公开(公告)号：WO2018125321A1

公开(公告)日：2018-07-05

申请号：PCT/US2017/051300

申请日：2017-09-13

Applicant: PARKER-HANNIFIN CORPORATION

Inventor： MORGAN, Aaron, Michael ,  KASHID, Bipin ,  SEIDEL, Charlie

IPC: F16K11/07 ,  F16K31/06

CPC classification number: F16K11/0708 ,  E21B33/06 ,  F15B13/0405 ,  F15B20/008 ,  F15B21/047 ,  F15B2013/004 ,  F15B2013/008 ,  F15B2013/041 ,  F15B2211/8609 ,  F16K31/0613

Abstract: An example valve includes: (i) a valve body defining a longitudinal cavity, where the valve body includes a supply inlet and an operating outlet; (ii) a cage disposed in the longitudinal cavity, where the cage includes (a) a first opening fluidly coupled to the supply outlet, and (b) a second opening fluidly coupled to the operating outlet; and (iii) a spool mounted within the cage and configured to move axially therein. When the valve is actuated, the spool moves within the cage to form a gap, thereby allowing pressurized fluid to flow from the supply inlet through the first opening, the gap, and the second opening to the operating outlet. A flow area defined around an exterior peripheral surface of the spool changes upstream from the gap at a first rate, and changes downstream from the gap at a second rate that is different from the first rate.