Hydraulic piston pump with reduced restriction barrel passage

摘要

The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.

主权项

1. A hydraulic piston pump barrel, comprising:
a block; a plurality of cylinders provided within the block, each cylinder having a cylinder wall; and a fluid flow aperture provided at an end of each cylinder, each fluid flow aperture being defined by surfaces provided at compound angles, wherein the fluid flow apertures are defined by a first and second output engagement walls, and first and second input engagement walls, wherein the first and second output engagement walls and first and second input engagement walls are all provided at different angles relative to the cylinder walls, wherein the second input engagement wall is provided parallel to the cylinder wall.