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CN-224233480-U - Motor assembly structure for compressor, bearing and compressor

CN224233480UCN 224233480 UCN224233480 UCN 224233480UCN-224233480-U

Abstract

The embodiment discloses a motor assembly structure, a bearing and a compressor for the compressor, wherein the motor assembly structure comprises a shell, a motor is arranged in the shell, a motor rotor is fixedly connected with an eccentric shaft, a third bearing, a first bearing and a second bearing are sequentially arranged around the motor rotor from top to bottom, the first bearing is sleeved on the middle of the eccentric shaft, the second bearing is sleeved on the lower portion of the eccentric shaft, the third bearing is sleeved on the upper portion of the eccentric shaft, and the third bearing is connected with the shell. The third bearing is sleeved outside the motor rotor to form a new support for the eccentric shaft, when the lateral bending of the eccentric shaft exceeds a certain range, the eccentric shaft is limited and supported, and the friction fault of the motor is avoided, so that the reliability of the compressor in high-rotating-speed operation is ensured, meanwhile, the third bearing is connected with the shell, the stability of the fixing of the third bearing is ensured, and the fault of the motor caused by friction failure is avoided.

Inventors

  • QI YONGSHENG
  • LI LI
  • SUN MIN

Assignees

  • 西安庆安制冷设备股份有限公司

Dates

Publication Date
20260512
Application Date
20250527

Claims (10)

  1. 1. The motor assembly structure for the compressor is characterized by comprising a shell (9), wherein a motor (2) is arranged in the shell (9), and a third bearing (1), a first bearing (3) and a second bearing (4) are sequentially arranged around the motor (2) from top to bottom; The first bearing (3) is sleeved in the middle of the eccentric shaft, the second bearing (4) is sleeved in the lower part of the eccentric shaft, the third bearing (1) is sleeved in the upper part of the eccentric shaft, and the third bearing (1) is connected with the shell (9).
  2. 2. Motor assembly structure for compressors according to claim 1, characterized by the fact that said third bearing (1) is connected to the shell (9) by means of a bracket (6).
  3. 3. Motor assembly structure for compressors according to claim 2, characterized by the fact that the bracket (6) is welded to the shell (9) and the bracket (6) is connected to the third bearing (1) by means of bolts (8).
  4. 4. Motor assembly structure for compressors according to claim 2, characterized in that said brackets (6) are circumferentially distributed in number.
  5. 5. Motor assembly structure for compressors according to claim 4, characterized in that said brackets (6) are circumferentially distributed with four.
  6. 6. A motor assembly structure for compressors according to claim 2, characterized in that the area of the cross section of the bracket (6) is smaller than the area of the trimmed cross section of the motor stator to be assembled.
  7. 7. A bearing for an assembly structure according to claim 1, characterized by comprising a third bearing body (5), said third bearing body (5) being provided with a threaded hole for connection to a housing (9); the middle part of the third bearing body (5) is provided with a connecting shaft hole, and the axial height of the connecting shaft hole is larger than that of the third bearing body (5); The connecting shaft hole is assembled with the eccentric shaft.
  8. 8. A bearing according to claim 7, characterized in that a bushing (7) is arranged in the connecting shaft bore.
  9. 9. A bearing according to claim 8, characterized in that the bushing (7) is an interference fit with the connecting shaft bore.
  10. 10. A compressor comprising the mounting structure of any one of claims 1-6.

Description

Motor assembly structure for compressor, bearing and compressor Technical Field The utility model belongs to the technical field of compressor assembly, and relates to a motor assembly structure for a compressor, a bearing and the compressor. Background For a large-displacement rotor compressor, an eccentric shaft fixed by a motor rotor belongs to a cantilever structure. When the compressor is operated at a high rotational speed, the motor is prone to failure due to frictional failure due to the large lateral bending of the shaft caused by the large centrifugal force of the motor rotor. However, the existing assembly mode of the motor inside the compressor has limited constraint on the motor rotor, and cannot meet the requirement of the large-displacement compressor. Disclosure of utility model The utility model aims to solve the problems that in the prior art, the centrifugal force of a motor rotor is large, so that the lateral bending of a shaft is large, and the motor is easy to fail due to friction failure. In order to achieve the purpose, the utility model is realized by adopting the following technical scheme: The motor assembly structure for the compressor comprises a shell, wherein a motor is arranged in the shell, and a third bearing, a first bearing and a second bearing are sequentially arranged around the motor from top to bottom; The first bearing is sleeved on the middle part of the eccentric shaft, the second bearing is sleeved on the lower part of the eccentric shaft, the third bearing is sleeved on the upper part of the eccentric shaft, and the third bearing is connected with the shell. A further improvement of the utility model is that The third bearing is connected with the shell through a bracket. The support is welded with the shell, and the support is connected with the third bearing through bolts. The support circumference is distributed with a plurality of. Four brackets are circumferentially distributed. The area of the cross section of the bracket is smaller than that of the trimming cross section of the motor stator to be assembled. The bearing comprises a third bearing body, wherein a threaded hole is formed in the third bearing body and is used for being connected with a shell; The middle part of the third bearing body is provided with a connecting shaft hole, and the axial height of the connecting shaft hole is larger than that of the third bearing body; The connecting shaft hole is assembled with the eccentric shaft. And a bushing is arranged in the connecting shaft hole. The bushing is in interference fit with the connecting shaft hole. A compressor comprising the mounting structure of any one of the utility models. Compared with the prior art, the utility model has the following beneficial effects: The utility model discloses a motor assembly structure for a compressor, wherein a third bearing is sleeved on the outer side of a motor rotor to form a new support for an eccentric shaft, when the lateral bending of the eccentric shaft exceeds a certain range, the eccentric shaft is limited and supported, so that the friction fault of the motor is avoided, the reliability of the compressor in high-rotating-speed operation is ensured, meanwhile, the third bearing is connected with a shell, the stability of the fixing of the third bearing is ensured, and the fault of the motor caused by friction failure is avoided. Furthermore, in the utility model, the third bearing is connected with the shell through the bracket, and the bracket is used as a connecting carrier, so that the stability of connection and the flexibility of adjustment are ensured. Furthermore, in the utility model, the support is welded with the shell, so that the connection stability is improved, the support is connected with the third bearing through the bolt, the disassembly of the third bearing is facilitated, and the detachable third bearing body mounting mode is adopted, so that the concentric adjustment difficulty of the third bearing bushing and the eccentric shaft is reduced, and the support effect of the third bearing structure on the eccentric shaft is ensured. Furthermore, in the utility model, a plurality of brackets are circumferentially distributed, so that the stability of connection is ensured. The utility model discloses a bearing, wherein a connecting shaft hole is formed in the middle of a third bearing body, the axial height of the connecting shaft hole is larger than that of the third bearing body, the connecting shaft hole is assembled with an eccentric shaft of a compressor, lateral bending generated by the eccentric shaft can be restrained better, and when the compressor runs at a high rotating speed, the lateral bending generated by the eccentric shaft due to the centrifugal force of a motor rotor is reduced, so that the failure of the motor due to friction is avoided. Further, in the utility model, the connecting shaft hole is internally provided with the bushing, and when the rotating speed