Mertens, A Johnney2016-12-162023-10-262016-12-162023-10-262016ROLL NO. 126103014https://gyan.iitg.ac.in/handle/123456789/775Supervisor: S. SenthilvelanPolymer composite gears are being utilized in many engineering applications due to their light weight, self-lubrication, cost effectiveness, and mass production capabilities. However, thermal sensitive mechanical properties of the polymers limit their extended usage. During service, polymer gears generate heat caused by repetitive tooth surface interaction and material hysteresis. In this work, an attempt was made to investigate the potential of using air cooling, asymmetric tooth profile and carbon nano-tube (CNT) reinforcement in polypropylene gears to enhance the performance.Performance of injection-moulded polypropylene (PP) gear was evaluated with and without air cooling, using inhouse developed power absorption gear test rig. Measurement of gear weight, surface temperature and periodical measurement of tooth thickness confirmed the enhancement of wear resistance and gear life by the air cooling.enMECHANICAL ENGINEERINGThesis