Development and testing of PTFE based Composite Bearing Material for Turbine Pump
Pushkar Venkatesh Kulkarni1, N. K. Chapkhhane2
1Mr. Pushkar Venkatesh Kulkarni, ME (Mechanical-Design) Student RIT, Sakharale, Sangli, India.
2Prof. N. K. Chapkhhane , Mechanical Engineering Department, RIT Sakharale, Sangli, India.
Manuscript received on July 17, 2012. | Revised Manuscript received on August 25, 2012. | Manuscript published on August 30, 2012. | PP: 15-20 | Volume-1 Issue-6, August 2012.  | Retrieval Number: F0583071612/2012©BEIESP

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Abstract: In Vertical submerged turbine pumps the long shafts are supported at intervals by transmission bearings. The radial load acting on shaft is taken care by the intermediate bearings. These transmission bearings are lubricated by the flowing liquid through pump. During starting as water level is below line shaft bearing it requires prepublication before start. Selection of the bearing material becomes critical in situations where we don’t have pre lubrication water available. Also remote start and stop is difficult. In this scenario pump runs dry during initial start. Our aim is to develop bearing which will take care of dry running. When pumped water is sea water / raw water containing sand/abrasive particles then line shaft sleeve bearing should withstand against wear. To cater the problems in conventional bearings and to find the appropriate bearing material focus is given on latest trends & Tribological developments in the world. Different PTFE based composite bearing. In this study, composite materials were comparatively investigated under actual load and sliding velocities by using in a Pump. The influence of inorganic fillers MoS2, on the wear of the glass & bronze fabric reinforced epoxy composites under dry & wet running conditions has been checked. Bronze filled PTFE bearing are found excellent and will serve as an alternative to conventional bearings.
Keywords: PTFE, Composite bearings, fillers, Vertical turbine pump.