Exhaust gas turbocharger pressure shell with bypass flow path

Abstract

The invention belongs to the field of a turbocharger, and particularly relates to an exhaust gas turbocharger pressure shell with a bypass flow path. The exhaust gas turbocharger pressure shell comprises an air inlet and an air outlet, which are formed in a pressure shell body, wherein a plurality of air suction holes are formed in the inner edge of the air inlet, an air supplementing groove is arranged on the hole of the inner end of an inner hole of the air inlet, the inner wall of the outer end of the inner hole of the air inlet is set to be an arc curve surface, one end of each air suction hole penetrates through the arc curve surface to form an air return hole, the other end of each air suction hole is communicated with the air supplementing groove, and the air suction holes, the air return holes and the air supplementing groove form the bypass flow path. The exhaust gas turbocharger pressure shell has advantages that airflow can be circulated in the bypass flow path under the working condition of small flow rate so as to prevent surge, and air can also be sucked from the flow path under the work condition of large flow rate, so that the blockage is postponed; the air inlet smoothness is greatly improved, the squeaking is lowered, and an effect of a silencing housing is realized; the working reliability of the supercharger is improved; the assembling precision, the working efficiency, the corrosion resistance and water and pollution resistance of the turbocharger can be improved.

Description

technical field [0001] The invention belongs to the field of turbochargers, in particular to an exhaust gas turbocharger pressure shell with a bypass channel. Background technique [0002] The rapid development of the automobile industry has brought about increasingly serious environmental pollution and energy shortages. Turbochargers play a decisive role in improving engine performance and energy saving and emission reduction. Under the low flow condition of traditional compressors without bypass passages, severe airflow separation occurs in the internal flow field. This unstable working state will cause the compressor to stall or even surge, which directly leads to a sharp drop in efficiency and pressure ratio. , the service life is seriously shortened, or even directly damaged. However, under high-flow conditions, the intake air volume often fails to meet the requirements, and blocking delays occur, which also leads to a reduction in the working efficiency of the compre...

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problems of surge phenomenon under the low-flow working condition of the compressor, airflow blocking phenomenon under the high-flow working condition, poor assembly precision and low efficiency

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