JP3009516B2 - Anti-corrosion rolling bearing - Google Patents
Anti-corrosion rolling bearingInfo
- Publication number
- JP3009516B2 JP3009516B2 JP3209473A JP20947391A JP3009516B2 JP 3009516 B2 JP3009516 B2 JP 3009516B2 JP 3209473 A JP3209473 A JP 3209473A JP 20947391 A JP20947391 A JP 20947391A JP 3009516 B2 JP3009516 B2 JP 3009516B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling bearing
- insulating resin
- sealing treatment
- permeability
- layer
- 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.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/30—Electric properties; Magnetic properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Description
【０００１】[0001]
【産業上の利用分野】この発明は、鉄道車両のモータ軸
受や車軸用軸受として用いられる転がり軸受に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing used as a motor bearing or axle bearing of a railway vehicle.
【０００２】[0002]
【従来の技術】鉄道車両のモータ軸受として用いられる
転がり軸受は、車両の接地用集電装置が不完全な場合に
モータの電流が転がり軸受を通って接地電流が流れる。
このとき、軸受転動体と外輪転走面との間又は内輪転走
面との間で放電が生じ、放電部分に電食を生じることが
ある。2. Description of the Related Art In a rolling bearing used as a motor bearing of a railway vehicle, when a current collecting device for grounding the vehicle is incomplete, a motor current flows through the rolling bearing.
At this time, electric discharge may occur between the bearing rolling element and the outer raceway, or between the inner raceway, and electrolytic corrosion may occur in the discharge part.
【０００３】このような電食を防止するため、軸受軌道
輪の外表面にセラミックス等の絶縁体の溶射皮膜を形成
することが有効な手段であることを従来から知られてい
る。また、上記溶射皮膜にクラックが発生し溶射皮膜中
の空孔に水分等の導電物質が浸透することを防止するた
め、溶射皮膜の空孔に合成樹脂を含浸して封孔処理を施
すことも知られている（実開昭６０−８５６２６号公
報）。In order to prevent such electrolytic corrosion, it has been conventionally known that it is effective means to form a thermal spray coating of an insulator such as ceramic on the outer surface of a bearing race. Further, in order to prevent the conductive material such as moisture from penetrating into the pores in the sprayed coating due to the occurrence of cracks in the sprayed coating, the pores of the sprayed coating may be impregnated with a synthetic resin to perform a sealing treatment. It is known (Japanese Utility Model Laid-Open No. 60-85626).
【０００４】[0004]
【発明が解決しようとする課題】上記の封孔処理のため
に使用される合成樹脂として、メタクリル酸エステル樹
脂等の低粘度で浸透性良好な絶縁樹脂を用いた場合は、
水分の浸入や温度上昇によって絶縁抵抗が低下し、電食
の防止が不完全になる問題がある。When an insulating resin having low viscosity and good permeability such as methacrylate resin is used as a synthetic resin used for the above-mentioned sealing treatment,
There is a problem that insulation resistance is reduced due to infiltration of water and a rise in temperature, and prevention of electrolytic corrosion is incomplete.
【０００５】また、エポキシ樹脂等の高粘度で浸透性が
完全でない絶縁樹脂を用いた場合は、温度上昇によって
絶縁抵抗が低下する問題はあるが、水分の浸入による絶
縁抵抗の低下はほとんどない。When an insulating resin such as an epoxy resin and the like having a high viscosity and imperfect permeability is used, there is a problem that the insulation resistance decreases due to a rise in temperature, but the insulation resistance hardly decreases due to the ingress of moisture.
【０００６】そこで、この発明は溶射皮膜に封孔処理を
施した場合に水分の浸入や温度上昇の影響を排除し、高
い絶縁性能を保持できる電食防止型転がり軸受を提供す
ることを課題とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an anti-corrosion rolling bearing capable of maintaining high insulation performance by eliminating the effects of water intrusion and temperature rise when a thermal spray coating is subjected to sealing treatment. I do.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明は軌道輪の外表面に多孔質性セラミック
ス等の絶縁体の溶射皮膜を形成した電食防止型転がり軸
受において、上記溶射皮膜に浸透性良好な絶縁樹脂によ
る封孔処理層を下層とし、浸透性が完全でない、絶縁樹
脂による封孔処理層を上層とする組合せ層を形成するこ
とにより封孔した構成としたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electrolytic corrosion prevention type in which a thermal spray coating of an insulator such as a porous ceramic is formed on the outer surface of a raceway. In the rolling bearing, the thermal spray coating was sealed by forming a combination layer having a sealing treatment layer formed of an insulating resin having good permeability and a lower layer having a poor permeability, and a sealing treatment layer formed of the insulating resin being an upper layer. It is configured.
【０００８】[0008]
【実施例】図１に示すように、実施例の電食防止型転が
り軸受は、内輪１と外輪２との間に保持器３に保持され
た多数のころ４を介在させたものであり、外輪２は軸受
箱５に収納され、軸６が内輪１の内径に固定される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an anti-corrosion type rolling bearing according to an embodiment has a large number of rollers 4 held by a retainer 3 between an inner ring 1 and an outer ring 2. The outer ring 2 is housed in a bearing housing 5, and the shaft 6 is fixed to the inner diameter of the inner ring 1.
【０００９】上記外輪２の外表面には、アルミナ、グレ
イアルミナ、ジルコニア等電気絶縁性のセラミックスを
溶射することにより形成された溶射皮膜７が存在する。
この溶射皮膜７自体は多孔質であり、その空孔８（図２
参照）を封孔するために絶縁樹脂が用いられる。On the outer surface of the outer ring 2, there is a thermal spray coating 7 formed by thermal spraying an electrically insulating ceramic such as alumina, gray alumina, zirconia.
The thermal spray coating 7 itself is porous, and its pores 8 (FIG. 2)
Insulating resin is used to seal the holes.
【００１０】この発明の場合は、封孔に用いる絶縁樹脂
として、浸透性良好な絶縁樹脂（例えば、メタクリル酸
エステル樹脂）と浸透性が完全でない絶縁樹脂（例え
ば、エポキシ樹脂）を組合せて用いる。両者の組合せ方
法は、図２に示すように、浸透性良好な絶縁樹脂による
封孔処理層９を下層にして、その上に浸透性が完全でな
い絶縁樹脂による封孔処理層１０を形成する。 In the case of the present invention, an insulating resin having good permeability (for example, methacrylic acid ester resin) and an insulating resin having incomplete permeability (for example, epoxy resin) are used in combination as the insulating resin used for sealing. As shown in FIG. 2, in a method of combining the two, a sealing treatment layer 9 made of an insulating resin having good permeability is set as a lower layer, and a sealing treatment layer 10 made of an insulating resin having imperfect permeability is formed thereon .
【００１１】また、どの封孔処理層９、１０についても
１回の処理に限らず、２回にしてもよく、またいずれか
一方の封孔処理層９（又は１０）について２回、他方の
封孔処理層１０（又は９）については１回の処理を行な
うといった組合せも可能である。Further, any one of the sealing treatment layers 9 and 10 is not limited to one treatment, and may be performed twice, and one of the sealing treatment layers 9 (or 10) is performed twice and the other is treated twice. For the sealing treatment layer 10 (or 9), a combination of performing one treatment is also possible.
【００１２】なお、外輪回転形の転がり軸受の場合は、
上記のごとき封孔処理層を施した溶射皮膜７は、内輪１
の外表面に形成される。In the case of an outer ring rotating type rolling bearing,
The sprayed coating 7 provided with the sealing treatment layer as described above is the inner ring 1
Formed on the outer surface of the
【００１３】また、内輪回転、外輪回転のいずれの形式
においても内輪１と外輪２の両方の外表面に同様の処理
層を形成してもよい。In any of the inner ring rotation and the outer ring rotation, a similar treatment layer may be formed on the outer surfaces of both the inner ring 1 and the outer ring 2.
【００１４】〔実験例〕厚さ０．５mmのセラミックス溶
射皮膜を形成し、これにメタクリル酸エステル樹脂によ
り２回、次にエポキシ樹脂により１回の封孔処理を行な
った軸受軌道輪につき、絶縁抵抗の温度依存性を測定し
た結果を図４に示す。図４の曲線Ａ、Ｂは比較例であ
り、曲線Ｃはこの発明の場合である。曲線Ａは封孔処理
剤としてシリカ系樹脂のみを用いた場合、Ｂはエポキシ
系樹脂のみを用いた場合である。EXPERIMENTAL EXAMPLE A ceramic sprayed coating having a thickness of 0.5 mm was formed, and the bearing race was subjected to sealing treatment twice with a methacrylate resin and then once with an epoxy resin. FIG. 4 shows the result of measuring the temperature dependence of the resistance. Curves A and B in FIG. 4 are comparative examples, and curve C is for the present invention. Curve A shows the case where only the silica-based resin was used as the sealing agent, and B shows the case where only the epoxy-based resin was used.
【００１５】[0015]
【発明の効果】以上のように、この発明によれば、浸透
性が完全でない絶縁樹脂が水分の浸入を防止するので水
分の浸入を原因とする絶縁抵抗の低下を避けることがで
きる。また、温度上昇による絶縁抵抗は、浸透性良好な
絶縁樹脂と浸透性が完全でない絶縁樹脂との組合せによ
り、温度上昇による絶縁抵抗の低下を大幅に改善するこ
とができる。特に、浸透性が良好な絶縁樹脂を下層とし
ているため、溶射被膜の空孔の先端まで流動し、かつ、
浸透性が完全でない絶縁樹脂を上層に形成した組合わせ
層としているため、空孔が完全に封孔され、上記のよう
な優れた効果が達成される。 As described above, according to the present invention, the insulating resin having imperfect permeability prevents the infiltration of moisture, so that a decrease in insulation resistance due to the infiltration of moisture can be avoided. In addition, the insulation resistance due to temperature rise can be significantly improved by a combination of an insulating resin having good permeability and an insulation resin having imperfect permeability. In particular, an insulating resin with good permeability is used as the lower layer.
Because it flows to the tip of the pores of the thermal spray coating, and
Combination of insulating resin with imperfect permeability formed on the upper layer
As a layer, the pores are completely sealed and
Excellent effects are achieved.
【図１】実施例の一部拡大断面図FIG. 1 is a partially enlarged sectional view of an embodiment.
【図２】同上の封孔部分の概略断面図FIG. 2 is a schematic sectional view of a sealing portion of the above.
【図３】絶縁抵抗温度依存性の実験結果のグラフFIG. 3 is a graph of an experimental result of temperature dependence of insulation resistance.
１ 内輪 ２ 外輪 ３ 保持器 ４ ころ ５ 軸受箱 ６ 軸 ７ 溶射皮膜 ８ 空孔 ９ 封孔処理層 １０ 封孔処理層 DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 3 Cage 4 Roller 5 Bearing box 6 Shaft 7 Thermal spray coating 8 Void 9 Sealing treatment layer 10 Sealing treatment layer
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 33/62 F16C 33/64 ──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F16C 33/62 F16C 33/64
Claims (1)
等の絶縁体の溶射皮膜を形成した電食防止型転がり軸受
において、上記溶射皮膜に浸透性良好な絶縁樹脂による
封孔処理層を下層とし、浸透性が完全でない絶縁樹脂に
よる封孔処理層を上層とする組合せ層を形成することに
より封孔したことを特徴とする電食防止型転がり軸受。1. An anti-corrosion rolling bearing in which a sprayed coating of an insulator such as a porous ceramic is formed on the outer surface of a raceway, a sealing treatment layer made of an insulating resin having good permeability to the sprayed coating is provided below . and then, characterized that the electrolytic corrosion preventing type rolling bearing that has been sealed by forming a combination layer of the sealing treatment layer by permeability not completely insulating resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3209473A JP3009516B2 (en) | 1991-08-21 | 1991-08-21 | Anti-corrosion rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3209473A JP3009516B2 (en) | 1991-08-21 | 1991-08-21 | Anti-corrosion rolling bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0552223A JPH0552223A (en) | 1993-03-02 |
| JP3009516B2 true JP3009516B2 (en) | 2000-02-14 |
Family
ID=16573439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3209473A Expired - Lifetime JP3009516B2 (en) | 1991-08-21 | 1991-08-21 | Anti-corrosion rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3009516B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4887571B2 (en) * | 2001-05-24 | 2012-02-29 | 日本精工株式会社 | Pulley device |
| GB0308957D0 (en) | 2003-04-17 | 2003-05-28 | Lillishall Plastics And Engine | Tolerance ring assembly |
| JP2005133876A (en) | 2003-10-31 | 2005-05-26 | Ntn Corp | Electrical corrosion prevention rolling bearing |
| WO2005059386A1 (en) | 2003-12-16 | 2005-06-30 | Ntn Corporation | Rolling bearing |
| WO2007049727A1 (en) | 2005-10-27 | 2007-05-03 | Nsk Ltd. | Insulating rolling bearing for use in prevention of electric corrosion, method for manufacture thereof, and bearing device |
| US8172463B2 (en) | 2006-03-08 | 2012-05-08 | Ntn Corporation | Rolling bearing with a ceramic coating and method for manufacturing the same |
| JP4746503B2 (en) * | 2006-09-15 | 2011-08-10 | Ｎｔｎ株式会社 | Anti-corrosion rolling bearing for motor |
| JP4920066B2 (en) * | 2009-09-18 | 2012-04-18 | Ｎｔｎ株式会社 | Electric corrosion prevention type rolling bearing |
| JP2011117607A (en) * | 2011-02-22 | 2011-06-16 | Ntn Corp | Electrolytic-corrosion-resistant rolling bearing |
| DE102013104186A1 (en) | 2013-04-25 | 2014-10-30 | Coatec Gmbh | Bearing ring, electrically insulating coating and method for applying an electrically insulating coating |
| JP2016156409A (en) * | 2015-02-23 | 2016-09-01 | Ntn株式会社 | Rolling bearing |
| 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 |
-
1991
- 1991-08-21 JP JP3209473A patent/JP3009516B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0552223A (en) | 1993-03-02 |
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