| 摘要 |
FIELD: physics. ^ SUBSTANCE: inner cavity of an article is evacuated until achieving steady-state equilibrium pressure in the article and testing system; the article is disconnected from the testing system, while continuing to evacuate the testing system, a gas stream Qk.t. from a reference leak is fed into the testing system. According to the invention, after disconnecting the evacuated article from the testing system, the steady-state equilibrium pressure Psyst.1 in the testing system, which corresponds to the influx of a natural gas separation stream into the testing system and leakage of the testing system is measured, and after feeding the gas stream from the reference leak Qk.t. into the testing system with the article disconnected from the testing system, the steady-state equilibrium pressure Psyst+k.t. in the testing system is measured, said steady-state equilibrium pressure corresponding to influx of a natural gas separation stream into the testing system and leakage of the testing system and the gas stream from the reference leak Qk.t., after which the feeding of the gas stream Qk.t. from the reference leak is stopped; the article is connected with the testing system and the steady-state equilibrium pressure Part.+syst., which corresponds to the influx into the testing system of a stream from leakage of the article and natural gas separation stream and leakage of the testing system, is measured; the article is disconnected from the testing system and the steady-state equilibrium pressure Psyst.2, which corresponds to influx of natural gas separation stream into the testing system and leakage of the testing system is measured, and the leakage value of the article Qart. is determined using a mathematical relationship given in the claim. ^ EFFECT: high accuracy of determining air-tightness of articles, reliability and longevity of articles during use. |
