CN215634426U

CN215634426U - Magnetic suspension bearing, compressor and air conditioner

Info

Publication number: CN215634426U
Application number: CN202122313238.8U
Authority: CN
Inventors: 陈艳霞; 龚高; 张超; 王飞; 董如昊
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-01-25
Anticipated expiration: 2031-09-23

Abstract

The application provides a magnetic suspension bearing, a compressor and an air conditioner. The magnetic suspension bearing comprises a rotating shaft (1) and a thrust disc (2) arranged at a first end of the rotating shaft (1), wherein axial bearings (3) are arranged at two ends of the thrust disc (2) respectively, the thrust disc (2) is sleeved outside the rotating shaft (1), a shaft hole of the thrust disc (2) comprises a first internal thread section (4) and a second internal thread section (5), the rotating shaft (1) is provided with an external thread (6), and the thrust disc (2) is in threaded connection with the external thread (6) of the rotating shaft (1) through the first internal thread section (4) and the second internal thread section (5). According to the magnetic suspension bearing, the thrust disc can be effectively locked, looseness of the thrust disc is avoided, and stability of the thrust disc is improved.

Description

Magnetic suspension bearing, compressor and air conditioner

Technical Field

The application relates to the technical field of magnetic suspension, in particular to a magnetic suspension bearing, a compressor and an air conditioner.

Background

Compared with the traditional rolling bearing and sliding bearing, the magnetic suspension bearing suspends the rotating shaft by utilizing the electromagnetic force to the rotor, and the rotating shaft and the stator are kept in a non-contact state, so that the magnetic suspension bearing has the advantages of no abrasion, high rotating speed, high precision, long service life and the like. However, the magnetic suspension axial bearing realizes the axial movement of the rotating shaft, and the rotating shaft is essentially required to be provided with an axial stressed component, namely a thrust disc, so that the thrust disc and the rotating shaft are integrated, and the movement of the thrust disc needs to drive the rotating shaft to move, so that the thrust disc is fastened on the rotating shaft and cannot be loosened.

The thrust disc wraps the end of a rotating shaft, threads are arranged on an inner ring of the thrust disc and are matched with the rotating shaft, the axial direction and the rotating shaft are reinforced by bolts, and the thrust disc needs to be matched with the bolts when the thrust disc is screwed during assembly, so that the thrust disc can not be locked easily.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a magnetic suspension bearing, compressor and air conditioner, can guarantee that the thrust dish is effectively locked, avoids the thrust dish to take place not hard up, improves the stability of thrust dish.

In order to solve the problem, the application provides a magnetic suspension bearing, including pivot and the thrust disc of setting in the first end of pivot, the both ends of thrust disc are provided with axial bearing respectively, and the thrust disc cover is established outside the pivot, and the shaft hole of thrust disc includes first internal thread section and second internal thread section, and the pivot has the external screw thread, and the thrust disc is through the external screw thread spiro union of first internal thread section and second internal thread section with the pivot.

Preferably, the thrust disc comprises a main body and a locking portion, the locking portion being located axially outwardly of the main body, the first internally threaded section being located on the main body and the second internally threaded section being located on the locking portion.

Preferably, the main body and the locking part are integrally formed, an inner annular groove is formed between the main body and the locking part and is located between the first inner thread section and the second inner thread section, locking threaded holes are formed in the main body and the locking part, locking bolts are arranged in the locking threaded holes, and the locking bolts penetrate through the inner annular groove.

Preferably, an outer circumferential groove is formed in an outer circumferential wall of the locking portion, and the locking bolt passes through the outer circumferential groove.

Preferably, the main body and the locking part are of a split structure, and the locking part is pressed against the main body.

Preferably, the thread directions of the first internal thread section and the second internal thread section are opposite, and the diameter of the first internal thread section is larger than that of the second internal thread section.

Preferably, the main body and the locking part are provided with locking threaded holes, and locking bolts are arranged in the locking threaded holes.

Preferably, the rotating shaft comprises a shaft shoulder, a groove is formed in one side, facing the shaft shoulder, of the thrust disc, and the shaft shoulder is installed in the groove.

Preferably, coils are arranged in the axial bearing, and an operation through hole is arranged on the thrust disc and is positioned between the coils at the two ends.

Preferably, the number of the operation through holes is 3 to 6, and the operation through holes are uniformly arranged along the circumferential direction of the thrust disc.

According to another aspect of the present application, there is provided a compressor comprising a magnetic bearing, which is the above-mentioned magnetic bearing.

According to another aspect of the present application, there is provided an air conditioner comprising a magnetic suspension bearing, which is the above magnetic suspension bearing.

The application provides a magnetic suspension bearing, including pivot and the thrust disc of setting in the first end of pivot, the both ends of thrust disc are provided with axial bearing respectively, and the thrust disc cover is established outside the pivot, and the shaft hole of thrust disc includes first internal thread section and second internal thread section, and the pivot has the external screw thread, and the thrust disc is through the external screw thread spiro union of first internal thread section and second internal thread section with the pivot. This magnetic suspension bearing's thrust disc adopts the external screw-thread fit of two internal thread sections and pivot for the thrust disc can utilize the external screw-thread fit of two internal thread sections on the thrust disc and pivot after accomplishing the installation, thereby increases the area of contact of thrust disc and pivot, makes the difficult axial float that takes place of thrust disc, guarantees that the thrust disc effectively locks, avoids the thrust disc to take place not hard up, improves the stability of thrust disc.

Drawings

FIG. 1 is a schematic perspective cross-sectional view of a magnetic suspension bearing according to an embodiment of the present application;

FIG. 2 is a schematic perspective view of a magnetic suspension bearing according to an embodiment of the present application;

fig. 3 is a schematic cross-sectional structure diagram of a magnetic suspension bearing according to an embodiment of the present application.

The reference numerals are represented as:

1. a rotating shaft; 2. a thrust disc; 3. an axial bearing; 4. a first internal thread segment; 5. a second internal thread segment; 6. an external thread; 7. a main body; 8. a locking portion; 9. an inner annular groove; 10. an outer annular groove; 11. locking the threaded hole; 12. locking the bolt; 13. a shaft shoulder; 14. a groove; 15. a coil; 16. the through hole is operated.

Detailed Description

Referring to fig. 1 to 3 in combination, according to an embodiment of the present application, the magnetic suspension bearing includes a rotating shaft 1 and a thrust disc 2 disposed at a first end of the rotating shaft 1, axial bearings 3 are disposed at two ends of the thrust disc 2 respectively, the thrust disc 2 is sleeved outside the rotating shaft 1, a shaft hole of the thrust disc 2 includes a first internal thread section 4 and a second internal thread section 5, the rotating shaft 1 has an external thread 6, and the thrust disc 2 is screwed with the external thread 6 of the rotating shaft 1 through the first internal thread section 4 and the second internal thread section 5.

This magnetic suspension bearing's thrust disc 2 adopts the external screw-thread fit of two internal thread sections and pivot 1 for thrust disc 2 can utilize two internal thread sections on the thrust disc 2 and the external screw-thread fit of pivot 1 after accomplishing the installation, thereby increase thrust disc 2 and pivot 1's area of contact, make thrust disc 2 difficult emergence axial float, guarantee thrust disc 2 effective locking, avoid thrust disc 2 to take place not hard up, improve thrust disc 2's stability.

The direction of the force applied to the external thread 6 by the first internal thread section 4 of the thrust disc 2 is opposite to the direction of the force applied to the external thread 6 by the second internal thread section 5.

In this embodiment, the effort direction that the external screw thread 6 was applyed to first internal thread section 4 of thrust dish 2 is applyed with the effort opposite direction that external screw thread 6 was applyed to second internal thread section 5, can utilize the not equidirectional effort that first internal thread section 4 and second internal thread section 5 were applyed to realize the auto-lock of thrust dish 2, reach the axial and force the purpose of fastening thrust dish 2, thereby effectively reduced the not hard up of thrust dish 2, the stability of thrust dish 2 has been guaranteed, and then the reliability of magnetic suspension bearing has been improved, can effectively stop the damage of axial bearing 3 and pivot 1, the trouble that has reduced the magnetic suspension compressor returns the package rate.

In addition, because the thrust disc 2 and the rotating shaft 1 are in a structure fixed by thread fit, a hot-assembling structure is not needed, the safety of workers is guaranteed, and the installation and the disassembly are easier.

The thrust disc 2 of the embodiment of the application is completely sleeved outside the rotating shaft 1, and the part outside the shaft end of the rotating shaft 1 is not arranged, so that the instability of the rotating shaft 1 in operation is reduced.

In one embodiment, the thrust disc 2 comprises a main body 7 and a locking portion 8, the locking portion 8 being located axially outside the main body 7, the first internal thread section 4 being located on the main body 7 and the second internal thread section 5 being located on the locking portion 8.

In this embodiment, through the mode that falls into two parts with thrust disc 2 for first internal thread section 4 and second internal thread section 5 are located the part of difference respectively, are convenient for operate thrust disc 2 more, conveniently utilize the interact of different parts, realize the interact of both ends internal thread section to external screw thread 6, realize thrust disc 2's auto-lock locking, place thrust disc 2's not hard up.

In one embodiment, the main body 7 and the locking portion 8 are integrally formed, an inner annular groove 9 is formed between the main body 7 and the locking portion 8, the inner annular groove 9 is located between the first inner thread section 4 and the second inner thread section 5, locking threaded holes 11 are formed in the main body 7 and the locking portion 8, locking bolts 12 are arranged in the locking threaded holes 11, and the locking bolts 12 penetrate through the inner annular groove 9.

In this embodiment, main part 7 and 8 formula structures as an organic whole of locking part, in order to realize that first internal thread section 4 and second internal thread section 5 exert the difference of effort direction to external screw thread 6, set up interior annular groove 9 between first internal thread section 4 and second internal thread section 5, utilize the interior circle axial gap that interior annular groove 9 formed, can be under the prerequisite of guaranteeing radial assembly firm, reduce the assembly and dismantle the degree of difficulty.

When carrying out thrust disc 2's assembly, can utilize first internal thread section 4 and second internal thread section 5 to screw thrust disc 2 at first, then the screw-thread fit effect through locking bolt 12, utilize the elasticity of thrust disc 2 and the clearance axial fastening screw thread that the inner ring groove 9 formed, because of all can there be certain clearance between the screw thread of cooperation, second internal thread section 5 will axial displacement during screw locking, thereby support the external screw thread 6 on the pivot 1, when second internal thread section 5 supports tight external screw thread 6 towards the right side, first internal thread section 4 also can be under the elastic action of thrust disc 2, support tight external screw thread 6 towards the left side, thereby make first internal thread section 4 and second internal thread section 5 exert the effort of equidirectional respectively to external screw thread 6, thereby reach the axial fastening effect.

The main body 7 and the locking part 8 are of an integrated structure, so that the consistency of the assembly and disassembly of the thrust disc 2 can be improved.

In one embodiment, the outer circumferential wall of the locking part 8 is provided with an outer circumferential groove 10, and the locking bolt 12 passes through the outer circumferential groove 10. In the present embodiment, by adding the outer annular groove 10, the deformation capability of the thrust disc 2 can be further improved, so that the self-locking capability of the first internal thread section 4 and the second internal thread section 5 during interaction can be more effectively ensured.

The thrust disc 2 in the embodiment is of an integral structure, two threads are designed on the inner ring, and two gaps are reserved, so that self-locking is facilitated, repeated assembly and disassembly are facilitated, the phenomenon that interference magnitude disappears in the environment of eccentricity and thermal expansion at a high rotating speed can be avoided, and the thrust disc 2 is prevented from being axially loosened to damage an axial bearing.

In one embodiment, the main body 7 and the locking portion 8 are of a split structure, and the locking portion 8 presses against the main body 7. In this embodiment, after the main body 7 needs to be installed in place, the locking portion 8 can press against the main body 7, and the first internal thread section 4 and the second internal thread section 5 respectively apply acting forces in different directions to the external thread 6 by using the pressing acting force, so as to achieve the axial fastening effect.

In one embodiment, the thread directions of the first internal thread section 4 and the second internal thread section 5 are opposite, and the diameter of the first internal thread section 4 is larger than the diameter of the second internal thread section 5. In this embodiment, locking portion 8 supports the condition of pressing main part 7, because the screw thread of first internal thread section 4 and second internal thread section 5 is turned to opposite, consequently when first internal thread section 4 and second internal thread section 5 take place the pine and take off, both pine takes off opposite direction, can make main part 7 support tight locking portion 8 at the pine in-process that takes off for locking portion 8 can't rotate to the pine direction of taking off, consequently makes both lock each other, effectively prevents that thrust disc 2 from taking place the pine phenomenon.

In one embodiment, the body 7 and the locking portion 8 are provided with locking threaded holes 11, and locking bolts 12 are provided in the locking threaded holes 11. When the screw thread turning directions of the first internal thread section 4 and the second internal thread section 5 are opposite, the main body 7 and the locking part 8 are locked together through the locking bolt 12, and the two are the same in the rotating directions, one is loosened and the other is locked, so that the two cannot rotate, and the thrust disc 2 can be effectively prevented from being loosened.

In this embodiment, because the thread turning directions of the first internal thread section 4 and the second internal thread section 5 are opposite, in order to ensure the cooperation with the rotating shaft 1, the external thread 6 of the rotating shaft 1 also needs to be divided into two parts with opposite turning directions, wherein the first part is matched with the first internal thread section 4, the second part is matched with the second internal thread section 5, in order to ensure the smooth installation of the first internal thread section 4, the shaft section diameter of the second part needs to be smaller than that of the first part, and the blockage caused by the screwing-in of the first internal thread section 4 is avoided.

In one embodiment, the shaft 1 comprises a shoulder 13, and the side of the thrust disc 2 facing the shoulder 13 is provided with a groove 14, and the shoulder 13 is mounted in the groove 14. In this embodiment, through the cooperation of shaft shoulder 13 and recess 14, can conveniently fix a position thrust disc 2's mounted position when thrust disc 2 installs, reduce the installation degree of difficulty, improve the installation effectiveness.

In one embodiment, coils 15 are provided in the axial bearing 3, and an operation through hole 16 is provided in the thrust disk 2, the operation through hole 16 being located between the coils 15 at both ends of the thrust disk 2.

In one embodiment, the number of the operation through holes 16 is 3 to 6, and the operation through holes 16 are uniformly arranged in the circumferential direction of the thrust disk 2. The operation through hole 16 is, for example, a threaded hole.

When the number of operation through-hole 16 is 2, the quantity is too little, and the thrust dish is difficult to lock, and when the number of operation through-hole 16 exceeded 6, can influence thrust dish structural stability. The operating through holes 16 are located at positions between the two coils 15 and are circumferentially and uniformly distributed, which may result in a poor stressed position of the thrust disc 2 if located radially inside the coils 15, and may result in a poor stressed tightening of the thrust disc 2 by the operating through holes 16 if located radially outside the coils 15.

In the magnetic suspension bearing of the embodiment of the application, the axial bearings 3 are positioned at two ends of the thrust disc 2, and the assembly gaps at the two ends are equal. Two sections of internal threads are designed on the inner circle of the thrust disc 2 and are matched with the external threads 6 on the rotating shaft 1, so that the contact area between the thrust disc 2 and the rotating shaft 1 is increased, the thrust disc is not easy to axially move, and the stability of the thrust disc is ensured.

During assembly, firstly, the tool is screwed into the operation through hole 16 in the thrust disc 2, the thrust disc 2 is fixed and screwed into the rotating shaft, one side of the thrust disc 2, which is provided with the groove 14, is conveniently matched with the shaft shoulder 13 in the rotating shaft in a positioning mode, six locking threaded holes 11 are designed in the circumference of the thrust disc 2 on the other side, the thrust disc 2 with two sections of threads is communicated, six locking bolts 12 are adopted during assembly, and the second inner thread section 5 is axially locked by utilizing certain elasticity of the thrust disc 2 due to the fact that two sections of gaps are reserved, so that the thrust disc 2 is axially and doubly fastened.

During disassembly, the locking bolt 12 is loosened by torque, the fastening fulcrum of the second internal thread section 5 is loosened, the second axial locking is released, and then the thrust disc 2 is screwed out by using the three operation through holes 16 on the thrust disc 2.

According to an embodiment of the present application, the compressor comprises a magnetic bearing, which is the above-mentioned magnetic bearing.

According to an embodiment of the present application, the air conditioner includes a magnetic bearing, which is the above-mentioned magnetic bearing.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. The utility model provides a magnetic suspension bearing, its characterized in that is in including pivot (1) and setting the thrust dish (2) of pivot (1) first end, the both ends of thrust dish (2) are provided with axial bearing (3) respectively, thrust dish (2) cover is established outside pivot (1), the shaft hole of thrust dish (2) includes first internal thread section (4) and second internal thread section (5), pivot (1) has external screw thread (6), thrust dish (2) are passed through first internal thread section (4) and second internal thread section (5) with external screw thread (6) spiro union of pivot (1).

2. Magnetic bearing according to claim 1, characterized in that the thrust disc (2) comprises a main body (7) and a locking portion (8), the locking portion (8) being located axially outside the main body (7), the first internal thread section (4) being located on the main body (7), the second internal thread section (5) being located on the locking portion (8).

3. Magnetic suspension bearing according to claim 2, characterized in that the main body (7) and the locking portion (8) are integrally formed, an inner annular groove (9) is provided between the main body (7) and the locking portion (8), the inner annular groove (9) is located between the first inner thread section (4) and the second inner thread section (5), locking threaded holes (11) are provided on the main body (7) and the locking portion (8), locking bolts (12) are provided in the locking threaded holes (11), and the locking bolts (12) pass through the inner annular groove (9).

4. Magnetic bearing according to claim 3, characterized in that the outer circumferential wall of the locking portion (8) is provided with an outer annular groove (10), the locking bolt (12) passing through the outer annular groove (10).

5. Magnetic bearing according to claim 2, characterized in that the body (7) and the locking portion (8) are of a split construction, the locking portion (8) pressing against the body (7).

6. Magnetic suspension bearing according to claim 2, characterized in that the thread directions of the first internal thread section (4) and the second internal thread section (5) are opposite, the diameter of the first internal thread section (4) being larger than the diameter of the second internal thread section (5).

7. Magnetic bearing according to claim 5 or 6, characterized in that the main body (7) and the locking part (8) are provided with locking threaded holes (11), and locking bolts (12) are provided in the locking threaded holes (11).

8. Magnetic bearing according to claim 1, characterized in that the shaft (1) comprises a shoulder (13), the thrust disc (2) being provided with a groove (14) on the side facing the shoulder (13), the shoulder (13) being mounted in the groove (14).

9. Magnetic bearing according to claim 1, characterized in that coils (15) are arranged in the axial bearing (3) and that an operating through hole (16) is arranged in the thrust disc (2), said operating through hole (16) being located between the coils (15) at both ends of the thrust disc (2).

10. Magnetic bearing according to claim 9, characterized in that the number of the operating through holes (16) is 3 to 6, the operating through holes (16) being evenly arranged in the circumferential direction of the thrust disc (2).

11. A compressor, characterized by comprising a magnetic bearing as claimed in any one of claims 1 to 10.

12. An air conditioner, characterized in that, comprises a magnetic suspension bearing, wherein the magnetic suspension bearing is the magnetic suspension bearing of any one of claims 1 to 10.