FREQUENCY REGULATION TYPE PIN BANK OF TURBINE BLADE

摘要

PROBLEM TO BE SOLVED: To provide a pin extending between the positive and negative pressure side walls of a hollow gas turbine engine blade 10. SOLUTION: A hollow aerofoil part 12 comprises the positive and negative pressure side walls 16 and 18 laterally disposed at an interval joined to each other along the leading and trailing edges 20 and 22 thereof. A cooling air supply channel 58 radially extending into the aerofoil part comprises the bank 70 of the pin 68 formed integrally with the positive and negative pressure side walls and laterally extending between the positive and negative pressure side walls. The band of the pin is adjusted so that the natural frequency resonance of the blade can be substantially avoided in operating an engine in a steady state by sufficiently separating the natural frequency of the blade related to the engine force-driving mode of the blade 10 from an engine operating frequency in the steady state. The bank of the pin is adjusted by the installation position of the pin in a cooling air channel. COPYRIGHT: (C)2005,JPO&NCIPI