JP2006300131A - Bearing device for rolling stock - Google Patents

Bearing device for rolling stock Download PDF

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JP2006300131A
JP2006300131A JP2005119612A JP2005119612A JP2006300131A JP 2006300131 A JP2006300131 A JP 2006300131A JP 2005119612 A JP2005119612 A JP 2005119612A JP 2005119612 A JP2005119612 A JP 2005119612A JP 2006300131 A JP2006300131 A JP 2006300131A
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bearing device
lip
oil
rubber
seal
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Japanese (ja)
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Keisuke Yokoyama
景介 横山
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NSK Ltd
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NSK Ltd
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    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • 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
    • F16C19/34—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 both radial and axial load
    • F16C19/38—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 both radial and axial load with two or more rows of rollers
    • F16C19/383—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 both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—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 both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—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 both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Material Composition (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device comprising seal members with excellent weather resistance in addition to workability and excellent in weatherability. <P>SOLUTION: This bearing device for a rolling stock comprises a slinger abutting on both ends of an inner ring and an oil seal means having a lip in slidable contact with the outer peripheral surface of the slinger and fixed to both end parts of an outer ring. The lip of the oil seal means is formed of a rubber composition containing, as a plasticizer, a compound having a hydrocarbon chain with a viscosity of 10 mPas to 600 mPas at 25°C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、鉄道車両の車軸支持に用いられる軸受装置に関し、詳しくはリップと油切りとの腹当たりを防止するのに有効なオイルシール手段を備えた鉄道車両用転軸受装置に関する。   The present invention relates to a bearing device used for supporting an axle of a railway vehicle, and more particularly to a rolling bearing device for a railway vehicle provided with an oil seal means effective to prevent the lip and the oil drain from hitting each other.

図１は、オイルシール手段を備える従来の鉄道車両用軸受装置（以下、「軸受装置」という）１００の一例を示す断面図である。図示される軸受装置１００は、鉄道車両に用いられる軸受の一例である複列円錐ころ軸受（以下、「軸受」という）１１０と、軸受１１０に装着された車軸１２０とを有している。軸受１１０は、一体型の外輪１１１と各列に個別に分割された内輪１１２と内輪間座１１３とを備え、内輪１１２と外輪１１１との間には、軸受１１０の周方向に配置され、保持器１１４に保持された複数のころ１１５が配置されている。軸受１１０の軸方向両端面には、それぞれ主軸１２０と一体となって回転し、内輪１１２と当接する筒状の油切り１２１が配置されている。   FIG. 1 is a cross-sectional view showing an example of a conventional railway vehicle bearing device (hereinafter referred to as “bearing device”) 100 having an oil seal means. The illustrated bearing device 100 includes a double-row tapered roller bearing (hereinafter referred to as “bearing”) 110 which is an example of a bearing used in a railway vehicle, and an axle 120 mounted on the bearing 110. The bearing 110 includes an integrated outer ring 111, an inner ring 112 and an inner ring spacer 113 that are individually divided into each row, and is disposed between the inner ring 112 and the outer ring 111 in the circumferential direction of the bearing 110 and is retained. A plurality of rollers 115 held by the vessel 114 are arranged. Cylindrical oil drains 121 that rotate integrally with the main shaft 120 and abut against the inner ring 112 are disposed on both end surfaces of the bearing 110 in the axial direction.

油切り１２１の軸受１００寄りの外周側には、異なる内径の円筒部材を連結し、段を有する筒状のシールケース１２２が配置されている。シールケース１２２の軸受１１０側の一端部は外輪１１１に嵌合固定され、他端部は油切り１２１の外周面付近に配置されている。また、シールケース１２２の内周側には、環状のオイルシール１３０が取り付けられ、軸受装置１００の内部に、ごみ、水分、異物等が外部から侵入するのを防ぐとともに、軸受装置１００内のグリース等の潤滑剤が外部に漏出するのを防いでいる。   A cylindrical seal case 122 having a step by connecting cylindrical members having different inner diameters is disposed on the outer peripheral side of the oil drain 121 near the bearing 100. One end of the seal case 122 on the bearing 110 side is fitted and fixed to the outer ring 111, and the other end is arranged near the outer peripheral surface of the oil drain 121. An annular oil seal 130 is attached to the inner peripheral side of the seal case 122 to prevent dust, moisture, foreign matter, etc. from entering the bearing device 100 from the outside, and the grease in the bearing device 100. This prevents the lubricant from leaking outside.

オイルシール１３０は、図２に拡大断面図で示すように、環状で、複数の金属部材を組み合わせてなる、内周側に開口した略断面コ字状の外周部１３１と、外周部１３１の内周側端部に接着された樹脂からなるシール部材１３２とから構成されている。オイルシール１３０は、その外周部１３１の外周側がシールケース１２２の内周側に固着され、オイルシール１３０の内周側に位置するシール部材１３２が油切り１２１の外周面に摺接することで、軸受内部を外部から密閉している。ここで、シール部材１３２は、軸受１１０寄りの内側リップ１３３と、内側リップ１３３から間隔を隔てて配置されている外側リップ１３４とを有している。内側リップ１３３及び外側リップ１３４は、オイルシール１３０の全周にわたって配置されている。軸受装置１００が作動している際には、これらのリップ１３３，１３４が、油切り１２１の外周面と摺動している。なお、内側リップ１３３には、内側リップ１３３を油切り１２１の外周面側へ付勢するためのガータスプリング１３５が取り付けられている。   As shown in an enlarged cross-sectional view in FIG. 2, the oil seal 130 is a ring-shaped outer peripheral portion 131 that is formed by combining a plurality of metal members and has an approximately U-shape that is open to the inner peripheral side. It is comprised from the sealing member 132 which consists of resin adhere | attached on the peripheral side edge part. In the oil seal 130, the outer peripheral side of the outer peripheral portion 131 is fixed to the inner peripheral side of the seal case 122, and the seal member 132 located on the inner peripheral side of the oil seal 130 is in sliding contact with the outer peripheral surface of the oil drain 121. The inside is sealed from the outside. Here, the seal member 132 has an inner lip 133 near the bearing 110 and an outer lip 134 that is disposed at a distance from the inner lip 133. The inner lip 133 and the outer lip 134 are arranged over the entire circumference of the oil seal 130. When the bearing device 100 is operating, the lips 133 and 134 slide with the outer peripheral surface of the oil drain 121. A garter spring 135 for urging the inner lip 133 toward the outer peripheral surface of the oil drain 121 is attached to the inner lip 133.

ところで、転がり軸受では、潤滑剤中に水分が混入すると大きく低下することが知られている。例えば、古村らは、潤滑剤（＃１８０タービン油）に６％の水が混入すると、混入しない場合に比べて数分の１〜２０分の１に転がり疲れ強さが低下することを報告している（古村 恭三郎、城田 伸一、平川 清：表面起点および内部起点の転がり疲れについて、NSK Bearing Journal, No.636, pp.1-10, 1977）。また、Schatzbergらは、潤滑油中にわずか１００ｐｐｍの水分が混入するだけで、鋼の転がり強さが３２〜４８％も低下することを報告している（P.Schatzberg, I.M.Felsen：Effects of water and oxygen during rolling contact lubrication, wear, 12, pp.331-342, 1985）。   By the way, in rolling bearings, it is known that when moisture is mixed in the lubricant, it greatly decreases. For example, Furumura et al. Reported that when 6% water was mixed in the lubricant (# 180 turbine oil), the rolling fatigue strength was reduced by a factor of 1 to 20 times compared to the case where it was not mixed. (Furumura Shinzaburo, Shirota Shinichi, Hirakawa Kiyoshi: NSK Bearing Journal, No.636, pp.1-10, 1977). Schatzberg et al. Also reported that the rolling strength of steel decreased by 32 to 48% when only 100 ppm of water was mixed in the lubricating oil (P. Schatzberg, IMFelsen: Effects of water). and oxygen during rolling contact lubrication, wear, 12, pp.331-342, 1985).

このような理由から、上記の軸受装置１００でも図示されるような接触型のシール部材１３２を備えるオイルシール１３０が用いられている。そして、シール部材１３２は、良好な加工性を得るために可塑剤を配合したゴム組成物からなる成形体が一般的であり、ゴムとの相溶性やコスト等を考慮して、可塑剤の選定が行われている（例えば、特許文献１参照）。しかし、軸受装置１００は種々の環境で使用され、特に低温下ではシール部材１３２の柔軟性が低下してリップ１３３，１３４の追従性が低下し、十分な密封性を発現しなくなる可能性がある。その結果、軸受装置１００の内部への水や塵埃等の侵入を許し軸受寿命の低下を招くことになる。   For this reason, the oil seal 130 including the contact-type seal member 132 as illustrated in the above-described bearing device 100 is also used. The seal member 132 is generally a molded body made of a rubber composition blended with a plasticizer in order to obtain good processability. The plasticizer is selected in consideration of compatibility with rubber, cost, and the like. (For example, refer to Patent Document 1). However, the bearing device 100 is used in various environments, and particularly at low temperatures, the flexibility of the seal member 132 is lowered, the followability of the lips 133 and 134 is lowered, and there is a possibility that sufficient sealing performance is not exhibited. . As a result, intrusion of water, dust or the like into the bearing device 100 is permitted, and the bearing life is reduced.

特許第３３５１８７２号公報Japanese Patent No. 3351873

上記のように、軸受装置１００のシール部材１３２には、加工性に加えて、低温時のシール性能（耐寒性）も要求されてきているが、従来のシール部材１３２では十分に対応できていない状況にある。そこで、本発明は、加工性に加えて、耐寒性にも優れるシール部材を備え、耐候性に優れた軸受装置を提供することを目的とする。   As described above, the seal member 132 of the bearing device 100 is required to have a low-temperature seal performance (cold resistance) in addition to workability, but the conventional seal member 132 cannot sufficiently cope with it. Is in the situation. Therefore, an object of the present invention is to provide a bearing device that includes a seal member that is excellent in cold resistance in addition to workability and that is excellent in weather resistance.

本発明は、上記の目的を達成するために、内輪の両端に当接する油切りと、該油切りの外周面と摺接するリップを有し、外輪の両端部に固定されるオイルシール手段とを備えた軸受装置において、オイルシール手段のリップが、可塑剤として、２５℃における粘度１０ｍＰａ・ｓ以上６００ｍＰａ・ｓ以下で、炭化水素鎖を有する化合物を含有するゴム組成物からなることを特徴とする軸受装置を提供する。   In order to achieve the above-mentioned object, the present invention comprises an oil drainer that comes into contact with both ends of the inner ring, and an oil seal means that has a lip that is in sliding contact with the outer peripheral surface of the oil drainer and is fixed to both ends of the outer ring. In the bearing device provided, the lip of the oil seal means is made of a rubber composition containing, as a plasticizer, a compound having a viscosity of 10 mPa · s to 600 mPa · s at 25 ° C. and having a hydrocarbon chain. A bearing device is provided.

本発明では、シール部材を形成するゴム組成物に特定の可塑剤を配合したため、該シール部材は、加工性は勿論のこと、耐寒性にも優れたものとなり、このシール部材を備える軸受装置は耐候性に優れ、長寿命となる。   In the present invention, since a specific plasticizer is blended in the rubber composition forming the seal member, the seal member has excellent cold resistance as well as processability. Excellent weather resistance and long life.

以下、本発明に関して詳細に説明する。   Hereinafter, the present invention will be described in detail.

本発明においては、接触型のリップを有するオイルシール手段を備える限り、軸受装置の構成自体には制限がなく、例えば図１に示した構成の軸受装置１００を例示することができる。また、オイルシール手段も、下記に示すゴム組成物からなること以外は制限がなく、例えば図１及び図２に示した構成のシール部材１３２を備えるものを例示することができる。   In the present invention, as long as an oil seal means having a contact-type lip is provided, the configuration of the bearing device itself is not limited. For example, the bearing device 100 having the configuration shown in FIG. 1 can be exemplified. Also, the oil seal means is not limited except that it is made of the rubber composition shown below, and examples thereof include those provided with the seal member 132 having the structure shown in FIGS. 1 and 2.

ゴム組成物は、合成ゴムをベース材料とする。中でも、耐熱性、耐油性、耐グリース性等を考慮すると、アクリロニトリルブタジエンゴム（ニトリルゴム、ＮＢＲ）、アクリルゴム、フッ素ゴムが好ましい。また、アクリロニトリルブタジエンゴムを水素化した水素添加アクリロニトリルブタジエンゴム、イソプレンを共重合させたアクリロニトリルブタジエンイソプレンゴム、分子内にカルボキシル基を導入したカルボキシル化アクリロニトリルブタジエンゴム、カルボキシル化アクリロニトリルブタジエンゴムを水素化したカルボキシル化水素添加アクリロニトリルブタジエンゴム等の各種変性アクリロニトリルブタジエンゴムも使用できる。これらのアクリロニトリルブタジエンゴムは、２種以上を混合して使用することもできる。   The rubber composition uses synthetic rubber as a base material. Among these, acrylonitrile butadiene rubber (nitrile rubber, NBR), acrylic rubber, and fluorine rubber are preferable in consideration of heat resistance, oil resistance, grease resistance, and the like. Also, hydrogenated acrylonitrile butadiene rubber obtained by hydrogenating acrylonitrile butadiene rubber, acrylonitrile butadiene isoprene rubber obtained by copolymerization of isoprene, carboxylated acrylonitrile butadiene rubber introduced with carboxyl group in the molecule, carboxyl obtained by hydrogenating carboxylated acrylonitrile butadiene rubber. Various modified acrylonitrile butadiene rubbers such as hydrogenated acrylonitrile butadiene rubber can also be used. These acrylonitrile butadiene rubbers can be used in combination of two or more.

また、上記アクリロニトリルブタジエンゴムにおけるアクリロニトリルの含有量は特に制限されるものではなく、含有量が少ない順に低ニトリル、中ニトリル、中高ニトリル、高ニトリル、極高ニトリルに分類されるが、耐熱性や耐油性、耐摩耗性、耐クリープ性、リップ追従性等を考慮すると、中ニトリル、中高ニトリル、高ニトリルが好ましく、その場合のアクリロニトリル含有量は２０〜４０質量％である。より好適には、アクリロニトリル含有量は２５〜３６質量％であり、この範囲であればバランスの良い特性を示す。アクリロニトリル量が２０質量％未満であると、耐磨耗性が劣り、シールリップが磨耗しやすくなり、結果として軸受寿命を縮めることになる。また、アクリロニトリル量が４０質量％を超えると、永久圧縮ひずみ特性が劣り、シールリップの追従性が悪くなり、結果として軸受寿命を縮めることになる。   In addition, the content of acrylonitrile in the acrylonitrile butadiene rubber is not particularly limited, and is classified into low nitrile, medium nitrile, medium high nitrile, high nitrile, and extremely high nitrile in ascending order of content. Considering properties such as wear resistance, wear resistance, creep resistance, and lip followability, medium nitrile, medium high nitrile, and high nitrile are preferable, and the acrylonitrile content in that case is 20 to 40% by mass. More preferably, the acrylonitrile content is 25 to 36% by mass, and in this range, a well-balanced characteristic is exhibited. When the amount of acrylonitrile is less than 20% by mass, the wear resistance is inferior and the seal lip is easily worn, resulting in a shortened bearing life. On the other hand, when the amount of acrylonitrile exceeds 40% by mass, the permanent compression strain characteristics are inferior, the followability of the seal lip is deteriorated, and as a result, the bearing life is shortened.

上記合成ゴムには、可塑剤として、２５℃における粘度１０ｍＰａ・ｓ以上６００ｍＰａ・ｓ以下、好ましくは２０ｍＰａ・ｓ以上５００ｍＰａ・ｓ以下で、炭化水素鎖を有する化合物を配合する。この粘度が１０ｍＰａ・ｓ未満ではシール部材の表面にブルーミングし易くなり、６００ｍＰａ・ｓ超過では化合物同士の相互作用が大きくなり十分な耐寒性が得られなくなる。また、化合物の分子量は２００以上１５００以下であることが好ましく、２５０以上１０００以下がより好ましい。分子量が２００未満ではシール部材の表面にブルーミングし易くなり、１５００超過では化合物がゴム中を容易に移動することができず、十分な耐寒性が得られなくなる。また、化合物はエステル結合、エーテル結合、二重結合の少なくとも１つを持つことが好ましい。更には、十分な耐寒性を確保するために、化合物の凝固点は０℃以下が好ましく、−１０℃以下がより好ましい。凝固点が０℃を越える化合物は、寒冷地で使用したときにシール部材のゴム弾性が急激に低下する。   The synthetic rubber is blended with a compound having a hydrocarbon chain having a viscosity at 25 ° C. of 10 mPa · s to 600 mPa · s, preferably 20 mPa · s to 500 mPa · s as a plasticizer. If the viscosity is less than 10 mPa · s, blooming is likely to occur on the surface of the sealing member, and if it exceeds 600 mPa · s, the interaction between the compounds increases and sufficient cold resistance cannot be obtained. The molecular weight of the compound is preferably 200 or more and 1500 or less, and more preferably 250 or more and 1000 or less. If the molecular weight is less than 200, blooming tends to occur on the surface of the sealing member. If the molecular weight exceeds 1500, the compound cannot easily move in the rubber, and sufficient cold resistance cannot be obtained. The compound preferably has at least one of an ester bond, an ether bond and a double bond. Furthermore, in order to ensure sufficient cold resistance, the freezing point of the compound is preferably 0 ° C. or lower, more preferably −10 ° C. or lower. When the compound having a freezing point exceeding 0 ° C. is used in a cold region, the rubber elasticity of the seal member is drastically lowered.

使用する可塑剤は、上記の粘度や分子量、分子構造、凝固点を有するものであれば、その種類（化合物名や商品名）は問わず、制限無く使用できる。具体的には、グリセリン誘導体体、ポリエステルエーテル類やアジピン酸系ポリエステル等のポリエステル系可塑剤の中で上記の要件を満たすものを好適に使用できる。また、これら可塑剤は、２種以上を併用することもできる。可塑剤の配合量は、合成ゴム１００重量部に対し３重量部以上３０重量部以下である。配合量が３重量部未満では十分な可塑性が発現せず、３０重量部超過では滑りが生じて加工性が低下する。   As long as the plasticizer to be used has the above-mentioned viscosity, molecular weight, molecular structure, and freezing point, any kind (compound name or trade name) can be used without limitation. Specifically, those satisfying the above requirements can be suitably used among polyester plasticizers such as glycerin derivatives, polyester ethers and adipic acid polyesters. Moreover, these plasticizers can also use 2 or more types together. The compounding amount of the plasticizer is 3 to 30 parts by weight with respect to 100 parts by weight of the synthetic rubber. When the blending amount is less than 3 parts by weight, sufficient plasticity is not exhibited, and when it exceeds 30 parts by weight, slipping occurs and workability is lowered.

また、ゴム組成物には、適宜、補強剤、充填材、加硫系添加剤、老化防止剤、潤滑剤等の各種添加剤を添加することにより、シール部材の各種特性を高めることができる。   In addition, various properties of the seal member can be enhanced by appropriately adding various additives such as reinforcing agents, fillers, vulcanizing additives, anti-aging agents, and lubricants to the rubber composition.

補強剤として、カーボンブラックが好ましい。カーボンブラックの種類は、制限されるものではないが、例えばSAF(Super Abrasion Furnace Black)、ISAF(Intermediate Super Abrasion Furnace Black)、MAF(Medium Abrasion Furnace Black)、FEF(Fast Extruding Furnace black)、GPF(General Purpose Furnace black)、SRF(Simi-Reinforcing Furnace black)、FT(Fine Thermal Furnace black)、MT(Medium Thermal Furnace black)等を挙げることができる。中でも、補強性と成形加工性のバランスに優れたHAF、MAF、FEF、GPF及びSRFが好ましく、特にFEF、GPF及びSRFが好ましい。カーボンブラックの配合量は、合成ゴム１００重量部対し２０〜９０重量部である。配合量が２０重量部未満では十分な補強性が発現されず、９０重量部超過であると弾性材料の硬度が高くなり過ぎて伸びが少なくなり、本来有するゴム弾性が低下してしまう。   Carbon black is preferred as the reinforcing agent. The type of carbon black is not limited.For example, SAF (Super Abrasion Furnace Black), ISAF (Intermediate Super Abrasion Furnace Black), MAF (Medium Abrasion Furnace Black), FEF (Fast Extruding Furnace black), GPF ( Examples include General Purpose Furnace black), SRF (Simi-Reinforcing Furnace black), FT (Fine Thermal Furnace black), MT (Medium Thermal Furnace black), and the like. Among them, HAF, MAF, FEF, GPF and SRF, which are excellent in balance between reinforcement and molding processability, are preferable, and FEF, GPF and SRF are particularly preferable. The compounding amount of the carbon black is 20 to 90 parts by weight with respect to 100 parts by weight of the synthetic rubber. When the blending amount is less than 20 parts by weight, sufficient reinforcing property is not expressed, and when it is more than 90 parts by weight, the hardness of the elastic material becomes too high and the elongation is reduced, and the inherent rubber elasticity is lowered.

補強剤として、ケイ酸またはケイ酸塩も好ましい。好適なケイ酸としては、天然の石英粉末・珪石粉末（ＳｉＯ２）、合成無水ケイ酸（ＳｉＯ２）、合成含水ケイ酸（ＳｉＯ２・ｎＨ２Ｏ）等が挙げられる。好適なケイ酸塩としては、ケイ酸アルミニウム類ではカオリンクレー（Ａｌ２Ｏ３・２ＳｉＯ２・２Ｈ２Ｏ）、焼成クレー（Ａｌ２Ｏ３・２ＳｉＯ２）、ロウ石（Ａｌ２Ｏ３・４ＳｉＯ２・Ｈ２Ｏ）、セリサイト（Ｋ２Ｏ・３Ａｌ２Ｏ３・６ＳｉＯ２・２Ｈ２Ｏ）、マイカ（Ｋ２Ｏ・３Ａｌ２Ｏ３・６ＳｉＯ２・２Ｈ２Ｏ）、ネフェリンシナイト（Ｎａ２Ｏ・Ｋ２Ｏ・Ａｌ２Ｏ３・２ＳｉＯ２）、含水ケイ酸アルミニウム（Ａｌ２Ｏ３・ｍＳｉＯ２・ｎＨ２Ｏ）等を、ケイ酸マグネシウム類ではタルク（３ＭｇＯ・４ＳｉＯ２・Ｈ２Ｏ）等を、ケイ酸カルシウム類ではウォラストナイト（ＣａＯ・ＳｉＯ２）等をそれぞれ挙げることができる。中でも、耐磨耗性等を考慮すると、ケイ酸アルミニウム類が好ましい。これらのケイ酸、ケイ酸塩は単独でも、複数を混合して使用してもよく、合成ゴム１００重量部に対し２０〜１５０重量部配合される。配合量が２０重量部未満では十分な補強性が発現されず、１５０重量部超過であると弾性材料の硬度が高くなり過ぎて伸びが少なくなり、本来有するゴム弾性が低下してしまう。 Silica or silicate is also preferred as a reinforcing agent. Suitable silicic acid includes natural quartz powder / silica powder (SiO 2 ), synthetic silicic anhydride (SiO 2 ), synthetic hydrous silicic acid (SiO 2 .nH 2 O), and the like. Suitable silicates include kaolin clay (Al 2 O 3 · 2SiO 2 · 2H 2 O), calcined clay (Al 2 O 3 · 2SiO 2 ), wax (Al 2 O 3 · 4SiO) for aluminum silicates. 2 · H 2 O), sericite (K 2 O · 3Al 2 O 3 · 6SiO 2 · 2H 2 O), mica (K 2 O · 3Al 2 O 3 · 6SiO 2 · 2H 2 O), nepheline cinite ( Na 2 O · K 2 O · Al 2 O 3 · 2SiO 2), and the like hydrous aluminum silicate (Al 2 O 3 · mSiO 2 · nH 2 O), the magnesium silicates talc (3MgO · 4SiO 2 · H 2 O) and the like, and calcium silicates include wollastonite (CaO.SiO 2 ) and the like. Among these, aluminum silicates are preferable in consideration of wear resistance and the like. These silicic acids and silicates may be used alone or in combination as a mixture, and 20 to 150 parts by weight are blended with 100 parts by weight of the synthetic rubber. If the blending amount is less than 20 parts by weight, sufficient reinforcing property is not exhibited, and if it exceeds 150 parts by weight, the hardness of the elastic material becomes too high and the elongation is reduced, and the inherent rubber elasticity is lowered.

尚、カーボンブラックと、ケイ酸またはケイ酸塩とを併用する場合、合成ゴム１００重量部に対して、カーボンブラックを１０〜９０重量部、ケイ酸及びケイ酸塩の少なくとも１種を１００〜１１０重量部の範囲で、かつ合計で２０〜２００重量部となるように配合することが好ましい。より好ましくは、合成ゴム１００重量部に対して、カーボンブラックを２０〜８０重量部、ケイ酸及びケイ酸塩の少なくとも１種を２０〜１００重量部、合計で６０〜１２０重量部となるように配合する。単独または合計での前記下限値を下回ると十分な補強効果が発現せず、前記上限値を上回ると硬度が高くなり過ぎて伸びが低くなり、本来有するゴム弾性が低下する。   When carbon black and silicic acid or silicate are used in combination, 10 to 90 parts by weight of carbon black and 100 to 110 of at least one of silicic acid and silicate with respect to 100 parts by weight of synthetic rubber. It is preferable to mix in a range of parts by weight and 20 to 200 parts by weight in total. More preferably, with respect to 100 parts by weight of the synthetic rubber, 20 to 80 parts by weight of carbon black and 20 to 100 parts by weight of at least one of silicic acid and silicate are 60 to 120 parts by weight in total. Blend. If the lower limit value alone or in total is not reached, a sufficient reinforcing effect is not exhibited. If the upper limit value is exceeded, the hardness becomes too high and the elongation becomes low, and the inherent rubber elasticity decreases.

加硫剤としては、粉末硫黄、硫黄華、沈降硫黄、高分散性硫黄等の各種硫黄、モルホリンジスルフィド、アルキルフェノールジスルフィド、Ｎ，Ｎ−ジチオ−ビス（ヘキサヒドロ−２Ｈ−アゼピノン−２）、チウラムポリスルフィド等の硫黄を排出可能な硫黄化合物、ジクミルパーオキサイド、ジ（ｔ−ブチルパーオキシ）ジイソプロピルベンゼン、２，５−ジメチルヘキサン、ベンゾイルパーオキサイド等の過酸化物等が挙げられる。中でも、分散性や取り扱いの容易さ、耐熱性の点で、高分散性硫黄やモルホリンジスルフィドを使用することが好ましい。   Examples of the vulcanizing agent include powdered sulfur, sulfur white, precipitated sulfur, highly dispersible sulfur, morpholine disulfide, alkylphenol disulfide, N, N-dithio-bis (hexahydro-2H-azepinone-2), thiuram polysulfide, etc. And sulfur compounds capable of discharging sulfur, peroxides such as dicumyl peroxide, di (t-butylperoxy) diisopropylbenzene, 2,5-dimethylhexane, benzoyl peroxide, and the like. Among them, it is preferable to use highly dispersible sulfur or morpholine disulfide in terms of dispersibility, ease of handling, and heat resistance.

尚、硫黄系の加硫剤を用いる場合は、グアニジン系化合物、アルデヒド−アンモニア系化合物、チアゾール系化合物、チオウレア系化合物、スルフェンアミド系化合物、チウラム系化合物、ジチオカルバメート系化合物、キサンテート系化合物等を加硫助剤として併用する必要がある。硫黄系の加硫剤の中でも高分散性硫黄を用いる場合には、チウラム系のテトラメチルチウラムジスルフィド等またはスルフェンアミド系のＮ−シクロベンジル−２−ベンゾチアジル・スルフェンアミド等と、チアゾール系の２−メルカプトベンゾチアゾール等とを併用することが好ましい。   When using a sulfur-based vulcanizing agent, a guanidine compound, an aldehyde-ammonia compound, a thiazole compound, a thiourea compound, a sulfenamide compound, a thiuram compound, a dithiocarbamate compound, a xanthate compound, etc. Must be used together as a vulcanization aid. When using highly dispersible sulfur among sulfur-based vulcanizing agents, thiuram-based tetramethylthiuram disulfide or the like or sulfenamide-based N-cyclobenzyl-2-benzothiazyl sulfenamide and the like and thiazole-based vulcanizing agents It is preferable to use 2-mercaptobenzothiazole together.

また、カルボキシル化アクリロニトルブタジエンゴムを用いる場合は、酸化亜鉛を用いると早期加硫を生じ易いため、過酸化亜鉛とステアリン酸とを併用することが好ましい。過酸化亜鉛は、ゴム組成物の混練り加工時の温度ではそのまま組成物中に存在し、加硫成形時に酸化亜鉛を生じるため、混練り加工時及び保管時に早期加硫を生じることがない。   Moreover, when using carboxylated acrylonitrile butadiene rubber, it is preferable to use zinc peroxide and stearic acid together because zinc oxide tends to cause early vulcanization. Zinc peroxide is present in the composition as it is at the temperature at which the rubber composition is kneaded and produces zinc oxide at the time of vulcanization molding, so that early vulcanization does not occur at the time of kneading and storage.

加硫促進助剤としては、酸化亜鉛等の金属酸化物、金属炭酸塩、金属水酸化物、ステアリン酸等の有機酸とその誘導体、及びアミン類等が挙げられる。これら加硫助剤、活性剤は２種以上を混合使用してもよく、合成ゴム１００重量部に対して０．１〜１０重量配合される。   Examples of the vulcanization acceleration aid include metal oxides such as zinc oxide, metal carbonates, metal hydroxides, organic acids such as stearic acid and derivatives thereof, and amines. Two or more of these vulcanization aids and activators may be mixed and used, and blended in an amount of 0.1 to 10 weights with respect to 100 parts by weight of the synthetic rubber.

老化防止剤としては、アミン・ケトン縮合生成物、芳香族第二級アミン類、モノフェノール誘導体、ビス又はポリフェノール誘導体、ヒドロキノン誘導体、硫黄系老化防止剤、リン系老化防止剤等が挙げられる。このうち、アミン・ケトン縮合生成物系の２，２，４−トリメチル−１，２−ジヒドロキノリン重合体・ジフェニルアミンとアセトンとの縮合反応物、芳香族第二級アミン系のＮ，Ｎ’−ジ−β−ナフチル−ｐ−フェニレンジアミン、４，４’−ビス−（α，α−ジメチルベンジル）ジフェニルアミン、Ｎ−フェニル−Ｎ’−（３−メタクリロイルオキシ−２−ヒドロキシプロピル）−ｐ−フェニレンジアミン等を好適に挙げることができる。   Examples of the antioxidant include amine / ketone condensation products, aromatic secondary amines, monophenol derivatives, bis or polyphenol derivatives, hydroquinone derivatives, sulfur-based antioxidants and phosphorus-based antioxidants. Of these, amine-ketone condensation product-based 2,2,4-trimethyl-1,2-dihydroquinoline polymer-condensation reaction product of diphenylamine and acetone, aromatic secondary amine-based N, N'- Di-β-naphthyl-p-phenylenediamine, 4,4′-bis- (α, α-dimethylbenzyl) diphenylamine, N-phenyl-N ′-(3-methacryloyloxy-2-hydroxypropyl) -p-phenylene A diamine etc. can be mentioned suitably.

また、熱分解を防止して耐熱性を向上するため、上記の老化防止剤とともに２次老化防止剤を併用することがより好ましい。２次老化防止剤としては、例えば、硫黄系の２−メルカプトベンズイミダゾール、２−メルカプトメチルベンズイミダゾール及びこれらの亜鉛塩等を例示できる。更に、日光あるいはオゾンの作用による亀裂を抑制させる日光亀裂防止剤として、融点が５５〜７０℃程度のワックス類を合成ゴム１００重量部に対して０．５〜２重量部程度添加してもよい。   In order to prevent thermal decomposition and improve heat resistance, it is more preferable to use a secondary anti-aging agent together with the anti-aging agent. Examples of the secondary antiaging agent include sulfur-based 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole, and zinc salts thereof. Further, wax having a melting point of about 55 to 70 ° C. may be added as an amount of about 0.5 to 2 parts by weight with respect to 100 parts by weight of the synthetic rubber as a sun crack prevention agent that suppresses cracking due to the action of sunlight or ozone. .

潤滑剤としては、融点が４０〜１４０℃のワックス（低融点油脂）が挙げられる。具体的には、上記融点範囲にあるパラフィンワックスやマイクロクリスタリンワックスに代表される石油ワックス、ポリエチレンワックス、モンタンワックス、カルナヴァワックス、エステル系ワックス、ステアロアミド、オキシステアロアミド、エルシンアミド、ラウリルアミド、パルミチルアミド、ベヘンアミド、メチロールアミド、エチレンビスオレイルアミド、ステアリルオレイルアミド等が挙げられる。中でも、パラフィンやポリエチレンワックスが好ましい。   Examples of the lubricant include waxes having a melting point of 40 to 140 ° C. (low melting point fats and oils). Specifically, petroleum wax, polyethylene wax, montan wax, carnauba wax, ester wax, stearamide, oxystearamide, erucinamide, laurylamide represented by paraffin wax and microcrystalline wax in the above melting point range, Examples include palmitylamide, behenamide, methylolamide, ethylenebisoleylamide, stearyloleylamide, and the like. Of these, paraffin and polyethylene wax are preferred.

潤滑剤として、その他にも鉱油、エーテル系オイル、シリコーン系オイル、ポリα−オレフィンオイル、フッ素オイル等を挙げることができる。中でも、シリコーン系オイルが好ましい。シリコーン系オイルはポリジメチルシロキサンを主成分とする常温で液体の物質であるが、水素添加アクリロニトリルブタジエンゴムを使用する場合、相溶性を高めるためにポリジメチルシロキサンのメチル基の一部または分子末端がアミノ基、アルキル基、エポキシ基、ポリエーテル基、高級脂肪酸エステル等で置換された変性タイプでもよい。このような官能基を有することにより、官能基がアクリロニトリルブタジエンゴムの主鎖に反応もしくは吸着して弾性部材の表面に一度にブルームすることを防止すると同時に、徐々に恒久的にブルームしてその効果を長期にわたり維持する。   Other examples of the lubricant include mineral oil, ether oil, silicone oil, poly α-olefin oil, and fluorine oil. Among these, silicone oil is preferable. Silicone-based oils are substances that are liquid at room temperature with polydimethylsiloxane as the main component. However, when hydrogenated acrylonitrile butadiene rubber is used, some of the methyl groups or molecular ends of the polydimethylsiloxane are used to improve compatibility. A modified type substituted with an amino group, an alkyl group, an epoxy group, a polyether group, a higher fatty acid ester, or the like may be used. By having such a functional group, it prevents the functional group from reacting or adsorbing to the main chain of acrylonitrile butadiene rubber to bloom on the surface of the elastic member at the same time, and at the same time, gradually and permanently blooms its effect. For a long time.

更に、添加剤として、何れも公知のカップリング剤や顔料、染料、離型剤等を添加することもできる。   Furthermore, any known coupling agents, pigments, dyes, mold release agents, and the like can be added as additives.

物性面に言及すると、ゴム組成物の硬度は、上記に挙げた各種充填剤の添加量等によって影響を受けるが、シール部材としての密封性及び追従性から、ＪＩＳＫ６３０１に記載のスプリング硬さＡスケールで、５０〜９０の範囲が好ましい。前記硬さが５０未満の場合には、シール部材の摩擦抵抗が大きくなるとともに耐摩耗性が低下する。また、前記硬さが９０を超えると、前述のようにゴム弾性が低下するので、シール部材のリップ部の密封性、追従性が低下し、塵埃が多い環境や泥水に曝される状況において使用すると、転がり軸受の寿命が低下するおそれがある。   In terms of physical properties, the hardness of the rubber composition is affected by the addition amount of the various fillers listed above, but the spring hardness A scale described in JISK6301 is used due to the sealing property and followability as a sealing member. And the range of 50-90 is preferable. If the hardness is less than 50, the frictional resistance of the seal member increases and the wear resistance decreases. Further, if the hardness exceeds 90, the rubber elasticity is lowered as described above, so that the sealing performance and followability of the lip portion of the sealing member are lowered, and used in a dusty environment or a situation where it is exposed to muddy water. Then, the life of the rolling bearing may be reduced.

ゴム組成物を得るための方法は特に限定されないが、合成ゴムと、可塑剤及び各種添加剤とを、ゴム混練ロール、加圧ニーダー、バンバリーミキサー等の従来から公知のゴム用混練り装置を用いて均一に混練りすることが可能である。混練り条件は特に限定されないが、通常は３０〜８０℃の温度で、５〜６０分間混練りすることによって、各種添加剤の十分な分散を図ることができる。   The method for obtaining the rubber composition is not particularly limited, but a conventionally known rubber kneading apparatus such as a rubber kneading roll, a pressure kneader, a Banbury mixer, etc. is used for the synthetic rubber, the plasticizer, and various additives. And can be kneaded uniformly. Although the kneading conditions are not particularly limited, sufficient dispersion of various additives can be achieved by kneading usually at a temperature of 30 to 80 ° C. for 5 to 60 minutes.

また、上記ゴム組成物をシール部材とするための方法も特に限定されないが、未加硫のゴム組成物を金型の中で加圧しながら加熱すれば良く、圧縮成形、トランスファー成形、射出成形等の公知のゴム成形方法により製造することができる。例えば、圧縮成形の場合、金型の中に予め接着剤を塗布した芯金（図２においては、オイルシール１３０の外周部１３１）を挿入し、先に述べた方法で製造した未加硫のゴム組成物のシートを乗せ、通常１２０〜２００℃で３０秒〜３０分程度加圧加硫することで製造することができる。また、必要に応じて、１２０〜２００℃で１０分〜１０時間程度後架橋してもよい。   Further, the method for using the rubber composition as a sealing member is not particularly limited, but the unvulcanized rubber composition may be heated while being pressed in a mold, such as compression molding, transfer molding, injection molding, etc. It can manufacture by the well-known rubber molding method. For example, in the case of compression molding, a core bar (in FIG. 2, the outer peripheral portion 131 of the oil seal 130) previously coated with an adhesive is inserted into a mold, and an unvulcanized product manufactured by the above-described method is used. It can be produced by placing a rubber composition sheet and vulcanizing under pressure at 120 to 200 ° C. for about 30 seconds to 30 minutes. Moreover, you may post-crosslink at 120-200 degreeC for about 10 minutes-10 hours as needed.

以下に実施例及び比較例を挙げて本発明を更に説明するが、本発明はこれにより何ら制限されるものではない。   Hereinafter, the present invention will be further described with reference to examples and comparative examples, but the present invention is not limited thereto.

（実施例１〜３、比較例１〜２）
表１に示す合成ゴム、可塑剤及び各種添加剤を混練ロールに投入して、十分に混連してゴム組成物を調製した。そして、金型中に、予め接着剤を塗布したＳＰＣＣ製の芯金を配置し、芯金の外側に調製したゴム組成物からなる未加硫のシートを載せ、１２０〜２００℃で３０秒〜３０分程度加圧加硫することで試験軸受（日本精工（株）製単列深溝玉軸受「６２０３（呼び番号）」）用の接触型シールを作製した。 (Examples 1-3, Comparative Examples 1-2)
Synthetic rubber, plasticizer and various additives shown in Table 1 were put into a kneading roll and mixed sufficiently to prepare a rubber composition. And, a core made of SPCC coated with an adhesive in advance is placed in the mold, and an unvulcanized sheet made of the rubber composition prepared on the outside of the core is placed on the mold at 120 to 200 ° C. for 30 seconds to A contact seal for a test bearing (single row deep groove ball bearing “6203 (nominal number)” manufactured by NSK Ltd.) was produced by pressure vulcanization for about 30 minutes.

Figure 2006300131
Figure 2006300131

尚、使用した可塑剤の物性は以下の通りである。   In addition, the physical property of the used plasticizer is as follows.

Figure 2006300131
Figure 2006300131

作製した接触型シールを試験軸受に組み込み、日本精工（株）製の軸受回転試験機に装着して下記条件にて所定時間回転させた後、封入グリース中の水分量を測定してシール性能を評価した。結果を、実施例２を１とする相対値で表２に示す。
・回転数 ：１０００ｒｐｍ
・回転時間 ：１０００時間
・封入グリース：エーテル系グリース
・雰囲気温度 ：−５℃
・水１リットルに２００ｇの塩化カルシウムを溶解した溶液を連続噴霧 The prepared contact type seal is incorporated into a test bearing, mounted on a bearing rotation tester manufactured by NSK Ltd., rotated for a specified time under the following conditions, and then the moisture content in the sealed grease is measured to determine the sealing performance. evaluated. The results are shown in Table 2 as relative values with Example 2 as 1.
・ Rotation speed: 1000rpm
・ Rotation time: 1000 hours ・ Encapsulated grease: Ether grease ・ Ambient temperature: -5 ℃
・ Continuous spraying of 200 g calcium chloride dissolved in 1 liter of water

また、接触型シールを１００℃の恒温槽に入れ、シール表面へのブルーミングの有無を目視で確認した。更に、上記６２０３用接触型シールを１０００枚作製したときのシール完成品の最終的な不良品率から加工性を評価した。結果を表２に併記する。何れも、コストアップ要因となる不良率ではなかった。   Moreover, the contact-type seal | sticker was put into a 100 degreeC thermostat, and the presence or absence of blooming to the seal | sticker surface was confirmed visually. Furthermore, the workability was evaluated from the final defective product rate of the finished seal product when 1000 contact type seals for 6203 were produced. The results are also shown in Table 2. None of these were defective rates that caused cost increases.

Figure 2006300131
Figure 2006300131

表２から、本発明に従う可塑剤を配合したゴム組成物からなるシールは加工性に優れることに加え、耐寒性にも優れることがわかる。   From Table 2, it can be seen that a seal made of a rubber composition containing a plasticizer according to the present invention is excellent in cold resistance in addition to excellent processability.

軸受装置の一例を示す断面図である。It is sectional drawing which shows an example of a bearing apparatus. 図１に示した軸受装置のオイルシール付近を示す要部断面図である。It is principal part sectional drawing which shows the oil seal vicinity of the bearing apparatus shown in FIG.

符号の説明Explanation of symbols

１０ 鉄道車両用軸受装置（軸受装置）
１１ シール部材
１２ 開口
１３ オイルシール
１４ 外側リップ
１２１ 油切り
１２２ シールカバー
１３３ 内側リップ
１３５ ガータスプリング 10 Railway vehicle bearing device (bearing device)
DESCRIPTION OF SYMBOLS 11 Seal member 12 Opening 13 Oil seal 14 Outer lip 121 Oil drain 122 Seal cover 133 Inner lip 135 Garter spring

Claims (1)

内輪の両端に当接する油切りと、該油切りの外周面と摺接するリップを有し、外輪の両端部に固定されるオイルシール手段とを備えた鉄道車両用軸受装置において、
オイルシール手段のリップが、可塑剤として、２５℃における粘度１０ｍＰａ・ｓ以上６００ｍＰａ・ｓ以下で、炭化水素鎖を有する化合物を含有するゴム組成物からなることを特徴とする鉄道車両用軸受装置。 In a railway vehicle bearing device comprising: an oil drain that abuts on both ends of the inner ring; and an oil seal means that has a lip that is in sliding contact with the outer peripheral surface of the oil drain and is fixed to both ends of the outer ring.
A railcar bearing device, wherein the lip of the oil seal means is made of a rubber composition containing a compound having a viscosity of 10 mPa · s to 600 mPa · s at 25 ° C. as a plasticizer and having a hydrocarbon chain.
JP2005119612A 2005-04-18 2005-04-18 Bearing device for rolling stock Pending JP2006300131A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011112184A (en) * 2009-11-27 2011-06-09 Nsk Ltd Bearing device
JP2011185341A (en) * 2010-03-08 2011-09-22 Jtekt Corp Rolling bearing device for wheel
CN102425204A (en) * 2011-08-31 2012-04-25 太原重工股份有限公司 Rotary vertical shaft sealing device of forward excavator
KR20150091066A (en) * 2012-12-04 2015-08-07 란세스 도이치란트 게엠베하 Rubber mixtures containing short-chain alkyl esters of glycerin
JP2017518418A (en) * 2014-06-03 2017-07-06 ランクセス・ドイチュランド・ゲーエムベーハー Diphenylguanidine-free rubber mixture containing short-chain alkyl esters of glycerol

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011112184A (en) * 2009-11-27 2011-06-09 Nsk Ltd Bearing device
JP2011185341A (en) * 2010-03-08 2011-09-22 Jtekt Corp Rolling bearing device for wheel
CN102425204A (en) * 2011-08-31 2012-04-25 太原重工股份有限公司 Rotary vertical shaft sealing device of forward excavator
KR20150091066A (en) * 2012-12-04 2015-08-07 란세스 도이치란트 게엠베하 Rubber mixtures containing short-chain alkyl esters of glycerin
JP2016505667A (en) * 2012-12-04 2016-02-25 ランクセス・ドイチュランド・ゲーエムベーハー Rubber mixtures containing short-chain alkyl esters of glycerol
KR102263531B1 (en) * 2012-12-04 2021-06-09 란세스 도이치란트 게엠베하 Rubber mixtures containing short-chain alkyl esters of glycerin
JP2017518418A (en) * 2014-06-03 2017-07-06 ランクセス・ドイチュランド・ゲーエムベーハー Diphenylguanidine-free rubber mixture containing short-chain alkyl esters of glycerol
US10150853B2 (en) 2014-06-03 2018-12-11 Lanxess Deutschland Gmbh Diphenylguanidine-free rubber mixtures containing short-chain alkyl esters of glycerin

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