CN202435167U - Damping winding structure of steam turbine generator - Google Patents
Damping winding structure of steam turbine generator Download PDFInfo
- Publication number
- CN202435167U CN202435167U CN2012200254057U CN201220025405U CN202435167U CN 202435167 U CN202435167 U CN 202435167U CN 2012200254057 U CN2012200254057 U CN 2012200254057U CN 201220025405 U CN201220025405 U CN 201220025405U CN 202435167 U CN202435167 U CN 202435167U
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- damping
- rotor
- winding
- damping winding
- winding structure
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- Iron Core Of Rotating Electric Machines (AREA)
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Abstract
The utility model discloses a damping winding structure of a steam turbine generator. Damping bars are embedded into cage bar notches arranged at the top ends of rotor sheets and are connected through damping end rings at the two ends of the rotor sheets to form one short-circuit ring to form a first damping winding. Slot wedges are wedged in gaps of the tops of the rotor sheets. Full-length damping copper bars are pressed below the slot wedges to integrally connect the slot wedges. The end parts of the damping copper bars are combined with a protection ring through the slot wedges to form another short-circuit ring to form a second damping winding. Since two independent damping windings exist, through the dual-damping-winding structure, the asymmetric load bearing capacity of the generator can be better improved, the vibration of a rotor is inhibited and the operation stability is enhanced.
Description
Technical field
The utility model relates to a kind of damping winding structure of rotor of steam turbo generator.
Background technology
Generator is uneven or when unsymmetrical short-circuit takes place at three-phase load, just can the outlet negative-sequence current in the stator current, thereby produce the negative phase-sequence rotating magnetic field; And on rotor, generate the double frequency eddy current; The supplementary load loss of rotor surface are increased, and temperature raises, and produces alternating torque simultaneously; Vibration is increased, and the waveform of stator voltage also is affected.Especially for for small-sized turbo generator, all be to be independent of operation of power networks mostly, the possibility of unbalanced operation is very big, receives the influence of negative-sequence current very big.
Bear the asymmetric load ability in order to improve turbo generator; Weaken the adverse effect of negative-sequence current effectively to rotor heating; Can increase damping winding; The rotor effect that increases after the damping winding is very obvious, can reduce the eddy current resistance in circuit, and improves damping action and ability that generator bears asymmetric load.Simultaneously, damping winding can also prevent that superpotential phenomenon from appearring in the stator voltage waveform when degenerating with the excitation winding open circuit.In addition, damping winding also can produce damping torque, to reducing rotor oscillation certain benefit is arranged also.
In traditional salient pole synchronous generator; The magnetic pole of damping winding mainly contains two kinds of structural shapes: a kind of is on the pole shoe of punching sheet magnetic pole, to dash the stacked magnetic pole that damping cage bar notch is arranged; And through the damping end ring damping cage bar is connected, be called the absolute damping winding construction; Another kind is to adopt the solid magnetic pole of undamped cage bar or only at the solid magnetic pole both ends damping end ring is set, and is called as half damping winding.And the hidden pole type synchronous generator adopts rotor forging mostly, all is pressed with the amortisseur bar of a total length under the slot wedge of each groove of rotor, all amortisseur bars in the end with copper sheet hold the back be linked together, constitute the short-circuited conducting sleeve of likeness in form mouse cage.Above-mentioned no matter any structure all is single damping winding structure, and it is not ideal enough that its effect is still disliked.
The utility model content
The purpose of the utility model is to provide a kind of negative-sequence current that produces can more effectively prevent unbalanced operation the time, electric power system is played the turbo generator winding structure of more effective protective effect.
The damping winding structure of the described turbo generator of the utility model; Its rotor of steam turbo generator is formed by the rotor punching closed assembly; The top of rotor punching offers cage bar notch; Amortisseur bar embeds in the cage bar notch, and the damping end ring connection through the punching two ends forms a short-circuited conducting sleeve and constitutes first damping winding; The damping copper bar that gap location wedging at the top of each rotor punching has slot wedge, slot wedge to be pushed down into total length fuses each slot wedge, combines to form second damping winding of another short-circuited conducting sleeve formation in the end of each damping copper bar through slot wedge and retaining ring.
The damping winding structure of the described turbo generator of the utility model; Exist two short-circuited conducting sleeves to constitute two independently damping winding respectively; Can improve damping action better through two damping winding structures, the impedance of more effective reduction actual motion can better reduce the heat that the eddy current because of rotor surface induction causes; Avoid temperature of rotor too high, thus the ability that raising generator further bears asymmetric load.Simultaneously, two damping winding can better prevent that also superpotential phenomenon from appearring in the waveform of stator voltage when degenerating with the excitation winding open circuit.In addition, two damping winding all can produce damping torque, can better suppress the vibration of rotor.Can strengthen simultaneously the stability of operation.
Description of drawings
Fig. 1 is a kind of schematic perspective view of turbo generator damping winding;
Fig. 2 is the scheme of installation of first damping winding;
Fig. 3 is the sketch map of Fig. 2 end;
Fig. 4 is the schematic perspective view of damping winding one;
Fig. 5 is the schematic perspective view of damping winding two;
Embodiment
Like Fig. 1; A kind of damping winding structure of turbo generator, its rotor of steam turbo generator 1 is formed by rotor punching 2 closed assemblies, and the top of rotor punching 2 offers cage bar notch 3; Amortisseur bar 4 embeds in the cage bar notch; Damping end ring 5 through the punching two ends connects, and forms a short-circuited conducting sleeve and constitutes first damping winding 6, like Fig. 2, Fig. 3, Fig. 4; Gap location wedging at the top of each rotor punching 2 has slot wedge 7; The damping copper bar 8 that slot wedge 7 is pushed down into total length fuses each slot wedge; End at each damping copper bar constitutes second damping winding 10 through slot wedge with another short-circuited conducting sleeve of formation that combines of retaining ring 9, like Fig. 5.
Claims (1)
1. the damping winding structure of a turbo generator; Its rotor of steam turbo generator is formed by the rotor punching closed assembly; It is characterized in that: the top of rotor punching offers cage bar notch; Amortisseur bar embeds in the cage bar notch, and the damping end ring connection through the punching two ends forms a short-circuited conducting sleeve and constitutes first damping winding; The damping copper bar that gap location wedging at the top of each rotor punching has slot wedge, slot wedge to be pushed down into total length fuses each slot wedge, combines to form second damping winding of another short-circuited conducting sleeve formation in the end of each damping copper bar through slot wedge and retaining ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200254057U CN202435167U (en) | 2012-01-18 | 2012-01-18 | Damping winding structure of steam turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200254057U CN202435167U (en) | 2012-01-18 | 2012-01-18 | Damping winding structure of steam turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435167U true CN202435167U (en) | 2012-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200254057U Expired - Lifetime CN202435167U (en) | 2012-01-18 | 2012-01-18 | Damping winding structure of steam turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202435167U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297507A (en) * | 2016-08-18 | 2017-01-04 | 华北电力大学 | A kind of simulate rotor of steam turbo generator conduction slot wedge structure and the prototype of damping action thereof |
| CN106451838A (en) * | 2016-11-30 | 2017-02-22 | 华中科技大学 | Synchronous simulation motor for small-sized electrical excitation nonsalient pole |
| CN110197043A (en) * | 2019-06-11 | 2019-09-03 | 华北电力大学（保定） | Damping Modeling and method of calibration during a kind of steam turbine generator finite element simulation |
| CN111835113A (en) * | 2020-07-07 | 2020-10-27 | 山东齐鲁电机制造有限公司 | Heavy gas turbine generator rotor coil structure suitable for variable frequency starting |
-
2012
- 2012-01-18 CN CN2012200254057U patent/CN202435167U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297507A (en) * | 2016-08-18 | 2017-01-04 | 华北电力大学 | A kind of simulate rotor of steam turbo generator conduction slot wedge structure and the prototype of damping action thereof |
| CN106297507B (en) * | 2016-08-18 | 2019-05-03 | 华北电力大学 | A kind of prototype for simulating rotor of steam turbo generator conduction slot wedge structure and its damping action |
| CN106451838A (en) * | 2016-11-30 | 2017-02-22 | 华中科技大学 | Synchronous simulation motor for small-sized electrical excitation nonsalient pole |
| CN106451838B (en) * | 2016-11-30 | 2019-06-18 | 华中科技大学 | A kind of synchronously simulating motor of small electrical excitation non-salient pole |
| CN110197043A (en) * | 2019-06-11 | 2019-09-03 | 华北电力大学（保定） | Damping Modeling and method of calibration during a kind of steam turbine generator finite element simulation |
| CN110197043B (en) * | 2019-06-11 | 2023-07-04 | 华北电力大学（保定） | Damping modeling and checking method in finite element simulation process of turbonator |
| CN111835113A (en) * | 2020-07-07 | 2020-10-27 | 山东齐鲁电机制造有限公司 | Heavy gas turbine generator rotor coil structure suitable for variable frequency starting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |
|
| CX01 | Expiry of patent term |