DEVICE FOR SAMPLING AIR FROM UNDERHOOD SPACE OF AIRCRAFT GAS TURBINE ENGINES Russian patent published in 2025 - IPC G01N1/22 

FIELD: sampling.

SUBSTANCE: invention relates to a device for sampling air from underhood space of aircraft gas turbine engines, comprising cylindrical housings, each with an inlet union closed from the inside by a check valve, and a piston with a rod and a handle. Device is characterized by the fact that the cylindrical housings are fixed on the parallel to the axes of these housings a bed arranged in the form of a rod, and the handles with pistons are fixed on the drive, also made in the form of a rod with a handle parallel to the bed, moving coaxially to the bed without the possibility of rotation in the bushings fixed on the bed, due to the release and expansion of the drive spring located in the spring housing fixed on the bed, the right end of the drive spring is fixed on the drive, and the left end rests against the spring-loaded cover of the drive spring body; state of the charged spring of the drive is fixed by the axis of the stopper falling into the annular groove on the drive, stopper axis is rigidly connected to a spring-loaded electromagnet, fixed on the bed, perpendicular to the stopper axis by a magnetic material disc, which is retracted when the electromagnet is connected into it from the control panel together with the stopper axis, releasing the drive movement pulling the pistons by the handles to the return springs located in the above-piston space of the cylindrical housings, at that, the oblique stop installed on the drive provides the opening of the spring-loaded cover of the drive spring, releasing this spring, and the bed and the drive are made in the form of screwed axes with the possibility of simultaneous attachment of several cylindrical housings coaxially with the common drive.

EFFECT: achievement of which is directed by the claimed device consists in increasing the accuracy of determining the concentrations of fire-extinguishing substances in the air of the engine nacelles of the aircraft by reducing the dimensions of the samplers assembled into probes with a common drive, and, consequently, increase of control points and reduction of time of ground and flight experiments for evaluation of efficiency of GTE fire extinguishing systems.

1 cl, 1 dwg