Screw rotor and method of manufacturing the same

Details Screw rotor and method of manufacturing the same Screw rotor and method of manufacturing the same

1993-11-01

1995-01-03

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

29888023, B23P 1500

Patent

active

053774078

ABSTRACT:
A method for manufacturing 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. The screw rotor includes 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 includes 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: 2349022 (1944-05-01), Unger et al.
patent: 2362106 (1944-11-01), Unger et al.
patent: 3918838 (1975-11-01), Moody, Jr. et al.
patent: 5310320 (1994-05-01), Timuska

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