FIELD: machine building.
SUBSTANCE: present invention relates to a set of actuators for actuation of valve (3), in which at least one drive (5a, 5b) is used, comprising cylinder (29), piston (35), stoppers (37), at least one lower part (38) of the cylinder, which closes in the axial direction the open side of the cylinder and having external recesses (47), configured to receive stops, extending area of which interacts with groove (31) of cylinder, and removable fasteners (41) controlled by power supply (7), by means of gear rack (9) engaged with rotary elliptic gear (11) connected to coupling (13), so that one of them transmits torque to another. Gear rack of each drive device passes substantially across axis of rotation of gear by curve (90), corresponding to involute of at least part of main perimeter or diameter of gear. Connections between gear and gear rack, as well as coupling are detachable, so that support angular positions of gear in relation to gear rack and coupling can be adjusted according to specified change of torque required for actuation of valve.
EFFECT: valve actuator is disclosed.
6 cl, 22 dwg
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