JPS55164706A - Nozzle of steam-turbine - Google Patents

Nozzle of steam-turbine

Info

Publication number
JPS55164706A
JPS55164706A JP7209479A JP7209479A JPS55164706A JP S55164706 A JPS55164706 A JP S55164706A JP 7209479 A JP7209479 A JP 7209479A JP 7209479 A JP7209479 A JP 7209479A JP S55164706 A JPS55164706 A JP S55164706A
Authority
JP
Japan
Prior art keywords
nozzle
plates
hardened
welding
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7209479A
Other languages
Japanese (ja)
Inventor
Hideshi Imatomi
Takashi Ikeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7209479A priority Critical patent/JPS55164706A/en
Publication of JPS55164706A publication Critical patent/JPS55164706A/en
Pending legal-status Critical Current

Links

Landscapes

  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

PURPOSE: To reduce concentration of stress, by forming grooves between plates constituting side walls of the nozzle and welded plates located on the side of an outer ring and an inner ring, in the manner that they are respectively extended in parallel with and perpendicularly to said plates, and thereby preventing influence of welding heat possible exerted to the hardened and coated portion of the nozzle blade surface.
CONSTITUTION: The nozzle blade unit 11 comprises the nozzle blade 12 whose surface is hardened by way of coating at its trailing edge portion of steam passage, the plates 13 constituting the side walls, the welded plates 14 located on the side of the inner ring and the outer ring, and the grooves 15, 16 formed between these two plates 13, 14 respectively in parallel with and perpendicularly to them. When a multiplicity of such nozzle blade units 11 arranged side by side are welded 18 into a semicircular form, influence of heat to the surface-hardened portion of the nozzle blades 12 is reduced greatly by the function of spaces 19 formed by the grooves 15. Further, when the nozzle units 11 thus arranged in the semicircular form are placed at a welding groove portion 20a and fixed to a nozzle steam chamber 20 by welding a structural welding member 21, the grooves 16 serve to prevent occurrence of cracks in the surface-hardened portion of the nozzle blades 12 due to residual stress at the welded portions. Thus, it is enabled to minimize or eliminate undesirable influence by welding that is exerted to the hardened and coated portion of the nozzle blade surface.
COPYRIGHT: (C)1980,JPO&Japio
JP7209479A 1979-06-08 1979-06-08 Nozzle of steam-turbine Pending JPS55164706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7209479A JPS55164706A (en) 1979-06-08 1979-06-08 Nozzle of steam-turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7209479A JPS55164706A (en) 1979-06-08 1979-06-08 Nozzle of steam-turbine

Publications (1)

Publication Number Publication Date
JPS55164706A true JPS55164706A (en) 1980-12-22

Family

ID=13479467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7209479A Pending JPS55164706A (en) 1979-06-08 1979-06-08 Nozzle of steam-turbine

Country Status (1)

Country Link
JP (1) JPS55164706A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744529A1 (en) * 1995-05-22 1996-11-27 General Electric Company Methods for coating and securing multi-vane nozzle segments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744529A1 (en) * 1995-05-22 1996-11-27 General Electric Company Methods for coating and securing multi-vane nozzle segments

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