FORCE FEEDBACK POPPET VALVE HAVING AN INTEGRATED PRESSURE COMPENSATOR

摘要

A force feedback poppet valve (10) includes a valve body (12) having a main chamber (14), a first port (16) and a second port (18). The force feedback poppet valve further includes a main poppet (20) disposed within the main chamber and movable between an open position and a closed position to control fluid flow between the first port and the second port. The main poppet may further form a control chamber (30) within the main chamber. The force feedback poppet valve further includes a first passage (50) communicating the control chamber with the second port and a second passage (96) communicating the control chamber with the first port. The force feedback poppet valve further includes a pilot valve (80) having a pilot poppet (82) for controlling fluid flow between the control chamber and the first port through a second passage (96). The force feedback poppet valve further includes a pressure compensator (52) disposed within the main poppet, and fluidly connected to the second port via the first passage. The force feedback poppet valve further includes a first spring (90) coupled between the main poppet and the pilot poppet to provide a force proportional to a distance between the main poppet and the pilot poppet, and a second spring (92) coupled between the pressure compensator and the pilot poppet to provide a force proportional to a distance between the pressure compensator and the pilot poppet.