Oil-sealed vane-type rotary vacuum pump with an oil pump

Details Oil-sealed vane-type rotary vacuum pump with an oil pump Oil-sealed vane-type rotary vacuum pump with an oil pump

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 29/02 (2006.01)

Patent

CA 2227191

The invention concerns an oil-sealed vane-type rotary vacuum pump (1) with a rotor (3) and an oil pump (45, 46) whose suction chamber is fitted with feeds (64, 65) for gas and oil. In order to simplify the supply of a gas/oil mixture to the vacuum pump, the invention proposes that the gas and oil feeds (64, 65) are disposed in such a way that initially only oil and subsequently both oil and air are aspirated into the volume swept by the oil pump (45, 46) as it rotates.

L'invention concerne une pompe à vide à palettes (1) rendue étanche à l'huile, qui comprend un rotor (3) et une pompe à huile (45, 46) dont la chambre d'aspiration est munie de conduites d'amenée (64, 65) pour le gaz et l'huile. Afin de simplifier l'alimentation de la pompe à vide en mélange gaz/huile, il est prévu que les conduites d'amenée (64, 65) du gaz et de l'huile soient choisies de manière à ce que dans le volume aspiré en circulation de la pompe à huile (45, 46), il ne soit aspiré d'abord que de l'huile, puis aussi bien de l'huile que de l'air.

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