CN205304443U - Turbo generator stator coil nose transposition structure - Google Patents
Turbo generator stator coil nose transposition structure Download PDFInfo
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- CN205304443U CN205304443U CN201521096894.5U CN201521096894U CN205304443U CN 205304443 U CN205304443 U CN 205304443U CN 201521096894 U CN201521096894 U CN 201521096894U CN 205304443 U CN205304443 U CN 205304443U
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses a turbo generator stator coil nose transposition structure, vapour end is equallyd divide for upper and lower two sets of with the lower bar with the top bar of encouraging the end, on the top bar of vapour end group and lower bar down the group link to each other through first connecting plate, the top bar down on group and the lower bar group continuous through the second connecting plate, the group links to each other through the third connecting plate on encouraging on the top bar of end group and lower bar, the top bar down group and lower bar down the group link to each other through the fourth connecting plate. The utility model has the advantages that: through carrying out transposition in the nose junction, the electromotive force that the horizontal exchangeable magnetic field of tip and radial magnetic field produced, the circulating current loss who reduces the line stick can be offset effectively to line stick tip unshift. Connect simply, the technology strong operability reduces the circulating current loss that the end magnetic field produced effectively, has reduced the temperature rise of line stick, has compensatied the not enough of 360 transposition method of inslot.
Description
Technical field
This utility model belongs to steam turbine generator technical field, particularly relates to a kind of steam turbine generator stator coil nose transposition structure.
Background technology
At present, large turbo-type generator stator bar is in order to reduce circulation loss, ROBEL transposition is all carried out in groove, desirable transposition form is generally 540 �� of groove portion, each strand so can be made to be substantially at identical magnetic potential in groove portion axial length, and make the effect caused by each strand inner end transverse direction mutual inductance magnetic field, two ends and radial magnetic field be cancelled, reduce the loss of bar itself. But the iron core body length of most of middle-size and small-size air cooled generator is shorter, and the single number of turn of bar is more, manufacturing process is difficult to meet the requirement of 540 �� of transpositions. Therefore substantially all adopting 0 ��/360 ��/0 �� transposition, this transposition form cannot offset the effect caused by the interior horizontal mutual inductance magnetic field of each strand in end and radial magnetic field, will produce circulation loss, and increase the temperature rise of bar, and shorten the service life of electromotor.
As it is shown in figure 1, carry out 360 �� of transpositions in existing middle-size and small-size air cooling motor slot, not replacing in end, top bar 1 and lower bar 2 is directly connected to either directly through connecting plate 3, and therefore the circulation loss of end and the temperature rise of bar are all by increase.
Utility model content
This utility model provides a kind of steam turbine generator stator coil nose transposition structure, although only carries out 360 �� of transpositions in groove, but compensate for the deficiency that groove portion replaces, can weaken the circulation added losses that brow leakage field causes. Reduce the temperature rise of stator bar; And this transposition structure is simple to operate, very easily realizes. Proved is obvious.
The technical solution of the utility model is: a kind of steam turbine generator stator coil nose transposition structure, vapour end is divided into upper and lower two groups with the top bar and lower bar of encouraging end, wherein: on the top bar of vapour end, group is connected by the first connecting plate with group under lower bar, under top bar, group is connected by the second connecting plate with group on lower bar; Encouraging group on the top bar of end to be connected by the 3rd connecting plate with group on lower bar, under top bar, group is connected by the 4th connecting plate with group under lower bar.
Compared with prior art, the utility model has the advantages that: by carrying out coordinated transposition in nose junction, not replacing in bar end, it is possible to effectively cancels out end cross mutual inductance magnetic field and the electromotive force of radial magnetic field generation, thus being greatly reduced the circulation loss of bar.This transposition structure connects simple, and process operability is strong, is effectively reduced the circulation loss that end magnetic field produces, reduces bar temperature rise, reached the effect of good transposition.
Accompanying drawing explanation
This utility model will illustrate by example and with reference to the appended drawing, wherein:
Fig. 1 is the transposition structure of existing bar;
Fig. 2 is the transposition connected mode schematic diagram of vapour end of the present utility model;
Fig. 3 is the transposition connected mode schematic diagram encouraging end of the present utility model.
Detailed description of the invention
A kind of steam turbine generator stator coil nose transposition structure, including vapour end and the transposition connected mode encouraging end, wherein:
The transposition connected mode of vapour end is as shown in Figure 2: top bar 1 is divided into group 1a and lower group 1b, lower bar 2 is divided into group 2a and lower group 2b, top bar is organized 1a be connected by the first connecting plate 3 with group 2b under lower bar, organize 1b under top bar and be connected by the second connecting plate 4 with group 2a on lower bar. Insulation between upper and lower group of each layer line rod.
Encourage the transposition connected mode of end as shown in Figure 3: top bar 5 is divided into group 5a and lower group 5b, lower bar 6 is divided into group 6a and lower group 6b, top bar is organized 5a be connected by the 3rd connecting plate 7 with group 6a on lower bar, organize 5b under top bar and be connected by the 4th connecting plate 8 with group 6b under lower bar. Insulation between upper and lower group of each layer line rod.
Operation principle of the present utility model is: after bar is divided into upper and lower two groups, R1a=2R1, it is assumed that induced potential �� is completely the same, by formula i=��/R it can be seen that circulation i1a=1/2i1. Figure it is seen that when bar is by after being grouped transposition, the 1a on upper strata will shift to lower floor (2b) position, be equivalent to end bar and also spatially carry out transposition consistent in groove, and therefore its end circulation loss also will be greatly reduced.
Claims (5)
1. a steam turbine generator stator coil nose transposition structure, it is characterized in that: vapour end is divided into upper and lower two groups with the top bar and lower bar of encouraging end, wherein: on the top bar of vapour end, group is connected by the first connecting plate with group under lower bar, under top bar, group is connected by the second connecting plate with group on lower bar; Encouraging group on the top bar of end to be connected by the 3rd connecting plate with group on lower bar, under top bar, group is connected by the 4th connecting plate with group under lower bar.
2. a kind of steam turbine generator stator coil nose transposition structure according to claim 1, it is characterised in that: insulate between upper and lower group of vapour end top bar.
3. a kind of steam turbine generator stator coil nose transposition structure according to claim 1, it is characterised in that: insulate between upper and lower group of vapour end lower bar.
4. a kind of steam turbine generator stator coil nose transposition structure according to claim 1, it is characterised in that: encourage insulation between upper and lower group of end top bar.
5. a kind of steam turbine generator stator coil nose transposition structure according to claim 1, it is characterised in that: encourage insulation between upper and lower group of end lower bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096894.5U CN205304443U (en) | 2015-12-25 | 2015-12-25 | Turbo generator stator coil nose transposition structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096894.5U CN205304443U (en) | 2015-12-25 | 2015-12-25 | Turbo generator stator coil nose transposition structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304443U true CN205304443U (en) | 2016-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521096894.5U Active CN205304443U (en) | 2015-12-25 | 2015-12-25 | Turbo generator stator coil nose transposition structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304443U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968576A (en) * | 2021-04-13 | 2021-06-15 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
-
2015
- 2015-12-25 CN CN201521096894.5U patent/CN205304443U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968576A (en) * | 2021-04-13 | 2021-06-15 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
| CN112968576B (en) * | 2021-04-13 | 2022-10-25 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |