JPH0438140A - Labyrinth seal unit - Google Patents
Labyrinth seal unitInfo
- Publication number
- JPH0438140A JPH0438140A JP14222490A JP14222490A JPH0438140A JP H0438140 A JPH0438140 A JP H0438140A JP 14222490 A JP14222490 A JP 14222490A JP 14222490 A JP14222490 A JP 14222490A JP H0438140 A JPH0438140 A JP H0438140A
- Authority
- JP
- Japan
- Prior art keywords
- labyrinth seal
- shaft
- holder
- shape memory
- seal piece
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 14
- 230000035515 penetration Effects 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910000846 In alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
Description
この発明は、回転機械の軸貫通部からの流体の洩れを防
止するラビリンスシール装置に関する。The present invention relates to a labyrinth seal device that prevents fluid from leaking from a shaft penetrating portion of a rotating machine.
ラビリンスシール装置は、回転機械の軸貫通部から潤滑
油または蒸気などが洩れないように、回転部側の軸及び
この軸に対向する固定部側の保持器に、軸方向に複数の
ラビリンスシール片を植え込んでいるが、軸に取付けた
ラビリンスシール片の外径が保持器に植え込んだラビリ
ンスシール片の内径よりも大きいので、組立のときは、
ケーシングに取付けられた保持器を２つ割りに構成して
外径側から保持器を被せて位置決めしていた。Labyrinth seal devices are equipped with a plurality of labyrinth seal pieces in the axial direction on the shaft of the rotating part and the retainer on the fixed part facing this shaft to prevent lubricating oil or steam from leaking from the shaft penetrating part of the rotating machine. However, the outer diameter of the labyrinth seal piece attached to the shaft is larger than the inner diameter of the labyrinth seal piece attached to the retainer, so when assembling,
The cage attached to the casing was divided into two parts, and the cage was positioned from the outer diameter side.
従来のラビリンスシール装置は、ラビリンスシール片が
回転部及び固定部にそれぞれ半径方向に放射状に突出し
ているため、軸貫通部を構成する保持器は２つ割り構造
とし、再組立ができるようにする必要があった。このた
め、保持器の構造が複雑でかつ軸貫通部の組立に手間が
かかった。
この発明は、回転機械の軸貫通部の固定部側の保持器を
分割することなく、一体に構成したラビリンスシール装
置を提供することを目的とする。In conventional labyrinth seal devices, the labyrinth seal pieces protrude radially in the rotating and fixed parts, respectively, so the retainer that makes up the shaft penetration part is divided into two parts so that it can be reassembled. There was a need. For this reason, the structure of the cage was complicated and it took time and effort to assemble the shaft penetrating portion. SUMMARY OF THE INVENTION An object of the present invention is to provide a labyrinth seal device in which a retainer on a fixed part side of a shaft penetrating part of a rotating machine is integrated without being divided.
上記目的は、回転機械の軸及びこの軸を囲んでケーシン
グに取付けられ一体に形成された保持器にそれぞれ複数
のラビリンスシール片を備え、このラビリンスシール片
により軸貫通部をシールするラビリンスシール装置にお
いて、前記ラビリンスシール片を形状記憶合金により構
成することによって達成される。The above object is to provide a labyrinth seal device in which a shaft of a rotating machine and a retainer that is integrally formed and attached to a casing surrounding this shaft are each equipped with a plurality of labyrinth seal pieces, and the labyrinth seal pieces seal a shaft penetrating part. This is achieved by constructing the labyrinth seal piece from a shape memory alloy.
この発明によれば、軸貫通部の軸に植え込むラビリンス
シール片及び保持器に植え込むラビリンスシール片を形
状記憶合金により構成し、軸及び保持器にそれぞれ植え
込んだラビリンスシール片を冷却して軸方向に曲げてお
き、ラビリンスシール片を植え込んだ保持器を軸方向か
ら軸に挿入して軸貫通部を組立て、その後加熱された流
体により軸貫通部を加熱すれば、ラビリンスシール片は
記憶された元の形になり、放射状に半径方向に突出する
ので、軸貫通部をシールすることができる。According to this invention, the labyrinth seal pieces implanted in the shaft of the shaft penetrating portion and the labyrinth seal pieces implanted in the retainer are made of a shape memory alloy, and the labyrinth seal pieces implanted in the shaft and the retainer are cooled and axially moved. If the shaft penetrating part is assembled by bending the cage and inserting the labyrinth seal piece into the shaft from the axial direction, and then heating the shaft penetrating part with heated fluid, the labyrinth seal piece will return to its memorized original state. It is shaped and projects radially in a radial manner so that the shaft penetration can be sealed.
以下図に基づいて、この発明の詳細な説明する。第１図
はこの発明の実施例によるラビリンスシール片を保持器
及び軸に取付けた状態を示す要部断面図、第２図は第１
図のラビリンスシール片によりラビリンスシール装置を
組立てた状態を示す要部断面図である。第１図において
、保持器３に形状記憶合金からなる複数の固定部側ラビ
リンスシール片１を植え込み、かつ軸４に形状記憶合金
からなる複数の回転部側ラビリンスシール片２を植え込
んで、固定部側ラビリンスシール片１及び回転部側ラビ
リンスシール片２を冷却して図のごとく軸方向に曲げる
。保持器３は一体に構成されている。
形状記憶合金は、例えばＮ、−Ｔ、合金がらなり、−旦
ある形状を記憶させいろいろな形に変形して適当な温度
に加熱してやると、変形前の形に戻る性質を持っている
。形状記憶効果を示すＮ。
−Ｔ、合金は、ニッケルとチタンを原子の数で同量ずつ
、つまり原子比１：１で含む合金である。
ニッケルとチタンは比重が違うので、重量比だとＮ８５
５％、Ｔ、４５％になる。
形状記憶合金の本質的な特徴の第１は、きわめて大きな
回復力にある。実用形状記憶合金の一つであるＮ、−Ｔ
、合金では、応力にして５０ｋｇｆ／ａｍ”以上の形状
回復を発生するし、ロボットやアクチュエータのように
数多く繰返し動作する場合でも、１０ｋｇｆ ／ｌａｍ
２程度の回復力を量できる。
形状記憶合金の第２の特徴は、繰返し動作にある。
形状記憶合金の示す形状回復動作は、基本的には１方向
性とよばれる比可逆的な現象である。適当な形状に記憶
された合金を低温で変形した後、定温度以上に加熱する
と元の形に戻るが、これを再び低温にしても、以前に低
温側で変形したときの形にはならない。以前の低温での
形にするには、再び適当な方法で合金を変形する必要が
ある。これに対して、２方向性とよばれる可逆的な動作
の場合は、合金が高温側と低温側の両方の形状を記憶し
ていて、温度の上下にしたがって高低温側それぞれの形
状に繰返し変化する。２方同性の動作特性を得る方法と
しては、合金に高速熱処理などの特殊な熱処理を施して
、合金そのものの動作を２方向性にする方法と、合金自
体は１方向性のものを使い、ばねなどの部品と組合わせ
て、組上がった素子全体として２方同性の動作をさせる
２通りがある。しかし、合金自体の２方向性記憶素子効
果は、実用上の問題がありあまり使われていない。従っ
て、この発明では、ラビリンスシール片１．２には、１
方向性のものを用いる。
つぎに、一体に構成された保持器３を固定部側ラビリン
スシール片１を折り曲げた状態で、右側から軸１に軸方
向に挿入し、所定の位置に固定する。このようにして構
成された軸貫通部に加熱された潤滑油または蒸気などを
通すと、保持器３及び軸４が加熱され、さらに固定部側
ラビリンスシール片１及び回転部側ラビリンスシール片
２が加熱されて、元の形状になり半径方向に突出する。
ｙ′このため固定部側ラビリンスシール片１及び回転部
側ラビリンスシール片２により、軸貫通部をシールする
ことができる。The present invention will be described in detail below based on the drawings. FIG. 1 is a cross-sectional view of a main part showing a state in which a labyrinth seal piece according to an embodiment of the present invention is attached to a cage and a shaft, and FIG.
FIG. 3 is a cross-sectional view of a main part showing a state in which the labyrinth seal device is assembled using the labyrinth seal pieces shown in the figure. In FIG. 1, a plurality of fixed part side labyrinth seal pieces 1 made of a shape memory alloy are implanted in the retainer 3, and a plurality of rotating part side labyrinth seal pieces 2 made of a shape memory alloy are implanted in the shaft 4. The side labyrinth seal piece 1 and the rotating part side labyrinth seal piece 2 are cooled and bent in the axial direction as shown in the figure. The cage 3 is integrally constructed. Shape memory alloys are made of, for example, N, -T, alloys, and have the property of memorizing a certain shape, deforming it into various shapes, and then returning to the shape before the deformation when heated to an appropriate temperature. N showing shape memory effect. -T, alloy is an alloy containing equal amounts of nickel and titanium in terms of number of atoms, that is, in an atomic ratio of 1:1. Nickel and titanium have different specific gravity, so the weight ratio is N85.
5%, T, 45%. The first essential feature of shape memory alloys is their extremely high resilience. N, -T, one of the practical shape memory alloys
In alloys, shape recovery occurs at a stress of 50 kgf/am or more, and even when the motion is repeated many times such as in robots and actuators, the stress is 10 kgf/lam.
Can measure recovery power of about 2. The second feature of shape memory alloys is their repeatability. The shape recovery behavior exhibited by shape memory alloys is basically a reversible phenomenon called unidirectionality. If an alloy that has memorized an appropriate shape is deformed at a low temperature and then heated above a certain temperature, it will return to its original shape, but even if the temperature is lowered again, it will not return to the shape it was in when it was previously deformed at a low temperature. The alloy must be deformed again in a suitable manner to return to its previous low-temperature shape. On the other hand, in the case of reversible behavior called bidirectionality, the alloy remembers the shape of both the high temperature side and the low temperature side, and repeatedly changes to the shape of each high and low temperature side as the temperature rises and falls. do. There are two ways to obtain two-way isotropic operating characteristics: one is to subject the alloy to special heat treatment such as high-speed heat treatment to make the alloy itself two-directional, and the other is to use a unidirectional alloy and create a spring. There are two ways to make the assembled device as a whole perform two-way homogeneous operation by combining with other components. However, the bidirectional memory element effect of the alloy itself has practical problems and is not often used. Therefore, in this invention, the labyrinth seal piece 1.2 includes 1
Use a directional one. Next, with the fixed part side labyrinth seal piece 1 bent, the integrated retainer 3 is inserted into the shaft 1 from the right side in the axial direction and fixed at a predetermined position. When heated lubricating oil or steam is passed through the shaft penetrating portion configured in this manner, the retainer 3 and shaft 4 are heated, and the labyrinth seal piece 1 on the fixed part side and the labyrinth seal piece 2 on the rotating part side are heated. It is heated and assumes its original shape and protrudes radially. y' Therefore, the shaft penetrating portion can be sealed by the stationary part side labyrinth seal piece 1 and the rotating part side labyrinth seal piece 2.
この発明によれば、軸貫通部の固定部側ラビリンスシー
ル及び回転部側ラビリンスシールを形状記憶合金で構成
するので、一体に形成された保持器及び軸にそれぞれ植
え込んだラビリンスシール片を冷却して軸方向に曲げて
おき、保持器を軸方向に挿入して所定の位置に組立て、
軸貫通部に加熱された流体を通すと、ラビリンスシール
片は元の記憶された形状に戻って半径方向に突出し、隙
間をシールすることができる。従って保持器は２つ割り
構造にする必要がなく、一体のまま組立てることができ
るので、構造が簡単となり、かつ組立作業を容易にする
ことができる。According to this invention, since the fixed part side labyrinth seal and the rotating part side labyrinth seal of the shaft penetrating part are made of a shape memory alloy, the labyrinth seal pieces implanted in the integrally formed retainer and the shaft are cooled. Bend it in the axial direction, insert the retainer in the axial direction, and assemble it in place.
When heated fluid is passed through the shaft penetration part, the labyrinth seal pieces return to their original memorized shape and protrude in the radial direction, allowing them to seal the gap. Therefore, the cage does not need to be divided into two parts, and can be assembled as a single piece, which simplifies the structure and facilitates the assembly work.
第１図はこの発明の実施例によるラビリンスシール片を
保持器及び軸に取付けた状態を示す要部断面図、第２図
は第１図のラビリンスシール片によりラビリンスシール
装置を組立てた状態を示す要部断面図である。
１：固定部側ラビリンスシール片、２：回転部側ラビリ
ンスシール片、３：保持器、４：軸。FIG. 1 is a sectional view of a main part showing a state in which a labyrinth seal piece according to an embodiment of the present invention is attached to a cage and a shaft, and FIG. 2 shows a state in which a labyrinth seal device is assembled with the labyrinth seal piece of FIG. 1. It is a sectional view of the main part. 1: Fixed part side labyrinth seal piece, 2: Rotating part side labyrinth seal piece, 3: Cage, 4: Shaft.
Claims (1)
取付けられ一体に形成された保持器にそれぞれ複数のラ
ビリンスシール片を備え、このラビリンスシール片によ
り軸貫通部をシールするラビリンスシール装置において
、前記ラビリンスシール片を形状記憶合金により構成す
ることを特徴とするラビリンスシール装置。1) A labyrinth seal device in which a shaft of a rotating machine and a cage integrally formed and attached to a casing surrounding this shaft are each provided with a plurality of labyrinth seal pieces, and the labyrinth seal pieces seal the shaft penetration part. A labyrinth seal device characterized in that a labyrinth seal piece is made of a shape memory alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14222490A JPH0438140A (en) | 1990-05-31 | 1990-05-31 | Labyrinth seal unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14222490A JPH0438140A (en) | 1990-05-31 | 1990-05-31 | Labyrinth seal unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0438140A true JPH0438140A (en) | 1992-02-07 |
Family
ID=15310305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14222490A Pending JPH0438140A (en) | 1990-05-31 | 1990-05-31 | Labyrinth seal unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0438140A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220018444A1 (en) * | 2020-07-15 | 2022-01-20 | The Boeing Company | Labyrinth barrier with members constructed of a shape memory material |
| US11598419B2 (en) | 2020-07-15 | 2023-03-07 | The Boeing Company | Seal assembly with actuation members constructed of shape memory material |
| US11674599B2 (en) | 2020-07-15 | 2023-06-13 | The Boeing Company | Seal assembly including shape memory stiffening members |
-
1990
- 1990-05-31 JP JP14222490A patent/JPH0438140A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220018444A1 (en) * | 2020-07-15 | 2022-01-20 | The Boeing Company | Labyrinth barrier with members constructed of a shape memory material |
| US11592112B2 (en) * | 2020-07-15 | 2023-02-28 | The Boeing Company | Labyrinth barrier with members constructed of a shape memory material |
| US11598419B2 (en) | 2020-07-15 | 2023-03-07 | The Boeing Company | Seal assembly with actuation members constructed of shape memory material |
| US11674599B2 (en) | 2020-07-15 | 2023-06-13 | The Boeing Company | Seal assembly including shape memory stiffening members |
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