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High pressure resistant bilaterally rotating permanent proportion electro-magnet

A proportional electromagnet and two-way rotation technology, which is applied in the direction of electromagnets with armatures and electromagnets, can solve the problems of inability to directly drive the power stage spool, small output rotation angle and output torque, and small linear working range, etc., to achieve The effect of simple and reliable structure, small nonlinear error and large linear working range

Inactive Publication Date: 2008-04-23
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the torque motor for the pilot stage of a conventional servo valve has a high frequency response and high-voltage resistance characteristics, the output angle and torque are small, the linear working range is small, and it has a negative magnetic spring stiffness. The control characteristics are not good, and it cannot be directly driven. Power-level spool; in addition, conventional torque motors obtain high-pressure resistance characteristics through a pressure-isolation diaphragm with complex structure and difficult processing, which is expensive

Method used

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  • High pressure resistant bilaterally rotating permanent proportion electro-magnet
  • High pressure resistant bilaterally rotating permanent proportion electro-magnet
  • High pressure resistant bilaterally rotating permanent proportion electro-magnet

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Embodiment Construction

[0025] The present invention takes a quadrupole structure as an example, and the present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1, figure 2 , image 3 As shown, the present invention includes stator pole piece 7, armature rotor 14, yokes 3, 4, 5, 6, housing 2, control coils 8, 9, 10, 11, front end cover 1, rear end cover 12, bearing 13 The stator pole piece 7 is divided into four parts by the non-magnetic conductors 25, 26, 27, 28 evenly along the circumferential direction and welded into four parts, the magnetic conductors 21, 22, 23, 24, which can withstand high fluid pressure inside; The pole shoe 7 is fixed to the rear end cover 12, and the front end cover 1 and the rear end cover 12 are respectively fixed on the housing 2; the stator pole shoe 7 is equipped with an armature rotor 14, and the armature rotor 14 is composed of four permanent magnets arranged radially symmetrically. 15, 16, 17, 18 and rotatin...

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Abstract

The invention relates to a high-pressure resistant permanent bidirectional rotation ratio electric magnet, belonging to the electric-mechanical switch device used in the ratio valve and servo valve of fluid control system. The invention uses the stator pole shoe welded by non-magnetic material, which comprises the iron rotor formed by the permanent magnet and rotational axle; the outer surface of stator pole shoe is mounted with yoke which is coiled with controlling coil; the eccentric magnetic field generated by the permanent magnetic is differentially layered with the control magnetic field generated by the control coil; and the iron rotor can attain the output bidirectional and continuous torque which is in rate with the input signal. The invention has lower energy consumption, less delay ring, non-zero dead area, better stable and dynamic properties. The invention can be used to drive the valve core of ratio valve and servo valve.

Description

technical field [0001] The invention relates to an electro-mechanical conversion mechanism for a proportional valve and a servo valve in a fluid control system, in particular to a high-voltage-resistant permanent magnet bidirectional rotating proportional electromagnet. Background technique [0002] Although the traditional rotary proportional electromagnet has a large output angle and output torque, it can only provide one-way driving capability, and because the coil cavity communicates with the high-pressure oil cavity, it does not have high-voltage resistance characteristics. Although the torque motor for the pilot stage of a conventional servo valve has a high frequency response and high-voltage resistance characteristics, the output angle and torque are small, the linear working range is small, and it has a negative magnetic spring stiffness. The control characteristics are not good, and it cannot be directly driven. Power-level spool; in addition, conventional torque m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/14
Inventor 丁凡崔剑翁振涛
Owner ZHEJIANG UNIV
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