DEVICE FOR STARTING GAS TURBINE ENGINE Russian patent published in 2017 - IPC F02C7/26 

FIELD: engine devices and pumps.

SUBSTANCE: device for starting the gas turbine engine comprises a rotor formed by a compressor, a turbine and a shaft connecting thereof, a combustion chamber, an auxiliary power plant, a pipeline connecting the auxiliary power plant with a turbine cooling system incorporating nozzle vanes with inner duct connected with turbine flow passage portion through slots in outlet edges of the nozzle vanes, and a working wheel with a disc and working blades. The device is equipped with a high pressure air supply system, a low pressure air supply system, a valve located in the high-pressure air supply system, an additional valve located in the low-pressure air supply system, an air duct formed in the inner path of the turbine nozzle blades, a stator twist device, a blade-free diffuser, high-pressure air supply channels, low-pressure air supply channels, and working blades having an internal cavity divided along the mean line of the profile by a partition forming a channel adjacent to a profile trough, and a channel adjacent to the back of the profile. The channel adjoining the profile trough is successively communicated through the high pressure air supply channels, the blade-free diffuser, the stator twist device, the air duct, and with the high pressure air supply system and with the auxiliary power unit. The channel adjoining the profile back is communicated through the low pressure air supply channels with the low pressure air supply system. The channels adjacent to the trough and back of the profile, through the perforations on the trough and back, are respectively connected to the turbine flow part. The channels of the stator twisting device are directed towards rotation direction of the working wheel.

EFFECT: simplify and increase the reliability of the launch, expand the launch range, reduce the weight of the system.

5 dwg