Vane Pump Core Profile for Uniform Displacement

The pump core is designed with a non-uniform radial separation profile where different sections have different radii. Specifically, the core includes a first section with a first radius and a second section with a second radius greater than the first radius. This local variation in geometry compensates for the diminishing fluid displacement that occurs as vanes retract, thereby maintaining substantially uniform total pump displacement throughout the rotational cycle.

The non-linear modification of the vane radius or core profile employs curved geometric transitions rather than abrupt changes. This curvature approach distributes the displacement compensation smoothly across the rotation cycle, reducing flow pulses while maintaining manufacturability through continuous, differentiable profile shapes that can be fabricated using standard machining or molding processes.