Rotor for a rotary screw machine having internal member and exte

Details Rotor for a rotary screw machine having internal member and exte Rotor for a rotary screw machine having internal member and exte

1992-10-13

1994-05-10

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Coating, specific composition or characteristic

416241A, 418152, 418179, 29888023, 29DIG31, F04C 1500

Patent

active

053103203

ABSTRACT:
A rotor for a rotary screw machine has helical lobes (12) and grooves (14). A shell structure (18) forming the external surface of the rotor is made of pressed metal power. The rotor is manufactured by cold isostatic pressing of a powder in a vessel having a surface shaping rotor. The pressure is applied radially by means of a cast bag in which high pressure liquids acts. After the pressing process, the rotor blank is sintered and attached to a shaft (16).

REFERENCES:
patent: 2714314 (1955-08-01), Ulander
patent: 3506383 (1970-04-01), Ewalt
patent: 3591337 (1971-07-01), Lambey
patent: 3918838 (1975-11-01), Moody, Jr. et al.
patent: 4570316 (1986-02-01), Sakamake et al.
patent: 4846642 (1989-07-01), Nuber et al.
patent: 4859164 (1989-08-01), Shimomura
Smith, Principles of Materials Science and Engineering, 1986, pp. 548-550 & 450-455.

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