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Servovalve with torque motor

  • US 7,234,482 B2
  • Filed: 03/21/2005
  • Issued: 06/26/2007
  • Est. Priority Date: 03/22/2004
  • Status: Active Grant
First Claim
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1. A servovalve with a torque motor consisting of a cylindrical case, in which an armature is arranged on one end of an arm and an orifice closing a nozzle on the other end of the arm, while the arm is free to rotate in a central part between the arm and the orifice around a pivot point of a flexible suspension, and there are two magnetic pole shoes opposite to each other and two electric pole shoes with coils, turned by 90°

  • from the magnetic pole shoes, both the magnetic pole shoes and the electric pole shoes are located in the cylindrical case around the armature, whereas distal ends of the magnetic pole shoes and the electric shoes that are farther from the armature are connected by an outer ring, wherein the arm including the armature is surrounded by working liquid, which fills inside space of the cylindrical case, the magnetic and electric pole shoes are equipped with sealing rings on their ends extending inside the cylindrical case, and the coils are located on a part of the electric pole shoes extending outside of the inside space of the cylindrical case that is filled with the working liquid.

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