Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Radial groove
Patent
1978-03-14
1980-11-04
Smith, Leonard E.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Radial groove
418 81, 418 82, 418 94, F04C 2902
Patent
active
042317282
ABSTRACT:
An improved design for sealing and lubricating the moving parts of a rotary vane pump. An effectively operating lubricant distributing system is obtained in such a pump by forming radially extending passages through the pump drive shaft and attached rotor which connect the lubricant carrying hollow portion of the drive shaft with chambers located between the base of the vanes and the slits formed in the rotor in which the vanes radially slide. The rear bearing in which the drive shaft rotates is connected to these vane base chambers by means of an annular compartment having a lubricant duct connected thereto, thereby insuring the continuous flow of lubricant from the hollow portion of the drive shaft, through the vane base chambers and into the rear bearing. In an alternative embodiment of the present invention, the front bearing of the pump is connected with the hollow portion of the drive shaft via a lubricant passage formed on the suction side of the vanes. In addition, various designs of the above-mentioned front and rear bearing lubricant supply arrangements are also disclosed.
REFERENCES:
patent: 2324903 (1943-07-01), Beckman
patent: 2387761 (1945-10-01), Kendrick
patent: 2801791 (1957-08-01), Walter
patent: 2965040 (1960-12-01), Eisenberg
patent: 3289651 (1966-12-01), Jinno
patent: 3419208 (1968-12-01), Brewer et al.
patent: 3847518 (1974-11-01), Prasse et al.
Barmag Barmer Maschinenfabrik Aktiengesellschaft
Shurtleff John H.
Smith Leonard E.
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