CN212900016U - High-voltage direct-current resistant electromagnet - Google Patents

Abstract

The utility model discloses a high voltage direct current resistant electro-magnet, include: the magnetic shield comprises a stop iron 1, an armature 2, a magnetism isolating ring 3, a guide sleeve 4, a sealing cover 5, a manual push rod 6, a push rod 7, a first O-shaped ring 8, a second O-shaped ring 9, a coil 10, a screw cap 11 and a third O-shaped ring 12. Wherein the guide sleeve 4 is made of semi-austenitic steel. The armature 2 is enclosed in the guide sleeve 4. Use the embodiment of the utility model provides a pair of high voltage direct current resistant electromagnet optimizes traditional wet-type electromagnet's structure, has adopted neotype electromagnetic guide sleeve material and neotype technology, the quality and the production efficiency of the electro-magnet of improvement.

Description

High-voltage direct-current resistant electromagnet

Technical Field

The utility model relates to a hydraulic pressure product technical field especially relates to a high voltage resistant direct current electro-magnet.

Background

The electromagnetic valve is a conversion element between a hydraulic control system and an electric appliance control system. The suction force of the electrified electromagnet is utilized to push the spool of the slide valve to move, and the on-off of oil flow is changed, so that the reversing, starting and stopping of the actuating element are realized.

The electromagnet is one of important parts of the electromagnetic reversing valve, the variety and specification and the working characteristic of the electromagnet are selected, and the characteristic design of mutual matching of the electromagnet and the valve has great influence on the mechanism and the working performance of the electromagnetic reversing valve. At present, the electromagnet is divided into AC and DC electromagnets and dry and wet electromagnets. The iron core and armature of the electromagnet used in the prior electromagnetic valve are laminated silicon steel sheets, and hydraulic oil is not allowed to enter the electromagnet, so the electromagnet is sealed by an O-shaped sealing ring. Electromagnets in which such an armature moves in air are generally referred to as dry electromagnets. Its disadvantages are: the O-shaped ring is abraded by the action friction of the push rod for a long time, so that the gap between the O-shaped ring and the push rod is enlarged to leak oil, and the sealing ring is more troublesome to replace when the valve is in a high-pressure state. The friction resistance between the O-shaped ring and the push rod is large, and under certain conditions, the friction resistance may be higher than the electromagnetic force, so that the armature is clamped, and the coil is burnt. Such sealing arrangements require maintaining concentricity between the spool valve and the seals at both ends, and for this reason some form of flexible connection is often employed between the spool valve and the push rod to prevent premature failure of the seals, thereby increasing the cost of the valve. The armature of the lamination stack, which cannot withstand impact loads for a long time, tends to have a much lower life than the valve and to operate with a very loud noise. To prevent the influence of the surrounding environment on the electromagnet, a housing supported by a die-cast part or a metal sheet is often used for covering. The overall dimension is increased, and the heat dissipation capacity of the coil is reduced. In recent years, an electromagnet in which an armature moves in hydraulic oil is used and is called a wet electromagnet. The wet electromagnet overcomes the defects of a dry electromagnet, cancels the dynamic seal of an O-shaped ring, reduces impact and noise, and has larger output force than the dry electromagnet in the same size.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high voltage resistant direct current electro-magnet optimizes the structure of traditional wet-type electro-magnet, has adopted neotype electromagnetic guide sleeve material and neotype technology, the quality and the production efficiency of the electro-magnet of improvement.

In order to achieve the above object, the utility model provides a high voltage direct current resistant electromagnet, include: the device comprises a stop iron, an armature, a magnetism isolating ring, a guide sleeve, a sealing cover, a manual push rod, a first O-shaped ring, a second O-shaped ring, a coil, a screw cap and a third O-shaped ring;

one end of the guide sleeve is welded on the stop iron, the other end of the guide sleeve is welded on the sealing cover, and the manual push rod provided with the O-shaped ring is installed inside the sealing cover before laser welding;

the armature is arranged in the guide sleeve and can move axially;

the magnetic isolation ring is arranged between the armature and the stop iron, the coil is arranged outside the electromagnetic tube formed after welding, the nut is screwed on the thread of the sealing cover to fix the coil, a sealing ring is arranged between the nut and the coil, and the push rod is placed in the hole of the stop iron, so that electric energy is converted into electromagnetic force through the coil to do work to drive the armature, thereby pushing the push rod and achieving the purpose of reversing the electromagnetic valve.

In one implementation, the guide sleeve is made of semi-austenitic steel.

In one embodiment, the armature is enclosed in the guide sleeve.

Use the embodiment of the utility model provides a pair of high voltage direct current resistant electromagnet optimizes traditional wet-type electromagnet's structure, has adopted neotype electromagnetic guide sleeve material and neotype technology, the quality and the production efficiency of the electro-magnet of improvement.

Drawings

Fig. 1 is a schematic structural diagram of a high voltage direct current resistant electromagnet according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Please refer to fig. 1. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Fig. 1 the utility model provides a high voltage direct current resistant electromagnet, include: the magnetic shield comprises a stop iron 1, an armature 2, a magnetism isolating ring 3, a guide sleeve 4, a sealing cover 5, a manual push rod 6, a push rod 7, a first O-shaped ring 8, a second O-shaped ring 9, a coil 10, a screw cap 11 and a third O-shaped ring 12.

One end of the guide sleeve is welded on the stop iron, the other end of the guide sleeve is welded on the sealing cover, and the manual push rod provided with the O-shaped ring is installed inside the sealing cover before laser welding;

the armature is arranged in the guide sleeve and can move axially;

the magnetic isolation ring is arranged between the armature and the stop iron, the coil is arranged outside the electromagnetic tube formed after welding, the screw cap is screwed on the thread of the sealing cover to fix the coil, a sealing ring is arranged between the screw cap and the coil to play a role of dust prevention and water drainage, and finally the push rod is placed in a hole of the stop iron, so that electric energy is converted into electromagnetic force through the coil to do work to drive the armature, and the push rod is pushed to achieve the purpose of reversing the electromagnetic valve.

In one implementation, the guide sleeve 4 is made of semi-austenitic steel.

In one embodiment, the armature 2 is enclosed in the guide sleeve 4.

The guide sleeve 4 is a key part of the wet electromagnet, and high-pressure oil is introduced into the guide sleeve. The high pressure of the oil is divided into a constant pressure for a long time and a pressure in a pulse state caused by frequent commutation. Besides the oil pressure, the electromagnet needs to be impacted every time, so the guide sleeve needs to have a considerable strength. Since the guide sleeve surrounds the armature 2, the magnetic circuit between the armature 2 and the magnetic yoke is separated by the guide sleeve, and if the entire guide sleeve 4 is made of magnetic material, the attraction force of the electromagnet is significantly reduced because most of the magnetic flux does not pass through the working gap. If the whole guide sleeve is nonmagnetic, a magnetic circuit is isolated, the magnetic resistance is large, the coil excitation current is increased to cause serious heating, the size of a magnetic system is inevitably increased, and the defects are very unfavorable. In order to increase the compressive strength and durability of the guide sleeve, the wall thickness of the pipe must be increased, the magnetic resistance is increased along with the increase of the wall thickness, and the performance of the electromagnet is deteriorated. Therefore, if one part of the guide sleeve between the magnetic yoke and the magnetic circuit of the armature is made to be magnetic, and the other part is made to be non-magnetic, the magnetic circuit is not interrupted, the magnetic flux of the working gap is not reduced, and the performance of the electromagnet is improved, which is the key of the alternating current wet electromagnet.

The current production method of the guide sleeve is that a magnetic part and a non-magnetic part are made of different materials respectively and then welded together, like an alternating current electromagnetic tube produced by our company in the past, the non-magnetic guide sleeve uses stainless steel SUS304, and the magnetic guide sleeve uses SUS 630. When the guide sleeve is manufactured, the magnetic guide sleeve and the non-magnetic guide sleeve are required to be welded together firstly, then the magnetic part of the guide sleeve and the sealing cover are welded, and the non-magnetic part of the guide sleeve and the stop iron are welded. Both the inner and outer surfaces need to be machined and polished after welding.

The utility model discloses high pressure resistant electromagnetism pipe guide pin bushing magnetism and non-magnetism part are made with same kind of metal material, and this kind of method adopts precipitation hardening type's semi-austenite steel. The quenched structure of the stainless steel tube material is in a magnetic state, and the annealed structure is in a non-magnetic state. The direct current electromagnetic tube produced by the company skillfully applies the point,

the guide sleeve is made of SUS631 steel pipe, one end of the guide sleeve is kept in an original state, and the other end of the guide sleeve is annealed to obtain the magnetic part and the nonmagnetic part

Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (3)

1. A high voltage direct current resistant electromagnet, comprising: the device comprises a stop iron, an armature, a magnetism isolating ring, a guide sleeve, a sealing cover, a manual push rod, a coil, a screw cap and an O-shaped ring;

one end of the guide sleeve is welded on the stop iron, the other end of the guide sleeve is welded on the sealing cover, and the manual push rod provided with the O-shaped ring is installed inside the sealing cover before laser welding;

the armature is arranged in the guide sleeve and can move axially;

the magnetic isolation ring is arranged between the armature and the stop iron, the coil is arranged outside the electromagnetic tube formed after welding, the nut is screwed on the thread of the sealing cover to fix the coil, a sealing ring is arranged between the nut and the coil, and the push rod is placed in the hole of the stop iron, so that electric energy is converted into electromagnetic force through the coil to do work to drive the armature, thereby pushing the push rod and achieving the purpose of reversing the electromagnetic valve.

2. High voltage direct current resistant electromagnet according to claim 1, characterized in that the guide sleeve 4 is of semi-austenitic steel.

3. High voltage direct current resistant electromagnet according to claim 1 or 2, characterized in that the armature 2 is enclosed in the guide sleeve 4.

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