Composite power axial and radial flow gas compressor

Abstract

The invention discloses a composite power axial and radial flow gas compressor. The composite power axial and radial flow gas compressor comprises a first-stage axial flow gas compressor driven by an electric motor and a first-stage radial flow gas compressor driven by a turbosupercharger. The axial flow gas compressor and the radial flow gas compressor are sequentially arranged in the axial direction, the axial flow gas compressor is connected to the electric motor, and the radial flow gas compressor is connected to a supercharger spindle of the turbosupercharger. According to the axial and radial flow gas compressor, the axial flow gas compressor and the radial flow gas compressor are sequentially driven by the electric motor and the supercharger spindle correspondingly, the requirements of the turbosupercharger for large torque under the low-rotating-speed working condition, high supercharge pressure under the high-speed or high-load working condition and the rapid response can be met, the axial flow gas compressor driven by the electric motor is more flexibly controlled, the rotating speed is improved, the airflow entering the radial flow gas compressor is increased, two-stage pressurizing can be achieved under the high working condition, the power density of an engine is improved, the pressure ratio of the supercharger is further improved, the compactness advantage is achieved, and the matching requirement of the supercharger with the axial and radial flow gas compressor for the full-running working condition of a diesel engine can be ensured.

Description

technical field [0001] The invention relates to the technical field of impellers and internal combustion engines, in particular to a composite power axial radial compressor. Background technique [0002] The internal combustion engine is a reciprocating power machine with a relatively wide operating range, while the turbocharger centrifugal compressor matched with the internal combustion engine is a rotating machine with a narrow efficient operating range. When the turbocharger is matched with the engine at low operating conditions, and the engine is at high operating conditions, the supercharger centrifugal compressor impeller overspeeds. When the turbocharger is matched with the engine in the medium-to-high working condition, the low working condition of the engine will result in insufficient boosting capacity, poor engine operation economy, insufficient torque, and poor transient response, which have always been the disadvantages of turbocharged engines. [0003] Therefo...

AI Technical Summary

Problems solved by technology

However, since the turbine characteristics of the supercharger have not changed, the compressor end drives the axial flow compressor and the radial flow compressor through a turbine shaft, and the transient response in low working conditions is poor

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