Page 7 - Rotating Machinery Pratical Solutions to Unbalance and Misalignment

Equivalent Weights ............................................................................... 67
Two Plane Balancing ............................................................................. 71
Which Method ....................................................................................... 85
Overhung Rotors ................................................................................... 86
Notes on Balancing ............................................................................... 87

CHAPTER 6—A SINGLE PLANE BALANCING TECHNIQUE ........... 89
Introduction ............................................................................................ 89
Graphical Solution ................................................................................. 89

CHAPTER 7—MISALIGNMENT OF MACHINE SHAFTS ................... 97
Introduction ............................................................................................ 97
Types of Misalignment ......................................................................... 98
Misalignment in Belt Drives ............................................................. 100
Phase Angle Relations ........................................................................ 103
Note on Electric Motors ..................................................................... 106
Summary ............................................................................................... 107

CHAPTER 8—ADVANCED MACHINE ALIGNMENT ........................ 109
Introduction .......................................................................................... 109
Overview ............................................................................................... 110
Electric Motors ..................................................................................... 111
Shims ...................................................................................................... 111
Soft Feet ................................................................................................. 112
Torquing ................................................................................................ 113
Couplings .............................................................................................. 116
The Alignment Fixture and Bar Sag ................................................ 117
Basic Machine Measurements ........................................................... 118
About Indicator Readings .................................................................. 120
Taking Indicator Readings ................................................................. 125
Vertical Alignment ............................................................................... 126
The Graphical Method ....................................................................... 127
Calculator Method ............................................................................... 130
Moving the Machine in the Horizontal Plane ............................... 132
Thermal Growth and Hot Alignments ............................................ 133
Equipment with Driveshafts ............................................................. 142
U-joint Couplings ................................................................................ 143
Spool Pieces .......................................................................................... 144
Bore Readings ...................................................................................... 145
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