JPH051776A - Shaft seal packing sealing device - Google Patents
Shaft seal packing sealing deviceInfo
- Publication number
- JPH051776A JPH051776A JP3209391A JP3209391A JPH051776A JP H051776 A JPH051776 A JP H051776A JP 3209391 A JP3209391 A JP 3209391A JP 3209391 A JP3209391 A JP 3209391A JP H051776 A JPH051776 A JP H051776A
- Authority
- JP
- Japan
- Prior art keywords
- packing
- pressure medium
- pressure
- ring
- shaft seal
- 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
Landscapes
- Sealing Devices (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は軸封パッキン密封装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft seal packing sealing device.
【0002】[0002]
【従来の技術】従来、LNG等の発火性ガス、原子力発
電所における放射性流体、その他有害ガスなどを取り扱
うスタッフイングボックスにおいて「図3」に示すごと
き軸封パッキン密封装置が提案されている。2. Description of the Related Art Conventionally, a shaft sealing packing sealing device as shown in FIG. 3 has been proposed in a staffing box for handling ignitable gases such as LNG, radioactive fluids in nuclear power plants, and other harmful gases.
【0003】この従来装置は、パッキン箱1と該パッキ
ン箱1に遊挿される軸2との間に上部パッキン3aと下
部パッキン3bとを収納し、この両パッキン3a,3b
をパッキン箱1の上部開口よりパッキン押えボルト5で
押し込まれるパッキン押え輪4で締め付けるようになし
てある。In this conventional apparatus, an upper packing 3a and a lower packing 3b are housed between a packing box 1 and a shaft 2 which is loosely inserted in the packing box 1, and both packings 3a and 3b are accommodated.
Is to be tightened with a packing retaining ring 4 which is pushed in from the upper opening of the packing box 1 with a packing retaining bolt 5.
【0004】また、上記上部パッキン3aと下部パッキ
ン3bとの間には、ランタンリング6が介在収納され、
パッキン箱1の周面には該ランタンリング6によって形
成させされる空間部8に連通する排出口7が設けられて
なる。A lantern ring 6 is housed between the upper packing 3a and the lower packing 3b.
A discharge port 7 communicating with a space 8 formed by the lantern ring 6 is provided on the peripheral surface of the packing box 1.
【0005】すなわち、上記従来装置は、パッキンは柔
軟性に富み、与えられた締付面圧が横面圧としてがって
働き軸封を行うが、パッキンはそれ自体の特性として締
付部位より離れるにした締付面圧が低下し本来の機能が
充分に発揮できず、パッキンの応力緩和が相乗して外部
漏洩を起こすことに鑑み、締付面圧が不充分な下部パッ
キン3bからの漏洩を排出口7から安全な部位(通常、
ドレンタンク等)に案内するものである。That is, in the above-mentioned conventional device, the packing has a high flexibility, and the applied tightening surface pressure acts as a lateral surface pressure to perform shaft sealing. However, the packing itself has a characteristic that it is better than the tightening portion. Leakage from the lower packing 3b with insufficient tightening surface pressure in view of the fact that the tightening surface pressure decreases with distance and the original function cannot be fully exerted, and stress relaxation of the packing synergizes to cause external leakage. From the outlet 7 to a safe part (usually
Drain tank etc.).
【0006】[0006]
【発明が解決しようとする課題】しかし、上記従来装置
は、下部パッキン3bの軸封機能の一部を放棄するもの
で、決して効率的とは言えず、また、従来装置のパッキ
ンの締付面圧は「図4」に破線で示される(縦軸にパッ
キン上下方向位置を、横軸にパッキン面圧の大きさを表
す。また、同図中L1,L2はランタンリングの長さを
示すものである。)ごとく上部と下部とでは大きな差を
有し、適正面圧に保たれる範囲は非常に少ないため、密
封性になお信頼性を保つことができない。However, the above-mentioned conventional device abandons a part of the shaft sealing function of the lower packing 3b and is not efficient at all, and the clamping surface of the packing of the conventional device is not effective. The pressure is indicated by a broken line in FIG. 4 (the vertical axis represents the vertical position of the packing, and the horizontal axis represents the magnitude of the packing surface pressure. L1 and L2 in the figure represent the length of the lantern ring. Since there is a large difference between the upper part and the lower part, and the range in which the proper surface pressure is maintained is very small, the reliability of the sealing performance cannot be maintained.
【0007】また、上記従来装置によっても、継続使用
によって生ずるパッキンの応力緩和に対しては、パッキ
ンの増締管理によって対処せざるを得ず、使用現場での
管理が煩雑であると言う欠点は回避できないでいる。Further, even with the above-mentioned conventional apparatus, the stress relaxation of the packing caused by continuous use has to be dealt with by tightening management of the packing, and there is a drawback that the management at the use site is complicated. I can't avoid it.
【0008】すなわち、従来装置の課題は、軸封パッキ
ンの面圧力が上部と下部とで不均一となり、パッキン自
体の機能が充分に発揮できないことであり、さらには、
適正面圧がパッキンの応力緩和等で長期間保持できない
ことである。That is, the problem of the conventional device is that the surface pressure of the shaft-sealing packing becomes uneven between the upper part and the lower part, and the function of the packing itself cannot be sufficiently exerted.
The proper surface pressure cannot be maintained for a long time due to stress relaxation of the packing.
【0009】そこで、本発明は上記欠点に鑑みなされた
もので、軸封パッキンの面圧力の不均一を是正し、パッ
キンの上下広い範囲にわたって適正面圧を与えることで
パッキン本来の機能を高めて密封性を向上し、さらに、
パッキンに応力緩和が生じてもなを適正面圧を自動的に
保ち得る管理の容易な軸封パッキン密封装置を提供する
ことを目的としたものである。Therefore, the present invention has been made in view of the above-mentioned drawbacks. By correcting the non-uniformity of the surface pressure of the shaft-sealing packing, and by giving an appropriate surface pressure over a wide range in the vertical direction of the packing, the original function of the packing is improved. Improves hermeticity, and
An object of the present invention is to provide a shaft seal packing sealing device which can easily maintain a proper surface pressure even if stress relaxation occurs in the packing.
【0010】[0010]
【課題を解決するための手段】上記の目的に沿い、先述
特許請求の範囲を要旨とする本発明の構成は前述課題を
解決するために、パッキン箱1と該パッキン箱1に遊挿
される軸2との間に上部パッキン3aと下部パッキン3
bとを収納し、この両パッキン3a,3bをパッキン箱
1の上部開口よりパッキン押えボルト5で押し込まれる
パッキン押え輪4で締め付けるようになした軸封パッキ
ン密封装置において、上記上部パッキン3aと下部パッ
キン3bとの間に空間部8を設け、該空間部8内には内
外周面を密接またはOリング11等を配して密封した一
対のピストン10a,10bを収納し、上記パッキン箱
1の周面には、空間部8内に連通する圧力媒体注入口1
2を設け、この圧力媒体注入口12に圧力媒体を所定圧
で供送する圧力媒体供送装置30を連結したことを特徴
とする技術的手段を講じたものである。In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned claims, has a packing box 1 and a shaft loosely inserted into the packing box 1 in order to solve the above-mentioned problems. Between the upper packing 3a and the lower packing 3
In the shaft-sealing packing sealing device in which the packings 3b and 3b are housed, and the packings 3a and 3b are tightened by the packing presser ring 4 which is pressed by the packing presser bolt 5 from the upper opening of the packing box 1. A space 8 is provided between the packing 3b and a pair of pistons 10a and 10b whose inner and outer peripheral surfaces are intimately contacted with each other or an O-ring 11 or the like is hermetically housed therein. The pressure medium injection port 1 communicating with the space 8 is provided on the peripheral surface.
2 is provided, and a pressure medium feeding device 30 that feeds the pressure medium at a predetermined pressure is connected to the pressure medium inlet 12, and a technical means is provided.
【0011】[0011]
【作用】それ故、本発明軸封パッキン密封装置は、パッ
キン押えボルト5によって設定荷重を加えることは従来
と同じであるが、同時に、圧力媒体注入口12よりグリ
ース等の圧力媒体を所定圧で圧入する。すると、ピスト
ン10a,10bはこの圧力媒体によって上下方向に離
れる方向の力を受け、上部パッキン3aは上方からはパ
ッキン押え輪4を介するパッキン押えボルト5による荷
重を、下方からは上方側のピストン10aの押上力によ
る荷重を受けることになり、また下部パッキンは下方側
のピストン10bの押下力による荷重を受けることにな
り、その結果、上部パッキン3aと下部パッキン3bと
の締付面圧は「図4」に実線で示されるごとく上下部位
での不均一を是正する作用を呈する。Therefore, in the shaft seal packing sealing device of the present invention, the set load is applied by the packing holding bolt 5 as in the conventional case, but at the same time, the pressure medium such as grease is supplied from the pressure medium inlet 12 at a predetermined pressure. Press in. Then, the pistons 10a and 10b receive a force in a direction to separate in the vertical direction by the pressure medium, and the upper packing 3a receives a load from the packing pressing bolt 5 through the packing pressing ring 4 from above and an upper piston 10a from below. The lower packing receives the load due to the pushing force of the lower piston 10b, and as a result, the tightening surface pressure between the upper packing 3a and the lower packing 3b becomes "Fig. As shown by the solid line in "4", it has the effect of correcting the unevenness in the upper and lower parts.
【0012】そして、長期間の使用によってパッキンの
応力緩和が進行した場合、圧力媒体注入口12より圧入
される圧力媒体の加圧力が所定圧を保っていれば、両ピ
ストン10a,10bが応力緩和に対応して離れる方向
に移動し、締付面圧を自動的に保つ作用を呈するもので
ある。When stress relaxation of the packing progresses due to long-term use, both pistons 10a and 10b undergo stress relaxation if the pressure force of the pressure medium injected from the pressure medium inlet 12 maintains a predetermined pressure. It moves in the direction of separating in response to the above, and exhibits the action of automatically maintaining the tightening surface pressure.
【0013】[0013]
【実施例】次に、本発明の実施例を添付図面にしたがっ
て説明する。Embodiments of the present invention will now be described with reference to the accompanying drawings.
【0014】図中、1がパッキン箱で、このパッキン箱
1と該パッキン箱1に遊挿される軸2との間に上部パッ
キン3aと下部パッキン3bとを収納し、この両パッキ
ン3a,3bをパッキン箱1の上部開口よりパッキン押
えボルト5で押し込まれるパッキン押え輪4で締め付け
るようになしてあるのは従来と同じである。In the figure, 1 is a packing box, and an upper packing 3a and a lower packing 3b are housed between the packing box 1 and a shaft 2 loosely inserted in the packing box 1, and both packings 3a, 3b are housed. As in the conventional case, the packing holding ring 4 is pushed in by the packing holding bolt 5 from the upper opening of the packing box 1 and is tightened.
【0015】上記パッキン押え輪4は、図示例ではフラ
ンジ4aを別体に設けてなるが、このフランジ4aはパ
ッキン押え輪4と一体に構成してもよく、また、パッキ
ン押えボルト5は基端をパッキン箱1に枢支しその上部
をフランジ4aに開穿した通孔13より上方に貫出し、
この貫出部にナット5aを螺合してなり、該ナット5a
を締め付けることで、フランジ4aを介してパッキン押
え輪4をパッキン箱1内に押し込むようになしてある
が、このパッキン押えボルト5は上部に螺頭を有したボ
ルトの螺足を上記フランジ4aの上方から通孔13内を
貫通させ、図示しないパッキン箱1のフランジ部等に螺
合するようになしてもよいのは無論である。In the illustrated example, the packing holding ring 4 is provided with a flange 4a as a separate member, but the flange 4a may be formed integrally with the packing holding ring 4, and the packing holding bolt 5 is a base end. Is rotatably supported on the packing box 1, and the upper part of the packing box 1 protrudes upward from the through hole 13 formed in the flange 4a
A nut 5a is screwed into this protruding portion, and the nut 5a
The packing holding ring 4 is pushed into the packing box 1 through the flange 4a by tightening the. The packing holding bolt 5 has a screw foot of a screw head having a screw head at the upper portion of the flange 4a. It goes without saying that the through hole 13 may be penetrated from above and screwed into a flange portion or the like of the packing box 1 not shown.
【0016】そして、本発明は、上記上部パッキン3a
と下部パッキン3bとの間に空間部を8設け、該空間部
8内には内外周面を密接またはOリング11等を配して
密封した一対のピストン10a,10bを収納してあ
る。The present invention also provides the above-mentioned upper packing 3a.
A space portion 8 is provided between the lower packing 3b and the lower packing 3b, and a pair of pistons 10a and 10b whose inner and outer peripheral surfaces are intimately contacted with each other or an O-ring 11 or the like is sealed are housed therein.
【0017】上記両パッキン10a,10bは両者が近
接した場合でも両者間に空間部8が確保できるようにな
すことが必要で、本実施例では下方側のピストン10b
の上面に外径が該ピストン10bの外径より小さく内径
が該ピストン10bの内径より大きい空間確保用のリン
グ14を突設しこのリング14の周面には圧力媒体が該
リング14の内側にも流入できる通孔15,15,15
・・・を開穿してなる。It is necessary that the packings 10a and 10b have a space 8 between them even when they are close to each other. In this embodiment, the lower piston 10b is provided.
A ring 14 for securing a space, the outer diameter of which is smaller than the outer diameter of the piston 10b and the inner diameter of which is larger than the inner diameter of the piston 10b, is provided so as to project on the upper surface of the ring 14, and a pressure medium is provided inside the ring 14 on the peripheral surface thereof. Through holes 15,15,15
Opened.
【0018】また、図示例において上記両パッキン10
a,10bは共に内外周面に夫々Oリング11,11を
設けて密封性を保っているが、このOリング11は必須
のもではなく、単に、両パッキン10a,10bの内外
周面をパッキン箱1の内周面と軸2の外周面に密接して
もよく、この場合密接面からのわずかな圧力媒体の漏出
が避け得ないが、圧力媒体としてグリース(特に、不活
性グリース)等の潤滑剤としても利用可能なものの使用
が認められる場合は、ピストン10a,10bの摺動面
の潤滑、およびパッキン3a,3b繊維漏れに積極利用
してもよいものである。In the illustrated example, both packings 10 are
Both a and 10b are provided with O-rings 11 and 11 respectively on the inner and outer peripheral surfaces to maintain the hermeticity. However, the O-ring 11 is not essential, and the inner and outer peripheral surfaces of both packings 10a and 10b are simply packed. The inner peripheral surface of the box 1 and the outer peripheral surface of the shaft 2 may be in close contact with each other. In this case, a slight leakage of the pressure medium from the contact surface is unavoidable, but as the pressure medium, grease (particularly inert grease) or the like may be used. When the use of a lubricant that can be used is permitted, the lubricant may be positively used for lubrication of the sliding surfaces of the pistons 10a and 10b and the leakage of fibers of the packings 3a and 3b.
【0019】そして、上記パッキン箱1の周面には、空
間部8内に連通する圧力媒体注入口12を設け、この圧
力媒体注入口12に圧力媒体を所定圧で供送する圧力媒
体供送装置30を連結してある。A pressure medium injection port 12 communicating with the interior of the space 8 is provided on the peripheral surface of the packing box 1, and a pressure medium is supplied to the pressure medium injection port 12 at a predetermined pressure. The device 30 is connected.
【0020】上記圧力媒体としては通常はグリースが使
用されるが、仕様によっては水、ガス等を使用してもよ
い。Grease is usually used as the pressure medium, but water, gas or the like may be used depending on the specifications.
【0021】また、上記圧力媒体供送装置30は、圧力
媒体を所定圧力で圧送できるものであればよく、所定圧
に保たれる圧力媒体容器から複数の圧力媒体注入口12
へ連管で導通するようになしてもよいが、図示例では各
圧力媒体注入口12に簡易な圧力媒体供送装置30を一
個宛連結してなる。The pressure medium feeding device 30 may be any device capable of pressure-feeding the pressure medium at a predetermined pressure, and a plurality of pressure medium inlets 12 are provided from a pressure medium container kept at a predetermined pressure.
Although it may be configured to be electrically connected by a connecting pipe, in the illustrated example, one simple pressure medium feeding device 30 is connected to each pressure medium inlet 12.
【0022】上記、圧力媒体供送装置30は「図2」に
最も明らかに示すごとく、基体31に逆止弁32を有し
た圧力媒体注入口33と圧力媒体吐出口34とを有した
シリンダー状の圧力媒体溜35を凹設し、この圧力媒体
溜35にはその上部開口よりピストン36を出入可能に
挿入し、上記基体31上には、前記ピストン36の昇降
位置を表示する注入量目盛37(図では明示していない
が、窓38の縁部等に上下方向に所定間隔の目盛りを付
す)を設けた窓38を有したバネケース39を連接し、
上記バネケース39内には、ピストン36の上に位置す
るバネ40と、このバネ40の上に位置するバネ押体4
1とを収納し、また、前記バネケース39の蓋45には
バネ押体41を押し込むバネ押えネジ43を設け、さら
に、該蓋45にはバネ押えネジ43のねじ込み量を表示
するバネ撓み表示目盛板44を立設してなる。As shown most clearly in FIG. 2, the pressure medium feeding device 30 is in the form of a cylinder having a pressure medium inlet 33 having a check valve 32 in a base 31 and a pressure medium discharge port 34. Of the pressure medium reservoir 35, and a piston 36 is inserted into the pressure medium reservoir 35 through an upper opening thereof so that the piston 36 can be moved in and out, and an injection amount scale 37 for indicating an ascending / descending position of the piston 36 is provided on the base 31. A spring case 39 having a window 38 provided with (not shown in the figure, graduated at predetermined intervals in the up and down direction on the edge of the window 38, etc.) is connected,
In the spring case 39, the spring 40 located above the piston 36 and the spring pusher 4 located above this spring 40.
1, a spring pressing screw 43 for pressing the spring pressing body 41 is provided on the lid 45 of the spring case 39, and a spring deflection display scale for displaying the screwing amount of the spring pressing screw 43 on the lid 45. A plate 44 is provided upright.
【0023】すなわち、上記圧力媒体供送装置30は、
バネ40の設定荷重によって得られる荷重によって、圧
力媒体溜35内乃至空間部8内の圧力媒体を加圧する。
この圧力媒体の加圧は、バネ40の設定荷重の許容範囲
内において継続されるが、圧力媒体が圧力媒体溜35内
より漏出すると、加圧力が許容範囲以下となる。この際
バネ40の撓み量を表示できれば圧力媒体が許容加圧力
範囲内にあることが確認できることになり、圧力媒体の
圧縮性を無視すれば、ピストン36の昇降量とバネ押体
41の昇降量(バネ押えネジ43の締め込み量に同じ)
との差でこの撓み量を表示でき、注入量目盛37とバネ
撓み表示目盛板44とでこの差が表示できる。具体的に
は、注入量目盛37とバネ撓み表示目盛板44の目盛り
とを同間隔の目盛りに設定し、両目盛りの同位置を指し
た場合にバネ40に最大の撓みが発生し、加圧力が許容
最大値となるように設定しておく。この状態で圧力媒体
が外部に流出すると注入量目盛37を指す値が低下する
のでその許容低下値(許容最小値となる状態)を1〜3
目盛り等と設定しておけば、この範囲で所定の加圧力が
保たれていることが確認できる。That is, the pressure medium feeding device 30 is
The pressure medium in the pressure medium reservoir 35 or the space 8 is pressurized by the load obtained by the set load of the spring 40.
The pressurization of the pressure medium is continued within the permissible range of the set load of the spring 40, but if the pressure medium leaks from the pressure medium reservoir 35, the applied pressure falls below the permissible range. At this time, if the amount of bending of the spring 40 can be displayed, it can be confirmed that the pressure medium is within the allowable pressing force range. If the compressibility of the pressure medium is ignored, the amount of up and down movement of the piston 36 and the amount of up and down movement of the spring pressing body 41 can be confirmed. (Same as the tightening amount of the spring cap screw 43)
The amount of deflection can be displayed by the difference between and, and the difference can be displayed by the injection amount scale 37 and the spring deflection display scale plate 44. Specifically, when the injection amount scale 37 and the scale of the spring flexure display scale plate 44 are set to have the same intervals, the maximum flexure occurs in the spring 40 when the same position on both scales is pointed to, and the pressing force is increased. Is set to the maximum allowable value. When the pressure medium flows out to the outside in this state, the value indicating the injection amount scale 37 decreases, so that the allowable decrease value (a state where the allowable minimum value is obtained) is 1 to 3.
If the scale is set, it can be confirmed that the predetermined pressure is maintained in this range.
【0024】そして、上記注入量目盛37とバネ撓み表
示目盛板44の目盛りとの比較によって所定の目盛り範
囲を超えそうになった場合は、バネ押えネジ43を、そ
の際に注入量目盛37が指す値に対応して締め込むこと
で設定圧力を回復するものである。If the injection amount scale 37 and the scale of the spring flexure display scale plate 44 are compared with each other and the predetermined scale range is about to be exceeded, the spring holding screw 43 is used. The set pressure is restored by tightening according to the indicated value.
【0025】なお、「図1」において、16は空気抜き
プラグを示すものである。In FIG. 1, 16 is an air vent plug.
【0026】[0026]
【発明の効果】本発明軸封パッキン密封装置は上記のご
ときで、上部パッキン3aと下部パッキン3bとの締付
面圧は従来装置に比較し大幅に改善され、上部と下部と
での差が低減され、圧力媒体供送装置30が作用してい
る間は適正な締付面圧が広い範囲にわたって確保できる
のでパッキン機能が充分発揮でき密封性に優れた信頼性
の高い軸封パッキン密封装置を提供することができるも
のである。As described above, the shaft seal packing sealing device of the present invention has a greatly improved tightening surface pressure between the upper packing 3a and the lower packing 3b as compared with the conventional device, and the difference between the upper and lower parts. Since a proper tightening surface pressure can be secured over a wide range while the pressure medium feeding device 30 is operating, a highly reliable shaft seal packing seal device having a sufficient packing function can be exhibited. What can be provided.
【0027】また、本発明は例えパッキンの応力緩和が
進行しても、圧力媒体供送装置30が作用している間は
適正な締付面圧が自動的に確保できメンテナンスが容易
な軸封パッキン密封装置を提供することができるもので
ある。Further, according to the present invention, even if the stress relaxation of the packing progresses, an appropriate tightening surface pressure can be automatically secured while the pressure medium feeding device 30 is operating, and the shaft seal is easy to maintain. A packing sealing device can be provided.
【0028】なお、パッキン3a,3bに総黒鉛材料の
ものを使用すれば損傷のない限り寿命は半永久的と言わ
れており、圧力媒体に不活性グリースを用いれば劣化寿
命も長く、Oリング11を使用するとこのOリング11
もグリースで潤滑されている事から圧力媒体の漏出はほ
とんどなく使用現場でのメンテナンスの必要性はは皆無
と言ってよい軸封パッキン密封装置を提供することがで
きるものである。If the packings 3a, 3b are made of all-graphite material, the life is said to be semi-permanent unless they are damaged. If an inert grease is used as the pressure medium, the deterioration life is long and the O-ring 11 Use this O-ring 11
Since it is lubricated with grease, there is almost no leakage of the pressure medium, and there is no need for maintenance at the site of use, so that it is possible to provide a shaft seal packing sealing device.
【0029】なお、前述はしなかったが、この種軸封パ
ッキン密封装置の製造およびパッキン交換に際しての組
み立てには熟練が必要とされるとしている。すなわち、
パッキンの寸法はパッキン箱1内に挿入する都合上、内
外密封部寸法よりは小さく製作されている。従って、単
にパッキンをパッキン箱11内に挿入しても密封部に間
隙を有しているため、パッキンを1〜2枚挿入するたび
に、円筒状の治具を使用してパッキンを突き固めるごと
き作業を行ってパッキンを密着しなくてはならないが、
この作業は特別な治具を必要とし、また、パッキンには
復元力があるため熟練を有さないとパッキンの適正な密
着ができない。上記に対し、本発明の場合は、すべての
パッキンを挿入し圧力媒体注入口12より組み立て用圧
力媒体(空気または窒素ガス等)を圧送すればパッキン
は瞬時に圧縮面圧力を受け気密に充分な締付面圧力が得
られ、圧力を除去した直後にパッキン押えボルト5で必
要荷重を与えれば下部パッキンにも面圧を維持させるこ
とができ、パッキンの密封性が一段と向上するばかりか
同時に、治具、熟練を必要とせず、品質が安定する利点
をも有するものである。Although not mentioned above, it is said that a skill is required for manufacturing this type of shaft seal packing sealing device and for assembling it when replacing the packing. That is,
The size of the packing is smaller than the size of the inner / outer sealed portion in order to insert the packing into the packing box 1. Therefore, even if the packing is simply inserted into the packing box 11, there is a gap in the sealed portion. Therefore, every time one or two packings are inserted, the packing is tamped with a cylindrical jig. You have to do some work to make the packing stick,
This work requires a special jig, and the packing has a restoring force, so proper packing of the packing cannot be done without skill. On the other hand, in the case of the present invention, if all the packings are inserted and the pressure medium for assembling (air or nitrogen gas etc.) is pressure-fed from the pressure medium inlet 12, the packings instantly receive the compression surface pressure and are sufficiently airtight. If the tightening surface pressure is obtained and the necessary pressure is applied by the packing holding bolt 5 immediately after the pressure is removed, the surface pressure can be maintained even in the lower packing, which not only improves the sealing performance of the packing but also improves the healing. It does not require tools or skill and has the advantage of stable quality.
【図1】本発明の一実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図2】本発明に使用される圧力媒体供送装置の拡大断
面図である。FIG. 2 is an enlarged cross-sectional view of a pressure medium feeding device used in the present invention.
【図3】従来例断面図である。FIG. 3 is a sectional view of a conventional example.
【図3】本発明装置と従来装置とのパッキン締付面圧の
分布図である。FIG. 3 is a distribution diagram of packing tightening surface pressure between the device of the present invention and the conventional device.
1 パッキン箱 2 軸 3a 上部パッキン 3b 下部パッキン 4 パッキン押え輪 5 パッキン押えボルト 8 空間部 10a ピストン 10b ピストン 11 Oリング 12 圧力媒体注入口 30 圧力媒体供送装置 1 packing box 2 shaft 3a upper packing 3b lower packing 4 packing retaining ring 5 packing retaining bolt 8 space 10a piston 10b piston 11 O-ring 12 pressure medium inlet 30 pressure medium feeding device
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成4年5月29日[Submission date] May 29, 1992
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の一実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図2】本発明に使用される圧力媒体供送装置の拡大断
面図である。FIG. 2 is an enlarged cross-sectional view of a pressure medium feeding device used in the present invention.
【図3】従来例断面図である。FIG. 3 is a sectional view of a conventional example.
【図4】本発明装置と従来装置とのパッキン締付面圧の
分布図である。FIG. 4 is a distribution diagram of packing tightening surface pressures of the device of the present invention and the conventional device.
Claims (1)
軸との間に上部パッキンと下部パッキンとを収納し、こ
の両パッキンをパッキン箱の上部開口よりパッキン押え
ボルトで押し込まれるパッキン押え輪で締め付けるよう
になした軸封パッキン密封装置において、上記上部パッ
キンと下部パッキンとの間に空間部を設け、該空間部内
には内外周面を密接またはOリング等を配して密封した
一対のピストンを収納し、上記パッキン箱の周面には、
空間部内に連通する圧力媒体注入口を設け、この圧力媒
体注入口に圧力媒体を所定圧で供送する圧力媒体供送装
置を連結したことを特徴とする軸封パッキン密封装置。Claims: 1. An upper packing and a lower packing are housed between a packing box and a shaft loosely inserted in the packing box, and both packings are fitted with packing holding bolts from an upper opening of the packing box. In a shaft-sealing packing sealing device configured to be tightened by a packing retaining ring to be pushed in, a space is provided between the upper packing and the lower packing, and inner and outer peripheral surfaces are closely contacted or an O-ring or the like is arranged in the space. The pair of sealed pistons are stored in the packing box.
A shaft seal packing sealing device, comprising: a pressure medium injection port communicating with the inside of a space; and a pressure medium supply device for supplying a pressure medium at a predetermined pressure to the pressure medium injection port.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3209391A JPH051776A (en) | 1991-01-31 | 1991-01-31 | Shaft seal packing sealing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3209391A JPH051776A (en) | 1991-01-31 | 1991-01-31 | Shaft seal packing sealing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH051776A true JPH051776A (en) | 1993-01-08 |
Family
ID=12349273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3209391A Pending JPH051776A (en) | 1991-01-31 | 1991-01-31 | Shaft seal packing sealing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH051776A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7118114B2 (en) | 2003-05-15 | 2006-10-10 | Woodward Governor Company | Dynamic sealing arrangement for movable shaft |
US7426936B2 (en) | 2005-11-29 | 2008-09-23 | Woodward Governor Company | Fully independent, redundant fluid energized sealing solution with secondary containment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4811252B1 (en) * | 1963-08-26 | 1973-04-12 |
-
1991
- 1991-01-31 JP JP3209391A patent/JPH051776A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4811252B1 (en) * | 1963-08-26 | 1973-04-12 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7118114B2 (en) | 2003-05-15 | 2006-10-10 | Woodward Governor Company | Dynamic sealing arrangement for movable shaft |
US8074999B2 (en) | 2003-05-15 | 2011-12-13 | Woodward, Inc. | Dynamic sealing arrangement for movable shaft |
US7426936B2 (en) | 2005-11-29 | 2008-09-23 | Woodward Governor Company | Fully independent, redundant fluid energized sealing solution with secondary containment |
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