High-bearing-capacity self-lubricating shaft sleeve and preparation method thereof

Abstract

The invention discloses a high-bearing-capacity self-lubricating shaft sleeve and a preparation method thereof. The high-bearing-capacity self-lubricating shaft sleeve consists of a metal base, a middle abrasion-resistant layer and a surface spraying layer, wherein the surface spraying layer is prepared from, by weight, 1-5 parts of graphite, 2-5 parts of molybdenum disulfide, 1-4 parts of aramidfiber powder, 2-5 parts of polytetrafluoroethylene micro powder, 0.5-3 parts of curing agent, 0.5-2 parts of flexibilizer, 5-10 parts of dimethyl sulfoxide, 10-15 parts of n-butyl alcohol, 1-33 partsof acetone and 45-50 parts of epoxy resin, and the middle abrasion-resistant layer is a nitriding treatment layer. The high-bearing-capacity self-lubricating shaft sleeve has excellent abrasion resistance, self-lubricating property, fatigue durability, impact resistance and creep resistance, is especially suitable for self lubrication of engineering mechanical parts under the special working conditions of high working temperature, large dust amount, high load and the like. In addition, the shaft sleeve production period is short, the cost is low, and the shaft sleeve can replace domestic imported products.

Description

technical field [0001] The invention relates to the technical field of shaft sleeves, in particular to a high-load self-lubricating shaft sleeve and a preparation method thereof. Background technique [0002] The shaft sleeve plays an important role in reducing noise, shock absorption, reducing wear and prolonging the life of the shaft parts. With the rapid development of the machinery industry, automobile industry, and aerospace industry, the requirements for high load bearing, wear resistance and self-lubricating performance of various shaft sleeves are getting higher and higher. Under high load-bearing conditions, the surface bearing capacity and wear resistance of ordinary bushings are often not satisfactory, which is manifested by gnawing and straining of the metal matrix on the friction surface, pitting corrosion and wear on the shaft diameter, resulting in reduced mechanical efficiency and serious equipment operating noise , body shaking, although the traditional surf...

AI Technical Summary

Problems solved by technology

Under high load-bearing conditions, the surface bearing capacity and wear resistance of ordinary bushings are often not satisfactory, which is manifested by gnawing and straining of the metal matrix on the friction surface, pitting corrosion and wear on the shaft diameter, resulting in reduced mechanical efficiency and serious equipment operating noise , body shaking, although the traditional surface sintered copper alloy as a self-lubricating material can improve its anti-friction performance, but its manufacturing method is relatively complicated, and copper resources are rare resources in my country compared to iron resources, so they should be used sparingly

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