Two-stage jet nozzles series super-magnetostrictive jet servo valve and operating method thereof
A technology of giant magnetostriction and giant magnetostrictive rod, applied in servo motor components, fluid pressure actuating devices, mechanical equipment, etc., can solve the problem of increasing structural complexity, driving complexity, demagnetization phenomenon that cannot be adjusted in time, Affecting GMA control accuracy and other issues, achieving the effects of reliable micro-displacement amplification, convenient magnification adjustment, and reduced radial size
Inactive Publication Date: 2011-11-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
[0004] There are several defects in this kind of servo valve and its working method: it is driven by two giant magnetostrictive electro-mechanical converters, which increases the complexity of the structure and drive; it is necessary to ensure that the temperatures of the two giant magnetostrictive rods are equal, The thermal expansion must be equal to ensure that the servo valve is less affected by temperature; the bias magnetic field is generated by the energized coil, because the bias magnetic field strength is required to be constant when the servo valve is working and the bias magnetic field strength is relatively large, so the bias coil heats up seriously , and the cooling system design is not carried out, which
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[0054] like figure 1 , 2 and 3, the new two-stage jet nozzle series giant magnetostrictive jet servo valve includes an upper end cover 4, a lower end cover 26, an outer cover 6, an inner threaded hole processed in the center of the axis of the upper end cover 4, and distributed in the inner Oil leakage channel 3 on both sides of the threaded hole, cable outlet channel 1; left leakage oil channel 23, right leakage oil channel 20, left and right valve core installation cavities machined on both sides of the centerline of lower end cover 26; upper end cover 4 and outer cover 6 It is fixed by connecting screws 7, and the lower end cover 26 and the outer cover 6 are fixed by connecting screws 15;
[0055] The adjusting screw 2 is installed in the inner threaded hole of the upper end cover 4 and its lower end surface is in contact with the slider 32 and can push it to move axially. The rod 14, along the axial direction of the giant magnetostrictive rod 14, is sequentially installed...
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The invention relates to a two-stage jet nozzles series super-magnetostrictive jet servo valve and an operating method thereof, which belong to the field of a hydraulic servo control technique. The two-stage jet nozzles series super-magnetostrictive jet servo valve provided by the invention comprises an upper end cover (4), a lower end cover (26), a super-magnetostrictive rod (14), an output rod (21), a coil skeleton (8), a polarization magnetic filed generating unit and a driving magnetic field generating unit, wherein the upper end cover (26) is provided with a left valve core installation cavity (45) and a right valve core installation cavity (46) which are symmetrical relative to the axis of the output rod; a group of valve core components are respectively installed in the left valve core installation cavity (45) and the right valve core installation cavity (46); and wedge-shaped amplification mechanisms are formed in the contact positions of the output rod (21) and the left and the right valve core installation cavities. The two-stage jet nozzles series super-magnetostrictive jet servo valve provided by the invention has the advantages of great pressure gain and rapid response, and the driving part has the obvious characteristics of small heat radiation, adjustable polarization magnetic filed, intelligentized effect 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 servo valve is generally composed of a torque motor, a jet tube, a nozzle, a 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 change can be used to drive the spool valve or the hydraulic actuator in the small and medium power hydraulic servo system, and the control of the spool valve or the hydraulic actuator can be realized by controlling the output force and displacement of the torque motor. [0003] Document 1 (two-phase opposed giant magnetostrictive self-sensing force feedback two-stage servo valve and control method, Wang Xinhua, national invention patent, patent application number: 200710178688.2) proposed a g...
Claims
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Inventor 朱玉川王传礼李跃松成奇峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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