Control valve for rotary hydraulic servoactuating mechanism - has hollow casing with valve and manifold sections, oil-ports, and oil-paths through spindle

摘要

The servo control valve (10) is constructed with a hollow casing (1) provided with a pressurized oil feeding port (5) and a pressurized oil discharging port (6) and a spindle (3) provided with a pair of internal oil paths (7) and (8) bored mutually in parallel in the axial direction and mounted oil-tight in the casing (1). The casing (1), in one half thereof (e.g., left side), is provided with a section defining a valve portion (25), and, in its remaining half part with a section defining a manifold portion (4). This manifold portion (4) consists of two chambers of (4A and 4B) each of which is connected to a desired hydraulic rotary servo mechanism, e.g. hydraulic actuating chambers on both sides of the hydraulic actuating cylinder through appropriate pipings.