公开(公告)号：US10138816B2

公开(公告)日：2018-11-27

申请号：US14858614

申请日：2015-09-18

Applicant: ROLLS-ROYCE, PLC

Inventor： Martin Yates ,  Mihir Desai

IPC: F02C7/236 ,  F04B49/035 ,  F04B23/14 ,  F04B17/05 ,  F04D15/00 ,  F04D1/10 ,  F04B23/12 ,  F04B41/06 ,  F04D13/12 ,  F04D9/04 ,  F04C2/10 ,  F04C2/344 ,  F04C11/00

Abstract: A fuel pumping unit has a low pressure centrifugal pump and a high pressure centrifugal pump. In use, the low pressure pump supplies fuel at a boosted pressure to the high pressure pump for onward supply to a fuel metering unit. The pumping unit further has a drive input which drives the low and high pressure pumps. A gear arrangement is operatively located between the drive input and the low and high pressure pumps such that the low and high pressure pumps are driven at different speeds by the drive input.