EP1477678A2 - Détection anticipée de pannes dans les soupapes de pompes - Google Patents

Détection anticipée de pannes dans les soupapes de pompes Download PDF

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Publication number
EP1477678A2
EP1477678A2 EP04011109A EP04011109A EP1477678A2 EP 1477678 A2 EP1477678 A2 EP 1477678A2 EP 04011109 A EP04011109 A EP 04011109A EP 04011109 A EP04011109 A EP 04011109A EP 1477678 A2 EP1477678 A2 EP 1477678A2
Authority
EP
European Patent Office
Prior art keywords
pump
valve
generated
valves
signal 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
Application number
EP04011109A
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German (de)
English (en)
Other versions
EP1477678A3 (fr
EP1477678B1 (fr
EP1477678B2 (fr
Inventor
Eberhard Prof. Dr. Schlücker
Ralf Benken
Michael Stritzelberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lewa GmbH
Original Assignee
Lewa Herbert Ott GmbH and Co KG
Priority date (The priority date 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 date listed.)
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Publication date
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Application filed by Lewa Herbert Ott GmbH and Co KG filed Critical Lewa Herbert Ott GmbH and Co KG
Publication of EP1477678A2 publication Critical patent/EP1477678A2/fr
Publication of EP1477678A3 publication Critical patent/EP1477678A3/fr
Publication of EP1477678B1 publication Critical patent/EP1477678B1/fr
Application granted granted Critical
Publication of EP1477678B2 publication Critical patent/EP1477678B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations

Definitions

  • the invention relates to a method for monitoring and automatic early fault detection the valves, in particular the suction and / or pressure valves, an oscillating positive displacement pump, in particular a diaphragm metering pump, according to the preamble of claim 1.
  • the invention also relates to a device for carrying out this method Device according to the preamble of claim 14.
  • suction and pressure valves are subject to constant wear and tear has a negative effect on the delivery rate of the pump and on its dosing accuracy.
  • valves fail prematurely. This causes unwanted due to the then necessary immediate business interruption Consequential damages.
  • the invention is therefore based on the object to eliminate the described Disadvantages of providing a method and a device by means of which it is possible to monitor the valves of a pump of the generic type in such a way that results in an automatic fault early detection of the valves, so that valve damage can be detected in time and an interruption of the Pump can be planned.
  • the invention also provides one created for carrying out this method Device before whose features are listed in claim 14.
  • the method according to the invention is based on the essential idea that from a leaking valve due to the backflow of the conveying fluid in the closed Valve condition generated increased operating noise as a measure of the Leakage of the valve to use.
  • the generated effective signal level continuously monitored and with one of the operating noise the reference valve level formed with the valve intact valve, wherein at a predetermined level deviation due to an increase in level Operating noise a fault early detection indicator is triggered.
  • the invention thus makes advantageous advantage of the effect that at intact pump a certain background noise can be seen. Join this at the same time some discrete typical single sounds. These have different Causes, such as the meshing in the reduction gear on the pump engine or the opening and closing noises of the valves.
  • valves have become leaky due to the backflow of the delivery fluid in the closed valve state increased typical operating noise. This increased operating noise depends on the return flow the delivery fluid and are inventively as a measure of the leakage of the Valve used.
  • the in the oscillating displacement pumps, especially in the speech standing diaphragm dosing pumps, used for applying suction and Pressure valves are usually either ball valves or plate valves or Cone valves that can be spring loaded or pressure controlled.
  • These demands placed on these valves in that they are just at the right time open and close and that they are tight in the foreseeable time have to be.
  • the damage that may occur to such valves is expressed either in a notch leakage generated by one or more notches on the valve seat, where a local damage occurs, or from a one-dimensional damage generating surface leakage.
  • the sealing edge of the valve seat is not punctually by one or more notches, but over the entire circumference damaged. In both cases, increased flow noise occurs at the valve seat on what u.a. by the coincidence of the occurring cavitation bubbles explain.
  • the operating noise generated by the pump and thus also that of the valves measured as structure-borne noise may be in the embodiment of Invention by means of a structure-borne sound sensor or a microphone, in particular but by means of a vibration acceleration sensor, preferably works on the piezoelectric compression principle and an integrated May have charge amplifier.
  • the generated structure-borne noise at the pump head in particular at a central location thereof.
  • the generated structure-borne sound at or near the valve in question measure up.
  • This may be the suction and / or pressure valve, but in addition also the provided on the pump body further hydraulic valves, the leak supplement or the removal of excess hydraulic fluid serve.
  • the invention provides various possibilities. So it is in Embodiment of the invention possible with the operating noise of the pump intact valves formed reference signal level over a predetermined period to mediate. Also, the increased operating noise of the pump with leaky valves formed RMS signal level over a predetermined Period to be averaged.
  • a trigger signal for use which leads to a defined Time of the pump stroke cycle is generated. This can e.g. in the suction stroke end position of the piston.
  • the trigger signal must advantageously no meet very high accuracy requirements. For example, an accuracy from +/- 5 ° crank angle. This is for monitoring the suction valve in a defined period of time, the generated structure-borne sound signal during the displacement phase (Pressure stroke) detected and compared. In contrast, for the Monitoring the pressure valve the corresponding period in the intake phase (Suction stroke).
  • the defined period can only be used for monitoring purposes, for example of the pressure valve extend over a range of 90 - 160 ° of the crank angle, while for the monitoring of the suction valve such a defined Period sufficient, extending over a range of 270 - 340 ° of the crank angle extends.
  • the generation of the trigger signal can according to the invention in various ways carried out, for example by means of a contactor mounted on the pump engine, by means of a corresponding scanning of the piston rod, by means of the detection a characteristic signal in the generated structure-borne sound signal, for example due to the game envelope in the engine, and also on the basis of other characteristic signals, e.g. the measured pressure in the airspace of the hydraulic storage room or in the engine.
  • the reference signal level is expediently taken to be the reference value. which is associated with an intact valve.
  • This reference value can be up be detected in different ways, for example, by measuring integrity Condition of the valve under operating conditions, by selecting from predefined values, e.g. from a matrix with defined values for different ones Valve designs and operating conditions, from a map determination, i.e. a computational determination from valve data and operating data, such as delivery pressure, Fluid, etc., and the like.
  • the mean are formed from a number of pump strokes.
  • This will be the automatic Early disturbance detection method according to the invention insensitive to short-term disturbances. This can e.g. be useful if contaminated fluids be metered by the pump in question. By fluid particles between Valve seat and valve closing body are inadvertently pinched, it comes at individual pump strokes to a fluid backflow, but because only temporarily and temporarily, not yet displayed as a fault should.
  • a further embodiment of the method according to the invention may consist in that of a number of pump strokes before their further signal processing a certain number of pump strokes with extreme values or not plausible values.
  • the signal values of 100 pump strokes can be detected, with three pump strokes with the highest as well with the lowest individual values sorted out.
  • the average value is formed from the remaining 94 values.
  • valve internals these are in particular fittings on the valve seat, the purpose of which is due to the leakage backflow to be excited to vibrate, to amplify the structure-borne sound signal to reach.
  • the inventively provided device for carrying out the described Method is provided with a connected to a pump component Measuring device, which by a leaking valve due to the backflow the delivery fluid in the closed valve state generated increased operating noise monitored and measures as RMS signal level, and with a with the Measuring device connected comparison device, which the RMS signal level with an operating noise of the pump with intact valves formed Reference signal level compares and at a predetermined level deviation or change generates a fault message as early fault detection.
  • the measuring device has at least one sensor for detection of the structure-borne noise generated by the operating noise of the pump.
  • This structure-borne sound sensor can be a vibration acceleration sensor, preferably be piezoelectric.
  • the measuring device either on the pump head, in particular at a central point thereof, be connected.
  • the measuring device directly on or near the pump valves, i.e. the suction and pressure valve and the other hydraulic valves, provided.
  • the structure-borne sound signal generated by suitable fittings are reinforced in the valve seat.
  • a Vibration device provided, which is provided at or near the valve seat is.
  • Such a vibrating device may consist of at least one obliquely in the Valve built-in wing or consist of a membrane sheet metal ring, the is installed in the valve seat.
  • a measuring device 5 is provided, which at a central Place the pump cover 6 is connected and that of a leaking valve 3 or 4 due to the backflow of the conveying fluid in the closed valve state monitored increased operating noise as well as RMS signal level measures.
  • the measuring device 5 is for measuring each generated by the operating noise Structure-borne sound and has a corresponding sensor. This is a piezoelectric working in the illustrated embodiment Vibration acceleration sensor.
  • a comparison device 7 which of the measuring device 5 supplied via a signal line 8 RMS signal level with a from the operating noise of the pump with intact valves 3 and 4 formed Reference signal level compares and at a predetermined level deviation or change generates a fault message as early fault detection.
  • FIGS. 2a-2e the various diagrams show the characteristics of the diaphragm metering pump 1 according to FIG Fig. 2a shows the piston travel over time.
  • FIG. 2 b shows the pressure curve in the hydraulic chamber 9 of the pump 1, where clearly the characteristic course of the performed by the piston 10 Pressure stroke and the suction stroke of the membrane 11 (see Fig. 1) can be seen.
  • Fig. 2c the course of the designed by a pump 1 with intact valves 3 and 4 generated operating noise, as a structure-borne noise signal is measured, typically, with the course shown in Fig. 2c represents the reference signal level. This reproduces typical noise peaks, during the pressure stroke and suction stroke performed by the pump piston 10 be generated.
  • Fig. 2d shows the structure-borne sound profile of a pump 1 with defective Suction valve 3, which is typically performed during the piston 10 from Druckhubes appears in appearance, since in this case the suction valve 3 due to the occurred Leakage does not close exactly and thus an undesirable Leakage flow into the intake pipe permits.
  • FIG. 2e shows the structure-borne sound signal in a pump 1 Defective pressure valve 4. This results, as shown, during the suction stroke of Piston 10, since here the leaking pressure valve 4 is no longer reliable closes and an undesirable backflow in the form of a leakage flow in the fluid space 12 of the pump 1 allows.
  • FIGS. 3a and 3b show the level profile of the measured structure-borne sound signal in averaged form, wherein in Fig. 3a, the averaging period during several Pump strokes, i. so several times during the print stroke and the Suction stroke, is shown and the early fault detection due to a increased detected RMS signal level.
  • Fig. 3b shows the Waveform at an averaging period that is only a fraction the pump stroke cycle, in the case shown, only a specific one Time of the suction stroke, extends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
EP04011109.8A 2003-05-16 2004-05-10 Détection anticipée de pannes dans les soupapes de pompes Expired - Lifetime EP1477678B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10322220 2003-05-16
DE10322220A DE10322220C5 (de) 2003-05-16 2003-05-16 Störungsfrüherkennung an Pumpenventilen

Publications (4)

Publication Number Publication Date
EP1477678A2 true EP1477678A2 (fr) 2004-11-17
EP1477678A3 EP1477678A3 (fr) 2005-06-29
EP1477678B1 EP1477678B1 (fr) 2007-02-21
EP1477678B2 EP1477678B2 (fr) 2017-04-19

Family

ID=32946466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04011109.8A Expired - Lifetime EP1477678B2 (fr) 2003-05-16 2004-05-10 Détection anticipée de pannes dans les soupapes de pompes

Country Status (4)

Country Link
US (1) US7069183B2 (fr)
EP (1) EP1477678B2 (fr)
AT (1) ATE354730T1 (fr)
DE (2) DE10322220C5 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007099057A2 (fr) * 2006-02-28 2007-09-07 Auma Riester Gmbh+Co. Kg Procédé et dispositif pour la surveillance, le diagnostic ou le réglage d'un actionneur servant à actionner une garniture
DE102006055747A1 (de) * 2006-11-25 2008-05-29 Abb Ag Verfahren und Anordnung zur Diagnose eines Stellorgans
DE102010034798A1 (de) 2009-09-02 2011-03-03 Schaeffler Technologies Gmbh & Co. Kg Ventilüberwachung an Pumpen mit mindestens zwei Zylindern
DE102010034800A1 (de) 2009-09-02 2011-03-24 Schaeffler Technologies Gmbh & Co. Kg Ventilüberwachung an Pumpen mit mindestens zwei Zylindern
CN104895714A (zh) * 2015-03-12 2015-09-09 肖光生 汽油缸内直喷
CN105822537A (zh) * 2016-04-12 2016-08-03 齐轩 一种隔膜泵橡胶隔膜的疲劳试验装置
CN108661891A (zh) * 2018-05-09 2018-10-16 浙江工业大学 一种低成本隔膜计量泵隔膜破损泄漏检测方法

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GB0411447D0 (en) * 2004-05-21 2004-06-23 Navitas Uk Ltd Valve monitoring system
DE102005017240A1 (de) 2005-04-14 2006-10-19 Alldos Eichler Gmbh Verfahren und Vorrichtung zur Überwachung eines mittels einer Pumpe geförderten Fluidstromes
US7693684B2 (en) 2005-10-17 2010-04-06 I F M Electronic Gmbh Process, sensor and diagnosis device for pump diagnosis
DE102005059566B4 (de) * 2005-12-13 2022-04-21 Brueninghaus Hydromatik Gmbh Vorrichtung und Verfahren zur zustandsabhängigen Wartung von hydrostatischen Verdrängereinheiten
US8147211B2 (en) * 2006-01-03 2012-04-03 General Electric Company Method and system for monitoring a reciprocating compressor valve
US20070185659A1 (en) * 2006-02-09 2007-08-09 Daniel Industries, Inc. Apparatus and method for detecting valve mechanical effectiveness in a chemical composition analyzer
US7643945B2 (en) 2006-12-28 2010-01-05 Schlumberger Technology Corporation Technique for acoustic data analysis
DE102007030248B4 (de) 2007-06-29 2022-09-29 Robert Bosch Gmbh Verfahren zur Bestimmung des Volumenstroms einer Kolbenpumpe
DE102008037393B4 (de) 2008-09-25 2015-01-22 Friedrich-Alexander-Universität Erlangen-Nürnberg Verfahren zur Früherkennung von Ventilschäden in oszillierenden Verdrängerpumpen und oszillierende Verdrängerpumpen mit integrierter Sensorik zur Verwendung in diesen Verfahren
CA2741195C (fr) * 2008-10-22 2017-05-23 Debiotech S.A. Pompe a fluide mems avec capteur de pression integre, destinee a detecter un dysfonctionnement
US20100300683A1 (en) * 2009-05-28 2010-12-02 Halliburton Energy Services, Inc. Real Time Pump Monitoring
DK2386027T3 (en) 2010-02-23 2019-04-08 Artemis Intelligent Power Ltd WORKING MACHINE WITH FLUIDUM AND PROCEDURE FOR OPERATING A WORKING MACHINE WITH FLUIDUM
GB2477997B (en) 2010-02-23 2015-01-14 Artemis Intelligent Power Ltd Fluid working machine and method for operating fluid working machine
NO336024B1 (no) * 2010-11-22 2015-04-20 Nat Oilwell Varco Norway As Fremgangsmåte for å oppdage og lokalisere en fluidlekkasje i forbindelse med en stempel-maskin
MX351596B (es) * 2011-08-25 2017-10-20 Ecolab Inc Bomba de diafragma para dosificar un fluido capaz de desgasificar automaticamente y un metodo acorde.
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CN103994062A (zh) * 2014-05-13 2014-08-20 山东理工大学 液压泵故障特征信号提取方法
CN105203390A (zh) * 2015-10-27 2015-12-30 苏州听毅华自动化设备有限公司 一种用于潜水泵泵盖检测的试压机台架
US10378537B2 (en) 2016-10-06 2019-08-13 Caterpillar Inc. System for detecting failure location in a pump
US10890061B2 (en) 2018-08-23 2021-01-12 Caterpillar Inc. Rig management system for analyzing a pump valve of a hydraulic fracturing system
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CN111238797B (zh) * 2020-02-28 2022-04-29 大唐清苑热电有限公司 用于截止阀、调节阀在线研磨后密封面验收检测的方法
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007099057A2 (fr) * 2006-02-28 2007-09-07 Auma Riester Gmbh+Co. Kg Procédé et dispositif pour la surveillance, le diagnostic ou le réglage d'un actionneur servant à actionner une garniture
WO2007099057A3 (fr) * 2006-02-28 2007-11-15 Auma Riester Gmbh & Co Kg Procédé et dispositif pour la surveillance, le diagnostic ou le réglage d'un actionneur servant à actionner une garniture
DE102006055747A1 (de) * 2006-11-25 2008-05-29 Abb Ag Verfahren und Anordnung zur Diagnose eines Stellorgans
US8122905B2 (en) 2006-11-25 2012-02-28 Abb Ag Method and arrangement for diagnosis of a final control element
DE102006055747B4 (de) 2006-11-25 2021-08-26 Abb Ag Verfahren und Anordnung zur Diagnose eines Stellorgans
DE102010034798A1 (de) 2009-09-02 2011-03-03 Schaeffler Technologies Gmbh & Co. Kg Ventilüberwachung an Pumpen mit mindestens zwei Zylindern
DE102010034800A1 (de) 2009-09-02 2011-03-24 Schaeffler Technologies Gmbh & Co. Kg Ventilüberwachung an Pumpen mit mindestens zwei Zylindern
CN104895714A (zh) * 2015-03-12 2015-09-09 肖光生 汽油缸内直喷
CN105822537A (zh) * 2016-04-12 2016-08-03 齐轩 一种隔膜泵橡胶隔膜的疲劳试验装置
CN108661891A (zh) * 2018-05-09 2018-10-16 浙江工业大学 一种低成本隔膜计量泵隔膜破损泄漏检测方法
CN108661891B (zh) * 2018-05-09 2019-07-30 浙江工业大学 一种低成本隔膜计量泵隔膜破损泄漏检测方法

Also Published As

Publication number Publication date
EP1477678A3 (fr) 2005-06-29
US20040226346A1 (en) 2004-11-18
DE10322220C5 (de) 2010-10-14
EP1477678B1 (fr) 2007-02-21
ATE354730T1 (de) 2007-03-15
DE502004002932D1 (de) 2007-04-05
US7069183B2 (en) 2006-06-27
DE10322220B3 (de) 2004-10-07
EP1477678B2 (fr) 2017-04-19

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