tailieunhanh - Machinery Component Maintenance and Repair Part 7

Tham khảo tài liệu 'machinery component maintenance and repair part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 230 Machinery Component Maintenance and Repair Figure 5-21. Elevation triangles for reverse-indicator alignment example. 012 Figure 5-22. Plan view triangles for reverse-indicator alignment example. Machinery Alignment 231 Figure 5-20 represents the plan view. Here . too far north at inboard feet. . too far north at outboard feet. Summarizing we should 12 A 14 J 12 26 A . 14 J Lower inboard feet . Lower outboard feet in. say in. Move inboard feet south in. Move outboard feet south in. These results obviously agree closely with our graphical results. Again the same results could have been obtained mathematically. To begin with we have to provide a machine sketch Figure 5-23. Then Correction Centerline Centerline Ê B C A A A AA A at Inboard LOffset at S Offset at A A B Centerline Offset at S. Figure 5-23. Machine sketch for reverse-indicator alignment example. 232 Machinery Component Maintenance and Repair Correction at Outboard B C D A B J Centerline Offset at S Centerline Offset at A. Centerline Offset at S. Ê14 12 I 14 J Using numbers from our example - 14 12 I - - 14 J say lower IB . - 14 12 26 I - . 14 J say raise OB . - say move IB . south - f14 12 26 14 J say move OB in. or . south Again the answers come out all right if you get the signs right but the visualization is difficult unless you make scale drawings or graphical plots representing the as found conditions. The Graphical Procedure for Reverse Alignment As mentioned earlier the reverse dial indicator method of alignment is probably the most popular method of measurement because the dial indicators are installed to measure the relative position of two shaft centerlines. This section emphasizes this method because of the ease of .