Oil-sealed vane-type rotary vacuum pump with oil feed
US6019585A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Jan 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2220/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns an oil-sealed vane-type rotary vacuum pump with a suction chamber (8) housing a rotatably mounted rotor (3) which has an anchoring section (21) and a bearing section (23) with a slot (24) in which two vanes (26) are mounted with a space (28) between them. The rotor bearing (3) comprises the bearing section (23) and a rotor-mounting bore (11). The vacuum pump also has an oil pump (45, 46), which produces a flow of oil through the space (28) between the vanes, and a system for controlling the flow of oil through the space (28), the oil passing through a channel (66) opening out in the rotor-mounting bore (11) and then through radial and longitudinal bores (68, 69) in the bearing section (23) of the rotor. In order to reduce the noise produced by the pump when in operation, the invention proposes that the location where the oil channel (66) opens out into the rotor-mounting bore (11) and the location of the radial bore (68) in the bearing section (23) of the rotor, with respect to the location of the vanes (26) or the vane-mounting slot (24), are such that oil can only flow into the space (28) between the vanes when the volume of the space is increasing, and tha…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.