JPS6319663Y2 - - Google Patents
Info
- Publication number
- JPS6319663Y2 JPS6319663Y2 JP1984059366U JP5936684U JPS6319663Y2 JP S6319663 Y2 JPS6319663 Y2 JP S6319663Y2 JP 1984059366 U JP1984059366 U JP 1984059366U JP 5936684 U JP5936684 U JP 5936684U JP S6319663 Y2 JPS6319663 Y2 JP S6319663Y2
- Authority
- JP
- Japan
- Prior art keywords
- mechanical seal
- detection device
- piezoelectric element
- ring
- sliding
- 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
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Mechanical Sealing (AREA)
Description
【考案の詳細な説明】
本考案は、軸封技術に係るメカニカルシールに
関し、さらに詳しくは、メカニカルシールの破損
や摺動面の潤滑不良等のトラブルを外部から検知
できるように構成したトラブル検知装置付メカニ
カルシールを提供することを目的とする。[Detailed description of the invention] The present invention relates to a mechanical seal related to shaft sealing technology, and more specifically, a trouble detection device configured to be able to externally detect troubles such as damage to the mechanical seal and poor lubrication of the sliding surface. The purpose is to provide mechanical seals with
メカニカルシールのシール性能を左右する最も
重要な因子である摺動面の潤滑状態は、従来、摺
動トルクや、該摺動トルクにて算出される摩擦係
数あるいは摺動面性状の観察からこれを判断して
きたが、経験則上、潤滑状態と摺動トルクとは必
ずしも一致せず、また摺動面性状を観る場合に
は、その都度、当該メカニカルシールを組み込ん
だ機器本体の回転駆動を停止して、該メカニカル
シールを取り外し分解しなければならない。 The lubrication state of the sliding surface, which is the most important factor that affects the sealing performance of mechanical seals, has traditionally been determined by observing the sliding torque, the friction coefficient calculated from the sliding torque, or the sliding surface properties. However, as a rule of thumb, the lubrication state and sliding torque do not necessarily match, and when observing the sliding surface properties, it is necessary to stop the rotational drive of the device body in which the mechanical seal is installed each time. Then, the mechanical seal must be removed and disassembled.
本考案は以上の点に鑑みてなされたもので、当
該メカニカルシールに高感度圧電素子を内蔵し、
該高感度圧電素子により受信するアコーステイツ
クエミツシヨン信号（以下、「AE信号」と略称す
る）を得て摺動面の潤滑状態をチエツクするトラ
ブル検知装置を設けてなるメカニカルシールを提
供せんとすものであつて、あわせて、当該メカニ
カルシール自体のクラツク、割れ等の破損をも検
知（予知）できるように構成したものである。本
考案のメカニカルシールは、上記構成により、当
該メカニカルシールを機器本体に組み込み、かつ
該機器本体を駆動させたままの状態で当該メカニ
カルシールのトラブルの有無を外部から検知する
ことができる。なお、本考案の具体的な検知方法
は以下のとうりである。 The present invention was developed in view of the above points, and includes a highly sensitive piezoelectric element built into the mechanical seal.
We would like to provide a mechanical seal that is equipped with a trouble detection device that checks the lubrication state of the sliding surface by receiving an acoustic emission signal (hereinafter abbreviated as "AE signal") received by the high-sensitivity piezoelectric element. It is also configured to be able to detect (predict) damage such as cracks and breaks in the mechanical seal itself. The mechanical seal of the present invention has the above-described configuration, so that it is possible to incorporate the mechanical seal into the main body of the device and to detect from the outside whether there is a problem with the mechanical seal while the main body of the device is being driven. The specific detection method of the present invention is as follows.
(1) AE信号強度を利用してトラブルを検知する。
すなわち、定常運転時のAE信号強度E0と、実
運転時のAE信号強度Ｅとの比率Ｅ／E0から、
トラブルを検知する。(1) Detect trouble using AE signal strength.
That is, from the ratio E/E 0 of the AE signal strength E 0 during steady operation and the AE signal strength E during actual operation,
Detect trouble.
(2) AE信号の周波数を分析し、各トラブル発生
時の特有の周波数をあらかじめ把握しておき、
これと実運転時の周波数とを対比させてトラブ
ルを検知する。(2) Analyze the frequency of the AE signal and understand in advance the specific frequency when each trouble occurs.
Trouble is detected by comparing this with the frequency during actual operation.
つぎに、本考案トラブル検知装置付メカニカル
シールの実施例を図面にしたがつて説明すると、
まず第１図と第２図は、各各、高感度圧電素子を
内蔵した異なる実施例に係るメカニカルシールを
示している。 Next, an example of the mechanical seal with a trouble detection device according to the present invention will be explained with reference to the drawings.
First, FIGS. 1 and 2 each show mechanical seals according to different embodiments each incorporating a high-sensitivity piezoelectric element.
第１図において、１は回転軸、２は該回転軸１
を軸挿したケーシングの一部を示し、該両部材
１，２の隙間をシールすべくメカニカルシール３
が配設されている。このメカニカルシール３にお
いて、４は前記ケーシング２の軸孔内周にＯリン
グ５を介して気密的に嵌着された支持環であつ
て、その両端面内周寄りには、環状を呈する凹段
部４ａ，４ｂが形成されている。６は前記支持環
４の一方の凹段部４ａ内にＯリング７を介して気
密的に担持された固定側の摺動環であり、前記回
転軸１に従動回転する回転側の摺動環８と摺接し
て密封摺動面９を形成する。前記支持環４の両凹
段部４ａ，４ｂの径方向面には、各各、凹部４
ｃ，４ｄが形成され、各凹部４ｃ，４ｄ内に、高
感度圧電素子（センサー）１０，１１が内挿され
ている。１２は前記他方の凹段部４ｂに嵌着され
た環状の蓋部材であつて、ボルト１３により、前
記支持環４に対して取り付けられている。前記各
高感度圧電素子１０，１１からはケーブル１４，
１５が延び、後記AE検出装置へ接続される。 In FIG. 1, 1 is a rotating shaft, and 2 is the rotating shaft 1.
A mechanical seal 3 is shown to seal the gap between the two members 1 and 2.
is installed. In this mechanical seal 3, reference numeral 4 denotes a support ring that is airtightly fitted to the inner periphery of the shaft hole of the casing 2 via an O-ring 5. Portions 4a and 4b are formed. Reference numeral 6 denotes a stationary sliding ring that is airtightly supported in one recessed step 4a of the support ring 4 via an O-ring 7, and a rotating sliding ring that rotates as a result of the rotating shaft 1. 8 to form a sealing sliding surface 9. A recess 4 is provided on the radial surface of both recessed step portions 4a and 4b of the support ring 4, respectively.
c, 4d are formed, and highly sensitive piezoelectric elements (sensors) 10, 11 are inserted into each recess 4c, 4d. Reference numeral 12 denotes an annular lid member fitted into the other recessed step portion 4b, and is attached to the support ring 4 with bolts 13. A cable 14,
15 extends and is connected to an AE detection device described later.
第２図において、２１は回転軸、２２は該回転
軸２１を軸挿したケーシングの一部を示し、該両
部材２１，２２の隙間をシールすべくメカニカル
シール２３が配設されている。このメカニカルシ
ール２３において、２４と２５は、その中間にベ
ローズ２６と中間リング２７を挾持した支持環で
あつて、図上右側の支持環２５が、前記ケーシン
グ２２の軸孔内周段部に対し、パツキン２８を介
して気密的に嵌着されており、また図上左側の支
持環２４に形成した凹段部２４ａ内に、固定側の
摺動環２９が担持されている。この摺動環２９
は、前記ベローズ２６に備えられた弾発力によ
り、前記回転軸２１に外挿嵌着した回転側の摺動
環３０に密接摺動し、密封摺動面３１を形成す
る。前記固定側の摺動環２９を担持した左側の支
持環２４の凹段部２４ａ径方向面と、右側の支持
環２５の前記パツキン２８に接する端面には、各
各、凹部２４ｂ，２５ａが形成され、各凹部２４
ｂ，２５ａ内に、高感度圧電素子３２，３３が内
挿されており、該各高感度圧電素子３２，３３か
ら延びるケーブル３４，３５が後記AE検出装置
へ接続される。 In FIG. 2, reference numeral 21 indicates a rotating shaft, 22 indicates a part of a casing into which the rotating shaft 21 is inserted, and a mechanical seal 23 is provided to seal the gap between the two members 21 and 22. In this mechanical seal 23, 24 and 25 are support rings in which a bellows 26 and an intermediate ring 27 are sandwiched between them, and the support ring 25 on the right side in the figure is connected to the inner circumferential step of the shaft hole of the casing 22. , and a fixed sliding ring 29 is supported in a recessed step 24a formed in the support ring 24 on the left side in the figure. This sliding ring 29
Due to the elastic force provided in the bellows 26, the bellows 26 closely slides on the rotation-side sliding ring 30 externally fitted onto the rotation shaft 21, thereby forming a sealed sliding surface 31. Recesses 24b and 25a are formed on the radial surface of the recessed step 24a of the left support ring 24 supporting the fixed side sliding ring 29, and on the end surface of the right support ring 25 that contacts the packing 28, respectively. and each recess 24
High-sensitivity piezoelectric elements 32 and 33 are inserted in b and 25a, and cables 34 and 35 extending from the high-sensitivity piezoelectric elements 32 and 33 are connected to an AE detection device described later.
第３図よび第４図は、それぞれ、上記構成にな
るメカニカルシール３，２３の高感度圧電素子１
０，１１，３２，３３によつて受信されるAE信
号を受けて当該メカニカルシール３，２３のトラ
ブルを検知するAE検出装置を示し、第３図は上
記１項のAE信号強度を利用する検知方法、第４
図は上記２項のAE信号の周波数を利用する検知
方法に係る。すなわち前者方法の場合は、AEア
ンプ４１からAC−DCコンバータ４２へ、さらに
レコーダ４３へと接続され、後者方法の場合は
DCアンプ５１からフイルタ５２へ、さらに周波
数分析装置５３へと接続されて、各各、上記手段
によつてトラブルを検知するようになる。 3 and 4 respectively show the high-sensitivity piezoelectric element 1 of the mechanical seal 3, 23 having the above configuration.
0, 11, 32, and 33 to detect troubles in the mechanical seals 3 and 23, and FIG. Method, 4th
The figure relates to the detection method using the frequency of the AE signal in item 2 above. That is, in the case of the former method, the AE amplifier 41 is connected to the AC-DC converter 42 and further to the recorder 43, and in the case of the latter method,
The DC amplifier 51 is connected to the filter 52 and further to the frequency analyzer 53, and troubles are detected by each of the above means.
上記構成になるメカニカルシールは、その内部
に設けた高感度圧電素子１０，１１，３２，３３
と、第３図または第４図に示したAE検出装置と
よりなるトラブル検知装置を有し、当該メカニカ
ルシールを機器本体に組み込んだまま、外部か
ら、諸種のトラブルを検知することができる。 The mechanical seal having the above structure has high-sensitivity piezoelectric elements 10, 11, 32, 33 provided inside it.
It has a trouble detection device consisting of the AE detection device shown in FIG. 3 or FIG. 4, and various troubles can be detected from the outside while the mechanical seal is installed in the main body of the device.
本考案のトラブル検知装置付メカニカルシール
は、以上説明したように、外部から、当該メカニ
カルシールの破損や摺動面の潤滑不良等のトラブ
ルを検知するものであつて、プラントにおける設
備の集中管理システム中へ組み入れることによ
り、トラブルを容易に、かつ早期に検知すること
ができる等の特徴を有し、本考案の実用的効果は
きわめて大きい。 As explained above, the mechanical seal with a trouble detection device of the present invention detects troubles such as breakage of the mechanical seal and poor lubrication of sliding surfaces from the outside, and is a system for centrally managing equipment in a plant. By incorporating it into the system, troubles can be detected easily and early, and the practical effects of the present invention are extremely large.
第１図および第２図は、それぞれ、本考案の実
施例に係る高感度圧電素子を内蔵したメカニカル
シール本体の半裁断面図、第３図および第４図
は、それぞれ、AE検出装置を示す説明図である。
１，２１……回転軸、２，２２……ケーシン
グ、３，２３……メカニカルシール、４，２４，
２５……支持環、４ａ，４ｂ，２４ａ……凹段
部、４ｃ，４ｄ，２４ｂ，２５ａ……凹部、６，
２９……固定側摺動環、８，３０……回転側摺動
環、９，３１……密封摺動面、１０，１１，３
２，３３……高感度圧電素子、４１……AEアン
プ、４２……AC−DCコンバータ、４３……レコ
ーダ、５１……DCアンプ、５２……フイルタ、
５３……周波数分析装置。
1 and 2 are half-cut cross-sectional views of a mechanical seal body incorporating a high-sensitivity piezoelectric element according to an embodiment of the present invention, and FIGS. 3 and 4 are illustrations showing an AE detection device, respectively. It is a diagram. 1, 21... Rotating shaft, 2, 22... Casing, 3, 23... Mechanical seal, 4, 24,
25...Support ring, 4a, 4b, 24a...Concave stepped portion, 4c, 4d, 24b, 25a...Concave portion, 6,
29... Fixed side sliding ring, 8, 30... Rotating side sliding ring, 9, 31... Sealing sliding surface, 10, 11, 3
2, 33... High sensitivity piezoelectric element, 41... AE amplifier, 42... AC-DC converter, 43... Recorder, 51... DC amplifier, 52... Filter,
53...Frequency analyzer.
Claims (1)
該メカニカルシールに高感度圧電素子を内蔵し、
該高感度圧電素子により受信するアコーステイツ
クエミツシヨン信号を得て当該メカニカルシール
の破損や摺動面の潤滑不良等のトラブルを検知す
るトラブル検知装置を設けてなることを特徴とす
るトラブル検知装置付メカニカルシール。 In mechanical seals related to shaft sealing technology, a high-sensitivity piezoelectric element is built into the mechanical seal,
A trouble detection device comprising a trouble detection device for detecting troubles such as breakage of the mechanical seal or poor lubrication of the sliding surface by obtaining an acoustic emission signal received by the high-sensitivity piezoelectric element. Mechanical seal included.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5936684U JPS60172056U (en) | 1984-04-24 | 1984-04-24 | Mechanical seal with trouble detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5936684U JPS60172056U (en) | 1984-04-24 | 1984-04-24 | Mechanical seal with trouble detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60172056U JPS60172056U (en) | 1985-11-14 |
| JPS6319663Y2 true JPS6319663Y2 (en) | 1988-06-01 |
Family
ID=30585730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5936684U Granted JPS60172056U (en) | 1984-04-24 | 1984-04-24 | Mechanical seal with trouble detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60172056U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020134365A1 (en) * | 2020-12-21 | 2022-06-23 | Eagleburgmann Germany Gmbh & Co. Kg | Method for monitoring a mechanical seal assembly and mechanical seal assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5598353A (en) * | 1979-01-22 | 1980-07-26 | Hitachi Ltd | Abnormal condition detecting method of sliding member in rotating machine |
-
1984
- 1984-04-24 JP JP5936684U patent/JPS60172056U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60172056U (en) | 1985-11-14 |
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