METHOD OF OPERATION OF DISCHARGE PUMP OF GAS TURBINE ENGINE (GTE) OIL PUMP UNIT AND DISCHARGE PUMP OF GTE OIL PUMP UNIT OPERATING THEREWITH, GEAR WHEEL OF DISCHARGE PUMP OF GTE OIL PUMP UNIT, BLOCK OF THRUST BEARINGS OF DISCHARGE PUMP OF GTE OIL PUMP UNIT Russian patent published in 2018 - IPC B01J3/00 F04D13/12 

FIELD: motors and pumps.

SUBSTANCE: group of inventions relates to the field of aircraft engine building. Discharge pump comprises a gear-type operating member that includes two wheels mounted on parallel shafts, endowing each end with thrust bearings. Drive shaft is communicated by torque through the drive gear reducer spring to the power source. Frontal bearings are installed in the middle casing, and the rear ones are installed in the upper casing of the oil pump unit. Thrust bearings emerge with each input and output channel, forming jointly the gear wheels the successive sections of the oil pump path. Distance between the shafts is necessary and sufficient to ensure maximum mutual engagement of the teeth of the gear wheels. In the method of operation of the discharge pump, the latter is connected to the oil tank by a supply line, through which, at minimum pressure, oil is fed through the coarse filter into the gear pump body of the pump. Oil, with increasing pressure to the required level, is passed through the pump body, from where, under working pressure, through the fine filter, the supply line is directed to the loaded engine components for lubrication and cooling. Thrust bearings are made constructively and hydrodynamically adapted to the working parameters of the teeth and interdental cavities of the gear wheels of the gear wheels. Displacement of the pumped medium from the interdental cavity of each of the interacting gear wheels is performed in the angular sector of rotation of the gear wheels of the wheels determined by the half of the central angle formed by the points of intersection of the conditional cylindrical surfaces, coaxial with the axes of the corresponding wheels, describing the vertexes of the teeth of the gear rims from the approach to the exit point of intersection of the said conventional cylindrical surfaces in the course of rotation of the gear wheels comprising α_v.o.n. Angular sector of the subsequent rarefaction α_r.o.n. In the area that is freed from the pumped medium, the depression is equal to the displacement angle α_r.o.n.=α_v.o.n.

EFFECT: technical result of the group of inventions consists in increasing the efficiency, resource and reliability of the discharge oil pump unit operating.

12 cl, 4 dwg