CN2031573U

CN2031573U - Magnetic arc dc contactor

Info

Publication number: CN2031573U
Application number: CN 88211261
Authority: CN
Inventors: 路玉明
Original assignee: DANYANG LOW-VOLTAGE APPLIANCE FACTORY
Current assignee: DANYANG LOW-VOLTAGE APPLIANCE FACTORY
Priority date: 1988-05-03
Filing date: 1988-05-03
Publication date: 1989-01-25

Abstract

The utility model discloses a magnetic blowout DC contactor which is an improved low-tension DC contactor. A permanent magnet is used for forming a magnetic blowout system, which enables an electrical arc between contacts which are disconnecting to pull apart, and helps the electrical arc to extinguish fire. The utility model reduces abrasions between the contacts, and raises the service life of the contactor. The magnetic blowout DC contactor is suitable for the starting, the speed regulation, the reversing direction, and the lifting of battery driven vehicles whose supply voltage is lower than 96 volt (comprises 96 volt).

Description

Magnetic arc DC contactor

The utility model is the low-voltage direct contactor after a kind of the improvement, is applicable to that the battery driven vehicle of supply power voltage below 96 volts (comprising 96 volts) starts, speed governing, the D.C. contactor of the usefulness of commutation and lifting.

Existing D.C. contactor is by electromagnet, contact system, and damping spring, compositions such as auxiliary element, contactor have two kinds: a kind of for often opening double break point direct dynamic structure; Another kind is one often to open a normally closed double break point direct dynamic structure, the contact of contact system makes it closed by closed electromagnetic system plunger electromagnet, discharging reaction spring makes it to disconnect, probe of contactor produces electric arc in make and break process, electric arc produces high temperature and contact burnt deceive, burn, singe and produce metallic particles, directly influences D.C. contactor useful life.

The utility model provides the low-voltage direct contactor after a kind of the improvement, utilizes permanent magnet to produce magnetic field, and the electric arc that probe of contactor is produced between the contact that disconnects draws back, thereby helps arc extinction, improves the life-span that D.C. contactor uses.

Fig. 1 partly cuts open figure for magnetic blow-out formula D.C. contactor

Fig. 2 is a magnetic blow-out formula D.C. contactor end view

The utility model is that (Fig. 1, Fig. 2) low-voltage direct contactor of finishing as follows mainly contains pull-in winding (2), electromagnet (3), reaction spring (6), damping spring (5), static contact (8), the compositions such as moving contact (7). Inhale moving armature (4) when pull-in winding (2) energising makes electromagnet (3) magnetization produce gravitation, the moving contact (7) that drives contact system contacts with static contact (8) connects binding post (13) and binding post (15). A permanent magnet (9) is installed in static contact (8) below at moving contact (7) and binding post (15), there is insulating barrier isolated in permanent magnet (9) and the binding post (15), at the two poles of the earth of permanent magnet (9) a little iron (10) is installed respectively, is formed " U " shape type magnetic blow-out system. Control pull-in winding (2) reaction spring (6) disconnects the static contact (8) on movable contact (7) and the binding post (15), the arc spark that produces between the static contact (8) on moving contact (7) and the binding post (15) is under the effect of magnetic blow-out system, electric arc is pulled open, thereby help the electric arc fire extinguishing, have arc-chute (17) at arc extinguishing lid (12), arc-chute is that the heat that the electric arc of rectangle formation produces under the magnetic blow-out systemic effect passes through arc-chute (17) to external diffusion. In order to prevent that airborne dust from entering in the parts such as pull-in winding (2) electromagnet (3) reaction spring (6), the shell of contactor (11) is made Totally-enclosed-type, has improved like this intensity, can also keep away from moisture and the erosion of corrosive gas. It is 24 volts that the magnetic blow-out system can be used on rated operational voltage, and 30 volts, 40 volts, 48 volts, 72 volts, in the D.C. contactor of 80 volts and 96 volts, the rated operational current of its main contact is 50 amperes, 100 amperes, and 200 amperes and 400 amperes.

The utility model is on the basis of original low-voltage direct contactor, select for use permanent magnet (9) to be installed in and form the magnetic blow-out system under moving contact (7) and the fixed contact (8), the electric arc that is produced between the contact that disconnects is under the effect of magnetic blow-out system, electric arc is drawn back and help electric arc fire extinguishing, reduced contact like this owing to burning that electric arc produces, singe and produce the wear phenomenon of metallic particles, improved the life-span that contactor uses.

The magnetic blow-out system of magnetic blow-out formula D.C. contactor can be used on often to open and also can be used in one on the double break point direct dynamic structure and often open on the normally closed double break point direct dynamic structure, its binding post (15) (14) connects positive pole, binding post (13) (16) connects negative pole, the polarity of binding post can not reverse graft, pull-in winding joint (1) access control circuit is controlled magnetic blow-out formula D.C. contactor, can supply battery driven vehicle (storage battery forktruck, battery car, battery traction car) to make the usefulness of starting, speed governing and lifting like this.

Claims

1, one by pull-in winding (2), electromagnet (3), and reaction spring (6), fixed contact (8), the contactor that moving contact (7) and auxiliary element are formed is characterized in that at moving contact (7) and fixed contact (8) below installation alnico magnets (9).

2, according to the described contactor of claim 1, its feature is respectively installed a little iron (10) and is formed " U " shape type magnetic blow-out system at the two poles of the earth of permanent magnet (9).

3, according to claim 1 or 2 described contactors, its feature has insulating barrier isolated in permanent magnet (9) and binding post (15).

4,, it is characterized in that shell (11) makes enclosed type according to the described contactor of claim 1.

5,, it is characterized in that having arc-chute (17) on the arc extinguishing lid (12) according to the described contactor of claim 1.

6,, it is characterized in that operation DC voltage is no more than 96 volts according to the described contactor of claim 1.