vertical hydro unit alignment - hpaechpaec.com/hydroalignment 123hpa.pdf · top view of thrust...
TRANSCRIPT
VERTICAL HYDRO UNIT ALIGNMENT
CRITICAL UNIT COMPONENTS:
Turbine runner
Generator rotor
Turbine shaft
Generator shaft
Thrust bearing
Turbine guide bearing
Generator guide bearing
VERTICAL HYDRO UNIT ALIGNMENT
WHY ALIGN??
BEARINGS
Thrust bearing
Turbine guide bearing
Generator guide bearing
ALIGN ROTATING TO
STATIONARY PARTS
Plumb the parts
Alignments equalize the
Load on the bearings
VERTICAL HYDRO UNIT ALIGNMENT
STEPS IN UNIT ALIGNMENT
Load the thrust bearing
Plumb the shafts
Stationary parts alignment
Rotation check
Center rotating parts
& adjust guide bearings
VERTICAL HYDRO UNIT ALIGNMENT
LOADING THRUST BEARING
VERTICAL HYDRO UNIT ALIGNMENT
Types of Thrust Bearings: 1. Spring bed
2. Self-equalizing
3. Compression tube
4. Jack Screw
THRUST BEARING SHOES EQUALIZED
VERTICAL HYDRO UNIT ALIGNMENT
TOP VIEW OF THRUST
BOTTOM VIEW OF THRUST
VERTICAL HYDRO UNIT ALIGNMENT
BOTTOM VIEW OF THRUST
1. Hydrostatic lift system
2. Center generator shaft during installation
3. Preload thrust bearing by jacking unit with
brake jacks to unload, then tighten screws
4. Electronic slug arc method for jack screw type
1 FT
~0.00028”
1 M
ILE
(5280 F
T)
PING PONG
BALL
1 FT
0.00025”
PLUMB TOLERANCE
VERTICAL HYDRO UNIT ALIGNMENT
“ROTATION CHECK”
VERTICAL HYDRO UNIT ALIGNMENT
1. Plumb center of rotation
2. Maintain a small “throw circle”, <L/D*0.002”
OLD METHOD
VERTICAL HYDRO UNIT ALIGNMENT
NEW METHODS
VSAT “Vertical Shaft Alignment Tool”
VERTICAL HYDRO UNIT ALIGNMENT
US Patent 7,111,407
Resulting from modern technology
•Inclinometers
•Prox-probes, etc
VSAT “Vertical Shaft Alignment Tool”
VERTICAL HYDRO UNIT ALIGNMENT
1. Use inclinometers instead of plumb wires
2. Use prox-probes instead of dial indicators
US Patent 7,111,407
VERTICAL HYDRO UNIT ALIGNMENT
VSAT “Vertical Shaft Alignment Tool”
THANK YOU
VERTICAL HYDRO UNIT ALIGNMENT
For more information:
1. HydroView Article on
VSAT, Sept. 2008, find in
Hydroworld.com
2. Google Patent : 7,111,407
3. Jeff Jones,