Intake air recirculation fittings with ring cavity

Abstract

The invention discloses an air inlet recycling pipe component with annular pipeline cavities. The air inlet recycling pipe component comprises a main pipeline; a first annular pipeline and a second annular pipeline sleeve the outer side of the main pipeline; a first annular pipeline cavity and a second annular pipeline cavity are formed between the first annular pipeline and the main pipeline as well as between the second annular pipeline and the main pipeline; the first annular pipeline is connected with the second annular pipeline through an annular plate; ventilation holes are uniformly formed in the circle of periphery of the annular plate; an annular notch which is communicated with the second annular pipeline cavity is also formed in the side wall of the main pipeline; a recycling air inlet pipe is vertically arranged on the outer side of the first annular pipeline; and the recycling air inlet pipe is communicated with the first annular pipeline cavity. According to the air inlet recycling pipe component, a decompression structure formed by the parallel two-stage annular pipeline cavities is adopted, so that the structure is compact, and airflow loss is reduced while the pressure is reduced; and the phenomenon that after recycling air flows into the main pipeline, the pressure of the recycling air causes adverse influence on the working efficiency of a supercharger compressor impeller and causes turbulent flow influence on the air in the main pipeline is avoided.

Description

Technical field [0001] The invention relates to an intake recirculation pipe fitting with an annular cavity, which belongs to the field of gas recirculation systems. Background technique [0002] The loop pipe assembly is assembled between the mixed gas inlet pipe of the gas engine and the supercharger. It is the last pipe before the supercharger, that is, the mixed gas directly enters the compressor impeller of the supercharger after passing through this pipe. [0003] In the traditional gas engine, the air intake system adopts the form of intake air recirculation, that is, after the mixed gas is supercharged and intercooled, it bypasses a stream of gas to circulate the intake air before the supercharger. The existing recirculation intake pipe is a welded special-shaped three-way pipe, and the intake recirculation gas is directly passed to the front of the supercharger. In this way, the airflow with a certain pressure will flow into the main flow path and hit the supercharger. On...

AI Technical Summary

Problems solved by technology

The existing recirculation intake pipe is a welded special-shaped three-way pipe, and the intake recirculation gas is directly passed to the front of the supercharger, so that the airflow with a certain pressure will flow into the main channel and hit the supercharger. On the impeller of the compressor, the angle and pressure of the airflow entering the impeller will change, so that the guiding effect of the wind guide wheel of the impeller is different from the design value, which increases the impact of the airflow on the impeller and affects the working efficiency of the impeller. At the same time, it has a strong pressure The airflow hits the impeller, and the vibration caused by the impact will also be abnormal, and the impeller is a high-speed rotating part, and long-term accumulation will have a bad effect on the supercharger

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