Rotary expansible chamber devices – With mechanical sealing – Seal element between working member and cylinder
Patent
1980-04-17
1983-06-28
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Seal element between working member and cylinder
418206, F04C 1818, F04C 2700
Patent
active
043903312
ABSTRACT:
A positive displacement four-lobe impeller structure for use as a fluid driving or a fluid driven member or pump or generator is presented. The terminology pump is used to describe said structure subsequently. The pump comprises a symmetrical cylindrical housing having two 190.degree. arc cross-section interior walls separated by an inlet area and an outlet area. Inside the housing and disposed a selected distance apart therein are two cylindrical axially symmetric identical impellers. Each impeller comprises four interior concave arc sidewalls disposed 90.degree. apart and forming the base of four lobes. The concave arc side walls flow into and couple to exterior convex arc sidewalls which in turn flow into and connect to dual slightly extended tips. Each of said tips is separated from the opposite tip on the end of the lobe by an arc tip indentation. Each impeller is coaxial with the 190.degree. arc cross-section interior wall of the housing adjacent to it and has a radius very slightly less than the radius of the 190.degree. arc, so that the tips of the impellers come very close to the interior side walls, but do not touch them. The housing is of sufficient size so that the impellers are placed just far enough apart so that the tips of each impeller fail by a small distance to touch the adjacent interior concave arc side wall of the opposing impeller during rotation.
REFERENCES:
patent: 12350 (1865-02-01), Holly
patent: 2491677 (1949-12-01), McCulloch
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