F - Mech Eng,Light,Heat,Weapons – 04 – C
Patent
F - Mech Eng,Light,Heat,Weapons
04
C
F04C 18/18 (2006.01) F04C 18/08 (2006.01) F04C 18/16 (2006.01) F04C 23/00 (2006.01) F04C 29/00 (2006.01) H02K 7/14 (2006.01) H02K 16/00 (2006.01) H02K 51/00 (2006.01)
Patent
CA 2492495
A screw pump includes a pair of screw rotors (2a, 2b) having teeth which are held in mesh with each other for drawing and discharging a fluid by rotating the screw rotors (2a, 2b) synchronously in opposite directions. The teeth of the screw rotors (2a, 2b) have the same shape as each other and are coiled helically in opposite directions. The teeth of the screw rotors (2a, 2b) have an axial tooth profile which allows a pair of facing teeth surfaces T of the screw rotors (2a, 2b) to be brought into contact with each other only at a pitch line P when the pair of facing teeth surfaces T are brought into contact with each other.
La présente invention concerne une pompe à vis équipée d'une paire de vis-rotors (2a, 2b) dont les dents s'engrènent d'une vis à l'autre, de façon à aspirer et décharger un fluide par rotation synchrone des vis-rotors (2a, 2b) en sens opposés. Les dents des vis-rotors (2a, 2b) ont la même forme sur les deux vis, mais elles forment des enroulements hélicoïdaux en sens opposés. Les dents des vis-rotors (2a, 2b) présentent un profil axial de la dent permettant aux deux surfaces T en vis-à-vis des dents des vis-rotors (2a, 2b) de ne venir au contact l'une de l'autre qu'au niveau de la ligne de référence P lorsque les deux surfaces T en vis-à-vis des dents viennent au contact l'une de l'autre.
Matake Kozo
Miyashita Nobuhito
Ebara Corporation
Ebara Densan Ltd.
Riches Mckenzie & Herbert Llp
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