Pressure gas balance system structure of turbocharger

Abstract

The invention discloses a pressure gas balance system structure of a turbocharger. The structure comprises a pressure gas entering channel formed in a middle body, and a balance channel communicatingwith the pressure gas entering channel, one end of the balance channel is connected with an annular cavity of a gas compressor gas seal cavity on the gas compressor end, and the other end of the balance channel communicates with the a turbine end oil and gas seal structure. The system structure schemes of gas compressor impeller blade back cooling function and the turbine end oil and gas seal function can be simultaneously or independently achieved, and on the premise of not increasing other parts, not damaging the pressurizer whole structure, not affecting the whole property and reliability of a pressurizer, the problem that the gas compressor impeller blade back cooling function and the turbine end oil and gas seal function are not associated, and even conflict and intervene can be solved.

Description

technical field [0001] The invention relates to the technical field of turbochargers, in particular to a structure of a turbocharger pressure gas balance system. Background technique [0002] As the load of the internal combustion engine increases, the operating speed and pressure ratio of the turbocharger increase accordingly. Under the background of high-speed and large-diameter application of the traditional aluminum alloy compressor impeller of the turbocharger, its working time is different from that of the inhaled The temperature of the surface material of the impeller caused by the friction of compressed air also increases accordingly. The long-term use of the compressor impeller at this high temperature and high speed will obviously reduce the mechanical properties and fatigue life of its aluminum alloy material, and affect the performance of the supercharger and internal combustion engine. Use reliability. [0003] The turbocharger scroll end seal structure will re...

AI Technical Summary

Problems solved by technology

[0002] As the load of the internal combustion engine increases, the operating speed and pressure ratio of the turbocharger increase accordingly. Under the background of high-speed and large-diameter application of the traditional aluminum alloy compressor impeller of the turbocharger, its working time is different from that of the inhaled The temperature of the surface material of the impeller caused by the friction of compressed air also increases accordingly. The long-term use of the compressor impeller at this high temperature and high speed will obviously reduce the mechanical properties and fatigue life of its aluminum alloy material, and affect the performance of the supercharger and internal combustion engine. Use reliability

[0003] The turbocharger scroll end seal structure will reduce the oil sealing ability due to carbon deposits during long-term use. When the turbocharger is used at low speed, the sealing ability of the reverse thread labyrinth structure will also be weak due to the low speed, making the bearing The lubricating oil in the oil return chamber of the casing overflows through the gap of the sealing structure, causing serious oil leakage or carbon deposits in the supercharger

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