JP2001027255A5

JP2001027255A5 -

Info

Publication number: JP2001027255A5
Application number: JP1999200297A
Authority: JP
Filing date: 1999-07-14
Publication date: 2005-09-15

Description

一方、回転機械装置を、ハウジング及び回転軸のうちの少なくとも一方が、互いに別体である複数の部材を軸方向に亙り互いに直列に配置して成るものとした場合には、製造上不可避な組み付け誤差や加工上の誤差等に基づき、これら複数の部材の中心軸同士が互いに偏心した状態になり易い。この様に偏心した状態では、転がり軸受を構成する外輪とハウジングとの間に加わるラジアル荷重が、円周方向の一部で大きくなり、上記外輪がハウジングに対して転がり接触状態となる。この為、上記クリープを生じ易くなる。従って、この様な回転機械装置には、特に、クリープを有効に防止する装置を設ける必要がある。
本発明の転がり軸受のクリープ防止装置付回転機械装置は、上述の様な事情に鑑みて発明したものである。 On the other hand, in the case where the rotating machinery, least also one of the housing and the rotating shaft was assumed formed by arranged in series with one another over a plurality of members are separate from each other in the axial direction, producing unavoidable The central axes of these plurality of members tend to be eccentric to each other based on various assembly errors and machining errors. In such an eccentric state, the radial load applied between the outer ring constituting the rolling bearing and the housing becomes large in a part in the circumferential direction, and the outer ring is in a rolling contact state with the housing. Therefore, the above creep is likely to occur. Therefore, such a rotary mechanical device needs to be provided with a device for effectively preventing creep.
The rotary mechanical device with a creep prevention device for rolling bearings of the present invention was invented in view of the above circumstances.

特に、本発明の回転機械装置の場合、上記ハウジングと外輪とが互いに熱膨張係数が異なる材料から成り、しかも、上記ハウジングと軸とのうちの少なくとも一方が、互いに別体である複数の部材を互いに軸方向に亙り直列に配置して成る。この様な回転機械装置に組み込む転がり軸受は、特にクリープを生じ易いが、本発明の場合には、クリープ防止装置をこの様な回転機械装置に設ける事で、有害なクリープの発生を有効に防止できる。 Particularly in the case of rotating machinery of the present invention consists the housing and the thermal expansion coefficient of different materials and the outer ring, moreover, least also one of the said housing and the shaft, a plurality of a separate members The members are arranged in series along the axial direction of each other. Rolling bearings incorporated into such a rotary mechanical device are particularly prone to creep, but in the case of the present invention, by providing a creep prevention device in such a rotary mechanical device, the occurrence of harmful creep is effectively prevented. it can.

次に、図４は、本発明の実施の形態の第２例を示している。本例の場合には、回転軸２だけでなく、ハウジング１ａも、互いに別体である部材を、軸方向に亙り互いに直列に配置して成る。即ち、ハウジング１ａは、互いに別体である、第一のハウジング部材２３と、第二のハウジング部材２４とから成り、これら第一、第二のハウジング部材２３、２４は、軸方向に亙り互いに離隔した状態で配置している。従って、本例の場合には、これら第一、第二のハウジング部材２３、２４の中心軸同士の間での偏心を生じ易く、上述した第１例の場合よりも、更に上記ハウジング１ａと回転軸２との間に設ける各玉軸受３、３はクリープを生じ易い。従って、本例の場合には、この様にクリープを生じ易い回転機械装置にクリープ防止装置を設ける事で、有害なクリープの発生を防止する事の効果を、より有効に得られる。
その他の構成及び作用に就いては、上述した第１例の場合と同様である為、同等部分には同一符号を付して重複する図示並びに説明を省略する。
Next, FIG. 4 shows a second example of the embodiment of the present invention. In the case of this example, not only the rotating shaft 2 but also the housing 1a is formed by arranging members that are separate from each other in series with each other over the axial direction. That is, the housing 1a is composed of a first housing member 23 and a second housing member 24, which are separate bodies from each other, and the first and second housing members 23 and 24 are separated from each other in the axial direction. It is arranged in the state that it was done. Therefore, in the case of this example, eccentricity is likely to occur between the central axes of the first and second housing members 23 and 24, and the rotation with the housing 1a is further higher than in the case of the first example described above. The ball bearings 3 and 3 provided between the shaft 2 and the ball bearings 3 and 3 are prone to creep. Therefore, in the case of this example, by providing the creep prevention device in the rotating mechanical device in which creep is likely to occur, the effect of preventing the occurrence of harmful creep can be obtained more effectively.
Since the other configurations and operations are the same as in the case of the first example described above, the same reference numerals are given to the equivalent portions, and duplicate illustrations and explanations will be omitted.

Claims

Between an outer ring fitted in a housing and having an outer ring track on the inner peripheral surface, an inner ring fitted on a shaft arranged inside the housing and having an inner ring track on the outer peripheral surface, and the inner ring track and the outer ring track. It is equipped with a plurality of rolling elements that are freely rollable in the housing.
The housing and outer ring are made of materials with different coefficients of thermal expansion.
Least also one of the said housing and the shaft, which formed by arranging in series over a plurality of members are separate from each other in the axial direction,
A concave groove formed on a part of the outer peripheral surface of the outer ring over the entire circumference, and an elastic groove that is mounted in the concave groove and extends in the radial direction between the bottom surface of the concave groove and the inner peripheral surface of the housing. A rotating mechanical device with a creep prevention device for rolling bearings that constitutes a creep prevention device with an O-ring compressed into.