CN212751991U

CN212751991U - Small-power three-phase frequency conversion synchronous motor bearing anti-electric corrosion structure

Info

Publication number: CN212751991U
Application number: CN202021622802.3U
Authority: CN
Inventors: 李江澎; 马吉英
Original assignee: Changzhou Honest Electric Co ltd
Current assignee: Changzhou Honest Electric Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-03-19
Anticipated expiration: 2030-08-07

Abstract

The utility model relates to a miniwatt three-phase frequency conversion synchronous machine bearing prevents electric erosion structure belongs to motor protective structure technical field. Including pivot, rotor and end cover, the rotor is fixed to be cup jointed on the pivot surface, the rotatable bearing that has cup jointed in bottom of pivot, the bearing is deep groove ball bearing, the bearing nylon insulation cover has been cup jointed on the outer lane surface of bearing, the end cover bottom surface is equipped with the recess that is used for the joint bearing, the bearing joint is fixed in the recess of end cover bottom surface, still be equipped with a wave spring between bearing top and the end cover bottom surface recess. The utility model discloses a miniwatt three-phase frequency conversion synchronous machine bearing anti-electricity erosion structure makes the unable insulating cover that punctures of axle voltage through increasing the insulating cover of nylon in deep groove ball bearing outer lane, can not produce the electric current, avoids bearing electroerosion to produce the recess, and then prevents that the friction from producing the noise, and the condition that leads to the bearing inefficacy produces, has wide application prospect.

Description

Small-power three-phase frequency conversion synchronous motor bearing anti-electric corrosion structure

Technical Field

The utility model relates to a miniwatt three-phase frequency conversion synchronous machine bearing prevents electric erosion structure belongs to motor protective structure technical field.

Background

At present, a low-power three-phase variable frequency synchronous motor is widely applied to various occasions such as various textile machines, automatic office supplies, automatic industrial production equipment and the like; the bearing is a core component for supporting the rotating output power of the rotating shaft. The bearing used by the common low-power three-phase variable frequency synchronous motor is a deep groove ball bearing, and in order to reduce the cost, the bearing is not specially processed; a ceramic ball bearing with good protection performance but high price is not adopted; the low-power three-phase variable frequency synchronous motor is powered by a PWM variable frequency power supply, and the driving mode can cause voltage to be generated at two ends of the motor; once the shaft voltage exceeds a certain value, the bearing oil film is broken down, and then discharge is generated to form current; the energy released by the partial discharge can generate high temperature; forming electric erosion grooves on the surfaces of the inner ring raceway, the outer ring raceway and the balls of the bearing; thereby increasing friction to generate noise and accelerating bearing failure. Bringing adverse effects to consumers.

In view of the above-mentioned defects, the present designer actively makes research and innovation to create an anti-electrical erosion structure for the bearing of the low-power three-phase variable frequency synchronous motor, so that the bearing has industrial utility value.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides an anti-electric corrosion structure for a small power three-phase variable frequency synchronous motor bearing. The utility model discloses a miniwatt three-phase frequency conversion synchronous machine bearing anti-electricity erosion structure makes the unable insulating cover that punctures of axle voltage through increasing the insulating cover of nylon in deep groove ball bearing outer lane, can not produce the electric current, avoids bearing electroerosion to produce the recess, and then prevents that the friction from producing the noise, and the condition that leads to the bearing inefficacy produces, has wide application prospect.

The utility model relates to an electric corrosion prevention structure of a small-power three-phase variable frequency synchronous motor bearing, which comprises a rotating shaft, a rotor and an end cover,

the bottom of pivot is rotatable has cup jointed the bearing, the outer lane surface of bearing has cup jointed the insulating cover of bearing nylon, the bearing joint is fixed in the recess of end cover bottom surface.

Further, the rotor is fixedly sleeved on the surface of the rotating shaft.

Further, the bearing is a deep groove ball bearing.

Furthermore, the bottom surface of the end cover is provided with a groove for clamping the bearing.

Furthermore, a wave spring is arranged between the top end of the bearing and the groove on the bottom surface of the end cover.

By the scheme, the invention at least has the following advantages:

the utility model discloses a miniwatt three-phase frequency conversion synchronous machine bearing anti-electricity erosion structure makes the unable insulating cover that punctures of axle voltage through increasing the insulating cover of nylon in deep groove ball bearing outer lane, can not produce the electric current, avoids bearing electroerosion to produce the recess, and then prevents that the friction from producing the noise, and the condition that leads to the bearing inefficacy produces, has wide application prospect.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented in accordance with the content of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an electric corrosion prevention structure of a small-power three-phase variable frequency synchronous motor bearing of the present invention;

wherein, in the figure;

1. a rotating shaft; 2. a rotor; 3. an end cap; 4. a bearing; 5. a nylon insulating sleeve of the bearing; 6. a wave spring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1, the anti-electric corrosion structure for the bearing of the small-power three-phase variable frequency synchronous motor according to a preferred embodiment of the present invention comprises a rotating shaft 1, a rotor 2 and an end cover 3,

rotor 2 is fixed cup joints at 1 surface of pivot, the rotatable bearing 4 that has cup jointed in the bottom of pivot 1, bearing 4 is deep groove ball bearing, bearing nylon insulation cover 5 has been cup jointed on the outer lane surface of bearing 4, 3 bottom surfaces of end cover are equipped with the recess that is used for joint bearing 4, the recess is open-top's cylindrical structure, the depth of groove with bearing 4's highly the same, the bearing 4 joint is fixed in the recess of 3 bottom surfaces of end cover, still be equipped with a wave spring 6 between 4 tops of bearing and the 3 bottom surface recesses of end cover, wave spring 6 edge is fixed by the 5 cladding of bearing nylon insulation cover.

The utility model discloses an equipment process does:

firstly, fixedly sleeving a rotor 2 and a rotating shaft 1, fixedly sleeving a bearing 4 at the bottom end of the rotating shaft 1, placing a wave spring 6 at the bottom end of the bearing 4, sleeving a bearing nylon insulating sleeve 5 on the surface of an outer ring of the bearing 4, coating and fixing the wave spring 6 together by using the bearing nylon insulating sleeve 5, and then clamping and mounting the bearing 4 sleeved with the bearing nylon insulating sleeve 5 into a cylindrical groove at the bottom surface of an end cover 3 to form an electric corrosion prevention structure of the bearing of the low-power three-phase variable frequency synchronous motor;

the utility model discloses an increase the insulating cover of nylon in deep groove ball bearing outer lane, make the insulating cover of unable puncture of axle voltage, can not produce the electric current, avoid bearing galvanic corrosion to produce the recess, and then prevent that the friction from producing the noise, lead to the condition production that the bearing became invalid, have wide application prospect.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a miniwatt three-phase frequency conversion synchronous machine bearing prevents electric erosion structure, includes pivot (1), rotor (2) and end cover (3), its characterized in that:

rotatable the having cup jointed bearing (4) in the bottom of pivot (1), the outer lane surface of bearing (4) has cup jointed bearing nylon insulation cover (5), bearing (4) joint is fixed in the recess of end cover (3) bottom surface.

2. The small-power three-phase variable frequency synchronous motor bearing anti-electric corrosion structure of claim 1, characterized in that: the rotor (2) is fixedly sleeved on the surface of the rotating shaft (1).

3. The small-power three-phase variable frequency synchronous motor bearing anti-electric corrosion structure of claim 1, characterized in that: the bearing (4) is a deep groove ball bearing.

4. The small-power three-phase variable frequency synchronous motor bearing anti-electric corrosion structure of claim 1, characterized in that: the bottom surface of the end cover (3) is provided with a groove used for clamping the bearing (4).

5. The small-power three-phase variable frequency synchronous motor bearing anti-electric corrosion structure of claim 1, characterized in that: and a wave spring (6) is also arranged between the top end of the bearing (4) and the groove on the bottom surface of the end cover (3).