Surging-prevent compressor volute structure for turbocharger

Abstract

A surging-prevent compressor volute for a turbocharger adopts the structure that a tapered air inlet is formed in one end of the air intake passage of the compressor volute; an arc-shaped end matched with the outer contour of an arc-shaped blade of an impeller is arranged at the other end of the air intake passage; a circular flow guiding cavity is formed in the inner wall at the joint edge between the air intake passage and the arc-shaped end. During use, the impeller is mounted at the arc-shaped end of the compressor volute; the front edge end of the main blade of the impeller is arranged in the middle of the circular flow guiding cavity. When air disturbance is transmitted to an impeller inlet along the hub line of the impeller, and reaches the front edge of the main blade of the impeller, part of inlet air enters the flow guiding cavity in the form of a vortex after distorting circumferentially, so that a fluid field distorts to be transferred out of the impeller body, and the disturbance distortion of airflow at the impeller inlet is reduced, and is prevented from being further transmitted into the impeller; the airflow angle of inlet air at the impeller inlet is changed, so as to prevent distortion of the fluid field of the airflow at the air inlet end of a compressor, and enlarge the stable working range of the compressor.

Description

technical field [0001] The invention relates to the technical field of turbochargers, in particular to an anti-surge turbocharger compressor volute structure. Background technique [0002] With the improvement of the performance of the vehicle engine, the working range of the turbocharger also needs to be gradually expanded, but the compressor surge has always been a stumbling block accompanying the development of the compressor performance, which affects the stability of the airflow when the turbocharger is working. If the effective working range of the engine cannot be improved, it will eventually affect the improvement of the working range of the entire engine. The root cause of compressor surge is that the airflow field in the compressor produces local distortion at small flow rates, that is, when the flow rate is too small, the airflow first undergoes a pressure change at the outlet of the impeller, and produces an airflow disturbance at the outlet. The airflow disturb...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a kind of anti-surge turbocharger compressor volute structure, it solves the complicated secondary air intake structure on the existing compressor volute, There are many parts involved, which leads to the increase of the cost of the compressor and the increase of assembly steps

Images