CN103595189A - Annular water internal cooling structure laid in stator ventilation ditch - Google Patents
Annular water internal cooling structure laid in stator ventilation ditch Download PDFInfo
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- CN103595189A CN103595189A CN201310544376.4A CN201310544376A CN103595189A CN 103595189 A CN103595189 A CN 103595189A CN 201310544376 A CN201310544376 A CN 201310544376A CN 103595189 A CN103595189 A CN 103595189A
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Abstract
The invention relates to an annular water internal cooling structure laid in a stator ventilation ditch. The annular water internal cooling structure is laid in the hot air area stator radial ventilation ditch and cools cooling media in the ventilation ditch. An inner hollow cavity of the annular water internal cooling structure is full of cooling water. The cooling water plays a role in cooling cooling media entering the stator ventilation ditch through clearance and a stator so as to achieve the purpose of improving the cooling effect of a stator winding and a stator iron core and reduce the requirements for a motor cooler. A cooling water inlet pipe and a cooling water outlet pipe are arranged in the inner hollow cavity. At working time, the cooling water outlet pipe is closed first, and the water outlet pipe is opened when the whole annular water inner cooling structure is full of cooling water. A cooling water circulation device, the water inlet pipe and the water outlet pipe form a cooling water circulation passage. The cooling water circulation device is used for cooling and circulating. The annular water internal cooling structure laid in the stator ventilation ditch is especially suitable for being applied to cooling full air cooling steam turbine generators with power more than million kilowatts.
Description
Technical field
The invention belongs to technical field of motors, particularly a kind of ring-type internal water cooling structure that is laid in large synchronous generator or induction machine stator ventilation ducts.
Background technology
All there is stator radial ducts its inside of large synchronous generator more than MW class or induction machine, by the coolant in radial ducts, the heat of rotor-side heat and stator winding and release unshakable in one's determination is delivered in air or on cooler, cooler carries out cooling to it, again coolant is sent back to motor internal carry out motor cooling procedure by fan.But, in large synchronous generator or induction machine, on the one hand higher owing to rotor being carried out to cooling coolant temperature, the heat that stator loss produces simultaneously raises the coolant temperature flowing out from stator radial ventilation ditch again, and cooler cooling capacity is had relatively high expectations; On the other hand, higher coolant temperature can produce certain impact to stator winding heat dissipation effect.Therefore, an urgent demand is carried out coolingly to entering coolant in stator ventilation ducts, improves stator winding and cooling effect unshakable in one's determination.
Summary of the invention
The object of the invention is in order to solve existing large synchronous generator or induction machine stator winding and the too high problem of temperature rise unshakable in one's determination, a kind of ring-type internal water cooling structure that is laid in stator ventilation ducts is provided, by internal cavity internal water cooling, reduce the temperature that enters coolant in stator ventilation ducts, to strengthen the cooling effect of large synchronous generator or induction machine stator.
The technical solution used in the present invention is such:
The present invention is a kind of ring-type internal water cooling structure that is laid in stator ventilation ducts being applied on large synchronous generator or induction machine, comprises ring-type internal water cooling structure, oral siphon, outlet pipe and cooling water circulating device; Stator core is divided into cold wind district and hot blast district vertically, and cold wind district and hot blast district be alternative arrangement vertically; The coolant flowing out from cooler enters stator radial ventilation ditch through stator yoke back, directly to stator coil and stator core, carry out cooling; The coolant being collected by air gap and rotor enters into the radial ventilation ditch in hot blast district, cooling stator coil and stator core; Described ring-type internal water cooling structure is laid in hot blast district stator radial ventilation ditch, to coolant in ventilation ducts, carries out cooling.
Beneficial effect of the present invention is:
This structure has solved coolant temperature in large synchronous generator or asynchronous motor stator ventilation ducts and, compared with coil of stator of motor high and that cause and the bad problem of cooling effect unshakable in one's determination, has improved cooling effect.The large-scale synchronous turbo generator of take is example, the temperature that enters into stator hot blast district radial ventilation ditch after coolant cooled rotor can reach 55 ℃ even higher, its cooling effect declines thereupon, the temperature of coolant in the ring-type internal water cooling structure described in stator hot blast district radial ventilation ditch lays can effectively reduce ventilation ducts, and then improve stator coil and cooling effect unshakable in one's determination, can reduce former aerial cooler grade, thereby reduce cost simultaneously.
Accompanying drawing explanation
Fig. 1 is that ring-type internal water cooling structural entity is arranged schematic diagram.
Fig. 2 is ring-type internal water cooling structure the first half partial schematic diagram.
Fig. 3 is ring-type internal water cooling structure the latter half partial schematic diagram.
Fig. 4 is ring-type internal water cooling structure front view.
Fig. 5 is the one-sided schematic diagram that lays of ring-type internal water cooling structure.
Fig. 6 is that ring-type internal water cooling structure has protruding turbulence structure schematic diagram.
Mark in figure:
1-stator core; 2-cold wind district; 3-hot blast district; 4-cooling water circulating device; 5-ring-type internal water cooling structure; Hollow cavity in 5-1-; 6-oral siphon; 7-rotor; 8-air gap; 9-outlet pipe; 10-projection turbulence structure; 11-stator coil.
In figure, the direction of arrow is the mobile direction of coolant.
Embodiment
The invention provides a kind of ring-type internal water cooling structure that is laid in large synchronous generator or induction machine stator ventilation ducts, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Fig. 1-Fig. 6, the present invention is a kind of ring-type internal water cooling structure that is laid in stator ventilation ducts, comprises ring-type internal water cooling structure 5, oral siphon 6, outlet pipe 9 and cooling water circulating device 4.Stator core 1 is divided into the cold wind district 2 and hot blast district 3 of a plurality of alternative arrangements vertically.The 2 coolants direction that flows in cold wind district is: the coolant flowing out from cooler enters stator radial ventilation ditch through stator yoke back, directly stator coil 11 and stator core 1 is carried out coolingly, and its flow direction arrow in figure represents.The 3 coolants direction that flows in hot blast district is: enter the secondary groove of rotor and be positioned at stator core 1 and the coolant of the air gap 8 of 7 of rotors to rotor coil carry out cooling after, then enter the cooling stator coil 11 of stator radial ventilation ditch and stator core 1.This part coolant temperature when entering hot blast district stator radial ventilation ditch of radial ventilation ditch that the coolant that air gap 8 and rotor 7 collect enters into hot blast district 3 is higher, can affect the cooling effect to the stator coil 11 in hot blast district 3 and stator core 1.In Shi hot blast of the present invention district 3 stator radial ventilation ditches, lay ring-type internal water cooling structure 5, to coolant in ventilation ducts, carry out cooling.Described ring-type internal water cooling structure 5 is interior hollow-core construction, and it has interior hollow cavity 5-1.In stator core 1 outside, be provided with cooling water circulating device 4, between cooling water circulating device 4 and interior hollow cavity 5-1, by oral siphon 6, be communicated with; At interior hollow cavity 5-1, with respect to the opposite side of oral siphon 6, set out water pipe 9, outlet pipe 9 is connected to cooling water circulating device 4.Cooling water circulating device 4, oral siphon 6, interior hollow cavity 5-1, outlet pipe 9 are connected, and have formed cooling water circulation passage.Cooling water circulating device carries out cooling and circulation.
Described coolant comprises air, and hydrogen etc. can be used for the gas as coolant.
Before motor operation, first open oral siphon 6, close outlet pipe 9, until whole interior hollow cavity 5-1, be full of after cooling water, then open outlet pipe 9.The outer wall of described ring-type internal water cooling structure 5 is overrided to form by non-magnetic 0.2-0.5mm flake aluminum, can effectively reduce the loss that eddy current causes of inducting in described ring-type internal water cooling structure 5 of stray field in stator ventilation ducts.Described ring-type internal water cooling structure 5 tooth tops partly cut into trapezoidal shape, the fluid impedance losses in the time of can reducing coolant and enter stator ventilation ducts.Described ring-type internal water cooling structure 5 also can only be laid in stator hot blast district 3 ventilation ductss one-sided (as shown in Figure 5), can reduce the quantity of cooling water pipe and interface thereof.The outer wall of described ring-type internal water cooling structure 5 can arrange that protruding turbulence structure 10(as shown in Figure 6), contact area with coolant and interior hollow cavity 5-1 in increase stator ventilation ducts, the cooling effect of enhancing to coolant in ventilation ducts, the while can be improved the turbulence level of coolant in stator ventilation ducts.
This ring-type internal water cooling structure that is laid in stator ventilation ducts is particularly suitable for the cooling of the above full air-cooled steam turbine generator of million kilowatt.
Embodiment 1:
In conjunction with Fig. 1 to Fig. 4, the present embodiment is described.
In stator hot blast district 3 ventilation ductss, lay ring-type internal water cooling structure 5, its outer wall is overrided to form by 0.2-0.5mm flake aluminum, tooth top partly cuts into trapezoidal shape, inside is hollow cavity 5-1, its top connects into water pipe 6, below connects outlet pipe 9, oral siphon 6 is connected with cooling water circulating device 4 with outlet pipe 9, form cooling water circulation passage, before motor operation, first open oral siphon 6, close outlet pipe 9, water to be cooled is full of after whole interior hollow cavity 5-1, open again outlet pipe 9, recirculated cooling water in interior hollow cavity 5-1 carries out cooling to the coolant in stator ventilation ducts.
Embodiment 2:
In conjunction with Fig. 5, present embodiment is described, the difference of the present embodiment and embodiment 1 is: it is one-sided that described ring-type internal water cooling structure 5 is only laid in stator hot blast district radial ventilation ditch, thus, only has one group of oral siphon 6 and outlet pipe 9 in stator radial ventilation ditch.
Embodiment 3:
In conjunction with Fig. 6, present embodiment is described, the difference of the present embodiment and embodiment 1 is: alternative arrangement circular protrusions turbulence structure 10 on the outer wall of described ring-type internal water cooling structure 5, this structure can not only can increase the contact area of cooling water in the interior coolant of stator ventilation ducts and hollow cavity 5-1, can strengthen the turbulence level of coolant in stator ventilation ducts, strengthen its cooling stator coil and ability unshakable in one's determination simultaneously.
Claims (7)
1. a ring-type internal water cooling structure that is laid in stator ventilation ducts, is characterized in that: comprise ring-type internal water cooling structure (5), oral siphon (6), outlet pipe (9) and cooling water circulating device (4); Stator core (1) is divided into cold wind district (2) and hot blast district (3) vertically; Cold wind district (2) and hot blast district (3) are alternative arrangement vertically; The coolant flowing out from cooler enters stator radial ventilation ditch through stator yoke back, directly to stator coil (11) and stator core (1), carry out cooling; The coolant being collected by air gap (8) and rotor (7) enters into the radial ventilation ditch in hot blast district (3), cooling stator coil (11) and stator core (1); Described ring-type internal water cooling structure (5) is laid in hot blast district stator radial ventilation ditch, to coolant in ventilation ducts, carries out cooling.
2. the ring-type internal water cooling structure that is laid in stator ventilation ducts according to claim 1, is characterized in that: described ring-type internal water cooling structure (5) is interior hollow-core construction, and it has interior hollow cavity (5-1); Cooling water circulating device (4) is arranged on stator core (1) outside; Between cooling water circulating device (4) and interior hollow cavity (5-1), by oral siphon (6), be communicated with; At interior hollow cavity (5-1), with respect to the opposite side of oral siphon (6), set out water pipe (9), outlet pipe (9) is connected to cooling water circulating device (4); Cooling water circulating device (4), oral siphon (6), interior hollow cavity (5-1), outlet pipe (9) are connected, and have formed cooling water circulation passage.
3. the ring-type internal water cooling structure that is laid in stator ventilation ducts according to claim 1, it is characterized in that: described ring-type internal water cooling structure (5) outer wall is overrided to form by non-magnetic 0.2-0.5mm flake aluminum, to effectively reduce the loss that eddy current causes of inducting of stray field in stator ventilation ducts in described structure.
4. the ring-type internal water cooling structure that is laid in stator ventilation ducts according to claim 1, it is characterized in that: described ring-type internal water cooling structure (5) tooth top partly cuts into trapezoidal shape, the fluid impedance losses while entering stator ventilation ducts to reduce coolant.
5. the ring-type internal water cooling structure that is laid in stator ventilation ducts according to claim 1, is characterized in that: it is one-sided that described ring-type internal water cooling structure (5) is only laid in stator hot blast district (3) ventilation ducts, to reduce the quantity of cooling water pipe and interface thereof.
6. the ring-type internal water cooling structure that is laid in stator ventilation ducts according to claim 1, it is characterized in that: the upper protruding turbulence structure (10) of arranging of described ring-type internal water cooling structure (5), with the contact area of coolant and interior hollow cavity (5-1) in increase stator ventilation ducts, can improve the turbulence level of coolant in stator ventilation ducts simultaneously.
7. the ring-type internal water cooling structure that is laid in stator ventilation ducts according to claim 1, is characterized in that: described coolant comprises air, and hydrogen etc. are for the gas as coolant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544376.4A CN103595189B (en) | 2013-11-05 | 2013-11-05 | Be laid in the ring-type internal water cooling structure of stator ventilation ducts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544376.4A CN103595189B (en) | 2013-11-05 | 2013-11-05 | Be laid in the ring-type internal water cooling structure of stator ventilation ducts |
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| CN103595189A true CN103595189A (en) | 2014-02-19 |
| CN103595189B CN103595189B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310544376.4A Active CN103595189B (en) | 2013-11-05 | 2013-11-05 | Be laid in the ring-type internal water cooling structure of stator ventilation ducts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901480A (en) * | 2015-06-09 | 2015-09-09 | 哈尔滨理工大学 | Non-salient pole generator having encircling water-cooled type stator end portion iron core cooling system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3530320A (en) * | 1967-11-22 | 1970-09-22 | Ass Elect Ind | Stator cooling means for dynamo-electric machines |
| CN1405957A (en) * | 2001-08-15 | 2003-03-26 | 通用电气公司 | Back-flowing stator ventilating system for super conductive synchronous machines |
| JP3564915B2 (en) * | 1996-02-14 | 2004-09-15 | 株式会社日立製作所 | Rotating electric machine |
| CN201570947U (en) * | 2009-10-13 | 2010-09-01 | 上海东润换热设备制造有限公司 | Water-cooling base for motor cooling |
| CN201594780U (en) * | 2009-12-30 | 2010-09-29 | 三一电气有限责任公司 | Motor |
| CN102377286A (en) * | 2011-09-29 | 2012-03-14 | 江苏金风风电设备制造有限公司 | Motor and cooling systeem thereof |
| CN102725945A (en) * | 2009-12-17 | 2012-10-10 | Abb有限公司 | Arrangement and method for cooling an electrical machine |
| CN102761201A (en) * | 2011-04-27 | 2012-10-31 | 西门子公司 | Cooling arrangement for electric machine |
-
2013
- 2013-11-05 CN CN201310544376.4A patent/CN103595189B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3530320A (en) * | 1967-11-22 | 1970-09-22 | Ass Elect Ind | Stator cooling means for dynamo-electric machines |
| JP3564915B2 (en) * | 1996-02-14 | 2004-09-15 | 株式会社日立製作所 | Rotating electric machine |
| CN1405957A (en) * | 2001-08-15 | 2003-03-26 | 通用电气公司 | Back-flowing stator ventilating system for super conductive synchronous machines |
| CN201570947U (en) * | 2009-10-13 | 2010-09-01 | 上海东润换热设备制造有限公司 | Water-cooling base for motor cooling |
| CN102725945A (en) * | 2009-12-17 | 2012-10-10 | Abb有限公司 | Arrangement and method for cooling an electrical machine |
| CN201594780U (en) * | 2009-12-30 | 2010-09-29 | 三一电气有限责任公司 | Motor |
| CN102761201A (en) * | 2011-04-27 | 2012-10-31 | 西门子公司 | Cooling arrangement for electric machine |
| CN102377286A (en) * | 2011-09-29 | 2012-03-14 | 江苏金风风电设备制造有限公司 | Motor and cooling systeem thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901480A (en) * | 2015-06-09 | 2015-09-09 | 哈尔滨理工大学 | Non-salient pole generator having encircling water-cooled type stator end portion iron core cooling system |
| CN104901480B (en) * | 2015-06-09 | 2017-09-05 | 哈尔滨理工大学 | With the non salient pole generator around water-cooled stator end core cooling system |
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| Publication number | Publication date |
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| CN103595189B (en) | 2016-01-13 |
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