The invention discloses a single-action reciprocating hydraulic
actuator. The single-action reciprocating hydraulic
actuator comprises a
hydraulic cylinder, an energy accumulator, a manual pump and ahydraulic power pack, wherein the hydraulic power pack is composed of a
fuel tank, a motor, a
gear pump, a proportional overflow valve and two one-way valves which are arranged on a hydraulic manifoldblock; the
hydraulic manifold block is fixed to the upper part of the
hydraulic cylinder; an oil way outlet of the
hydraulic manifold block is connected to a rod cavity of the
hydraulic cylinder through a pipeline; the energy accumulator is arranged at the lower part of the hydraulic cylinder in a sleeving mode and communicates with a rodless cavity of the hydraulic cylinder; the rod cavity and the rodless cavity of the hydraulic cylinder communicate with an
exhaust valve; and a
pressure sensor and a displacement sensor are arranged in a
system. The single-action reciprocating hydraulic
actuator has the advantages that when an emergency occurs and the
gear pump cannot work normally, the operation can be performed through the manual pump, and therefore
safe operation of the actuator can berealized; and the hydraulic
system is simple, the size of the
hydraulic manifold block is small, the integration degree is high, the bubble amount of the hydraulic
system is small, the safety and thereliability can be achieved, and the problems that when an existing actuator achieves the functions of single-direction output and reciprocating return
stroke, the structure of the hydraulic system is complex, the pipeline is complex, the bubble amount is large, and the heating value is high can be solved.