CN1060285C - Sealing element of special high-voltage electric appliance - Google Patents
Sealing element of special high-voltage electric appliance Download PDFInfo
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- CN1060285C CN1060285C CN95107847A CN95107847A CN1060285C CN 1060285 C CN1060285 C CN 1060285C CN 95107847 A CN95107847 A CN 95107847A CN 95107847 A CN95107847 A CN 95107847A CN 1060285 C CN1060285 C CN 1060285C
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- sealing element
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Abstract
The present invention relates to a sealing element which is mainly made of rubber and is used for a special high-voltage electric appliance, particularly to a sealing element which is suitable for being used as a transformer. The rubber component of the sealing element comprises rubber, carbon black, accelerating agents, peroxide, sulfur, preprocessing short fiber and other ordinary compounding agents for rubber industry, wherein when the sealing element comprises 100 shares of rubber, 10 to 70 shares of carbon black, 2 to 5 shares of accelerating agents, 0.9 to 2.2 shares of peroxide, 0.1 to 0.6 share of sulfur and 10 to 50 shares of preprocessing short fiber, the performance index of the sealing element can reach 80 DEG of A-type hardness, 20.5Mpa of tensile strength and 50% of maximum elongation. The reliability and the durability of the sealing element are obviously improved.
Description
The present invention relates to a kind of Special high-voltage electrical equipment seal take rubber as main component, be particularly suitable for doing the seal of transformer.
Some High-Voltage Electrical Appliances particularly seal of transformer are different from other seal, and main cause is that this seal environment for use is abominable, and relevant performance requirement is very harsh. The transformer seal, long-term exposing outside is exposed to the elements, exposure in sunshine, and be in for a long time under the very high pressure state, so the sizing material of seal must have higher resistance to weathering energy and electrical insulation capability, and little compression set must be arranged. In addition, because the higher-pressure region of transformer has than high-intensity magnetic field, can produce electric arc when meeting rainy weather, magnetic field and electric arc all can intensify the oxygen in the transformer surrounding air, thereby produce ion-oxygen, i.e. ozone, and therefore, seal piece size also must have ozone resistance. In addition, also require the transformer seal to have UV resistant irradiation, transformer oil resistant, the performance such as cold-resistant, pollute transformer oil and adapt to severe cold area preventing.
For above requirement, northwest rubber research institute and transformer research center, Shenyang, jointly developed successfully the seal piece size prescription of code name for " P815 ", but seal does not still reach desirable reliability and durability, still can not satisfy the harsh requirement of transformer sealing. In recent years, the applicant had developed the another kind of sizing compound formula that is better than " P815 " prescription, but seal be full of cracks and transformer oil impregnate problem still do not obtain radical cure.
Therefore, task of the present invention is on the basis of existing technology, and a kind of new seal piece size prescription and corresponding Special high-voltage electrical equipment seal are provided, and improves durability and the reliability of seal.
Special high-voltage electrical equipment seal, its sizing material composition comprises acrylonitrile-butadiene rubber, neoprene, carbon black, promoter, peroxide, Sulfur, pretreated short fibre and other general rubber industry compounding ingredient, when rubber content (by weight) is 100 parts, carbon black content is 10-70 part, promoter 2-5 part, peroxide 0.9-2.2 part, Sulfur 0.1-0.6 part, pretreated short fibre 10-50 part.
The seal piece size prescription is to guarantee the seal inherent quality, determines the main aspect of its reliability and durability. The main raw material(s) of above-mentioned prescription has adopted acrylonitrile-butadiene rubber and good neoprene and the usefulness of ozone resistance of the good middle high acrylonitrile content of oil resistance. Vulcanizing system then is the high short vulcanizing system of low-sulfur and peroxide vulcanizing system and uses, the high short vulcanizing system of low-sulfur (being the promoter+a small amount of Sulfur of higher amount) exists the shortcoming that time of scorch is short, compression is large, and during peroxide cure, the high temperature tear resistance is poor, two vulcanizing systems are also used, both solve the problem that the sizing material time of scorch is short, compression is large, also improved the high temperature resistant tear resistance of sizing material.
Bare bones of the present invention is the selection of reinforcing agent, has especially used pretreated short fibre as reinforcing agent. Pretreated short fibre is a kind of filler by the common development of Beijing University of Chemical Technology and Heilongjiang Province's Fujin City rubber plant. This filler reinforcing property is high, processing performance is good, gives birth to low, the easy dispersion of heat. The present invention selects pretreated short fibre as reinforcing agent, has effectively improved the physical property of seal.
Method and result that the seal that makes according to sizing compound formula of the present invention is made a service test are as follows:
One, test material and the place of production
1, produce in neoprene Qingdao
2, produce in acrylonitrile-butadiene rubber Qingdao
3, carbon black plant, carbon black Luoyang
4, pretreated short fibre Fujin rubber plant
5, other general rubber industry compounding ingredient
Two, testing equipment
1, mixing: 6 cun mills
2, sulfuration: 25 tons of vulcanizing presses
3, XU-strength tester (Changsha product)
4, ageing oven
Three, test method
1, hardness test: undertaken by GB531-83
2, strength and extension property test: undertaken by GB523-81
3, density measurement: undertaken by GB533-81
4, resistance to liquid can be tested: undertaken by GB1690-82
5, permanent compression test: undertaken by GB1683-81
Four, result of the test
1, (1) Shao Er A type hardness tester (degree) 80; (2) hot strength (MPa) 20.5; (3) elongation at break (%) 50%.
2, air oven aging test (100 ℃ * 161h): (1) hardness 82; (2) hot strength 18.5; (3) elongation at break 40%.
3, anti-liquid (transformer oil resistant) test (100 ℃ * 70h): (1) hot strength 19; (2) elongation at break 45%; (3) weight changes+4.7.
4, permanent compression test (100 ℃ * 70h, hot-air 20%): 25%.
Five, the actual qualification test of using
Suppress respectively glue pearl exemplar (50 of the present invention's prescription of three kinds of specifications (φ 12 * 25 * 14, φ 16 * 35 * 14, φ 11.5 * 28.5 * 16) with identical mould by sizing compound formula of the present invention and prior art prescription, 15 of prior art prescription), offer applying unit (Jinan will friend limited company, Zhengzhou transformer factory and Liuzhou transformer factory) carry out reliability and durability contrast test, result of the test is as shown in table 1.
By 9 months Continuous Observation test, Special high-voltage electrical equipment seal exemplar all passed through to satisfy 250 days life test, has satisfied instructions for use, proves that the reliability of the seal and durability are significantly improved.
Show according to above test, the physical property of Special high-voltage electrical equipment seal provided by the present invention, the technical merit that has not only surpassed " P815 " prescription and applicant's original formulation, make inherent quality, reliability and the durability of seal that by a relatively large margin raising be arranged, satisfied the harsh requirement of transformer and the sealing of other High-Voltage Electrical Appliances, and opened up new road for the quality and the technical merit that improve the transformer sealing, established new basis.
The below describes the present invention.
The sizing material composition of Special high-voltage electrical equipment seal, when rubber content (weight portion) was 100 parts, carbon black content was 10-70 part, 2-5 parts of promoter, peroxide 0.9-2.2 part, Sulfur 0.1-0.6 part, pretreated short fibre 10-50 part; Also contain other an amount of general rubber industry compounding ingredient. Table 2 provides the content range of four groups of concrete formulation datas and each composition.
Sizing compound formula provided by the invention, the breakthrough of most critical are to have added pretreated short fibre, and this is the basis that guarantees the seal inherent quality. In addition, acrylonitrile-butadiene rubber and neoprene and usefulness, the high short vulcanizing system of low-sulfur and peroxide vulcanizing system and usefulness also are the main points of prescription of the present invention.
Promoter is adopted acrylonitrile-butadiene rubber Vulcanization accelerator TMTD (thiuram disulphide) and the DM (disulfide group propyl benzene thiazole) commonly used that oil resistivity is good, compression set is low; Peroxide adopts DCP (cumyl peroxide). In sizing compound formula, also contain an amount of activator (magnesia, zinc oxide, stearic acid), plasticizer (bizinc resin DBP, dibutylester DOP) and age resistor (MB 4010NA).
The conditions of vulcanization of sizing compound formula of the present invention is: (13-18) ' * (165 ± 5 ℃), generally speaking, best conditions of vulcanization is 165 ℃ * 15 '.
The production technology of seal can be carried out with reference to traditional handicraft of the prior art, and is as shown in table 3. Table 1 actual service test result
Four groups of concrete formulation datas of table 2 and each component content scope (weight portion)
Table 3 Special high-voltage electrical equipment seal production technology
| Service time | The exemplar of prior art sizing compound formula | The exemplar of sizing compound formula of the present invention |
| 3 months | Slight be full of cracks | Without be full of cracks |
| 6 months | The be full of cracks aggravation | Be full of cracks is slightly arranged, and naked eyes can be debated |
| 9 months | Oil impregnate | Be full of cracks obviously can be debated |
| Acrylonitrile-butadiene rubber | 50 | 40 | 70 | 80 | 80-40 |
| Neoprene | 50 | 60 | 30 | 20 | 20-60 |
| Age resistor | 3 | 3 | 2 | 2.5 | 0-3.5 |
| Magnesia | 4 | 4 | 5 | 3 | 3-6 |
| Zinc oxide | 5 | 5 | 6 | 4 | 3-6 |
| Stearic acid | 1 | 1 | 1.5 | 2 | 1-3 |
| Carbon black (high wear-resistant carbon black and semi-reinforcing hydrocarbon black) | 40 | 50 | 30 | 20 | 10-70 |
| Cold-resistant plasticizer | 10 | 12 | 8 | 7 | 7-15 |
| Sulfur | 0.2 | 0.2 | 0.3 | 0.3 | 0.1-0.6 |
| Peroxide | 1.8 | 1.8 | 1.6 | 1.5 | 0.9-2.2 |
| Promoter | 3 | 3 | 2.5 | 3.5 | 2-5 |
| Pretreated short fibre | 30 | 35 | 40 | 45 | 10-50 |
| Composition | The first assembly side | The second assembly side | The 3rd assembly side | The 4th assembly side | Range of variables |
| Cut glue-→ weighing-→ rubber close refining-→ add short fiber-→ add promoter-→ add 50% carbon black-→ add 50% plasticizer-→ add other 50% carbon black-→ add other 50% plasticizer-→ add small powder (other compounding ingredient)-→ Sulfur-→ slice (sizing material)-→ park from lack cooling in 24 hours stand-by → turn refining-→ slice-→ extrude-→ weighing-→ sulfuration-→ deburring-→ check-→ packing-→ warehouse-in. |
Claims (2)
1. High-Voltage Electrical Appliances seal, its sizing material composition comprises acrylonitrile-butadiene rubber, neoprene, carbon black, promoter, peroxide, Sulfur and pretreated short fibre, by weight, when rubber content was 100 parts, carbon black content was 10-70 part, promoter 2-5 part, peroxide 0.9-2.2 part, Sulfur 0.1-0.6 part, pretreated short fibre 10-50 part.
2. by seal claimed in claim 1, it is characterized in that: also contain age resistor 0-3.5 part in the sizing material, magnesia 3-6 part, zinc oxide 3-6 part, stearic acid 1-3 part, cold-resistant plasticizer 7-15 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95107847A CN1060285C (en) | 1995-07-17 | 1995-07-17 | Sealing element of special high-voltage electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95107847A CN1060285C (en) | 1995-07-17 | 1995-07-17 | Sealing element of special high-voltage electric appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1140888A CN1140888A (en) | 1997-01-22 |
| CN1060285C true CN1060285C (en) | 2001-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95107847A Expired - Fee Related CN1060285C (en) | 1995-07-17 | 1995-07-17 | Sealing element of special high-voltage electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060285C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101118027B (en) * | 2006-07-31 | 2012-05-30 | 中山市邦达实业有限公司 | Communicating sealed ring and method for making same |
| CN102863665B (en) * | 2012-09-27 | 2014-10-29 | 青岛开世密封工业有限公司 | Chloroprene rubber mixed compound nonstick to rolls and method for preparing chloroprene rubber mixed compound |
| CN103881169B (en) * | 2014-04-10 | 2016-04-27 | 山东豪迈机械科技股份有限公司 | Resistance to electrical spark oil rubber protective cover and preparation method thereof |
| CN105754162A (en) * | 2016-02-26 | 2016-07-13 | 广东电网有限责任公司电力科学研究院 | Insulated oil-resistant sealing rubber and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036390A (en) * | 1988-04-07 | 1989-10-18 | 唐德森 | Insulation oil resisting rubber goods and manufacture method |
-
1995
- 1995-07-17 CN CN95107847A patent/CN1060285C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036390A (en) * | 1988-04-07 | 1989-10-18 | 唐德森 | Insulation oil resisting rubber goods and manufacture method |
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| Publication number | Publication date |
|---|---|
| CN1140888A (en) | 1997-01-22 |
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