Volume substitution method vacuum cavity volume test system and test method thereof

Abstract

The invention discloses a volume substitution method vacuum cavity volume test system and a test method thereof, which belong to the field of vacuum cavity volume test. The invention discloses a method for accurately measuring the volume of a non-standard vacuum cavity by utilizing a built-in standard volume and two times of gas static expansion. The gas in the gas expansion chamber expands to themeasured vacuum chamber to measure the volume ratio of the two vacuum chambers, and the gas in the gas expansion chamber expands to the measured vacuum chamber to measure the accurate volume of the measured vacuum chamber under the condition that the gas expansion chamber is placed into the standard volume. A vacuum measurement system convenient to operate is provided, a gas expansion chamber, avalve and a standard volume are subjected to special high-vacuum treatment, the material deflation rate is low, background deflation of the device in the gas static expansion process is extremely small, and the measurement accuracy is guaranteed. According to the system and the method, the volumes of various types of vacuum cavities can be rapidly, conveniently and accurately measured.

Description

technical field [0001] The invention belongs to the field of vacuum chamber volume testing, and in particular relates to a volume substitution method vacuum chamber volume testing system and a testing method thereof. Background technique [0002] The gas flow control of spraying equipment for aero-engine turbine production is a key process to improve the quality of engine blades, which directly affects the reliability of engine performance. The flow calibration of spraying equipment is the premise to ensure the spraying effect. The gas flow standard device based on the constant volume method has simple structure and low cost, is suitable for traceability of small flow gas verification devices, and can meet the on-site calibration requirements of existing aero-engine turbine blade spraying equipment. However, the constant volume method flow calibration is easily affected by factors such as ambient temperature, constant volume vacuum chamber volume, reference standards, etc., ...

AI Technical Summary

Problems solved by technology

However, the constant volume method flow calibration is easily affected by factors such as ambient temperature, constant volume vacuum chamber volume, reference standards, etc., and since constant volume vacuum chambers and joints are generally non-standard custom-made, with different shapes and sizes, the volume of It is very difficult to measure accurately

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