Gear pump with improved inlet port

Details Gear pump with improved inlet port Gear pump with improved inlet port

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 2/08 (2006.01) F04C 18/08 (2006.01)

Patent

CA 2611761

With a traditional gear pump inlet design it is difficult to fill the pumping chamber when the inlet pressure is low or the operating speed is high A gear pump (100) is provided and includes an inlet port (116) which terminates, in the pumping direction of the rotor set (104) in a radially inwardly extending ramp portion( 132) The ramp portion (132) operates to direct working fluid from the inlet (116) radially inwardly into the pumping chamber (126) of the rotor set (104) which is passing over the ramp portion (132) By closing the pumping chamber (126) at a radially inwardly point, the filling efficiency of the pumping chamber (126) is improved, reducing cavitation and/or operating noise of the pump.

Avec la conception traditionnelle d~une admission de pompe à engrenages, il est difficile de remplir la chambre de pompage quand la pression d~admission est faible ou la vitesse de fonctionnement élevée. Dans le cadre de l~invention, une pompe à engrenages (100) comporte un orifice d~admission (116) qui se termine, dans le sens de pompage du jeu de rotor (104), en une partie de rampe (132) s~étendant radialement vers l~intérieur. Le fonctionnement de la partie de rampe (132) dirige le fluide opérationnel de l~admission (116) radialement vers l~intérieur à la chambre de pompage (126) du jeu de rotor (104) qui passe au-dessus de la partie de rampe (132). Fermer la chambre de pompage (126) à un point situé radialement vers l~intérieur permet une amélioration efficace du remplissage de la chambre de pompage (126), ce qui réduit la cavitation et/ou les bruits de fonctionnement de la pompe.

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