A direct-acting electro-hydraulic proportional valve driven by a bidirectional permanent magnet linear force motor

An electro-hydraulic proportional valve, motor-driven technology, applied in valve details, valve devices, engine components, etc., can solve problems such as poor specific force characteristics, achieve high power/weight ratio, compact structure, and improve linearity.

Active Publication Date: 2019-07-09
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the zero dead zone in the initial stage of the proportional solenoid, the traditional proportional solenoid valve has poor specific force characteristics in small signal control, and two proportional solenoid valves are needed to drive the spool when two-way driving is realized.

Method used

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  • A direct-acting electro-hydraulic proportional valve driven by a bidirectional permanent magnet linear force motor
  • A direct-acting electro-hydraulic proportional valve driven by a bidirectional permanent magnet linear force motor
  • A direct-acting electro-hydraulic proportional valve driven by a bidirectional permanent magnet linear force motor

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Embodiment Construction

[0025] The present invention is specifically described below by the embodiment, only for further illustrating the present invention, can not be interpreted as the limitation of protection scope of the present invention, the technical engineer of this field can make some non-essential improvements and improvements to the present invention according to the content of the above-mentioned invention Adjustment.

[0026] like figure 1 As shown, the present invention includes a left end cover 1, a manual return lever 2, a left yoke 3, a return spring 4, a bidirectional permanent magnet linear force motor 5, a centering spring A6, a valve body 7, a sleeve 8, a valve sleeve 9, and a valve Core 10, centering spring B11, right end cover 12, adjusting screw 13, set screw 14; one side of the two-way permanent magnet linear force motor is directly connected with the valve core 10 through the push rod 15, and the other side is connected with the valve core 10 by the left end cover 1, manual ...

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Abstract

The invention discloses a direct-acting electro-hydraulic proportional valve driven by a bidirectional permanent magnet linear force motor. Valve body, sleeve, valve sleeve, valve core, adjusting screw, set screw, etc.; one side of the two-way permanent magnet linear force motor is directly connected to the valve core through an armature and a push rod, and the other side is directly connected to the valve core by a left end cover and a manual reset lever. , the left end cover, and the manual reset mechanism composed of the return spring; the valve sleeve is fixed in the cylindrical hole of the valve body, one side is limited by the right yoke in the bidirectional permanent magnet linear force motor through the sleeve, and the other side is limited by the right end cover Position limit; the valve core is supported in the valve sleeve, one side is directly connected to the push rod in the bidirectional permanent magnet linear force motor, and the other side is connected to the centering spring B. It has the advantages of compact structure, bidirectional control, proportional control characteristics, fast response, etc., and can be widely used in electro-hydraulic proportional / servo control systems.

Description

technical field [0001] The invention relates to an electro-hydraulic proportional valve in a fluid control system, in particular to a direct-acting electro-hydraulic proportional valve driven by a bidirectional permanent magnet linear force motor. Background technique [0002] The direct-acting electro-hydraulic proportional valve uses a high-power driver to directly drive the spool. It has the advantages of strong anti-pollution ability, compact structure, and no pilot stage leakage. It is widely used in electro-hydraulic proportional control systems in national defense and civil industries. . Traditional proportional solenoid valves mainly use proportional electromagnets to drive the spool to generate displacement and thus complete the flow or pressure output proportional to the input voltage. Due to the zero dead zone in the initial stage of the proportional solenoid, the traditional proportional solenoid valve has poor specific force characteristics in small signal cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/08
CPCF16K31/082
Inventor 李勇谷璐璐黄庆林申允德玄东吉成泰洪李振哲任明
Owner WENZHOU UNIV
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