Motor-operated compressor

Abstract

A motor-operated compressor includes: a fixed scroll; an orbiting scroll engaged with the fixed scroll to perform an orbiting motion and forming a pair of compression chambers together with the fixed scroll during the orbiting motion; a frame provided opposite to the fixed scroll with the orbiting scroll interposed therebetween, and forming a back pressure chamber so as to axially support the orbiting scroll; and a rotation shaft coupled to the frame and the orbiting scroll in a penetrating manner. The rotation shaft is supported by the frame in a first axial direction and rotatably coupled to the fixed scroll, and an elastic member is disposed between the fixed scroll and the rotation shaft to support the rotation shaft in a second axial direction opposite to the first axial direction with respect to the first scroll.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2018-0087383, filed on Jul. 26, 2018, the contents of which is incorporated by reference herein in its entirety.BACKGROUND OF THE DISCLOSURE1. Field of the Disclosure[0002]The present disclosure relates to a motor-operated compressor.2. Description of the Related Art[0003]Generally, compressors for compressing a refrigerant in automotive air conditioning systems have been developed in various forms. Recently, motor-operated compressors driven by electric power using motors have been actively developed according to the tendency of electricization of electric parts of vehicles.[0004]A motor-operated compressor mainly employs a scroll compression method suitable for a high compression ratio operation among various compression methods. In the scroll type motor-operated compressor, a motor unit configured...

AI Technical Summary

Benefits of technology

The present patent provides a solution for reducing vibrations of a rotation shaft in a compressor, which increases the stability of the compressor's operation and maintains a sealing state. It also prevents leakage in the compressor by stabilizing the behavior of the rotation shaft at the beginning of operation. The motor-operated compressor enhances the sealing force of the thrust surface by axially and radially supporting the rotation shaft, and stabilizes axial movement or behavior of the rotation shaft by elastically supporting it in an axial direction. These technical effects improve the performance and efficiency of the compressor.

Problems solved by technology

However, in such a shaft-through scroll structure, the rotation shaft is not axially supported, thereby increasing axial vibrations of the rotation shaft.

This causes a refrigerant and oil forming back pressure to leak to an outside of the back pressure chamber through a contact surface between the frame and the rotation shaft.

Particularly, when a specific level or amount of the back pressure is not generated at the beginning of operation of the compressor, behavior of the rotation shaft becomes unstable.

Thus, pressure generation in the compression chamber is delayed.

Images