Title:
STEAM TURBINE NOZZLE DEVICE
Document Type and Number:
Japanese Patent JPH01300002
Kind Code:
A
Abstract:
PURPOSE:To prevent the corrosion of the top end of a blade due to the impingement of water droplets by mounting an inner heating pipe or suction pipe of water droplets to each of multiple nozzles made in the hollow structure, and passages of steam are provided at the outside of these nozzles. CONSTITUTION:In a turbine stage structure where nozzles 3, 9 which form passages are mounted on a nozzle diaphragm 2 fixed to a casing 1, and blades 5, 11 which form passages are provided on a wheel 4 that concentrically rotates with the casing 1, the nozzle 9 which is a passage stage of wet steam is made in the hollow structure. A heating pipe 10 made of highly heat-conductive material penetrates the inside of the nozzle 9 along the direction of blade length, and the hollow space between the nozzle 9 and the heating pipe 10 forms a scavenging chamber 22 of water droplets. A recovery hole 12 of water droplets is also provided at the side of the front flow on the blade surface, and connected to the water droplets scavenging chamber 22, and the water droplets recovered thereat are heated by the heating pipe 10, and blasted at a high speed from a steam blasting hole 13 provided at the side of back flow.
Inventors:
MATSUDA MINORU
Application Number:
JP12505788A
Publication Date:
December 04, 1989
Filing Date:
May 24, 1988
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
F01D9/02; (IPC1-7): F01D9/02
Attorney, Agent or Firm:
Noriyuki Noriyuki (1 person outside)