METHOD OF DETERMINING LEAKAGE OF ARTICLES OPERATING UNDER EXTERNAL PRESSURE AND INTERNAL EXCESS PRESSURE Russian patent published in 2020 - IPC G01M3/02 G01M3/26 

FIELD: test equipment.

SUBSTANCE: invention relates to the field of analyzing devices for tightness and can be used to determine leakage of articles operating under external pressure and internal excess pressure, for example, space equipment. Substance: evacuated by means (1) of evacuation inner cavity of article (4) through test system (5) to steady-state equilibrium pressure in article (4) and test system (5). Disconnecting article (4) from test system (5), while continuing evacuation of test system (5) by means of vacuumizing means (1). First steady-state equilibrium partial pressure of the air component in test system (5) is measured, which corresponds to the intrinsic flow of gas release and leakage into test system (5). Air component used is gas contained in the air and different from gases used to fill the inner cavity of article (4) to excess test pressure during previous tests of this article (4) for air-tightness. Calibrated leak (7) is connected to test system (5). Testing system (5) with calibrated leak (7) is evacuated. Flow of gas used as air flow is supplied through calibrated leak (7). Steady-state equilibrium partial pressure of the air component in test system (5) is measured, which corresponds to the flow into test system (5) of the proper flow of gas release and leakage and air flow from calibrated leak (7). Calibrated leak (7) is disconnected from test system (5). Article (4) is connected to test system (5). Steady-state equilibrium partial pressure of the air component is measured, which corresponds to the flow into test system (5) from the leakage of article (4) and the intrinsic gas release and leakage flow. Disconnecting article (4) from test system (5). Second steady-state equilibrium partial pressure of the air component is measured, which corresponds to the flow of intrinsic gas release and leakage into test system (5). Product leakage value (4) is calculated from the measurement results.

EFFECT: improved accuracy of determining leakage of articles.

1 cl, 2 dwg