JP3440418B2 - Shaft sealing device - Google Patents
Shaft sealing deviceInfo
- Publication number
- JP3440418B2 JP3440418B2 JP2000372370A JP2000372370A JP3440418B2 JP 3440418 B2 JP3440418 B2 JP 3440418B2 JP 2000372370 A JP2000372370 A JP 2000372370A JP 2000372370 A JP2000372370 A JP 2000372370A JP 3440418 B2 JP3440418 B2 JP 3440418B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary shaft
- sealing ring
- outer cylinder
- packing
- inner diameter
- 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
Links
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】この発明は、回転軸のシール
装置、特に粉体関係の設備における回転軸の固定壁部材
を貫通する部分において、粉体の外部への漏洩を有効に
防ぐことができるようにしたシール装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can effectively prevent leakage of powder to the outside in a rotary shaft sealing device, particularly in a portion that penetrates a fixed wall member of a rotary shaft in powder-related equipment. And a sealing device.
【０００２】[0002]
【従来の技術】粉体を取り扱う設備、例えば、粉体用ス
クリュウコンベアやロータリーバルブにおいては、粉体
の収納容器や粉体通路を形成する固定壁部材を回転軸が
貫通する部分が構造上発生する。2. Description of the Related Art In equipment for handling powders, such as screw conveyors for powders and rotary valves, a portion where a rotary shaft penetrates a fixed wall member forming a container for powders and a powder passage is structurally generated. To do.
【０００３】このような回転軸が固定壁部材を貫通する
部分は、固定壁部材の内部から外部に粉体が漏洩しない
ようにするシール装置の採用が必要になる。For such a portion where the rotary shaft penetrates the fixed wall member, it is necessary to employ a seal device for preventing the powder from leaking from the inside of the fixed wall member to the outside.
【０００４】従来のシール装置は、回転軸が貫通する固
定壁部材に、回転軸に対して同軸心状に外嵌する外筒を
固定し、この回転軸の外径面と外筒の内径面の環状空間
内に複数のグラントパッキンを挿入し、このグラントパ
ッキンを軸方向に加圧するパッキン押さえを回転軸に外
嵌し、回転軸が固定壁部材を貫通する部分をグラントパ
ッキンで封止することにより、粉体が漏洩しないように
していた。In a conventional sealing device, an outer cylinder fitted coaxially to the rotary shaft is fixed to a fixed wall member through which the rotary shaft penetrates, and the outer diameter surface of the rotation shaft and the inner diameter surface of the outer cylinder are fixed. Insert a plurality of grant packings into the annular space, and fit a packing retainer that pressurizes the grant packings in the axial direction onto the rotating shaft, and seal the part where the rotating shaft penetrates the fixed wall member with the grant packing. Therefore, the powder was prevented from leaking.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記のよう
な従来のシール装置は、グラントパッキンが経時的に硬
化するため、外筒と回転軸の間におけるシール機能が短
期間で低下することになり、このため、回転軸が固定壁
部材を貫通する部分から粉体が漏洩する事態が短期間で
発生するという問題がある。By the way, in the conventional sealing device as described above, since the grant packing is hardened with time, the sealing function between the outer cylinder and the rotary shaft is deteriorated in a short period of time. Therefore, there is a problem that the powder leaks from the portion where the rotary shaft penetrates the fixed wall member in a short period of time.
【０００６】そこで、この発明のに課題は、回転軸が固
定壁部材を貫通する部分に外部からエアを供給すること
により、エア圧力で粉体が漏洩するのを防ぎ、長期にわ
たってシール機能を維持できる軸のシール装置を提供す
ることにある。Therefore, an object of the present invention is to prevent powder from leaking due to air pressure by supplying air from the outside to the portion where the rotary shaft penetrates the fixed wall member, and maintain the sealing function for a long time. An object of the present invention is to provide a shaft seal device.
【０００７】[0007]
【課題を解決するための手段】上記のような課題を解決
するため、この発明は、回転軸が貫通する固定壁部材
に、回転軸に対して同軸心状に外嵌する外筒を固定し、
この回転軸の外径面と外筒の内径面の環状空間内に、シ
ールリングと封止リング及びグラントパッキンを順に挿
入し、回転軸にグラントパッキンを軸方向に加圧するパ
ッキン押さえを外嵌し、上記封止リングは回転軸と一体
に回転し、その外径面に環状の周溝と、端面に周溝から
内径に達する通気溝とが設けられ、上記外筒に周溝と連
通するエア供給孔を設けた構成を採用したものである。In order to solve the above-mentioned problems, the present invention fixes an outer cylinder coaxially fitted to the rotary shaft to a fixed wall member through which the rotary shaft penetrates. ,
A seal ring, a sealing ring, and a grant packing are sequentially inserted into the annular space of the outer diameter surface of the rotating shaft and the inner diameter surface of the outer cylinder, and a packing retainer for axially pressing the grant packing is fitted onto the rotating shaft. The sealing ring rotates integrally with the rotary shaft, and an annular peripheral groove is provided on the outer diameter surface thereof, and a ventilation groove reaching the inner diameter from the peripheral groove is provided on the end surface of the sealing ring. This is a configuration in which a supply hole is provided.
【０００８】上記封止リングは、回転軸と一体に回転す
るようピンにより結合され、この封止リングの内径面
に、回転軸へ圧接するＯリングが組み込まれている構造
とすることができる。The sealing ring may be structured such that it is connected by a pin so as to rotate integrally with the rotating shaft, and an O-ring which is in pressure contact with the rotating shaft is incorporated in the inner diameter surface of the sealing ring.
【０００９】前記外筒のエア供給孔に加圧エアを供給す
ると、回転軸と一体に回転する封止リングの周溝から通
気溝を通り、回転軸とシールリングの嵌合隙間から回転
軸が固定壁部材を貫通する部分にエアが流れ、このエア
圧力で回転軸が固定壁部材を貫通する部分から粉体が漏
洩するのを防ぎ、長期にわたってシール機能を維持でき
ることになる。When pressurized air is supplied to the air supply hole of the outer cylinder, the rotary shaft passes through the ventilation groove from the circumferential groove of the sealing ring that rotates integrally with the rotary shaft, and the rotary shaft moves from the fitting gap between the rotary shaft and the seal ring. Air flows to the portion penetrating the fixed wall member, and this air pressure prevents the powder from leaking from the portion where the rotary shaft penetrates the fixed wall member, so that the sealing function can be maintained for a long period of time.
【００１０】[0010]
【発明の実施の形態】以下、この発明の実施の形態を図
示例と共に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１に示すように、粉体の収納容器や粉体
通路を形成する固定壁部材１の内面にガスケット２が貼
設され、固定壁部材１に回転軸３が内外に貫通する孔４
を設け、孔４を内外に回転軸３が貫通する固定壁部材１
の外面に、内径が回転軸３よりも大径となる円筒状のケ
ーシング５を孔４と同軸心の配置となるよう溶接により
固定し、このケーシング５の外面に、回転軸３に対して
同軸心状に外嵌する外筒６を固定し、回転軸３の外径面
と外筒６の内径面の環状空間内に、シールリング７と封
止リング８及びパッキン９と複数のグラントパッキン１
０を奥から順に挿入し、回転軸３にグラントパッキン１
０を軸方向に加圧するパッキン押さえ１１を外嵌し、こ
のパッキン押さえ１１は外筒６に固定されている。As shown in FIG. 1, a gasket 2 is attached to the inner surface of a fixed wall member 1 forming a powder container and a powder passage, and a hole through which a rotary shaft 3 penetrates in and out of the fixed wall member 1. Four
And a fixed wall member 1 through which the rotary shaft 3 penetrates the hole 4 in and out.
A cylindrical casing 5 having an inner diameter larger than that of the rotating shaft 3 is fixed by welding to the outer surface of the so as to be arranged coaxially with the hole 4, and the outer surface of the casing 5 is coaxial with the rotating shaft 3. The outer cylinder 6 which is fitted in the shape of a core is fixed, and the seal ring 7, the sealing ring 8, the packing 9, and the plurality of grant packings 1 are provided in the annular space of the outer diameter surface of the rotating shaft 3 and the inner diameter surface of the outer cylinder 6.
Insert 0 in order from the back, and attach the rotary seal 3 to the grant packing 1
A packing presser 11 that presses 0 in the axial direction is externally fitted, and the packing presser 11 is fixed to the outer cylinder 6.
【００１２】上記回転軸３は、例えば、粉体用スクリュ
ウコンベアやロータリーバルブ等の回転軸である。The rotating shaft 3 is, for example, a rotating shaft such as a powder screw conveyor or a rotary valve.
【００１３】上記外筒６は、ケーシング５内に嵌合する
外径と、回転軸３の外径面との間に環状空間を形成する
内径を有する円筒部６ａの外径に、ケーシング５の端面
に当接する環状の鍔部６ｂを設けた断面形状を有し、ケ
ーシング５に立設した植え込みボルト１２に鍔部６ｂの
貫通孔６ｃを挿入してナット１３を螺締することによ
り、円筒部６ａの一部がケーシング５内に嵌合し、環状
の鍔部６ｂがケーシング５に、パッキン１４を介して重
なる状態で孔４と同軸心状の配置で固定されている。The outer cylinder 6 has an outer diameter that fits inside the casing 5 and an outer diameter of a cylindrical portion 6a having an inner diameter that forms an annular space between the outer diameter surface of the rotating shaft 3 and the outer diameter of the casing 5. It has a cross-sectional shape with an annular flange 6b that abuts against the end face, and the through hole 6c of the flange 6b is inserted into the stud bolt 12 that is erected on the casing 5, and the nut 13 is screwed into the cylindrical portion. A part of 6a is fitted in the casing 5, and an annular flange 6b is fixed to the casing 5 in a coaxial arrangement with the hole 4 in a state of overlapping with the packing 14 therebetween.
【００１４】上記シールリング７は、回転軸３に嵌合す
る内径と円筒部に嵌合する外径を有し、外周面に設けた
凹溝に円筒部６ａの内径に圧接するＯリング１５が嵌め
込まれ、固定壁部材１の外面に接するように円筒部６ａ
内に組み込まれている。このシールリング７は、Ｏリン
グ１５で円筒部６ａとの嵌合部分をシールすると共に、
回転軸３に僅かな隙間を介して嵌合する内径になってい
る。The seal ring 7 has an inner diameter that fits into the rotating shaft 3 and an outer diameter that fits into the cylindrical portion, and an O-ring 15 that press-contacts the inner diameter of the cylindrical portion 6a in a groove provided on the outer peripheral surface. The cylindrical portion 6a is fitted so as to come into contact with the outer surface of the fixed wall member 1.
Built in. The seal ring 7 seals the fitting portion with the cylindrical portion 6a with the O-ring 15, and
It has an inner diameter that fits into the rotating shaft 3 with a slight gap.
【００１５】上記封止リング８は、回転軸３に嵌合する
内径と円筒部６ａに嵌合する外径を有し、軸方向に幅の
ある環状に形成され、図１（Ｂ）のように、その外径面
に環状の周溝１６と、シールリング７と重なる端面に周
溝１６から内径に達する通気溝１７と、内径で通気溝１
７と反対側の端部側の位置に環状の凹溝１８と、内径で
通気溝１７と軸心を挟んで対向する位置にピン１９の係
合溝２０とがそれぞれ設けられている。The sealing ring 8 has an inner diameter that fits into the rotating shaft 3 and an outer diameter that fits into the cylindrical portion 6a, and is formed in an annular shape having a width in the axial direction, as shown in FIG. 1 (B). Further, an annular peripheral groove 16 is formed on the outer diameter surface thereof, a ventilation groove 17 reaching the inner diameter from the peripheral groove 16 is formed on the end surface overlapping with the seal ring 7, and the ventilation groove 1 having the inner diameter.
An annular recessed groove 18 is provided at a position on the end side opposite to 7, and an engagement groove 20 of a pin 19 is provided at a position opposed to the ventilation groove 17 with an inner diameter on both sides of the axial center.
【００１６】この封止リング８は、テフロン（デュポン
社商品名）のような滑りのよい樹脂やステンレス等を用
いて形成され、回転軸３と円筒部６aの間に組み込ま
れ、回転軸３に植設したピン１９に係合溝２０を係止す
ることにより、回転軸３と一体に回転するように結合さ
れ、凹溝１８内に嵌め込んだOリング２１で、回転軸３
との嵌合部分をシールすると共に、シールリング７に当
接する状態で通気溝１７の内端が、回転軸３とシールリ
ング７の嵌合隙間に連通することになる。The sealing ring 8 is made of Teflon (Dupont).
It is formed by using a slippery resin such as the company's product name) , stainless steel, or the like, is incorporated between the rotary shaft 3 and the cylindrical portion 6a, and engages the engaging groove 20 with the pin 19 planted on the rotary shaft 3. By doing so, the O-ring 21 fitted into the concave groove 18 is coupled so as to rotate integrally with the rotary shaft 3, and
The inner end of the ventilation groove 17 communicates with the fitting gap between the rotary shaft 3 and the seal ring 7 while sealing the fitting portion of the seal ring 7 and the seal ring 7.
【００１７】上記パッキン押さえ１１は、回転軸３に対
して外嵌し、外筒６の鍔部６ｂに立設した植え込みボル
ト２２にナット２３を螺締することにより、回転軸３と
円筒部６ａの間に組み込まれたグラントパッキン１０を
軸方向に押すよう外筒６に固定され、これにより、シー
ルリング７は固定壁部材１の外面に圧接し、かつ、封止
リング８はこのシールリング７に圧接することになり、
グラントパッキン１０は圧縮により、封止リング８より
も外側の部分で回転軸３と円筒部６ａの間を封止してい
る。The packing presser 11 is fitted onto the rotary shaft 3 and a nut 23 is screwed to a stud 22 which is provided upright on the flange 6b of the outer cylinder 6, whereby the rotary shaft 3 and the cylindrical part 6a are secured. The grant packing 10 installed between the two is fixed to the outer cylinder 6 so as to push in the axial direction, whereby the seal ring 7 is in pressure contact with the outer surface of the fixed wall member 1, and the sealing ring 8 is the seal ring 7. Will be pressed into
The grant packing 10 seals between the rotary shaft 3 and the cylindrical portion 6a at a portion outside the sealing ring 8 by compression.
【００１８】上記外筒６の鍔部６ｃには、内端が封止リ
ング８の周溝１６と連通するエア供給孔２４が設けら
れ、このエア供給孔２４を加圧エアの供給源と接続する
ことにより、加圧エアは封止リング８の周溝１６から通
気溝１７を通り、回転軸３とシールリング７の嵌合隙間
から回転軸３が固定壁部材１を貫通する部分に流れ、こ
のエア圧力で回転軸３が固定壁部材１を貫通する部分か
ら粉体が漏洩するのを防ぐことになる。The collar portion 6c of the outer cylinder 6 is provided with an air supply hole 24 whose inner end communicates with the circumferential groove 16 of the sealing ring 8. The air supply hole 24 is connected to a supply source of pressurized air. By doing so, the pressurized air passes from the circumferential groove 16 of the sealing ring 8 through the ventilation groove 17, flows from the fitting gap between the rotary shaft 3 and the seal ring 7 to the portion where the rotary shaft 3 penetrates the fixed wall member 1, This air pressure prevents the powder from leaking from the portion where the rotary shaft 3 penetrates the fixed wall member 1.
【００１９】この発明のシール装置は、上記のような構
成であり、外筒６のエア供給孔２４に加圧エアを供給す
ると、図２に矢印で示すように、加圧エアは封止リング
８の周溝１６から通気溝１７を通り、回転軸３とシール
リング７の嵌合隙間から回転軸３が固定壁部材１を貫通
する孔４部分に、外部から内部に向けて流れることにな
り、この気流によって、固定壁部材１の内部にある粉体
が回転軸３の貫通する孔４の部分から粉体が流出するよ
うなことがなくなる。The sealing device of the present invention has the above-mentioned structure, and when the pressurized air is supplied to the air supply hole 24 of the outer cylinder 6, the pressurized air is supplied to the sealing ring as shown by the arrow in FIG. 8 passes through the ventilation groove 17 from the circumferential groove 16 and the rotating shaft 3 flows from the outside to the inside through the fitting gap between the rotating shaft 3 and the seal ring 7 to the hole 4 portion penetrating the fixed wall member 1. This air flow prevents the powder inside the fixed wall member 1 from flowing out from the portion of the hole 4 through which the rotary shaft 3 penetrates.
【００２０】[0020]
【発明の効果】以上のように、この発明によると、回転
軸が貫通する固定壁部材に、回転軸に対して同軸心状に
外嵌する外筒を固定し、この回転軸の外径面と外筒の内
径面の環状空間内に、シールリングと封止リング及びグ
ラントパッキンを順に挿入し、回転軸にグラントパッキ
ンを軸方向に加圧するパッキン押さえを外嵌し、上記封
止リングの外径面に環状の周溝と、端面に周溝から内径
に達する通気溝とを設け、上記外筒に周溝と連通するエ
ア供給孔を設けたので、エア供給孔に加圧エアを供給す
ることにより、回転軸とシールリングの嵌合隙間から回
転軸が固定壁部材を貫通する部分に、外部から内部に向
けて加圧エアが流れ、この気流により、固定壁部材の内
部にある粉体が回転軸の貫通する部分から外部に漏洩す
るのを有効に防止することができ、粉体の漏洩防止を長
期にわたって維持できる。As described above, according to the present invention, the outer cylinder fitted coaxially to the rotary shaft is fixed to the fixed wall member through which the rotary shaft penetrates, and the outer diameter surface of the rotary shaft is fixed. In the annular space of the inner diameter surface of the outer cylinder, the seal ring, the sealing ring, and the grant packing are inserted in order, and a packing retainer for axially pressing the grant packing on the rotating shaft is externally fitted to the outside of the sealing ring. Since the annular peripheral groove is provided on the radial surface and the ventilation groove reaching the inner diameter from the peripheral groove is provided on the end surface, and the air supply hole communicating with the peripheral groove is provided on the outer cylinder, the pressurized air is supplied to the air supply hole. As a result, pressurized air flows from the outside to the inside of the portion where the rotary shaft penetrates the fixed wall member from the fitting gap between the rotary shaft and the seal ring, and this air flow causes the powder inside the fixed wall member to flow. Effectively prevents leakage from the part that penetrates the rotating shaft to the outside Rukoto can, the leakage prevention of the powder can be maintained for a long time.
【図１】（Ａ）はこの発明に係る軸のシール装置の縦断
面図、（Ｂ）は同上に用いる封止リングの斜視図FIG. 1A is a vertical cross-sectional view of a shaft seal device according to the present invention, and FIG. 1B is a perspective view of a sealing ring used therein.
【図２】この発明に係る軸のシール装置のエアの流れを
示す要部の拡大縦断面図FIG. 2 is an enlarged vertical cross-sectional view of a main part showing an air flow of a shaft seal device according to the present invention.
１ 固定壁部材 ２ ガスケット ３ 回転軸 ４ 孔 ５ ケーシング ６ 外筒 ７ シールリング ８ 封止リング ９ パッキン １０ グラントパッキン １１ パッキン押さえ １２ ボルト １３ ナット １４ パッキン １５ Ｏリング １６ 周溝 １７ 通気溝 １８ 凹溝 １９ ピン ２０ 係合溝 ２１ Ｏリング ２２ 植え込みボルト ２３ ナット ２４ エア供給孔 1 Fixed wall member 2 gasket 3 rotation axes 4 holes 5 casing 6 outer cylinder 7 seal ring 8 Sealing ring 9 packing 10 Grant packing 11 Packing holder 12 volt 13 nuts 14 packing 15 O-ring 16 circumferential groove 17 Ventilation groove 18 groove 19 pin 20 engagement groove 21 O-ring 22 Implant bolt 23 nuts 24 Air supply hole
Claims (2)
に対して同軸心状に外嵌する外筒を固定し、この回転軸
の外径面と外筒の内径面の環状空間内に、シールリング
と封止リング及びグラントパッキンを順に挿入し、回転
軸にグラントパッキンを軸方向に加圧するパッキン押さ
えを外嵌し、上記封止リングは回転軸と一体に回転し、
その外径面に環状の周溝と、端面に周溝から内径に達す
る通気溝とが設けられ、上記外筒に周溝と連通するエア
供給孔を設けた軸のシール装置。1. An outer cylinder fitted coaxially to the rotary shaft is fixed to a fixed wall member through which the rotary shaft penetrates, and in an annular space between the outer diameter surface of the rotary shaft and the inner diameter surface of the outer cylinder. In, the seal ring, the sealing ring and the grant packing are sequentially inserted, and a packing retainer for axially pressing the grant packing in the axial direction is externally fitted to the rotating shaft, and the sealing ring rotates integrally with the rotating shaft,
A shaft seal device, wherein an annular peripheral groove is provided on the outer diameter surface thereof, a ventilation groove reaching the inner diameter from the peripheral groove is provided on the end surface, and an air supply hole communicating with the peripheral groove is provided on the outer cylinder.
するようピンにより結合され、この封止リングの内径面
に、回転軸へ圧接するＯリングが組み込まれている請求
項１に記載の軸のシール装置。2. The sealing ring is coupled by a pin so as to rotate integrally with the rotary shaft, and an O-ring which is in pressure contact with the rotary shaft is incorporated in an inner diameter surface of the sealing ring. Shaft seal device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000372370A JP3440418B2 (en) | 2000-12-07 | 2000-12-07 | Shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000372370A JP3440418B2 (en) | 2000-12-07 | 2000-12-07 | Shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002174347A JP2002174347A (en) | 2002-06-21 |
| JP3440418B2 true JP3440418B2 (en) | 2003-08-25 |
Family
ID=18841926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000372370A Expired - Fee Related JP3440418B2 (en) | 2000-12-07 | 2000-12-07 | Shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3440418B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100699318B1 (en) | 2004-09-14 | 2007-03-23 | 김청균 | Complex sealing unit for a ultra high pressure vessel |
| JP2007239933A (en) * | 2006-03-10 | 2007-09-20 | Agc Seimi Chemical Co Ltd | Shaft seal device for powder processing device |
| CN102588602B (en) * | 2012-02-01 | 2015-08-26 | 海申机电总厂(象山) | centrifuge bearing composite sealing device |
| KR101220655B1 (en) * | 2012-03-29 | 2013-02-07 | 임미경 | Automatic washer of roast meat pan |
| CN105134956A (en) * | 2015-09-21 | 2015-12-09 | 中国船舶重工集团公司第七〇五研究所 | Axial dynamic seal structure |
| CN106286836B (en) * | 2016-09-22 | 2018-03-02 | 大连西力博机电设备科技有限公司 | A kind of bucket elevator aft drive shaft sealing device |
-
2000
- 2000-12-07 JP JP2000372370A patent/JP3440418B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002174347A (en) | 2002-06-21 |
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