| 摘要 |
A spool location measurement sensor built-in hydraulic valve is provided to set up accurately and simply sensing location of a hole sensor and a permanent magnet. A hydraulic valve comprises a movable block(20) combined with a permanent magnet, adhered to a coupling(10) assembled to one end of a spool(201), moving together. A spring(40) is fitted in order to closely adhere the movable block against the coupling inside a housing(30) accommodating the movable block. A stroke measuring device(100a) comprises a cap(50) enclosing separation and housing of the spring tightly. A control valve(200) forms a spool hole(204) connected to a center bypass(203) operated by a hydraulic pump(202). A hydraulic line(205,206) is formed to feed and discharge working fluid into an actuator(300) on both sides of a spool hole around the center bypass. A valve block(209) is equipped with a tank line(208) connected to a recovery tank on the opposite side. |
