USE OF SECONDARY MATERIALS IN THE RESTORATION OF SLEEVE BEARING BUSHINGS EFFICIENCY

Abstract

The relevance of the work is caused by the need of repairing bushings that have working wear, to improve the anti-friction characteristics of tribo-tension, to save expensive raw materials and the need of resource saving technologies implementation. There is no doubt in saving expensive materials and replacing them with less expensive ones or using metalworking production waste. Provision of increased values of loads and sliding speeds with a general reduction in the cost of interfaces and comparable inter-repair periods is achieved by using chip waste and conducting economical dynamic alloying at the micro level with materials that can improve the performance of interfaces in general. The decrease in value of anthropogenic influence is achieved due to the use of relatively waste-free recovery methods. The aim of the research is to create a tribo-voltage that works effectively under the specified operating conditions, while limiting the amount of waste of expensive resources and minimizing the negative impact on the environment. For this purpose a base of crushed metal waste is used with the application of economical dynamic alloying. Methods: theoretical studies of the proposed material resistance, the design of the coupling and the method of its application; calculation of material application process parameters depending on operating conditions. Results. The authors have determined the best value of linear parameters of elementary chip waste, the optimal value of alloying elements for these operating conditions and developed the technology for obtaining materials with pre-set properties with the ability to adjust individual properties depending on the actual operating conditions. The developed technology for repairing heavy-loaded plain bearings functioning under adverse operating conditions was tested in the conditions of a modern machine-building enterprise.

Keywords

• resource saving
• obtaining coatings from mechanical processing waste
• economical alloying
• anti-friction material from secondary raw materials
• plasma-forming gas
• eco-friendly application technology