Types of Greaseless Bushings Metallic Non-metallic
Experience & Problems DelaminationPlug swell MAIN PROBLEMS: Stalling and Stiction (stick-slipping)
Threshold Chatter Vibration
Servomotor Pressure Monitor Wide area network Data storage View data at office or any location on WAN Rosemount Differential pressure transmitter 4-20 ma Rosemount mounted on wheel pit wall and connected to wicket gate servomotors existing taps in most units or in governor cabinet of some units. DISPLAY Realtime pressure (5 sec. update) Max. pressure in last 24 hour period Graph of max. pressure per day for last 365 days. Graph of max. head per day for last 365 days.
X-Y, Gate - Pressure Chart (Wet) AFTER
X-Y, Gate - Pressure Chart (dry)
Future of Greaseless Options to consider: Greaseless materials Green grease and bronze* Standard greased bronze* *Hybrid: install greased bronze for stem bushings and pads, use greaseless for linkages.
Things to Consider for greaseless installation : Force – servomotors Friction – coeff. of friction & head Fatigue – will the material last?