Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1992-04-15
1993-09-28
Kwon, John T.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
4151701, F04D 2970
Patent
active
052482383
ABSTRACT:
A housing 14 forms, together with a cover 34, an annular vortex chamber 42. An impeller 22 is provided with a disk portion 24 which is connected to a drive shaft 12 so that the impeller 22 rotates integrally with the shaft 12. The impeller 22 has an annular support portion 26 and rows of angularly-spaced blade portions 28 and 30 arranged along the circumference of the impeller. The blade portions 28 and 30 are located in the vortex chamber 42. A seal portion is created between the impeller 22, the housing 14 and the cover 34, which seal portion is constructed by inner axial slits 72A and 72B formed between axially-spaced surfaces transverse to the axis of the shaft 12, radial slits 74A and 74B formed between radially spaced-apart cylindrical surfaces, and outer axial slits 76A and 76B formed between axially spaced-apart surfaces transverse to the axis of the shaft 12. The thickness of the radial slits 74A and 74B is smaller than a half of the thickness of at least one of the inner or outer axial slits, and the length of the radial slits 74A and 74B is between 2 mm and 5 mm.
REFERENCES:
patent: 4194798 (1980-03-01), Schonwald et al.
patent: 4204802 (1980-05-01), Schonwald et al.
patent: 4806073 (1989-02-01), Schonwald
patent: 4907945 (1990-03-01), Schonwald
patent: 4943208 (1990-07-01), Schonwald
patent: 4992022 (1991-02-01), Aust et al.
Ishida Shinji
Matsui Kazunori
Kwon John T.
Nippondenso Co. Ltd.
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