JP3600267B2 - Steam turbine - Google Patents

Steam turbine Download PDF

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Publication number
JP3600267B2
JP3600267B2 JP08448594A JP8448594A JP3600267B2 JP 3600267 B2 JP3600267 B2 JP 3600267B2 JP 08448594 A JP08448594 A JP 08448594A JP 8448594 A JP8448594 A JP 8448594A JP 3600267 B2 JP3600267 B2 JP 3600267B2
Authority
JP
Japan
Prior art keywords
fixing nut
turbine casing
turbine
pin
nozzle chamber
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.)
Expired - Fee Related
Application number
JP08448594A
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Japanese (ja)
Other versions
JPH07293206A (en
Inventor
浩 小田
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP08448594A priority Critical patent/JP3600267B2/en
Publication of JPH07293206A publication Critical patent/JPH07293206A/en
Application granted granted Critical
Publication of JP3600267B2 publication Critical patent/JP3600267B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【０００１】
【産業上の利用分野】
本発明は、ノズル室の固定ナットを回り止めすることができるようにした蒸気タービンに関する。
【０００２】
【従来の技術】
従来の蒸気タービンにおいては、タービン車室に挿入されたノズル室をタービン車室に固定する固定ナットは、回り止めのためにタービン車室に溶接されていた。即ち、図４に示すように、タービン車室１に設けられた穴１ａを通してタービン車室１にノズル室３を挿入し、固定ナット２によってタービン車室１に固定している。さらに、固定ナット２の蒸気流、振動による抜け出し防止のために、溶接１０によって固定ナット２とタービン車室１を固定している。
【０００３】
【発明が解決しようとする課題】
前記従来の蒸気タービンにおいては、タービン車室１の材料によっては、固定ナット２の溶接が困難で固定ナットと車室の回り止めのための溶接さえ許容されない場合があった。
【０００４】
本発明は、以上の従来の蒸気タービンのもつ問題点を解決しようとするものである。
【０００５】
【課題を解決するための手段】
本発明は、タービン車室にノズル室を挿入し、固定ナットでノズル室をタービン車室に固定した蒸気タービンにおいて、前記固定ナットの外周部に上下方向にピン穴としての半円状の切欠きと前記タービン車室に前記切欠きに相対して穿孔されたピン穴を設け、前記切欠きと前記ピン穴にピンを挿入して前記固定ナットをタービン車室にピン止めした。
【０００６】
【作用】
本発明では、ノズル室をタービン車室に固定する固定ナットの外周部に上下方向にピン穴としての半円状の切欠きとタービン車室に前記切欠きに相対して穿孔されたピン穴を設け、前記切欠きと前記ピン穴にピンを挿入することによって、固定ナットをタービン車室に溶接することなく固定することができ、蒸気流、振動等による固定ナットの抜け出しが防止される。
【０００７】
【実施例】
本発明の一実施例を図１及び図２によって説明する。本実施例は、図４に示す蒸気タービンと同様にノズル室３をタービン車室１の穴１ａよりタービン車室１に挿入し、固定ナット２でノズル室３をタービン車室１に固定している。
【０００８】
固定ナット２の外周部の中心に対して反対側の位置には固定ナット２の上下方向にピン穴としての半円状の２個の切欠き５が設けられ、また、タービン車室１の前記切欠き５に相対する位置には２個のピン穴６が設けられており、ピン４がこの切欠き５とピン穴６に挿入される。
【０００９】
本実施例は以上のように構成されているので、切欠き５とピン穴６に挿入されたピン４によって固定ナット２が回ることが防止され、固定ナット２はタービン車室１に溶接することなく固定ナット２は確実に回り止めされ、蒸気流、振動等によって固定ナット２が抜け出すことが防止される。
【００１０】
また、本実施例において、ピン４の抜け出しを防止するために、図３に示すように、固定ナット２の上部にコーキング７を施すようにすることもできる。
【００１１】
【発明の効果】
本発明は、以上説明したように、溶接が困難または不可能な材料のタービン車室に溶接することなくノズル室を確実に固定させることができ、またこれによって溶接性の難易にとらわれずタービン車室材を選定することができる。
【図面の簡単な説明】
【図１】本発明の一実施例の断面図である。
【図２】同実施例のタービン車室とノズル室の固定部分を示し、図２（ａ）はその平面図、図２（ｂ）はその縦断面図である。
【図３】同実施例において固定ナットに施されたコーキングを示す縦断面図である。
【図４】従来の固定ナットをタービン車室に溶接した蒸気タービンのタービン車室とノズル室の部分の断面図である。
【符号の説明】
１ タービン車室
１ａ タービン車室の穴
２ 固定ナット
３ ノズル室
４ ピン
５ 切欠き
６ ピン穴
７ コーキング[0001]
[Industrial applications]
The present invention relates to a steam turbine in which a fixing nut of a nozzle chamber can be prevented from rotating.
[0002]
[Prior art]
In the conventional steam turbine, a fixing nut for fixing the nozzle chamber inserted into the turbine casing to the turbine casing has been welded to the turbine casing to prevent rotation. That is, as shown in FIG. 4, the nozzle chamber 3 is inserted into the turbine casing 1 through a hole 1 a provided in the turbine casing 1, and is fixed to the turbine casing 1 by a fixing nut 2. Further, the fixing nut 2 and the turbine casing 1 are fixed by welding 10 in order to prevent the fixing nut 2 from coming off due to steam flow and vibration.
[0003]
[Problems to be solved by the invention]
In the conventional steam turbine described above, depending on the material of the turbine casing 1, welding of the fixing nut 2 is difficult, and even welding for preventing the rotation of the fixing nut and the casing may not be permitted.
[0004]
The present invention is to solve the above-mentioned problems of the conventional steam turbine.
[0005]
[Means for Solving the Problems]
According to the present invention, in a steam turbine in which a nozzle chamber is inserted into a turbine casing and the nozzle chamber is fixed to the turbine casing with a fixing nut , a semicircular notch as a pin hole is formed in an outer peripheral portion of the fixing nut in a vertical direction. And a pin hole drilled in the turbine case opposite to the notch , a pin was inserted into the notch and the pin hole , and the fixing nut was pinned to the turbine case.
[0006]
[Action]
In the present invention, a semicircular notch and pin hole drilled relative to the notch in the turbine casing of a pin hole in the vertical direction on the outer peripheral portion of the fixing nut for fixing the nozzle chamber to the turbine casing The fixing nut can be fixed to the turbine casing without welding by inserting the pin into the notch and the pin hole , and the fixing nut is prevented from coming off due to steam flow, vibration, or the like.
[0007]
【Example】
One embodiment of the present invention will be described with reference to FIGS. In this embodiment, similarly to the steam turbine shown in FIG. 4, the nozzle chamber 3 is inserted into the turbine casing 1 through the hole 1a of the turbine casing 1, and the nozzle chamber 3 is fixed to the turbine casing 1 with the fixing nut 2. I have.
[0008]
At the position opposite to the center of the outer periphery of the fixed nut 2, two semicircular notches 5 as pin holes are provided in the vertical direction of the fixed nut 2. Two pin holes 6 are provided at positions facing the notches 5, and the pins 4 are inserted into the notches 5 and the pin holes 6.
[0009]
Since the present embodiment is configured as described above, the fixing nut 2 is prevented from turning by the notch 5 and the pin 4 inserted into the pin hole 6, and the fixing nut 2 is welded to the turbine casing 1. Therefore, the fixing nut 2 is securely prevented from rotating, and the fixing nut 2 is prevented from coming off due to steam flow, vibration, or the like.
[0010]
Further, in this embodiment, in order to prevent the pins 4 from coming off, as shown in FIG.
[0011]
【The invention's effect】
INDUSTRIAL APPLICABILITY As described above, the present invention can securely fix a nozzle chamber without welding to a turbine casing made of a material that is difficult or impossible to weld, and thereby enables a turbine Room material can be selected.
[Brief description of the drawings]
FIG. 1 is a sectional view of one embodiment of the present invention.
2 (a) is a plan view and FIG. 2 (b) is a longitudinal sectional view of a fixed portion between a turbine casing and a nozzle chamber of the embodiment.
FIG. 3 is a longitudinal sectional view showing caulking applied to a fixing nut in the embodiment.
FIG. 4 is a cross-sectional view of a turbine casing and a nozzle chamber of a steam turbine in which a conventional fixing nut is welded to a turbine casing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Turbine casing 1a Hole in turbine casing 2 Fixing nut 3 Nozzle chamber 4 Pin 5 Notch 6 Pin hole 7 Caulking

Claims (1)

タービン車室にノズル室を挿入し、固定ナットでノズル室をタービン車室に固定した蒸気タービンにおいて、前記固定ナットの外周部に上下方向にピン穴としての半円状の切欠きと前記タービン車室に前記切欠きに相対して穿孔されたピン穴を設け、前記切欠きと前記ピン穴にピンを挿入して前記固定ナットをタービン車室にピン止めしたことを特徴とする蒸気タービン。In a steam turbine in which a nozzle chamber is inserted into a turbine casing and the nozzle chamber is fixed to the turbine casing with a fixing nut , a semicircular cutout as a pin hole is formed in an outer peripheral portion of the fixing nut in a vertical direction and the turbine wheel is formed. relative to the notch in the chamber provided with a perforated pin holes, a steam turbine, characterized in that said notch and said fixing nut by inserting the pin into the pin hole and stop pin in the turbine casing.
JP08448594A 1994-04-22 1994-04-22 Steam turbine Expired - Fee Related JP3600267B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP08448594A JP3600267B2 (en) 1994-04-22 1994-04-22 Steam turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08448594A JP3600267B2 (en) 1994-04-22 1994-04-22 Steam turbine

Publications (2)

Publication Number Publication Date
JPH07293206A JPH07293206A (en) 1995-11-07
JP3600267B2 true JP3600267B2 (en) 2004-12-15

Family

ID=13831961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP08448594A Expired - Fee Related JP3600267B2 (en) 1994-04-22 1994-04-22 Steam turbine

Country Status (1)

Country Link
JP (1) JP3600267B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813777A1 (en) * 2006-01-31 2007-08-01 Siemens Aktiengesellschaft Nozzle box fixation

Also Published As

Publication number Publication date
JPH07293206A (en) 1995-11-07

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