Thrust bearing and preparation method thereof

Abstract

The invention belongs to the field of bearing preparing, and particularly relates to a novel thrust bearing and a preparing method. The novel thrust bearing comprises a bearing layer made of tungstencarbide, metal net layers symmetrically arranged on the two sides of the bearing layer and a diamond layer attached to the metal net layers. One or multiple diamond layers are added on the surface ofthe bearing, the bearing wear resistance can be improved, due to a metal net, diamond distribution is controlled, the adding amount of the diamond is reduced, and the wear resistance property is moreeffectively used.

Description

technical field [0001] The invention belongs to the field of bearing preparation, and in particular relates to a thrust bearing and a preparation method. Background technique [0002] Pressure bearings used in oil and coal mines play the role of carrying axial loads during drilling or drilling. The pure sliding operation between the bearings bears heavy axial loads during the drilling process and slides with the screw rotation. This working form puts forward high requirements on the wear resistance of the bearing. Conventional bearings are made of tungsten carbide and brazing material. Oil drilling tools, especially non-magnetic drilling tools for coal mines, often drill more than 5,000 meters in a single piece. In the middle, because the bearing wear exceeds the dimensional tolerance, it needs to be disassembled and replaced. There are expensive composite sheet bearings. The composite sheet is inserted into the matrix, and the composite sheet and the composite sheet slide r...

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Problems solved by technology

[0002] Pressure bearings used in oil and coal mines play the role of carrying axial loads during drilling or drilling. The pure sliding operation between the bearings bears heavy axial loads during the drilling process and slides with the screw rotation. This working form puts forward high requirements on the wear resistance of the bearing. Conventional bearings are made of tungsten carbide and brazing material. Oil drilling tools, especially non-magnetic drilling tools for coal mines, often drill more than 5,000 meters in a single piece. In the middle, because the bearing wear exceeds the dimensional tolerance, it needs to be disassembled and replaced. There are expensive composite sheet bearings. The composite sheet is inserted into the matrix, and the composite sheet and the composite sheet slide relatively, and the wear resistance will be greatly improved. The cost is quite high, which limits the use of composite bearings. At present, in industries such as petroleum or coal mines, the use of composite bearings is not scaled up. This invention designs a thrust bearing with low cost and good wear resistance.

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