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A kind of graphite/aluminum base self-lubricating sliding bearing containing graphene and preparation method thereof

A sliding bearing and graphene technology, which is applied to shafts and bearings, bearing components, mechanical equipment, etc., can solve the problems of self-lubricating sliding bearings, such as self-heavy weight, poor self-lubricating effect of bearings, and easy environmental pollution, and achieves low processing costs. , the effect of abundant reserves and low price

Active Publication Date: 2019-07-02
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a graphene-containing graphite / aluminum base self-lubricating sliding bearing and its preparation in order to solve the problems of the existing self-lubricating sliding bearings, such as heavy weight, easy pollution of the environment, poor bearing self-lubricating effect, and short service life. method

Method used

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  • A kind of graphite/aluminum base self-lubricating sliding bearing containing graphene and preparation method thereof
  • A kind of graphite/aluminum base self-lubricating sliding bearing containing graphene and preparation method thereof
  • A kind of graphite/aluminum base self-lubricating sliding bearing containing graphene and preparation method thereof

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Embodiment 1

[0032] Such as Figure 8 Shown, a kind of preparation method of graphite / aluminum base self-lubricating sliding bearing containing graphene, it comprises the steps:

[0033] 1) Design a graphite skeleton model with a ring-shaped honeycomb structure through CAD software (such as figure 2 , image 3 , Figure 4 shown), in which the ring-shaped honeycomb structure graphite skeleton, by calculation, its mass fraction is 8% of the inner graphite / aluminum-based self-lubricating composite material layer, the length of a single honeycomb side is 4mm, and the width of a honeycomb side is 0.30mm. The thickness of the graphite skeleton of the annular honeycomb structure is 2 mm.

[0034] 2) Composition of natural flake graphite powder, phenolic resin powder, and graphene in a proportioned mixture, and through selective laser sintering (SLS), according to the skeleton model designed above, a ring-shaped honeycomb structure graphite skeleton green body is prepared . Wherein the pheno...

Embodiment 2

[0043] 1) Design a graphite skeleton model with a ring-shaped honeycomb structure through CAD software (such as figure 2 , image 3 , Figure 4 shown), in which the ring-shaped honeycomb structure graphite skeleton, by calculation, its mass fraction is 10% of the inner graphite / aluminum-based self-lubricating composite material layer, the single honeycomb side length is 4mm, and the honeycomb side width is 0.37mm. The thickness of the graphite skeleton of the annular honeycomb structure is 2 mm.

[0044] 2) Composition of natural flake graphite powder, phenolic resin powder, and graphene in a proportioned mixture, and through selective laser sintering (SLS), according to the skeleton model designed above, a ring-shaped honeycomb structure graphite skeleton green body is prepared . Wherein the phenolic resin is 30% of the mass fraction of the graphite powder, and the content of graphene is 3% of the mass fraction of the overall mixture.

[0045] 3) Bake the graphite skelet...

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Abstract

The invention discloses a graphite / aluminum-based self-lubricating sliding bearing containing graphene and a preparation method thereof. A self-lubricating sliding bearing consists of an outer circle of aluminum alloy layer and an inner circle of graphite / aluminum-based self-lubricating composite material layer, wherein the inner circle of graphite / aluminum-based self-lubricating composite material layer is formed by an annular honeycomb structure graphite framework and an aluminum alloy filled with honeycomb structure holes. The graphite in the inner circle is prepared by a mixture being formed by natural crystalline graphite powder, phenolic resin powder and graphene powder, and the annular honeycomb structure graphite framework is prepared by adopting a selective laser sintering method. The phenolic resin accounts for 20 to 50 percent by mass of the graphite powder, the content of the graphene is 1 to 3 percent by mass of the overall mixture, and the thickness of the annular honeycomb structure graphite framework is 2 to 5mm. The self-lubricating sliding bearing has excellent self-lubricating performance under a dry friction condition of a poor working condition environment.

Description

technical field [0001] The invention relates to a self-lubricating sliding bearing, in particular to a self-lubricating sliding bearing made of multilayer composite materials, which belongs to the field of preparation of wear-resistant materials. Background technique [0002] Self-lubricating sliding bearings refer to a type of sliding bearings that can ensure the normal operation of the shaft in a stable and low-friction state without adding self-lubricating agents such as lubricating oil and grease. Self-lubricating bearings are usually composed of an outer matrix alloy and an inner self-lubricating layer through direct bonding, sintering or hot rolling to form a whole. The commonly used self-lubricating layer is a mixture composed of polytetrafluoroethylene (PTFE), thermoplastics, molybdenum disulfide, graphite, etc., which is compounded on the inner surface of the outer matrix alloy layer by the above method to play the role of self-lubricating. However, the self-lubric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/04C22C21/02C22C21/08B22D23/04
CPCB22D23/04C22C21/02C22C21/08F16C33/04
Inventor 叶喜葱肖克强曹如心林咸参吴彬彬
Owner CHINA THREE GORGES UNIV
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