CN100426631C - Method for preparing low-resistance corona-prevention belt of high-voltage motor - Google Patents
Method for preparing low-resistance corona-prevention belt of high-voltage motor Download PDFInfo
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- CN100426631C CN100426631C CNB2006101508473A CN200610150847A CN100426631C CN 100426631 C CN100426631 C CN 100426631C CN B2006101508473 A CNB2006101508473 A CN B2006101508473A CN 200610150847 A CN200610150847 A CN 200610150847A CN 100426631 C CN100426631 C CN 100426631C
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Abstract
This invention relates to high voltage motor and low resistance anti-air process method, which comprises the following steps: adopting alkali-free glass band or polyester cloth band; b, single or mixture oxygen, phenol aldehyde or polyester resin, toluene alcohol and acetone to form parent liquid and then adding it with black lead, carbon and plant oil adjusting agent for mixing into even liquid; c, putting the matched liquid into tank for dipping; d, putting the band diped with liquid into gap yoke machine then into drying furnace to process low anti-air band.
Description
Technical field
The present invention relates to the preparation method of motor corona-prevention belt.
Background technology
Employing low resistance anti-corona material great majority in high-voltage motor stator coil straight line position are materials such as semi-solid preparation (not bone dry) or brush low-resistance lacquer at present, like this, after coil hot compression molding or few glue vacuum pressure impregnation (VPI) insulation moulding, cause the surface resistivity instability, exceed standard and pollute quality accident such as main insulation impregnating varnish.In addition, coil in embedding stator slot after, coil straight line low resistivity layer contacts bad with cell wall, contact site and cell wall will not produce bigger voltage difference (groove current potential).Coil low resistivity layer surface resistivity height, the electric field strength that the surface does not produce between contact site and the stator coring groove will produce coil low resistivity layer surface and cell wall corona, discharge corrosion phenomenon during greater than the electrical strength of air; Coil low resistivity layer surface resistivity is low, will have very big electric current to pass through along the coil surface, causes burn coil main insulation, easily causes motor ground connection major accident, shortens motor service life greatly.
Summary of the invention
The present invention causes slot part low-resistance corona-prevention layer often to produce phenomenons such as corona discharge, corrosion burn in order to solve the resistivity instability on existing low-resistance anticorona material surface; A kind of preparation method of low-resistance corona-prevention belt of high-voltage motor is provided, and the concrete technical scheme that addresses the above problem is as follows:
The preparation method's of low-resistance corona-prevention belt of high-voltage motor of the present invention step is as follows:
Step 1, employing 0.06 ± 0.02mm * 25mm electrician use alkali-free glass wool braid over braid or polyester non-woven fabric band;
Step 2, to adopt by weight percentage be the double solvents of 82～55% toluene, alcohol and acetone by 18%～45% single epoxy, phenolic aldehyde or mylar, by weight percentage, the part by weight of toluene, alcohol and acetone is 1: 1: 1, be mixed with mother liquor, in mother liquor, add 15～30% graphite, 2～8% carbon black and 2～5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid;
Step 3, with the electrician of step 1 with alkali-free glass wool braid over braid or polyester non-woven fabric band, put into the groove that the liquid that step 2 prepares is housed, constantly stir with blender, make the liquid in the groove evenly not have precipitation, make alkali-free glass wool braid over braid or polyester non-woven fabric band dipping evenly;
Step 4, then with the alkali-free glass wool braid over braid of steeping liq or polyester non-woven fabric band by gap roller machine (control corona-prevention belt thickness), at the uniform velocity entering Temperature Distribution with the speed of 5m/min～40m/min solidifies at 50 ℃～400 ℃ drying oven inner drying, adopt stepless speed-regulating motor or the at the uniform velocity rolling of other method, making surface resistivity is the low-resistance corona-prevention belt of 200 Ω～50000 Ω.
Low-resistance corona-prevention belt of high-voltage motor sheet resistance value stabilization of the present invention, use at high-voltage motor stator coil straight line (slot part), finished product coil straight line low-resistance corona-prevention laminar surface resistivity is in 200 Ω～100000 Ω scopes, reach standard laid down by the ministries or commissions of the Central Government high-class product index, reduce the motor slot current potential, avoid corona discharge corrosion phenomenon in the motor slot, improve motor service life.
Embodiment
Embodiment one: the step that present embodiment prepares low-resistance corona-prevention belt is as follows:
Step 1, employing 0.06 ± 0.02mm * 25mm electrician use alkali-free glass wool braid over braid or polyester non-woven fabric band;
Step 2, adopt single or the epoxy, phenolic aldehyde or the mylar that mix by weight percentage by 18%～45%, toluene, alcohol and acetone is 82～55% double solvents by weight percentage, the ratio of toluene, alcohol and acetone is 1: 1: 1, be mixed with mother liquor, in mother liquor, add 15～30% graphite, 2～8% carbon black and 2～5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid;
Step 3, with the electrician of step 1 with alkali-free glass wool braid over braid or polyester non-woven fabric band, put into the groove that the liquid that step 2 prepares is housed, constantly stir with electric mixer, make the liquid in the groove evenly not have precipitation, make alkali-free glass wool braid over braid or polyester non-woven fabric band dipping evenly;
Step 4, the alkali-free glass wool braid over braid of steeping liq or polyester non-woven fabric band are placed on (clearance control corona-prevention belt thickness) on the roller machine of gap then and at the uniform velocity enter Temperature Distribution with the speed of 5m/min～40m/min and solidify at 50 ℃～400 ℃ drying oven inner drying, drying oven is vertical or horizontal, length is in 3m～10m scope, with stepless speed-regulating motor or the at the uniform velocity rolling of other method, making surface resistivity is the low-resistance corona-prevention belt of 200 Ω～50000 Ω.
Embodiment two: the step 2 of present embodiment and embodiment one are different be by weight percentage by mylar be 18%, toluene, alcohol and acetone are 82% double solvents, the ratio of toluene, alcohol and acetone is 1: 1: 1, be mixed with mother liquor, in mother liquor, add 15% graphite, 8% carbon black and 2% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid.Surface resistivity is at 200 Ω～800 Ω.Other step is identical with embodiment one.
Embodiment three: the step 2 of present embodiment and embodiment one are different be by weight percentage by phenolic aldehyde and mylar be 30%, toluene, alcohol and acetone are 70% double solvents, the ratio of toluene, alcohol and acetone is 1: 1: 1, be mixed with mother liquor, in mother liquor, add 22% graphite, 4% carbon black and 3.5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid.Surface resistivity is at 1000 Ω～4000 Ω.Other step is identical with embodiment one.
Embodiment four: the step 2 of present embodiment and embodiment one are different be by weight percentage by epoxy and phenolic resins be 45%, toluene, alcohol and acetone are 55% double solvents, the ratio of toluene, alcohol and acetone is 1: 1: 1, be mixed with mother liquor, in mother liquor, add 30% graphite, 2% carbon black and 5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid.Surface resistivity is at 7000 Ω～50000 Ω.Other step is identical with embodiment one.
Claims (4)
1, the preparation method of low-resistance corona-prevention belt of high-voltage motor is characterized in that the step of this method is as follows:
Step 1, employing 0.06 ± 0.02mm * 25mm electrician use alkali-free glass wool braid over braid or polyester non-woven fabric band;
Step 2, to adopt by weight percentage be the double solvents of 82～55% toluene, alcohol and acetone by 18%～45% single or the epoxy, phenolic aldehyde or the mylar that mix, by weight percentage, the part by weight of toluene, alcohol and acetone is 1: 1: 1, be mixed with mother liquor, in mother liquor, add 15～30% graphite, 2～8% carbon black and 2～5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid;
Step 3, with the electrician of step 1 with alkali-free glass wool braid over braid or polyester non-woven fabric band, put into the groove that the liquid that step 2 prepares is housed, constantly stir with blender, make the liquid in the groove evenly not have precipitation, make alkali-free glass wool braid over braid or polyester non-woven fabric band dipping evenly;
Step 4, then with the alkali-free glass wool braid over braid of steeping liq or polyester non-woven fabric band by gap roller machine, clearance control corona-prevention belt thickness, at the uniform velocity entering Temperature Distribution with the speed of 5m/min～40m/min solidifies at 50 ℃～400 ℃ drying oven inner drying, drying oven is vertical or horizontal, length is in 3m～10m scope, with stepless speed-regulating motor or the at the uniform velocity rolling of other method, making surface resistivity is the low-resistance corona-prevention belt of 200 Ω～50000 Ω.
2, the preparation method of low-resistance corona-prevention belt of high-voltage motor according to claim 1, it is characterized in that step 2 be by weight percentage by mylar be 18%, toluene, alcohol and acetone are 82% double solvents, be mixed with mother liquor, in mother liquor, add 15% graphite, 8% carbon black and 2% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid.
3, the preparation method of low-resistance corona-prevention belt of high-voltage motor according to claim 1, it is characterized in that step 2 be by weight percentage by phenolic aldehyde and mylar be 30%, toluene, alcohol and acetone are 70% double solvents, be mixed with mother liquor, in mother liquor, add 22% graphite, 4% carbon black and 3.5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid.
4, the preparation method of low-resistance corona-prevention belt of high-voltage motor according to claim 1, it is characterized in that step 2 be by weight percentage by epoxy and phenolic resins be 45%, toluene, alcohol and acetone are 55% double solvents, be mixed with mother liquor, in mother liquor, add 30% graphite, 2% carbon black and 5% vegetable oil by the percentage that accounts for mother liquor weight again and adjust agent, stir into uniform liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101508473A CN100426631C (en) | 2006-09-29 | 2006-09-29 | Method for preparing low-resistance corona-prevention belt of high-voltage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101508473A CN100426631C (en) | 2006-09-29 | 2006-09-29 | Method for preparing low-resistance corona-prevention belt of high-voltage motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1929249A CN1929249A (en) | 2007-03-14 |
| CN100426631C true CN100426631C (en) | 2008-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101508473A Expired - Fee Related CN100426631C (en) | 2006-09-29 | 2006-09-29 | Method for preparing low-resistance corona-prevention belt of high-voltage motor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039803A (en) * | 2017-12-20 | 2018-05-15 | 苏州巨峰电气绝缘系统股份有限公司 | A kind of aqueous environment protection corona-prevention belt and preparation method thereof |
| CN110815960B (en) * | 2019-10-31 | 2022-07-26 | 上海电气电站设备有限公司 | Accelerant-containing expanded felt material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3660592A (en) * | 1970-02-27 | 1972-05-02 | Haveg Industries Inc | Anti-corona electrical conductor |
| CN1558532A (en) * | 2004-01-14 | 2004-12-29 | 东方电机股份有限公司 | Stator bar coating type corona protective layer and its making process |
| US20060097600A1 (en) * | 2004-11-01 | 2006-05-11 | Alstom Technology Ltd. | Device for improving the protection of a construction unit against electrical corona discharges |
-
2006
- 2006-09-29 CN CNB2006101508473A patent/CN100426631C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3660592A (en) * | 1970-02-27 | 1972-05-02 | Haveg Industries Inc | Anti-corona electrical conductor |
| CN1558532A (en) * | 2004-01-14 | 2004-12-29 | 东方电机股份有限公司 | Stator bar coating type corona protective layer and its making process |
| US20060097600A1 (en) * | 2004-11-01 | 2006-05-11 | Alstom Technology Ltd. | Device for improving the protection of a construction unit against electrical corona discharges |
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| CN1929249A (en) | 2007-03-14 |
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Granted publication date: 20081015 Termination date: 20130929 |