JPS58192904A - Saw-tooth shaped thread - Google Patents
Saw-tooth shaped threadInfo
- Publication number
- JPS58192904A JPS58192904A JP7570582A JP7570582A JPS58192904A JP S58192904 A JPS58192904 A JP S58192904A JP 7570582 A JP7570582 A JP 7570582A JP 7570582 A JP7570582 A JP 7570582A JP S58192904 A JPS58192904 A JP S58192904A
- Authority
- JP
- Japan
- Prior art keywords
- valve casing
- flank
- threaded ring
- casing
- saw
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
Abstract
Description
【発明の詳細な説明】
この発明は蒸気タービンのタービンケーシングからの接
続管と弁ケーシングとを結合するねじリングと弁ケーシ
ングのねじ部などに形成されるのこ歯ねじに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a threaded ring that connects a valve casing to a connecting pipe from a turbine casing of a steam turbine, and a serrated thread formed on a threaded portion of the valve casing.
一般にこの種ののこ歯ねじは、締付は時に芯振れするこ
となく、結合部を密着して締め付けできることが要望さ
れる。In general, it is desired that this type of serrated screw can be tightened so that the joint can be tightly tightened without causing the core to run out.
第１図は蒸気タービ／の弁ケーシングと接続管との結＆
部の６４構成図でおる。図において、弁ケーシングと連
続管とは次のように結合される。Figure 1 shows the connection between the steam turbine valve casing and the connecting pipe.
This is a 64-part configuration diagram. In the figure, the valve casing and the continuous pipe are connected as follows.
Ｕは図示しない蒸気タービンのタービンケーシングから
の接続管、戎は接続管と結合する弁ケーシング、１３は
弁ケーシング１２と接続管１１とを締結する為のねじリ
ング、１４は弁ケーシング戎と接続管１１とを結合する
際の案内用のガイドビン、１５は外径方向の位置決めビ
ン、１６は結合部接触面からの蒸気漏れ防止の為の気密
リングである。弁ケーシング１２と接続管１１との結合
は、ガイドピン１４を案内にして弁ケーシング栽と接続
管１１との接触面を密着させ、位置決めピン１５に挿入
し友後接続管１１儒よりねじリング１３を弁ケーシング
栽のねじ部１γに締め込み、このねじ部１ツとねじリン
グ認の載面１３ａにより接続ｆ１１を弁ケーシング１２
に締結させるようＫしたもので、ねじリング１３と弁ケ
ーシング１２のねじｉｌ ｌ’／とにはのこ歯ねじが形
成されている。U is a connection pipe from a turbine casing of a steam turbine (not shown), a valve casing is connected to the connection pipe, 13 is a threaded ring for connecting the valve casing 12 and the connection pipe 11, and 14 is a valve casing socket and the connection pipe. 11 is a guide pin for guiding the joints, 15 is a positioning pin in the outer radial direction, and 16 is an airtight ring for preventing steam leakage from the joint contact surface. To connect the valve casing 12 and the connecting pipe 11, use the guide pin 14 as a guide to bring the contact surfaces of the valve casing and the connecting pipe 11 into close contact, insert it into the positioning pin 15, and then tighten the threaded ring 13 from the connecting pipe 11. is tightened into the threaded part 1γ of the valve casing, and the connection f11 is connected to the valve casing 12 by this threaded part and the mounting surface 13a of the threaded ring.
The threaded ring 13 and the thread il'/ of the valve casing 12 are provided with sawtooth threads.
第２図は従来の夾施例によるのこ歯ねじを示し第１図Ｐ
部の詳細図である。図において第１図と同じ構成要素の
ものＫは同じ符号を付し、その説明を省略する。ねじリ
ング追と弁ケーシング１２のねじ部１フに形成されたの
こ歯ねじは、互に遊び側フランク２１にフランク角ｇ＋
が形成され、圧力角フランク羽にはフランク角の形成さ
れない構造のものであつ九。Figure 2 shows a conventional serrated screw using a serrated screw and Figure 1P.
FIG. In the figure, components K that are the same as those in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted. The threaded ring and the serrated thread formed on the threaded portion 1 of the valve casing 12 have a flank angle g+ on the play side flank 21.
is formed, and the pressure angle flank blade has a structure in which no flank angle is formed.
このようなのこ歯ねじの構造においては、弁ケーシング
１２とねじリング１３との締付時に、ねじリング１３が
軸と直角の方向へずれ易く、芯振れや接続管ｌｌＫ均一
な締付は力が得られなく気密性が損われるなどの欠点が
あった。In the structure of such a sawtooth screw, when the valve casing 12 and the screw ring 13 are tightened, the screw ring 13 is likely to shift in the direction perpendicular to the axis, and the force may cause center runout and uniform tightening of the connecting pipe. However, there were drawbacks such as a loss of airtightness.
この発明は上記のような欠点を除去し、締付は時の芯振
れをなくシ、結合部の接触面を密層して締付けのできる
のこ歯ねじを提供することを目的とする。It is an object of the present invention to provide a serrated screw which eliminates the above-mentioned drawbacks, eliminates core run-out during tightening, and can be tightened by closely layering the contact surface of the joint.
この発明によれば上記の目的は、遊び＠フランクおよび
圧力側フランクに共にフランク角を形成し、圧力側フラ
ンクのフランク角を比較的小さく５Ｊｆ以下とすること
によシ違せられる。According to the present invention, the above object can be achieved by forming flank angles on both the play side flank and the pressure side flank, and making the flank angle of the pressure side flank relatively small, 5 Jf or less.
以下この発明の実施例を図面にもとづき説明する。＃Ｉ
３図はこの発明の実施例によるのこ歯ねじを示し第１図
Ｐ部の詳細図である。Embodiments of the present invention will be described below based on the drawings. #I
FIG. 3 shows a serrated screw according to an embodiment of the present invention, and is a detailed view of section P in FIG. 1.
図において第１図に示すものと同じ構成要素の４のには
同じ符合を付すことＫよシその説明を省略する。ねじリ
ング１３と弁ケーシング１２のねじ部１７に２いて、遊
び側フランク２１は第２図に示す従来のものと同様にフ
ランクα１を形成するとともに、圧力角１１７ランク３
１に比較的小さいフランク角ａｍ仁の実施例においては
３度を形成し九ことである。In the figure, the same components 4 as shown in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted. The idle side flank 21 of the threaded ring 13 and the threaded portion 17 of the valve casing 12 forms a flank α1 similar to the conventional one shown in FIG.
In an embodiment with a relatively small flank angle of 1 to 3 degrees, it is possible to form 9 degrees.
このようなのこ歯ねじにしたことにより、ねじり／グ１
３と弁ケーシング戎のねじ部１７は互にくさび状に形成
され、締付時にねじリング邦が軸と直角方向く逃けるの
を防ぐことができるとともに１１Ｉｌｉ絖管１１と弁ケ
ーシング認との結合部の接触面は密着して締付けられ、
締付は作業も容易になる。By using such a serrated screw, twist/gr.
3 and the threaded portion 17 of the valve casing are mutually formed into a wedge shape, which can prevent the threaded ring from escaping in the direction perpendicular to the shaft when tightening, and also prevent the threaded pipe 11 from escaping in the direction perpendicular to the shaft. The contact surfaces of the parts are tightly tightened,
Tightening also makes the work easier.
この発明は上記のように、圧力側フランクにわずかなフ
ランク角を形成したことくより、締付は時の芯損れをな
くシ、容易に結合部の密着性が得られ、かつ高圧にも耐
えられるのζ歯ねじを提供することができる。As mentioned above, by forming a slight flank angle on the pressure side flank, this invention eliminates core damage during tightening, easily obtains tightness at the joint, and can withstand high pressure. Can be provided with ζ-tooth screws.
第１図は蒸気タービンの弁ケーシングと連結管との結合
部の要部構成図、Ｊ２図は従来の実ＪＩＩＩＩによるの
こ噌ねじを示し１ｌｌ１図ＰＦ！ｉＡの詳細図、第３図
は本発明の実施例によるのこ歯ねじを示し第１図Ｐ部の
詳細図である。
１１・・・接続管、１２・・・弁ケーシング、１３・・
・ねじリング、１フ・・・弁ケーシングのねじ部、２１
・・・遊び１１１７ランク、２２・・圧力側フランク、
ａｌ、α２・・フランク角。
−１：Figure 1 is a schematic diagram of the main parts of the joint between the valve casing of a steam turbine and a connecting pipe, and Figure J2 shows a conventional saw-tooth screw according to JIII. 1ll1 Figure PF! A detailed view of iA, and FIG. 3 shows a serrated screw according to an embodiment of the present invention, and is a detailed view of section P in FIG. 1. 11... Connection pipe, 12... Valve casing, 13...
・Threaded ring, 1st thread...Threaded part of valve casing, 21
...Play 1117 rank, 22...Pressure side flank,
al, α2...Frank angle. -1:
Claims (1)
と弁ケーシングとを結合するねじリングと弁ケーシング
のねじ部などに形成されるのこ歯ねじにおいて、圧力側
フランクにフランク角を形成し九ことを特徴とするのこ
歯ねじ。 ２、特許請求の範囲第１項記載ののこ膚ねじにおいて、
圧力１１７ランクのフランク角は５度以下とすることを
％黴とするのこ歯ねじ。[Scope of Claims] 1) In a serrated thread formed on a threaded ring connecting a connecting pipe from a JI gas turbine turbine casing and a valve casing, and a threaded portion of the valve casing, a flank on the pressure side flank is used. A serrated screw characterized by forming nine corners. 2. In the saw skin screw according to claim 1,
A serrated screw with a pressure rating of 117 and a flank angle of 5 degrees or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7570582A JPS58192904A (en) | 1982-05-06 | 1982-05-06 | Saw-tooth shaped thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7570582A JPS58192904A (en) | 1982-05-06 | 1982-05-06 | Saw-tooth shaped thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58192904A true JPS58192904A (en) | 1983-11-10 |
Family
ID=13583896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7570582A Pending JPS58192904A (en) | 1982-05-06 | 1982-05-06 | Saw-tooth shaped thread |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58192904A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61236914A (en) * | 1985-02-15 | 1986-10-22 | ジヨ−ジ シ−ブルツク ウイング | Screw fastener and combination of screw fastener |
| JP2015514192A (en) * | 2012-04-02 | 2015-05-18 | ユナイテッド テクノロジーズ コーポレイションＵｎｉｔｅｄ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏｒｐｏｒａｔｉｏｎ | Screw load distribution |
| CN109519227A (en) * | 2018-10-30 | 2019-03-26 | 江苏海事职业技术学院 | A kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe |
-
1982
- 1982-05-06 JP JP7570582A patent/JPS58192904A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61236914A (en) * | 1985-02-15 | 1986-10-22 | ジヨ−ジ シ−ブルツク ウイング | Screw fastener and combination of screw fastener |
| JP2015514192A (en) * | 2012-04-02 | 2015-05-18 | ユナイテッド テクノロジーズ コーポレイションＵｎｉｔｅｄ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏｒｐｏｒａｔｉｏｎ | Screw load distribution |
| CN109519227A (en) * | 2018-10-30 | 2019-03-26 | 江苏海事职业技术学院 | A kind of lamination-type seal device of steam turbine high-pressure gas injection insertion pipe |
| CN109519227B (en) * | 2018-10-30 | 2021-03-19 | 江苏海事职业技术学院 | Laminated sealing device for high-pressure steam inlet insertion pipe of steam turbine |
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