JPS6324161B2 - - Google Patents
Info
- Publication number
- JPS6324161B2 JPS6324161B2 JP57079787A JP7978782A JPS6324161B2 JP S6324161 B2 JPS6324161 B2 JP S6324161B2 JP 57079787 A JP57079787 A JP 57079787A JP 7978782 A JP7978782 A JP 7978782A JP S6324161 B2 JPS6324161 B2 JP S6324161B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- oil
- level
- abnormality
- liquid
- 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
- 230000005856 abnormality Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims 6
- 230000002159 abnormal effect Effects 0.000 description 7
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Control Of Fluid Pressure (AREA)
Description
〔産業上の利用分野〕
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。
〔従来の技術〕
水力発電所等で用いられる圧油タンクには、一
般に、第１図に示すように、圧油タンク１内の油
の油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
よつて警報を発したり、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
ようになつている。
〔発明が解決しようとする問題点〕
しかし、前述の異常検出方法は、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
となつた時、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つた。
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するもの
である。
〔問題点を解決するための手段〕
前述の問題点を解決するためにとられた本発明
の構成は、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、油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。
〔作用〕
ここで、本発明の作用を、本発明の方法と従来
の方法との比較において説明する。
本発明は、圧油タンク等の油圧−油面特性曲線
が、第２図（横軸、縦軸には、それぞれ油面Ｈ、
油圧Ｐが示してある。）の曲線Ｙで示すように、
ポリトロープ変化特性Ｐ・Vn＝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、あらかじめポリトロープ変
化特性に従う、例えば油圧−油面特性の許容範囲
を定める工程において、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と空気量を油面に変
換した値とを用い、後述の第４図に示す如き、ポ
リトロープ変化特性に従う油圧−油面特性曲線を
中心とし油圧の上限値曲線と下限値曲線によつて
囲まれた範囲を正常値として油圧−油面特性が定
められる。そして、この許容範囲を判定基準とし
て、油圧及び油面を検出する工程で求めた油圧及
び油面の検出値の異常の有無を判定するようにな
つている。
一方、従来の異常検出方法を第２図を用いて説
明する。第２図の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。この油圧上限設定値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によつて区切られた領域ABCDが従
来の異常検出方法の許容範囲となり、従来の方法
はこの領域ABCDの内部を正常値、外部を異常
値としている。
この領域ABCDと油圧−油面特性曲線Ｙとの
比較から、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つて許容され
ていたかが明らかである。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
ため従来の方法では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つていた
わけである。
すなわち、従来の方法は油圧、油面それぞれの
上限、下限によつて定める領域ABCDを許容範
囲としていたのに対して、本発明の方法はポリト
ロープ変化特性に基づく油圧−油面特性曲線Ｙを
基準にした許容範囲を用いているので、液圧及び
液面の異常状態の早期発見を可能とすることがで
きる。
〔実施例〕
以下、実施例について説明する。
第３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
ンサ６により連続量として常時検出され、演算制
御装置７に取り込まれる。演算制御装置７にはあ
らかじめ第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。
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。
圧油タンク内の油圧値Ｐと空気量Ｖとは、
Ｐ・Vn＝一定
として表わされるポリトロープ変化特性に従つて
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P0，V0、測定
時点における油圧、空気量を、それぞれP1，V1
とすると、
P0・V0 n＝P1・V1 n
より
P1＝P0・（V0／V1）n
または、
[Industrial Application Field] The present invention relates to a method for detecting an abnormality in a pressure liquid tank, in particular,
This invention relates to a method for detecting abnormalities in oil pressure and oil level in pressure oil tanks used in hydroelectric power plants and the like. [Prior Art] As shown in FIG. 1, a pressure oil tank used in a hydroelectric power plant or the like generally has oil pressure sensors 21 and 22 that detect the oil pressure in the pressure oil tank 1, and sensors 21 and 22 that detect the oil level. oil level sensors 31 and 32, control device 4
is provided. These oil pressure sensors 21 and 22 and oil level sensors 31 and 32 each have
The upper and lower limits of permissible oil pressure and the upper and lower limits of permissible oil level are set, and when these detected values reach the respective upper and lower limits, an abnormal condition is detected. This is detected and the control device 4 issues an alarm or stops the operation of water turbines, pressure oil pumps, etc. to prevent damage to equipment. [Problems to be Solved by the Invention] However, the above-mentioned abnormality detection method is a method in which the detected value of oil pressure and oil level is detected as an abnormal value only when the detected value is equal to or higher than the upper limit set value or lower than the lower limit set value. However, since the oil pressure and oil level are detected independently, it is not always possible to control the oil pressure in an optimal state, making it impossible to detect abnormalities early. An object of the present invention is to enable early detection of abnormal conditions in the liquid pressure and liquid level of a pressure liquid tank. [Means for Solving the Problems] The configuration of the present invention adopted to solve the above-mentioned problems is that, in a method for detecting an abnormality in the liquid pressure and liquid level of a pressure liquid tank, a polytropic change characteristic is determined in advance. A process of determining the permissible range of hydraulic pressure-liquid level characteristics, a process of detecting the hydraulic pressure and liquid level using an oil pressure sensor and a liquid level sensor, and a process of determining the detected values of the hydraulic pressure and liquid level obtained by this process in a predetermined manner. The method is characterized by comprising a step of determining the presence or absence of an abnormality using an allowable range as a determination criterion. [Operation] Here, the operation of the present invention will be explained by comparing the method of the present invention and the conventional method. In the present invention, the hydraulic pressure-oil level characteristic curve of a pressure oil tank, etc. is shown in FIG.
Oil pressure P is shown. ), as shown by the curve Y,
Polytropic change characteristic P・V n = constant (P; pressure,
By focusing on the point that changes according to V: air volume, n: polytropic index), in the process of determining the permissible range of oil pressure-oil level characteristics in advance according to polytropic change characteristics, for example, the air in a pressure oil tank in a normal state The range of change in oil pressure relative to the amount of oil is experimentally determined, and using the experimental value, a value that takes into account an allowable margin as an abnormality judgment value, and a value that converts the amount of air into oil level, as shown in Figure 4 below. The oil pressure-oil level characteristic is determined with the range surrounded by the oil pressure upper limit value curve and the oil pressure lower limit value curve centered on the oil pressure-oil level characteristic curve according to the polytropic change characteristics as a normal value. Then, using this tolerance range as a criterion, it is determined whether or not there is an abnormality in the detected values of the oil pressure and oil level obtained in the step of detecting the oil pressure and oil level. On the other hand, a conventional abnormality detection method will be explained using FIG. H-1, H-2, P-1, P- in Figure 2
2 indicate the upper limit value and lower limit value of the oil level H, and the upper limit value and lower limit value of the oil pressure P, respectively, in the conventional abnormality detection method. The area ABCD separated by the oil pressure upper limit setting value P-1, lower limit setting value P-2, oil level upper limit setting value H-1, and lower limit setting value H-2 is the allowable range of the conventional abnormality detection method. The conventional method treats the inside of this region ABCD as normal values and the outside as abnormal values. From a comparison of this region ABCD and the oil pressure-oil level characteristic curve Y, it is clear how wide a range of deviations from the oil pressure-oil level characteristic curve Y are allowed in the conventional method. 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 if the oil pressure or oil level changes, conventional methods will not detect abnormalities because these values are within the area ABCD. These oil pressure and 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 this is detected.
This has become a problem from the standpoint of early detection of abnormal conditions. In other words, while the conventional method uses the range ABCD defined by the upper and lower limits of oil pressure and oil level as the permissible range, the method of the present invention uses the oil pressure-oil level characteristic curve Y based on polytropic change characteristics as the standard. Since the specified tolerance range is used, abnormal states of hydraulic pressure and liquid level can be detected early. [Example] Examples will be described below. FIG. 3 explains the configuration of one embodiment, in which a pressure oil tank 1 is provided with an oil pressure sensor 5, an oil level sensor 6, and an arithmetic control device 7.
The state of the oil pressure and oil level is constantly detected as continuous quantities by the oil pressure sensor 5 and the oil level sensor 6, and is taken into the arithmetic and control unit 7. The arithmetic and control unit 7 is preset with the oil pressure-oil level characteristics as shown in FIG. The system is configured to determine the presence or absence of an abnormality, and to immediately transmit an appropriate processing signal if an abnormality is detected. Here, a method of setting a criterion for determining oil pressure-oil level characteristics will be explained. 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・V n = constant, and according to this, the initial values of oil pressure and air amount , respectively, P 0 and V 0 , and the oil pressure and air volume at the time of measurement are P 1 and V 1 , respectively.
Then, from P 0 · V 0 n = P 1 · V 1 n , P 1 = P 0 · (V 0 /V 1 ) n or,
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、産業上の効果の大
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 has great industrial effects.
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……ポリト
ロープ変化特性曲線。
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. 1... Pressure oil tank, 5... Oil pressure sensor, 6...
Oil level sensor, 7... Arithmetic control unit, Y... Polytropic change characteristic curve.
Claims (1)
方法において、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り前記液圧及
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. A method for detecting an abnormality in the hydraulic pressure and liquid level of a pressure liquid tank, including a step of determining in advance a permissible range of hydraulic pressure-liquid level characteristics according to polytropic change characteristics, and a liquid pressure sensor and a liquid level sensor. and a step of determining the presence or absence of an abnormality in the detected values of the hydraulic pressure and liquid level obtained in the step using the tolerance range as a criterion. How to detect abnormalities in pressure liquid tanks. 2. An abnormality detection method for a pressure fluid tank, wherein the fluid pressure and the fluid level are the fluid pressure and fluid level of a pressure fluid tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57079787A JPS58196302A (en) | 1982-05-11 | 1982-05-11 | How to detect abnormality in pressure liquid tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57079787A JPS58196302A (en) | 1982-05-11 | 1982-05-11 | How to detect abnormality in pressure liquid tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58196302A JPS58196302A (en) | 1983-11-15 |
| JPS6324161B2 true 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 | How to detect abnormality in pressure liquid tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58196302A (en) |
Families Citing this family (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 |
| 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 |
| FR2912822B1 (en) * | 2007-02-20 | 2009-05-08 | Serac Group Soc Par Actions Si | METHOD AND DEVICE FOR PRESSURE CONTROL IN A TANK |
| WO2010059307A1 (en) * | 2008-11-21 | 2010-05-27 | Exxonmobil Upstream Research Company | Liquid impact pressure control methods and systems |
| JP5556849B2 (en) * | 2012-05-22 | 2014-07-23 | トヨタ自動車株式会社 | Immersion fuel leak diagnostic system |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58196302A (en) | 1983-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1114472A (en) | Pressure monitoring system | |
| JPS6324161B2 (en) | ||
| US3322136A (en) | Fluid transfer control system | |
| CN201097206Y (en) | Automatic control system for high voltage kettle | |
| CN110377063A (en) | Simple liquid-level auto-control device | |
| CN201075040Y (en) | Device for real time on-line detecting and controlling bearing temperature of ultrafine pulverizer | |
| CN112820084A (en) | Safety control method and device for efficient submersible motor | |
| JPS6435053A (en) | Fault diagnosis device for atmospheric pressure sensor | |
| JPS6344740Y2 (en) | ||
| JPS59137609A (en) | Device for detecting abnormality in hydraulic oil volume in hydraulic circuit | |
| JP3000815B2 (en) | Raw water supply control method for deaerator | |
| JPS59116811A (en) | Diagnosing method of input abnormality | |
| JP2891480B2 (en) | Level measuring device | |
| CN110094256A (en) | A kind of temperature control system and its control method | |
| JPS5654519A (en) | Abnormailty detecting method of control system | |
| KR20210011506A (en) | Control of propeller shaft movement | |
| JPS6279816A (en) | Operation control method of filter press with squeezing mechanism | |
| JPS57107958A (en) | Detective method and equipment for displacement from neutral state position of power steering device | |
| JPS56160499A (en) | Method of detecting leak from liquid transportation pipeline | |
| JPS5585239A (en) | Abnormality detector for pressure feed pipe | |
| JPH0960806A (en) | Method of monitoring concentration of boiler tube water | |
| JPS5557633A (en) | Control device for injection pump | |
| JPS5743198A (en) | Abnormal condition supervising device in heat exchanger unit | |
| JPS5779300A (en) | Front pressure control method of ejector nozzle | |
| CN116498672A (en) | Zero drift self-adaption method of pressure sensor, pressure calculation method, system, vehicle and medium |