BYPASS VALVE Russian patent published in 2021 - IPC F16K17/04 F16K17/40 

FIELD: valves.

SUBSTANCE: invention relates to the field of aircraft engine building and relates to a bypass valve used in the oil systems of aircraft gas turbine engines for maintaining a predetermined value of the oil supply pressure. The bypass valve comprises a body with a seat in contact with the end of a spring-loaded plate. A sleeve with two rows of sequentially located windows and a bushing installed outside the sleeve, overlapping the row of windows closest to the seat, is installed in the body above the seat. The inner cavity in the sleeve communicates with the outlet cavity in the body through the row of windows farthest from the seat, and a movable support is installed above the plate, located, in the closed position of the valve, at a distance from the stop end of the plate facing said support equal to half the difference between the longitudinal length of the row of windows closest to the seat and the thickness of the plate.

EFFECT: increased reliability of the engine due to optimisation of adjustment of the oil supply pressure in different operating modes, reduced required productivity of the oil supply system and the bulk of the injection pumps, as well as the reduced power consumption of the injection pumps.

3 cl, 3 dwg