CN217713359U

CN217713359U - Radial protection bearing for magnetic suspension motor and protection bearing group

Info

Publication number: CN217713359U
Application number: CN202221065772.XU
Authority: CN
Inventors: 吴波; 李伟
Original assignee: Luoyang Zhongyue Precision Bearing Co ltd
Current assignee: Luoyang Zhongyue Precision Bearing Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-11-01
Anticipated expiration: 2032-05-06

Abstract

A radial protection bearing for a magnetic suspension motor and a protection bearing set are provided, wherein the radial protection bearing comprises an outer ring, an inner ring matched with the outer ring and a rolling body arranged between the outer ring and the inner ring, the rolling body is made of silicon nitride, an inner groove coating is arranged at the position of the inner ring for contacting the rolling body, outer groove coatings are arranged at the positions of the outer ring for contacting the rolling body, and the inner groove coating and the outer groove coating are molybdenum disulfide coatings; the protective bearing group comprises two radial protective bearings which are arranged in parallel. The utility model discloses a radial protection bearing is when using, and the condition of rotor unstability or magnetic bearing power failure appears when magnetic suspension motor, and the cooperation of silicon nitride rolling element and interior ditch coating and outer ditch coating, the rotor that the bearing falls when reaching high-speed pivoted in the twinkling of an eye, effectively prevents the bearing sintering to can normally protect magnetic suspension motor.

Description

Radial protection bearing for magnetic suspension motor and protection bearing group

Technical Field

The utility model relates to a bearing technical field, concretely relates to magnetic suspension motor is with radial protection bearing and protection bearing group.

Background

Magnetic levitation has the advantages of no abrasion, no pollution, low power consumption, low noise, high efficiency, no need of lubrication and sealing for long-term use in vacuum and corrosive media and the like because of no mechanical contact, and is applied to the special high-speed operation field. The structure of high-speed magnetic suspension motor is complicated, and is expensive, in case the condition of rotor unstability or magnetic bearing power loss appears, the rotor falls under the hypervelocity state, can pound to the stator under the impact force effect, cause the magnetic bearing to damage and the motor to scrap, traditional bearing is when being used for protecting the radial magnetic bearing of magnetic suspension motor, when the rotor falls under the hypervelocity state, traditional bearing is bearing big acceleration, the hypervelocity, during the condition such as high temperature in the twinkling of an eye, easily receive the impact damage, can't effectively protect the magnetic suspension motor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-speed magnetic suspension motor is with radial protection bearing and protection bearing group to solve the problem that traditional bearing can't effectively protect high-speed magnetic suspension motor.

The utility model discloses a reach the technical scheme that above-mentioned purpose adopted and be:

the utility model provides a magnetic suspension motor is with radial protection bearing, includes the outer lane, with the inner circle of outer lane adaptation and set up the rolling element between outer lane and inner circle, the material of rolling element is the silicon nitride, and the inner circle is used for contacting rolling element department and is equipped with the inner groove coating, and the outer lane is used for contacting rolling element department and all is equipped with the outer ditch coating, and the inner groove coating is the molybdenum disulfide coating with the outer ditch coating.

As an optimized scheme of the utility model, the internal diameter surface of inner circle is equipped with the internal diameter coating, and the internal diameter coating is the molybdenum disulfide coating.

As an optimized proposal of the utility model, the inner diameter coating is arranged around the inner diameter of the inner ring for a circle.

As an optimal scheme of the utility model, the rolling element is silicon nitride ceramic ball, be equipped with between outer lane and the inner circle with the channel of rolling element adaptation, interior ditch coating and outer ditch coating all set up in the channel.

As an optimized proposal of the utility model, the ball filling holes which are convenient for taking and placing the rolling bodies in the channel are arranged on the outer ring and the inner ring.

As a preferred scheme of the utility model, be equipped with the half hole in outer lane that communicates the channel setting on the outer lane, circle in and be equipped with the intercommunication channel setting, be used for forming jointly with half hole in outer lane fill up half hole in inner circle in ball hole.

As an optimized proposal of the utility model, the outer ring and the inner ring are both made of high-strength steel.

A protective bearing group for a magnetic suspension motor comprises two radial protective bearings which are arranged in parallel and used for the magnetic suspension motor in any scheme.

As an optimal solution of the present invention, two radial protection bearings are provided with an axial gap.

The utility model discloses beneficial effect:

1. the utility model discloses magnetic suspension motor is with radial protection bearing's inner circle is used for contacting rolling element department and is equipped with the interior ditch coating, the outer lane is used for contacting rolling element department and all is equipped with the outer ditch coating, interior ditch coating is the molybdenum disulfide coating with the outer ditch coating, during the use, the condition that rotor unstability or magnetic bearing power loss appear when magnetic suspension motor, silicon nitride rolling element and interior ditch coating and outer ditch coating cooperation, the rotor that the bearing falls, when reaching high-speed pivoted in the twinkling of an eye, effectively prevent the bearing sintering to can normally protect magnetic suspension motor.

2. The utility model discloses magnetic suspension motor is with radial protection bearing's inner circle internal diameter surface still can be equipped with the internal diameter coating, and the internal diameter coating is the molybdenum disulfide coating, during the use, when the condition of rotor unstability or magnetic bearing power loss appears, the rotor falls to the protection bearing under the hypervelocity state on, the internal diameter coating can prevent effectively that magnetic suspension motor magnetic axis from gluing with the dead eye sintering even to make the bearing play normal guard action.

Drawings

FIG. 1 is a schematic structural diagram of a radial protection bearing for a magnetic levitation motor according to an embodiment;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along A-A in FIG. 1;

fig. 3 is a schematic structural diagram of a protective bearing set for a magnetic levitation motor according to an embodiment.

The mark in the figure is: 1. the inner ring comprises an outer ring, 2, an inner ring, 3, a rolling body, 4, a ball filling hole, 401, an outer ring half hole, 402, an inner ring half hole, 6, an inner groove coating, 7, an outer groove coating and 8, an inner diameter coating.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, wherein in the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a magnetic suspension motor is with concrete embodiment of radial protection bearing:

referring to fig. 1 and 2, the radial protection bearing for a magnetic levitation motor of the present embodiment includes an outer ring 1, an inner ring 2, and rolling elements 3, that is, the protection bearing has no retainer, and when the conventional bearing with the retainer is used for protecting a magnetic levitation motor, the retainer is easily damaged by impact force caused by a rotor falling at an ultra high speed, so that the protection function of the bearing fails.

Wherein, inner circle 2 and outer lane 1 adaptation, outer lane 1 nestification is on inner circle 2 promptly, rolling element 3 sets up between outer lane 1 and inner circle 2, the structure setting of this part promptly can be the same with the setting of traditional no holder bearing, in order to protect magnetic suspension motor better when using, wherein, the material of rolling element 3 adopts silicon nitride, in order to guarantee its intensity requirement, inner circle 2 is used for contacting rolling element 3 department and is equipped with inner groove coating 6, outer lane 1 is used for contacting rolling element 3 department all to be equipped with outer ditch coating 7, inner groove coating 6 and outer ditch coating 7 are the molybdenum disulfide coating, this molybdenum disulfide coating, the molybdenum disulfideCoating accessible sputtering's mode sets up on inner circle 2 and outer lane 1, when using, appears rotor unstability or the condition of magnetic bearing outage when magnetic suspension motor, and the rotor falls to the protection bearing under the hypervelocity state on, and silicon nitride rolling element 3 plays solid lubrication with interior ditch coating 6 and outer ditch coating 7 cooperation, and the rotor that the bearing falls in reaching high-speed pivoted in the twinkling of an eye, effectively prevents the bearing sintering, and the speed factor is up to 2x10, and the condition that the rotor unstability or the magnetic bearing loses electricity appears, and the rotor that the rotor falls⁷The bearing is suitable for the high-speed running of the motor, so that the bearing can normally protect the magnetic suspension motor.

In order to better match the protection effect of the silicon nitride rolling element 3, the inner groove coating 6 and the outer groove coating 7, in this embodiment, both the inner ring 2 and the outer ring 1 can be made of high-strength steel, so as to further improve the capability of protecting the bearing against impact force.

Referring to fig. 2, the rolling element 3 is a silicon nitride ceramic ball, a channel adapted to the rolling element 3 is provided between the outer ring 1 and the inner ring 2, when the channel is provided, a first hemispherical recess may be provided on an inner surface of the outer ring 1, a second hemispherical recess is provided on an outer surface of the inner ring 2, when the inner ring 2 is used in cooperation with the outer ring 1, the first hemispherical recess and the second hemispherical recess form a channel for placing the silicon nitride ceramic ball, the inner groove coating 6 and the outer groove coating 7 are both provided in the channel, for example, the inner groove coating 6 is provided on an inner surface of the second hemispherical recess, and the outer groove coating 7 is provided on an inner surface of the first hemispherical recess.

Referring to fig. 1 and 2, ball filling holes 4 are formed in the outer ring 1 and the inner ring 2, the ball filling holes 4 are convenient for taking and placing the rolling elements 3 into and out of the channels, when the ball filling holes 4 are specifically arranged, an outer ring half hole 401 can be formed in the outer ring 1, the outer ring half hole 401 is communicated with the channels, and the inner ring 2 is provided with the outer ring half hole 401

And when the outer ring 1 and the inner ring 2 are matched for use, the inner ring half hole 402 and the outer ring half hole 401 together form the ball filling hole 4.

In other embodiments, in addition to the arrangement of the inner groove coating 6 and the outer groove coating 7 in the groove, the inner diameter surface of the inner ring 2 may be further provided with an inner diameter coating 8, wherein the inner diameter surface of the inner ring 2 refers to the inner surface of the inner ring 2, the inner diameter coating 8 is also a molybdenum disulfide coating, the molybdenum disulfide coating may be disposed on the inner surface of the inner ring 2 by coating, the inner diameter coating 8 is preferably disposed around the inner diameter of the inner ring 2 for one circle, and in use, when a rotor is unstable or the magnetic bearing is de-energized, the rotor falls onto the protection bearing at an ultra-high speed state, and the inner diameter coating 8 may effectively prevent the magnetic shaft of the magnetic levitation motor from sintering and adhering to the bearing hole, so that the bearing plays a normal protection role.

The utility model also provides a magnetic suspension motor is with concrete embodiment of protection bearing group:

with reference to fig. 3, the protection bearing set for a magnetic suspension motor in this embodiment includes two radial protection bearings for a magnetic suspension motor in the above embodiments, the two radial protection bearings for a magnetic suspension motor are arranged in parallel, and when the two radial protection bearings are specifically arranged, the two radial protection bearings may be combined back to form a bearing set.

When the axial magnetic bearing is used for protecting the axial magnetic bearing, an axial gap can be arranged between two radial protective bearings in a bearing set, for example, as shown in fig. 3, outer ring end faces of the two radial protective bearings abut against each other, inner ring end faces of the two radial protective bearings respectively retract into the bearing body relative to the outer ring end faces, that is, the outer ring end faces extend out by a certain distance, and after the outer ring end faces of the two radial protective bearings abut against each other, the axial gap delta is formed between the inner ring end faces of the two radial protective bearings, and the axial gap delta can reduce the possibility of cracking of the ceramic ball rolling bodies 3 due to the fact that the ceramic ball rolling bodies are squeezed together when the bearing set is started at a high speed and runs at a high speed.

It should be noted that the detailed description is not the prior art, and the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the present invention.

Claims

1. The utility model provides a magnetic suspension motor is with radial protection bearing, includes outer lane (1), with inner circle (2) of outer lane (1) adaptation and set up rolling element (3) between outer lane (1) and inner circle (2), its characterized in that: the rolling element (3) is made of silicon nitride, an inner groove coating (6) is arranged at the position where the inner ring (2) is used for being in contact with the rolling element (3), outer groove coatings (7) are arranged at the positions where the outer ring (1) is used for being in contact with the rolling element (3), and the inner groove coating (6) and the outer groove coatings (7) are molybdenum disulfide coatings.

2. A radial protection bearing for a magnetic levitation motor as claimed in claim 1, characterized in that the inner diameter surface of the inner ring (2) is provided with an inner diameter coating (8), the inner diameter coating (8) being a molybdenum disulphide coating.

3. A radial protection bearing for a magnetic levitation motor as claimed in claim 2, characterized in that the inner diameter coating (8) is arranged around the inner diameter of the inner ring (2).

4. A radial protection bearing for a magnetic levitation motor as claimed in any of claims 1 to 3, characterized in that the rolling elements (3) are silicon nitride ceramic balls, a channel adapted to the rolling elements (3) is provided between the outer ring (1) and the inner ring (2), and an inner groove coating (6) and an outer groove coating (7) are provided in the channel.

5. A radial protection bearing for a magnetic levitation motor as claimed in claim 4, characterized in that the outer ring (1) and the inner ring (2) are provided with ball-filling holes (4) for facilitating the removal of the rolling bodies (3) into the channel.

6. A radial protection bearing for a magnetic levitation motor as claimed in claim 5, characterized in that the outer ring (1) is provided with outer ring half holes (401) communicating with the raceway arrangement, and the inner ring (2) is provided with inner ring half holes (402) communicating with the raceway arrangement for forming said ball-filling holes (4) together with the outer ring half holes (401).

7. Radial protection bearing for a magnetic levitation motor as claimed in claim 1, characterized in that the outer ring (1) and the inner ring (2) are made of high strength steel.

8. A protective bearing group for a magnetic levitation motor, comprising two radial protective bearings for a magnetic levitation motor according to any one of claims 1-7 arranged in parallel.

9. A protective bearing pack for a magnetic levitation motor as claimed in claim 8, wherein two radial protective bearings are provided with an axial gap.