Novel composite proportional electromagnet

Abstract

The invention discloses a novel composite proportional electromagnet comprising a shell, a magnetic isolating ring, an armature, a left cover plate, a left pressure regulating nut, a right cover plate and a right pressure adjusting nut, wherein the magnetic isolating ring is sheathed in the shell; the armature is located in the magnetic isolating ring; the left pressure regulating nut is connected to a right end of the armature; the left cover plate is fixed on a left end of the shell; the right pressure adjusting nut is connected to the right end of the armature; and the right cover plate is fixed on the right end of the shell. According to the novel composite proportional electromagnet disclosed by the invention, the traditional magnetic isolating ring structure is replaced by a thin-walled structure, thereby simplifying the system structure, reducing the processing procedures and improving the production efficiency; the end face of the armature is changed to improve the electromagnetic attraction and improve the output force characteristics; and the pre-tightening forces acting on the two ends of the armature can be conveniently adjusted through pressure regulating springs to realize the adjustability of the acting force of the proportional electromagnet at a certain voltage or current. The novel composite proportional electromagnet disclosed by the invention is simple in structure, convenient to use and excellent in performance, can realize bidirectional displacement output, and can be directly connected with a valve core of a slide valve so as to control the bidirectional position proportion of the valve core of the slide valve.

Description

technical field [0001] The invention relates to the technical field of electromagnets, in particular to a proportional electromagnet which adopts a new magnetic isolation ring structure, conveniently adjusts the pretightening force acting on both ends of an armature, and increases the electromagnetic output force. Background technique [0002] The proportional electromagnet is an electric-mechanical conversion device of the electro-hydraulic proportional control element. Its function is to convert the current or voltage signal output by the proportional control amplifier into force or displacement in proportion. The electro-hydraulic proportional control system has a very important influence. The traditional proportional electromagnet structure generally includes a coil, a shell, an armature, and a magnetic isolation ring. For example, patent DE3309904 discloses a proportional electromagnet. The magnetic isolation ring is made of brass, a non-magnetic material. It needs to ...

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Problems solved by technology

The force of the existing proportional electromagnet at a certain voltage or current is generally constant and cannot be adjusted. If the working condition changes, it will take a lot of time to readjust so that the proportional solenoid can re-proportionately control the new working condition.

[0004] In addition, the end face of the traditional armature is generally flat. When the armature moves, the non-working air gap between the armature and the end cover pole shoe increases, the air reluctance and magnetic leakage increase, the electromagnetic force generated by the magnetic flux becomes smaller, and the utilization of magnetic energy rate reduction

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