Piston air leakage amount measurement system based on balanced flow meter

Abstract

The invention relates to a piston air leakage amount measurement system based on a balanced flow meter. The piston air leakage amount measurement system comprises the components of an air flow pipe (1), the balanced flow meter (2), a first pressure acquiring unit, a second pressure acquiring unit and a processor unit. The air flow pipe (1) is connected with a piston air leakage port. The balanced flow meter (2) is arranged in the air flow pipe (1). The first pressure acquiring unit and the second pressure acquiring unit are arranged at two sides of the balanced flow meter (2) and are communicated with the air flow pipe (1). The first pressure acquiring unit and the second pressure acquiring unit are connected with a processor unit. The first pressure acquiring unit and the second pressure acquiring unit acquire pressures in the air flow pipe (1) at two sides of the balanced flow meter (2) and transmits the pressure to a processor unit. The processor unit performs processing for acquiring volume flow and mass flow of the fluid. Compared with the prior art, the piston air leakage amount measurement system has advantages of simple structure, accurate measurement structure, etc.

Description

technical field [0001] The invention relates to a piston air leakage measurement system, in particular to a piston air leakage measurement system based on a balance flow meter. Background technique [0002] The flow meter is one of the essential devices for the engine bench test, and is used to measure the flow rate of the engine piston leakage. At present, most of the engine piston air leakage measurement systems are composed of single-orifice plate flowmeters. By installing a single-orifice plate throttling piece inside the airflow pipe, since the pore diameter of the throttling piece is smaller than the inner diameter of the pipe, when the fluid flows through the throttling piece, The cross-section of the stream suddenly shrinks, and the flow speed increases, which reduces the static pressure of the fluid at the rear end of the throttling piece, so a static pressure difference is generated before and after the throttling piece, and then the differential pressure gauge is ...

AI Technical Summary

Problems solved by technology

However, this kind of flowmeter measurement system is greatly restricted by the requirements of the airflow pipeline, which may easily cause the imbalance of the flow field and reduce the measurement accuracy.

In the existing technology, the patent number is CN203534679U, and the patent of the correction system of the orifice flowmeter is named. In actual use, due to the complicated structure and inconvenient installation, the measurement efficiency of the piston leakage is low; and when the measurement is relatively When the flow rate is large, it is easy to produce errors in the measurement of piston leakage

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