GAS-TURBINE INSTALLATION Russian patent published in 2010 - IPC F02K3/02 

FIELD: machine building.

SUBSTANCE: gas-turbine installation consists of low pressure compressor at input, of power gas turbine for driving useful load at output, and of channels of external and internal circuits. Additionally a shaft of the gas turbine is connected to the low pressure compressor. A running part of the first stages of the power turbine at the input is connected with the channel of the internal circuit, while the running part of the following stages is connected with channels of external and internal circuits. The running part of the following stages is coupled with the channel of the external circuit along periphery at input into a nozzle blade by means of a circular channel, which is restricted at the output. The external case of the first stages of the power turbine is coupled with the external case of the internal circuit. The external case of the following stages is coupled with the external case of the external circuit channel. The external cases of the first and following stages are fixed between them in a radial direction and can perform radial travels. Number of the first stages of the power turbine equals to 1-2, while number of the following stages of the power turbine equals to 2-4.

EFFECT: raised reliability and efficiency of installation due to elimination of thermal deformations of nozzle and working blades, deformation of external cases of channels of external and internal circuits, also reduced cost due to reduced number of stages of power turbine.

2 dwg