Fluid servo valve and fluid servo apparatus
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United States of America Patent
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Nov 5, 2019
Grant Date -
Aug 11, 2016
app pub date -
Feb 9, 2016
filing date -
Feb 10, 2015
priority date (Note) -
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Abstract
The present invention controls the pressure and flow rate of fluid, in order to obtain uniform performance, configure a closed loop magnetic circuit so as to include an electromagnet, a flapper, and a yoke material, and elastically deform the flapper itself by Maxwell attractive force generated between a magnetic pole of the electromagnet and the flapper to make the separation distance between the nozzle and the flapper variable. As opposed to a rigid flapper structure that swingably moves around a supporting point, like a conventional servo valve, the electromagnet, the magnetic pole, the nozzle, the flapper, and the like are arranged such that a change in magnetic gap directly leads to a change in air gap.
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