| 摘要 |
An aerofoil blade 400 for a turbo machine has a root portion 408 shaped for attachment to the turbo machine, where the blade is formed to define an internal cavity 316 in at least the root portion of the blade. The cavity can extend from the root portion into the blade portion. The blade may include one or more membranes 404 arranged to subdivide the internal cavity in at least the root portion. The blade is manufactured by providing a stacked assembly including a pair of opposing panels each having a root member projecting outward. The assembly is hot formed to form an internal cavity at least in the root portion. The hot forming may use a cavity die and the assembly can be inflated to form the internal cavity. The hot forming may include diffusion bonding and super plastic forming. The assembly may include a membrane sandwiched between the opposing panels an may include a stop off layer for preventing boding in predetermined regions. The fan blade is lighter than prior art fan blades. |
