Turbocharger pressure shell assembly and gas compressor

Abstract

The invention relates to a turbocharger pressure shell assembly and a gas compressor. The device comprises a pressing shell, the pressing shell comprises an air inlet channel, and the air inlet channel comprises an air inlet; the silencing cover is mounted at the air inlet of the pressing shell; the connecting part is arranged in the air inlet channel; the casing groove flow channel is formed between the connecting part and the inner wall of the pressing shell and between the connecting part and the silencing cover, the casing groove flow channel comprises a casing groove inlet and a casing groove outlet, the casing groove inlet is located between one end of the connecting part and the inner wall of the pressing shell, and the casing groove outlet is located between the other end of the connecting part and the inner wall of the pressing shell. And the outlet of the casing groove is positioned between the other end of the connecting part and the silencing cover. The noise reduction cover is arranged in the pressure shell, the noise reduction cover is matched with the casing groove flow channel to play a flow guide role, the velocity component of backflow gas in the circumferential direction when the backflow gas is converged into main gas flow is reduced, the velocity component in the axial direction is increased, and the efficiency of a supercharger compressor close to a surge area can be improved.

Description

technical field [0001] The invention relates to the technical field of turbochargers, in particular to a turbocharger pressure shell assembly and a compressor. Background technique [0002] Surge fault is an unstable working condition that often occurs during the operation of the engine. In essence, the airflow at the inlet of the compressor drops suddenly, causing low-frequency and high-amplitude vibration of the airflow along the axial direction of the compressor. And produce LCF (low cycle fatigue) failure. [0003] At present, the application scope of superchargers pays more attention to the performance of the low-speed and low-pressure ratio operating conditions. The turbocharger compressor is more prone to surge in the low-pressure ratio and small flow range, so it pays more attention to the surge conditions and surges in the low-pressure area. margin. [0004] In the current pressure shell assembly design technology in the industry, the use of casing grooves (ie ret...

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Problems solved by technology

[0005] Aiming at the problems of widening the surge margin and improving the performance close to the surge area, the present invention provides a turbocharger pressure casing assembly and a compressor, the pressure casing assembly can expand the pressure end flow rate compared with the traditional casing groove range and optimizes performance in the compressor surge range

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