CN201388115Y - Air volume adjusting mechanism of rotor terminal of air-cooled steam turbine generator - Google Patents
Air volume adjusting mechanism of rotor terminal of air-cooled steam turbine generator Download PDFInfo
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- CN201388115Y CN201388115Y CN200920099089U CN200920099089U CN201388115Y CN 201388115 Y CN201388115 Y CN 201388115Y CN 200920099089 U CN200920099089 U CN 200920099089U CN 200920099089 U CN200920099089 U CN 200920099089U CN 201388115 Y CN201388115 Y CN 201388115Y
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- steam turbine
- turbine generator
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Abstract
The utility model relates to an air volume adjusting mechanism of a rotor terminal of an air-cooled steam turbine generator. The main technical problems of the air-cooled steam turbine generator are as follows: research and development and design of ventilation and cooling, reasonable distribution of air volume and cooling enhancement of a high-temperature position winding. The air volume adjusting mechanism comprises a rotor; the rotor section with axial and symmetrical ventilation is periodically provided with 32 grooves, namely, 32 coils, wherein the arc sections at the end parts are longest, the easiest overtemperature coils are coils (1) number 8, number 9, number 24 and number 25 which are adopted; each circle of ventilating duct (2) of the coil is additionally provided with an arc-section air inlet hole (3); the coils (1) are axially provided with axial baffle blocks (4); the ventilating duct (2) is provided with an axial air inlet (5); the coils (1) are longitudinally provided with fan-shaped insulating baffle blocks (6); and the end part of the ventilating duct (2) is provided with a straight section air inlet (7). The air volume adjusting mechanism is used for researching and manufacturing the steam turbine generator.
Description
Technical field:
The utility model relates to a kind of air-cooled steam turbine generator rotor tip air quantity adjustment structure.
Background technology:
1. air-cooled steam turbine generator end cooling technology
At present, world's energy output about 80% is provided by turbo generator.Because the turbo generator cooling system is the simplest with the equipment of air cooling system, be easy to safeguard, advantage such as fail safe is good, rapid to the increase in demand of air cooling motor, the single-machine capacity of unit is increasing.The development of turbo generator occupies critical role in development of electric power industry.
The turbo generator single-machine capacity constantly increases, and is main by increasing the electromagnetic load realization.But increase specific electric load and just increased line bar copper consumption simultaneously; The local temperature rise of unit is higher relatively, and thermal stress and thermal deformation are bigger; Compare with other coolants, thermal conductivity, the thermal capacity of air are lower, and density is bigger, and the windmill loss is big; Compare with hydraulic generator, its volumetric spaces is narrow and small, and the numerical value of unit volume thermal source is big, and the temperature rise of winding is bigger; When temperature is elevated to the safety that to a certain degree at first will injure insulating material, and then jeopardize the safety of hardware, generator can't safe operation.
The technical problem underlying that air-cooled steam turbine generator exists is the research and development design of ventilating and cooling off, and takes measures, and the reasonable distribution air quantity is strengthened the cooling of high temperature place winding; Because of the motor component heating causes rotor interturn short-circuit and structure gross distortion, the accident that jeopardizes the motor safety operation happens occasionally both at home and abroad.
Summary of the invention:
The purpose of this utility model provides a kind of air-cooled steam turbine generator rotor tip air quantity adjustment structure.
Above-mentioned purpose realizes by following technical scheme:
Air-cooled steam turbine generator rotor tip air quantity adjustment structure, its composition comprises: rotor, 32 grooves are periodically offered in the rotor cross section that described axial symmetry is ventilated, promptly have 32 coils, its medial end portions segmental arc is the longest, the coil of easy overtemperature is 8,9,24 and No. 25 coils 1, adopt 8,9,24 and No. 25 coils, the air duct of each circle of described coil is set up the segmental arc fresh air inlet, described coil is axially arranged with axial stop, described air duct is provided with the air inlet through hollow shaft mouth, described coil vertically is provided with fan-shaped insulating spacer, and described air duct end is provided with the straight section fresh air inlet.
This technical scheme has following beneficial effect:
The ventilating system that air-cooled steam turbine generator is commonly used has a variety of, and when rotor tip has the independent ventilation system, portion of air is discharged by the ventilation slot on the rotor body canine tooth of coil utmost point centerline through rotor tip fresh air inlet cooling end winding; And premenstruum (premenstrua), numerical computations and test found that temperature is higher near the end coil utmost point center line.For avoiding overtemperature, design the segmental arc fresh air inlet in advance, the air quantity that can carry out before model machine dispatches from the factory is regulated and the temperature of rotor test, and rotor radial is had a narrow range of temperature, and further reduces peak temperature, guarantees motor safety stable operation.
During this product uses, on the low side when rotor ventilation cooling result calculated, during the rotor tip temperature overtemperature of surveying out, need not dismantle the parts in the rotor, only need to shut down, open the part or all of ventilation hole of segmental arc, can increase the wind supply quantity at segmental arc overtemperature place.
Description of drawings:
Accompanying drawing 1 is that air-cooled steam turbine generator rotor coil end segmental arc fresh air inlet is offered position plane figure.
Embodiment:
Embodiment 1:
Air-cooled steam turbine generator rotor tip air quantity adjustment structure, its composition comprises: rotor, 32 grooves are periodically offered in the rotor cross section that described axial symmetry is ventilated, promptly have 32 coils, its medial end portions segmental arc coil the longest, the easiest overtemperature is 8,9,24 and No. 25 coils, adopt the air duct of 8,9,24 and No. 25 every circles of coil to set up the segmental arc fresh air inlet, described coil is axially arranged with axial stop, air inlet through hollow shaft mouth, described coil vertically is provided with fan-shaped insulating spacer, and described end winding is provided with the straight section fresh air inlet.
Embodiment 2:
Air-cooled steam turbine generator rotor tip air quantity adjustment structure, its composition comprises: rotor, 32 grooves are periodically offered in the rotor cross section that described axial symmetry is ventilated, promptly have 32 coils, its medial end portions segmental arc is the longest, the coil of easy overtemperature is 8,9,24 and No. 25 coils 1, adopt 8,9,24 and No. 25 coils 1, the air duct 2 of every circle is set up segmental arc fresh air inlet 3, described coil 1 is axially arranged with axial stop 4, described air duct 2 is provided with air inlet through hollow shaft mouth 5, described coil 1 vertically is provided with fan-shaped insulating spacer 6, and described air duct 2 ends are provided with straight section fresh air inlet 7.
Rotor tip has an independent ventilation wind path, and portion of air is set up fresh air inlet through rotor tip straight section fresh air inlet cooling end winding at the every circle of segmental arc, increases the air capacity that enters every circle, is discharged by the ventilation slot on the rotor body canine tooth of coil utmost point centerline.
Claims (1)
1. air-cooled steam turbine generator rotor tip air quantity adjustment structure, its composition comprises: rotor, it is characterized in that: 32 grooves are periodically offered in the rotor cross section that described axial symmetry is ventilated, promptly have 32 coils, its medial end portions segmental arc is the longest, the coil of easy overtemperature is 8,9,24 and No. 25 coils 1,8,9, the air duct of each circle of 24 and No. 25 coils is set up the segmental arc fresh air inlet, described coil is axially arranged with axial stop, described air duct is provided with the air inlet through hollow shaft mouth, described coil vertically is provided with fan-shaped insulating spacer, and described air duct end is provided with the straight section fresh air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920099089U CN201388115Y (en) | 2009-02-11 | 2009-02-11 | Air volume adjusting mechanism of rotor terminal of air-cooled steam turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920099089U CN201388115Y (en) | 2009-02-11 | 2009-02-11 | Air volume adjusting mechanism of rotor terminal of air-cooled steam turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201388115Y true CN201388115Y (en) | 2010-01-20 |
Family
ID=41580659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920099089U Expired - Fee Related CN201388115Y (en) | 2009-02-11 | 2009-02-11 | Air volume adjusting mechanism of rotor terminal of air-cooled steam turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201388115Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917074A (en) * | 2010-07-27 | 2010-12-15 | 哈尔滨理工大学 | Large air-cooling steam turbo generator stator capable of improving aeration-cooling effect |
| CN102931746A (en) * | 2012-11-14 | 2013-02-13 | 哈尔滨电机厂有限责任公司 | Stator bar of gas cooling generator |
| CN107896023A (en) * | 2018-01-10 | 2018-04-10 | 东方电气集团东方电机有限公司 | Cold aeration structure outside rotor of steam turbo generator end coil two-way |
-
2009
- 2009-02-11 CN CN200920099089U patent/CN201388115Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917074A (en) * | 2010-07-27 | 2010-12-15 | 哈尔滨理工大学 | Large air-cooling steam turbo generator stator capable of improving aeration-cooling effect |
| CN102931746A (en) * | 2012-11-14 | 2013-02-13 | 哈尔滨电机厂有限责任公司 | Stator bar of gas cooling generator |
| CN107896023A (en) * | 2018-01-10 | 2018-04-10 | 东方电气集团东方电机有限公司 | Cold aeration structure outside rotor of steam turbo generator end coil two-way |
| CN107896023B (en) * | 2018-01-10 | 2023-09-05 | 东方电气集团东方电机有限公司 | Two-way external cooling ventilation structure for rotor end coil of steam turbine generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20120211 |