Scroll wrap profile of liquid-injected scroll compressor

Abstract

The invention relates to a scroll wrap profile of a liquid-injected scroll compressor. Outer profiles of a static scroll wrap and a dynamic scroll wrap are composed of a section of a variable diameter base circle involute, and the inner profiles of the static scroll wrap and the dynamic scroll wrap are composed by smoothly connecting a variable diameter base circle involute at a center part and normal equidistant curves of the variable diameter base circle involute of the outer ring. The scroll wrap refers to a scroll wrap with compression chamber variational meshing clearance and the wall thickness of the scroll wrap changing gradually. The meshing part close to a central air outlet of the compression chamber is provided with the meshing clearance which forms a pressure unloading channel to the air outlet with small clearance internal leakage, so that the problems of surge pressure in the compression chamber or liquid impacting which are produced by incompressible liquid with relatively large spraying volume. The meshing point of a suction cavity formed by the scroll wrap has no meshing clearance, so that the suction cavity is completely isolated from the compression chamber; at the same time, the wall thickness of the scroll wrap changes thinner gradually from the center to the outer ring, so that the central part of the scroll wrap has enough strength; and the wall thickness at the outer ring of the scroll wrap is relatively thin, so that area utilization rate of a scroll plate is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to a scroll profile of a liquid jet scroll compressor. Background technique [0002] Scroll compressors are widely used because of their remarkable advantages of high volumetric efficiency, high reliability and low vibration and noise, and their application scope is gradually expanding. The scroll profile of the scroll compressor has always been its key technology. The types of profiles that can form the scroll include: circular involute, line segment involute, regular polygonal involute, Archimedes spiral, Algebraic spiral, variable-diameter base circle involute and enveloping curve, the spiral teeth formed by it include equal-wall-thickness spiral teeth and variable-wall-thickness spiral teeth. The scroll compressor relies on the meshing between the scroll teeth on the two scrolls to realize the periodic change of the volume and complete the suction, compression a...

AI Technical Summary

Problems solved by technology

Liquid injection scroll compressors have been more and more used and favored in recent years. In the specific occasions of single-stage high compression ratio and special gas compression, in order to further reduce the exhaust temperature, it is necessary to inject more liquid into the compression chamber. Liquid is used to fully cool the compressed gas. In such occasions where there is a large amount of liquid injection, more liquid is often accumulated in the compression chamber of the scroll compressor. When the volume of the compression chamber is reduced to compress the gas , because the liquid is incompressible, it is easy to have a pressure surge or even a liquid hammer problem in individual compression chambers, which seriously affects the safe and reliable operation of the liquid injection scroll compressor

Images