CN217508419U

CN217508419U - Sealing structure of explosion-proof motor

Info

Publication number: CN217508419U
Application number: CN202122917005.9U
Authority: CN
Inventors: 李佳友; 李文龙; 童艳芳
Original assignee: Jiangtian Motor Co ltd
Current assignee: Jiangtian Motor Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-09-27
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses an explosion-proof machine's seal structure, including the spindle, install at epaxial rotor through the interference fit mode, the cover is established at epaxial bearing, and the end cover and the sealing device at frame both ends are installed to the frame, sealing device includes axial plane oil blanket device and curved road sealing device. The utility model discloses a set up axial plane oil blanket device in the motor end cover outside, set up curved path sealing device again in both ends bearing department simultaneously, structural change is simple, and the incremental cost is not many, simple to operate, the maintenance is simple, and the wall axle that moreover can be fine link up the passageway of the inside and outside cavity of department, improves protection level.

Description

Sealing structure of explosion-proof motor

Technical Field

The utility model relates to an explosion proof machine technical field especially relates to an explosion proof machine's seal structure.

Background

The explosion-proof motor can be used in flammable and explosive places, and does not generate electric sparks during operation. Explosion-proof motors are used as main power equipment, and are generally used for driving pumps, fans, compressors and other transmission machines. The method is widely applied to industries and places such as coal mines, metallurgy, petroleum and natural gas, petrochemical industry, textile, urban gas, traffic, grain and oil processing, paper making, medicine, fuel oil filling stations and the like. With the development of economy and science and technology, particularly the rapid development of high and new technologies, higher requirements are put on the performance of explosion-proof motor products. The protection grade of the explosion-proof motor under severe working environments needs to meet the requirement of IP66 so as to meet the operation requirement. The protection grade of the existing explosion-proof motor is IP55, and the defect of insufficient sealing of a shaft through part occurs when working in dust, outdoors or in marine climate, so that a bearing is easy to damage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion proof machine's seal structure sets up the axial plane oil blanket device in the motor end cover outside, sets up curved sealing device again in both ends bearing department simultaneously to solve the low technical problem of current explosion proof machine protection level.

In order to achieve the above purpose, the specific technical solution of the present invention is as follows:

the utility model provides a seal structure of explosion-proof machine, includes the spindle, installs the rotor at the spindle through interference fit mode, and the cover is established at epaxial bearing, and the end cover and the sealing device at frame both ends are installed to the frame, sealing device includes axial plane oil blanket device and tortuous way sealing device.

Preferably, the bearing comprises an inner ring and an outer ring, the inner ring of the bearing is sleeved on the crankshaft in an interference fit mode, and the outer ring of the bearing is arranged on the end cover.

Preferably, the end caps are fixedly mounted at both ends of the housing by screws.

Preferably, the shaft surface oil seal device is arranged outside the end cover, the curved path seal device is arranged inside the end cover, and the shaft surface oil seal device and the curved path seal device together play a role in sealing protection outside the bearing.

Preferably, the labyrinth seal is mounted on the crankshaft by interference fit.

Preferably, the labyrinth seal device has a protruding piece protruding outwards, a groove is arranged at a position of the end cover corresponding to the protruding piece, a small gap is arranged between the protruding piece and the groove, and the labyrinth seal device is connected with the inner ring of the bearing.

The utility model has the advantages of it is following:

the utility model discloses a set up the axial plane oil blanket device in motor end cover outside, set up curved path sealing device again in both ends bearing department simultaneously, structural change is simple, and the incremental cost is not many, simple to operate, and the maintenance is simple, and the wall axle that moreover can be fine link up the passageway of the inside and outside cavity of department improves protection level.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

the notation in the figure is: 1. an axial surface oil seal device; 2. a labyrinth seal device; 3. a bearing; 4. an end cap; 5. a machine base; 6. a rotor; 7. the crankshaft.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a sealing structure of explosion-proof machine, including spindle 7, install rotor 6 on spindle 7 through the interference fit mode, the cover is established and is established bearing 3 on spindle 7, frame 5, installs end cover 4 and sealing device at frame 5 both ends, cuts off lining up of interior outer cavity through sealing device, reaches IP 66's protection level.

The bearing 3 comprises an inner ring and an outer ring, the inner ring of the bearing 3 is sleeved on the crankshaft 7 in an interference fit mode, and the outer ring is arranged on the end cover 4. The end covers 4 are fixedly installed at both ends of the base 5 by screws.

The sealing device comprises an axial surface oil sealing device 1 and a curved sealing device 2, wherein the axial surface oil sealing device 1 is arranged outside the end cover 4 and plays a role in sealing and protecting. The curved sealing device 2 is arranged inside the end cover 4 and outside the bearing 3, and the curved sealing device 2 is arranged on the crankshaft 7 in an interference fit mode. The curved path sealing device 2 is provided with a convex piece protruding outwards, a groove is arranged at the position of the end cover 4 corresponding to the convex piece, and a small gap is arranged between the convex piece and the groove. The labyrinth seal 2 is connected to the inner ring of the bearing 3.

The protection level of IP55 is achieved by installing the shaft surface oil seal device 1 outside the motor end cover 4, meanwhile, the bearing 3 at two ends is provided with the curved path seal device 2, the curved path seal device 2 is connected with the inner ring of the bearing 3 and the crankshaft 7, and along with the rotation of the crankshaft 7, a capillary phenomenon is generated at a fine gap formed by the curved path seal, so that the penetration of an inner cavity and an outer cavity is cut off, and the protection level of IP66 is achieved.

The beneficial effects of the utility model are that:

the utility model discloses a set up axial plane oil blanket device in the motor end cover outside, set up curved path sealing device again in both ends bearing department simultaneously, structural change is simple, and the incremental cost is not many, simple to operate, the maintenance is simple, and the wall axle that moreover can be fine link up the passageway of the inside and outside cavity of department, improves protection level.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. A sealing structure of an explosion-proof motor is characterized by comprising a crankshaft (7), a rotor (6) arranged on the crankshaft (7) in an interference fit mode, a bearing (3) sleeved on the crankshaft (7), a machine base (5), end covers (4) arranged at two ends of the machine base (5) and a sealing device, wherein the sealing device comprises a shaft surface oil sealing device (1) and a curved sealing device (2); the shaft surface oil sealing device (1) is arranged outside the end cover (4), the curved sealing device (2) is arranged inside the end cover (4) and outside the bearing (3), and the shaft surface oil sealing device (1) and the curved sealing device (2) jointly play a role in sealing protection.

2. A sealing structure of an explosion-proof machine according to claim 1, characterized in that the bearing (3) comprises an inner ring and an outer ring, the inner ring of the bearing (3) is sleeved on the machine shaft (7) in an interference fit manner, and the outer ring is installed on the end cover (4).

3. A sealing structure of explosion-proof electric machine according to claim 2, characterized in that the end covers (4) are fixedly mounted at both ends of the base (5) by screws.

4. A sealing arrangement of an explosion-proof electric machine according to claim 3, characterized in that the labyrinth seal (2) is mounted on the machine shaft (7) by interference fit.

5. A sealing structure of an explosion-proof motor according to claim 4, characterized in that the labyrinth seal device (2) is provided with a lug protruding outwards, a groove is arranged at the position of the end cover (4) corresponding to the lug, a gap is arranged between the lug and the groove, and the labyrinth seal device (2) is connected with the inner ring of the bearing (3).