Compressable sealing ring assembly

Patent metadata

Field	Value
Publication number	US-9239114-B2
Application number	US-201213668549-A
Country	US
Kind code	B2
Filing date	Nov 5, 2012
Priority date	Nov 5, 2012
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

A compressible sealing ring assembly seals an annulus between a radially outer member and a radially inner member. The sealing ring comprises one or more sealing ring members ( 28 ), a radially outer wall for sealing with the inner wall of the radially outer member and radially inner wall for sealing with the outer wall of the radially inner member. A compression ring member ( 10 ) having a concave lower surface and a convex upper surface exerts an axial force on a sealing ring member to deform the sealing ring member to maintain a seal.

First claim

What is claimed is:

1. A compressable sealing ring assembly for sealing an annulus of a packing box between a radially outer member having an inner wall and a radially inner member having an outer wall, the sealing ring assembly comprising:
at least three annular compression ring members each having a concave lower surface and a convex upper surface, a radially outer wall for engagement with the inner wall and a radially inner wall for engagement with the outer wall;
at least two annular sealing ring members each acted on by the concave lower surface of one of the compression ring members and acted on by the convex upper surface of another one of the compression ring members to deform the sealing ring members to maintain a seal, wherein prior to being acted on by the compression ring members, the sealing ring members each include upper and lower surfaces disposed substantially perpendicular to the radially inner and outer walls; a ring shaped packing follower having a substantially planar surface for exerting a force on a sealing ring member of the compressable sealing ring assembly, wherein the substantially planar surface is disposed substantially perpendicular to the radially inner and outer walls; and
another sealing ring member acted on by the convex upper surface of one of the compression ring members and acted on by the substantially planar surface of the packing follower, wherein prior to being acted on by the one of the compression ring members and the packing follower, the another sealing ring member includes upper and lower surfaces disposed substantially perpendicular to the radially inner and outer walls,
wherein an endmost one of the compression ring members has the concave lower surface thereof positioned for engagement with a planar surface of the packing box.

2. The compressable sealing ring assembly as defined in claim 1 , wherein the sealing ring members are formed from a flexible graphite material.

3. The compressable sealing ring assembly as defined in claim 1 , wherein the sealing ring assembly comprises a plurality of stacked sealing ring members and a plurality of stacked compression ring members, with at least one compression ring member having an upper and a lower compression ring surface in engagement with respective sealing ring members when an axial force is applied to the sealing ring members.

4. The compressable sealing ring assembly as defined in claim 1 , wherein top surfaces of the sealing ring members are substantially perpendicular to radically inner walls of the compression ring members before an axial force is applied to the sealing ring members.

5. The compressable sealing ring assembly as defined in claim 1 , wherein lower surfaces of the sealing ring members are substantially perpendicular to the radially outer walls of the compression ring members before an axial force is applied to the sealing ring members.

6. A compressable sealing ring assembly for sealing an annulus of a packing box between a radially outer member having an inner wall and a radially inner member having an outer wall, the sealing ring assembly comprising:
a plurality of annular spaced compression ring members each having a concave lower surface and a convex upper surface, a radially outer wall for engagement with the inner wall and a radially inner wall for engagement with the outer wall;
a plurality of annular spaced sealing ring members each acted on by a respective compression ring member to deform the sealing ring member to maintain a seal; and
a ring shaped packing follower having a substantially planar surface for exerting a force on one of the sealing ring members, wherein the substantially planar surface is disposed substantially perpendicular to the radially inner and outer walls;
wherein two of the plurality of spaced sealing ring members are each acted on by the concave lower surface of a compression ring member of the plurality of compression ring members and acted on by the convex upper surface of another compression ring member of the plurality of compression ring members,
wherein another one of the plurality of spaced sealing ring members is acted upon by the convex upper surface of a compression ring member of the plurality of compression ring members and acted upon by the substantially planar surface of the packing follower, and wherein prior to being acted on by the compression ring members and the packing follower, the sealing ring members each include upper and lower surfaces disposed substantially perpendicular to the radially inner and outer walls, and
wherein an endmost one of the plurality of compression ring members has the concave lower surface thereof positioned for engagement with a planar surface of the packing box.

7. The compressable sealing ring assembly as defined in claim 6 , wherein each sealing ring member is formed from a flexible graphite material.

8. The compressable sealing ring as defined in claim 6 , wherein top surfaces of the sealing ring members are substantially perpendicular to radially inner walls of the compression ring members before an axial force is applied to the sealing ring members.

9. The compressable sealing ring as defined in claim 6 , wherein lower surfaces of the sealing ring members are substantially perpendicular to the radially outer walls of the compression ring members before an axial force is applied to the sealing ring members.

10. A method of sealing with a sealing ring assembly an annulus of a packing box between a radially outer member having an inner wall and a radially inner member having an outer wall, the method comprising:
providing at least three annular compression ring members each having a concave lower surface and a convex upper surface, a radially outer wall for engagement with the inner wall and a radially inner wall for engagement with the outer wall;
providing at least two annular sealing ring members each acted on by the concave lower surface of one of the compression ring members and acted on by the convex upper surface of another one of the compression ring members to deform the sealing ring members to maintain a seal, wherein prior to being acted on by the compression ring members, the sealing ring members each includes upper and lower surfaces disposed substantially perpendicular to the radially inner and outer walls;
providing a ring shaped packing follower having a substantially planar surface for exerting a force on a sealing ring member, wherein the substantially planar surface is disposed substantially perpendicular to the radially inner and outer walls;
providing another sealing ring member acted on by the convex upper surface of one of the compression ring members and acted on by the substantially planar surface of the packing follower, wherein prior to being acted on by the one of the compression ring members and the packing follower, the another sealing ring member includes upper and lower surfaces disposed substantially perpendicular to the radially inner and outer walls; and
providing an endmost one of the at least three annular compression ring members having the lower concave surface thereof positioned for engagement with a planar surface of the packing box.

11. The method as defined in claim 10 , wherein the sealing ring assembly comprises a plurality of stacked sealing ring members and a plurality of stacked compression ring members, with at least one sealing ring member having an upper and a lower compression ring member in engagement therewith.

12. The method as defined in claim 10 , wherein top surfaces of the sealing ring members are substantially perpendicular to radially inner walls of the compression ring members before an axial force is applied to the se

Assignees

• Pgi Int Ltd
• Parker Hannifin Corp

Inventors

• Lee Ricardo

Classifications

• F16J15/30

  with sealing rings made of carbon · CPC title

• F16J15/20 Primary

  Packing materials therefor · CPC title