CN2172507Y

CN2172507Y - Thermoelectric electromagnet

Info

Publication number: CN2172507Y
Application number: CN 93213530
Authority: CN
Inventors: 刘燕杰
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-26
Filing date: 1993-05-26
Publication date: 1994-07-20
Anticipated expiration: 2003-05-26

Abstract

The utility model relates to a thermoelectric electromagnet. On the basis of the existing one-way thermoelectric electromagnet, two-way of thermocouples replace an original one-way thermocouple, and a U-shaped iron core made of cold strip silicon steel replaces an original low-carbon steel cylindrical iron core, so the thermoelectric electromagnet is formed. The thermoelectric current produced by the utility model is much stronger; the structure of the iron core is much simpler; the manufacturing is much easier; moreover, residual magnetism is not easy to reserve. The two-way thermocouples are sheathed on two poles of the U-shaped iron core and fixed on a bracket, and are respectively heated at hot ends and cooled at cold ends. Thus, the phenomenon of thermoelectricity is demonstrated sufficiently.

Description

Thermoelectric electromagnet

The utility model relates to the device that has thermocurrent when a kind of indication has the temperature difference in the closed-loop path that different metal materials is formed.

At present, known thermoelectric magnet structure mainly is made of in proper order cylinder-shaped iron core, single channel thermocouple and armature.Its iron core processes with low-carbon steel material, and complex-shaped, processing difficulties keeps remanent magnetism easily.＜physics demonstration experiment〉book of compiling according to Chen Xi arch-plotter as can be known, the magnetic effect that is produced by the single channel thermocouple is more remarkable not as good as the magnetic effect that the two-way thermocouple produces.(referring to Chen Ximou＜physics demonstration experiment〉p155, Higher Education Publishing House, 1986)

The purpose of this utility model provides a kind of like this thermoelectric magnet, and not only its core structure is simple, and is simple for production, be difficult for keeping remanent magnetism, and the thermocurrent that produces is stronger, externally produces stronger magnetic effect.

The purpose of this utility model is achieved in that the copper bar bending is welded into square type loop, and a face down bonding connects straight fire end, and the rectangular colling end of opposite side welding bending is welded on the constantan bar in the middle of the copper rectangular-shaped loops then, forms the two-circuit thermocouple; Make and the corresponding horseshoe type iron core of thermocouple size with cold-rolled silicon steel tape.This iron core is difficult for keeping remanent magnetism, and the lower end of iron core should process and be polished into smooth plane, and suspension ring are fixed in the punching of iron core upper center, also can directly adopt CD series miniature transformer iron core (typing series of products); With the thick iron plate of 6-8mm it is simultaneously polished and to be processed into and core section armature of the same size, burn-on one at the armature another side and can hang the counterweight ring of counterweight, the armature also CD sections core of available same model replaces.When doing the teaching demonstration experiment, iron core is suspended on the support, insert in the two-way thermocouple at iron core the two poles of the earth, fix with fixed screw, heat with spirit lamp in its hot junction then, cold junction is inserted in the cold water-cup cool off, can produce the thermocurrent of two-way parallel connection, make the iron core magnetization, hold armature and can on the counterweight ring, carry additionally counterweight.

Owing to adopted such scheme, both can make the thermoelectric pole core simple in structure, easy to make, again can economical with materials, be difficult for keeping remanent magnetism, and because the thermocurrent that the two-way thermocouple produces is stronger, magnetic effect is bigger, and it is more remarkable to make it the difference of temperature demonstrated as a kind of teaching demonstration instrument.

Below in conjunction with drawings and Examples the utility model is further specified:

Fig. 1 is the structural front view of thermoelectric magnet embodiment.

Fig. 2 is an iron core front view among the thermoelectric magnet embodiment.

Fig. 3 is an iron core left view among the thermoelectric magnet embodiment.

Fig. 4 is a two-way thermocouple vertical view among the thermoelectric magnet embodiment.

Fig. 5 is a two-way thermocouple front view among the thermoelectric magnet embodiment.

Fig. 6 is an armature front view among the thermoelectric magnet embodiment.

Fig. 7 is an armature left view among the thermoelectric magnet embodiment.

Among the figure: 1. iron core 2. two-way thermocouples 3. constantans 4. bronze medals 5. hot junctions 6. cold junctions, 7. armature, 8. spirit lamps, 9. cold water-cups, 10. supports, 11. counterweights

In the embodiment shown in fig. 1, iron core (1) is to adopt cold-rolled silicon steel tape to make CD12.5*25*60 series horseshoe type iron core (typing series of products), suspension ring are fixed in the middle part punching, have easy processing, the difficult characteristics (as Fig. 2, shown in Figure 3) that keep remanent magnetism.The two-way thermocouple is by copper (4) and constantan (3) be welded (as Fig. 4, shown in Figure 5).Two-way thermocouple (2) is enclosed within on the two poles of the earth of iron core (1), fix with fixed screw, be hung on the support (10), use spirit lamp (8) when hot junction (5) and heat, cold junction (6) inserts when cooling off in the cold water-cup (9), the middle generation of two-way thermocouple (2) thermocurrent in parallel, make iron core (1) magnetization, hold armature (7), it is above and do not come off to carry additionally 8kg on the counterweight ring of armature, with its significant magnetic effect difference of temperature of having given counterevidence.

Claims

1, a kind of thermoelectric magnet is combined by iron core, thermocouple and armature, it is characterized in that: adopt the two-way thermocouple to be enclosed within on the two poles of the earth of U-shaped core, iron core lower end and armature combine.

2, thermoelectric magnet according to claim 1 is characterized in that: horse-hof shape iron core or CD series miniature transformer iron core that the iron core of electromagnet adopts the cold rolled silicon steel carrying material to make.

3, thermoelectric magnet according to claim 1 is characterized in that: the thermocouple of electromagnet is the two-way thermocouple that adopts copper and constantan to be welded.