Handbook of Shaft Alignment Part 18 docx

10 122 4 6 8 14161820222426 0.5 1.0 1.5 2.0 Maximum deviation at either point of power transmission Mils per inch Speed (RPM x 1000) Misalignment tolerance guide Angle degrees 0.10 0.08 0.06 0.04 0.02 R e a l i g n m e n t n e c e s s a r y A c c e p t a b l e Excellent FIGURE 9.6 Recommended maximum misalignment of flexibly connected rotating machinery. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 20 6.10.2006 5:38pm Scale: 20 in. 50 mils Up Side view Gear Motor A Compressor Motor B A laser alignment system was used between Motor A and Motor B. With Motor A named as the stationary machine, the following moves on Motor B were indicated by the laser : lower “near” foot 40 mils raise “far” foot 15 mils Baseplate restriction points 0 50 10 40 20 30 + _ 10 40 20 30 0 50 10 40 20 30 + _ 10 40 20 30 T B 0 T B 0 T B EEWW E EW W 0 T B 0 Sag compensated readings −40 +36 Sag compensated readings −50 −106 Motor B Gear to spool Compressor to spool Gear FIGURE 17.18 Four-element drive system side view alignment model of all four shafts and the vertical restriction boundary. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 21 6.10.2006 5:38pm Scale: 20 in. 50 mils Gear Motor A Compressor Motor B Lateral movement restriction points East Top view Motor B Field readings Gear to Spool Compressor to Spool 0 −30 20 Field readings +60 −43 −23 T B EW 0 Gear +14 +30 T B EW 0 T B EW 0 T B EW 0 −66 +44 −30 +40 +30 0 −80 0 0 +20 T B E W 0 +16 T B EW T B EW T B EW A laser alignment system was used between Motor A and Motor B. With Motor A named as the stationary machine, the following moves on Motor B were indicated by the laser: move “near” foot 50 mils east move “far” foot 45 mils west 0 50 10 40 20 30 + _ 10 40 20 30 0 50 10 40 20 30 + _ 10 40 20 30 FIGURE 17.19 Four-element drive system side view alignment model of all four shafts and the lateral restriction envelope. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 22 6.10.2006 5:38pm Roll Motor Gear Up view Roll Gear Scale: 10 in. or 20 mils s Motor Side Alignment model “fold axis” South East Up Side view Scale: 10 in. or 20 mils 10 in. or 20 mils RollMotor Gear Right angle gear “fold” axis FIGURE 17.23 Right-angle drive system ‘‘folded’’ side view alignment model. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 23 6.10.2006 5:38pm Top view Scale: 5 in. or 50 mils 5 in. or 50 mils Roll Motor Gear East North South West Lateral movement restriction points 37 mils west 10 mils west 12 mils east 15 mils north 13 mils south 13 mils north FIGURE 17.29 Top view alignment model showing possible alignment corrective moves in the lateral direction staying within the boundary conditions. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 24 6.10.2006 5:38pm Offset—the shafts are parallel to each other and in the X −Y plane but one shaft/sheave is to the right of left of the other shaft/sheave in the Y direction. Pitch—the shafts are in the X −Y plane but one shaft/sheave is rotated through the Z- axis. Skew—the shafts are not in the same plane and one shaft/sheave is rotated through the X- axis. X Y Z Combination—this is the most common type of misalignment condition (and the most complex) where the shafts are not in the same plane and one shaft/sheave is rotated through both the the X- and Z- axis. FIGURE 18.17 Types of belt and sheave misalignment conditions. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 25 6.10.2006 5:38pm Lower position gap readingsUpper position gap readings Machine name _______________ Date: __________________ Aligned by: _________________________ O North O South O East O West O Up O Down Straightedge ____ inches ____ inches ____ inches ____ inches Straightedge Machine name _______________ O North O South O East O West O Up O Down Record here Record here ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils ___ mils V-belt / Sheave • Alignment recording sheet • Measure the distance between the outboard and inboard bolts of both machines • Measure the distance from the inboard feet to where the straightedge will be placed to capture the gap readings on the sheaves • Measure the distance between the shaft centerlines Measure the dimensions of the machinery Measure the distances across each sheave at the upper and lower gap measurement locations. Determine what type of gap condition you have based on the four different configurations shown below. Using feeler gauges, measure and record the amount of the gaps (in mils) in the appropriate window. Measure and record all of the distances shown in the diagrams below. Sheave measurement distances with straightedge in upper position. Sheave measurement distances with straightedge in lower position. Upper to lower straightedge separation distances across each sheave. ___ inches ___ inches FIGURE 18.26 V-belt and sheave alignment recording sheet. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 26 6.10.2006 5:38pm Bolt hole boundary conditon 18 mils north 6 mils south 12 mils north 18 mils south East Top View Motor Fan 2 in. or 20 mils 2 in. or 20 mils Scale: Straightedge lin e FIGURE 18.30 Possible alignment corrections for the motor and fan in the top view. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 27 6.10.2006 5:38pm 10 in. Scale : Up Side view Motor A Roll A Motor B Roll B Idler roll Baseplate or frame restriction points Looking east Add 80 mils Pivot Pivot Add 110 mils Remove 95 mils Remove 110 mils Add 290 mils Remove 80 mils Pivot Remove 180 mils 200 mils or 10 in. FIGURE 20.37 Side view alignment model showing one possible solution. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 28 6.10.2006 5:38pm 10 in. Scale: 50 mils or 10 in. East Top view Motor A Roll A Motor B Roll B Idler roll Lateral movement restriction points 35 mils west Pivot 22 mils east Pivot 20 mils west Pivot 50 mils west Pivot 60 mils west Pivot FIGURE 20.38 Top view alignment model showing one possible solution. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 29 6.10.2006 5:38pm [...]... south 12 mils TIR here Scale: eter circle diam S N 0 Pump shaft measurement plane FIGURE 21.27 As-found alignment model of motor and pump shaft as viewed in the north to south direction Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 31 6.10.2006 5:38pm East 30.4 in 22.27 in 8.15 in Motor shaft centerline 180 wide x 100 tall grid West G–L bolt plane add 3 mils H–K... Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 32 6.10.2006 5:38pm Thrust runner is not perpendicular to centerline of rotation Not 90Њ Conical whirling orbit is produced with locus at thrust runner FIGURE 21.66 A nonperpendicular thrust runner face will force the rotating assembly to orbit Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page... Ϫ107 E W 0 Pump shaft E W 0 30 Ϫ107 10 40 50 _ 0 + 10 40 20 Pump shaft centerline measurement plane 30 5 in and 10 mils 20 5 in and 10 mils W 0 Balance ring Pump shaft centerline Scale: E 40 10 50 _ 0 + 40 10 20 30 30 20 40 10 50 _ 0 + 40 10 30 Balance ring measurement plane Ϫ103 20 Adjusting nut measurement plane Adjusting nut FIGURE 21.28 As-found alignment model of motor and pump shaft as viewed...Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 30 6.10.2006 5:38pm rline cente 180 wide x 100 tall grid North Apparent motor to pump housing flange mating plane shaft Motor South Adjusted motor to pump housing flange mating plane 63 in bolt 8.15 in 4 in 22.27 C–J bolt... mils Adjusting nut Apparent pump shaft centerline (i.e outer surface with runout) 02 01 04 05 + 0 _ 01 04 20 30 30 10 50 _ 0 + 40 10 0 +4 S N 0 N 0 Pump shaft +13 02 03 01 04 05 + 0 _ 01 04 02 03 6 mils TIR here S Adjusting nut measurement plane Balance ring Balance ring measurement plane 40 20 02 03 5 in and 10 mils 03 11 mils TIR here Actual pump shaft centerline of rotation (i.e compensated for . 17 .18 Four-element drive system side view alignment model of all four shafts and the vertical restriction boundary. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof. As-found alignment model of motor and pump shaft as viewed in the north to south direction. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_Plates Final Proof page 30 6.10.2006 5:38pm 180 . DK4322_Plates Final Proof page 24 6.10.2006 5:38pm Offset—the shafts are parallel to each other and in the X −Y plane but one shaft/ sheave is to the right of left of the other shaft/ sheave in the