公开(公告)号：WO2006098830A1

公开(公告)日：2006-09-21

申请号：PCT/US2006/004573

申请日：2006-02-09

Applicant: CATERPILLAR INC. ,  HEFLER, Greg, W. ,  RUSHTON, Dan ,  SHAFER, Scott, F. ,  STEWART, Chris, L. ,  STOCKNER, Alan, R.

Inventor： HEFLER, Greg, W. ,  RUSHTON, Dan ,  SHAFER, Scott, F. ,  STEWART, Chris, L. ,  STOCKNER, Alan, R.

IPC: F02M55/00 ,  F02M63/02 ,  F02M59/10 ,  F02M39/00 ,  F02M59/08 ,  F04B1/04

CPC classification number: F02M39/005 ,  F02M55/002 ,  F02M59/06 ,  F02M59/102 ,  F02M59/44 ,  F02M63/0225 ,  F04B1/0408 ,  F04B1/0448 ,  F04B23/103 ,  F04B53/143

Abstract: Mixing of lubrication fluid and pumped fluid within a pump can undermine lubricity of the lubrication fluid and/or contaminate the pumped fluid (e.g. fuel) with lubrication fluid. In order to reduce mixing of fluids within a high pressure pump (14) of the present disclosure, a lubrication fluid is supplied to the high pressure pump (14). A low pressure pump (15) supplies a second fluid to the high pressure pump (14). The pressure of the second fluid is increased within at least one piston bore (33) of the high pressure pump (14). Mixing of the lubrication fluid and the second fluid is reduced by fluidly connecting a weep annulus (40) which is opened to the at least one piston bore (33) to a low pressure pump inlet (26) of the low pressure pump (15).

Abstract translation: 泵内的润滑流体和泵送液体的混合可以破坏润滑流体的润滑性和/或用润滑流体污染泵送的流体（例如燃料）。 为了减少本公开的高压泵（14）内的流体的混合，向高压泵（14）供给润滑流体。 低压泵（15）将第二流体供应到高压泵（14）。 第二流体的压力在高压泵（14）的至少一个活塞孔（33）内增加。 通过将打开的冲击环（40）与至少一个活塞孔（33）流体连接到低压泵（15）的低压泵入口（26）来减少润滑流体和第二流体的混合， 。