Piston sealing ring assemblies
First Claim
1. A sealing ring assembly, comprising:
- a first ring comprising an extension extending axially rearwards, wherein the extension comprises a radially outward surface;
a second ring comprising an inner radial surface configured to interface with the radially outward surface of the extension, wherein the second ring comprises at least two second ring segments, wherein the at least two second ring segments are arranged such that respective ends of the at least two second ring segments form at least one interface between each other; and
a groove extending circumferentially along at least one of the radially outward surface of the extension and the inner radial surface of the second ring.
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0 Petitions
Accused Products
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.
27 Citations
27 Claims
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1. A sealing ring assembly, comprising:
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a first ring comprising an extension extending axially rearwards, wherein the extension comprises a radially outward surface; a second ring comprising an inner radial surface configured to interface with the radially outward surface of the extension, wherein the second ring comprises at least two second ring segments, wherein the at least two second ring segments are arranged such that respective ends of the at least two second ring segments form at least one interface between each other; and a groove extending circumferentially along at least one of the radially outward surface of the extension and the inner radial surface of the second ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A piston assembly comprising:
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a piston comprising a ring groove; and a sealing ring assembly arranged in the ring groove, the sealing ring assembly comprising; a first ring comprising an extension extending axially rearwards, wherein the extension comprises a radially outward surface, a second ring comprising an inner radial surface configured to interface with the radially outward surface of the extension, wherein the second ring comprises at least two second ring segments, wherein the at least two second ring segments are arranged such that respective ends of the at least two second ring segments form at least one interface between each other, and a groove extending azimuthally along at least one of the radially outer surface of the extension and the inner radial surface of the second ring. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A device comprising:
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a cylinder comprising a bore; a piston comprising a ring groove, wherein the piston is configured to travel within the bore along an axis of the bore; and a sealing ring assembly arranged in the ring groove, the sealing ring assembly comprising; a first ring comprising an extension extending axially rearwards, wherein the extension comprises a radially outward surface, a second ring comprising an inner radial surface configured to interface with the radially outward surface of the extension, wherein the second ring comprises a pocket that extends azimuthally in an outermost radial surface of the second ring, and wherein the pocket is configured to receive gas from a high-pressure region in the bore, and a groove extending azimuthally along at least one of the radially outer surface of the extension and the inner radial surface of the second ring. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification