DEVICE FOR COOLING CASE OF TURBINE IN TURBO-MACHINE Russian patent published in 2011 - IPC F01D5/08 

FIELD: machine building.

SUBSTANCE: here is disclosed device for cooling case of turbine in turbo-machine, particularly, in turbo-jet motor or in turbo-jet engine of aircraft. The turbine consists of several steps and a wheel rotating in the case inside a cylinder shell. The shell is composed of sectors of a ring secured on the case along circumference. Each step of the turbine contains a distributing mechanism formed with a row of fixed blades; the row is arranged along the ring and the blades are attached to the case of the turbine. A blade-cooling circuit of the distributing mechanism of an inlet step consists of circuits of cooling air supply into internal cavities in the blades of the distributing mechanism and of a device for supply of air to inlet brackets of the case functioning as suspension of the ring sectors enveloping the wheel of the inlet step. The devices of air supply connect internal cavities of the blades of the distributing mechanism of the inlet step with space around the ring wherein there are positioned the inlet brackets. The internal cavities of the blades are covered with plates mounted on a wall and attached to it. Orifices made in the plates function as outlets from the cavities of the blades and they are open into a circular passage connected to circular space; this connection is implemented through orifices made in a circular external rim of the distributing mechanism. The orifices of the devices for air supply are made in the circular external rim of the distributing mechanism positioned in radial direction between the radial external walls of the blades cavities and the inlet brackets for suspension of the ring sectors.

EFFECT: increased efficiency of cooling.

14 cl, 9 dwg