ANALYSIS OF ALIGNMENT READING BY VECTORS RESULTANT METHODS

ANALYSIS OF ALIGNMENT READING BY VECTORS RESULTANT METHODS
1. To analysis alignment reading one will need the following items.
1.1. One good graph paper to plot the displacement recorded in the X & Y direction.
1.2. One Good geometry box with pencil, eraser, pencil sharpener , scale, compass, divider, protractor & set squares, etc..
2. Now in the graph paper plot co-ordinate axis and mark XX' and YY' axis.
3. To find vectors resultant the opposite vectors are transferred to opposite direction. For example vector 5 shifted to vector 1 side (1-5) , vector 6 shifted to vector 2 side (2-6) , vector 7 shifted to vector 3 side (3-7) and vector 8 shifted to vector 4 side(4-6).
4. To find out the throw plot the vector group resultant ( 1-5) & ( 3-7) ; (3-6) & (4-8) valus of ( x,y ) on a graph paper to a suitable scale. For example plots points (3,-0.5) ; (1,7) ; (2 ,1.5) and (0,1.5) for LGB ; (0,2.5) ; (3.5 , 2.5) ; (2.5 , -0.5) & (1.5 ,-2.5) for TGB of combined alignmnet checking.
5. With vector group of (1-5) and (3-7) one parallelogram is drawn and also its resultant of R-13 . With vector group (3-6) and (4-8) parallelogram is drawn and also its resultant R-28.Finally with the resultant R-13 and R-28 total resultant parallelogram is drawn and its resultant ploted to find net total resultant.
5.1. From the ploted graph value of net resultant can be calculated as per the scale of the graph. The average value of the net resultant will be the throw and the throw direction will be opposite to the direction of force. The throw angle can be measured from the ploted graph .
6. The throw at lower guide bearing and the turbine guide bearing journel to be calculated and necessary correction measure to be taken independently.