CN102255410A - Welding structure and welding method for motor rotor bar and rotor end ring - Google Patents
Welding structure and welding method for motor rotor bar and rotor end ring Download PDFInfo
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- CN102255410A CN102255410A CN201010176400XA CN201010176400A CN102255410A CN 102255410 A CN102255410 A CN 102255410A CN 201010176400X A CN201010176400X A CN 201010176400XA CN 201010176400 A CN201010176400 A CN 201010176400A CN 102255410 A CN102255410 A CN 102255410A
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Abstract
The invention belongs to the technical field of motors and discloses a welding structure and a welding method for a motor rotor bar and a rotor end ring. The welding structure comprises a rotor bar and a rotor end ring, wherein an end ring annular slot is formed on the rotor end ring; an end ring concave slot is formed in the end ring annular slot; and the rotor bar is welded in the end ring concave slot. The welding method is as follows: using an intermediate-frequency electric welder to integrally weld the rotor bar with the rotor end ring, wherein a silver-based solder is taken as a solder and a silver-based soldering flux is taken as a soldering flux. The welding structure and welding method provided by the invention have the advantages that an improved welding structure for the motor rotor bar and the rotor end ring and an industry frequency soldering process are used for solving the following problems: (1) the filling for an welding joint between the rotor bar and the rotor end ring is inferior and the phenomena of welding joint pore, slag inclusion, non-satiation and roughness are easily caused, and (2) the cross section of an end ring of a motor rotor above 500 kilowatt is larger, the rated capacity of the intermediate-frequency electric welder is higher and the end ring is difficult to process.
Description
Technical field
The invention belongs to technical field of motors, is motor rotor cage bar and rotor end ring Welding Structure and technology specifically.
Background technology
The colliery is very fast with motor development recently, the primary requirement that volume is little, power has become the user greatly.When the motor rated voltage still keeps former numerical value constant, the increase of rated power will make the motor rated current increase, and rotor current also strengthens gradually like this.Rotor end ring plays the effect of short-circuited conducting sleeve in motor operation course, so the electric current that flows in the end ring is also quite big, at end ring and each cage bar touching position is the weakest link, the melting welding phenomenon easily takes place, thereby cause rotor broken bar, cracking, the motor three-phase current unbalance burns motor when serious; On welding technique, see on the other hand, the selection of adopting manual flame brazing method or scolder not at that time, between cage bar and end ring the weld seam calking bad, easily cause to have pore, slag inclusion in the weld seam; Not full, rough phenomenon; Motor rotor end ring cross section is bigger more than 500 kilowatts, and manual flame can't weld at all.Therefore need a kind of rotor cage bar of above-mentioned phenomenon generation and the Welding Structure and process implementation method of end ring avoided.
Summary of the invention
At the technical problem of above-mentioned existence, the objective of the invention is to disclose a kind of motor rotor cage bar and rotor end ring Welding Structure and welding method.Concrete scheme is as follows:
A kind of motor rotor cage bar and rotor end ring Welding Structure comprise rotor cage bar 1 and rotor end ring 2, and described rotor end ring 2 is provided with end ring annular groove 10, in the described end ring annular groove 10 end ring groove 9 are set also, and described rotor cage bar 1 is welded in the described end ring groove 9.
For reaching better technique effect, the scolder in the described end ring annular groove 10 is identical with the degree of depth of end ring annular groove 10.
The invention also discloses a kind of welding method that realizes said structure, adopt the intermediate frequency electric welding machine, rotor cage bar 1 and end ring 2 is integrally welded, and used scolder is the money base brazing solder, and used solder flux is the money base soldering paste;
When described brazing solder selected the trade mark to be BAg45CuZn, welding temperature was 750～785 ℃; When selecting the trade mark to be Bag25CuZn, welding temperature is 800～835 ℃; The soldering paste trade mark is QJ-102.
Beneficial effect of the present invention is: 1. between cage bar and end ring the weld seam calking bad, easily cause the generation of weld porosity, slag inclusion, not full, rough phenomenon; 2.500 motor rotor end ring cross section is bigger more than kilowatt, intermediate frequency welding machine rated capacity is bigger, is difficult for the problem of processing.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the rotor end ring structural representation.
Fig. 3 is a B-B cutaway view among Fig. 2.
Wherein: 1 is rotor cage bar; 2 is rotor end ring; 3 is rotor punching; 4 is the end ring bottom surface; 5 is weld tabs; 6 is scolder; 7 is end ring top; 8 is the end ring bottom; 9 is the end ring groove; 10 is the end ring annular groove.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples:
Embodiment 1: as Fig. 1～shown in Figure 3, first-selected rotor cage bar 1 is inserted in the end ring groove 9, the rotor rotation is erected, be placed on the workbench of intermediate frequency welding machine, use bolted.The induction coil of end ring bottom surface 4 with the intermediate frequency welding machine contacted; In the rotor cage bar 1 insertion end ring groove 9, in end ring top 7, end ring bottom 8, put into the weld tabs 5 and the scolder 6 of capacity; Cooperate frock rotor to be placed on ready work on the medium frequency welding machine worktable as insulation asbestos pad etc.; Open the intermediate frequency welding machine, induction coil makes between rotor cage bar 1 and the end ring 2 and produces electric current, rotor cage bar 1 rises with end ring 2 temperature, the size of selecting welding current according to the thickness and the rotor number of end ring, make weld tabs 5 fusing fast between end ring and cage bar, add the single-end ring groove 9 that weld tabs 5 will cross the cage bar up to the weldering water of fusing more gradually and reach end ring annular groove 10 position height, make the whole melting welding of a plurality of cage bars become integral body.
Prepare before the weldering: the surface of rotor end ring groove 9, end ring annular groove 10, rotor cage bar 1 and solder weld tabs is stained with clean burlap spills smart wiped clean.
The selection of scolder:
The brazing solder trade mark is that the suitable welding temperature of BAg45CuZn is 750 ℃, and the soldering paste trade mark is QJ-102 (fluorinated potassium 42%, boric anhydride 35%, a potassium fluoborate 23%)
Embodiment 2: with not being all of embodiment 1: welding temperature is 785 ℃.
Embodiment 3: with not being all of embodiment 1: the brazing solder trade mark is Bag25CuZn, and welding temperature is 800 ℃.
Embodiment 4: with not being all of embodiment 3: welding temperature is 835 ℃.
。
Claims (4)
1. motor rotor cage bar and rotor end ring Welding Structure, comprise rotor cage bar (1) and rotor end ring (2), it is characterized in that: described rotor end ring (2) is provided with end ring annular groove (10), end ring groove (9) also is set in the described end ring annular groove (10), and described rotor cage bar (1) is welded in the described end ring groove (9).
2. motor rotor cage bar as claimed in claim 1 and rotor end ring Welding Structure is characterized in that: the scolder in the described end ring annular groove (10) is identical with the degree of depth of end ring annular groove (10).
3. motor rotor cage bar and rotor end ring welding method, it is characterized in that: adopt the intermediate frequency electric welding machine, rotor cage bar (1) and end ring (2) is integrally welded, and used scolder is the money base brazing solder, and used solder flux is the money base soldering paste.
4. welding method as claimed in claim 3 is characterized in that: when described brazing solder selected the trade mark to be BAg45CuZn, welding temperature was 750～785 ℃; When selecting the trade mark to be BAg25CuZn, welding temperature is 800～835 ℃; The soldering paste trade mark is QJ-102.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010176400XA CN102255410A (en) | 2010-05-19 | 2010-05-19 | Welding structure and welding method for motor rotor bar and rotor end ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010176400XA CN102255410A (en) | 2010-05-19 | 2010-05-19 | Welding structure and welding method for motor rotor bar and rotor end ring |
Publications (1)
| Publication Number | Publication Date |
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| CN102255410A true CN102255410A (en) | 2011-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010176400XA Pending CN102255410A (en) | 2010-05-19 | 2010-05-19 | Welding structure and welding method for motor rotor bar and rotor end ring |
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| CN (1) | CN102255410A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692451A (en) * | 2012-05-21 | 2012-09-26 | 江苏常牵庞巴迪牵引***有限公司 | Rotor end ring brazing quality detection process |
| CN104022605A (en) * | 2014-06-24 | 2014-09-03 | 永济新时速电机电器有限责任公司 | Motor rotor end ring-guide bar medium-frequency induction brazing verifying tooling and method |
| CN105364247A (en) * | 2015-12-22 | 2016-03-02 | 南车株洲电机有限公司 | Anti-cracking welding method for end ring and conducting bar of motor rotor and anti-cracking soldered joint |
| CN109167487A (en) * | 2018-09-30 | 2019-01-08 | 攀钢集团工程技术有限公司 | Improve the method for maintaining of winding motor rotor performance |
| CN109848502A (en) * | 2019-03-08 | 2019-06-07 | 西安阿尔斯通永济电气设备有限公司 | Rotor cage bar and end ring welding machine table and welding method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692451A (en) * | 2012-05-21 | 2012-09-26 | 江苏常牵庞巴迪牵引***有限公司 | Rotor end ring brazing quality detection process |
| CN104022605A (en) * | 2014-06-24 | 2014-09-03 | 永济新时速电机电器有限责任公司 | Motor rotor end ring-guide bar medium-frequency induction brazing verifying tooling and method |
| CN105364247A (en) * | 2015-12-22 | 2016-03-02 | 南车株洲电机有限公司 | Anti-cracking welding method for end ring and conducting bar of motor rotor and anti-cracking soldered joint |
| CN105364247B (en) * | 2015-12-22 | 2017-08-25 | 南车株洲电机有限公司 | The anticracking welding method and anticracking soldered fitting of motor rotor end ring and sliver |
| CN109167487A (en) * | 2018-09-30 | 2019-01-08 | 攀钢集团工程技术有限公司 | Improve the method for maintaining of winding motor rotor performance |
| CN109167487B (en) * | 2018-09-30 | 2020-06-23 | 攀钢集团工程技术有限公司 | Maintenance method for improving performance of wound motor rotor |
| CN109848502A (en) * | 2019-03-08 | 2019-06-07 | 西安阿尔斯通永济电气设备有限公司 | Rotor cage bar and end ring welding machine table and welding method |
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Application publication date: 20111123 |