Hydraulically powered rotary actuator
AssigneeWeir Minerals Australia Ltd.
InventorMarcelo Rademacher
Life of this patent
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Abstract
A hydraulically powered rotary actuator is described including: a hydraulic linear actuator which is moveable in both directions between a retracted position and an extended position; a clutch device which is operable between an engaged condition and a disengaged condition; and a rotary output member; wherein the linear actuator is coupled to the rotary output member by way of the clutch.
Claims8
A centrifugal pump comprising a first hydraulically powered rotary actuator for incrementally adjusting a gap distance between a side liner and an impeller of the centrifugal pump, the first hydraulically powered rotary actuator comprising:
- a first hydraulic linear actuator which is moveable in both directions between a retracted position and an extended position;
- a first clutch device which is operable between an engaged condition and a disengaged condition;
- and
- a first rotary output member,
- wherein the first hydraulic linear actuator is coupled to the first rotary output member by way of the first clutch device, and
- wherein the first hydraulically powered rotary actuator is controllable to effect individual step-wise incremental linear adjustments of the side liner of the centrifugal pump relative to the impeller of the centrifugal pump to maintain a gap distance between the side liner and the impeller, the linear adjustment of the side liner being effected by rotating the rotary output member;
- wherein each incremental adjustment is effected by the linear actuator moving from either its retracted position to its extended position, or from its extended position to its retracted position.
Dependencies are inferred from the claim text.