Screw rotor comprising a plurality of thin plates

Details Screw rotor comprising a plurality of thin plates Screw rotor comprising a plurality of thin plates

1992-10-15

1994-03-01

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

4182011, F04C 208

Patent

active

052901505

ABSTRACT:
A screw rotor for use in a hydraulic machine which has a pair of rotors engageable with each other to compress fluid, pump fluid or expand fluid, and a method of manufacturing such a screw rotor. The screw rotor comprises a shaft, a screw body including a number of stacked thin plates bonded with one another, and a cavity provided in the screw body and formed by openings of the stacked thin plates. The method of manufacturing a screw rotor comprises the steps of preparing a number of thin plates having at least one opening, stacking the thin plates in such a manner that a through hole of the thin plate receives a shaft, filling a cavity formed by the openings of the stacked thin plates with powdery pressure medium, and bonding the stacked thin plates with one another by diffusion bonding under a hot isostatic pressing process.

REFERENCES:
patent: 885109 (1908-04-01), Truss
patent: 2325617 (1943-08-01), Lysholm et al.
patent: 2349022 (1944-05-01), Ungar et al.
patent: 2362106 (1944-11-01), Ungar et al.
patent: 3918838 (1975-11-01), Moody, Jr. et al.
Patent Abstracts of Japan, vol. 7, No. 124 (M-218), May 28, 1983, & JP-A-58-041-670, Mar. 10, 1983, M. Kuragano.
Patent Abstracts of Japan, vol. 7, No. 124 (M-218), May 28, 1983, & JP-A-58-041-634, Mar. 10, 1983, M. Kuragano.
Journal of Materials Process Technology, Nov. 1986, pp. 1-9, Nakagawa, et al., "Attempts to Manufacture Materials by Laminating Thin Plates".

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