轴系支撑结构及压缩机

Abstract

本实用新型具体涉及一种轴系支撑结构及压缩机，轴系支撑结构包括转轴、第一支撑组件和第二支撑组件，第一支撑组件包括第一径向磁轴承和第二径向磁轴承，沿转轴的轴向，第一径向磁轴承和第二径向磁轴承间隔设置，用于沿转轴的径向对转轴提供支撑力。第二支撑组件设置在第一径向磁轴承和第二径向磁轴承之间，且至少能够沿转轴的径向提供驱使转轴悬浮的支撑力。本实用新型所述的轴系支撑结构，通过设置交替为转轴提供径向支撑的第二支撑组件与第一支撑组件，能够使转轴始终处于悬浮状态，有助于减小保护轴承在工作时因承受较大的压力和摩擦力，而出现磨损和疲劳的情况，从而有效地解决现有的保护轴承容易受损，导致压缩机的维护成本较大的问题。

Claims

1. A shafting support structure, characterized by, include: Shaft; A first support assembly, comprising a first radial magnetic bearing and a second radial magnetic bearing, is spaced apart along the axial direction of the rotating shaft, and is used to provide a supporting force to the rotating shaft along the radial direction of the rotating shaft; A second support assembly is disposed between the first radial magnetic bearing and the second radial magnetic bearing, and the second support assembly is capable of providing a supporting force that drives the rotating shaft to levitate at least in the radial direction of the rotating shaft.

2. The shafting support structure of claim 1, wherein The shaft support structure also includes: An axial magnetic bearing is disposed on the rotating shaft and located on the side of the second radial magnetic bearing opposite to the first radial magnetic bearing.

3. The shafting support structure of claim 2, wherein The second support assembly includes a third radial magnetic bearing and a fourth radial magnetic bearing, which are spaced apart along the axial direction of the shaft and located between the first radial magnetic bearing and the second radial magnetic bearing. The third radial magnetic bearing and the fourth radial magnetic bearing are used to provide support force to the shaft along the radial direction of the shaft.

4. The shafting support structure of claim 3, wherein Along the axial direction of the shaft, the shaft has a first length L1, and there is a first distance D1 between the third radial magnetic bearing and the fourth radial magnetic bearing, wherein 1 / 2L1≥D1≥1 / 4L1.

5. The shafting support structure of claim 3, wherein The first radial magnetic bearing and the third radial magnetic bearing have a second distance D2, the second radial magnetic bearing and the fourth radial magnetic bearing have a third distance D3, and the second radial magnetic bearing and the axial magnetic bearing have a fourth distance D4, wherein D2 < D4 and D3 < D4.

6. The shafting support structure of claim 2, wherein The second support assembly includes a fifth radial magnetic bearing, which is sleeved on the rotating shaft and spaced apart from the rotating shaft along the radial direction of the rotating shaft, and extends along the axial direction of the rotating shaft.

7. The shafting support structure of claim 6, wherein Along the axial direction of the shaft, the shaft has a first length L1, and the fifth radial magnetic bearing has a second length L2, where L2 ≥ 1 / 3 L1.

8. The shafting support structure of claim 2, wherein The second support assembly includes two spaced-apart bearings, which are spaced apart along the axial direction of the shaft. One of the bearings provides a supporting force to the shaft in the radial direction, and the other bearing provides a supporting force to the shaft in both the radial and axial directions.

9. The shafting support structure of any one of claims 1-8, wherein, The shaft support structure also includes a protective bearing, which is sleeved on the rotating shaft and spaced apart from the rotating shaft along the radial direction of the rotating shaft.

10. A compressor characterized by, Includes the shaft support structure as described in any one of claims 1 to 9.

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