JPH0131811Y2 - - Google Patents
Info
- Publication number
- JPH0131811Y2 JPH0131811Y2 JP19960285U JP19960285U JPH0131811Y2 JP H0131811 Y2 JPH0131811 Y2 JP H0131811Y2 JP 19960285 U JP19960285 U JP 19960285U JP 19960285 U JP19960285 U JP 19960285U JP H0131811 Y2 JPH0131811 Y2 JP H0131811Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- cylindrical body
- housing
- seal
- speed
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、機器の回転部分を密封する軸封装置
の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a shaft sealing device for sealing a rotating part of a device.
従来、第２図に概略して示すように、ハウジン
グａ側に気密的に担持された静止側密封要素ｂ
と、シヤフトｃ側に気密的に担持された回転側密
封要素ｄがばね手段（図示せず）によりその対向
端面b′，d′において互いに密接摺動する基本構造
を備え、該摺動によつて流体の密封を行なう軸封
装置（メカニカルシール）が各種機器に広汎に使
用されている。
Conventionally, as schematically shown in FIG.
The rotating sealing element d, which is airtightly supported on the shaft c side, has a basic structure in which the opposing end faces b' and d' closely slide against each other by spring means (not shown). Shaft seal devices (mechanical seals) that seal fluids are widely used in various types of equipment.
しかし、このシール構造では両密封要素ｂ，ｄ
の密接摺動がシヤフトｃの回転をダイレクトに受
けて行なわれるため、摺動部（対向端面b′，d′）
等に対する負荷が大きく、該部において摺動発熱
量の増大や潤滑不足による焼付き、異常摩耗等の
不具合が生じ易いといつた問題がある。 However, in this seal structure, both sealing elements b and d
Since the close sliding of the shaft c is performed directly by the rotation of the shaft c,
There is a problem that the load on these parts is large, and problems such as increased sliding heat generation, seizure due to insufficient lubrication, and abnormal wear are likely to occur in these parts.
本考案は、メカニカルシールがシヤフトの回転
によつて受ける負荷を分割することにより上記問
題点を解決せんとするもので、外径の内歯歯車、
内径の太陽歯車および該両歯車間に配設された少
なくとも１対の遊星歯車が互いに噛合してなる減
速機構を介して、円筒体をハウジングとシヤフト
との間に回転自在に内挿し、該円筒体とハウジン
グとの間および該円筒体とシヤフトとの間のそれ
ぞれにメカニカルシールを装着してシールを行な
うように構成した軸封装置を提供するものであ
る。
The present invention attempts to solve the above problems by dividing the load that the mechanical seal receives due to the rotation of the shaft.
A cylindrical body is rotatably inserted between the housing and the shaft through a reduction mechanism formed by an internal sun gear and at least one pair of planetary gears disposed between the two gears, and the cylindrical body is rotatably inserted between the housing and the shaft. The present invention provides a shaft sealing device configured to perform sealing by installing mechanical seals between a body and a housing and between the cylindrical body and a shaft.
上記円筒体は、ハウジングとシヤフトとの間に
あつて、減速機構によつてシヤフトと同方向にか
つ該シヤフトよりも低速で回転するもので、上記
両メカニカルシールはそれぞれ円筒体とハウジン
グの相対回転および該円筒体とシヤフトの相対回
転によつて密接摺動を行なうため、その摺動速度
は低速となる。
The cylindrical body is located between the housing and the shaft, and rotates in the same direction as the shaft and at a lower speed than the shaft by a reduction mechanism, and the two mechanical seals each control the relative rotation between the cylindrical body and the housing. Since the cylindrical body and the shaft closely rotate through relative rotation, the sliding speed is low.
つぎに、本考案の一実施例を第１図にしたがい
説明する。
Next, one embodiment of the present invention will be explained with reference to FIG.
図中符号１は非回転の機器ハウジング、２は該
ハウジング１の軸孔３内に挿通されて回転するシ
ヤフト、４は該両者１，２間に内挿された円筒体
である。該円筒体４は、その内周面の一部に設け
られた内歯歯車６と、シヤフト２に外挿固定され
た太陽歯車７と、該両歯車６，７間にあつてホル
ダ１０を介してハウジング１側に軸着された遊星
歯車８，９とが互いに噛合してなる減速機構５を
介してハウジング１およびシヤフト２の双方に回
転自在に連結される一方、ベアリング１１を介し
てシヤフト２の外周に回転自在に支持されてい
る。M1はハウジング１と円筒体４との間をシー
ルする外周側の第１のメカニカルシールで、ハウ
ジング１内周段部に気密的に嵌着された非回転の
フローテイングシート１２と、円筒体４外周に気
密的に担持されて該円筒体４とともに回転し、ス
プリングにより弾性付勢されて前記フローテイン
グシート１２と密接摺動するシールリング１３よ
りなり、また、M2は円筒体４とシヤフト２との
間をシールする内周側の第２のメカニカルシール
で、円筒体４内周にリテーナ１４を介して気密的
に担持され、該円筒体４とともに回転するフロー
テイングシート１５と、シヤフト２外周に気密的
に担持されて該シヤフト２とともに回転しスプリ
ングにより弾性付勢されて前記フローテイングシ
ート１５と密接摺動するシールリング１６よりな
る。 In the figure, reference numeral 1 denotes a non-rotating device housing, 2 a rotating shaft inserted into a shaft hole 3 of the housing 1, and 4 a cylindrical body inserted between the two. The cylindrical body 4 has an internal gear 6 provided on a part of its inner peripheral surface, a sun gear 7 externally fixed to the shaft 2, and a holder 10 between the two gears 6 and 7. The planetary gears 8 and 9, which are pivotally attached to the housing 1 side, are rotatably connected to both the housing 1 and the shaft 2 via a reduction mechanism 5, which is formed by meshing with each other. It is rotatably supported on the outer periphery of the M1 is a first mechanical seal on the outer circumferential side that seals between the housing 1 and the cylindrical body 4; A seal ring 13 is airtightly supported on the outer periphery of the cylindrical body 4 and rotates together with the cylindrical body 4, and is elastically biased by a spring and closely slides on the floating seat 12 . A floating seat 15 that is airtightly supported on the inner periphery of the cylindrical body 4 via a retainer 14 and rotates together with the cylindrical body 4, and a second mechanical seal on the inner periphery side that seals between the shaft 2 The seal ring 16 is airtightly supported on the outer periphery, rotates together with the shaft 2, is elastically biased by a spring, and slides closely against the floating seat 15.
上記構成において、シヤフト２の回転駆動が減
速機構５を介して円筒体４に伝達される際、該減
速機構５を構成する太陽歯車７、遊星歯車９，
８、内歯歯車６の噛合によつて強制的に減速され
るため、円筒体４はシヤフト２よりも低速で回転
し、これに伴ない第１のメカニカルシールM1の
シールリング１３および第２のメカニカルシール
M2のフローテイングシート１５も同速度（低速）
で回転する。したがつて第１のメカニカルシール
M1におけるフローテイングシート１２とシール
リング１３の摺回動速度は低速となり、他方、第
２のメカニカルシールM2においても、シールリ
ング１６はシヤフト２とともに高速回転するがフ
ローテイングシート１５は円筒体４とともにシヤ
フト２と同方向へ低速回転するための両者１５，
１６間の相対回転速度（摺回動速度）は円筒体４
（フローテイングシート１５）の回転速度分だけ
低速となる。 In the above configuration, when the rotational drive of the shaft 2 is transmitted to the cylindrical body 4 via the reduction mechanism 5, the sun gear 7, the planetary gear 9,
8. Since the cylindrical body 4 is forcibly decelerated by the meshing of the internal gear 6, the cylindrical body 4 rotates at a lower speed than the shaft 2, and as a result, the seal ring 13 of the first mechanical seal M1 and the second mechanical seal
Floating seat 15 of M2 also has the same speed (low speed)
Rotate with. Therefore, the first mechanical seal
The sliding speed of the floating seat 12 and the seal ring 13 in M1 is low, and on the other hand, in the second mechanical seal M2 , the seal ring 16 rotates at high speed together with the shaft 2, but the floating seat 15 has a cylindrical body. 4 and both 15 for low speed rotation in the same direction as the shaft 2,
The relative rotation speed (sliding rotation speed) between cylindrical body 4
The rotational speed is reduced by the rotational speed of the (floating sheet 15).
以上の説明で明らかなとおり、本考案の軸封装
置は、ハウジングとシヤフトの間に減速機構によ
つてシヤフトよりも低速で回転する円筒体を設
け、ハウジングと円筒体の間および該円筒体とシ
ヤフトの間のそれぞれをシールする構造としたも
ので、シヤフトの回転による負荷が両シールに分
割されるため、各シール摺動部の摺動発熱量は小
さくなり、潤滑不足による摩耗の早期進行等も防
止されてシール性および耐久性を著しく向上させ
ることができるといつた優れた効果を奏する。ま
た、低負荷であるため、特殊な材質のシール部品
を用いる必要はなく、汎用品の使用で十分対処す
ることができる。
As is clear from the above description, the shaft sealing device of the present invention includes a cylindrical body that rotates at a lower speed than the shaft by a deceleration mechanism between the housing and the shaft, and a cylindrical body that rotates at a lower speed than the shaft by a reduction mechanism. It has a structure that seals each part between the shafts, and since the load due to the rotation of the shaft is divided between both seals, the amount of heat generated by sliding of each seal sliding part is reduced, which can lead to premature wear due to lack of lubrication, etc. This has an excellent effect in that the sealing performance and durability can be significantly improved. In addition, since the load is low, there is no need to use seal parts made of special materials, and general-purpose products can be used.
第１図は本考案軸封装置の一実施例を示す半裁
断面図、第２図は従来の軸封装置の概略的構成を
示す説明図である。
１……ハウジング、２……シヤフト、３……軸
孔、４……円筒体、５……減速機構、６……内歯
歯車、７……太陽歯車、８，９……遊星歯車、１
０……ホルダ、１１……ベアリング、１２，１５
……フローテイングシート、１３，１６……シー
ルリング、１４……リテーナ、M1，M2……メカ
ニカルシール。
FIG. 1 is a half-cut sectional view showing an embodiment of the shaft sealing device of the present invention, and FIG. 2 is an explanatory diagram showing the schematic structure of a conventional shaft sealing device. DESCRIPTION OF SYMBOLS 1...Housing, 2...Shaft, 3...Shaft hole, 4...Cylindrical body, 5...Reduction mechanism, 6...Internal gear, 7...Sun gear, 8, 9...Planetary gear, 1
0...Holder, 11...Bearing, 12, 15
... Floating seat, 13, 16 ... Seal ring, 14 ... Retainer, M 1 , M 2 ... Mechanical seal.
Claims (1)
車間に配設された少なくとも１対の遊星歯車が互
いに噛合してなる減速機構を介して、円筒体をハ
ウジングとシヤフトとの間に回転自在に内挿する
一方、該円筒体とハウジングとの間および該円筒
体とシヤフトとの間のそれぞれにメカニカルシー
ルを装着した構造を備えることを特徴とする軸封
装置。 The cylindrical body is rotated between the housing and the shaft through a reduction mechanism in which an external internal gear, an internal sun gear, and at least one pair of planetary gears disposed between the two gears mesh with each other. What is claimed is: 1. A shaft sealing device characterized by having a structure in which the shaft seal can be freely inserted, and a mechanical seal is installed between the cylindrical body and the housing and between the cylindrical body and the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19960285U JPH0131811Y2 (en) | 1985-12-27 | 1985-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19960285U JPH0131811Y2 (en) | 1985-12-27 | 1985-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62108665U JPS62108665U (en) | 1987-07-11 |
| JPH0131811Y2 true JPH0131811Y2 (en) | 1989-09-29 |
Family
ID=31161378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19960285U Expired JPH0131811Y2 (en) | 1985-12-27 | 1985-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0131811Y2 (en) |
-
1985
- 1985-12-27 JP JP19960285U patent/JPH0131811Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62108665U (en) | 1987-07-11 |
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