Piston sealing ring assemblies
AssigneeMainspring Energy, Inc.
InventorsMatt Svrcek, Jodie Prudhomme
Life of this patent
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Abstract
The present disclosure provides a sealing ring assembly having a first ring and a second ring, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. Accordingly, the sealing ring assembly includes a high-pressure boundary and a low-pressure boundary. Each ring may be segmented, and the first and second rings interface along a surface. Along the surface at the interface, a groove open to the lower pressure region aids in pressure locking the sealing ring assembly. A pocket in the second ring allows for high pressure gas to aid in balancing radial forces on the sealing ring assembly. As the sealing ring wears, the first and second rings remain engaged with one another.
Claims20
A sealing ring segment configured for oil-less operation, the sealing ring segment comprising:
- a self-lubricating material;
- a radially outward surface configured to seal against a bore of a cylinder;
- an axial side configured to face a piston face of a piston in which the sealing ring segment is arranged, the piston configured to translate in the cylinder;
- a first opening in the radially outward surface, wherein the first opening extends azimuthally along the radially outward surface;
- a second opening in the axial side;
- and
- a through feature coupling the first opening to the second opening.
A piston assembly comprising:
- a piston comprising a circumferential groove that extends around an outer surface of the piston, wherein the piston is to translate axially in a bore of a cylinder;
- and
- a sealing ring assembly comprising at least one sealing ring segment configured for oil-less operation, the at least one sealing ring segment comprising:
- a self-lubricating material;
- a radially outward surface configured to seal against the bore;
- an axial side configured to face a piston face of the piston comprising the circumferential groove in which the sealing ring assembly is arranged;
- a first opening in the radially outward surface, wherein the first opening extends azimuthally along the radially outward surface;
- a second opening in the axial side;
- and
- a through feature coupling the first opening to the second opening.
A sealing ring assembly configured for oil-less operation, the sealing ring assembly comprising:
- a first ring segment comprising:
- a self-lubricating material,
- a radially outward surface configured to seal against a bore of a cylinder,
- an axial side configured to face a piston face of a piston in which the sealing ring assembly is arranged,
- a first opening in the radially outward surface, wherein the first opening extends azimuthally along the radially outward surface,
- a second opening in the axial side, and
- a through feature coupling the first opening to the second opening;
- and
- a second ring segment comprising a self-lubricating material, wherein the axial side of the first ring segment is configured to seal against the second ring segment.
Dependencies are inferred from the claim text.