CN204030902U - A kind of rotor end ring structure for double cage motor or deep slot motor - Google Patents
A kind of rotor end ring structure for double cage motor or deep slot motor Download PDFInfo
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- CN204030902U CN204030902U CN201420418672.XU CN201420418672U CN204030902U CN 204030902 U CN204030902 U CN 204030902U CN 201420418672 U CN201420418672 U CN 201420418672U CN 204030902 U CN204030902 U CN 204030902U
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- cage bar
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Abstract
The utility model discloses a kind of rotor end ring structure for double cage motor or deep slot motor, comprise squirrel-cage bar and iron core (1), described squirrel-cage bar is connected with an end ring (2), and described end ring (2) as far as possible near-earth press close to described iron core (1).At circumferential three antimeres of described end ring (2), arrange that three reliably join compared with the thick described squirrel-cage bar of the squirrel-cage bar described in other and described end ring (2).The rotor end ring structure for double cage motor or deep slot motor that fracture can not occur when the utility model is a kind of use or reverse.
Description
Technical field
The present invention relates to a kind of rotor end ring structure of motor, particularly relate to a kind of rotor end ring structure for double cage motor or deep slot motor.
Background technology
Squirrel-cage motor simple structure, reliable, there is good operation characteristic, although its starting current is large, starting characteristic is poor, obtains extensive use in medium and small motor.Squirrel-cage motor starting characteristic is not so good as sliding ring type wire-wound motor, the necessary additional starting rheostat of the latter, and to reduce starting current and to increase starting torque, its structure is more complicated, troublesome poeration.Except indivedual particular job place, generally seldom adopt.For powerful motor, extensively adopt reasonable pair of squirrel-cage of starting characteristic or deep slot type (trapezoidal, rectangle) motor.Wherein double cage motor has more flexible, better starting characteristic than deep slot motor and is used widely.
Squirrel-cage motor rotor (containing cast-aluminum rotor) end ring its role is to by squirrel-cage bar in rotor at the two ends for copper (aluminium) encircle the short circuit that is connected, therefore be referred to as short circuit end ring, referred to as end ring.Squirrel-cage bar, outer squirrel-cage bar two ends were respectively with the short circuit that is connected of two copper interior end ring, outer end ring in double-cage rotor in the past, and interior squirrel-cage bar, outer squirrel-cage bar are installed on iron core, interior end ring, outer end ring all with iron core in a distance.
Double cage motor its power large >=200 kilowatts, during rotating speed higher (synchronous speed >=1000 rev/min), in actual motion, the outer mouse cage fracture of rotor bar Frequent Accidents (its breakaway poing is mostly at notch place).Particularly in frequent, the heavily loaded workplace of starting, its squirrel-cage bar fracture accident spy such as (as power plant coal) is many.User seldom adopts double cage motor in recent years.Then generally adopt deep slot motor.Wherein adopting maximum is trapezoidal deep slot motor.
Trapezoidal slot type motor is in rotating speed higher (synchronous speed >=1500 rev/min), and after motor work a period of time, rotor end ring reverses to the contrary aspect of direction of rotation, time have end ring joint sealing-off phenomenon to occur.
Based on all above, for solving two mouse cages place squirrel-cage bar phenomenon of rupture, occur, also for deep slot motor work is more reliable, it is necessary that two mouse cages and deep slot motor rotor end ring are done to suitable innovative design.
Summary of the invention
The rotor end ring structure for double cage motor or deep slot motor that fracture can not occur when technical problem to be solved by this invention is to provide a kind of use or reverse.
In order to solve the problems of the technologies described above, rotor end ring structure for double cage motor or deep slot motor provided by the invention, comprise squirrel-cage bar and iron core, described squirrel-cage bar is connected with an end ring, and described end ring as far as possible near-earth press close to described iron core.
At circumferential three antimeres of described end ring, arranging three reliably joins compared with the thick described squirrel-cage bar of the squirrel-cage bar described in other and described end ring.
Described end ring is radially fixed in the rotating shaft of motor.
Symmetrical two places of described end ring or three places are radially fixed in the rotating shaft of motor.
Described squirrel-cage bar is interior squirrel-cage bar and the outer squirrel-cage bar of double cage motor.
Described squirrel-cage bar is the trapezoidal squirrel-cage bar of deep slot motor.
Described end ring and described squirrel-cage bar adopt single welding.
The rotor end ring structure for double cage motor or deep slot motor that adopts technique scheme, unites two into one the inside and outside end ring of double cage motor rotor, inside and outside squirrel-cage bar is connected with same end ring.Be made in like this on electricity (magnetic) road and do not have any impact, but end ring is supported by two squirrel-cage bars, its Rigidity and strength that supports end ring is greatly improved, when motor rotation, the shearing force of its outer squirrel-cage bar carrying greatly reduces, and the possibility of its disconnected bar reduces greatly.After end ring unites two into one, have ready conditions and can make end ring press close to as far as possible iron core, can further reduce the load situation of squirrel-cage bar, further reduce disconnected bar phenomenon and occur.With three squirrel-cage bar deciles larger than other squirrel-cage bar are uniform, reliably join with end ring, can further reduce the disconnected possibility of other squirrel-cage bar.Its defect is therefore may produce high order harmonic component, and starting torque is had to a little adverse effect.Symmetrical two places of end ring or three places are radially reliably fixed in rotating shaft.
Squirrel-cage motor rotor (containing cast-aluminum rotor) end ring its role is to by squirrel-cage bar in rotor at the two ends for copper (aluminium) encircle the short circuit that is connected, therefore be referred to as short circuit end ring, referred to as end ring.The inside and outside squirrel-cage bar of double-cage rotor two ends were respectively with the short circuit that is connected of inside and outside two copper end ring in the past, and use now the short circuit that simultaneously inside and outside squirrel-cage bar two ends is connected of an end ring instead, from essence, there is no any difference, but in the concrete practice, can consider the suitable attenuate of the thickness of end ring, can reduce the weight of whole end ring, thereby reduce the moment of inertia of its end ring, to controlling squirrel-cage bar fracture, will be greatly improved.
The rotor end ring structure for double cage motor or deep slot motor that fracture can not occur when in sum, the present invention is a kind of use or reverse.
Accompanying drawing explanation
Fig. 1 is the rotor end ring structural representation of existing double cage motor.
Fig. 2 is the rotor end ring schematic cross-section of existing double cage motor.
Fig. 3 is the rotor end ring structural representation of double cage motor provided by the invention.
Fig. 4 is the rotor end ring structural representation of existing deep slot motor.
Fig. 5 is the rotor end ring schematic cross-section of existing deep slot motor.
Fig. 6 is the rotor end ring structural representation of deep slot motor provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Referring to Fig. 1 and Fig. 2, the interior squirrel-cage bar 6 of the double-cage rotor of double cage motor (circle or rectangle), outer squirrel-cage bar 3 two ends are respectively with the short circuit that is connected of two copper interior end ring 5, outer end ring 4, interior squirrel-cage bar 6, outer squirrel-cage bar 3 are installed on iron core 1, interior end ring 5, outer end ring 4 all with iron core 1 in a distance, 7 in Fig. 1 represents breaking part.
Referring to Fig. 3, for double cage motor rotor end ring, by unite two into one end ring 2 of the inside and outside end ring of double cage motor rotor, interior squirrel-cage bar 6 is connected with same end ring 2 with outer squirrel-cage bar 3.Be made in like this on electricity (magnetic) road and do not have any impact, but end ring 2 is supported by the interior squirrel-cage bar 6 of two squirrel-cage bars and outer squirrel-cage bar 3, the Rigidity and strength that interior squirrel-cage bar 6 and outer squirrel-cage bar 3 support end ring 2 is greatly improved, when motor rotation, the shearing force of outer squirrel-cage bar 3 carryings greatly reduces, and the possibility of its disconnected bar reduces greatly.
After end ring unites two into one, have ready conditions and can make end ring 2 press close to as far as possible iron core 1, can further reduce the load situation of squirrel-cage bar, further reduce disconnected bar phenomenon and occur.End ring 2 is pressed close to after iron core 1, in welding procedure, remakes a little changes, by welding by both sides, changes single welding into.For making welding more reliable, internal squirrel-cage bar 6 and outer squirrel-cage bar 3 are made some chamfered in advance.
Rotor end ring for the double cage motor of its synchronous speed >=1500 rev/min is done following further fixing processing.
With three outer squirrel-cage bar 3 deciles larger than other outer squirrel-cage bar 3 are uniform, reliably join with end ring 2, can further reduce the disconnected possibility of other squirrel-cage bar.Its defect is therefore may produce high order harmonic component, and starting torque is had to a little adverse effect.
In addition symmetrical two places of end ring 2 or three places are radially reliably fixed in the rotating shaft of motor.
Referring to Fig. 4 and Fig. 5, a copper interior end ring 5 short circuit that is connected for trapezoidal squirrel-cage bar 8 two ends of deep slot motor, trapezoidal squirrel-cage bar 8 is arranged on iron core 1, and trapezoidal squirrel-cage bar 8 and iron core 1 in a distance, easily produce fracture.
Referring to Fig. 6, end ring 2 is pressed close to iron core 1 as far as possible, and change welding manner is single-sided welding.For making welding more reliable, in advance trapezoidal squirrel-cage bar 8 is made to appropriate chamfered.
During in synchronous speed >=1500 rev/min, end ring 2 is done to following disposal.
At end ring 2 antimeres, arrange that three trapezoidal squirrel-cage bars 8 thick compared with other trapezoidal squirrel-cage bar 8 reliably join with end ring 2, can effectively prevent end ring 2 to be in operation and twist.
Symmetrical two places of end ring 2 or three places are radially reliably fixed in the rotating shaft of motor, are more conducive to end ring 2 and are not offset.
Claims (10)
1. the rotor end ring structure for double cage motor or deep slot motor, comprise squirrel-cage bar and iron core (1), it is characterized in that: described squirrel-cage bar is connected with an end ring (2), and described end ring (2) as far as possible near-earth press close to described iron core (1).
2. the rotor end ring structure for double cage motor or deep slot motor according to claim 1, is characterized in that: at circumferential three antimeres of described end ring (2), arrange that three reliably join compared with the thick described squirrel-cage bar of the squirrel-cage bar described in other and described end ring (2).
3. the rotor end ring structure for double cage motor or deep slot motor according to claim 1 and 2, is characterized in that: described end ring (2) is radially fixed in the rotating shaft of motor.
4. the rotor end ring structure for double cage motor or deep slot motor according to claim 3, is characterized in that: symmetrical two places of described end ring (2) or three places are radially fixed in the rotating shaft of motor.
5. the rotor end ring structure for double cage motor or deep slot motor according to claim 1 and 2, is characterized in that: the interior squirrel-cage bar (6) that described squirrel-cage bar is double cage motor and outer squirrel-cage bar (3).
6. the rotor end ring structure for double cage motor or deep slot motor according to claim 3, is characterized in that: the interior squirrel-cage bar (6) that described squirrel-cage bar is double cage motor and outer squirrel-cage bar (3).
7. the rotor end ring structure for double cage motor or deep slot motor according to claim 1 and 2, is characterized in that: the trapezoidal squirrel-cage bar (8) that described squirrel-cage bar is deep slot motor.
8. the rotor end ring structure for double cage motor or deep slot motor according to claim 3, is characterized in that: the trapezoidal squirrel-cage bar (8) that described squirrel-cage bar is deep slot motor.
9. the rotor end ring structure for double cage motor or deep slot motor according to claim 1 and 2, is characterized in that: described end ring (2) adopts single welding with described squirrel-cage bar.
10. the rotor end ring structure for double cage motor or deep slot motor according to claim 3, is characterized in that: described end ring (2) adopts single welding with described squirrel-cage bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420418672.XU CN204030902U (en) | 2014-07-28 | 2014-07-28 | A kind of rotor end ring structure for double cage motor or deep slot motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420418672.XU CN204030902U (en) | 2014-07-28 | 2014-07-28 | A kind of rotor end ring structure for double cage motor or deep slot motor |
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| CN204030902U true CN204030902U (en) | 2014-12-17 |
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| CN201420418672.XU Active CN204030902U (en) | 2014-07-28 | 2014-07-28 | A kind of rotor end ring structure for double cage motor or deep slot motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167890A (en) * | 2014-07-28 | 2014-11-26 | 大唐湘潭发电有限责任公司 | Rotor end ring structure for double-squirrel-cage motor or deep groove type motor |
| CN106787554A (en) * | 2017-02-24 | 2017-05-31 | 徐州大元电机有限公司 | A kind of high efficiency composition cage bar motor rotor and preparation method thereof |
-
2014
- 2014-07-28 CN CN201420418672.XU patent/CN204030902U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167890A (en) * | 2014-07-28 | 2014-11-26 | 大唐湘潭发电有限责任公司 | Rotor end ring structure for double-squirrel-cage motor or deep groove type motor |
| CN106787554A (en) * | 2017-02-24 | 2017-05-31 | 徐州大元电机有限公司 | A kind of high efficiency composition cage bar motor rotor and preparation method thereof |
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