CN101214572A - Technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core - Google Patents
Technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core Download PDFInfo
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- CN101214572A CN101214572A CNA2008100451208A CN200810045120A CN101214572A CN 101214572 A CN101214572 A CN 101214572A CN A2008100451208 A CNA2008100451208 A CN A2008100451208A CN 200810045120 A CN200810045120 A CN 200810045120A CN 101214572 A CN101214572 A CN 101214572A
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Abstract
The invention discloses a bulb tubular hydraulic generator pole core assembly welding technique which including: (1) welding on a pole mandril and a pole pressure pad; preheating the body of a workpiece before welding and adopting various welding material and small current to weld by times; using an asbestos cloth to cover for heat preservation after welding; (2) welding on a damp strip and a pole punching sheet; adopting preheating plus argon-arc welding and plus heat preservation after welding. The invention has the advantages of solving the technique quality problems of not melting between welding materials and welding crack, and ensuring the requirements of reliability and quality for welding.
Description
Affiliated field
The present invention relates to a kind of water wheel generator polecore assembling process, particularly technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core.
Background technology
For hydrogenerator, bulb passes through the hydrogenerator pole core a distinguishing feature, and promptly the pole core length-width ratio is very big, belongs to elongated class iron core.If carry out power station pole core assembling by traditional vertical assembly method, can't ordinary production, every technology quality index after the also very difficult simultaneously effectively assurance assembling unshakable in one's determination, welding sequence occupies the very long cycle in the pole core assembly work, play a part very important.The quality problems of welding directly have influence on the running quality of generator itself, and even service life.
Generally speaking, the stacking factor of pole core assembling requires to reach 0.985, pole sheet pressure behind the iron core pressure mounting is 15-25kg/cm, being pole core exists very big interior at tension force in the back well at closed assembly, do not having under the situation of screw-threaded coupling, guarantee globality unshakable in one's determination and be connected tightness, this just requires the magnetic pole core rod firmly necessary with the welding of pole end-plate, but, because the material of plug and pressing plate is different, be mild steel and high-carbon steel, the welding melting between mild steel and the steel alloy itself is just very difficult in other words, and it is very serious that tendency is split in its weldering.Be different from light water and send out the assembling of machine pole core because bulb passes through the assembling unshakable in one's determination of hydrogenerator magnetic sheet, the quantity of amortisseur bar seldom in its pole core, when moving, motor just exist magnetic pole amortisseur bar current density bigger thus, the amortisseur bar heating is heavier, the amortisseur bar distortion is bigger, softening degree is higher, even the danger that has the amortisseur bar axial float or be thrown out of.
Summary of the invention
Purpose of the present invention promptly is to overcome the shortcoming of prior art, and a kind of molten mutually technical quality problems with weld crack of wlding that solves is provided, and can guarantee the technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core of welding reliability and quality requirement.
Purpose of the present invention is achieved through the following technical solutions: technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core, it comprises: the welding of (1) magnetic pole plug and pole end-plate, the weld preheating workpiece body, and adopt different scolders, little electric current gradation welding, postwelding asbestos cloth covering and heat insulating at unlike material; (2) welding of amortisseur bar and pole lamination is adopted preheating to add argon arc welding and is added postweld heat preservation again.
By top narration as can be seen, the present invention has the following advantages: solved the molten mutually technical quality problems with weld crack of wlding, guaranteed welding reliability and quality requirement.
The specific embodiment
The present invention will be further described below in conjunction with embodiment: technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core, it comprises: (1) generally speaking, the stacking factor of pole core assembling requires to reach 0.985, pole sheet pressure behind the iron core pressure mounting is 15-25kg/cm, being pole core exists very big interior at tension force in the back well at closed assembly, do not having under the situation of screw-threaded coupling, guarantee globality unshakable in one's determination and be connected tightness, this just requires the magnetic pole core rod firmly necessary with the welding of pole end-plate, but, because the material of plug and pressing plate is different, be mild steel and high-carbon steel, the welding melting between mild steel and the steel alloy itself is just very difficult in other words, and it is very serious that tendency is split in its weldering, we adopt following method to solve, be the weld preheating workpiece body, and adopt different scolders at unlike material, little electric current gradation welding, the postwelding method of asbestos cloth covering and heat insulating, substantially solve the problem of bead crack, guaranteed welding reliability and quality requirement.
(2) because bulb passes through the assembling unshakable in one's determination of hydrogenerator magnetic sheet is different from light water and sends out the assembling of machine pole core, the quantity of amortisseur bar seldom in its pole core, when moving, motor just exist magnetic pole amortisseur bar current density bigger thus, the amortisseur bar heating is heavier, the amortisseur bar distortion is bigger, softening degree is higher, even the danger that has the amortisseur bar axial float or be thrown out of.And the welding of amortisseur bar and pole lamination is exactly the effective measures of taking in order to address the above problem, and guarantees reliability, the compactness that amortisseur bar contacts with pole lamination because of welding on the one hand, increases heat and distributes, and reduces the thermal deformation of amortisseur bar; Other direction is the axial location relative fixed that guarantees amortisseur bar because of welding, guarantees the reliability service of motor.So, how effectively to weld amortisseur bar here and just become the key of problem with pole lamination.A kind of is the higher ferrous metal of silicon content (punching), and a kind of is non-ferrous metal copper (amortisseur bar).Common wlding welding can not be burn-on; Pre-thermal weld also has crackle: there is very big defective in manual silver-bearing copper weldering.Through repeatedly groping test, finally adopt preheating to add the method that argon arc welding adds postweld heat preservation again, solved the molten mutually technical quality problems with weld crack of above-mentioned wlding finally.
Claims (1)
1. technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core, it is characterized in that: it comprises: the welding of (1) magnetic pole plug and pole end-plate, the weld preheating workpiece body, and adopt different scolders, little electric current gradation welding, postwelding asbestos cloth covering and heat insulating at unlike material; (2) welding of amortisseur bar and pole lamination is adopted preheating to add argon arc welding and is added postweld heat preservation again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100451208A CN101214572A (en) | 2008-01-07 | 2008-01-07 | Technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100451208A CN101214572A (en) | 2008-01-07 | 2008-01-07 | Technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101214572A true CN101214572A (en) | 2008-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100451208A Pending CN101214572A (en) | 2008-01-07 | 2008-01-07 | Technique for assembling welding bulb through-flow type waterwheel generator magnetic pole iron core |
Country Status (1)
| Country | Link |
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| CN (1) | CN101214572A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105324204A (en) * | 2013-07-03 | 2016-02-10 | Posco公司 | Method for manufacturing electrical steel sheet laminated core having reduced core loss and increased strength, and laminated core produced by the same |
-
2008
- 2008-01-07 CN CNA2008100451208A patent/CN101214572A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105324204A (en) * | 2013-07-03 | 2016-02-10 | Posco公司 | Method for manufacturing electrical steel sheet laminated core having reduced core loss and increased strength, and laminated core produced by the same |
| CN105324204B (en) * | 2013-07-03 | 2018-07-27 | Posco公司 | The reduction of manufacture core loss and the method for the increased electrical sheet laminated core of intensity and the laminated core produced by this method |
| US10265795B2 (en) | 2013-07-03 | 2019-04-23 | Posco | Method for manufacturing electrical steel sheet laminated core having reduced core loss and increased strength, and laminated core produced by the same |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080709 |