CERAMIC OPEN SHELLS TIGHTNESS MONITORING METHOD Russian patent published in 2025 - IPC G01M3/02 

FIELD: testing.

SUBSTANCE: invention relates to testing equipment and increases information value, reliability and accuracy of inspecting air-tightness of articles with stringent reliability requirements during operation thereof, in such engineering fields as aviation, space and machine building. Disclosed is a method for monitoring tightness of ceramic open shells. Proposed method comprises sealing shell face with the help of vacuum grease and plate. After achieving vacuum, background value of helium Q_bg is measured, then tightness of joint of shell and tooling is checked by blowing with helium and fixing flow Q_He. If Q_He < Q_bg, cover is installed, Q_bg is re-measured and helium is supplied into cover, fixing total flow Q_Σ. Then the jacket is dismantled, atmospheric pressure is supplied to the shell and repeated sealing is performed. A local helium chamber is installed to measure the helium flux Q_He in different sections of the shell, while recording the results with reference to coordinates of leaks.

EFFECT: high information value and reliability of inspecting air-tightness of ceramic open shells by determining total gas flow through the inspected ceramic shell, as well as localization of detected leaks on the surface thereof.

1 cl, 3 dwg