Compact Radial Piston Hydraulic Machine Having a Cylinder Block with Deforming Regions

摘要

A hydraulic machine has a cylinder body with first and second ports and a plurality of cylinder bores disposed radially with openings through a side surface. Deformation regions, formed around each cylinder bore opening, expand and contract in response to pressure changes in the cylinder bores. A continuous band extends around the cylinder body closing the cylinder bore openings and applying a pre-stress compressive force to each deformation region. A plurality of pistons are slideably received in the plurality of cylinder bores and a plurality of valve arrangement couple the cylinder bores to the first and second ports. A shaft with an eccentric cam drives the pistons to slide within the cylinder bores. Each deformation region distorts in response to pressure in the associated cylinder bore wherein the circumference of that cylinder bore becomes more circular as the cylinder pressure increases.

主权项

1. A hydraulic machine comprising:
a cylinder body with a first port, a second port and a side surface, and having a plurality of cylinder bores disposed radially about an axis with each cylinder bore having an opening through the side surface, the cylinder body further having deformation regions formed around each opening, wherein the deformation regions expand and contract radially with respect to the axis in response to pressure changes in the cylinder bores; a closing band extending around the cylinder body and closing the openings of the plurality of cylinder bores, wherein the closing band applies force to each deformation region that compresses the cylinder body; a plurality of piston assemblies each slideably received in a different one of the plurality of cylinder bores; a plurality of valve arrangements the plurality of cylinder bores to the first and second ports; and a drive shaft rotatably received in the cylinder block for driving the plurality of piston assemblies within the plurality of cylinder bores.