CN209818535U - Magnetic suspension motor auxiliary bearing structure - Google Patents

Abstract

The utility model provides an auxiliary bearing structure for a magnetic levitation motor, comprising bearing inner rings, balls, bearing isolation rings and protection structures distributed sequentially from the inner ring to the outer ring, wherein the bearing inner rings adopt a split structure arranged side by side , two rings of the balls are arranged side by side between the inner ring of the bearing and the spacer ring of the bearing. The auxiliary bearing structure of the magnetic levitation motor provided by the utility model adopts a split inner ring structure, and there is no cage filled with beads, which can increase the supporting force and evenly share the impact force when the rotor falls; the damping and shock absorbing sleeve made of spring steel is adopted, It can reduce the vibration when the rotor falls, and effectively increase the damping, shorten the deceleration time when the rotor falls, reduce the damage probability of the protective bearing, and prolong the service life of the magnetic levitation motor.

Description

A magnetic levitation motor auxiliary bearing structure

technical field

The utility model relates to the technical field of magnetic levitation motors, in particular to an auxiliary bearing structure of a magnetic levitation motor.

Background technique

With the development of science and technology and the demand of production, magnetic levitation high-speed motor has become one of the hot spots in the field of international electrotechnical research. Due to the advantages of high energy density, small structural size, and high efficiency, the magnetic levitation high-speed motor has been widely used in industrial fields such as micro gas turbines, high-speed centrifugal compressors, molecular pumps, high-speed machining centers, and flywheel energy storage, and its application fields are still in development. growing.

The magnetic levitation motor rotates at high speed during the working process. If the control fails and suddenly falls during this process, it will cause devastating damage to the motor.

Utility model content

In view of the above problems, the utility model aims to solve the problems described above. An object of the present utility model is to provide an auxiliary bearing structure for a magnetic levitation motor that solves the above problems. Specifically, the utility model provides an auxiliary bearing structure of a magnetic levitation motor capable of ensuring efficient and stable operation of the motor.

In order to solve the above-mentioned technical problems, the utility model provides an auxiliary bearing structure for a magnetic levitation motor. The auxiliary bearing structure for a magnetic levitation motor includes bearing inner rings, balls, bearing isolation rings and protection structures distributed sequentially from the inner ring to the outer ring, wherein , the inner ring of the bearing adopts a split structure arranged side by side, and two rings of the balls are arranged side by side between the inner ring of the bearing and the spacer ring of the bearing.

Wherein, the bearing inner ring includes a first inner ring and a second inner ring that are structurally symmetrical and butted against each other, and the outer ring surface of the bearing inner ring is provided with a U-shaped groove.

Wherein, the middle part of the inner ring surface of the bearing isolation ring is provided with a protrusion, and the two circles of the balls are respectively located on both sides of the protrusion.

Wherein, the balls in the two circles are all arranged with full balls.

Wherein, the protection structure includes a damping and shock absorbing sleeve and a protective outer ring, wherein the damping and shock absorbing sleeve is sleeved on the outer surface of the bearing isolation ring, and the protective outer ring is sleeved on the outer surface of the damping and shock absorbing sleeve surface.

Wherein, the damping and shock absorbing sleeve is made of spring steel.

Wherein, the damping and shock absorbing sleeve is a V-shaped ring structure.

The auxiliary bearing structure of the magnetic levitation motor provided by the utility model adopts a split inner ring structure, and there is no cage filled with beads, which can increase the supporting force and evenly share the impact force when the rotor falls; the damping and shock absorbing sleeve made of spring steel is adopted, It can reduce the vibration when the rotor falls, and effectively increase the damping, shorten the deceleration time when the rotor falls, reduce the damage probability of the protective bearing, and prolong the service life of the magnetic levitation motor.

Other characteristic features and advantages of the present invention will become apparent from the following description of exemplary embodiments read with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention. In the drawings, like reference numerals are used to denote like elements. The accompanying drawings in the following description are some embodiments of the present utility model, but not all embodiments. Those skilled in the art can obtain other drawings based on these drawings without creative efforts.

Fig. 1 exemplarily shows the structure diagram of the auxiliary bearing structure of the magnetic levitation motor of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

The basic idea of the utility model is that the inventor adopts a split-type bearing inner ring structure, and fills it with balls without a cage to increase the supporting force, evenly share the impact force when the rotor falls, and reduce the probability of ball damage; set The damping and shock absorbing sleeve further buffers and absorbs the impact force caused by the falling of the rotor, ensuring that the bearing will not be damaged by the falling rotor, prolonging the service life of the bearing and ensuring the service life of the magnetic levitation motor; at the same time, the damping and shock absorbing sleeve The setting can increase friction and increase damping, effectively shorten the deceleration time when the rotor falls, ensure the operation performance of the magnetic levitation motor, ensure the stable and maintenance-free operation of the motor, and prolong the service life of the magnetic levitation motor.

The auxiliary bearing structure of the magnetic levitation motor provided by the utility model will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows a structural schematic diagram of a specific embodiment of the auxiliary bearing structure of the magnetic levitation motor of the present invention. Referring to Fig. 1, the auxiliary bearing structure of the magnetic levitation motor includes bearing inner rings 1 distributed sequentially from the inner ring to the outer ring , ball 2, bearing isolation ring 3 and protective structure 4. Wherein, the bearing inner ring 1 adopts a split structure arranged side by side, and two rings of balls 2 are arranged side by side between the bearing inner ring 1 and the bearing isolation ring 3 .

In the embodiment shown in FIG. 1 , the bearing inner ring 1 includes a first inner ring 11 and a second inner ring 12 that are structurally symmetrical and butted against each other, and a U-shaped groove 10 is provided in the middle of the outer ring surface of the bearing inner ring 1 , that is, a U-shaped groove 10 is provided at the junction of the first inner ring 11 and the second inner ring 12 . Two rings of balls 2 are distributed in the U-shaped groove 10 , and the balls 2 are limited by the U-shaped groove 10 .

Further, a protrusion 30 is provided in the middle of the inner ring surface of the bearing isolation ring 3 , and the two rings of balls 2 are respectively located on both sides of the protrusion 30 . The U-shaped groove 10 cooperates with the protrusion 30 to separate and limit the two circles of balls 2, so as to ensure that the force of the balls is dispersed and uniform, and the performance and smooth operation of the bearing structure are ensured.

Specifically, the two rings of balls 2 are arranged full of balls, without a cage structure, and are only limited by U-shaped grooves 10 and protrusions 30 .

In the embodiment shown in FIG. 1 , the protection structure 4 includes a damping and shock absorbing sleeve 41 and a protective outer ring 42 , wherein the damping and shock absorbing sleeve 41 is sleeved on the outer surface of the bearing isolation ring 3 to prevent the impact caused by the rotor falling. For buffering and shock absorption; the protective outer ring 42 is set on the outer surface of the damping and shock absorbing sleeve 41 to protect the overall auxiliary bearing structure and also protect the damping and shock absorbing sleeve 41 .

In order to ensure the strength, wear resistance and service life of the protective structure 4 while ensuring the shock absorption performance, the damping and shock absorbing sleeve 41 can be made of spring steel and processed by a stamping process. Exemplarily, the damping and shock absorbing sleeve 41 may be a V-shaped annular structure, or may be stamped into other annular structures with shock-absorbing effect, so as to ensure the stability of the auxiliary bearing structure.

The content described above can be implemented independently or combined in various ways, and these variants are all within the protection scope of the present utility model.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Moreover, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that an article or device comprising a set of elements includes not only those elements but also other elements not expressly listed, Or also include elements inherent in the article or device. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the article or device comprising said element.

The above embodiments are only used to illustrate the technical solutions of the present utility model without limitation, and the present utility model is described in detail with reference to preferred embodiments. Those skilled in the art should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the utility model, and all should be covered by the claims of the utility model.

Claims (7)

1. A magnetic levitation motor auxiliary bearing structure, characterized in that, the magnetic levitation motor auxiliary bearing structure comprises a bearing inner ring (1), a ball (2), a bearing spacer ring (3) and The protection structure (4), wherein, the bearing inner ring (1) adopts a split structure arranged side by side, and two rings of the bearing inner ring (1) and the bearing isolation ring (3) are arranged side by side. Balls (2). 2. The magnetic levitation motor auxiliary bearing structure according to claim 1, characterized in that, the bearing inner ring (1) includes a first inner ring (11) and a second inner ring (12) that are structurally symmetrical and butted against each other , the outer ring surface of the bearing inner ring (1) is provided with a U-shaped groove (10). 3. The magnetic levitation motor auxiliary bearing structure according to claim 1, characterized in that, a protrusion (30) is provided on the inner ring surface of the bearing spacer (3), and two circles of the balls (2) are located respectively The two sides of the protrusion (30). 4. The magnetic levitation motor auxiliary bearing structure according to claim 1, characterized in that, the balls (2) in the two circles are all arranged full of balls. 5. The magnetic levitation motor auxiliary bearing structure according to claim 1, characterized in that, the protection structure (4) comprises a damping and shock absorbing sleeve (41) and a protective outer ring (42), wherein the damping and shock absorbing sleeve (41) is sleeved on the outer surface of the bearing isolation ring (3), and the protective outer ring (42) is sleeved on the outer surface of the damping shock absorbing sleeve (41). 6. The auxiliary bearing structure of the magnetic levitation motor according to claim 5, characterized in that, the damping and shock absorbing sleeve (41) is made of spring steel. 7. The magnetic levitation motor auxiliary bearing structure according to claim 5, characterized in that, the damping and shock absorbing sleeve (41) is a V-shaped ring structure.