CN2126495U - Ring-type magnet yoke induction diathermy furnace - Google Patents
Ring-type magnet yoke induction diathermy furnace Download PDFInfo
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- CN2126495U CN2126495U CN 92202915 CN92202915U CN2126495U CN 2126495 U CN2126495 U CN 2126495U CN 92202915 CN92202915 CN 92202915 CN 92202915 U CN92202915 U CN 92202915U CN 2126495 U CN2126495 U CN 2126495U
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- yoke
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Abstract
The utility model relates to a ring-type magnet yoke induction diathermy furnace with higher electrical efficiency and natural power factor. The ring-type magnet yoke induction diathermy furnace is formed by adding a circular yoke and a bar-shaped yoke at the end parts and the outside of an induction coil of an existing induction diathermy furnace, so that the magnetic flux in a heated workpiece is gathered by the yokes. A ring-type yoke is characterized in that the ring-type yoke is composed of a circular yoke and a bar-shaped yoke, wherein, the yoke is formed by stacking silicon steel sheets. The inner hole of the circular yoke is round or in other shapes, and the inner diameter of the inner hole is 1.05-1.2 times the diameter of the workpiece. The sensor formed so is firm and durable. The utility model has the advantages of approximate infinite external reactance, high electrical efficiency, big natural power factor, obvious electricity-saving performance and remarkable economic benefit.
Description
The utility model relates to a kind of induction diathermic furnace, is a kind of ring type yoke induction diathermic furnace with higher electrical efficiency and natural power factor.
In the prior art, induction diathermic furnace is mainly by grate. inductor. and be heated workpiece, conveying machinery etc. are partly formed.The external magnetic circuit of the inductor in this class diathermic furnace is via air, and its magnetic resistance is big, and the electrical efficiency of diathermic furnace and natural power factor are all lower, power frequency particularly, and the individual event induction diathermic furnace of frequency tripling batch operation is more obvious.Hot electrical efficiency η D1=42% in the list of references＜1〉in 50 hertz of power frequency diathermic furnaces of 119-126 page or leaf calculated example, natural power factor COS φ=0.165; Hot electrical efficiency η D1=69% during 150 hertz of frequency tripling diathermic furnaces of 259-263 page or leaf are given an example in the list of references＜2 〉, natural power factor COS φ=0.153; The curve of the 60th page of Fig. 2 .24 reflects corresponding to the electrical efficiency of the blank diathermic furnace in two calculated example in front also have only between the 50%-60% (curve is to be 6.4 centimetres with air gap, is different from 8.5 centimetres and 8 centimetres of above-mentioned two examples) in the list of references＜3 〉.
List of references
＜1〉Xi-an Inst. of Electric Furnace, first OTS of Ministry of Machine-Building Industry, induction heating is used and the device design experience, China Machine Press, chapter 5 in 1974.
＜2〉Pan Mingtian, power frequency and intermediate frequency furnace, metallurgical industry publishing house, chapter 6 in 1981, the 5th joint.
＜3〉［ English ］ John. the Davis; Peter. Simpson's work, Zhang Shufang etc. translate, induction heating handbook, National Defense Industry Press, chapter 2 in 1985.
The purpose of this utility model provides a kind of induction diathermic furnace, and a kind of have higher electrical efficiency and a natural power factor ring type yoke induction diathermic furnace.
The purpose of this utility model is achieved in that in the induction coil outside sets up yoke, yoke is that annular yoke and bar shaped yoke constitute, the annular yoke places the coil two ends, several bar shaped yokes and ring-shaped yoke an iron rake with three to six teeth connect, become a closed magnetic path at coil shape, the inductor that the coil liner is such and the solidfied material in the outside and yoke are formed solid, a compact integral body, constitute robust inductor; Can be installed on the grate very easily.The annular yoke has dwindled the air gap between workpiece end and yoke effectively, the flux concentrating in the workpiece can be imported yoke, suppresses end magnetic flux scattering, the external reactance Xo convergence infinity of inductor.The intervention coefficient of charging resistance is carried to approaching 1 by about 0.25 in the former technology, so that can think that furnace charge gets involved resistance R ' equate with charging resistance R.
ηD1＝R′／R1＋R＝1／M×R／1／M×R＋R1＝R／R＋MR1
ηD2＝R／R＋R1
In the formula: the electrical efficiency in the η D1---prior art;
η D2---the utility model electrical efficiency;
R1---single turn system coil resistance;
The 1/M---charging resistance is got involved coefficient, and the M value is between 3-5 usually.
As seen electrical efficiency of the present utility model is higher than the electrical efficiency in the prior art, and to the result of calculation of power factor, natural power factor also increases.
Owing to adopt such scheme, the coil of inductor. furnace lining. yoke. solidfied material is organically integrated, and is sturdy and durable; Convenient by dress, effectively suppress the magnetic flux scattering.
Owing to adopt such scheme, the electrical efficiency of calculated example can reach 81.7% in the list of references＜1 〉, and natural power factor is increased to 0.214, economize on electricity 48%; Electrical efficiency in the list of references＜2〉can reach 91%, and natural power factor is increased to 0.252, economize on electricity 24%, and for the steel of non magnetic furnace charge, aluminium electric furnace and stepping three-phase diathermic furnace have above-mentioned unexpected technique effect and economic benefit too.
Owing to adopt such scheme, yoke and processing charges thereof increase about 0.2 ten thousand yuan the cost of inductor, but because the raising of natural power factor, under the identical prerequisite of the power factor after the compensation, the quantity of compensation condenser has reduced, from the total cost of electric furnace, the utility model cost is lower than the cost of prior art electric furnace.The amplitude that the total cost of diathermic furnace reduces: can be about 0.4 ten thousand yuan corresponding to the calculated example in the list of references＜1 〉, can be corresponding to the calculated example in the list of references＜2〉ten thousand yuan of 4-5.
Owing to adopt such scheme, capacitor. supply line. all corresponding reduction of the active loss of power supply unit, power supply unit. switchgear. supply line's sectional area all can correspondingly reduce, and the power savings and the economic benefit of visible this respect can not be ignored.
In sum, the utility model technical performance is superior, and the economic benefit of making us paying attention to is arranged.
Below in conjunction with accompanying drawing the utility model is further specified:
Fig. 1 is the front view of the utility model sensor structure;
Fig. 2 is the axial half-sectional view of the utility model sensor structure;
Among the figure: 1. be heated workpiece; 2. inductor coil; 3. inductor liner; 4. heat-barrier material;
5. stainless steel guide rail; 6. bar shaped yoke; 7. go into end ring shape yoke; 7 ' go out end ring shape
Yoke; 8. solidfied material; 9. stretching screw.
Among the figure, annular yoke (7) .(7 ') places going into end and going out end of coil (2), bar shaped yoke (6) and (7) .(7 ') overlap joint, stretching screw (9) is with (7) .(7 ') tension is at the two ends of (2), heat-barrier material (4) applies and penetrates in (2), manufacture the furnace lining (3) of refractory material then. apply and penetrate stainless steel guide rail (5), filling concrete solidfied material (8) between (2) and (6) at last.
Annular yoke (7) .(7 ' among the figure) be symmetrical, be to form (the most handy mould is processed) on forcing press by 0.35 millimeter silicon steel sheet processing back closed assembly, its endoporus can be circular hole or other shape according to being heated workpiece, and the diameter value of its endoporus doubly is heated the diameter of workpiece at 1.05-1.2; The bar shaped yoke is also formed by the silicon steel sheet closed assembly; The yoke magnetic conductive area is set according to the terminal voltage of inductor coil.
Claims (3)
1, a kind of ring type yoke induction diathermic furnace of being made up of inductor, grate, conveying machinery is characterized in that being provided with the ring type yoke outside inductor coil;
2, according to the described yoke induction diathermic furnace of claim 1., it is characterized in that yoke is made up of annular yoke and bar shaped yoke overlap joint, yoke is by the silicon steel sheet closed assembly;
3, by being the described annular yoke induction diathermic furnace of claim 2., it is characterized in that the endoporus of annular yoke may be the hole, garden according to the shape that is heated workpiece, also may be other shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92202915 CN2126495U (en) | 1992-02-20 | 1992-02-20 | Ring-type magnet yoke induction diathermy furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92202915 CN2126495U (en) | 1992-02-20 | 1992-02-20 | Ring-type magnet yoke induction diathermy furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2126495U true CN2126495U (en) | 1992-12-30 |
Family
ID=4949647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92202915 Granted CN2126495U (en) | 1992-02-20 | 1992-02-20 | Ring-type magnet yoke induction diathermy furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2126495U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108141926A (en) * | 2015-09-25 | 2018-06-08 | 康讯公司 | It is preheated for the large-scale blank electric induction of heat processing technique |
| CN110753411A (en) * | 2019-10-23 | 2020-02-04 | 樊承亮 | Magnetic yoke body of induction heating furnace |
-
1992
- 1992-02-20 CN CN 92202915 patent/CN2126495U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108141926A (en) * | 2015-09-25 | 2018-06-08 | 康讯公司 | It is preheated for the large-scale blank electric induction of heat processing technique |
| CN110753411A (en) * | 2019-10-23 | 2020-02-04 | 樊承亮 | Magnetic yoke body of induction heating furnace |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |