Supercharger with combined sealing structure of double-sided turbine

Abstract

The invention discloses a pressurizer with double turbines and of a combined sealing structure. The pressurizer with double turbines and of the combined sealing structure comprises a turbine tank and the double turbines installed in the turbine tank; the double turbines are composed of two turbines back to back, namely the first turbine and the second turbine ; the turbine tank is provided with an airflow inlet channel and an airflow outlet channel; the output ends of the first turbine and the second turbine are provided with a first turbine air exhaust channel and a second turbine air exhaust channel correspondingly; the first turbine air exhaust channel and the second turbine air exhaust channel are used for exhaust; the first turbine air exhaust channel and the second turbine air exhaust channel communicate with each other at the tail end; the first turbine body and the second turbine body of the double-turbine are coaxially connected with a rotation shaft back to back; and a thermally-insulated cover is arranged between a bearing body and the double-turbine. The pressurizer with double turbines of the combined sealing structure has high efficiency and a broad matching range under different working conditions; the purpose of effective seal on gas is achieved; the amount of gas leakage is reduced; working ability of the gas is improved; the entirety performance of the pressurizer is improved; the gas is effectively prevented from entering into a cavity of a bearing body; and the reliability of the pressurizer is improved.

Description

technical field [0001] The invention belongs to the technical field of superchargers, in particular to a supercharger with a double-sided turbine and a combined sealing structure. Background technique [0002] With the use of the engine for multiple working conditions and variable altitude adaptation, the supercharger is required to have higher efficiency and pressure ratio under different working conditions. In the prior art, on the basis that the turbine impeller remains unchanged, the flow adjustment is realized through the outlet throat area of ​​the nozzle, but the design of the turbine is based on the design of the point working condition. After the deviation from the design working condition point, the efficiency of the turbine It will be reduced, and the matching characteristics with the compressor will be deteriorated. Therefore, a supercharger with high efficiency and wide matching range under different working conditions is required. [0003] Also, with the incr...

AI Technical Summary

Problems solved by technology

In the prior art, on the basis that the turbine impeller remains unchanged, the flow adjustment is realized through the outlet throat area of ​​the nozzle, but the design of the turbine is based on the design of the point working condition. After the deviation from the design working condition point, the efficiency of the turbine will be reduced, and the matching characteristics with the compressor will be deteriorated

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