Dual-chamber measuring device for measuring the leakage rate of seals

Abstract

The invention relates to a dual-chamber measuring device for measuring the leakage rate of seals. The dual-chamber measurement device includes a base, a loading plate, a sealing cover, a sealing ring and a fixture, wherein the loading plate has a T-shaped cross section, and the loading plate is arranged on the base by means of the sealing ring , the base and the loading plate are sealed by the sealing cover plates at the front and rear sides, thereby forming a sealed box, the seal to be measured is installed on the bottom surface of the base by means of the clamp, The lower end of the loading plate loads the seal and, together with the seal, divides the dual chamber measurement device into a first chamber and a second chamber. The invention can achieve the following beneficial technical effects: the leakage rate of the sealing member can be measured with high precision.

Description

technical field [0001] The invention relates to the technical field of functional testing, in particular to a double-chamber measuring device for measuring the leakage rate of a seal. Background technique [0002] Modern aircraft cabins are usually pressurized, and the airtight performance of the cabin door in the pressurized area directly affects the safety of passengers and crew members. Especially in the field of aerospace, the working environment of the seals is harsh, so it poses a challenge to the leakage performance of the seals. Therefore, it is necessary to study its airtight performance at different compression ratios (working conditions). [0003] The traditional measurement method is to simulate a closed cavity and test the leakage of the actual seal by introducing a flowmeter. However, because the flow rate is small, it is difficult to obtain accurate data simply by measuring with a meter, and it can only be averaged over a long period of time. The approximate ...

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Problems solved by technology

[0003] The traditional measurement method is to simulate a closed cavity and test the leakage of the actual seal by introducing a flowmeter. However, because the flow rate is small, it is difficult to obtain accurate data simply by measuring with a meter, and it can only be averaged over a long period of time. It is difficult to meet the high-precision test requirements

[0004] In addition, the pressure outside the cabin at high altitude is less than one standard atmospheric pressure, and the single-chamber measurement of the leakage rate itself cannot accurately simulate the working conditions of the aircraft seals in real conditions

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