 is arranged at the lower section of the outer bearing sleeve 8, a second threaded hole 20 is formed in the connecting flange 19, a mounting hole 21 corresponding to the second threaded hole 20 is formed in the motor end cover 6, and the outer bearing sleeve 8 and the motor end cover 6 are connected and fixed through a second bolt.

Further, the insulating paste 13 is an epoxy resin-based adhesive.

The working principle is as follows: when the motor runs, the motor generates shaft voltage between the bearings at the two ends, if a loop is formed, shaft current is generated, when the shaft voltage is large enough, the shaft voltage can break through a layer of oil film between the ball of the bearing and the inner and outer steel rings, and a capacitor is formed between the ball of the bearing and the inner and outer steel rings of the bearing, and the capacitor starts to discharge to form local high temperature and burn so as to destroy the bearing of the motor; the utility model is provided with an insulating bearing bush component 5, an insulating layer 9, an insulating gasket 10 and insulating glue 13 are arranged between an inner bearing bush 7 and an outer bearing bush 8 of the insulating bearing bush component 5, and the insulating bearing bush component 5 insulates and isolates a bearing from a motor end cover 6, so that a loop cannot be formed among the shaft, the bearing and a motor shell, and the shaft voltage is blocked.

It will be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.

Claims

1. The utility model provides an insulating bearing housing structure for vertical motor, includes axle (1), bearing (2), the outer end cover of bearing (3), bearing inner end cover (4), insulating bearing housing subassembly (5), motor end cover (6), its characterized in that: the bearing (2) is sleeved at the end part of the shaft (1), an insulating bearing sleeve assembly (5) is arranged on the outer side of the bearing (2), the insulating bearing sleeve assembly (5) comprises an inner bearing sleeve (7), an outer bearing sleeve (8), an insulating layer (9) and an insulating gasket (10), the inner bearing sleeve (7) is fixedly connected with an outer end cover (3) of the bearing and an inner end cover (4) of the bearing, and the outer bearing sleeve (8) is fixedly connected with a motor end cover (6); the inner bearing sleeve (7) is arranged in the inner ring of the outer bearing sleeve (8), and an insulating layer (9) is arranged between the outer bearing sleeve (8) and the inner bearing sleeve (7); an outward annular bulge (11) is arranged at the upper end of the inner bearing sleeve (7), and an insulating gasket (10) is arranged between the annular bulge (11) and the outer bearing sleeve (8); the upper ends of the bearing (2) and the insulating bearing sleeve component (5) are provided with outer end covers (3) of the bearing, and the lower ends of the bearing (2) and the insulating bearing sleeve component (5) are provided with inner end covers (4) of the bearing.

2. The insulated bearing bush structure for the vertical motor according to claim 1, wherein: the inner ring of the annular bulge (11) is provided with a first groove (12), and an insulating glue (13) is coated in the first groove (12).

3. The insulating bearing bush structure for the vertical motor according to claim 1, characterized in that: and a second groove (14) is formed in the joint of the bottoms of the inner bearing sleeve (7) and the outer bearing sleeve (8), and insulating glue (13) is coated in the second groove (14).

4. The insulating bearing bush structure for the vertical motor according to claim 1, characterized in that: a connecting hole (15) is formed in the inner bearing sleeve (7), a through hole (16) corresponding to the connecting hole (15) is formed in the outer end cover (3) of the bearing, and a first threaded hole (17) corresponding to the connecting hole (15) is formed in the inner end cover (4) of the bearing; the outer end cover (3) of the bearing, the inner bearing sleeve (7) and the inner end cover (4) of the bearing are fixedly connected through a first bolt (18).

5. The insulated bearing bush structure for the vertical motor according to claim 1, wherein: the lower section of the outer bearing sleeve (8) is provided with a connecting flange (19), the connecting flange (19) is provided with a second threaded hole (20), the motor end cover (6) is provided with a mounting hole (21) corresponding to the second threaded hole (20), and the outer bearing sleeve (8) is connected and fixed with the motor end cover (6) through a second bolt.

6. An insulating bearing housing structure for a vertical motor according to claim 2 or 3, wherein: the insulating glue (13) is an epoxy resin series adhesive.