Vortex fluid machinery

Abstract

The scroll fluid machine of the present invention has: a fixed scroll forming a compression chamber, a revolving scroll, a shoulder portion that divides the compression chamber into a front compression chamber and a rear compression chamber, a fixed scroll The top of the coil is a scroll groove provided in a spiral shape, an intermediate groove provided on the shoulder, a seal member, and an intermediate seal member. The shoulder portion has a front-stage discharge port communicating with the front-stage compression chamber and a rear-stage suction port communicating with the rear-stage compression chamber. The wrap grooves include outer wrap grooves adjacent to the shoulder on the radially outer side and inner wrap grooves adjacent to the shoulder on the radial inner side. The middle groove communicates with the outer scroll groove and the inner scroll groove. The seal member is fitted into the wrap grooves other than the outer peripheral scroll groove and the inner peripheral scroll groove. The intermediate seal member has an outer peripheral seal portion fitted into the outer peripheral scroll groove, an inner peripheral seal portion fitted into the inner peripheral scroll groove, and an outer peripheral seal portion and an inner peripheral seal portion fitted into the middle groove and connected to each other. the middle seal.

Description

technical field [0001] The present invention relates to a scroll fluid machine configured to further compress fluid compressed in a front-stage compression section in a rear-stage compression section. Background technique [0002] Conventionally, for example, in the scroll fluid machine described in Japanese Patent Application Laid-Open No. 2003-129970, a scroll-shaped orbiting scroll provided on the orbiting scroll and a scroll-shaped scroll provided on the fixed scroll The fixed scrolls mesh with each other and orbit the orbiting scroll, thereby taking in fluid from a radially outer suction port. The fluid is compressed by gradually reducing the compression space into which the fluid is taken in toward the center. The compressed fluid is discharged from the discharge port on the center side. In this scroll fluid machine, the compression chamber is divided into two stages: a radially outer front stage compression chamber and a radially inner rear stage compression chamber...

AI Technical Summary

Problems solved by technology

However, since the approximately middle portion in the longitudinal direction of the first sealing member is fitted into the middle groove in a bent state and divides between the front-stage discharge port and the rear-stage suction port, there is a possibility that the middle portion of the first sealing member will not Evenly pushed against the mirror surface of the orbiting scroll by the pressure of the compressed fluid

Therefore, the compressed fluid leaks from the rear stage compression chamber to the front stage compression chamber through the pushed lower pressure part

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