Vacuum pump

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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Details

F04D 19/04 (2006.01) F16C 25/06 (2006.01) F16C 27/04 (2006.01)

Patent

CA 2675682

A pump insert (50) for supporting a rotor (14) of a pump comprises an annular resilient support (52) for engaging the body (26) of the pump, the support (52) extending about a rolling bearing (10) having an inner race (12) for engaging the rotor (14), an axially preloaded outer race (16) fixed to the support (52), and a plurality of rolling elements (18) located between the races. During assembly, the rolling bearing (10) can be accurately positioned within the support (52) so that there is a very low tolerance stack-up when the insert (50) is fitted to the rotor (14). Consequently, the position of the rotor (14) will hardly change, if at all, when the rolling bearing (10) is replaced during servicing of the pump.

La présente invention concerne un insert (50) de pompe servant à soutenir un rotor (14) d'une pompe qui comprend un support annulaire élastique (52) destiné à entrer en contact avec le corps (26) de la pompe, le support (52) s'étendant autour d'un palier (10) à roulement ayant une piste interne (12) pour enter en contact avec le rotor (14), une piste externe (16) préchargée de façon axiale fixée sur le support (52), et une pluralité d'éléments roulants (18) située entre les pistes. Lors de l'assemblage, le palier (10) à roulement peut être précisément positionné à l'intérieur du support (52) de telle sorte qu'il existe un empilage de très faible tolérance lorsque l'insert (50) est fixé sur le rotor (14). Par conséquent, la position du rotor (14) changera à peine, si tant est que le palier (10) à roulement est remplacé lors de la mise en service de la pompe.

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