Title:
TURBINE ROTOR
Document Type and Number:
Japanese Patent JPS60147501
Kind Code:
A
Abstract:
PURPOSE:To enhance the reliability and life to turbine as well as simply reclaim a rotor by a method in which the padding of a material whose thermal expansion coefficient is smaller than the base material of the rotor is provided on the surface of the turbine rotor. CONSTITUTION:A surface 19 as shown by surface contours 19a and 19b is provided for the surface of the rotor 13 in the high- and medium pressure stage 1 in high- and medium pressure steam turbines. The basal portion of a disc, as shown by a round mark A, is shaped into a circular arc form with an intention of relieving the concentration of stress. In this case, the surface contours 19a and 19b and the circular arc-shaped portion are made of paddings 18a-18c of a proper thickness formed from the contour 20, as shown by the oblique line. The material of the padding is high-Cr steels such as 12 Cr-steel, etc., in the case where the base material of the rotor 13 is a low-Cr steel such as Cr-Mo-V steels, etc., having a smaller thermal expansion coefficient than the base material of the rotor 13.
Inventors:
TORITANI HAJIME
SHIBASHITA NAOAKI
SHIBASHITA NAOAKI
Application Number:
JP186584A
Publication Date:
August 03, 1985
Filing Date:
January 11, 1984
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B23K9/04; F01D5/02; F01D25/00; (IPC1-7): F01D5/02
Domestic Patent References:
| JPS56139801U | 1981-10-22 | |||
| JPS5799207A | 1982-06-19 | |||
| JPS599127A | 1984-01-18 | |||
| JPS599129A | 1984-01-18 |
Attorney, Agent or Firm:
Masami Akimoto
Previous Patent: JPS60147500
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