The improvement of friction bearing manufacturing technology by using copper alloy

详细信息    查看全文

• 作者：Murat Kuanyshev ; Becket Nuralin…
• 关键词：Manufacturing technology ; Friction bearings ; Copper alloy ; Bronze filling on a steel basis ; High anti ; frictional properties
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：1-4
• 页码：317-324
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：88

文摘

The research objective is to increase the operational life of friction bearings by technological methods, particularly, in relation to kinematic mechanisms used for conversion of motion in the tractor-type internal combustion engines. The research object is the process of friction and wear in friction bearings. Theoretical regularities related to change in friction and wear parameters in the bearings were used, depending on the used materials and load conditions. The studies were conducted by the selection of variants of friction pairs for friction bearings used in kinematic mechanisms of internal combustion engines operating at high radial loads and under rapidly changing load modes. In the course of this study, the authors selected the best design and technological characteristics for bearings with certain pairs of friction and studied the friction and wear regularities of the selected pairs of friction bearings. The study also implied the analysis of the initial data for the evaluation of wear resistance of the selected pairs of friction bearings and the development of technical specifications for their use in internal combustion engines. The use of copper for manufacturing the bearing shell was determined as one of the promising ways to increasing their quality indicators. Highly effective properties of copper for manufacturing the supporting elements of plain bearings were experimentally confirmed. The operational life of bearings can reach 14,000 motor-hours, which exceeds the operational life of a standard serial bearing shell by more than eight times. The economic result of applying the copper inserts implies the fact that given an increase in engine cost approximately by 2 %, repair costs per 1 h of the engine run are reduced by more than eight times. Design features of the proposed shells differ from the standard ones only by material; their dimensions and configuration are completely analogous to the standard inserts that allow using the new type of inserts for all currently used engine models. The most significant theoretical result of this study is the obtained functional connection of the friction and wear performance, expressed as a thermal stability coefficient, which gives the possibility to justify the choice of materials for the kinematic mechanisms of motion conversion in the tractor-type internal combustion engines based on studying thermal properties, characteristics of the materials employed, and the expected operating conditions. Industrial implementation of research results will give the economic effect—application of the developed bearings results in repair cost reduction by more than eight times.