CN103560620B - A kind of method reducing the temperature rise of Half Speed collector ring with high current device - Google Patents
A kind of method reducing the temperature rise of Half Speed collector ring with high current device Download PDFInfo
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- CN103560620B CN103560620B CN201310572077.1A CN201310572077A CN103560620B CN 103560620 B CN103560620 B CN 103560620B CN 201310572077 A CN201310572077 A CN 201310572077A CN 103560620 B CN103560620 B CN 103560620B
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Abstract
The invention provides a kind of reduction Half Speed collector ring with high current device temperature rise method, object improves the current capacity of Half Speed collector machine.In the present invention, collector machine is by increasing diameter, increase carbon brush quantity, optimize the layout of carbon brush on collector ring, increase centrifugal fan diameter simultaneously, and optimize collector machine ventilating system, make slip ring surface temperature rise be reduced to tolerance band≤80K, the present invention is that Half Speed collector ring with high current device reduction temperature rise provides a kind of effective method, makes the current capacity of collector ring bring up to 10000A grade.
Description
Technical field
The present invention relates to a kind of reduction Half Speed collector ring with high current device temperature rise method, belong to turbo generator technical field.
Background technology
In large turbo-type generator, usual exciting current access generator has two kinds of modes, and one is gang brushfree magnetizing machine mode, and another kind is collector machine mode.Collector ring mode utilizes the static carbon brush in device on brush holder and rotates being coupled of current collection interannular exciting current accessed generator.Collector machine is comparatively simple with its structure, axle system stable, fast response time and be subject to user's favor.The exciting current needed along with generator increases, and requires that the current capacity of collector machine improves, and the temperature rise in collector machine becomes the technical bottleneck of development with cooling.
Loss in collector machine is the electrical loss composition between carbon brush and slip ring primarily of the wind friction loss between carbon brush and slip ring and exciting current.The heat that various loss produces generally is taken away by centrifugal fan and ventilating system thereof by collector machine.
For conventional thermoelectricity two pole generator, general exciting current is in below 6000A.Along with the exploitation of large nuclear-power generator techniques, the above nuclear power generator majority of million kilowatt adopts quaternary structure, and the exciting current of generator increases to 9000A-10000A grade.The rotating speed of four-pole generator is the half of two pole generators, because rotating speed reduces by half, centrifugal fan cooling effect greatly reduces thereupon, simultaneously, along with exciting current increases, the electrical loss of collector ring also increases thereupon, thus the slip ring surface temperature rise of collector machine is improved, and carbon brush and slip ring surface working condition will more become bottleneck.For this reason, in the urgent need to seeking a kind of method reducing the temperature rise of Half Speed collector ring with high current device.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reduction Half Speed collector ring with high current device temperature rise method, makes slip ring surface temperature rise be reduced within tolerance band, ensures the normal operation of Half Speed collector ring with high current device.
In order to solve the problems of the technologies described above, technical scheme of the present invention there is provided a kind of method reducing the temperature rise of Half Speed collector ring with high current device, it is characterized in that: step is:
Step 1, the diameter of collector ring is increased to 430-470mm, the axial arrangement at least 3 being assemblied in each slip ring on collector ring is arranged, is often arranged circumference at least 10 composite type brush carriers, each composite type brush carrier assembling at least 6 carbon brush;
Step 2, the diameter of the centrifugal fan between a pair slip ring is increased to 1100-1300mm, centrifugal fan adopts high-strength alloy Steel material; Collector ring outer cover on whole Half Speed collector ring with high current device outer cover, thus it forms complete circulating ventilation system;
The gap of step 3, reduction centrifugal fan external diameter and air-ducting ring, thus wind district is intercepted into high-pressure blast district and low-pressure air district;
Step 4, in the large space that composite type brush carrier is arranged axial mounting block aerofoil, force cooling-air to concentrate heating place of cooling slip ring and carbon brush, improve cooling effect.
Preferably, the diameter of described collector ring increases to 450mm.
Preferably, the diameter of described centrifugal fan increases to 1200mm.
Preferably, the gap of described centrifugal fan external diameter and described air-ducting ring is decreased to 2.5mm.
The present invention is by increasing collector ring diameter, increase carbon brush quantity, optimize the layout of carbon brush on collector ring, increase centrifugal fan diameter simultaneously, and optimize collector machine ventilating system, make slip ring surface temperature rise be reduced to tolerance band≤80K, prove through overtesting, the present invention is that Half Speed collector ring with high current device reduction temperature rise provides a kind of effective method, makes the current capacity of Half Speed collector ring bring up to 10000A grade.
Accompanying drawing explanation
Fig. 1 is a kind of Half Speed collector ring with high current apparatus structure schematic diagram in the embodiment of the present invention;
Fig. 2 is current collection annulate shaft and brush rocker structure schematic diagram in the present embodiment;
Fig. 3 be in the present embodiment brush carrier circumferentially with deep bead schematic diagram, in figure:
1-collector ring outer cover; 2-current collection annulate shaft; 3-hydraulic pressure sliding bearing; 4-composite type brush carrier; 5-conductive plate; 6-air-ducting ring; 7-centrifugal fan; 8-slip ring; 9-carbon brush; 10-deep bead.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, the present invention will be further described.
Composition graphs 1 to Fig. 3, the invention provides a kind of reduction Half Speed collector ring with high current device temperature rise method, the steps include:
The diameter of step 1, increase collector ring 2 is to 450mm, and carbon brush 9 quantity is increased to 360, optimizes the layout of carbon brush 9 on collector ring 2, reduces the current density of each carbon brush, prevent the local overheating of carbon brush.Each slip ring 8 axial arrangement 3 be assemblied on collector ring 2 is arranged, often arrange circumference 10 composite type brush carriers 4, and each composite type brush carrier 4 assembles 6 carbon brush 9.
Step 2, increase the diameter of the centrifugal fan 7 between a pair slip ring 8 to 1200mm, make up because rotating speed declines the fan loss in head caused, force in the unit interval and have more cold air Air flow collector ring, reduce the temperature rise of Half Speed collector ring with high current device.Change the material of centrifugal fan 7, adopt high-strength alloy Steel material, enable fan bear the STRESS VARIATION of corresponding increase because external diameter increases; Collector ring outer cover 1 on whole device outer cover, thus form airtight circulating ventilation system.
Wind district, to 2.5mm, is intercepted into high-pressure blast district and low-pressure air district by the gap of step 3, reduction centrifugal fan 7 external diameter and air-ducting ring 6, reduces the loss in head of centrifugal fan, improves cooling effect.
Step 4, in the large space that composite type brush carrier 4 is arranged axial mounting block aerofoil 10, optimize collector ring cooling-fan installation, force cooling-air to concentrate heating place of cooling slip ring 8 and carbon brush 9, improve cooling effect.
The present invention proves through overtesting, and collector ring 2 surface temperature rise is reduced to tolerance band≤80K, provides a kind of effective method, make the current capacity of Half Speed collector ring bring up to 10000A grade for Half Speed collector ring with high current device reduces temperature rise.
Claims (4)
1. reduce a method for Half Speed collector ring with high current device temperature rise, it is characterized in that: step is:
Step 1, the diameter of collector ring (2) is increased to 430-470mm, the axial arrangement at least 3 being assemblied in the often pair of slip ring (8) on collector ring (2) is arranged, is often arranged circumference at least 10 composite type brush carriers (4), each composite type brush carrier (4) assembling at least 6 carbon brush (9);
Step 2, the diameter of the centrifugal fan (7) be positioned between a pair slip ring (8) is increased to 1100-1300mm, centrifugal fan (7) adopts high-strength alloy Steel material; Collector ring outer cover (1) on whole Half Speed collector ring with high current device outer cover, thus form complete circulating ventilation system;
The gap of step 3, reduction centrifugal fan (7) external diameter and air-ducting ring (6), thus wind district is intercepted into high-pressure blast district and low-pressure air district;
Step 4, large space axis mounting block aerofoil (10) of arranging at composite type brush carrier (4), force cooling-air to concentrate heating place of cooling slip ring (8) and carbon brush (9), improve cooling effect.
2. a kind of method reducing the temperature rise of Half Speed collector ring with high current device as claimed in claim 1, is characterized in that: the diameter of described collector ring (2) increases to 450mm.
3. a kind of method reducing the temperature rise of Half Speed collector ring with high current device as claimed in claim 1, is characterized in that: the diameter of described centrifugal fan (7) increases to 1200mm.
4. a kind of method reducing the temperature rise of Half Speed collector ring with high current device as claimed in claim 1, is characterized in that: the gap of described centrifugal fan (7) external diameter and described air-ducting ring (6) is decreased to 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572077.1A CN103560620B (en) | 2013-11-15 | 2013-11-15 | A kind of method reducing the temperature rise of Half Speed collector ring with high current device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572077.1A CN103560620B (en) | 2013-11-15 | 2013-11-15 | A kind of method reducing the temperature rise of Half Speed collector ring with high current device |
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| CN103560620A CN103560620A (en) | 2014-02-05 |
| CN103560620B true CN103560620B (en) | 2015-08-26 |
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| CN201310572077.1A Active CN103560620B (en) | 2013-11-15 | 2013-11-15 | A kind of method reducing the temperature rise of Half Speed collector ring with high current device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH567826A5 (en) * | 1973-02-12 | 1975-10-15 | Hitachi Ltd | |
| US4137474A (en) * | 1974-06-04 | 1979-01-30 | Kraftwerk Union Aktiengesellschaft | Gas-cooled slip ring for electrical machines |
| JPS58108947A (en) * | 1981-12-23 | 1983-06-29 | Fuji Electric Co Ltd | Current collecting ring unit for rotary electric machine |
| JPS58192454A (en) * | 1982-04-30 | 1983-11-09 | Hitachi Ltd | Cooler for brush of rotary electric machine |
| CN1606215A (en) * | 2003-10-10 | 2005-04-13 | 株式会社日立制作所 | Cooling device of current collector |
| CN201594781U (en) * | 2009-08-24 | 2010-09-29 | 山西防爆电机（集团）有限公司 | Heat dissipation and carbon powder prevention device of motor collecting ring component |
-
2013
- 2013-11-15 CN CN201310572077.1A patent/CN103560620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH567826A5 (en) * | 1973-02-12 | 1975-10-15 | Hitachi Ltd | |
| US4137474A (en) * | 1974-06-04 | 1979-01-30 | Kraftwerk Union Aktiengesellschaft | Gas-cooled slip ring for electrical machines |
| JPS58108947A (en) * | 1981-12-23 | 1983-06-29 | Fuji Electric Co Ltd | Current collecting ring unit for rotary electric machine |
| JPS58192454A (en) * | 1982-04-30 | 1983-11-09 | Hitachi Ltd | Cooler for brush of rotary electric machine |
| CN1606215A (en) * | 2003-10-10 | 2005-04-13 | 株式会社日立制作所 | Cooling device of current collector |
| CN201594781U (en) * | 2009-08-24 | 2010-09-29 | 山西防爆电机（集团）有限公司 | Heat dissipation and carbon powder prevention device of motor collecting ring component |
Non-Patent Citations (1)
| Title |
|---|
| 《大电流集电环的研究》;张德学;《大电机技术》;19890630(第3期);第25-29页 * |
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| CN103560620A (en) | 2014-02-05 |
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