Three layer composite self-lubricating sliding bearing with modified polyimide wear layer and preparation method thereof

Abstract

The invention discloses a three layer composite self-lubricating sliding bearing with a modified polyimide wear layer and a preparation method thereof. A layer of porous spherical bronze powder is sintered on a layer of a steel plate; a layer of modified polyimide wear resistant material is covered on the porous spherical bronze powder layer to prepare a sheet material of the self-lubricating sliding bearing; and the sheet material of the self-lubricating sliding bearing is prepared into products of a sliding bearing in a spindle sleeve shape or a thrust washer or a slide plate or a friction disc sheet or ball seat structural member. A production technology comprises steps of: preparing modified polyimide mash, sintering the spherical bronze powder, preparing, coating, sintering the modified polyimide, finishing rolling, cutting material and forming. The three layer composite self-lubricating sliding bearing with the modified polyimide wear layer of the invention has excellent performances of good rigidity, high strength, high temperature resistance, friction resistance and no lead, and is especially suitable for heavy load, variable load and high PV value sliding bearing.

Description

technical field [0001] The invention relates to a sliding bearing, in particular to a three-layer composite self-lubricating sliding bearing with a modified polyimide wear-resistant layer on the sliding surface and a manufacturing method thereof. Background technique [0002] In the 1970s, the British Glacier company came out with DU bearings. It is a sliding bearing made of three-layer composite materials. The lining layer of the friction layer is a mixture of polytetrafluoroethylene (PTFE) and lead (Pb) sintered. It is characterized by low Friction, wear resistance, self-lubrication, the emergence of DU bearings has replaced the traditional sliding bearings that must rely on oil lubrication. It is a subversive revolution in the field of sliding bearings, which greatly reduces material costs, reduces volume, and reduces labor costs and the environment. pollute. DU products have been used until now, but there are still many shortcomings in DU products. Firstly, it contains ...

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in this bearing: ①The manufacturing process is too complicated. The first step to obtain a high-performance sliding bearing is to control the production process and quality of the modified PEEK film to ensure that its performance meets the design requirements; the second step is to pass temperature, Pressure ensures the bonding strength of PEEK film and porous copper powder composite sheet

Therefore, the production cost is high, the output is low, the product quality is low, and the product consistency and stability are not good enough.

② There is still room for improvement in performance, especially the glass transition temperature is only 143°C, which cannot be applied to high temperature 300°C working conditions

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