Wicket Gate Bushings Grease vs. Greaseless Slide 2 1. Linkage
bushings 2. Bearing 3. Wear pads 4. Wicket gate bushings 5. Wicket
gate bushings 6. Packing wear strips 7. Wicket gate bushings 1.
Bearing 2. Linkage bushings 3. Wicket gate bushings 4. Wicket gate
bushings 5. Wear pads 6. Trunnion bushings 7. Trunnion bushings 8.
Wicket gate bushings Greaseless Bushing Applications Slide 3 Types
of Greaseless Bushings Metallic Non-metallic Slide 4 Experience
& Problems DelaminationPlug swell MAIN PROBLEMS: Stalling and
Stiction (stick-slipping) Slide 5 Why? Slide 6 Threshold Chatter
Vibration Slide 7 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. Slide 8 X-Y, Gate - Pressure
Chart (Wet) AFTER Slide 9 X-Y, Gate - Pressure Chart (dry) Slide 10
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. Slide 11 Things to Consider for greaseless installation :
Force servomotors Friction coeff. of friction & head Fatigue
will the material last? Slide 12 APPENDIX OTHER CHARTS OF INTEREST
Slide 13 Slide 14 X-Y, Gate - Pressure Chart (Dry) Slide 15 X-Y,
Gate - Pressure Chart (Wet)
