METHOD OF REDUCING TURBINE OIL CONSUMPTION DURING OPERATION OF CENTRIFUGAL SUPERCHARGER Russian patent published in 2021 - IPC F04D29/04 F04D29/08 

FIELD: machine building.

SUBSTANCE: invention relates to methods of reducing consumption of turbine oil in a system for sealing centrifugal injectors with floating "oil-gas" O-rings during operation of gas transfer units at low compression ratio (less than 1.19). Method for reducing turbine oil consumption during centrifugal blower operation, including two pressure reducing structures, each of which is made in the form of three body parts, which are a high-pressure housing, a low-pressure housing and an outlet pressure housing, to the high-pressure housing on the inner side of the nozzle is connected through the heat-insulating bushing, on the other side there is a nozzle for connection of the outlet header of the pump, to the outlet pressure housing on the inner side the chamber is connected, also through the thermally insulating sleeve, on the other side of the outlet pressure housing there is a nozzle for connecting the inlet manifold of the air pump, both parts are bolted to the low pressure housing, which is a hollow cylinder with a nozzle, so that during operation of gas transfer unit (GPU) in hollow cylinder there is formed a low pressure area, wherein pressure at the outlet of the supercharger is always higher than the inlet pressure, gas, passing through the nozzle, increasing speed, falls into the chamber, having at the beginning narrowing, and at the outlet expansion, then falls to the inlet of the charger, thereby during movement of gas in the cavity of the low pressure housing creates an ejection, due to which pressure in it is always lower than pressure at inlet and in any of internal chambers of supercharger, thus, by connecting equalizing line from float chamber to this cavity of device, in any operating conditions of the supercharger always ensures the required direction of the gas flow coinciding in direction with oil flows merging with the supercharger cavities, providing efficient drain of turbine oil, at that, connection of equalizing lines to the low pressure housing is provided both on the side of the injector drive end, and on the rear end of the supercharger, wherein flow rate and gas flow rate can be controlled by selection of nozzle opening diameter and needle valves installed in balancing lines of float chambers and at the device inlet.

EFFECT: technical result achieved when implementing said method is to provide a continuous gas flow, the direction of which coincides in direction with the oil flow merging with the supercharger cavities, both rear end of injector, and drive end of injector, improved quality of transported natural gas and, as a result, increased overhaul period of main units of centrifugal blower.

4 cl, 3 dwg