Importance

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Abstract

Servo-valve that controls fluid discharged from a nozzle discharge port by displacing the nozzle, and that drives an actuator. The servo-valve includes a receiver having an inflow surface provided with a first inflow port, and a second inflow port into which fluid discharged from the discharge port flows. The nozzle includes a force generation portion having an end surface provided with the discharge port, and an outer circumferential surface formed on the periphery of the end surface. Displacing the nozzle from neutral position toward the first inflow port blows the fluid inside the second inflow port out toward the nozzle. The force generation portion collides with the fluid blown out from the second inflow port, causing assisting force in a direction matching the direction of nozzle displacement toward the first inflow port. The nozzle easily moves by the assisting force generated in the force generation portion, improving response speed.

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First Claim