公开(公告)号：US20250034950A1

公开(公告)日：2025-01-30

申请号：US18361426

申请日：2023-07-28

Applicant: Caterpillar Inc.

Inventor： Swetha Suresh ,  Ebi Bernard ,  Tamilmurasu Annadurai ,  Hyung Kyu Yoon

IPC: E21B10/24 ,  C10M113/08 ,  F16C33/66 ,  F16C37/00

Abstract: An air-cooled tricone bit having an air conduit corresponding to individual cones of the tricone bit is filled with lubricant or grease with particles therein is disclosed. The grease may include fullerene-like particles, such as tungsten disulfide, molybdenum disulfide, graphene, graphite, or the like. By packing the air conduit of the tricone bit with the grease with particles, the grease with particles may flow during an initial break-in period of the tricone bit to coat the internal components of the tricone bit. This reduces the friction between the internal components of the tricone bit, such as journal bases, cones, and/or bearing elements. The reduced friction between the internal components of the tricone bit result in reduced wear, both during the break-in period and after the break-in period. The reduced wear results in a greater operating lifetime of the tricone bits.

公开(公告)号：US20250035158A1

公开(公告)日：2025-01-30

申请号：US18361356

申请日：2023-07-28

Applicant: Caterpillar Inc.

Inventor： Swetha Suresh ,  Ebi Bernard ,  Tamilmurasu Annadurai ,  Hyung Kyu Yoon

IPC: F16C33/66 ,  F16C43/04

Abstract: A tricone bit having one or more bearings with deposited lubricant layers is disclosed. The lubricant layers may comprise one or both of a metal-phosphate and/or solid lubricant. The lubricant layers may be disposed on one or more of the bearings, the journal bases, and/or the cones. The lubricant layers can also be used for applications of bearings other than for tricone bits. The deposited lubricant layers may be more persistent lubrication for tricone bits, such as air-cooled tricone bits, compared to conventional lubricants for tricone bits. The metal-phosphate layer may include one or more of zinc phosphate, manganese phosphate, iron phosphate, or the like. The solid lubricant may include one or more inorganic fullerenes, tungsten disulfide, molybdenum disulfide, graphite, graphene, or the like.