HYDRAULIC POSITION ACTUATOR Russian patent published in 2012 - IPC F15B11/12 

FIELD: machine building.

SUBSTANCE: actuator includes pressure and drain hydraulic lines, hydraulic motor with outlet link kinematically connected to crane distributor operated with rough reading distributor, rough reading sensor, hydraulically operated valve installed in drain hydraulic line and distributor of hydraulically operated brake; in addition, actuator is equipped with distributor with electromagnetic control installed in pressure hydraulic line, and three-position distributor with hydraulic control one input and the first control element of which are connected by means of hydraulic lines to output of distributor with electromagnetic control; the other input of three-position distributor is connected to drain hydraulic line of hydraulic motor, and its second control element is connected to output of crane distributor the input of which is connected to output of rough reading distributor, the input of which is connected to pressure hydraulic line; note that output of three-position distributor is connected to cavity of hydraulically operated valve behind the valve, and crane distributor is equipped with independent movement setting device kinematically connected to it.

EFFECT: higher positioning accuracy.

1 dwg