A Displacement Spiral Design Method of Volute

Abstract

The invention belongs to a design method of a centrifugal compressor volute, in particular to an application of a dislocation spiral design on a volute. The helix is ​​used as the connection line of each section center of the volute, and is expanded along the circumference of the volute; the volute is divided into 8 to 12 section positions according to the circumferential direction, and then the centerline of each section is compared with the centerline of the previous section along the axis Offset by 2-5mm to form a structure of a transverse volute tongue; the transverse volute tongue is a method of offsetting the center line of the section of the volute to avoid interference between the volute and the air outlet, and to preserve the initial small section of the volute , to guide the flow and improve efficiency; the preservation of the initial small section of the volute is to cut off the small section from 0° to 10°, which is conducive to improving the flow and reducing the volume of the volute; the air outlet of the volute of the centrifugal compressor It is smoothly connected with the volute designed by the dislocation spiral design method, and the initial profile of the air outlet tube is consistent with the mainstream direction of the gas outlet of the volute, reducing impact loss.

Description

technical field [0001] The invention belongs to a design method of a centrifugal compressor volute, in particular to a dislocation spiral design method of a volute. Background technique [0002] In the design process of centrifugal compressors, in order to pursue a high-efficiency mode, structural optimization and improvement measures are often taken on the volute in order to tap its possible energy-saving potential, thereby improving the overall operating efficiency of the unit. In the design of centrifugal compressors, it is noted that the design of the volute often has certain particularities. Since the air outlet tube eats up a large part of the small section of the volute, this part of the air flow directly enters the outlet tube after flowing out of the diffuser. , so it impacts the main airflow of the air outlet, resulting in a large airflow mixing loss. How to reduce the trouble of air mixing loss is a serious problem encountered by those skilled in the art. [000...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of flow disorder in the air outlet tube in the volute of the centrifugal compressor, the purpose of the present invention is to provide a dislocation spiral design method for the volute

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