Protective bearing assembly and compressor

By designing a protective bearing assembly in a magnetic levitation bearing system with an inner and outer ring spaced apart and connected by a damping structure, the problem of easy damage to the protective bearing when the high-speed rotor falls is solved, and effective impact absorption and improved impact resistance are achieved.

CN224515704UActive Publication Date: 2026-07-17CHONGQING MIDEA GENERAL REFRIGERATING EQUIP CO LTD +1
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP CO LTD
Filing Date
2025-07-31
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In magnetic levitation bearing systems, the protective bearing is susceptible to damage from impact when the high-speed rotor falls. Traditional rigid mounting structures cannot effectively buffer and disperse the impact force, leading to bearing deformation or breakage, affecting equipment safety and increasing maintenance costs.

Method used

The protective bearing assembly is designed with an inner and outer ring arranged at intervals and connected by a damping structure. The damping structure absorbs the impact force, avoids direct impact damage, and improves the impact resistance.

Benefits of technology

It effectively absorbs the impact force when the rotor falls, prevents damage to the protective bearing, reduces the risk of equipment damage, and improves system safety and reliability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224515704U_ABST
    Figure CN224515704U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of magnetic suspension bearing system, concretely puts forward a kind of protection bearing assembly and compressor.The protection bearing assembly includes protection bearing body, bearing seat and damping structure, bearing seat includes the inner ring and outer ring of interval arrangement along the radial direction of protection bearing body, outer ring ring is located in the outer of inner ring, and the outer circumferential surface of inner ring and the inner circumferential surface of outer ring are formed with mounting space, protection bearing body is embedded in the inner wall of inner ring, damping structure is located in mounting space, and inner ring and outer ring are connected by damping structure.It can be understood that the recess of the circumferential outer wall of inner ring and the recess of the circumferential inner wall of outer ring can be formed by surrounding, a limiting slot can be provided on the circumferential outer wall of inner ring, and the mounting space can be formed by surrounding between the limiting slot and the circumferential inner wall of outer ring.The mounting space can also be the space formed by surrounding between the circumferential outer wall of inner ring and the circumferential inner wall of outer ring.
Need to check novelty before this filing date? Find Prior Art

Claims

1. A protected bearing assembly characterized by, include: A protective bearing body, the protective bearing body including a through hole for the rotor to pass through; A bearing housing, comprising an inner ring and an outer ring, wherein the outer ring is disposed outside the inner ring, and an installation space is formed between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring, and the protective bearing body is embedded in the inner ring; A damping structure is provided within the installation space, and the inner ring and the outer ring are connected through the damping structure.

2. The protected bearing assembly of claim 1, wherein, The outer circumferential wall of the inner ring is provided with a limiting groove, and the limiting groove and the inner circumferential wall of the outer ring together form the installation space.

3. The protected bearing assembly of claim 2, wherein, The damping structure is a sealing ring, the limiting groove is an annular groove, and the sealing ring is disposed in the annular groove and abuts against the bottom wall of the annular groove and the circumferential inner wall of the outer ring, respectively.

4. The protected bearing assembly of claim 3, wherein, The sealing ring is cut radially to form a cross section, which is circular, elliptical or polygonal.

5. The protected bearing assembly of claim 1, wherein, The damping structure is a tolerance ring, which is located within the installation space.

6. The protected bearing assembly of claim 1, wherein, There are multiple installation spaces, which are arranged sequentially at intervals, and each installation space contains a damping structure.

7. The protected bearing assembly of claim 6, wherein, The plurality of installation spaces are spaced apart along the axial direction of the protective bearing body.

8. The protected bearing assembly of any of claims 1 to 7, wherein, The inner ring is interference-fitted with the protective bearing body, and the total interference ranges from 0.01 mm to 0.02 mm.

9. The protected bearing assembly of any of claims 1 to 7, wherein, The inner ring and the outer ring are fitted with a clearance, and the value of the clearance on one side ranges from 0.01 mm to 0.03 mm.

10. A compressor characterized by, include: The protective bearing assembly according to any one of claims 1 to 9; A bearing positioning plate is attached to one side of the protective bearing assembly along the axial direction of the protective bearing assembly. A wheel back seal is attached to the other side of the protective bearing assembly.