cover element for complex and dipalette ribbed rotor turbine

摘要

The cover piece includes a single integral sealing rib 17 extending radially from its outer surface towards the surrounding housing. Each cover piece interconnects the outer tips 19 of adjacent rotor buckets 13, the adjacent ribs 17 being tangentially aligned with respect to each other to form, in one embodiment, a substantially continuous, radially extending, ring 21 about the turbine stage. IMAGE