JPH0429678A - Abnormality detecting system for noncontact dry gas seal - Google Patents
Abnormality detecting system for noncontact dry gas sealInfo
- Publication number
- JPH0429678A JPH0429678A JP13377990A JP13377990A JPH0429678A JP H0429678 A JPH0429678 A JP H0429678A JP 13377990 A JP13377990 A JP 13377990A JP 13377990 A JP13377990 A JP 13377990A JP H0429678 A JPH0429678 A JP H0429678A
- Authority
- JP
- Japan
- Prior art keywords
- air
- amount
- dry gas
- seal
- abnormality
- 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
- 230000005856 abnormality Effects 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 51
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は送付機に設けられた非接触式ドライガスシール
の異常検出システムに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an abnormality detection system for a non-contact dry gas seal provided in a sending machine.
非接触式ドライガスシールのベントラインにのみガスリ
ーグ量の増加を検知するフローメータ。A flow meter that detects an increase in gas league only in the vent line of a non-contact dry gas seal.
圧力スイッチを設けているのみである。Only a pressure switch is provided.
上記従来技術は、特に、強制給油タイプの軸受をもつ圧
縮機、ブロア、送風機において、軸受用の油が非接触式
ドライガスシールに飛散しな１）ように空気、窒素等の
ガスでエアーシールを施すがこの空気、窒素等のガスが
非接触式ドライガスシールのリークガスと一緒になって
しまう。従って、ベントラインに設けられたフローメー
タや圧力スイッチはこのエアーシール用の空気、窒素等
のガスも同時に検知することになり、非接触式ドライガ
スシールの異常を検出することに関し、この空気、窒素
等のガスを分離するという点について考慮されておらず
、非接触式ドライガスシールに異常がなくてもエアーシ
ール用の空気、窒素等のガス量が増加した場合、これを
非接触式ドライガスシールの異常として扱ってしまう問
題があった。The above-mentioned conventional technology is particularly suitable for compressors, blowers, and blowers that have forced lubrication type bearings, and uses air seals with gas such as air or nitrogen to prevent oil for the bearings from scattering to non-contact dry gas seals. However, this air, nitrogen, and other gases end up together with the leak gas from the non-contact dry gas seal. Therefore, the flow meter and pressure switch installed in the vent line will simultaneously detect air for this air seal, gas such as nitrogen, etc., and in order to detect abnormalities in the non-contact dry gas seal. Separation of gases such as nitrogen has not been considered, and even if there is no abnormality in the non-contact type dry gas seal, if the amount of air for air sealing or gas such as nitrogen increases, it may be necessary to use the non-contact type dry gas seal. There was a problem where it was treated as a gas seal abnormality.
本発明の目的は非接触式ドライガスシールのリーク量増
加とエアーシール用空気、窒素等のガス量や増加を区別
することにあり、さらに、プラントの心臓部である圧縮
機、ブロア、送風機を安易に停止しないように非接触式
ドライガスシールのみの異常を捕えることにある。The purpose of the present invention is to distinguish between an increase in the amount of leakage from non-contact dry gas seals and an increase in the amount of gas such as air for air seals and nitrogen. The purpose is to catch abnormalities only in the non-contact dry gas seal so that it does not stop easily.
上記目的を達成するために、本発明はエアーシール用空
気、窒素等のガス供給ラインに供給ガス量の増加を検知
する装置を設け、非接触式トライガスシールのベントラ
インのリーク量の増加を検知する装置と組合せ、両方の
検知された信号で回路を組みエアーシール用空気、窒素
等ガス量の増加がなく、かつ、非接触式ドライガスシー
ルのベントラインのリーク量が増えた時に、非接触式ド
ライガスシールの異常となみせることができるようにし
たものである。また、両方の検出装置が異常を検知した
場合には、まず、エアーシール供給ガスの異常の有無を
確認し、この異常が無くなっても、まだ、非接触式ドラ
イガスシールのベントの異常が出ていれば非接触式ドラ
イガスシールの異常とみなすことができるようにしたも
のである。In order to achieve the above object, the present invention provides a device for detecting an increase in the amount of gas supplied to the gas supply line for air, nitrogen, etc. for air seals, and detects an increase in the amount of leakage from the vent line of the non-contact type tri-gas seal. In combination with a detection device, a circuit is constructed using both detected signals, and when there is no increase in the amount of air seal gas, nitrogen, etc., and the amount of leakage from the vent line of the non-contact dry gas seal increases, a non-contact signal is detected. This allows the problem to be passed off as an abnormality in the contact type dry gas seal. In addition, if both detection devices detect an abnormality, first check to see if there is an abnormality in the air seal supply gas, and even if this abnormality disappears, there is still an abnormality in the vent of the non-contact dry gas seal. If this occurs, it can be considered as an abnormality in the non-contact dry gas seal.
非接触式ドライガスシールのベントラインに設けられた
フロースイッチ、圧力スイッチ等のり一り量の増加を検
知する装置はこのベントラインを流れるガス量が増加し
た時に働き、一方、エアーシール用供給空気、窒素等の
ガス量の増加を検知する装置はこの供給ガス量が増加し
た時に働く。The flow switch, pressure switch, and other devices installed in the vent line of the non-contact dry gas seal to detect an increase in the amount of gas act when the amount of gas flowing through the vent line increases. , a device that detects an increase in the amount of gas such as nitrogen is activated when the amount of this supplied gas increases.
即ち、両方の異常検出装置が個々に働き各々の異常を区
別することができる。That is, both abnormality detection devices work individually and can distinguish between each abnormality.
以下、本発明の一実施例を第１図により説明する。第１
図は軸受が強制給油タイプであり、かつ、シングルタイ
プの非接触式トライガスシールを圧縮機に適用した時の
系統図を示す。正常時は圧縮機内のガスは非接触式ドラ
イガスシール１でシールされ、わずかにリークするガス
はベント配管２を通って安全なところに排出される。一
方、強制給油される軸受３の油が非接触式ドライガスシ
ール１側に行かないようにするために、非接触式ドライ
ガスシール１と軸受３の間にラビリンス５゜６を設け、
ラビリンス５とラビリンス６の間をエアーシール用の計
装空気を配管４を介して導入する。このエアーシール用
の計装空気は軸受３側と非接触式ドライガスシール１側
に分かれて流れ、非接触式ドライガスシール１側に流れ
た計装空気は非接触式ドライガスシール１を通った圧縮
機内のガスと一緒になってベント配管２を流れ大気に放
出される。このベント配管２を通る量が増加した時、非
接触式ドライガスシール１の異常とみなして警報、圧縮
機停止用の圧力スイッチ７，８が設けられている。しか
し、何らかの原因でエアーシール用計装空気量が増加し
たりラビリンス５の隙間が大きくなり、ベント配管２へ
流れる量が増加すると、ベント配管の警報、圧縮機停止
用の圧力スイッチが働いてしまう。そこで、エアーシー
ル用計装空気ライン４に計装空気量の異常を検出する圧
力スイッチ９を設け、この圧力スイッチが働かないでベ
ントラインの異常が検出された時、及び１両方の配管２
，４の異常が検出されエアーシール用計装空気量を正常
にもどした時にまだベント配管２の警報７が鳴っている
時に初めて非接触式ドライガスシール１の異常と見なす
ように第２図に示すようにシーケンスを組む。ここでは
各々の異常検出に圧力スイッチを使用しているが、これ
らの圧力スイッチの代わりにリミットスイッチ付のフロ
ーメータを使用することもできる。An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows a system diagram when the bearing is a forced lubrication type and a single type non-contact tri-gas seal is applied to the compressor. During normal operation, the gas inside the compressor is sealed by a non-contact type dry gas seal 1, and a small amount of gas that leaks is discharged to a safe place through a vent pipe 2. On the other hand, in order to prevent the oil in the bearing 3 that is forcibly refueled from going to the non-contact dry gas seal 1 side, a labyrinth 5°6 is provided between the non-contact dry gas seal 1 and the bearing 3.
Instrumentation air for air sealing is introduced between the labyrinth 5 and the labyrinth 6 via the piping 4. The instrumentation air for this air seal flows separately into the bearing 3 side and the non-contact dry gas seal 1 side, and the instrumentation air that flows to the non-contact dry gas seal 1 side passes through the non-contact dry gas seal 1. Together with the gas in the compressor, the gas flows through the vent pipe 2 and is released into the atmosphere. When the amount passing through the vent pipe 2 increases, it is assumed that the non-contact type dry gas seal 1 is abnormal, and pressure switches 7 and 8 are provided to issue an alarm and stop the compressor. However, if for some reason the amount of instrumented air for the air seal increases or the gap in the labyrinth 5 increases, and the amount flowing to the vent pipe 2 increases, the vent pipe alarm and pressure switch to stop the compressor will be activated. . Therefore, a pressure switch 9 is installed in the air seal instrument air line 4 to detect an abnormality in the amount of instrument air, and when this pressure switch does not work and an abnormality in the vent line is detected,
, 4 is detected, and when the air seal instrument air amount is restored to normal and the alarm 7 of the vent pipe 2 is still sounding, it is assumed that the non-contact dry gas seal 1 is abnormal. Assemble the sequence as shown. Here, pressure switches are used to detect each abnormality, but a flow meter with a limit switch may be used instead of these pressure switches.
また、本発明のシングルタイプの非接触式ドライガスシ
ール以外にも通常第二シールがバンクアップ用として用
いられるタンデムタイプでも、第二シールが第一シール
がダメージを受けた後も使用する場合には前述のシング
ルタイプと同様のシステムを組むことによって非接触式
ドライガスシールの真の異常を検出することが可能とな
る。In addition to the single type non-contact type dry gas seal of the present invention, even tandem types in which the second seal is normally used for bank-up, can also be used when the second seal is used even after the first seal has been damaged. By assembling a system similar to the single type described above, it is possible to detect true abnormalities in non-contact dry gas seals.
〔発明の効果〕
本発明によれば、非接触式ドライガスシールの異常とエ
アーシール用空気、窒素等のガス量の異常を区別するこ
とができるので、ベントラインの異常で安易に圧縮機、
ブロア、送風機を停止することなく、真に、非接触式ド
ライガスシールの異常のみで圧縮機、ブロア、送風機を
停止することができるでプラントの稼働率を高める効果
がある。[Effects of the Invention] According to the present invention, it is possible to distinguish between an abnormality in the non-contact type dry gas seal and an abnormality in the amount of gas such as air for air sealing and nitrogen.
It is possible to stop the compressor, blower, and blower without stopping the blower and the blower simply by an abnormality in the non-contact dry gas seal, which has the effect of increasing the operating rate of the plant.
第１図は本発明の一実施例の系統図、第２図は本発明の
一実施例のシステムフローダイヤグラムを示す。
１ ・非接触式ドライガスシール、２・・ベント配管、
４・・エアーシール用計装空気用配管、７，８・・・ベ
ント配管の流量増加検出用圧力スイッチ、９・エアーシ
ール用計装空気量の増加検出用圧力スイッチ。FIG. 1 shows a system diagram of an embodiment of the present invention, and FIG. 2 shows a system flow diagram of an embodiment of the invention. 1. Non-contact dry gas seal, 2. Vent piping,
4. Instrument air piping for air seal, 7, 8... Pressure switch for detecting an increase in the flow rate of vent piping, 9. Pressure switch for detecting an increase in the amount of instrument air for air seal.
Claims (1)
風機において、前記エアーシール用空気または代用ガス
供給ラインに当該ガス量の増加を検知する装置と前記非
接触式ドライガスシールのベントラインのガスリーク量
の増加を検知する装置とを組合せたことを特徴とする非
接触式ドライガスシールの異常検出システム。1. In a blower with a non-contact type dry gas seal and an air seal, a device for detecting an increase in the amount of gas in the air seal air or substitute gas supply line and the amount of gas leakage from the vent line of the non-contact type dry gas seal. A non-contact dry gas seal abnormality detection system characterized by combining a device that detects an increase in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13377990A JPH0429678A (en) | 1990-05-25 | 1990-05-25 | Abnormality detecting system for noncontact dry gas seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13377990A JPH0429678A (en) | 1990-05-25 | 1990-05-25 | Abnormality detecting system for noncontact dry gas seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0429678A true JPH0429678A (en) | 1992-01-31 |
Family
ID=15112792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13377990A Pending JPH0429678A (en) | 1990-05-25 | 1990-05-25 | Abnormality detecting system for noncontact dry gas seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0429678A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007791A1 (en) * | 1999-07-23 | 2001-02-01 | Hitachi, Ltd. | Turbo fluid machinery and dry gas seal used for the machinery |
| US6802689B2 (en) | 2000-03-09 | 2004-10-12 | Hitachi, Ltd. | Turbo type fluid machine and dry gas seal for use therefor |
| JP2007177887A (en) * | 2005-12-28 | 2007-07-12 | Hitachi Plant Technologies Ltd | Centrifugal compressor and dry gas sealing system to be used for the same |
| JP2008137084A (en) * | 2006-11-29 | 2008-06-19 | Nicchu Co Ltd | Shot blasting apparatus |
| WO2016080014A1 (en) * | 2014-11-20 | 2016-05-26 | 三菱重工コンプレッサ株式会社 | Seal gas supply control method, seal gas supply control appratus, and rotary machine |
| US9624785B2 (en) | 2014-01-24 | 2017-04-18 | Solar Turbines Incorporated | System for monitoring health of a seal |
| JP2017517703A (en) * | 2014-03-27 | 2017-06-29 | シーリンク コーポレイションＳｅａｌｉｎｋ Ｃｏｒｐ． | Sealed system with leak detection function |
-
1990
- 1990-05-25 JP JP13377990A patent/JPH0429678A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001007791A1 (en) * | 1999-07-23 | 2001-02-01 | Hitachi, Ltd. | Turbo fluid machinery and dry gas seal used for the machinery |
| US6524059B1 (en) | 1999-07-23 | 2003-02-25 | Hitachi, Ltd. | Turbo fluid machinery and dry gas seal used for the machinery |
| US6802689B2 (en) | 2000-03-09 | 2004-10-12 | Hitachi, Ltd. | Turbo type fluid machine and dry gas seal for use therefor |
| JP2007177887A (en) * | 2005-12-28 | 2007-07-12 | Hitachi Plant Technologies Ltd | Centrifugal compressor and dry gas sealing system to be used for the same |
| JP2008137084A (en) * | 2006-11-29 | 2008-06-19 | Nicchu Co Ltd | Shot blasting apparatus |
| US9624785B2 (en) | 2014-01-24 | 2017-04-18 | Solar Turbines Incorporated | System for monitoring health of a seal |
| JP2017517703A (en) * | 2014-03-27 | 2017-06-29 | シーリンク コーポレイションＳｅａｌｉｎｋ Ｃｏｒｐ． | Sealed system with leak detection function |
| WO2016080014A1 (en) * | 2014-11-20 | 2016-05-26 | 三菱重工コンプレッサ株式会社 | Seal gas supply control method, seal gas supply control appratus, and rotary machine |
| JP2016098696A (en) * | 2014-11-20 | 2016-05-30 | 三菱重工コンプレッサ株式会社 | Seal gas supply control method, seal gas supply controller, and rotary machine |
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