Scroll refrigerating compressor

Abstract

The invention discloses a scroll refrigerating compressor. More than three backing rings are fixedly arranged between the upper end face of an upper support and a high-low-pressure partitioning plate, a through hole is formed in a fixed scroll, the backing rings pass through the through hole in the fixed scroll, the upper surface of a fixed scroll backing plate is lower than the upper end faces of the backing rings, two annular grooves are formed in the fixed scroll backing plate, sealing rings are placed in the annular grooves, a backpressure cavity is formed among the upper surface of the fixed scroll backing plate, the lower end face of the high-low-pressure partitioning plate and the two sealing rings and is communicated with a compression cavity through a gas introducing hole, bolts penetrate through the high-low-pressure partitioning plate and through holes of the backing rings to be screwed in bolt holes of the upper support, and the high-low-pressure partitioning plate, the backing rings and the upper support are fixed together. The scroll refrigerating compressor has the beneficial effects that through reasonably designing the sizes of the backing rings, the upper support and the fixed scroll, a reasonable gap can be obtained between the high-low-pressure partitioning plate and the fixed scroll, the ideal pre-deformation of the sealing rings is promoted to be generated, and the backpressure cavity is sealed.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, in particular to a scroll refrigeration compressor. Background technique [0002] A technical problem of the scroll compressor is to reduce the leakage of the addendum. In order to solve the problem of the addendum leakage, the following technical measures are available in the prior art: fixed scroll floating, movable scroll floating and sealing ring floating. Among them, the disadvantage of the fixed scroll floating method is that the fixed scroll floating structure needs to be equipped with high and low pressure partitions to isolate the high and low pressure chambers. Usually, the high and low pressure partitions are determined by the upper end surface of the shell to determine the axial position. This positioning method has low accuracy. It is not easy to ensure the positional relationship between the two sealing surfaces, and the sealing effect is poor. Contents of the inve...

AI Technical Summary

Problems solved by technology

Among them, the disadvantage of the fixed scroll floating method is that the fixed scroll floating structure needs to be equipped with high and low pressure partitions to isolate the high and low pressure chambers. Usually, the high and low pressure partitions are determined by the upper end surface of the shell to determine the axial position. This positioning method has low accuracy. It is not easy to ensure the positional relationship between the two sealing surfaces, and the sealing effect is poor

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