Super magnetostrictive actuator driving single-stage direct-acting jet pipe servo valve

A giant magnetostrictive and actuator technology, applied in the direction of servo motor components, fluid pressure actuators, mechanical equipment, etc., can solve the problems of low natural frequency of torque motors, limited response speed capability, large inertia of jet tubes, etc., to achieve The effect of strong driving ability, large output force and high control precision

Inactive Publication Date: 2009-11-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Description
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Problems solved by technology

[0005] Whether it is the early ordinary jet tube servo valve or the later deflector plate type jet tube servo valve, its working reliability and work efficiency are much higher than that of the nozzle flapper servo valve, but its biggest disadvantage is the large inertia of the jet tube, which leads to the inherent torque motor part. The frequency is low, so

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  • Super magnetostrictive actuator driving single-stage direct-acting jet pipe servo valve
  • Super magnetostrictive actuator driving single-stage direct-acting jet pipe servo valve
  • Super magnetostrictive actuator driving single-stage direct-acting jet pipe servo valve

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[0025] Such as figure 1 , As shown in 2, 3, the new jet tube servo valve intends to design a new giant magnetostrictive actuator between the nozzle and receiver of the traditional deflecting plate jet tube servo valve, and the actuator will drive the distributor to replace the original deflected jet Tube servo valve torque motor and its driven deflector, the new type of flow distributor is directly driven by the giant magnetostrictive actuator and designed as an integrated structure, while fixing the jet nozzle and jet receiver, the dynamic response of the jet hydraulic amplifier is completely determined by The giant magnetostrictive actuator is determined to avoid the restriction on the dynamic response of the system by directly driving the jet tube with large inertia. At the same time, the giant magnetostrictive actuator has the advantages of faster response speed and stronger load capacity than torque motors, so While ensuring the reliability of the jet tube servo valve, it ca...

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Abstract

The invention discloses a super magnetostrictive actuator driving single-stage direct-acting jet pipe servo valve, and belongs to the technical field of hydraulic servo control. The servo valve comprises a valve body (16), a flow distributor (8), a pair of electro-mechanical converters, and a pair of micrometric displacement amplifiers positioned between the electro-mechanical converters and the flow distributor (8), wherein each electro-mechanical converter comprises a thermal compensation hood (5), a super magnetostrictive rod (10) mounted in the thermal compensation hood, and a coil frame (2) positioned outside the thermal compensation hood (5), and also comprises a drive coil (4) and a bias coil (3) which are orderly wound outside the coil frame (2); each micrometric displacement amplifier comprises a cylinder, a big piston (9) arranged at one end of the cylinder and connected with the corresponding super magnetostrictive rod (10); and the other end of the cylinder is connected with the flow distributor (8). The jet pipe servo valve has obvious characteristics of quick response, big driving power and control flow, and the like.

Description

technical field [0001] The invention relates to the application of giant magnetostrictive materials and belongs to the technical field of hydraulic servo control. Background technique [0002] The traditional structure of the jet tube servo valve is generally composed of torque motor, jet tube, nozzle, double receiver, etc. The torque motor is used to drive the deflection of the jet tube, and the deflection of the jet tube can change the pressure and flow in the double receiver. The flow change can be used to drive the slide valve or the hydraulic actuator in the small and medium power hydraulic servo system, and the control of the slide valve or the hydraulic actuator can be realized by controlling the output force and displacement of the torque motor. [0003] Due to the small output power of the torque motor, the early jet tube servo valves mostly adopted a two-stage structure, as described in Document 1 (Analysis and Design of Hydraulic Control Systems, edited by Lu Chan...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 朱玉川李跃松鲍和云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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