JPS6098196A - Labyrinth seal device for centrifugal type impeller - Google Patents

Labyrinth seal device for centrifugal type impeller

Info

Publication number
JPS6098196A
JPS6098196A JP20477683A JP20477683A JPS6098196A JP S6098196 A JPS6098196 A JP S6098196A JP 20477683 A JP20477683 A JP 20477683A JP 20477683 A JP20477683 A JP 20477683A JP S6098196 A JPS6098196 A JP S6098196A
Authority
JP
Japan
Prior art keywords
labyrinth seal
impeller
seal
gap
casing
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
JP20477683A
Other languages
Japanese (ja)
Inventor
Haruki Sakai
酒井 春樹
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP20477683A priority Critical patent/JPS6098196A/en
Publication of JPS6098196A publication Critical patent/JPS6098196A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent the contact of a labyrinth seal section which is used for a centrifugal impeller in a fluid machine such as, for example, blowers, compressors, etc., due to vibration of a rotor shaft, by making the labyrinth seal section movable automatically in association with the discharge pressure so that the gap of the labyrinth seal section is made large upon starting. CONSTITUTION:A labyrinth seal 18 having a surface 18a which is opposed to a surface 12 of a side plate 12 of an impeller 11 perpendicular to a rotor shaft 13 and is formed therein with sealing teeth, is formed in its intermediate section with a recess part 18b, and comprises a spring 21 disposed between itself and a projecting section 10a of a casing 10. On the side opposite to the surface 18a of the labyrinth seal 18 there is provided a pressure chamber 16 into which the discharge pressure in a scroll 15 is effected. Since the discharge pressure is low upon starting, the labyrinth seal 18 is moved by the spring 21 in the direction in which the gap of the labyrinth seal 18 increases. However, since the discharge pressure becomes high upon steady state operation, the labyrinth seal moves overcoming the spring 21 in the direction in which the gap decreases.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は送風機、圧縮機などの流体機械の遠心羽根車に
使用されるラビリンスシール装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a labyrinth seal device used in a centrifugal impeller of a fluid machine such as a blower or a compressor.

〔発明の背景〕[Background of the invention]

従来のこの種ラビリンスシール装置は、第1図および第
2図に示すとおりである。すなわち第1図に示すシール
装置では、ケーシングl内にロータ軸4に取付けられた
羽根車2を回転自在に収納し、この羽根車2の側板3の
ロータ軸4と垂直な面に対向するように、ケーシング1
にラビリンスシール装置5が固定されている。
A conventional labyrinth seal device of this type is shown in FIGS. 1 and 2. That is, in the sealing device shown in FIG. 1, an impeller 2 attached to a rotor shaft 4 is rotatably housed in a casing l, and a side plate 3 of the impeller 2 is arranged so as to face a surface perpendicular to the rotor shaft 4. , casing 1
A labyrinth seal device 5 is fixed to.

一方、第2図に示すシール装置では、前記側板3の軸4
と平行な面に対向するように、ケーシング゛1にラビリ
ンスシール装置6が固定さJしると共に、各板7のロー
タ軸4に垂直な面と対向するように、ケーシング1にラ
ビリンスシール装置5が固定されている。
On the other hand, in the sealing device shown in FIG.
A labyrinth seal device 6 is fixed to the casing 1 so as to face a plane parallel to the rotor axis 4, and a labyrinth seal device 5 is fixed to the casing 1 so as to face a plane perpendicular to the rotor axis 4 of each plate 7. is fixed.

」1記ラビリンスシール装置5,6では、そのシール歯
の先端と相手側、すなわち側F7.4および各板7との
間のギャップは性能に大きな影響を及ぼすので、このシ
ールギャップは極力小さいことが望ましい。
In the labyrinth seal devices 5 and 6 mentioned above, the gap between the tip of the seal tooth and the mating side, that is, the side F7.4 and each plate 7, has a large effect on performance, so this seal gap should be as small as possible. is desirable.

一方、流体機械の起動時には、ロータ軸は太きな振動を
生ずるため、前記シールギャップが過小であると、羽根
車はシール歯に接触して事故を起す恐れがある。また、
前記のように従来のラビリンスシール装置は、ケーシン
グに固定さJ−しているため、ラビリンスシールのギャ
ップは一定であるから、任意に調整することができない
欠点があった。
On the other hand, when the fluid machine is started, the rotor shaft generates strong vibrations, so if the seal gap is too small, the impeller may come into contact with the seal teeth, causing an accident. Also,
As mentioned above, since the conventional labyrinth seal device is fixed to the casing, the gap of the labyrinth seal is constant and cannot be adjusted arbitrarily.

〔発明の目的〕[Purpose of the invention]

本発明は上記のような従来の欠点を解消し、流体機械の
起動時にはシールギャップを大きくし、定格運転時には
シールギャップを最小に保つよう、そのシールギャップ
を自動的に調整させることを目的とするものである。
The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks, and to automatically adjust the seal gap so that the seal gap is enlarged when the fluid machine starts up and kept at a minimum during rated operation. It is something.

〔発明の概要〕[Summary of the invention]

本発明は上記目的を達成するために、遠心羽根車の軸と
垂直方向の面にシール歯を任意数連設したラビリンスシ
ールをケーシング内に設けてなるラビリンスシール装置
において、そのラビリンスシールを軸方向に移動可能に
設けると共に、そのラビリンスシールの背面に前記羽根
車の吐出側圧力を、この−背面と反対側の中間面にばね
圧力をそれぞ九作用させ、前記面圧力によりラビリンス
シールのギャップを、前記羽根車の起動および定格運転
に応じてそれぞれ自動的に調整するようにしたことを特
徴とするものである6 〔発明の実施例〕 以4;、本発明の一実施例を図面についで説明する。
In order to achieve the above object, the present invention provides a labyrinth seal device in which a labyrinth seal in which an arbitrary number of seal teeth are arranged in series on a surface perpendicular to the axis of a centrifugal impeller is provided in a casing. At the same time, the pressure on the discharge side of the impeller is applied to the back surface of the labyrinth seal, and the spring pressure is applied to the intermediate surface opposite to the back surface, and the gap of the labyrinth seal is closed by the surface pressure. , is characterized in that the impeller is automatically adjusted in accordance with the startup and rated operation of the impeller.6 [Embodiments of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. explain.

第3図ないし第5図において、10はゲージング、11
はロータ軸13に固着され、ケーシング10内に回転自
在に収納された羽根車、14は羽根車11の吐出側に設
けられたティフユーザ、15はケーシング10内に、か
つディフューザ15の出口側に設けられたスクロール、
1Gはゲージング10の入口側に設けられた圧力室、1
7は前記スクロール15と圧力室16とを連絡する導管
、18は前記圧力室16内にOリング20a。
In Figures 3 to 5, 10 is gauging, 11 is
is an impeller fixed to the rotor shaft 13 and rotatably housed within the casing 10; 14 is a tiff user provided on the discharge side of the impeller 11; and 15 is an impeller provided within the casing 10 and on the outlet side of the diffuser 15. scroll provided,
1G is a pressure chamber provided on the inlet side of gauging 10;
7 is a conduit connecting the scroll 15 and the pressure chamber 16; 18 is an O-ring 20a in the pressure chamber 16;

20bを介しでロータ軸13方向に移動可能に収納され
たラビリンスシール(以下シールと称す)である。
This is a labyrinth seal (hereinafter referred to as a seal) that is housed so as to be movable in the direction of the rotor shaft 13 via the shaft 20b.

上記シール18は、その一方何すなわち羽根車側板12
のロータ軸13に垂直な面12aと対向する面18aに
、シール歯19が任膚:数連設されており、かつ、中間
部に四部18bが設けられている。21は前記凹部18
bの左側端面Aとケーシング10の前記四部18b内へ
の突出部]Oaの左側端面Cとの間に介設さ肛たばねで
ある。
The seal 18 has one side, that is, the impeller side plate 12.
On the surface 18a facing the surface 12a perpendicular to the rotor shaft 13, several seal teeth 19 are arranged in series, and four portions 18b are provided in the middle. 21 is the recess 18
This is a spring interposed between the left end surface A of Oa of the casing 10 and the left end surface C of the casing 10 protruding into the four parts 18b.

次に上記のような措成から)jる木実施例の作用につい
て説明する。
Next, the operation of the tree embodiment as described above will be explained.

ケーシング10の入口から流入した流体22は、羽根車
1」により打圧し・て吐出さオシ、さらにディフューザ
14およびスクロール15を経て所定部器へ送られる。
The fluid 22 that has flowed in from the inlet of the casing 10 is compressed and discharged by the impeller 1'', and then sent to a predetermined device via the diffuser 14 and scroll 15.

この場合、シールj8は羽根車】】から吐出さ汎た高圧
流体の一部が、ケーシング10と側板12との間の間隙
23を流通して羽根車11の入口側に戻入するのを極力
防ぎ、羽根Jjj、+1の性能が低下するのを防止する
作用をする。
In this case, the seal j8 prevents as much as possible a part of the high-pressure fluid discharged from the impeller from flowing through the gap 23 between the casing 10 and the side plate 12 and returning to the inlet side of the impeller 11. , blade Jjj, +1 from deteriorating in performance.

流体機械の羽根車11の起動時に1し、第4図に示すよ
うにシール18は、ばね21のばね力Paにより矢印方
向(左方向)に押圧されて移動するため、側板12の垂
直面12aとシール面18aのシール歯19との間のギ
ャップDは十分に大きい状態に保持されている。したが
って、起動時にロータ軸13の振動により、側板12の
シール部分に大きな振幅が発生しても、そのシール面1
2aはシール歯19に接触する恐れはないから安全に起
動させることができる。
1 when the impeller 11 of the fluid machine is started, and as shown in FIG. The gap D between the seal tooth 19 of the seal surface 18a and the seal tooth 19 of the seal surface 18a is maintained in a sufficiently large state. Therefore, even if a large amplitude occurs in the seal portion of the side plate 12 due to the vibration of the rotor shaft 13 during startup, the seal surface 1
2a can be activated safely since there is no risk of contacting the seal teeth 19.

一方、定格運転時に羽根車11が定格回転数に達して、
吐出流体が所定仕様の圧力まで上昇すると、この高圧の
流体は導管17を経てケーシングlOの圧力室16に導
入される。この圧力室16内に心入された高圧流体は第
5図に示すように、シールIBの背面を圧力pbでばね
圧Pa(Pa<P L+)に抗して矢印方向(右方向)
に押圧するのでシール18の中間凹部18bの左側面A
がケーシングIOの突出部の左側面■3と接触するまで
シール18は右方向に移動し、そのシール歯19と側板
12のシール面12aとの間のギャップdは最小寸法に
保持される。
On the other hand, when the impeller 11 reaches the rated rotation speed during rated operation,
Once the pressure of the discharged fluid has increased to a predetermined specification, this high pressure fluid is introduced into the pressure chamber 16 of the casing IO via the conduit 17. As shown in FIG. 5, the high-pressure fluid inserted into the pressure chamber 16 presses against the back surface of the seal IB at a pressure pb in the direction of the arrow (rightward) against the spring pressure Pa (Pa<P L+).
The left side surface A of the intermediate recess 18b of the seal 18
The seal 18 moves rightward until it comes into contact with the left side surface (3) of the protrusion of the casing IO, and the gap d between its seal teeth 19 and the seal surface 12a of the side plate 12 is maintained at its minimum dimension.

この場合、ロータ軸はすでに定格回転に達して安定して
いるため、羽根車は大幅に振動する恐れはないのe、シ
ールギャップが僅小であつ°Cも、シールC付と側板の
シール面との接触を阻止することができる。
In this case, the rotor shaft has already reached its rated rotation and is stable, so there is no risk of the impeller vibrating significantly.The seal gap is very small and the sealing surface of the side plate is contact can be prevented.

さらに、羽根車の停止時には吐出側圧力が低下するため
、ケーシングの圧力室16内の圧力も低下するから、こ
の圧力にばね21の力が打勝ってシール18を左方向に
移動させるので、シールギャップ[)は再び第4図に示
すように+5)に人さいihf状態に吊持される。した
がつ°C1羽根車の停止時しり一タtli+!Iが振動
しても、側板のシール面がラビリンスのシール歯と接触
する恐れはないから安全な停止が可能である。
Furthermore, when the impeller is stopped, the pressure on the discharge side decreases, and the pressure inside the pressure chamber 16 of the casing also decreases, so the force of the spring 21 overcomes this pressure and moves the seal 18 to the left. The gap [) is again suspended in the ihf state at +5) as shown in FIG. However, when the C1 impeller stops, it is tli+! Even if I vibrates, there is no risk that the seal surface of the side plate will come into contact with the seal teeth of the labyrinth, so a safe stop is possible.

(究明の効果〕 以−1−説明したよ′)に本発明によれば、流体機械の
起動11.1および(’?止時にロータ酎が大幅に振動
した場合でも、ラビリンスシールと羽根車とが接触する
恐れはないから、安全性を向−トさせることができる。
(Effects of the Investigation) As explained above, according to the present invention, even if the rotor vibrates significantly during starting and stopping of the fluid machine, the labyrinth seal and impeller Since there is no risk of contact between the two, safety can be improved.

また、定格運転11!iには、高圧流体の吐出圧によリ
シールギャップを最小限に保持することにより、高圧流
体の瀦洩爪を大幅に低減させて性能の向上をはかること
ができる。
Also, rated operation 11! (i) By keeping the reseal gap to a minimum using the discharge pressure of the high-pressure fluid, it is possible to significantly reduce the leakage claw of the high-pressure fluid and improve performance.

【図面の簡単な説明】[Brief explanation of drawings]

第1図および!PJ2図は従来のラビリンスシール装[
ii fflえる羽根車の上半部断面図、153図は本
発明のラビリンスシール装置の一実施例を適用した羽根
車の上半部断面図、第4図および第5図は日実施例の起
動時および運転時における作動状態をそれぞれ示す断面
図である。 11・・・羽根車、13・・・ロータ軸、16・・・圧
力室、18・・・ラビリンスシール、18a・・シール
面、181)・・・中間凹部、19・・・シールv:;
t、21・・・ばね、D、d・・・ギャップ。 第 1 図 “zZ 図 ■3図
Figure 1 and! PJ2 diagram shows the conventional labyrinth seal installation [
ii FIG. 153 is a sectional view of the upper half of an impeller to which an embodiment of the labyrinth seal device of the present invention is applied, and FIGS. FIG. 4 is a cross-sectional view showing the operating states at the time of operation and at the time of operation, respectively. 11... Impeller, 13... Rotor shaft, 16... Pressure chamber, 18... Labyrinth seal, 18a... Seal surface, 181)... Intermediate recess, 19... Seal v:;
t, 21... spring, D, d... gap. Figure 1 “zZ Figure■3 Figure

Claims (1)

【特許請求の範囲】[Claims] 遠心羽根車の軸と垂直方向の面にシール歯を任意数連設
したラビリンスシールをケーシング内に設けてなるラビ
リンスシール装置において、そのラビリンスシールを前
記軸方向に移動可能に設けると具に、そのラビリンスシ
ールの背面に前記羽根車の吐出側圧力を、この背面と反
対側の中rfTI面にばね圧力をそれぞれ作用させ、前
記側圧力によりラビリンスシールのギャップを、前記羽
根車の起動および定格運転に応じてそれぞれ自動的に調
整するようにしたことを特徴とする遠心羽根車のラビリ
ンスシール装置。
In a labyrinth seal device in which a labyrinth seal having an arbitrary number of seal teeth arranged in series on a surface perpendicular to the axis of a centrifugal impeller is provided in a casing, the labyrinth seal is provided movably in the axial direction. The discharge side pressure of the impeller is applied to the back surface of the labyrinth seal, and the spring pressure is applied to the middle rfTI surface opposite to this back surface, and the gap in the labyrinth seal is controlled by the side pressure to the startup and rated operation of the impeller. A labyrinth seal device for a centrifugal impeller, characterized in that it automatically adjusts according to the respective conditions.
JP20477683A 1983-11-02 1983-11-02 Labyrinth seal device for centrifugal type impeller Pending JPS6098196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20477683A JPS6098196A (en) 1983-11-02 1983-11-02 Labyrinth seal device for centrifugal type impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20477683A JPS6098196A (en) 1983-11-02 1983-11-02 Labyrinth seal device for centrifugal type impeller

Publications (1)

Publication Number Publication Date
JPS6098196A true JPS6098196A (en) 1985-06-01

Family

ID=16496156

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20477683A Pending JPS6098196A (en) 1983-11-02 1983-11-02 Labyrinth seal device for centrifugal type impeller

Country Status (1)

Country Link
JP (1) JPS6098196A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103398020A (en) * 2013-08-15 2013-11-20 长沙山水节能研究院有限公司 Water pump wear-ring sealing device and wear-ring thereof
JP2017141821A (en) * 2016-02-11 2017-08-17 ゼネラル・エレクトリック・カンパニイ Centrifugal compressor assembly for use in turbine engine and method of assembly thereof
KR20190008368A (en) 2016-06-22 2019-01-23 가부시키가이샤 고베 세이코쇼 Labyrinth seal
KR20190046970A (en) 2016-10-13 2019-05-07 가부시키가이샤 고베 세이코쇼 Labyrinth seal
KR20190046969A (en) 2016-10-13 2019-05-07 가부시키가이샤 고베 세이코쇼 Labyrinth seal
CN110873060A (en) * 2018-08-29 2020-03-10 广东德昌电机有限公司 Pump body

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103398020A (en) * 2013-08-15 2013-11-20 长沙山水节能研究院有限公司 Water pump wear-ring sealing device and wear-ring thereof
JP2017141821A (en) * 2016-02-11 2017-08-17 ゼネラル・エレクトリック・カンパニイ Centrifugal compressor assembly for use in turbine engine and method of assembly thereof
CN107061344A (en) * 2016-02-11 2017-08-18 通用电气公司 Centrifugal compressor component and assemble method for turbogenerator
US10227879B2 (en) 2016-02-11 2019-03-12 General Electric Company Centrifugal compressor assembly for use in a turbine engine and method of assembly
US11035472B2 (en) 2016-06-22 2021-06-15 Kobe Steel, Ltd. Labyrinth seal
KR20190008368A (en) 2016-06-22 2019-01-23 가부시키가이샤 고베 세이코쇼 Labyrinth seal
DE112017003122T5 (en) 2016-06-22 2019-03-07 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) labyrinth seal
KR20190046970A (en) 2016-10-13 2019-05-07 가부시키가이샤 고베 세이코쇼 Labyrinth seal
DE112017005191T5 (en) 2016-10-13 2019-07-04 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) labyrinth seal
DE112017005203T5 (en) 2016-10-13 2019-07-04 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) labyrinth seal
US11002364B2 (en) 2016-10-13 2021-05-11 Kobe Steel, Ltd. Labyrinth seal
KR20190046969A (en) 2016-10-13 2019-05-07 가부시키가이샤 고베 세이코쇼 Labyrinth seal
US11085541B2 (en) 2016-10-13 2021-08-10 Kobe Steel, Ltd. Labyrinth seal
CN110873060A (en) * 2018-08-29 2020-03-10 广东德昌电机有限公司 Pump body

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