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Alignment of vertical shaft hydrounits - part 4

Với hệ thống Permaplumb, nó là khó khăn để xác định chính xác dogleg trục, và không có cách nào để kiểm tra bù đắp ở các khớp nối. TNHH dây hoặc đọc Hamar tia laser có thể được sử dụng để kiểm tra các trục thẳng, nhưng nếu đường kính runout tĩnh được chấp nhận tại tất cả các tạp chí mang hướng dẫn, độ thẳng của trục không nên quan trọng. | Unit Runout Data and Runout Plot Column A Multiplier to Determine Total Out-ofPlumb A E E Column B Values in Column 5 of Runout Worksheet Column C Total Out-of-Plumb Column A Column B Column D Direction Shaft is Out-ofPlumb Column 6 0 Position North-South 3.125 0.0060 0.0187 N East West 3.125 0.00075 0.0023 W 90 Position North-South 3.125 0.00725 0.0227 N East West 3.125 0.00425 0.0133 E 180 Position North-South 3.125 0.0020 0.0063 N East West 3.125 0.00525 0.0164 E 270 Position North-South 3.125 0.0010 0.0031 N East West 3.125 0.00025 0.0008 E A Distance from First Elevation to Thrust Bearing 170 E Distance from First Elevation to Fourth Elevation 80 Figure 17. Runout data and plot. 28 6.5 Static Runout Procedure II When dial indicators are used the form in figure 18 should be used. The plot of this data will be only the plot of the runout at the location of the lower dial indicators. The origin is the position of the shaft at 0 degrees. The center of runout is again the intersection of the lines from 0 to 180 and 90 to 270 degrees. This plot is also shown in figure 18. To correlate the runout plot to the plumb of the center of runout one set of plumb readings is required at 0 degrees. In this example the plumb data from figures 14 and 15 are used. The position of the thrust runner with reference to the runout plot can be determined by measuring the out of plumb from the thrust bearing to the elevation where the lower dial indicators are located on the plumb plot. For this example we will assume that the dial indicators are located at the thrust bearing elevation and at the same elevation as the fourth plumb reading elevation. These values can then be used to plot the center of the thrust runner with respect to the 0-degree point. As with the other method of measuring static runout the plot is a top view of the unit. To make the center of runout plumb it must be moved under the center of the thrust runner. This is accomplished by plumbing the unit as described in