CN219592193U

CN219592193U - Insulating end cover of motor

Info

Publication number: CN219592193U
Application number: CN202122914728.3U
Authority: CN
Inventors: 叶咏; 胡俊峰; 李文龙
Original assignee: Jiangtian Motor Co ltd
Current assignee: Jiangtian Motor Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2023-08-25
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses a motor insulation end cover, which comprises a motor shaft, an end cover body sleeved on the periphery of the motor shaft, a bearing sleeved on the periphery of the end part of the motor shaft, a bearing inner cover arranged in the bearing, a bearing outer cover arranged on the outer side of the bearing, an end cover sleeve arranged on the periphery of the bearing, and a plurality of insulation parts. The utility model can effectively avoid generating shaft current by arranging the insulating part, has simple installation, no damage to the insulating part, no adverse effect on environment and low cost, and damages the motor.

Description

Insulating end cover of motor

Technical Field

The utility model relates to the technical field of motors, in particular to an insulating end cover of a motor.

Background

The motor is very common mechanical equipment in daily life, can convert electric energy into mechanical energy, utilizes an electrified coil to generate a rotating magnetic field and acts on a rotor to form magneto-electric power rotating torque, and mainly comprises a stator and a rotor, wherein the direction of forced movement of an electrified wire in the magnetic field is related to the current direction and the magnetic induction line direction, and the working principle of the motor is that the magnetic field acts on the current to enable the motor to rotate. When the motor powered by the frequency converter works, the pulse voltage is strong in impact due to high harmonic content of the frequency converter, so that the motor shaft is easy to generate shaft voltage, and shaft current is formed. When shaft current passes through the bearing roller and the inner ring, discharge pits can be formed, so that the temperature of the bearing is increased or vibration is increased, the bearing is damaged, and the safe operation of the generator is affected. Therefore, in a motor employing a frequency converter, insulation measures must be taken to prevent damage to the shaft current.

The existing motor insulation measures mostly adopt a motor ceramic coating method to prevent the damage of motor shaft current, and have a plurality of defects: the ceramic coating is brittle, and the ceramic coating is easy to damage when the bearing is installed and replaced; the ceramic plating process has influence on the environment; the cost is high.

Disclosure of Invention

The utility model aims to provide the motor insulating end cover, which has reliable insulation, no damage to insulating parts in the installation process and no adverse effect on the environment, and the end cover structure can be realized by adopting the original end cover casting, so that the cost of the inner sleeve of the end cover is low, and the processing cost is almost the same as that of a standard end cover.

The utility model provides a motor insulation end cover, includes that the motor shaft is established with the cover the end cover body of motor shaft periphery, the end cover body is established at the bearing of motor shaft end portion periphery including the cover, sets up the bearing inner cup of survey in the bearing and sets up the bearing enclosing cover in the bearing outside, sets up the end cover of bearing periphery to and a plurality of insulating parts.

Preferably, the bearing inner cover is arranged in the bearing and sleeved on the periphery of the motor shaft and is connected with the end cover sleeve, the bearing outer cover is arranged outside the bearing and sleeved on the periphery of the motor shaft and is connected with the end cover sleeve.

Preferably, the end cover sleeve comprises an end cover inner sleeve and an end cover outer sleeve, the end cover inner sleeve is tightly attached to the periphery of the bearing, the end cover outer sleeve is arranged on the periphery of the end cover inner sleeve, and a gap is reserved between the end cover inner sleeve and the end cover outer sleeve.

Preferably, the end cover outer sleeve is fixedly connected with the bearing inner cover and the bearing outer cover through bolts.

Preferably, the insulating member includes a bearing inner cap insulating pad, an insulating resin layer, a bearing outer cap insulating pad, and an insulating seal ring.

Preferably, the bearing inner cover insulating pad is arranged between the bearing inner cover and the bearing, and the bearing outer cover insulating pad is arranged between the bearing outer cover and the bearing, so that the effect of isolating currents in the bearing and between the bearing outer cover and the bearing is achieved.

Preferably, the insulating resin layer is arranged between the end cover inner sleeve and the end cover outer sleeve, and plays a role in isolating current between the end cover inner sleeve and the end cover outer sleeve.

Preferably, the insulating resin layer is formed by impregnating an insulating resin into a gap between the inner cover and the outer cover.

Preferably, the insulating sealing ring is arranged between the bearing outer cover and the motor shaft, and meanwhile, the insulating sealing ring is also arranged between the bearing inner cover and the motor shaft, so that the currents between the bearing inner cover and the motor shaft and the current between the bearing outer cover and the motor shaft are isolated.

The utility model has the following advantages:

the utility model can effectively avoid generating shaft current by arranging the insulating part, has simple installation, no damage to the insulating part, no adverse effect on environment and low cost, and damages the motor.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

The figure indicates: 1. a motor shaft; 2. a bearing inner cover; 3. an insulating pad of the bearing inner cover; 4. a bearing; 5. an end cap inner sleeve; 6. an insulating resin layer; 7. an end cover jacket; 8. an insulating pad of the bearing outer cover; 9. a bolt; 10. a bearing outer cover; 11. and an insulating sealing ring.

Detailed Description

For a better understanding of the objects, structure and function of the present utility model, a motor insulation end cap according to the present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides an insulating end cover of a motor, which comprises a motor shaft 1, an end cover body sleeved on the periphery of the motor shaft 1, a bearing 4 sleeved on the periphery of the end part of the motor shaft 1, an inner bearing cover 2 arranged in the bearing 4, an outer bearing cover 10 arranged outside the bearing 4, an end cover sleeve arranged on the periphery of the bearing 4, and a plurality of insulating parts.

The bearing inner cover 2 is arranged in the bearing 4 and sleeved on the periphery of the motor shaft 1 and is connected with the end cover sleeve, and the bearing outer cover 10 is arranged outside the bearing 4 and sleeved on the periphery of the motor shaft 1 and is connected with the end cover sleeve.

The end cover sleeve comprises an end cover inner sleeve 5 and an end cover outer sleeve 7, the end cover inner sleeve 5 is tightly sleeved on the periphery of the bearing 4 by clinging to the bearing 4, the end cover outer sleeve 7 is arranged on the periphery of the end cover inner sleeve 5, a gap is reserved between the end cover inner sleeve 5 and the end cover outer sleeve 7, and the end cover outer sleeve 7 is fixedly connected with the bearing inner cover 2 and the bearing outer cover 10 through bolts 9.

The insulating member includes a bearing inner cover insulating pad 3, an insulating resin layer 6, a bearing outer cover insulating pad 8, and an insulating seal ring 11. The bearing inner cover insulating pad 3 is arranged between the bearing inner cover 2 and the bearing 4, and the bearing outer cover insulating pad 8 is arranged between the bearing outer cover 10 and the bearing 4, so that the effect of isolating current in the bearing and between the outer cover and the bearing is achieved. The insulating resin layer 6 is arranged between the end cover inner sleeve 5 and the end cover outer sleeve 7, is formed by pouring insulating resin into a gap between the end cover inner sleeve 5 and the end cover outer sleeve 7, and plays a role in isolating current between the end cover inner sleeve 5 and the end cover outer sleeve 7. The insulating sealing ring 11 is arranged between the bearing outer cover 10 and the motor shaft 1, and meanwhile, the insulating sealing ring is also arranged between the bearing inner cover 2 and the motor shaft 1, so that the currents between the bearing inner cover and the motor shaft 1 and the currents between the bearing outer cover and the motor shaft 1 are isolated.

The end cover outer sleeve 7, the bearing inner cover 2 and the bearing outer cover 10 are made into one conductor through the arrangement of the insulating component, and the motor shaft 1, the bearing 4 and the end cover inner sleeve 5 are made into the other conductor, and the two conductors are insulated, so that the generation of shaft current is effectively avoided, and the damage to the motor is caused.

The beneficial effects of the utility model are as follows:

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The motor insulation end cover is characterized by comprising a motor shaft (1) and an end cover body sleeved on the periphery of the motor shaft (1), wherein the end cover body comprises a bearing (4) sleeved on the periphery of the end part of the motor shaft (1), a bearing inner cover (2) arranged in the bearing (4) and a bearing outer cover (10) arranged on the outer side of the bearing (4), an end cover sleeve arranged on the periphery of the bearing (4) and a plurality of insulation parts; the insulating part comprises a bearing inner cover insulating pad (3), an insulating resin layer (6), a bearing outer cover insulating pad (8) and an insulating sealing ring (11); the bearing inner cover insulating pad (3) is arranged between the bearing inner cover (2) and the bearing (4), and the bearing outer cover insulating pad (8) is arranged between the bearing outer cover (10) and the bearing (4) to isolate the current in the bearing and between the outer cover and the bearing.

2. The motor insulation end cover according to claim 1, wherein the bearing inner cover (2) is arranged in the bearing (4) and sleeved on the periphery of the motor shaft (1) to be connected with the end cover sleeve, and the bearing outer cover (10) is arranged outside the bearing (4) and sleeved on the periphery of the motor shaft (1) to be connected with the end cover sleeve.

3. The motor insulation end cover according to claim 1, wherein the end cover sleeve comprises an end cover inner sleeve (5) and an end cover outer sleeve (7), the end cover inner sleeve (5) is tightly sleeved on the periphery of the bearing (4) by clinging to the bearing (4), the end cover outer sleeve (7) is arranged on the periphery of the end cover inner sleeve (5), and a gap is reserved between the end cover inner sleeve (5) and the end cover outer sleeve (7).

4. A motor insulation end cap according to claim 3, characterized in that the end cap outer sleeve (7) is fixedly connected with the bearing inner cap (2) and the bearing outer cap (10) by means of bolts (9).

5. An insulating end cover for an electric motor according to claim 1, characterized in that the insulating resin layer (6) is arranged between the end cover inner sleeve (5) and the end cover outer sleeve (7) and serves to insulate the electric current between the end cover inner sleeve (5) and the end cover outer sleeve (7).

6. An electric motor insulation end cap according to claim 5, characterized in that the insulating resin layer (6) is formed by impregnating insulating resin into the gap between the inner cap sleeve (5) and the outer cap sleeve (7).

7. A motor insulation end cap according to claim 6, characterized in that the insulation sealing ring (11) is mounted between the bearing outer cap (10) and the motor shaft (1), while the insulation sealing ring is also mounted between the bearing inner cap (2) and the motor shaft (1), so that the current between the bearing inner and outer caps and the motor shaft (1) is interrupted.