ROTARY POSITIVE-DISPLACEMENT PUMP WITH MESHING GEAR WHEELS WITHOUT ENCAPSULATION, AND GEAR WHEEL FOR SUCH A POSITIVE-DISPLACEMENT PUMP

摘要

A rotary positive-displacement pump comprises two gear wheels which mesh with each other without encapsulation. Each gear wheel has a plurality of teeth with a profile which falls within a band of tolerance of ~ 1/20th of the depth of the tooth with respect to a theoretical profile similar to a profile defined by a natural spline function passing through a plurality of nodal points having pre-established coordinates {X, Y}.