Water turbine runner or pump water turbine runner and manufacturing method for the same

摘要

WATER TURBINE RUNNER OR PUMP WATER TURBINE RUNNER AND MANUFACTURING METHOD FOR THE SAME According to an embodiment, a stub constituting a runner vane end portion including a base R portion of the runner vane is integrally provided to at least one of a crown and a band. A runner vane portion which is a portion of the runner vane except the runner vane end portion is made separately from the crown and the band, and the runner vane portion is welded to the stub. The stub and the runner vane portion welded to each other is configured such that a thickness of an end portion of at least one of the stub and the runner vane portion is larger than a thickness of an end portion of the other of the stub and the runner vane portion, and a bevel groove is provided on an end surface of the other of the stub and the runner vane portion.