Comprehensive test bed system of exhaust gas turbocharger

Abstract

The invention aims to provide a comprehensive test bed system for an exhaust gas turbocharger; a gas compressor is coaxial with a turbine, a high-temperature gas compressor is coaxial with a gas turbine, a static chamber is connected with the gas compressor, an outlet pipeline of the gas compressor is connected with a first gas inlet valve, and the first gas inlet valve is connected with an inlet pipeline of a combustion chamber; a first outlet of an air source is connected with the inlet pipeline of the combustion chamber through a second air inlet valve, an outlet pipeline of the combustion chamber is connected with the gas turbine, and the gas turbine is connected with an exhaust pipe; a second outlet of the air source is connected with an inlet pipeline of an electric heater through a third air inlet valve, an inlet and an outlet of the high-temperature gas compressor are connected with the electric heater and the turbine respectively, and an outlet pipeline of the turbine is connected with the inlet pipeline of the electric heater through a fourth air inlet valve. According to the closed turbine performance test loop, air serves as a working medium, the turbine is not polluted, a turbine gas compressor operates stably, and the accuracy of parameter measurement is high. The gas compressor performance test loop and the closed turbine performance test loop are relatively independent and do not interfere with each other.

Description

technical field [0001] The invention relates to a test bench, in particular to an exhaust gas turbocharger test bench. Background technique [0002] Turbine performance is mainly composed of parameters such as turbine expansion ratio, turbine speed, turbine flow, turbine efficiency and turbine expansion work. Due to the wide variation range of turbine performance parameters, the range of compressor performance parameters can often be covered in boost matching, so turbine performance is often ignored, and only compressor performance is emphasized. In fact, this is a misunderstanding. In today's increasingly stringent emission regulations, the post-processing device occupies a section of the exhaust pressure difference, which affects the full expansion of the turbine, and has to be compensated by increasing the boost ratio and the total efficiency of the supercharger. Therefore, more and more attention has been paid to improving the performance of turbines. [0003] The key ...

AI Technical Summary

Problems solved by technology

[0008] 1. Turbine working condition is unstable, affecting test accuracy

[0009] 2. With gas as the working medium, the temperature of the turbine inlet interface is not uniform, and carbon black pollution and even local sintering are prone to occur

[0010] 3. The combustion chamber and its rear pipe dissipate heat to the environment, which may easily cause compressor performance drift

[0011] 4. It is an ideal solution to test the performance of the turbine by electric heating of the working medium. The working medium is clean, does not damage the workpiece, and it is easy to adjust the inlet temperature, but the economy is poor.

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