CN101123381B - Full air cooling system for huge water wheel generator - Google Patents
Full air cooling system for huge water wheel generator Download PDFInfo
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- CN101123381B CN101123381B CN2007101443115A CN200710144311A CN101123381B CN 101123381 B CN101123381 B CN 101123381B CN 2007101443115 A CN2007101443115 A CN 2007101443115A CN 200710144311 A CN200710144311 A CN 200710144311A CN 101123381 B CN101123381 B CN 101123381B
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- rotor
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- radial ventilation
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Abstract
The invention relates to a huge hydraulic generator full air-cooling system. Regarding the utility model, an air coolant passage is connected with a radial ventilation duct and an air gap of a rotor rim through a rotor frame; and air flows through the clearance between magnetic poles, and enters the air gap, and a radial ventilation duct of a stator, and then gathers in a cooler, and flows throughan upper channel and a lower channel, and then returns to the rotor frame; a closed self-circulation ventilation system is formed in this way. By adopting the invention, air supply area of the rotorrim is significantly increased so that utilization ratio of each ventilation duct and gap is further improved; local wind resistance at the rotor rim is reduced; ventilation quantity is increased; andthe motor cooling requirement is met.
Description
Technical field: the present invention relates to a kind of full air cooling system for huge water wheel generator.
Background technology: the above large-sized water turbine generator (being called as huge unit) of 600MW generally believes that full air cooling can not satisfy the cooling requirement of unit in the world at present, there are a lot of technical barriers, and adopt half Water Cooling Technology, i.e. stator internal water cooling, rotor and stator core air cooling.This kind type of cooling is made complicated owing to need hollow copper wire in the stator bar.Line rod two ends have increased water swivel, because 700MW unit line rod is very many, water swivel is easy to generate leakage phenomenon generally more than 10,000 under the pressure of high pressure inner cold water, and shutdown causes the accident.Owing to increased by a cover pure water system, the accident that water treatment, water are supplied with also often has generation simultaneously.Because the existence of water system when motor plays shutdown, operation, needs the place of monitoring also more.Generally speaking with respect to full air cooling ratio, half water-cooled unit rate of failure height, operational management complexity, secondary operating cost height.
Summary of the invention: it is low to the purpose of this invention is to provide a kind of rate of failure, and operational management is simple, the full air cooling system for huge water wheel generator that the secondary operating cost is lower.The objective of the invention is to be achieved through the following technical solutions: the present invention is: cooling air channels switches through slit between sub-yoke rotor yoke radial ventilation ditch and yoke sheet by rotor field spider, the space between the magnetic pole of flowing through again, enter aweather ditch of air gap, stator footpath, be pooled to cooler then, again divide flow through end upper air duct, lower air duct of upper and lower two-way to get back to rotor field spider, constitute airtight self-loopa ventilating system.Adopt full air cooling for huge water wheel generator, one of cooling requirement design at generator is the optimal ventilation system of coolant with the air exactly, simultaneously adopt the hybrid air feed structure in slit between the radial ventilation ditch of rotor yoke and yoke sheet for the rotor yoke of resistance element again for being pressure elements, the quantity in slit is the number of magnetic poles that the magnetic pole sum comprises divided by individual yoke sheet between the yoke sheet, leave the gap between rotor magnetic pole coil and rotor yoke, wherein the radial ventilation ditch of rotor yoke is formed by the wind-guiding band, inlet is at the rotor field spider place, outlet all has air outlet between each magnetic pole in the radial ventilation ditch of same rotor yoke between two magnetic poles.
Under the prerequisite that adopts slit air feed structure between the yoke sheet, by strengthening the measure of rotor rigidity, adopt the radial ventilation ditch air feed structure of rotor yoke simultaneously, make the cooling air quantity of hydraulic generator enough and reach adjustable degree, satisfy the cooling requirement of generator better.For the effective width in slit between the radial ventilation ditch that increases rotor yoke and yoke sheet, make between rotor magnetic pole coil and rotor yoke and leave the gap on this basis.The present invention adopts mixed rotor yoke aeration structure, and the air feed area of rotor yoke is greatly increased.Leave the gap owing to making between rotor magnetic pole coil and rotor yoke simultaneously, the utilance in slit between the radial ventilation ditch of each rotor yoke and yoke sheet is further improved, the effective width in slit between the radial ventilation ditch of rotor yoke and yoke sheet is further improved.Thereby reduced the local windage at rotor yoke place, increased ventilation quantity, satisfied the cooling requirement of motor.
Simultaneously adopt the hybrid air feed structure in slit between the radial ventilation ditch of rotor yoke and yoke sheet for the rotor yoke of resistance element again for being pressure elements, leave the gap between rotor magnetic pole coil and rotor yoke, wherein the radial ventilation ditch of rotor yoke is formed by the wind-guiding band, inlet is at the rotor field spider place, outlet all has air outlet between each magnetic pole in the radial ventilation ditch of same rotor yoke between two magnetic poles.Slit air feed design feature is that several magnetic poles of being separated by on one deck just have a slit between the yoke sheet, but the rigidity of rotor is stronger.The characteristics of this ventilating system are that air quantity can be adjusted as required, and air quantity distributes rationally, and draft loss is less.The effect of invention: this invention is proved the cooling needs that can satisfy huge water wheel generator by Three Gorges right bank hydraulic generator ventilation model.Full air cooling ventilating system according to this invention design has been applied in the huge water wheel generator design of Long Tan, Three Gorges right bank 700MW level simultaneously.And the operation result of this two unit shows that the generator unit stator temperature rise distributes vertically and all compares evenly.The specified temperature rise 53K of dragon beach unit has reached the requirement less than 70K of designing requirement.The Three Gorges specified temperature rise of right bank 700MW unit is 55K, less than the requirement of 72K.Three Gorges right bank unit ventilates and calculates air quantity 323.4
3/ s, measured value are 320.8m
3/ s, upper air duct air quantity are 60%, and the lower air duct air quantity is 40%, and is identical with calculated value.This type of cooling has advantages such as simple in structure, reliable, easy to maintenance, can effectively reduce the secondary operating cost of power plant.
Description of drawings:
Fig. 1 is an overall structure cutaway view of the present invention
Fig. 2 is the radial ventilation ditch partial sectional view of rotor yoke
Fig. 3 is a slit partial sectional view between the yoke sheet
Embodiment:
The present invention as shown in Figure 1 is a kind of full air cooling system for huge water wheel generator, cooling air channels switches through slit 14 between sub-yoke 5 rotor yoke radial ventilation ditches 10 and yoke sheet by rotor field spider 8, the space between the magnetic pole 4 of flowing through again, these rotating channels also play fan simultaneously, enter aweather ditch 2 of air gap 3, stator footpath, be pooled to cooler 1 then.Again divide flow through end upper air duct 6, lower air duct 7 of upper and lower two-way to get back to rotor field spider 8, constitute airtight self-loopa ventilating system.
As shown in Figure 2, simultaneously adopt the hybrid air feed structure in slit between the radial ventilation ditch of rotor yokes and yoke sheet for the rotor yoke 5 of resistance element again for being pressure elements.5 of rotor magnetic pole coil 9 and rotor yokes leave gap, the 15mm left and right sides, wherein rotor yoke radial ventilation ditch 10 is formed by wind-guiding band 11, inlet is at rotor field spider 8 places, and outlet all has air outlet between each magnetic pole in the radial ventilation ditch 10 of same rotor yoke between two magnetic poles 4.As shown in Figure 3, the quantity in slit 14 is the number of magnetic poles that magnetic pole 4 sums comprise divided by individual yoke sheet 13 between the yoke sheet.
Claims (1)
1. full air cooling system for huge water wheel generator, cooling air channels switches through slit (14) between sub-yoke (5) rotor yoke radial ventilation ditch (10) and yoke sheet by rotor field spider (8), the space between the magnetic pole (4) of flowing through again, enter air gap (3), the stator footpath is ditch (2) aweather, be pooled to cooler (1) then, on dividing again, the following two-way end upper air duct (6) of flowing through, lower air duct (7) is got back to rotor field spider (8), constitute airtight self-loopa ventilating system, it is characterized in that: adopt the hybrid air feed structure in slit between rotor yoke radial ventilation ditch and yoke sheet for the rotor yoke of resistance element (5) again simultaneously for being pressure elements, the quantity in slit between the yoke sheet (14) is the number of magnetic poles that the magnetic pole sum comprises divided by individual yoke sheet (13), leave the gap between rotor magnetic pole coil (9) and rotor yoke (5), wherein rotor yoke radial ventilation ditch (10) is formed by wind-guiding band (11), inlet is located at rotor field spider (8), outlet all has air outlet between each magnetic pole in same rotor yoke radial ventilation ditch (10) between two magnetic poles (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101443115A CN101123381B (en) | 2007-09-14 | 2007-09-14 | Full air cooling system for huge water wheel generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101443115A CN101123381B (en) | 2007-09-14 | 2007-09-14 | Full air cooling system for huge water wheel generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101123381A CN101123381A (en) | 2008-02-13 |
| CN101123381B true CN101123381B (en) | 2010-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101443115A Active CN101123381B (en) | 2007-09-14 | 2007-09-14 | Full air cooling system for huge water wheel generator |
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| Country | Link |
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| CN (1) | CN101123381B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8179002B2 (en) * | 2011-03-31 | 2012-05-15 | General Electric Company | Axial cooled generator |
| CN102507643B (en) * | 2011-11-21 | 2013-04-24 | 哈尔滨电机厂有限责任公司 | Ventilating and temperature increasing test device for giant fully-air cooling hydraulic generator stator |
| CN108318817A (en) * | 2018-04-11 | 2018-07-24 | 哈尔滨电机厂有限责任公司 | A kind of hydraulic generator rotor ventilation and the simulation test device that generates heat |
| CN117767657A (en) * | 2024-02-22 | 2024-03-26 | 南方电网调峰调频发电有限公司 | generator motor and ventilation cooling system thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155405A1 (en) * | 1984-03-21 | 1985-09-25 | Siemens Aktiengesellschaft | Device for indirect gas cooling of stator windings and/or for the direct gas cooling of stator laminated magnetic cores of a dynamo-electric machine, particularly for gas-cooled turbogenerators |
| CN1209674A (en) * | 1997-08-23 | 1999-03-03 | Abb研究有限公司 | Turbine generator |
| CN1362775A (en) * | 2000-11-27 | 2002-08-07 | 阿尔斯托姆电力有限公司 | Gas-cooling machine, in particular turbine generator |
-
2007
- 2007-09-14 CN CN2007101443115A patent/CN101123381B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155405A1 (en) * | 1984-03-21 | 1985-09-25 | Siemens Aktiengesellschaft | Device for indirect gas cooling of stator windings and/or for the direct gas cooling of stator laminated magnetic cores of a dynamo-electric machine, particularly for gas-cooled turbogenerators |
| CN1209674A (en) * | 1997-08-23 | 1999-03-03 | Abb研究有限公司 | Turbine generator |
| CN1362775A (en) * | 2000-11-27 | 2002-08-07 | 阿尔斯托姆电力有限公司 | Gas-cooling machine, in particular turbine generator |
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| Publication number | Publication date |
|---|---|
| CN101123381A (en) | 2008-02-13 |
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