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Wicket Gate Bushings Grease vs. Greaseless. 1. Linkage bushings 2. Bearing 3. Wear pads 4. Wicket gate bushings 5. Wicket gate bushings 6. Packing wear.

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Presentation on theme: "Wicket Gate Bushings Grease vs. Greaseless. 1. Linkage bushings 2. Bearing 3. Wear pads 4. Wicket gate bushings 5. Wicket gate bushings 6. Packing wear."— Presentation transcript:

1 Wicket Gate Bushings Grease vs. Greaseless

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

3 Types of Greaseless Bushings Metallic Non-metallic

4 Experience & Problems DelaminationPlug swell MAIN PROBLEMS: Stalling and Stiction (stick-slipping)

5 Why?

6 Threshold Chatter Vibration

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.

8 X-Y, Gate - Pressure Chart (Wet) AFTER

9 X-Y, Gate - Pressure Chart (dry)

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.

11 Things to Consider for greaseless installation : Force – servomotors Friction – coeff. of friction & head Fatigue – will the material last?

12 APPENDIX OTHER CHARTS OF INTEREST

13

14 X-Y, Gate - Pressure Chart (Dry)

15 X-Y, Gate - Pressure Chart (Wet)


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