CN104009556A - Stator through bolt insulating device for improving ventilation performance of pump storage group - Google Patents
Stator through bolt insulating device for improving ventilation performance of pump storage group Download PDFInfo
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- CN104009556A CN104009556A CN201410220703.5A CN201410220703A CN104009556A CN 104009556 A CN104009556 A CN 104009556A CN 201410220703 A CN201410220703 A CN 201410220703A CN 104009556 A CN104009556 A CN 104009556A
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- screw rod
- insulating
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator through bolt insulating device for improving ventilation performance of a pump storage group. insulating blankets are arranged in clearances between stator laminations, through bolts are fixed in the stator laminations in a penetrating mode, each insulating mat comprises an insulating sleeve pipe and one insulating blanket, air inlet pipes are evenly distributed in the insulating blankets in the radial direction and are communicated with axial air guide grooves, the axis of each through bolt is designed to be a hollow cavity to be communicated with the lamination clearances through air inlets and annular grooves. The stator through bolt insulating device can well support the stator laminations, and insulation performance can be obviously improved through the insulating sleeve pipes and the insulation mats which are in sealing butt joint. The improved structure has no effect on other structures of a generator motor, insulation performance and ventilation performance of group stators are improved, and reliability of the overall group is improved.
Description
Technical field
The present invention relates to pumped storage unit aeration technology field, be specifically related to a kind of stator core through screw rod seal that pumped storage unit ventilates that improves.
Background technology
The generator motor stator core of pumped storage unit, pipe top edge is the top edge in ventilation slot just in time, in the time of unit operation, carries out cooling by ventilation slot to stator.But due to this structure, long-play can accumulate a large amount of impurity between sleeve pipe, lamination and core through screw rod, the time one is long, causes generator motor stator insulation to reduce, and does not meet the demands, and affects the normal operation of unit.Through the structure of core through screw rod and stator lasmination is analyzed, take to lengthen the length of core through screw rod sleeve pipe, even if core through screw rod sleeve pipe passes under the structure that the ventilation slot kind of stator lasmination is new, unit circulation of air in the time of operation just can not cause the accumulation of impurity.Thereby solve the defect that the insulation of generator motor core through screw rod reduces.
Part hydroenergy storage station is underground power house formula structure, and generator motor pattern is vertical shaft, suspension type, three-phase, air cooling reversible synchronous machine.Mainly formed by following major part: stator, rotor, macro-axis, upper bracket, lower bearing bracket, thrust bearing, top guide bearing, lower guide bearing etc.Generator motor stationary part is made up of support, iron core, winding, and stator core adopts low-loss (when B=4/3T, unit≤1W/Kg), high-quality, high permeability, the high-quality cold-reduced silicon sheet that is 0.35mm without timeliness, thickness.Laminating of lamination adopts staggered folding, and staged and layered compresses method, is fixed by 57 stator core through screw rod, and final compaction pressure is 1250N.m.
Summary of the invention
The object of the invention is, in order to solve the defect that the insulation of generator motor core through screw rod reduces and aeration structure is unreasonable and exist, provides a kind of stator core through screw rod seal that can improve pumped storage unit ventilation effect.
The solution of the present invention: a kind of stator core through screw rod seal that improves the ventilation of pumped storage unit, in lamination gap between stator lasmination, be provided with insulating blanket, core through screw rod runs through and is fixed in stator lasmination, described insulating blanket is to be contained in the insulating sleeve between core through screw rod and stator lasmination by a series of sealing shrouds, and by radially expansion formation insulating blanket of insulating sleeve outside, and insulating blanket is positioned at pad gap, the radially uniform air inlet pipe that is provided with in insulating blanket; Madial wall at insulating sleeve is provided with axial air slot vertically, and described air inlet pipe is communicated with axial air slot; Meanwhile, the axle center of described core through screw rod is set to cavity, and the lateral wall of core through screw rod is provided with axial remittance air drain vertically, in axial remittance air drain, is provided with the air admission hole being communicated with cavity.Outside at core through screw rod is also provided with annular groove, and together with annular groove meets at axial remittance air drain, described air admission hole is arranged in annular groove.In described insulating sleeve, in insulating blanket or be respectively arranged with hard skeleton in air inlet pipe.
Beneficial effect of the present invention: the present invention improves the structure that technology still retains stator lasmination and core through screw rod, insulating sleeve and insulation spacer be support stator lamination well, and the insulating sleeve docking by sealing and insulation spacer can significantly improve insulation property.And the insulating sleeve of utilization sealing docking and insulation spacer, as ventilation channel, can reach the effect of evenly bleeding, and suction pressure can be provided, and avoid stopping up and occurring the only phenomenon of regional ventilation because of part in existing stator lasmination venting process.Axial remittance air drain on core through screw rod is communicated with annular groove, is communicated with the axial air slot of insulating sleeve madial wall and annular groove is inevitable, and no matter how core through screw rod rotates, and can not seal current path.Structure after improvement does not affect other structures of generator motor, but has improved insulation property and the venting capability of generator unit, has improved the global reliability of unit.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the vertical view of a certain section of insulating sleeve in Fig. 1;
Fig. 3 is the sectional perspective schematic diagram of core through screw rod in Fig. 1.
Number in the figure, 1 is core through screw rod, and 2 is cavity, and 3 is air admission hole, and 4 is the axial air drain that converges, and 5 is annular groove, and 6 is insulating sleeve, and 7 is air inlet pipe, and 8 is axial air slot, and 9 is stator lasmination, and 10 is lamination gap.
Embodiment
Fig. 1 is a kind of device that can improve pumped storage unit performance of ventilating and insulation property, stator core is piled up and is formed by multiple stator lasminations 9, whole piling height is 2930mm, is provided with equally distributed ventilation slot, ventilation slot be by fold into special yoke sheet form.Core through screw rod 1 runs through and is fixed in stator lasmination 9.The whole tension of stator lasmination 9 mainly completes by core through screw rod 1.Each stator lasmination 9 is fixing by three core through screw rod 1.
Referring to Fig. 1 and Fig. 2, insulating blanket is to be contained in the insulating sleeve 6 between core through screw rod 1 and stator lasmination 9 by a series of sealing shrouds, and insulating sleeve 6 is made by polytetrafluoroethylmaterial material, mainly works to clamp core through screw rod 1 and insulation.Formation insulating blanket is radially expanded in insulating sleeve 6 outsides, and insulating blanket is positioned at pad gap 10.In insulating blanket, the radially uniform air inlet pipe 7 that is provided with, is provided with axial air slot 8 vertically at the madial wall of insulating sleeve, thereby air inlet pipe 7 is communicated with axial air slot 8, and lamination gap 10 is communicated with the axial air slot 8 of insulating sleeve inwall.
Referring to Fig. 3, the axle center of described core through screw rod 1 is set to cavity 2, and the lateral wall of core through screw rod 1 is provided with axial remittance air drain 4 vertically.Meanwhile, be also provided with annular groove 5 in the outside of core through screw rod 4, together with annular groove 5 meets at axial remittance air drain 4, air admission hole 3 is arranged in annular groove 5.The annular groove 5 arranging due to core through screw rod 1 lateral wall is vertical with the axial air slot of insulating sleeve 6 madial walls, so both always meet at together.No matter core through screw rod 1 rotates to any position, and lamination gap 10 communicates all the time with annular groove 5.Annular groove 5 is communicated with cavity 2 by axial remittance air drain 4 and the air admission hole 3 of core through screw rod sidewall.Thereby, realized the gas channel that gather to cavity 2 in the lamination gap 10 from disperseing.Because each insulating sleeve 6 sealings are docking together, so the good airproof performance of this gas channel is conducive to improve air pressure, realize air-flow Uniform Flow object.Insulation property significantly improve simultaneously.For the support strength of reinforced insulation sleeve pipe 6 and insulation spacer, prevent local collapse, can be in insulating sleeve, in insulating blanket or be respectively arranged with hard skeleton in air inlet pipe.
Claims (3)
1. one kind is improved the stator core through screw rod seal that pumped storage unit ventilates, in lamination gap between stator lasmination, be provided with insulating blanket, core through screw rod runs through and is fixed in stator lasmination, it is characterized in that: described insulating blanket is to be contained in the insulating sleeve between core through screw rod and stator lasmination by a series of sealing shrouds, and by radially expansion formation insulating blanket of insulating sleeve outside, and insulating blanket is positioned at pad gap, the radially uniform air inlet pipe that is provided with in insulating blanket; Madial wall at insulating sleeve is provided with axial air slot vertically, and described air inlet pipe is communicated with axial air slot; Meanwhile, the axle center of described core through screw rod is set to cavity, and the lateral wall of core through screw rod is provided with axial remittance air drain vertically, in axial remittance air drain, is provided with the air admission hole being communicated with cavity.
2. the stator core through screw rod seal that raising pumped storage unit according to claim 1 ventilates, it is characterized in that: the outside at core through screw rod is also provided with annular groove, together with annular groove meets at axial remittance air drain, described air admission hole is arranged in annular groove.
3. the stator core through screw rod seal that raising pumped storage unit according to claim 1 ventilates, is characterized in that: in described insulating sleeve, in insulating blanket or be respectively arranged with hard skeleton in air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220703.5A CN104009556B (en) | 2014-05-23 | 2014-05-23 | Improve the stator core through screw rod seal that pump-storage generator ventilates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220703.5A CN104009556B (en) | 2014-05-23 | 2014-05-23 | Improve the stator core through screw rod seal that pump-storage generator ventilates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104009556A true CN104009556A (en) | 2014-08-27 |
| CN104009556B CN104009556B (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410220703.5A Active CN104009556B (en) | 2014-05-23 | 2014-05-23 | Improve the stator core through screw rod seal that pump-storage generator ventilates |
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| Country | Link |
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| CN (1) | CN104009556B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861417A (en) * | 2019-03-05 | 2019-06-07 | 中国电建集团华东勘测设计研究院有限公司 | A kind of stator iron core of hydraulic generator core through screw rod structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11266555A (en) * | 1998-03-16 | 1999-09-28 | Toshiba Corp | Rotor for rotary electric machine |
| JP2002010538A (en) * | 2000-06-28 | 2002-01-11 | Mitsubishi Electric Corp | Dynamo-electric machine |
| CN201556981U (en) * | 2009-11-27 | 2010-08-18 | 哈尔滨电机厂有限责任公司 | Compressing and insulating structure for adjusting screw-free stator core of high-capacity vertical hydraulic generator |
| CN201918809U (en) * | 2011-02-12 | 2011-08-03 | 贵阳新光电气有限公司 | Combined spacer sleeve for insulating and sealing stator iron core and tightening screw of power generator |
| CN203850932U (en) * | 2014-05-23 | 2014-09-24 | 国家电网公司 | Stator through-core screw rod insulation device capable of improving ventilation of water pumping energy storage unit |
-
2014
- 2014-05-23 CN CN201410220703.5A patent/CN104009556B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11266555A (en) * | 1998-03-16 | 1999-09-28 | Toshiba Corp | Rotor for rotary electric machine |
| JP2002010538A (en) * | 2000-06-28 | 2002-01-11 | Mitsubishi Electric Corp | Dynamo-electric machine |
| CN201556981U (en) * | 2009-11-27 | 2010-08-18 | 哈尔滨电机厂有限责任公司 | Compressing and insulating structure for adjusting screw-free stator core of high-capacity vertical hydraulic generator |
| CN201918809U (en) * | 2011-02-12 | 2011-08-03 | 贵阳新光电气有限公司 | Combined spacer sleeve for insulating and sealing stator iron core and tightening screw of power generator |
| CN203850932U (en) * | 2014-05-23 | 2014-09-24 | 国家电网公司 | Stator through-core screw rod insulation device capable of improving ventilation of water pumping energy storage unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861417A (en) * | 2019-03-05 | 2019-06-07 | 中国电建集团华东勘测设计研究院有限公司 | A kind of stator iron core of hydraulic generator core through screw rod structure |
| CN109861417B (en) * | 2019-03-05 | 2024-04-02 | 中国电建集团华东勘测设计研究院有限公司 | Hydraulic generator stator core through screw rod structure |
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| Publication number | Publication date |
|---|---|
| CN104009556B (en) | 2016-06-08 |
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