CN2046675U

CN2046675U - Energy saving electromagnet

Info

Publication number: CN2046675U
Application number: CN 89211502
Authority: CN
Inventors: 谈敏振; 张明智
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-08
Filing date: 1989-03-08
Publication date: 1989-10-25

Abstract

The utility model discloses an energy saving electromagnet, which belongs to the technical field of the electromagnet and adopting two magnet coil structures. When in starting, the two coils are electrified and generate a powerful magnetic field, making an iron core move. After the electromagnet is attracted, a coil is automatically switched off. Because a moving iron core contacts a fixed core, and the reluctance is very small, so long as a minor holding current can hold the required electromagnetic attracting force. The holding current is only 5% of a starting current, so the electromagnet has obvious energy-saving effect. The electromagnet is provided with a protecting cover and a reset spring and has the advantages of small size, light weight, reliable motion, long service life, etc.

Description

Energy saving electromagnet

The utility model relates to a kind of pair of solenoid electromagnet, belongs to the electromagnet technical field.

Existing electromagnet all is to adopt single solenoid, and when initial condition, owing between moving iron core and the fixed core bigger space is arranged, magnetic resistance is bigger, can move when the initial condition in order to guarantee moving iron core, must feed electric current greatly in solenoid.After the iron core adhesive, magnetic resistance diminishes, if original electric current is constant in the maintenance solenoid, then electromagnetic attraction just increases, and instead says it, if keep the suction-combining force constant, then the electric current in the solenoid just can reduce after the adhesive, if the electric current when still keeping original startup behind electromagnetic actuation, this obviously is a kind of waste of the energy, in long occasion of electromagnetic actuation time, this waste is particularly evident.

The purpose of this utility model is to overcome the existing big shortcoming of electromagnet energy consumption, design a kind of when initial condition, in solenoid, feed bigger starting current, after the electromagnetic core adhesive, the electric current in the solenoid can be automatically switched into the energy-saving electromagnet of less electric current again.And on the structure of electromagnet, make improvements, make it to have advantages such as the little and long service life of volume.

Formation of the present utility model is to have adopted two coil configuration, and one of them coil is an actuating coil, and the line footpath is thicker, can feed big electric current under the same number of turn and same voltage, produces than high-intensity magnetic field, and another coil is a hold-in winding, and the line footpath is thinner.When starting, actuating coil and hold-in winding are all connected direct voltage, there is big electric current to pass through in the actuating coil, produce than high-intensity magnetic field and make the electromagnet action.One push rod is arranged in the fixed core of electromagnet, and a conductive ring is equipped with in the push rod rear end, can connect the circuit of actuating coil and external power by conductive ring.In the electromagnetic actuation process, promptly moving iron core is when moving near the attracted position, and moving iron core ejects push rod automatically, moves after making conductive ring, cuts off the actuating coil circuit.At this moment the gap between moving iron core and the fixed core is quite little, and magnetic resistance is quite little, and the magnetic field that relies on hold-in winding to produce thus guarantees that enough moving iron core continues motion, until complete adhesive.Electromagnetism electricity after the adhesive has only and is connected with less current in the hold-in winding, and the total current of whole electromagnet reduces greatly.In order to guarantee that the electromagnet after the adhesive can bear bigger pulling force and impact, the moving iron core of electromagnet and the faying face of fixed core are designed to the circular cone cooperation, increase contact area, reduce magnetic resistance.

Accompanying drawing 1 is a structure chart of the present utility model;

Accompanying drawing 2 is the structure chart of conductive ring and actuating coil contact;

Accompanying drawing 3 is an electrical schematic diagram of the present utility model.

The utility model is described in further detail below in conjunction with drawings and Examples.As shown in Figure 1, whole electromagnet is by housing 2 supporting, and fixed core 1 is fixed in the housing 2, and moving iron core is removable with relative fixed core on axis direction 1.Be with solenoid outside iron core, this solenoid comprises and starts solenoid 3 and keep solenoid 4, keeps solenoid 4 around internal layer, starts solenoid 3 around skin, they around to identical.The inner termination of moving iron core 5 is a truncated cone-shaped, and fixed core 1 inner termination has the protruding hole of a truncated cone-shaped, and when moving iron core 5 adhesives, the inner termination of moving iron core 5 is circular cone with the inner termination of fixed core 1 and cooperates.There is a keyway 7 side of moving iron core 5, studs with key 6 in the keyway 7, and key 6 is fixed on the housing 2, and under the effect of key 6, moving iron core 5 can only move axially and can not rotate.Be embedded with an elastic collar 11 on the external end head of moving iron core 5, there is a baffle plate 10 elastic collar 11 back.Have a back-moving spring 9 to be enclosed within on the moving iron core 5, an end of back-moving spring 9 withstands on the baffle plate 10, and the other end withstands on the housing 2.For after the electric current of solenoid all is cut off, moving iron core 5 can be returned to initial position again under the active force of back-moving spring 9.Be with a telescopic rubber sheath 8 at back-moving spring 9 skins, the effect of this rubber sheath 8 is dustproof, to guarantee the cleaning of moving iron core 5 movable parts, guarantees that promptly moving iron core 5 motion over a long time is flexible.At the center of fixed core 1 push rod 19 is arranged, this push rod 19 is removable with respect to fixed core 5, is with conductive ring 12, insulated ring 14 and contact spring 13 successively at the external end head of push rod 19.When initial condition, conductive ring 12 is being pressed under the active force of contact spring 13 on the contact 17 and external power contact 18 that starts solenoid 3, as accompanying drawing 2, shown in the accompanying drawing 3.Be connected to startup solenoid 3 between the

electrical wiring head

16 and 17, be connected to maintenance solenoid 4 between the

electrical wiring head

16 and 18, electrical wiring head 16 is the public head of two solenoids.During use, one of power supply terminates on the electrical wiring head 16, the other end is connected on the electrical wiring head 18, energized, one road electric current directly feed and keep solenoid 4, and another road electric current feeds through conductive ring 12 and starts solenoid 3, in coil, generate an electromagnetic field iron core 5 is moved, the result that moving iron core 5 moves inward push up push rod 19 backward and hits, and conductive ring 12 is thrown off from electric contact simultaneously, starts solenoid 3 interior electric currents and is cut off.Good in order to guarantee electric contact, be with a rubber sleeve 15 at the tail end of electromagnet.

The utility model keeps the different of required electric current according to electromagnet when starting from after the adhesive, adopt two coil configuration, one of them actuating coil can cut off behind electromagnetic actuation automatically, according to requirement of engineering, the electric current of keeping the electromagnetic actuation state only has 5% of starting current, therefore has obvious energy-saving effect. In addition, it is little, in light weight that this electromagnet also has a volume, the advantages such as reliable in action and long service life, and it is big to be specially adapted to pulling force, the various occasions that stroke is long and grow pickup time.

Claims

1, a kind of energy-saving electromagnet, by fixed core 1, moving iron core 5, housing 2, and solenoid constitutes, it is characterized in that, described solenoid keeps solenoid 4 around internal layer by starting solenoid 3 and keeping solenoid 4 to constitute, and starts solenoid 3 around skin, around to identical, moving iron core is a truncated cone-shaped with inner termination, and fixed core 1 inner termination has prominent of a truncated cone-shaped pit and the truncated cone-shaped of moving iron core 5 inner termination to be circular cone to cooperate, and moving iron core 5 sides has a keyway 7, stud with key 6 in the keyway 7, key 6 is fixed on the housing 2, and moving iron core 5 external end heads are embedded with elastic collar 11, and a baffle plate 10 is arranged behind the elastic collar 11, there are back-moving spring 9 one ends to withstand on the baffle plate 10, the other end withstands on the housing 2, is with a rubber sheath 8 outside back-moving spring 9, at fixed core 1 center one push rod 19 is arranged, the external end head of push rod 19 is with conductive ring 12 successively, insulated ring 14 and contact spring 13, the tail end cover rubber sleeve 15 of electromagnet.