Cylinder liner preload system
AssigneeNational-Oilwell, L.P.
InventorsJames Aday, Lopek Drzewiecki, Michael Kubinski, Andrew Riley
Life of this patent
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Abstract
Apparatus and method for applying radial compressive stress pre-loading to a cylinder liner. A cylinder housing is attached to a pump, and a cylinder liner is disposed within the cylinder housing. A fluid inlet in fluid communication with the annular space between the cylinder housing and cylinder liner is disposed on the cylinder housing. The annular space is filled with pressurizing fluid through the fluid inlet, which creates radial compressive stress pre-loading on the cylinder liner.
Claims24
An assembly for pre-loading a cylinder liner, the assembly comprising:
- a cylinder housing attached to a pump;
- a cylinder liner disposed within said cylinder housing;
- a fluid inlet disposed on said cylinder housing, wherein said fluid inlet is in fluid communication with an annular space between the cylinder housing and the cylinder liner;
- and
- wherein the annular space is filled with a pressurizing fluid.
A method for pre-loading a cylinder liner, the method comprising:
- disposing the cylinder liner in a cylinder housing connected to a pump;
- filling an annular space between the cylinder liner and the cylinder housing with a fluid;
- and
- applying a fluid pressure to the cylinder liner and creating radial compressive stress on the cylinder liner.
A cylinder liner cartridge assembly for insertion into a cylinder housing, comprising:
- a cylinder liner, wherein a coating is bonded to the cylinder liner;
- a first ring disposed about a first end of the cylinder liner;
- and
- a second ring disposed about a second end of the cylinder liner, wherein the first ring and the second ring operate to align the cylinder liner cartridge assembly within said cylinder housing.
An assembly for pre-loading a cylinder liner, the assembly comprising:
- a cylinder housing attached to a pump;
- a cylinder liner disposed within the cylinder housing;
- a coating bonded to the cylinder liner;
- a diaphragm disposed in an annular space between the cylinder housing and cylinder liner;
- and
- a fluid inlet disposed on said cylinder housing, wherein the fluid inlet is in fluid communication with the annular space, and the annular space is filled with a pressurizing fluid.
Dependencies are inferred from the claim text.