DEVICE FOR 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 devices for reducing turbine oil consumption in a system for sealing centrifugal injectors with floating "oil-gas" O-rings during operation of gas-pumping units at low compression ratio (less than 1.19). Device for reducing turbine oil flow during operation of centrifugal air pump, including two structures, which reduce pressure, 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, nozzle is connected to the high-pressure housing on the inner side through a thermally insulating sleeve, on the other side there is a nozzle for connection of the outlet header of the air pump, a chamber is connected to the outlet pressure housing on the inner side, also through the heat-insulating bushing, on the other side of the outlet pressure housing there is a nozzle for connection of 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 formed is low pressure area, wherein the pressure at the outlet of the injector is always higher than the pressure at the inlet, the gas passing through the nozzle, while increasing the velocity, falls into the chamber having a narrowing at the beginning, and at the outlet expansion, then falls to the inlet of the supercharger, thereby during movement of gas in the cavity of the low pressure housing creates ejection, which is why the pressure in it is always lower than the pressure at the inlet and any of the internal chambers of the supercharger, thereby, by connecting the equalizing line from the float chamber to this cavity of the device, in whatever operating conditions of the air pump there is always the required direction of the gas flow coinciding in direction with oil flows, merging with injector cavities, providing efficient drain of turbine oil, at that connection of equalizing lines to low pressure housing is provided both on the side of actuating end of supercharger, and on the side of the rear end of the charger, wherein the flow rate and the gas flow rate can be controlled by selecting diameter of the nozzle hole and needle valves installed in the equalizing lines of the float chambers and at the inlet of the device.

EFFECT: technical result achieved when using the device for reducing the flow of turbine oil during operation of the centrifugal air pump is to provide a continuous gas flow, direction of which coincides in direction with oil flow, merging with supercharger cavities both rear end of injector, and actuating end of supercharger, improving quality of transported natural gas and, as a result, increasing overhaul period of main units of centrifugal blower.

4 cl, 3 dwg