| 摘要 |
The servovalve with torque motor consists of a cylindrical case ( 3 ) in which an armature ( 1 ) is arranged on one end of an arm ( 16 ) and a orifice ( 18 ) closing a nozzle ( 19 ) with working liquid ( 2 ) on the other side of the arm ( 16 ). The arm ( 16 ) is free to rotate round the pivot point of a flexible suspension ( 15 ) with a hole ( 21 ) of diameter corresponding to the maximum deflection of the arm ( 16 ). There are two magnetic pole shoes ( 5 ) and two electric pole shoes ( 4 ) located around the armature ( 1 ), equipped with sealing rings ( 6 ), and so the working liquid ( 2 ) filling the inside of the case ( 3 ) and surrounding the arm ( 16 ) and the armature ( 1 ) does not leak out of the inside space. Coils ( 7 ) are located outside the case ( 3 ). The pole shoes ( 4, 5 ) are equipped with threaded parts ( 12 ), fitting either into the outer ring ( 10 ) or the body ( 3 ). The magnetic pole shoes ( 5 ) are equipped with a non-magnetic protective housing ( 9 ). The servovalve solution minimizes flow of the working liquid ( 2 ) through the electromagnetic circuit area, separates this area from the working liquid ( 2 ) and facilitates adjustment of the torque motor characteristics. The servo valve is suitable for high pressures.
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