Abstract :
A well-known disadvantage of pneumatic tires is the cessation of the ability to work with mechanical damage through and determines the need to search for fundamentally new design solutions for wheel movers to increase the safety of civilian automobiles and the survivability of wheeled armored vehicles. One such solution is the use of airless tires made of elastic polymeric materials. The Department of Mechanical Engineering and Transport of the Bratsk State University has developed a technology and made full-scale model of the wheel with airless tires made of elastic polyurethanes of domestic production for a car. The new technology is a combination of the method of manufacturing wheel mover and equipment, tooling and tools for its implementation in small-scale production. The method of casting the polyurethane mixture and the original design of the casting dies is characterized in that the wheel rim is one of the molding elements of the casting matrix and forms a strong adhesive bond with the airless tire seat ring. Flexible spokes and airless tire support ring are manufactured in stages using sets of molding rings of various sizes. Foundry matrix produced from moisture-resistant plywood, polyvinyl chloride and carbon steel. The created full-scale models have constructive and technological disadvantages, but are generally suitable for further bench and road tests, which are aimed at determining the output parameters and characteristics and evaluating their influence on the performance properties of the vehicle. The developed technology can be claimed by manufacturers of wheeled vehicles for various purposes.
Keyword :
non-pneumatic tires, casting matrix, polyurethane elastomers, polymerization chamber, curing process