LUBRICATION SYSTEM AND METHOD OF LUBRICATING BEARINGS OF A PLANT FOR GENERATING HEAT AND MECHANICAL ENERGY Russian patent published in 2020 - IPC F02C7/06 

FIELD: heat power engineering.

SUBSTANCE: invention relates to heat engineering, in particular to systems for lubrication of rotating elements of power plants, for example, steam and gas unit for generation of heat and mechanical energy. System for lubrication of bearings of an installation for generating heat and mechanical energy comprises water accumulator (6), the output of which is connected to the input of circulating pump (9) of the water circuit, which is configured to supply water to first (10) and second (11) bearing assemblies of steam-gas turbine (2). Besides, the second bearing assembly (11) of steam-gas turbine (2) is connected to unit (4) of heat and water recycling, which is connected to the input of water accumulator (6). Besides, the lubrication system contains accumulator (8) of liquid carbon dioxide, the output of which is connected to circulating pump (12) of the carbon dioxide circuit, which is made with the possibility of supply of liquid carbon dioxide to first (13) and second (14) bearing assemblies of the carbon dioxide compressor (3). Second bearing assembly (14) of carbon dioxide compressor (3) is connected to tank-separator (7) so that carbon dioxide can be supplied into it, and separator tank (7) contains two outputs and is made so, to enable supply of liquid carbon dioxide through first outlet and pump (15) for discharging liquid carbon dioxide from separator tank (7) to unit (5) for recycling heat and carbon dioxide, and is also configured to feed gaseous carbon dioxide through a second outlet and a line for discharging gaseous carbon dioxide (16) into a gas outlet system of the plant for generating thermal and mechanical energy before carbon dioxide compressor (3). Each bearing assembly comprises at least one bearing. Also disclosed is a method of lubricating bearings of an apparatus for generating heat and mechanical energy.

EFFECT: technical result consists in reduction of heat stress of moving elements of power plant structure, increase in efficiency of using media circulating in plant, as well as increase in reliability of installation.

6 cl, 1 dwg