JP2008050669A5 - - Google Patents
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- Publication number
- JP2008050669A5 JP2008050669A5 JP2006229608A JP2006229608A JP2008050669A5 JP 2008050669 A5 JP2008050669 A5 JP 2008050669A5 JP 2006229608 A JP2006229608 A JP 2006229608A JP 2006229608 A JP2006229608 A JP 2006229608A JP 2008050669 A5 JP2008050669 A5 JP 2008050669A5
- Authority
- JP
- Japan
- Prior art keywords
- less
- sealing agent
- sprayed layer
- suppressed
- resistance value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000007789 sealing Methods 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000036975 Permeability coefficient Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 210000001736 Capillaries Anatomy 0.000 description 1
- 229920002803 Thermoplastic polyurethane Polymers 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical class O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Description
次に、上記溶射層に封孔処理を施す為の有機系封孔剤として、透湿係数が１０-6cm3・cm/(cm2・s・cmHg) よりも大きく、且つ、吸湿率が０．２％以上である、例えばアクリル樹脂若しくはウレタン樹脂系の封孔剤を使用した場合、この封孔剤が上記溶射層に浸透しにくくなり、絶縁抵抗値にばらつきが生じ易い。これに対し、本例の様に、上記絶縁層６ａに封孔処理を施す為の有機系封孔剤として、エポキシ樹脂若しくはフッ素樹脂系で、透湿係数が１０-6cm3・cm/(cm2・s・cmHg) 以下、且つ、吸湿率が０．２％未満の封孔剤を使用すれば、この封孔剤が上記溶射層に浸透し易くなり、絶縁抵抗値のばらつきを抑えられる。尚、上記封孔剤は、セラミックスの溶射層との濡れ角度が６０度以下で、毛細管現象により含浸するものを用いる事が好ましい。又、本例の場合、セラミックスの溶射層に含まれるチタニアと、シリカと、酸化クロムとの含有量の合計を１重量％以下としている為、セラミックスの親水性を低くでき、この面からも絶縁抵抗値のばらつきを抑えられる。尚、上記含有量の合計を小さくする程、１００℃以下の飽和水蒸気未満の環境下での漏洩電流を少なくできる。この為、上記含有量の合計を、好ましくは０．５重量％以下、より好ましくは０．２重量％以下とする。
この様に、絶縁層６ａの絶縁抵抗値及び密着力のばらつきを抑えられれば、高品質な電食防止用絶縁転がり軸受を、安定して供給できる。
Next, as an organic sealing agent for sealing the sprayed layer, the moisture permeability coefficient is larger than 10 −6 cm 3 · cm / (cm 2 · s · cmHg) and the moisture absorption rate is higher. When an acrylic resin or urethane resin-based sealing agent that is 0.2% or more, for example, is used, the sealing agent is less likely to penetrate into the sprayed layer, and the insulation resistance value tends to vary. On the other hand, as in this example, the organic sealing agent for sealing the insulating layer 6a is an epoxy resin or a fluororesin and has a moisture permeability coefficient of 10 −6 cm 3 · cm / ( cm 2 · s · cmHg) If a sealing agent having a moisture absorption rate of less than 0.2% is used, the sealing agent can easily penetrate into the sprayed layer, and variations in insulation resistance can be suppressed. . In addition, it is preferable to use what the said sealing agent impregnates by the capillary phenomenon that the wetting angle with a ceramic sprayed layer is 60 degrees or less. In the case of this example, since the total content of titania, silica and chromium oxide contained in the ceramic sprayed layer is 1% by weight or less, the hydrophilicity of the ceramic can be lowered, and this surface is also insulated. Variation in resistance value can be suppressed. In addition, the leakage current in the environment below 100 degreeC or less of saturated water vapor | steam can be decreased, so that the sum total of the said content is made small. For this reason, the total content is preferably 0.5% by weight or less, more preferably 0.2% by weight or less.
Thus, if the variation in the insulation resistance value and the adhesion force of the insulating layer 6a can be suppressed, a high-quality insulating rolling bearing for preventing electric corrosion can be stably supplied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006229608A JP5025190B2 (en) | 2006-08-25 | 2006-08-25 | Insulated rolling bearing for electric corrosion prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006229608A JP5025190B2 (en) | 2006-08-25 | 2006-08-25 | Insulated rolling bearing for electric corrosion prevention |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008050669A JP2008050669A (en) | 2008-03-06 |
| JP2008050669A5 true JP2008050669A5 (en) | 2009-09-03 |
| JP5025190B2 JP5025190B2 (en) | 2012-09-12 |
Family
ID=39234991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006229608A Active JP5025190B2 (en) | 2006-08-25 | 2006-08-25 | Insulated rolling bearing for electric corrosion prevention |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5025190B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5850464B2 (en) * | 2013-03-28 | 2016-02-03 | トーカロ株式会社 | Rolling bearing for electric corrosion prevention |
| JP6120361B2 (en) * | 2013-03-28 | 2017-04-26 | トーカロ株式会社 | Method for manufacturing rolling bearing for preventing electrical decoration |
| JP6590686B2 (en) | 2014-12-24 | 2019-10-16 | トーカロ株式会社 | Insulated bearing and bearing coating method |
| CN104789914A (en) * | 2015-03-05 | 2015-07-22 | 中国船舶重工集团公司第七二五研究所 | Preparation method for bearing inner-outer ring electrical insulation coating |
| DE202017101725U1 (en) | 2017-03-24 | 2017-04-11 | Aktiebolaget Skf | Rolling bearing with an electrically insulating layer |
| JP7134639B2 (en) | 2017-03-24 | 2022-09-12 | アクティエボラゲット・エスコーエッフ | Rolling bearing with electrical insulating layer |
| DE102017205015A1 (en) | 2017-03-24 | 2018-09-27 | Aktiebolaget Skf | Rolling bearing with an electrically insulating layer |
| CN108754401A (en) * | 2018-09-07 | 2018-11-06 | 德清创智科技股份有限公司 | Prevent the thermal spraying insulating coating and preparation method thereof that shaft current generates |
| JP7304710B2 (en) * | 2018-09-27 | 2023-07-07 | Ntn株式会社 | Thermal spraying material for electrolytic corrosion prevention rolling bearings |
| US11525479B2 (en) | 2018-09-27 | 2022-12-13 | Ntn Corporation | Anti-electrolytic corrosion rolling bearing |
| US11920862B2 (en) | 2019-12-19 | 2024-03-05 | Praxair Technology, Inc. | Methods and apparatuses for using dry ice containers |
-
2006
- 2006-08-25 JP JP2006229608A patent/JP5025190B2/en active Active
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