Rotary fluid machine

F - Mech Eng,Light,Heat,Weapons – 04 – B

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Details

F04B 27/06 (2006.01) F01B 13/06 (2006.01) F01C 1/344 (2006.01) F01C 11/00 (2006.01) F01C 21/08 (2006.01) F02G 5/00 (2006.01) F04C 18/344 (2006.01)

Patent

CA 2421185

Rotary fluid machinery capable of converting the reciprocating motions of pistons (41) and the rotating motion of a rotor (31) to each other by the engagement of rollers (59) with annular grooves (60), wherein a positive peak value of the pressure load of the piston (41) on the roller (59) engaged with the annular groove (60) is generally identical to the positive peak value of a centrifugal force load on the roller, and the phase of the two peaks are shifted relative to each other, and the phase of the negative peak of the pressing down load of the vane (42) on the roller (59) is overlapped at least partly with the phase of the positive peak of the pressure load of the piston (41), whereby the peak value of the total load on the rollers (59) and the amount of load variation can be suppressed to increase the durability of the rollers (59).

L'invention concerne une machine à fluide rotative convertissant mutuellement les mouvements réciproques des pistons (41) et le mouvement rotatif d'un rotor (31) par l'engagement mutuel de cylindres (59) et de rainures annulaires (60). Une valeur de crête positive de la charge de pression du piston (41) sur le cylindre (59) qui s'engage mutuellement avec la rainure annulaire (60) est généralement identique à la valeur de crête positive d'une charge de force centrifuge sur le cylindre, et les phases des deux crêtes sont mutuellement décalées. Par ailleurs, la phase de la crête négative de la charge d'appui de l'aube (42) sur le cylindre (59) se chevauche au moins partiellement avec la phase de la crête positive de la charge de pression du piston (41), moyennant quoi il est possible de supprimer la valeur de crête de la charge totale sur les cylindres (59) et la marge de variation de charge pour améliorer la durabilité des cylindres (59).

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