TURBO-EXPANDER POWER PLANT OPERATION METHOD Russian patent published in 2022 - IPC F01D1/02 F01D1/10 F01D25/18 

FIELD: power engineering.

SUBSTANCE: invention relates to the field of power engineering and can be used in the field of gas supply. A method is proposed for operating a turbo-expander power plant containing a three-stage axial blade machine equipped with an adjustable nozzle apparatus, the rotor of which is mounted in rolling bearings. The power take-off from the rotor of the axial blade machine is carried out at a constant speed, maintaining the specified gas pressure at the inlet and outlet of the axial blade machine, controlling the axial load on the rotor support bearing and providing a change in gas flow through the installation in the range from 0.7 to 1, 3 of its nominal value. The degree of reactivity of at least the first stage of the axial blade machine is changed up to negative values ​​and the value of the axial load on the thrust bearing of the rotor is reduced to a predetermined value, into the cavity of which grease is supplied under pressure, a gas leak is formed to remove the lubricant from the cavity of the thrust bearing with venting specified cavity.

EFFECT: invention makes it possible to reduce the amount of axial force transmitted to the support bearing of the rotor of a turbo-expander unit while improving the lubrication conditions of the support bearing.

1 cl, 4 dwg