CN203278575U - Water turbine rotor magnet yoke heating device - Google Patents
Water turbine rotor magnet yoke heating device Download PDFInfo
- Publication number
- CN203278575U CN203278575U CN 201320186590 CN201320186590U CN203278575U CN 203278575 U CN203278575 U CN 203278575U CN 201320186590 CN201320186590 CN 201320186590 CN 201320186590 U CN201320186590 U CN 201320186590U CN 203278575 U CN203278575 U CN 203278575U
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- heating
- yoke
- mica
- sheet
- heater
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Abstract
The utility model discloses a water turbine rotor magnet yoke heating device. The heating device comprises metal ultra-thin mica heating sheets arranged on magnet yokes. Each metal ultra-thin mica heating sheet comprises a housing and a mica sheet, the mica sheet is fixedly arranged inside the housing, and the peripheral of the mica sheet is winded with nichrome filaments. The metal ultra-thin mica heating sheet is disposed between two adjacent magnet yokes for heating, so that all the magnet yokes are quickly heated, heating time is greatly reduced, and normally the heating time only needs 10-12 hours to reach the temperature; and the surface power of the metal ultra-thin mica heating sheet is normally less than 1W, and the surface temperature of the metal ultra-thin mica heating sheet is 300 DEG C. at most, so that overheat phenomena of parts of the magnet yokes are prevented. Besides, the amount of ventilation gaps of all the magnet yokes is up to 6000, so that the amount of the metal ultra-thin mica heating sheets can be controlled according to the size of heated areas, and unnecessary energy loss is prevented.
Description
Technical field
The utility model relates to a kind of heater, particularly a kind of hydroturbine rotor yoke heater.
Background technology
Rotor mainly is comprised of rotor field spider, yoke and magnetic pole, and rotor top is connected with upper shaft, and the bottom is connected with generator shaft, and connected mode is flange and connects.The assembling, rim lamination assembling and the magnetic pole that carry out rotor field spider at erection bay mount.
The generator amature external diameter is Φ 14078mm, and the rotor yoke height is 3430mm, and integral rotor weight is 1574t.Rotor field spider has 24 support arms, is divided into being assembled into integral body after centerbody and 4 secter pats are transported to the scene, and the bottom of support is provided with braking ring; Yoke by the high-strength hot-rolled sheet metal of high-quality at the scene closed assembly form.The rim lamination bolted, minute upper and lower two-layer, after rim lamination was completed, yoke was carried out hot jacket.The yoke outside hangs up magnetic pole and line.
Hydroelectric station hydraulic generator unit is in operation, the rotor yoke of motor can be subject to very large centrifugal force, particularly large seat No. or high rotating speed unit, huge centrifugal force can make laminated yoke produce obvious radial deformation, thereby generation radial separation gap between the yoke of making and rotor field spider, root diameter is larger or rotating speed is higher, Separation is larger, this not only can make unit cause excessive swing and vibration, hook on the rotor field spider stud is ruptured because being subject to impacting, cause serious accident.Therefore, with rotor field spider one pretightning force, make the radially tight amount of laminate patch and rotor field spider reach the requirement of satisfying unit operation after the on-the-spot magnet yoke blanking sheet of rotor, closed assembly, rim keying is generally all carried out at twice, first keystroke under cold state, and then under hot state keystroke.
The method of at present main yoke hot jacket is as follows:
1, adopt the air-heater heating.With the heatproof paulin, whole yoke outer surface portion is wrapped exactly, inner surface portion is tight owing to having support arm to be connected with yoke can't to wrap up, then blow into hot blast with air-heater facing to reserved opening, at the scene whole yoke being blown to heat with air-heater heats in fluffy, this mode of heating can be imagined, be heated to 120 degree and need about 7 days as diameter being reached 12 meters, yoke high 4 meters, the 800T that weighs, because the yoke inner surface can't wrap up sternly, be easy to make support arm also be heated simultaneously and make yoke heat expansion poor effect under Action of Wind pressure in addition.Therefore unequal shortcoming that there is length heating time in this heating means, power consumption is large, the consumption manpower is large, heating effect is not obvious, integral body is heated.
2, adopting bolt electric heating rod to be inserted in yoke top to bottm heats in fixing hole.Remove exactly top to bottm fixing approximately 1/3 bolt of yoke, then insert 40 and be about 3500 high-power bolt electric heating rod and power line is caused the temperature control cabinet, then wrap heatproof in whole yoke surfaces and be carried out heating.There is following problem: A in this kind heating means, top to bottm the fixing limited scope of the required heating of single heating rod that makes of bolt quantity is larger due to yoke, what therefore the power of heating rod must be done is very large, local yoke problems of excessive heat when so just heating occurring.B, owing to being top to bottm a heating rod, heat always runs up, and so just makes that top to bottm the very large list of the temperature difference is uncontrollable, causes the whole yoke may be because heating former thereby make yoke eccentric, this is that design and use unit relatively abstains from.C, because yoke is that the sheet sheet is stacked and forms, heated rear up and down set bolt if any local deformation during heating and possibly can't insert in original hole, cause the trouble in processing bolt hole again.
The utility model content
Technical problem to be solved in the utility model be provide a kind of for the deficiencies in the prior art and conveniently control, be heated evenly, safe and reliable hydroturbine rotor magnet yoke key heater.
In order to solve the problems of the technologies described above, a kind of hydroturbine rotor yoke of the utility model heater, comprise the ultra-thin metal mica heating plate between the adjacent laminates that is arranged on yoke, described ultra-thin metal mica heating plate comprises housing, mica sheet, described mica sheet is fixedly installed in described housing, and described mica sheet periphery is wound with the heating wire such as nickel filament.
Above-mentioned hydroturbine rotor yoke heater wherein, also comprises the heater that is arranged on the yoke bottom, and described heater comprises aluminium oxide ceramics, is provided with the heating wire such as nickel filament in described aluminium oxide ceramics.
Above-mentioned hydroturbine rotor magnet yoke key heater wherein, is surrounded by the heat-preserving equipments such as needle punched blanket or asbestos on the outer surface of described yoke.
The beneficial effects of the utility model:
1, because described ultra-thin metal mica heating plate comprises housing, mica sheet, described mica sheet is fixedly installed in described housing, described mica sheet periphery is wound with the heating wire such as nickel filament, and its thickness is about 3mm, and yoke air course height is generally more than 3.5mm, therefore can satisfy instructions for use fully, and the surperficial power of this ultra-thin metal mica heating plate is generally less than 1W, and its surface temperature is up to 300 ℃, has so just avoided the superheating phenomenon of yoke part; In addition, due to nearly 6000 of the air courses of whole yoke, therefore can adjust what of ultra-thin metal mica heating plate by the size of heating surface area, avoid unnecessary energy loss.As long as heat because ultra-thin metal mica heating plate directly is inserted between adjacent yoke, therefore whole yoke is heated and has comparatively fast greatly been shortened heating time, generally arrives temperature-time 10-12 hour.
2, be provided with heater bottom yoke, described heater comprises aluminium oxide ceramics, be provided with the heating wire such as nickel filament in described aluminium oxide ceramics, heater plays the auxiliary heating effect, that anti-this adds and hankers that heat runs up and temperature of lower arranges not, therefore, uniformity and the uniformity of yoke heating have further been improved.
3, be surrounded by the heat-preserving equipment such as needle punched blanket on the surface due to described yoke, because this heat-preserving equipment is better flexible, can seal the abnormity part wrapping that the yoke inner surface contact with cradle wall tightly, effectively prevent being heated of cradle wall.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of ultra-thin metal mica heating plate of the present utility model.
Fig. 3 is the structural representation of heater in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
In order to solve the problems of the technologies described above, a kind of hydroturbine rotor magnet yoke key of the utility model heater, comprise the ultra-thin metal mica heating plate 2 that is arranged on yoke 1, described ultra-thin metal mica heating plate 2 comprises housing 21, mica sheet 22, described mica sheet 22 are fixedly installed in described housing 21, and described mica sheet 22 peripheries are wound with nickel filament 23, housing 21 is processed by metals such as stainless steel or iron, and yoke 1 is formed by stacking by multi-disc lamination 11.
In order further to improve the efficiency of heating surface of the present utility model, can be at the spatial placement heater 3 of yoke bottom, described heater 3 comprises aluminium oxide ceramics 31, is provided with nickel filament 23 in described aluminium oxide ceramics 31.Heater 3 is placed on yoke 1 bottom space place, plays the auxiliary heating effect, can prevent that this adds to hanker that heat runs up and temperature of lower is inadequate.Be surrounded by the heat-preserving equipments such as needle punched blanket or asbestos on the surface of described yoke 1.Nickel filament 23 is a kind of heating wire, its You Nie ﹑ Ge ﹑ Tie ﹑ manganese Ji the impurity alloys such as Lv ﹑ Gui ﹑ Tan ﹑ sulphur pull into.
Traditional heating means before this device is broken through, in the situation that the yoke technical specification allows, several air courses have been reserved during design between lamination, put into ultra-thin metal mica heating plate (approximately 3mm is thick) in this air course, the recycling multiloop control system carries out temperature control to it, reaches final heat heating purpose.
during control: sense temperature and convert voltage signal on yoke by K calibration thermocouple temperature measurement point, this signal is delivered to the digital display temperature-control table through compensating wire, temp controlled meter amplifies this voltage signal and compares by gate circuit with the temperature value of setting, size after utilizing is relatively controlled the output of DC12V signal, trigger the solid-state relay conducting by the DC12V signal, solid-state relay output AC220 voltage after conducting is to electric heating sheets, after the electric heating sheets heating, temperature passes on yoke, temperature on yoke passes to and forms a Control loop circuit on thermocouple.So just can carry out temperature control to yoke by the set point of regulating on the digital display temperature-control table.
Here description of the present utility model and application is illustrative; be not to want with scope restriction of the present utility model in the above-described embodiments; therefore, the utility model is not subjected to the restriction of the present embodiment, and the technical scheme that any employing equivalence replacement obtains is all in the scope of the utility model protection.
Claims (3)
1. hydroturbine rotor yoke heater, it is characterized in that, comprise the ultra-thin metal mica heating plate that is placed in yoke, described ultra-thin metal mica heating plate comprises housing, mica sheet, described mica sheet is fixedly installed in described housing, and described mica sheet periphery is wound with the heating wire such as nickel filament.
2. hydroturbine rotor yoke heater as claimed in claim 1, is characterized in that, also comprises the second heating component that is arranged on the yoke bottom, and described the second heating component comprises aluminium oxide ceramics, is provided with the heating wires such as nickel filament in described aluminium oxide ceramics.
3. hydroturbine rotor magnet yoke key heater as claimed in claim 1 or 2, is characterized in that, is surrounded by needle punched blanket or asbestos heat-preserving equipment on the surface of described yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320186590 CN203278575U (en) | 2013-04-12 | 2013-04-12 | Water turbine rotor magnet yoke heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320186590 CN203278575U (en) | 2013-04-12 | 2013-04-12 | Water turbine rotor magnet yoke heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203278575U true CN203278575U (en) | 2013-11-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320186590 Expired - Lifetime CN203278575U (en) | 2013-04-12 | 2013-04-12 | Water turbine rotor magnet yoke heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203278575U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262297A (en) * | 2015-11-09 | 2016-01-20 | 黑龙江瀚锋电热机电设备制造有限公司 | A water turbine rotor magnet yoke heating device and a method employing the device to heat a magnet yoke |
| CN107727951A (en) * | 2017-08-16 | 2018-02-23 | 中国电子科技集团公司第十八研究所 | A kind of thermo-electric generation monomer module thermoelectricity capability test table |
| CN114006508A (en) * | 2021-09-29 | 2022-02-01 | 中国水利水电第六工程局有限公司 | Method for heating rotor magnetic yoke of hydraulic generator |
-
2013
- 2013-04-12 CN CN 201320186590 patent/CN203278575U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262297A (en) * | 2015-11-09 | 2016-01-20 | 黑龙江瀚锋电热机电设备制造有限公司 | A water turbine rotor magnet yoke heating device and a method employing the device to heat a magnet yoke |
| CN105262297B (en) * | 2015-11-09 | 2019-11-15 | 黑龙江瀚锋电热机电设备制造有限公司 | The method of hydroturbine rotor magnetic yoke heating devices heat magnetic yoke |
| CN107727951A (en) * | 2017-08-16 | 2018-02-23 | 中国电子科技集团公司第十八研究所 | A kind of thermo-electric generation monomer module thermoelectricity capability test table |
| CN114006508A (en) * | 2021-09-29 | 2022-02-01 | 中国水利水电第六工程局有限公司 | Method for heating rotor magnetic yoke of hydraulic generator |
| CN114006508B (en) * | 2021-09-29 | 2023-07-25 | 中国水利水电第六工程局有限公司 | Heating method for rotor magnet yoke of hydraulic generator |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |