| 摘要 |
<p>995, 572. Fluid-pressure servomotor control systems. SPERRY RAND CORPORATION. Feb. 27, 1963 [May 28,1962], No. 7889/63. Heading G3P. A spool valve 16, Figs. 1 and 3, controlling the supply and exhaust of fluid to a power device, is provide with two circumferential control chambers 17,18 separated by a wall 19. The pressure in the chambers 17,18 is controlled by a jet 12 which is movable relatively to a fixed diffuser opening 13 of greater length than the width of the wall 19. The pressure in chambers 17,18 is fed through passages 24, 23 and 26, 25 to act on piston members 21, 22 such that movement of the jet producing a pressure difference in the chambers 17,18 causes the valve 16 to move and recentre the wall 19 relative to the jet 12. The opening 13 is preferably arranged incimed to a radius of the valve 16 so that the valve is continuously rotated to prevent sticking. The jet 12 is supplied from an inlet 33, Fig. 2, which leads to a platform 31 through conduit 36 and groove 37. Flexible conduits 38 connect the groove 37 to a chamber 40 in an armature support 41 and a rigid pipe 45 connects this chamber to a block 30 and the jet pipe 12. A torque tube 44 connects the armature support 41 to the platform 31. The block 30 and armature support are connected to the housing by flexible members 42, 43 such that a signal fed to the . solenoid 11 rotates the armature and hence the jet tube 12 to actuate the valve 16 as described above. A feedback from the operated member, such as a control surface of an aircraft or missile, is provided by a linkage connected to a rod 47, the movement of which acts through an adjustable crank arm 50 and yoke 48 to rotate the platfrom 31, which through the torque tube 44 and armature support 41 rotates the jet pipe 12 to its central position thereby recentering the valve 16. The control surface may be actuated by three power devices each controlled by a separate jet and valve arrangement described above in which the valves 16 and the rods 47 are each interconnected respectively.</p> |
