Three stage self-regulating gerotor pump

Details Three stage self-regulating gerotor pump Three stage self-regulating gerotor pump

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 2/10 (2006.01) F04C 15/04 (1995.01)

Patent

CA 2229056

A gerotor pump is described for use with non-compressible fluids such as automotive coolant or hydraulic oil. The pump includes three separate pump outlet ports, a bypass return passage, and an integral four position spool valve. Increasing back pressure from a downstream load is sensed by the spool valve which moves accordingly to restrict the fluid supplied. In the first position a full flow fluid is supplied to the load from all three ports. In the second position one port is vented to the bypass and the flow from the other two ports is directed to the load. In the third position two ports vent to bypass, and one port drives the load. In the fourth position all ports vent to bypass. In each case flow vented to bypass is not first compressed, permitting a smaller motor to be used.

L'invention concerne une pompe à engrenage intérieur destinée à être utilisée avec des fluides non compressibles tels que du liquide de refroidissement ou de l'huile hydraulique pour automobiles. La pompe comprend trois orifices de sortie de pompe séparés, un passage de retour à contournement, et un distributeur à tiroir cylindrique solidaire à quatre positions. L'augmentation du reflux provenant d'une charge aval est détectée par le distributeur à tiroir cylindrique, lequel se déplace conséquemment afin de réduire le fluide fourni. Dans la première position, un fluide est fourni à la charge par les trois orifices à plein débit. Dans la seconde position, un orifice est ouvert sur le contournement et le flux provenant de l'autre orifice est dirigé vers la charge. Dans la troisième position, deux orifices s'ouvrent sur le contournement et un orifice commande la charge. Dans la quatrième position, tous les orifices s'ouvrent sur le contournement. Dans chaque cas, le flux dirigé vers le contournement n'est pas en premier lieu comprimé, permettant l'utilisation d'un moteur plus petit.

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