VGV VANE POSITION CONTROL DEVICE Russian patent published in 2018 - IPC F04D27/00 

FIELD: motors and pumps.

SUBSTANCE: invention relates to the field of automatic regulation of gas turbine engines (GTE). Device for controlling the position of the blades of the variable guide vane (VGV) of the gas turbine engine compressor comprises an adjustable output throttle connected through a power member with VGV vanes, an absolute pressure ratio sensor (APRS) with a high-pressure input nozzle and a low-pressure supply channel, a jet amplifier whose output channels are connected to the control cavities of the power member. Device comprises a comparison element (CE) comprising a first and a second control channels, and an input throttle connected through a channel to a gas turbine compressor and forming, together with an adjustable output throttle, an inter-throttle chamber the output of which is connected to the CE supply nozzle and to the APRS high-pressure input nozzle connected through the output channel to the CE first control channel, and the CE second control channel and the APRS low pressure supply channel are connected to the cavity at the entrance to the engine. Device comprises a pneumatic fixing device comprising a piston-driven spring-loaded valve having a first and a second control cavity, the first control cavity being connected to a low-pressure cavity, and the second control cavity – to the output channel of the jet amplifier, controlling the cavity of the power member, and through the valve – to the high-pressure cavity.

EFFECT: this device makes it possible to increase the accuracy of the operation of the VGV vane position control device at low GTE operation modes.

1 cl, 2 dwg