Lacing hole structure of turbine blade and loose lacing wire installation structure of the same turbine blade
A technology of steam turbine blades and tendon holes, which is applied in the direction of blade support components, mechanical equipment, engine components, etc., can solve the problems of low density of titanium alloy, low vibration deformation of blades, and small centrifugal force, etc., and achieve simple structural shape and reduce stress Level, enhance the effect of vibration damping ability
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[0025] See figure 1 , There are lacing holes processed at about 65% to 80% of the blade height of the steam turbine blade 100, and the annular loose lacing 101 with a circular cross section passes through the lacing hole of the blade to connect the blades to form a complete circle structure.
[0026] See Figure 2a to Figure 3d As shown, in the present invention, a straight circular annular boss structure 1 is processed on the airfoil surface, the axial direction of which is perpendicular to the normal direction of the airfoil cross section and parallel to the tangential direction of the impeller. The outer surface of the boss structure 1 and the blade The intersection of the pressure side and the suction side is a rounded transition. The through hole in the middle of the boss structure 1 is the rib hole 10 of the blade, and its axis direction is consistent with the axis of the boss structure 1. In the actual machining process, use first The drill bit processes the lacing hole 10,...
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