公开(公告)号：US09494080B2

公开(公告)日：2016-11-15

申请号：US14246760

申请日：2014-04-07

申请人： ROLLS-ROYCE CONTROLS AND DATA SERVICES LIMITED

发明人： David Nicholas Neate ,  Jonathan Masters

IPC分类号： F02C7/236 ,  F04C11/00 ,  F04C15/00 ,  F04B23/12 ,  F02C7/14 ,  F02C7/16 ,  F04C2/18

CPC分类号： F02C7/236 ,  F02C7/14 ,  F02C7/16 ,  F04B23/12 ,  F04C2/18 ,  F04C11/005 ,  F04C15/0096 ,  F04C2210/1044 ,  Y02T50/675 ,  Y10T137/6579

摘要： A fuel pumping unit has a low pressure pump, a high pressure pump, and a drive input which drives the low and high pressure pumps. The low pressure pump supplies, in use, fuel at a boosted pressure to the high pressure pump. The fuel pumping unit further has a low pressure housing containing the low pressure pump, and a high pressure housing containing the high pressure pump. The housings are joined together at a housing interface. The drive input is contained in one of the housings, whereby drive from the drive input is transferred across the interface to the pump in the other housing. The housing interface includes a gap which interposes between the high pressure pump and the low pressure pump. A layer of substantially stagnant fuel is trapped, in use, in the gap to reduce heat transfer from the high pressure pump to the low pressure pump.

摘要翻译： 燃油泵单元具有低压泵，高压泵和驱动低压泵和高压泵的驱动输入。 低压泵在使用中向高压泵提供增压的燃料。 燃料泵送单元还具有容纳低压泵的低压壳体和容纳高压泵的高压壳体。 壳体在壳体接口处连接在一起。 驱动输入装在其中一个壳体中，从而驱动输入的驱动通过接口传递到另一壳体中的泵。 壳体接口包括介于高压泵和低压泵之间的间隙。 基本停滞的燃料层在使用中被捕获在间隙中，以减少从高压泵到低压泵的传热。