NORMALLY OPEN FUEL PRODUCTION VALVE Russian patent published in 2024 - IPC F16K3/24 F16K31/122 F02C7/232 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to fuel production valves that regulate fuel production from aircraft tanks. The normally open fuel supply valve comprises a body, a cone-shaped flow divider, an inlet command pressure fitting, an outlet drain fitting, a spring-loaded hollow cylindrical piston, a hollow cylindrical cover, a hollow stem coaxially installed inside the body. The flow divider is located with the top of the cone towards the main flow and is connected to the body by at least three jumpers, forming a single whole with the body, the spring-loaded hollow cylindrical piston is mounted on the outer part of the base of the flow divider and configured for longitudinal movement, the hollow cylindrical cover is installed on the outer part of the hollow cylindrical piston, a spring is installed between the hollow cylindrical piston and the base of the flow divider. An annular cylindrical bore is made on the lower end of the hollow cylindrical piston, in which a sealing element is installed, a sharp edge is made on the outer part of the body at the point where the lower end of the hollow cylindrical piston adjoins it, a sealing element with a cuff is installed between the hollow cylindrical piston and the rod passing through it, an annular sealing element with a cuff is installed in the upper part of the hollow cylindrical piston. On the outer part of the flow divider, from the side of its base, an annular cylindrical bore is made, in which a sealing element with a cuff is installed.

EFFECT: invention makes it possible to ensure the use of fuel from aircraft tanks in the absence of command pressure from the jet sensor, to minimize the risk of jamming of the fuel use valve and to increase the reliability of the fuel system as a whole.

2 cl, 1 dwg