POWER UNIT WITH MACHINE POWER CONVERSION Russian patent published in 2021 - IPC F02C6/02 

FIELD: power engineering.

SUBSTANCE: power unit is comprised of an electric generator (EG) (1) kinematically coupled with a turbine compressor (TC) (2) on the side of the compressor entrance, a heat source (4), a heat regenerator (5), a refrigerator heat exchanger (6) of the system for removal of low-potential heat from the working circuit with a liquid heat carrier, a main line (16) including a heat exchanger (18), removing the gaseous rotor cooling working fluid from the cavity of the EG (1) on the side opposite to the location of the TC (2). The main line (16) communicates with the cavity of the EG (1) on the side of the TC (2), forming a closed autonomous cooling circuit for the rotor of the EG (1). The circuit includes an electrically driven fan (17), a normally closed drainage electric valve (19), a sensor (20) of the pressure in the cavity of the EG (1). A hydraulic gate is made between the compressor and the EG (1), in the form of a two-sided impeller with two impeller wheels (10, 11) separated by a disk (12). The shared channel (A) of the impeller wheels (10, 11) communicates with the outlet of the electric pump (7), the entrance whereof communicates with the main line for supplying the liquid heat carrier to the refrigerator heat exchanger (6), via a pipeline (8) including a shut-off valve (9). The channel (A) communicates with the main line for removing the liquid heat carrier from the refrigerator heat exchanger (6) via a pipeline (13) including a throttle plate (14) and a check valve (15).

EFFECT: invention is aimed at increasing the efficiency of the power unit, the performance coefficient thereof, by reducing the power losses caused by friction of the rotor of the electric generator with the gas cooling the rotor by reducing the pressure of the gaseous working fluid of the power unit used for cooling the rotor of the electric generator at the established operation mode with sufficient cooling of the rotor.

1 cl, 2 dwg