A forged, mill liner bolt (100) has a head (114), a shank (112), tapered load-bearing surfaces (116) and lateral projections (120) defining an undercut surface (117), and a sealing member (118) abutting the undercut surface. A plurality of plastically deformable projections (122) extend from the tap
A forged, mill liner bolt (100) has a head (114), a shank (112), tapered load-bearing surfaces (116) and lateral projections (120) defining an undercut surface (117), and a sealing member (118) abutting the undercut surface. A plurality of plastically deformable projections (122) extend from the tapered load-bearing surfaces (116) for spreading a load applied to the bolt. Sealing member (118) provides a partially-elastic joint to maintain clamp loading. Sealing member (118) provides an interior seal within a bore in a mill liner to prevent leaking of and racing by mill slurry liquids.
대표청구항▼
1. A mill liner bolt for use within a mill liner defining a mill liner bore, the mill liner bolt comprising: a mill liner bolt shank;an oblong mill liner bolt head extending from the mill liner bolt shank, the oblong mill liner bolt head defining opposed lateral sides configured to be non-load-beari
1. A mill liner bolt for use within a mill liner defining a mill liner bore, the mill liner bolt comprising: a mill liner bolt shank;an oblong mill liner bolt head extending from the mill liner bolt shank, the oblong mill liner bolt head defining opposed lateral sides configured to be non-load-bearing upon loading of the mill liner bolt, tapered load-bearing surfaces extending towards the mill liner bolt shank at opposite ends of the oblong mill liner bolt head, the tapered load-bearing surfaces configured to be load-bearing during loading of the mill liner bolt and further defining undercut surfaces extending between respective tapered surfaces and the mill liner bolt shank; anda compressible sealing member abutting the undercut surfaces and extending along the opposed lateral sides of the mill liner bolt head, and configured with a portion of the compressible sealing member extending beyond the adjacent respective tapered load-bearing surfaces such that compression of the portion extending beyond the adjacent respective tapered load-bearing surfaces during loading of the mill liner bolt forms a partially elastic joint adjacent a metal-to-metal joint formed with the tapered load-bearing surfaces, and causes the sealing member to be at least partially extruded beyond the opposed lateral sides to fill a clearance gap defined between the oblong mill liner bolt head and the mill liner bore. 2. The mill liner bolt of claim 1, further comprising lateral projections disposed on opposite sides of the oblong mill liner bolt head between the tapered surfaces and substantially aligned with the undercut surfaces to support the compressible sealing member during loading. 3. The mill liner bolt of claim 2, wherein the tapered load-bearing surfaces and the lateral projections are formed by forging. 4. The mill liner bolt of claim 1, in combination with the mill liner defining the bore therein; wherein the compressible sealing member is configured and positioned to reduce contact loading and thereby reduce risk of break-out of the mill liner bolt proximate a central through-hole portion of the bore in the mill liner. 5. The mill liner bolt of claim 4, wherein the compressible sealing member is configured to provide a seal between the mill liner bolt and the bore in the mill liner. 6. The mill liner bolt of claim 1, in combination with the mill liner, wherein the compressible sealing member is configured to be compressed during loading of the mill liner bolt and to absorb impacts to and vibration of the mill liner bolt during compaction of the mill liner bolt by a mill ball or ore during mill operation. 7. The mill liner bolt of claim 1, in combination with the mill liner, wherein the compressible sealing member is positioned to sealingly engage a mill liner bore surface substantially complementary to the tapered surfaces of the oblong mill liner bolt head. 8. The mill liner bolt of claim 1, further comprising a plurality of projections extending from the tapered surfaces and configured to deform during loading in contact with the mill liner. 9. The mill liner bolt of claim 1, in combination with the mill liner, wherein the sealing member is compressible during loading of the mill liner bolt so as to be at least partially extruded into a void defined between the mill liner bolt shank and a central through-hole portion of a bore defined in the mill liner. 10. The mill liner bolt of claim 1, in combination with the mill liner, wherein the sealing member is configured to reduce racing of the mill liner by forming an interior seal within the mill liner substantially preventing flow of slurry through a bore defined in the mill liner. 11. The mill liner bolt of claim 10, wherein the compressible sealing member is configured with sufficient thickness and durometer such that compression of the sealing member resists impact loosening of the mill liner bolt during compaction of the oblong mill liner bolt head by mill balls or ore contained within the mill liner during mill operation. 12. The mill liner bolt of claim 1, wherein a portion of the sealing member defines a substantial continuation of a taper profile of the respective tapered surface. 13. The mill liner bolt of claim 1, wherein the sealing member comprises an elastomeric O-ring positioned over the mill liner bolt shank and abutting the respective undercut surface. 14. The mill liner bolt of claim 1, in combination with the mill liner, wherein the sealing member is configured to provide an interior seal against escape of slurry from within the mill liner and to absorb impacts to and vibration of the mill liner bolt during mill operation. 15. A mill liner bolt comprising: a mill liner bolt shank;an oblong mill liner bolt head defining opposed tapered surfaces at opposite ends thereof and lateral surfaces extending therebetween and further defining a seal support; wherein the tapered surfaces are configured to be load-bearing during loading of the mill liner bolt and the lateral surfaces are configured to be non-load-bearing during loading of the mill liner bolt; anda compressible sealing member disposed about the mill liner bolt shank abutting the seal support adjacent the tapered surfaces and configured with a portion of the compressible sealing member extending beyond the adjacent respective tapered surfaces such that compression of the portion extending beyond the adjacent respective tapered surfaces during loading of the mill liner bolt causes the sealing member to be at least partially extruded beyond the on nosed lateral sides to fill a clearance gap defined between the oblong mill liner bolt head and the mill liner bore. 16. The mill liner bolt of claim 15, wherein the oblong mill liner bolt head further comprises lateral projections defining at least a portion of the seal support. 17. The mill liner bolt of claim 15, further comprising deformable ridges extending from the tapered surfaces. 18. The mill liner bolt of claim 15, in combination with a mill liner, wherein the sealing member is positioned to provide a high-pressure seal between the oblong mill liner bolt head and a complementary mill liner surface to substantially prevent racing of fastening surfaces or the mill liner. 19. A method of forming an interior seal within a mill liner fastening, the method comprising: providing a mill liner defining a mill liner bore therein including an oblong recess countersunk at oblong ends thereof and a central through-hole;providing a mill liner bolt comprising a mill liner bolt shank and a mill liner bolt head extending from the mill liner bolt shank, the mill liner bolt head defining opposed lateral sides, opposed tapered load-bearing surfaces extending towards the mill liner bolt shank at opposite ends of the lateral sides, and further defining a sealing member support surface between each of the tapered load-bearing surfaces and the mill liner bolt shank; providing a compressible sealing member abutting the sealing member support surfaces and extending along the opposed lateral sides of the mill liner bolt head, and configured with a portion of the compressible sealing member extending beyond the adjacent respective tapered load-bearing surfaces of the mill liner bolt head;loading the mill liner bolt to compress the portion of the sealing member extending beyond the adjacent respective tapered load-bearing surfaces of the mill liner bolt head to form a partially elastic joint; andfurther loading the mill liner bolt to form a metal-to-metal joint between only the tapered load-bearing surfaces of the mill liner bolt head and complementary countersunk surfaces of the mill liner bore; andextruding the compressible sealing member beyond the opposed lateral sides to form an interior seal within the mill between the mill liner bolt head and the mill liner bore. 20. The method of claim 19, wherein the interior seal is formed by compression of the portion of the sealing member extending beyond the adjacent respective tapered load-bearing surfaces causing the sealing member to be at least partially extruded into filling a clearance gap defined between the mill liner bolt head and the mill liner bore. 21. The method of claim 19, further comprising securing an exterior sealing plate to the exterior of the mill liner with the mill liner bolt as a supplementary seal to the interior seal.
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이 특허에 인용된 특허 (3)
Clarke Ronald C., Apparatus for sealing a milling liner to a milling shell with improved sealing capacity.
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