公开(公告)号：WO1991017379A1

公开(公告)日：1991-11-14

申请号：PCT/US1991001769

申请日：1991-03-15

Applicant: APPLIED POWER INC.

Inventor： APPLIED POWER INC. ,  STOBBS, Thomas, J. ,  PATEL, Kishor, J. ,  FRITZ, Frank, M. ,  KNUTSON, Dale, A. ,  JANECKE, James, P.

IPC: F16K31/06

CPC classification number: F16K31/0668 ,  B60G17/056 ,  F16F9/46 ,  F16K31/0648 ,  F16K31/0658

Abstract: A direct-operated, two-way solenoid valve is disclosed. The valve balances the hydraulic flow forces acting on a poppet (24) in order to achieve fast-acting, high-flow operation. The valve has a housing (12) with the poppet (24) mounted in a main bore. The poppet (24) has a sealing end (66) with a longitudinal central bore (70) that is open at the sealing end and terminates in a pressure wall (72). A radial cross bore (74) in the poppet provides fluid communication between the central bore (70) and an outlet port (22) formed in the housing. The sealing end (66) of the poppet may contact a valve seat (82) to prevent fluid communication between an inlet port and the central bore of the poppet. The sealing end (66) of the poppet is biased into contact with the valve seat (82) to prevent fluid communication between the inlet port (20) and the central bore. An actuator (16) generating a magnetic flux path tends to move the poppet out of contact with the valve seat (82).

Abstract translation: 公开了一种直接操作的双向电磁阀。 阀平衡作用在提升阀（24）上的液压流动力，以实现快速作用，高流量运行。 阀具有壳体（12），其中提升阀（24）安装在主孔中。 提升阀（24）具有密封端（66），纵向中心孔（70）在密封端处是敞开的并且终止于压力壁（72）。 提升阀中的径向横向孔（74）在中心孔（70）和形成在壳体中的出口（22）之间提供流体连通。 提升阀的密封端（66）可接触阀座（82）以防止入口和提升阀的中心孔之间的流体连通。 提升阀的密封端（66）被偏置成与阀座（82）接触，以防止入口（20）和中心孔之间的流体连通。 产生磁通路径的致动器（16）趋于使提升阀与阀座（82）脱离接触。

公开(公告)号：WO1993016286A1

公开(公告)日：1993-08-19

申请号：PCT/US1993000597

申请日：1993-01-29

Applicant: APPLIED POWER INC.

Inventor： APPLIED POWER INC. ,  OMBERG, Carl-Johan ,  JANECKE, James, P.

IPC: F15B11/05

CPC classification number: E02F9/2225 ,  F15B11/165 ,  F15B2211/20538 ,  F15B2211/20553 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/324 ,  F15B2211/50536 ,  F15B2211/50572 ,  F15B2211/515 ,  F15B2211/5157 ,  F15B2211/528 ,  F15B2211/575 ,  F15B2211/6054 ,  F15B2211/6055 ,  F15B2211/615 ,  F15B2211/7053 ,  F15B2211/71

Abstract: A hydraulic circuit (10) for controlling the speed of multiple hydraulic fluid power devices (18, 20) when the flow demand of the devices (18, 20) exceeds the flow capacity of a pressure source (6) supplying hydraulic fluid under pressure to the devices (18, 20) has multiple pressure controlled proportional flow supply valves (24) for controlling the supply of hydraulic fluid to the power devices (18,20). Load sense pressures which indicate the pressure delivered by the valves (24) to the corresponding devices (18, 20) are compared to determine the highest load sense pressure, which is compared to the supply pressure by a proportional speed sensing valve (94) to regulate the pilot pressure. In the preferred embodiment, the pilot pressure is regulated by the proportional speed sensing valve (94) to be equal to the differential between the supply pressure and the highest load sense pressure, and a limit control (231, 247) is provided in one form (215) of the proportional speed sensing valve. Thus, when the differential between supply pressure and the highest load sense pressure starts falling, as occurs when the flow demand exceeds the flow capacity of the pump (6) the pilot pressure is reduced, which reduces flow to the power devices (18, 20) proportionally to reduce the speeds of the devices (18, 20) while maintaining substantially constant the proportions of the speeds to one another.