A UNIVERSAL DEVICE FOR MEASUREMENT OF RHOMBOID ANGLES OF T-ROOT BLADES OF STEAM TURBINES TO DETERMINE CO-PARALLELITY OF ROOT RADIUS OF THE BLADES

摘要

The invention relates to a universal device for measurement of rhomboid angles of T-root blades of steam turbines to determine Co-parallelity of root radius of the blades comprising a main block (1) having a second screw (8) including a hexagonal nut (6), and accommodating the steam turbine blades; a first and second side plates (2, 3) having respectively a throughbore and a counterbore vertically disposed in respect of the main block (1); and at least three pins (9), each horizontally inserted through said bores of the side plates (2, 3) at different heights, the first and the third pins (9) being positioned by one each hex.soc head screw (4), the second pin (9) being located by a wing nut (5) including a first screw (7); wherein a first blade is placed on the main block (1) and vertically oriented to locate at a rhomboid angle by tightening the blade by the side plates (2, 3), the wing nut (5), and the hexagonal nut (6), and wherein the rhomboid angles are measured for each of the blades to determine co- parallelity of root radius of the blades meant for assembly.