JPS6110052Y2 - - Google Patents
Info
- Publication number
- JPS6110052Y2 JPS6110052Y2 JP1979160632U JP16063279U JPS6110052Y2 JP S6110052 Y2 JPS6110052 Y2 JP S6110052Y2 JP 1979160632 U JP1979160632 U JP 1979160632U JP 16063279 U JP16063279 U JP 16063279U JP S6110052 Y2 JPS6110052 Y2 JP S6110052Y2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- rotating ring
- sliding surface
- sealing
- gas
- 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 21
- 239000000843 powder Substances 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
【考案の詳細な説明】
この考案はメカニカルシールに関し、粉体を移
送するスクリユーフイーダーや粉体の排出量調節
用ローターバルブ、或は粉体の混合機等の粉体と
ガスの混合雰囲気を取扱う回転機械に適用可能な
メカニカルシールを提供しようとするものであ
る。[Detailed description of the invention] This invention relates to a mechanical seal that is used in a screw feeder for transferring powder, a rotor valve for adjusting the amount of powder discharged, or a mixed atmosphere of powder and gas such as a powder mixer. The purpose is to provide a mechanical seal that can be applied to rotating machinery that handles rotary machines.
従来上記のような粉体ガス混合雰囲気を取扱う
回転機械の回転軸のシールには、通常グランドパ
ツキンやリツプシール或はオイルシール等を用い
ており、これらのシールと回転軸との間に、清浄
ガスや空気を注入し、パツキン、シール等を保護
する方法が一般に採られてきた。しかしながら、
これらのシールはいずれも回転軸の外周面で漏れ
止めを行うものであるために軸周部の摩耗が多く
短寿命であり、シール性が不十分かつ不安定であ
るという円筒面密封シールの本来的な欠点を避け
得なかつた。またパツキン等の摩耗粉が機内に混
入して製品を汚損したり、シール性が不十分であ
ることから前記した注入ガスの機内側への流入や
大気側への流出が生じるため、ガスのロスが大き
いという欠点があつた。また更に、機械内の粉体
が密封面に噛み込むことから軸周部の摩耗は時間
と共に増大し、このため使用時間の経過にしたが
つて前記のような欠点が増大して行くという問題
があつた。 Conventionally, gland packing, lip seals, oil seals, etc. have been used to seal the rotating shafts of rotating machines that handle mixed powder gas atmospheres such as those mentioned above, and clean gas is injected between these seals and the rotating shafts. Generally, a method has been adopted in which gaskets, seals, etc. are protected by injecting gas or air. however,
All of these seals prevent leakage on the outer circumferential surface of the rotating shaft, so they suffer from a lot of wear around the shaft and have a short lifespan, and the inherent nature of cylindrical surface seals is that the sealing performance is insufficient and unstable. I couldn't avoid certain shortcomings. In addition, abrasion powder from the packing etc. may enter the inside of the machine and contaminate the product, and due to insufficient sealing performance, the above-mentioned injected gas may flow into the inside of the machine or flow out to the atmosphere, resulting in gas loss. The disadvantage was that it was large. Furthermore, wear around the shaft increases over time due to the powder inside the machine getting caught in the sealing surface, which causes the problem that the above-mentioned defects increase as the usage time progresses. It was hot.
一方従来のメカニカルシールをこのような回転
機械に用いた場合、シール面に粉体が噛み込んで
シール面を荒損させたり、シール面の密接を妨げ
隙間を生じせしめたりすることから、寿命が極め
て短くなるため、メカニカルシールを使用するこ
とは実用上不可能であると考えられていた。 On the other hand, when conventional mechanical seals are used in such rotating machines, powder gets caught in the sealing surface, causing damage to the sealing surface, or preventing the sealing surfaces from coming into close contact and creating gaps, which can shorten the lifespan. Because of the extremely short length, it was considered impractical to use a mechanical seal.
この考案は上記のような問題点に鑑みてなさ
れ、従来のメカニカルシールに改良を加えたもの
であつて、回転環の外周部に螺条部を設けると共
に密封摺動面に環状溝を設け、この環状溝に気体
を外部から注入することにより、メカニカルシー
ルによる粉体ガス混合雰囲気の軸封を可能にした
ものである。 This idea was created in view of the above problems, and is an improvement on the conventional mechanical seal, in which a thread is provided on the outer periphery of the rotating ring, and an annular groove is provided on the sealing sliding surface. By injecting gas into this annular groove from the outside, it is possible to seal the shaft in a powder gas mixed atmosphere using a mechanical seal.
図面は、この考案の実施例の一態様を示すもの
であつて、１はグランドカバー、２は回転軸、３
は回転環、４は固定環、５は密封摺動面、１０は
バネ、１１はストツパ、１２，１３，１４及び１
５はＯリングである。回転環３の外周部には螺条
部３０が形成されている。この螺条部３０は、機
内側（図の左側）からみて、回転軸２が右回りの
場合は右ネジ、左回りの場合は左ネジとする。ま
た図に示す例では、回転環３と固定環４とが接触
する部分の夫々の外径は同じで、レベルが合わさ
れ段差がなく均一な平滑面６を形成し、この部分
に粉体が滞留しないように考慮されている。固定
環４の密封摺動面５には、環状の溝４０が形成さ
れている。この溝は通路４１及び注入口４２を介
して気体注入手段（図示せず）に接続され、機内
圧より高い圧力の気体を注入するように構成され
ている。注入される気体としては、N2等の清浄
ガスや空気等が一般的である。従動回転環３は、
後端側（反密封摺動面側）に長く延出させてあ
り、その内周側を中空とし、ここにストツパ１１
の先端側を嵌装させてある。そしてストツパ１１
の外周面と回転環３の内周面間にはＯリング１４
が介装され、回転環３の内周側をシール空間と
し、ここにバネ１０を装着している。 The drawing shows one aspect of the embodiment of this invention, in which 1 is a ground cover, 2 is a rotating shaft, and 3 is a ground cover.
4 is a rotating ring, 4 is a fixed ring, 5 is a sealing sliding surface, 10 is a spring, 11 is a stopper, 12, 13, 14 and 1
5 is an O-ring. A threaded portion 30 is formed on the outer periphery of the rotating ring 3. The threaded portion 30 has a right-handed thread when the rotating shaft 2 rotates clockwise, and a left-handed thread when the rotating shaft 2 rotates counterclockwise, when viewed from the inside of the machine (left side in the figure). In addition, in the example shown in the figure, the outer diameters of the parts where the rotating ring 3 and the fixed ring 4 come into contact are the same, and they are leveled to form a uniform smooth surface 6 with no steps, and the powder stays in this part. It is considered not to. An annular groove 40 is formed in the sealing sliding surface 5 of the fixed ring 4. This groove is connected to a gas injection means (not shown) via a passage 41 and an injection port 42, and is configured to inject gas at a pressure higher than the internal pressure of the machine. The gas to be injected is generally a clean gas such as N 2 or air. The driven rotating ring 3 is
It extends long toward the rear end side (anti-sealing sliding surface side), and its inner circumferential side is hollow, and the stopper 11 is installed here.
The tip side of the is fitted. And Stoppa 11
An O-ring 14 is installed between the outer circumferential surface of the rotating ring 3 and the inner circumferential surface of the rotating ring 3.
is interposed, and the inner peripheral side of the rotating ring 3 is used as a sealing space, into which a spring 10 is attached.
この構成によりバネ１０は混合、雰囲気中に曝
されることなく、粉体等による詰りを排除でき
る。また回転環３の後端側を延出することによ
り、螺条部３０を長く形成でき、螺条部の効果を
促進できる。 With this configuration, the spring 10 is not mixed or exposed to the atmosphere, and clogging due to powder or the like can be eliminated. Further, by extending the rear end side of the rotating ring 3, the threaded portion 30 can be formed long, and the effect of the threaded portion can be promoted.
このメカニカルシールは以上のように構成され
ているため、回転軸２が回転すると、回転環３の
螺条部３０の作用により回転環３自体に矢印Ｆ方
向の力が働き固定環４の方向へ押圧されると共
に、その反作用として、雰囲気内に矢印Ｃ方向の
反流が生ずる。そのため、密封性が良好になると
共に、摺動面５の近傍には粉体が滞留せず、より
機内側へと排出され、粉体の摺動面５への侵入等
を防止する。また、環状溝４０には気体が注入さ
れるため粉体の摺動面５への噛み込み、侵入或は
詰り等が生ずることがなく、そのため粉体による
摺動面の損傷や焼付き等が発生しない。更に回転
数が大きくなれば、溝４０内の気体の動圧が上が
るが、同時に螺条部３０による従動回転環３の密
封摺動面５方向への押圧力も増大するから、この
動圧と押圧力が絶えずバランスし、シール面の良
好な会合性を保つことができる。また該注入され
る気体は、メカニカルシールのシール性が良好で
ある上、上記したように会合性が良好であること
から極めて少なくてすみ、N2ガスを注入流体と
した場合、従来のグランドパツキンを使用したも
のでは５m3／hr必要であつたものが、0.5m3／hr
に削減し得る等、約1/10程度の注入流体量の減少
が可能である。 Since this mechanical seal is constructed as described above, when the rotating shaft 2 rotates, a force in the direction of the arrow F is applied to the rotating ring 3 itself due to the action of the threaded portion 30 of the rotating ring 3, in the direction of the fixed ring 4. While being pressed, a countercurrent in the direction of arrow C is generated in the atmosphere as a reaction. Therefore, the sealing performance is improved, and the powder does not stay in the vicinity of the sliding surface 5, but is discharged further into the machine, thereby preventing powder from entering the sliding surface 5. Furthermore, since gas is injected into the annular groove 40, there is no possibility of powder biting, intrusion, or clogging of the sliding surface 5, which prevents damage or seizure of the sliding surface due to powder. Does not occur. If the rotational speed further increases, the dynamic pressure of the gas in the groove 40 increases, but at the same time, the pressing force of the threaded portion 30 toward the sealing sliding surface 5 of the driven rotating ring 3 also increases. The pressing force is constantly balanced and good associativity of the sealing surfaces can be maintained. In addition, the amount of gas to be injected is extremely small because the mechanical seal has good sealing properties and has good associative properties as described above. The one using 5m 3 /hr required 0.5m 3 /hr.
It is possible to reduce the amount of injected fluid by about 1/10.
以上説明したように、この考案によるメカニカ
ルシールによれば、摺動面への粉体の噛み込みや
侵入が有効に防止し得るため、従来実用的に不可
能とされていた粉体ガス混合雰囲気の軸封へのメ
カニカルシールの適用が可能となる。したがつて
従来グランドパツキン等を使用していたために生
じていた所のシール機能の不完全性及び不安定
性、短寿命、回転軸の減耗、注入ガスのロス、或
は摩耗粉の機内への侵入等の不利欠点を悉く解消
し得るものであつて、その産業上の利用価値には
極めて大きいものがある。 As explained above, the mechanical seal invented by this invention can effectively prevent powder from getting caught or intruding into the sliding surface, so that powder gas mixed atmosphere, which was previously thought to be practically impossible, can be prevented. Mechanical seals can be applied to shaft seals. Therefore, the conventional use of gland packings, etc. has caused imperfections and instability in the sealing function, short lifespan, wear and tear of the rotating shaft, loss of injection gas, or intrusion of abrasion powder into the machine. It is possible to eliminate all the disadvantages such as, and its industrial value is extremely large.
図面はこの考案によるメカニカルシールの一実
施例を示す半側断面図である。
図中、１はグランドカバー、２は回転軸、３は
回転環、４は固定環、５は摺動面、６は平滑面、
３０は螺条部、４０は環状溝、４１は通路、４２
は注入口である。
The drawing is a half sectional view showing an embodiment of the mechanical seal according to this invention. In the figure, 1 is a ground cover, 2 is a rotating shaft, 3 is a rotating ring, 4 is a fixed ring, 5 is a sliding surface, 6 is a smooth surface,
30 is a threaded portion, 40 is an annular groove, 41 is a passage, 42
is the inlet.
Claims (1)
を装置して密封摺動面を構成し、該従動回転環の
後端にストツパの先端を嵌挿し、 該従動回転環とストツパの間にシール手段を介装
し、 該シール手段の大気側空間に従動回転用押圧バネ
を装着し、 前記従動回転環の外周面に密封摺動面方向に従動
回転環を押圧する力と粉体を密封摺動面近傍から
排出する力を生じさせる螺条部を設け、 更に非従動固定環側の密封摺動面に環状溝を設
け、 該環状溝に気体を注入する ことを特徴とする粉体ガス混合雰囲気用メカニカ
ルシール。[Claim for Utility Model Registration] A driven rotating ring is installed on the inside of the machine and a non-driven fixed ring is installed on the atmosphere side to form a sealed sliding surface, and the tip of a stopper is inserted into the rear end of the driven rotating ring, A sealing means is interposed between the driven rotating ring and the stopper, a pressure spring for driven rotation is installed in the atmosphere side space of the sealing means, and the driven rotating ring is attached to the outer peripheral surface of the driven rotating ring in the direction of the sealing sliding surface. A threaded portion is provided to generate a force to press the powder and a force to discharge the powder from near the sealing sliding surface, and an annular groove is provided on the sealing sliding surface on the non-driven fixed ring side, and gas is injected into the annular groove. Mechanical seal for powder gas mixed atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979160632U JPS6110052Y2 (en) | 1979-11-20 | 1979-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979160632U JPS6110052Y2 (en) | 1979-11-20 | 1979-11-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5681262U JPS5681262U (en) | 1981-07-01 |
| JPS6110052Y2 true JPS6110052Y2 (en) | 1986-04-01 |
Family
ID=29671758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979160632U Expired JPS6110052Y2 (en) | 1979-11-20 | 1979-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110052Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0139971Y2 (en) * | 1984-10-25 | 1989-11-30 | ||
| JP5519346B2 (en) * | 2010-03-16 | 2014-06-11 | 日本ピラー工業株式会社 | Dry contact mechanical seal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4937047A (en) * | 1972-08-16 | 1974-04-06 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825169Y2 (en) * | 1978-03-29 | 1983-05-30 | 炭研精工株式会社 | Mechanical seal for slurry liquid |
-
1979
- 1979-11-20 JP JP1979160632U patent/JPS6110052Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4937047A (en) * | 1972-08-16 | 1974-04-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5681262U (en) | 1981-07-01 |
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