CENTRIFUGAL-GEAR-CASING PUMP Russian patent published in 2019 - IPC F04C2/08 F04C11/00 F04D13/12 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pumps used in oil systems of aircraft gas turbine engines for oil supply and discharge. Centrifugal-gear-type pump comprises gears 2 arranged in bores of housing 1 and installed on shafts 3 located in support bearings 4, channels 9 made in hubs of gears 2 with intake holes 16 for supply of liquid into inter-teeth cavities 10, throttling needles 13, installed before holes 16 with possibility of axial movement and equipped with device for limiting movement of needle 13. Pump is equipped with rod 12 installed coaxially to central bore 11 made inside each of gears 2. Needle 13 is installed on rod 12, is spring loaded on the side of pinion 2 and is connected to rod 12 with possibility of free axial travel. End of rod 12 passes through gear 2 inside shaft 3 and is fixed in it by pin 18 pressed into jointly processed radial holes in rod 12 and shaft 3 located under bearing 4 nearest to gear 3. On the opposite end of rod 12 there is a device for limiting the movement of needle 13.

EFFECT: invention is aimed at simplifying the design of the discharge centrifugal-gear pump and improving accuracy of adjustment of its efficiency.

1 cl, 1 dwg