JPS58196302A - Abnormality sensing method for pressure liquid tank - Google Patents
Abnormality sensing method for pressure liquid tankInfo
- Publication number
- JPS58196302A JPS58196302A JP57079787A JP7978782A JPS58196302A JP S58196302 A JPS58196302 A JP S58196302A JP 57079787 A JP57079787 A JP 57079787A JP 7978782 A JP7978782 A JP 7978782A JP S58196302 A JPS58196302 A JP S58196302A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- oil
- abnormality
- oil pressure
- surface level
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/305—Accumulator separating means without separating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/50—Monitoring, detection and testing means for accumulators
- F15B2201/51—Pressure detection
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Pressure (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、圧液タンクの異常検出方法、特に、水力発電
所等で用いられる圧油タンクの油圧及び油面の異常検出
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting an abnormality in a pressure fluid tank, and particularly to a method for detecting an abnormality in oil pressure and oil level of a pressure oil tank used in a hydroelectric power plant or the like.
圧を検出する油圧センサ２１及び２２、油面を検出する
油面センサ３１及び３２、制御装置４が設けられている
。これらの油圧センサ２１及び２２、油面センサ３１及
び３２には、それぞれ、許容される油圧の上限値及び下
限値、許容される油面の上限値及び下限値が設定されて
おり、これらの検出値がそれぞれの上限値、下限値に達
した場合には、異常状態として検出し、制御装置４によ
って警報を発したり、あるいは、水車、圧油ポンプ等の
運転を停止させて機器の損傷を防止するように゛なって
いる。Oil pressure sensors 21 and 22 that detect pressure, oil level sensors 31 and 32 that detect oil level, and a control device 4 are provided. These oil pressure sensors 21 and 22 and oil level sensors 31 and 32 are set with upper and lower limits of permissible oil pressure and upper and lower limits of permissible oil level, respectively, and these detection When the values reach the respective upper and lower limits, it is detected as an abnormal state and the control device 4 issues an alarm or stops the operation of the water turbine, pressure oil pump, etc. to prevent damage to the equipment. It is meant to be done.
しかし、この異常検出方法は、油圧、油面の検出値が、
上限設定値以上または下限設定値以下となった時、始め
て異常値として検出する方法であり、油圧と油面とをそ
れぞれ独立に検出しているため、必ずしも常時最適な状
態に制御することができず異常の早期発見ができなかっ
た。However, with this abnormality detection method, the detected values of oil pressure and oil level are
This method detects an abnormal value only when it is above the upper limit set value or below the lower limit set value, and because the oil pressure and oil level are detected independently, it is not always possible to control the oil pressure to the optimum state. Therefore, the abnormality could not be detected early.
本発明は、圧液タンクの液圧及び液面の異常状態の早期
発見を可能とすることを目的とし、圧液タンクの液圧及
び液面の異常を検出する方法において、あらかじめポＩ
Ｊ ）ロープ変化特性に従う液圧−液面特性の許容範囲
を定める工程と、液圧センサ及び液面センサにより液圧
及び液面を検出する工程と、この工程により求めた液圧
及び液面の検出値をあらかじめ定められた許容範囲を判
定基準として異常の有無を判定する工程とを有すること
を特徴とするものである。The present invention aims to enable early detection of abnormal conditions in the liquid pressure and liquid level of a pressure liquid tank.
J) The process of determining the permissible range of the hydraulic pressure-liquid level characteristic according to the rope change characteristics, the process of detecting the liquid pressure and liquid level using the liquid pressure sensor and the liquid level sensor, and the process of determining the hydraulic pressure and liquid level determined by this process. The method is characterized by a step of determining the presence or absence of an abnormality using a predetermined tolerance range of the detected value as a determination criterion.
本発明は、圧油タンク等の油圧−油面特性曲線が、第２
図の曲線Ｙで示すように、ポリトロープ変化特性Ｐ・■
ｎ＝一定（Ｐ；圧力、Ｖ；空気の体積、ｎ；ポリトロー
プ指数）に従い変化する点に着目してなされたものであ
る。第２図の横軸、縦軸には、それぞれ、油面Ｈ１油圧
Ｐが示してあり、Ｈ−１，Ｈ−２，Ｐ−１，Ｐ−２は、
それぞれ、従来の異常検出方法における油面Ｈの上限値
、下限値、油圧Ｐの上限値、下限値を示している。In the present invention, the hydraulic pressure-oil level characteristic curve of a pressure oil tank, etc.
As shown by the curve Y in the figure, the polytropic change characteristic P・■
This was done by focusing on the point that changes according to n = constant (P: pressure, V: volume of air, n: polytropic index). The horizontal and vertical axes in FIG. 2 respectively indicate the oil level H1 and the oil pressure P, and H-1, H-2, P-1, and P-2 are
The upper and lower limits of the oil level H and the upper and lower limits of the oil pressure P in the conventional abnormality detection method are shown, respectively.
この図の領域ＡＢＣＤは、従来の異常検出方法において
、油圧上限設定値Ｐ−１、下限設定値Ｐ −２及び油面
上限設定値Ｈ−１、下限設定値Ｈ−２によって区切られ
たもので、この領域ＡＢＣＤの内部を正常値、外部を異
常値としていたので、この領域ＡＢＣＩ）と油圧−油面
特性曲線Ｙとの比較から明らかなように、従来の方法で
は、油圧−油面特性曲線Ｙからのずれが如何に広範囲に
わたって許容されていたかがわかる。例えば、第２図の
油圧−油面特性曲線Ｙ上でＥと表示された油圧、油面は
、圧油タンク１からの漏油、漏気等の何等かの原因で点
Ｆで表示された油圧、油面に変化した場合にも、これら
の値は領域ＡＢＣＤの内部にあるため異常の検出は行わ
れない。これらの油圧油面の値は何れは領域ＡＢＣＤの
外部へ飛び出して異常検出に到るはずであるが、これが
異常検出にいたる迄には時間的遅れがあり、異常状態の
早期発見の見地から問題となっていたわけである。In the conventional abnormality detection method, the area ABCD in this figure is divided by the oil pressure upper limit setting value P-1, the lower limit setting value P-2, the oil level upper limit setting value H-1, and the lower limit setting value H-2. , the inside of this region ABCD was taken as a normal value, and the outside was taken as an abnormal value.As is clear from the comparison between this region ABCI) and the oil pressure-oil level characteristic curve Y, in the conventional method, the oil pressure-oil level characteristic curve It can be seen how wide a range of deviations from Y were allowed. For example, the oil pressure and oil level indicated as E on the oil pressure-oil level characteristic curve Y in Fig. 2 are indicated as point F due to some cause such as oil leakage or air leakage from pressure oil tank 1. Even when the oil pressure and oil level change, no abnormality is detected because these values are within the area ABCD. These hydraulic oil level values should eventually jump out of the area ABCD and lead to the detection of an abnormality, but there is a time delay before the abnormality is detected, and this is a problem from the standpoint of early detection of abnormal conditions. So it was.
以下、実施例について説明する。Examples will be described below.
ｌｓａ図は一実施例の構成を説明するもので、圧油タン
ク１には油圧センサ５．油面センサ６及び演算制御装置
７が設けられており、圧油タンク１の油圧及び油面の状
態が油圧センサ５及び油面セ／す６により連続量として
常時検出され、演算制御装置７に取シ込まれる。演算制
御装置７にはあらかしめ第４図に示すような油圧−油面
特性を判定基準として設定しておき、油圧および油面の
検出値をこの油圧−油面特性と比較し、油圧および油面
の異常の有無の判定を行い、異常が検出された場合は、
即座に適切な処理信号を発信できるように構成されてい
る。The lsa diagram is for explaining the configuration of one embodiment, in which a pressure oil tank 1 is equipped with an oil pressure sensor 5. An oil level sensor 6 and an arithmetic control unit 7 are provided, and the oil pressure and oil level state of the pressure oil tank 1 are constantly detected as continuous quantities by the oil pressure sensor 5 and the oil level unit 6, and are transmitted to the arithmetic and control unit 7. It is taken in. The arithmetic and control unit 7 is preliminarily set to the oil pressure-oil level characteristics as shown in Fig. 4, and the detected values of oil pressure and oil level are compared with this oil pressure-oil level characteristics to determine the oil pressure and oil level. Determine whether there is an abnormality on the surface, and if an abnormality is detected,
It is configured so that it can immediately send out appropriate processing signals.
ここで、油圧−油面特性の判定基準の設定方法について
説明する。Here, a method of setting a criterion for determining oil pressure-oil level characteristics will be explained.
圧油夕／り内の油圧値Ｐと空気量Ｖとは、Ｐ・■０＝一
定
として表わされるポリトロープ変化特性に従って変化す
ることが知られており、それによると、油圧、空気量の
初期値を、それぞれｐ６１ Ｖｎ ＊測定時点における
油圧、・空気量を、それぞれＰ＋、Ｖ＋とすると、
Ｐｏ ’ Ｖｏｆｉ＝Ｐ＋ ’ Ｖ＋１１より
となる。It is known that the oil pressure value P and air amount V in the pressure oil tank change according to polytropic change characteristics expressed as P・■0=constant, and according to this, the initial values of oil pressure and air amount , respectively p61 Vn *If the oil pressure and air volume at the time of measurement are P+ and V+, respectively, then Po'Vofi=P+' V+11.
ここで、ポリトロープ指数ｎは、油面または空気量の単
位時間当りの変化量、および、空気温度の変化によって
変動するものであり、一般的に、ｎ ＝ １．０〜１．
４程度とされている。Here, the polytropic index n varies depending on the amount of change in the oil level or air amount per unit time and the change in air temperature, and generally n = 1.0 to 1.
It is said to be around 4.
このポリトロープ変化特性に基づき、正常な状態にある
圧油タンク内の空気量に対する油圧の変化範囲、すなわ
ち、各機器が動作したことにより変化する各空気量に対
して起り得る油圧の変化範囲を実験により求め、この実
験値に対し、異常判定値として許容できる余裕量を加味
した値に対して、空気量を油面に変換した油面の関数値
とする。Based on this polytropic change characteristic, we conducted an experiment to determine the range of changes in oil pressure for the amount of air in the pressure oil tank under normal conditions, that is, the range of changes in oil pressure that can occur for each amount of air that changes due to the operation of each device. The value obtained by adding the allowable margin as an abnormality determination value to this experimental value is determined as a function value of the oil level, which is obtained by converting the air amount to the oil level.
このようにして求めたのが、第４図で、第４図の横軸、
縦軸には、それぞれ、液面Ｈ１油圧Ｐがとってあり、Ｙ
、およびＹ２はそれぞれ油圧−油面特性の上限値および
下限値の曲線で、ポＩＪ ）ローブ変化特性に従う油圧
−油面特性曲線Ｙを中心とし油圧の上限値曲線Ｙ１
と下限値曲線Ｙ２によって囲まれた範囲を正常値とした
油圧−油面特性が得られる。Figure 4 is the result obtained in this way, and the horizontal axis of Figure 4 is
On the vertical axis, the liquid level H1 and oil pressure P are taken, respectively, and Y
, and Y2 are the curves of the upper and lower limit values of the oil pressure-oil level characteristics, respectively;
Hydraulic pressure-oil level characteristics are obtained with the range surrounded by the lower limit curve Y2 as the normal value.
このようにして油面の関数として方程式化した油圧−油
面特性を演算制御装置７に記憶して置き、油圧センサ５
および油面センサ６によって検出される圧油タンク１の
油圧および油面の状態と比較する。すなわち、検出され
た油面ＨＮに対する油圧−油面特性の上限値Ｙ１と下限
値Ｙ２であるＰゆａｘ ＨＰｍ１ｍの間に検出された油
圧ＰＮが含まれるか否かを判別することによって異常検
出が行われる。The oil pressure-oil level characteristic thus formulated as a function of the oil level is stored in the arithmetic and control unit 7, and the oil pressure sensor 5
and the state of the oil pressure and oil level of the pressure oil tank 1 detected by the oil level sensor 6. That is, abnormality detection is performed by determining whether or not the detected oil pressure PN is included between the upper limit value Y1 and the lower limit value Y2 of the oil pressure-oil level characteristic PyaxHPm1m for the detected oil level HN. It will be done.
この実施例の圧油の異常検出方法は、圧油タンク内の油
圧、油面を常時検出し、ポリトロープ変化特性に従う油
圧−油面特性の許容範囲を判定基準として異常の判定を
行うので、従来よりも早期に異常診断を行うことができ
、その結果、安全で信頼性の高い水力発電所の運用が可
能となる。The pressure oil abnormality detection method of this embodiment constantly detects the oil pressure and oil level in the pressure oil tank, and judges abnormalities based on the permissible range of oil pressure-oil level characteristics that follow polytropic change characteristics. Abnormalities can be diagnosed earlier than before, and as a result, safe and reliable operation of hydropower plants is possible.
なお、実施例は、圧油タンクにおける油圧、油面の異常
検出方法について述べたが、油に限らず、一般の液体を
対象とする圧液タンクに於ても適用することができる。Although the embodiment has described a method for detecting an abnormality in oil pressure and oil level in a pressure oil tank, the present invention is applicable not only to oil but also to pressure liquid tanks for general liquids.
以上の如く、本発明の圧液タンクの異常検出方法は、圧
液タンクの液圧および液面の異常状態の早期発見を可能
とするもので、産業上の効果の犬なるものである。As described above, the method for detecting an abnormality in a pressure liquid tank according to the present invention enables early detection of an abnormal state of the liquid pressure and liquid level in a pressure liquid tank, and is an industrially effective method.
第１図は、従来方法による圧油タンクの異常検出方法を
実施する装置の説明図、第２図は同じく、油圧、油面の
異常検出方法の説明図、第３図は、本発明の方法による
圧油タンクの異常検出方法の一実施例を実施する装置の
説明図、第４図は同じく、油圧、油面の異常検出方法の
説明図である。
１・・・圧油タンク、５・・・油圧センサ、６・・・油
面センサ、７・・・演算制御装置、Ｙ・・・ポＩＪ ト
ロープ変化性θ Ｈ−Ｚ Ｍ
−１漬酌Ｈ茅３ 目
第４ 目FIG. 1 is an explanatory diagram of a device that implements a conventional method for detecting an abnormality in a pressure oil tank, FIG. 2 is an explanatory diagram of a method for detecting an abnormality in oil pressure and oil level, and FIG. 3 is an explanatory diagram of a method for detecting an abnormality in a pressure oil tank. FIG. 4 is an explanatory diagram of an apparatus implementing an embodiment of a method for detecting an abnormality in a pressure oil tank according to the present invention, and FIG. DESCRIPTION OF SYMBOLS 1... Pressure oil tank, 5... Oil pressure sensor, 6... Oil level sensor, 7... Arithmetic control device, Y... PoIJ Trope changeability θ H-Z M
-1 pickled cup H moga 3rd eye 4th eye
Claims (1)
おいて、あらかじめポリトロープ変化特性に従う液圧−
液面特性の許容範囲を定める工程と、液圧センサ及び液
面センサによシ前記液圧及び前記液面を検出する工程と
、該工程により求めた液圧及び液面の検出値を前記許容
範囲を判定基準として異常の有無を判定する工程とを有
することを特徴とする圧液タンクの異常検出方法。 ２、前記液圧及び前記液面が、圧油タンクの油圧及び油
面である圧液タンクの異常検出方法。[Claims] 1. In a method for detecting abnormalities in the hydraulic pressure and liquid level of a hydraulic fluid, the hydraulic pressure according to polytropic change characteristics is determined in advance.
a step of determining the permissible range of liquid level characteristics; a step of detecting the liquid pressure and the liquid level using a liquid pressure sensor and a liquid level sensor; 1. A method for detecting an abnormality in a pressurized liquid tank, comprising the step of determining the presence or absence of an abnormality using a range as a determination criterion. 2. A method for detecting an abnormality in a pressure fluid tank, wherein the fluid pressure and the fluid level are the fluid pressure and fluid level of the pressure fluid tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57079787A JPS58196302A (en) | 1982-05-11 | 1982-05-11 | Abnormality sensing method for pressure liquid tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57079787A JPS58196302A (en) | 1982-05-11 | 1982-05-11 | Abnormality sensing method for pressure liquid tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58196302A true JPS58196302A (en) | 1983-11-15 |
| JPS6324161B2 JPS6324161B2 (en) | 1988-05-19 |
Family
ID=13699918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57079787A Granted JPS58196302A (en) | 1982-05-11 | 1982-05-11 | Abnormality sensing method for pressure liquid tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58196302A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01107123A (en) * | 1987-10-20 | 1989-04-25 | Isuzu Motors Ltd | Gas pressure measuring apparatus of accumulator |
| DE102005023410A1 (en) * | 2005-05-20 | 2006-11-30 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Hydraulic fluid volume value determining method for use in hydraulic braking system, involves measuring accumulator pressures for two points of time, and finding fluid volume from difference between measured pressures based on preset curve |
| JP2008249138A (en) * | 2007-02-20 | 2008-10-16 | Serac Group | Method and device for regulating pressure in container with liquid |
| JP2012509230A (en) * | 2008-11-21 | 2012-04-19 | エクソンモービル アップストリーム リサーチ カンパニー | Liquid impact pressure control method and system |
| JP2013241912A (en) * | 2012-05-22 | 2013-12-05 | Toyota Motor Corp | Liquid submerged portion fuel leakage diagnostic apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328461A (en) * | 1976-08-27 | 1978-03-16 | Eastern Eng Kk | Liquid meter for insulating liquid |
-
1982
- 1982-05-11 JP JP57079787A patent/JPS58196302A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328461A (en) * | 1976-08-27 | 1978-03-16 | Eastern Eng Kk | Liquid meter for insulating liquid |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01107123A (en) * | 1987-10-20 | 1989-04-25 | Isuzu Motors Ltd | Gas pressure measuring apparatus of accumulator |
| DE102005023410A1 (en) * | 2005-05-20 | 2006-11-30 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Hydraulic fluid volume value determining method for use in hydraulic braking system, involves measuring accumulator pressures for two points of time, and finding fluid volume from difference between measured pressures based on preset curve |
| DE102005023410B4 (en) * | 2005-05-20 | 2008-08-28 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Method for detecting gas trapped in the hydraulic fluid of a hydraulic circuit |
| JP2008249138A (en) * | 2007-02-20 | 2008-10-16 | Serac Group | Method and device for regulating pressure in container with liquid |
| JP2012509230A (en) * | 2008-11-21 | 2012-04-19 | エクソンモービル アップストリーム リサーチ カンパニー | Liquid impact pressure control method and system |
| JP2013241912A (en) * | 2012-05-22 | 2013-12-05 | Toyota Motor Corp | Liquid submerged portion fuel leakage diagnostic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6324161B2 (en) | 1988-05-19 |
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