THRUST CONTROLLER FOR EXHAUST TURBINE SUPERCHARGER

PURPOSE:To minimize the pressure-receiving area of each thrust bearing despite the reactionary force of a turbine, by controlling the thrust acting on the back of the impeller of a compressor, and those acting on both the sides of a turbine disk, to eliminate or minimize the thrust of a rotor shaft. CONSTITUTION:An enclosed chamber A on the compressor side of a turbine disk 12 and an air discharge port 37 are connected to each other through a high- pressure air introducing pipe 46 furnished with a control valve 45. An enclosed chamber B and an exhaust gas outlet port 40 are connected to each other through an exhaust gas communication pipe 48 furnished with a control valve 47. An enclosed chamber C is connected to an atmosphere release pipe 44 furnished with a control valve 43. The output signals of the temperature transmitter 49, which transmits the temperatures of a thrust bearing 23 near a compressor and a thrust bearing 24 near a turbine, and those of a valve opening degree transmitter 50, which transmits the degree of opening of the control valves 43, 45, 47, are entered into an opening degree discriminator 51 connected to an actuator 54 through a deviation corrector 52 and a control unit 53.