Solar-energy heat power-generating system and thermoelectric conversion device thereof

A thermoelectric conversion device for a solar thermal power generation system, comprising:

• a generator;
• a compressor;
• a turbine;
• and
• an intermediate body fixedly connected between the compressor and the turbine,
• wherein a transmission shaft is rotatably connected inside the intermediate body, the transmission shaft is fixedly connected to a rotating shaft of the generator, and a compressor impeller of the compressor and a turbine impeller of the turbine both are mounted on the transmission shaft;
• the generator is further connected to a lead for inputting current;
• wherein when the system is started, the generator functions as an electric motor;
• and when the system is in normal operation, the generator functions to produce electricity;
• and
• wherein the intermediate body is rotatably connected to the transmission shaft through a floating bearing, a thrust bearing is provided in front of the floating bearing;
• an oil inlet hole is provided at a top end of the intermediate body, lubrication passages leading to two of the floating bearing and the thrust bearing are provided at a bottom end of the oil inlet hole, an oil outlet hole is further provided at a bottom end of the intermediate body;
• an oil baffle plate is further provided at a lower end of a transition ring, the oil baffle plate is located in front of the thrust bearing and is arranged to be inclined towards the oil outlet hole.