초록 ▼

An improved axial-piston energy converting device is provided by utilizing a thin ceramic wear plate insert, having a typical thickness of only about 0.005 to 0.040 inches in thickness, as a cam surface secured by atmospheric pressure to an underlying support surface of a steel cam plate support str

An improved axial-piston energy converting device is provided by utilizing a thin ceramic wear plate insert, having a typical thickness of only about 0.005 to 0.040 inches in thickness, as a cam surface secured by atmospheric pressure to an underlying support surface of a steel cam plate support structure. Attachment of the wear plate to the cam plate supporting surface is accomplished by polishing both a supporting surface of the cam plate, and a mating surface of the wear plate to a very smooth finish, and wiping a thin film of a fluid such as oil onto one of the polished surfaces prior to placing the wear plate onto the supporting surface. The highly polished, together with the light film of oil, result in a joint that is essentially air tight. Atmospheric pressure acting on the cam surface of the wear plate serves to hold the wear plate tightly in place on the support surface in the same manner that a pair of Johansson blocks are held together if their highly polished surfaces are mated.

대표청구항 ▼

[ We claim:] [1.] An energy converting device comprising:a) port plate means defining inlet and discharge ports;b) a cylinder block rotatable relative to said port plate means about an axis passing through said port plate means;c) said cylinder block having therein axially oriented cylinders seriall

[ We claim:] [1.] An energy converting device comprising:a) port plate means defining inlet and discharge ports;b) a cylinder block rotatable relative to said port plate means about an axis passing through said port plate means;c) said cylinder block having therein axially oriented cylinders serially communicable with the inlet and outlet ports in said port plate means;d) pistons slidable in said cylinders and including bearing slippers pivotably mounted on the ends thereof; ande) cam plate means at one end of said cylinder block for reciprocating said pistons within said cylinders;said cam plate means including:a support structure that is deformable when normal hydraulic pressure is present within the cylinders of the device, said support structure also having a relatively smooth and flat supporting surface; anda thin insert of ceramic material mounted on said supporting surface between said support structure and said bearing slipper;said ceramic insert being sufficiently thin to resiliently deform against said support surface without undue stress in the insert when normal hydraulic pressure is present within the cylinders of the device. [12.] In an energy converting device including:a) port plate means defining inlet and discharge ports;b) a cylinder block rotatable relative to said port plate means about an axis passing through said port plate means;c) said cylinder block having therein axially oriented cylinders serially communicable with the inlet and outlet ports in said port plate means;d) pistons slidable in said cylinders and including bearing slippers pivotably mounted on the ends thereof; ande) cam plate means at one end of said cylinder block for reciprocating said pistons within said cylinders;said cam plate means including:a support structure that is deformable when normal hydraulic pressure is present within the cylinders of the device, said support structure also having a relatively smooth and flat supporting surface; anda thin insert mounted on said supporting surface between said support structure and said bearing slipper;said insert being sufficiently thin to resiliently deform against said support surface without undue stress in the insert when normal hydraulic pressure is present within the cylinders of the device;a method for mounting said insert on said supporting surface comprising the steps of:(1) polishing both said supporting surface of said support structure and a faying surface of said insert bearing against said support structure to surface finishes of about one micro-inch to thirty-two micro-inches; and(2) applying a thin coating of fluid to one of said supporting or faying surfaces prior to placing said surfaces in contact with one another.