Welded rotor, a steam turbine having a welded rotor and a method for producing a welded rotor

摘要

A welded rotor, a steam turbine having a welded rotor, and a method of producing a welded rotor are disclosed. The welded rotor includes a high pressure section and an intermediate pressure section. The high pressure section includes a high temperature material section joined to a low temperature material section.

主权项

1. A rotor, comprising:
a high pressure section having a first end and a second end and a high pressure casing, the second end extending beyond the high pressure casing; and an intermediate pressure section mechanically joined at a shaft of the rotor to the second end of the high pressure section, the intermediate pressure section having an intermediate pressure casing; wherein the high pressure section comprises
a high temperature material section formed of a high temperature material, and having a first end and a second end opposite thereof;a first low temperature material section formed of a first low temperature material, the first low temperature material section joined to the first end of the high temperature material section at a first joint; anda second low temperature material section formed of a second low temperature material, the second low temperature material section joined to the second end of the high temperature material at a second joint, the second joint being within the high pressure section;wherein the first joint is located within the high pressure section on the rotor at a position along a high pressure main steam flow path at or adjacent a blade secured to the rotor.