A kind of compressor and its volute

Abstract

The invention discloses a volute comprising an outer volute in a tubular shape, a first inner volute and a second inner volute. The side of the outer volute is provided with a volute passage outlet. The first inner volute and the second inner volute are mounted on the inner wall of the outer volute and both provided with flow channels; after the first and second inner volutes are hermetically connected, the flow channels are fitted to form a volute passage communicated with the volute passage outlet. The volute comprises the outer volute, the first inner volute and the second inner volute, namely, the volute passage is dissected, and during machining, the three parts are machined separately and reconnected; the volute passage includes two parts, operating a machining tool to perform shot blasting to the inner surface of the volute passage is facilitated, part of the volute is avoided being cut off during machining of the volute, completeness of the volute is guaranteed, the actual size of the volute is more consistent to the theoretical size, and quality of the volute is improved. The volute further discloses a compressor with the volute.

Description

technical field [0001] The present invention relates to the technical field of refrigeration equipment, and more specifically, relates to a compressor and a volute thereof. Background technique [0002] In refrigeration centrifugal compressors, the volute is a structure that collects the diffuser gas and discharges it to the condenser. It is an important part of the static gas components of the centrifugal compressor. Its shape is very similar to a snail shell, so it is called a volute. [0003] The production of the existing volute usually adopts the integral casting method. However, because the flow section of the volute gradually increases from 0° to 360°, the width of the air inlet is very small in the small angle area. In order to facilitate the arrangement of the inner core during casting and shot blast the inner surface after casting to improve the smoothness and reduce the flow loss, at present, a considerable part of the inner surface of the volute is usually cut of...

AI Technical Summary

Problems solved by technology

[0003] The existing volute is often produced in the form of integral casting. However, because the flow section of the volute gradually increases from 0° to 360°, the width of the air inlet is very small in the small angle area.

In order to facilitate the arrangement of the inner core during casting and shot blast the inner surface after casting to improve the smoothness and reduce the flow loss, at present, a considerable part of the inner surface of the volute is usually cut off, which makes the actual shape of the volute Inconsistent with the theoretical shape, this further increases the gap between the actual state of the gas and the theoretical state, and even causes the actual performance of the volute to fail to meet the requirements of the theoretical data, affecting the quality of the volute

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