Rotor for use in a rotary pump

Details Rotor for use in a rotary pump Rotor for use in a rotary pump

1998-02-12

2000-11-14

Denion, Thomas

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

4182065, F01C 118

Patent

active

061461210

ABSTRACT:
Fluid being pumped by rotary piston/lobe pumps is prone to fluid cavitation particularly at the leading and trailing edges of the rotor.
A rotor 10 comprises a generally cylindrical rotor hub portion 108 formed with two piston wing portions 110, 111. The piston wing portions 110, 111 are disposed transversely of the axis 13 on a substantially flat surface 112 of the hub portion 108. Extending from the surface 112 coaxially with axis 13, and disposed radially within the rotor hub portion 108, is a tubular portion 114 through which the end of shaft 15 passes when the rotary pump assembly is in an assembled state.
Each piston wing portion 110, 111 is formed with a sinuous curved leading face region 113 and a sinuous curved trailing face region 115.
The radially outermost (relative to the rotor axis) region of the leading face region 113 is formed with a leading curved edge part 116 and the radially outermost region of the trailing face region is formed with a trailing curved edge part 118.

REFERENCES:
patent: Re29627 (1978-05-01), Wheatherston
patent: 3844695 (1974-10-01), Wheatherston
patent: 3941521 (1976-03-01), Wheatherston
patent: 4033708 (1977-07-01), Wheatherston
patent: 4076469 (1978-02-01), Wheatherston
patent: 4437818 (1984-03-01), Wheatherston
patent: 4797077 (1989-01-01), Anderson
patent: 4938670 (1990-07-01), Lee
patent: 5039289 (1991-08-01), Eiermann et al.
patent: 5559288 (1996-09-01), Shumacher
patent: 5788473 (1998-08-01), Buse

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