JP2010001971A5

JP2010001971A5 -

Info

Publication number: JP2010001971A5
Application number: JP2008161600A
Authority: JP
Filing date: 2008-06-20
Publication date: 2011-04-28
Anticipated expiration: 2028-06-20

Description

上記目的を達成するために、本発明は下記の高速回転用転がり軸受を提供する。
（１）高速回転する主軸を支承し、合成樹脂製保持器を備える高速回転用転がり軸受において、前記合成樹脂製保持器が、引張強度が２ＧＰａ以上で、かつ引張弾性率が５０ＧＰａ以上で、かつ、パラ系アラミド繊維、ポリアリレート繊維及びポリパラフェニレンベンズビスオキサゾール繊維から選ばれる少なくとも１種の有機繊維からなる織物と、熱硬化性樹脂とを一体化した有機繊維強化プラスチックからなることを特徴とする高速回転用転がり軸受。
（２）前記熱硬化性樹脂が、エポキシ樹脂、ビスマレイミド樹脂、ポリアミノアミド樹脂及びフェノール樹脂から選ばれる少なくとも１種であることを特徴とする上記（１）記載の高速回転用転がり軸受。
（３）前記合成樹脂製保持器が外輪に案内されることを特徴とする上記（１）または（２）記載の高速回転用転がり軸受。 In order to achieve the above object, the present invention provides the following rolling bearing for high-speed rotation.
(1) In a rolling bearing for high-speed rotation that supports a spindle that rotates at a high speed and includes a synthetic resin cage, the synthetic resin cage has a tensile strength of 2 GPa or more and a tensile modulus of 50 GPa or more , and Characterized by comprising an organic fiber reinforced plastic in which a woven fabric made of at least one organic fiber selected from para-aramid fiber, polyarylate fiber and polyparaphenylene benzbisoxazole fiber and a thermosetting resin are integrated. Rolling bearing for high speed rotation.
(2) The high-speed rolling bearing according to (1), wherein the thermosetting resin is at least one selected from an epoxy resin, a bismaleimide resin, a polyaminoamide resin, and a phenol resin .
(3) The high-speed rolling bearing according to (1) or (2), wherein the synthetic resin cage is guided by an outer ring .

有機繊維としてパラ系アラミド繊維、ポリアリレート繊維、ポリパラフェニレンベンズビスオキサゾール（ＰＢＯ）繊維を用いる。これらは単独で使用してもよいし、複数種を組み合わせて使用してもよい。これに対し、超高分子量ポリエチレン繊維は、融点が１４０℃程度であるため単独での使用には向かない。また、ＰＡＮ系炭素繊維は引張強度が高く（２．０〜７．１ＧＰａ）好ましいが、案内面への傷付性があるため、案内面に熱処理等の硬化処理を施す必要があり、コスト増を招く。パラ系アラミド繊維、ポリアリレート繊維及びポリパラフェニレンベンズビスオキサゾール繊維は、高強度でありながらも柔軟性を有し、案内面への傷付性がなく案内面の熱硬化処理も不要であり、摺動特性にも優れることなどから、好ましい。下記表１に、これら３種の有機繊維の引張強度及び引張弾性率を示すが、ＰＡＮ系炭素繊維の引張強度に近いＰＢＯ繊維が最も好適である。尚、参考のために、炭素繊維及び超高分子量ポリエチレン繊維の引張強度及び引張弾性率を併せて示す。 Para-aramid fibers as the organic fibers, polyarylate fibers, polyparaphenylene benzobisoxazole the (PBO) textiles used. These may be used alone or in combination of two or more. On the other hand , ultrahigh molecular weight polyethylene fibers have a melting point of about 140 ° C. and are not suitable for use alone. PAN-based carbon fibers have high tensile strength (2.0 to 7.1 GPa) and are preferable. Invite . Parametric-aramid fiber, polyarylate fiber and polyparaphenylene benzimidazole bis oxa Eaux Le textiles, while a high strength has a flexibility, the thermal curing treatment of the wound with resistance without guide surface to the guide surface This is preferable because it is unnecessary and has excellent sliding characteristics. Table 1 below shows the tensile strength and tensile modulus of these three types of organic fibers. PBO fibers that are close to the tensile strength of PAN-based carbon fibers are most suitable. For reference, the tensile strength and tensile modulus of carbon fiber and ultrahigh molecular weight polyethylene fiber are also shown.

Claims

In rolling bearings for high-speed rotations that support spindles that rotate at high speeds and that are equipped with a synthetic resin cage,
The synthetic resin cage has a tensile strength of 2 GPa or more, a tensile modulus of 50 GPa or more, and at least one organic material selected from para-aramid fibers, polyarylate fibers, and polyparaphenylenebenzbisoxazole fibers. A rolling bearing for high-speed rotation characterized by comprising an organic fiber reinforced plastic in which a woven fabric made of fibers and a thermosetting resin are integrated.

The rolling bearing for high-speed rotation according to claim 1, wherein the thermosetting resin is at least one selected from an epoxy resin, a bismaleimide resin, a polyaminoamide resin, and a phenol resin .

The rolling bearing for high-speed rotation according to claim 1 or 2, wherein the synthetic resin cage is guided by an outer ring .