WO1993019317A1 - Procede et dispositif visant a controler l'aptitude au fontionnement d'un element de robinetterie commande par un organe motorise - Google Patents

Procede et dispositif visant a controler l'aptitude au fontionnement d'un element de robinetterie commande par un organe motorise Download PDF

Info

Publication number
WO1993019317A1
WO1993019317A1 PCT/EP1993/000641 EP9300641W WO9319317A1 WO 1993019317 A1 WO1993019317 A1 WO 1993019317A1 EP 9300641 W EP9300641 W EP 9300641W WO 9319317 A1 WO9319317 A1 WO 9319317A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle
force
torque
valve
test force
Prior art date
Application number
PCT/EP1993/000641
Other languages
German (de)
English (en)
Inventor
Klaus Fischer
Original Assignee
Elektro-Mechanik Gmbh
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.)
Filing date
Publication date
Priority claimed from DE19924208667 external-priority patent/DE4208667A1/de
Application filed by Elektro-Mechanik Gmbh filed Critical Elektro-Mechanik Gmbh
Publication of WO1993019317A1 publication Critical patent/WO1993019317A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0061—Force sensors associated with industrial machines or actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters

Definitions

  • the invention relates to a method and a device for checking the functionality of a valve, in particular for determining the coefficient of friction and the forces that occur on a valve stem; which is adjustable by an actuator by means of a torque.
  • fittings such as valves, slides and flaps are required to shut off lines, the fitting having to work reliably for safety reasons when required.
  • the drive torque into the spindle longitudinal force required to actuate, for example, the valve plate of a valve, the state of the stuffing box, which surrounds and seals the spindle, the state of the spindle nut to which the drive torque acts, and the remote actuator efficiency for valves with remote control play a significant role Role.
  • the invention is based on the object of proposing a method by means of which the functionality of a valve can be checked and in particular the coefficients of friction can be determined, and an apparatus for carrying out the method.
  • This object is achieved according to the invention by a method in which a test force is applied to the spindle during the adjustment movement of the valve of the valve, the different torque or the different drive power being used for the different test forces for the Drive the spindle is required, the coefficient of friction of the valve or the force actually acting on the spindle are determined.
  • remedial measures can be carried out on the valve in good time so that there is no longer any risk of malfunction in the event of a request.
  • Fig. 1 shows schematically an armature with an inventive
  • Fig. 2 shows the course of drive torque, test force and
  • FIG. 3 shows another embodiment of the measuring device
  • FIG. 4 shows a diagram of drive power and test force
  • FIG. 5 shows a further representation of the test force in connection with the reserve force
  • Fig. 6 shows another embodiment of the measuring device.
  • a valve 2 arranged in a pipeline 1 is shown schematically as a fitting, the spindle 5 of which can be adjusted by an actuator 3 into the open or closed position shown.
  • the spindle 5 of this fitting is provided with a thread with which a spindle nut 4 is engaged.
  • the spindle nut 4 is set in rotation by an electric motor (not shown) of the actuator 3 via a gear, so that the spindle 5 is adjusted in the axial direction.
  • a measuring device 7 is attached to such a fitting, which in the exemplary embodiment shown comprises a piston 8 attached to the free end of the spindle 5, which can be displaced in a cylinder 9 filled with hydraulic fluid, which at a fixed point 10 has a force measurement ⁇ device 11 is supported.
  • a connecting line 12 is provided between the upper and lower cylinder spaces 13 and 14, in which a throttle valve 15 is arranged, the throttle cross section of which can be changed by an adjusting device 20.
  • a signal output of the force measuring device 11 is indicated, which is connected to a display device 17, for example a storage oscilloscope.
  • the signal output 16 is also expediently connected to a data processing device 18 which is connected to a memory 21 and the adjusting device 20.
  • the actuator 3 is connected to a device 22 for measuring the torque exerted by the actuator, which is also connected to a memory 23.
  • valve 2 by a torque acting on the spindle nut 4 of the actuator .; 3 is opened, the Piston 8 hydraulic fluid from the cylinder space 13 via the throttle 15 in the line 12 into the cylinder space 14.
  • the cylinder 9 is pressed against the fixed point 10 with a certain pressure force, depending on the degree of opening of the throttle 15.
  • This pressure force with which the cylinder 9 is pressed against the fixed point 10 can be set via the throttle 15 and the force measuring device 11 can be measured.
  • This compressive force corresponds to a test force P which acts coaxially on the spindle 5.
  • R is the bushing force required to overcome the friction of the stuffing box.
  • the coefficient of friction ⁇ of the spindle nut 4 can be determined, where d F is the flank diameter of the thread, h is the thread pitch and cos ⁇ corresponds to half the flank angle of the thread.
  • the evaluation can take place in the data processing device 18 on the basis of the measured values stored in the memories 21 and 23 or on the basis of the stored measured values in a separate data processing device.
  • the specified boundary conditions such as pressure in line 1 and weight of spindle 5, are taken into account for the various test forces P.
  • the change in the test force P during an adjustment stroke of the valve can be measured in short time intervals, whereupon the individual measurement signals are stored and / or displayed as a control function. This makes it possible to achieve a reliable detection and storage of the measured values forming the control function within the predetermined measuring time despite a limited data processing speed of the data processing device 18.
  • a spring can be arranged between the spindle end and the force measuring device 11.
  • a test force P results as a function of the path or the time, which can be measured via the signal output 16 of the force measuring device 11, in accordance with the characteristic curve of the spring or a corresponding spring assembly.
  • a plurality of cylinders 9 or a plurality of spring assemblies can be arranged around the spindle between the stuffing box and the actuator, each cylinder or spring assembly being assigned a force measuring device.
  • the cylinders or springs are arranged around the spindle so that the resulting test force P lies on the spindle axis.
  • the spring packs can be exchangeable to change the test force.
  • the range of spring characteristics can be changed by a spring adjustment device.
  • Fig. 3 shows another embodiment of the measuring device, wherein the cylinder 9 is supported directly at the fixed point 10 and a pressure gauge 24 is provided on both sides of the throttle 15.
  • the two pressure gauges are connected to the data processing device 18, so that the test force P can be determined via the pressure determined in the two cylinder spaces 13 and 14.
  • FIG. 3 shows a slide 2 with a slide plate 25 immersed in the pipeline 1 instead of the valve disk shown in FIG. 1. Furthermore, a spring key is shown at 26, by means of which the spindle nut 4 is connected to the actuator 3 and which can be removed to release this connection.
  • the electric drive motor of the actuator 3 is schematically indicated, which is connected to a device 28 for measuring the power of the drive motor.
  • This device 28 is connected to a data processing device 29.
  • a switch for switching off the power supply of the drive motor 27 is shown at 30.
  • a torque switch 31 is provided, which is set to a specific torque value, upon reaching which the drive motor 27 is switched off via the switch 30.
  • the drive power L 0 of the drive motor is first measured without connection to the spindle nut 4 by removing the spring key 26, that is to say the idling power. Then the drive power ⁇ is measured when the actuator 3 is connected by the spring key 26 to the spindle nut 4 and no test force is applied. The drive power L 2 is then measured when a test force P 2 loads the spindle, which is in the order of the stuffing box friction force. In this area of little change in the test force, the spindle nut friction coefficient can be regarded as constant.
  • the difference L ⁇ - L 0 is a measure of the stuffing box friction force in the axial direction of the spindle.
  • the test force P 2 is applied in such a way that a performance increase from L x to L 2 equals ⁇ - L 0 .
  • the increase in performance from L to L 2 is proportional to the increase in test force from P x to P 2 .
  • the power value L L j ⁇ + (L j ⁇ - L 0 ) corresponds to a test force P x that corresponds to the gland friction force sought, as shown in FIG. 4.
  • the spindle nut efficiency is not taken into account here, since it is the same for L x and L 2 .
  • the total longitudinal force acting on the spindle is composed of the stuffing box friction force and the test force, the stuffing box friction force being determined by a value of the drive power which is required to overcome the stuffing box friction force. This performance value is expressed in the form of a corresponding test force.
  • the friction coefficient ⁇ of the spindle nut 4 can be determined by equations 1 and 5 with the aid of the switch-off torque of the torque switch 31 and the associated test force P.
  • the actuating force reserve F st running parallel to the time axis t is the force available at point 32 on the lower edge of the stuffing box 6.
  • the reserve force is essentially equal to the test force P that occurs when the torque switch switches off at a line pressure of 0 and a stationary line medium.
  • the actuating force reseve F st is obtained by setting the torque switch 31, which opens the switch 30 for the power supply of the drive motor 27 when the maximum permissible torque occurs, to the maximum permissible torque, which is the weakest at the one known from the strength calculation Link of the drive chain may attack.
  • a torque switch set in this way prevents the functionality of the valve from being jeopardized during recurring tests if, for example, a travel limit switch (not shown), which is usually connected upstream of the torque switch 31 and fails to switch off the motor when the valve reaches a certain stroke position.
  • a solenoid valve 33 arranged in line with the throttle valve 15 in line 12 can be provided to simulate the end stop of the valve or to simulate a stroke limitation, by means of which line 12 can be shut off. so that the piston 8 can no longer displace hydraulic fluid through the line 12 and is held in position by a stop.
  • the set by the The maximum possible torque which is decisive for the strength and acts on the spindle, is measured via the pressure gauge 24 or the force measuring device 11.
  • the coefficient of friction of the slide plate 25 of the slide 2 can be determined if there is a known pressure difference ⁇ p on both sides of the slide plate 25 in the pipeline 1.
  • the measuring functions of the actuating force reserve F ⁇ t , the test force P (t) and the differential pressure ⁇ p (t) are used.
  • d D is the sealing diameter of the sealing plate
  • F ⁇ UF ⁇ Spi n de l 2 * ⁇ / 4 * p S, i.e. the pressure force that acts on the spindle in the opening direction due to the line pressure PS.
  • FIG. 6 schematically shows a further embodiment of the measuring device for a fitting, in which a valve flap, not shown, is slowly pivoted by the rotating spindle.
  • a lever 35 is attached to the spindle 5 and acts on the piston 8 with its free end.
  • the torque M occurring on the spindle 5 can be determined from the test force P times the length of the lever 35.
  • the test force can be measured as in Fig. 1 by a force measuring device or as in Fig. 3 by the pressure in the cylinder chambers. In this measuring device according to FIG. 6, the test force is increased until the torque switch 31 responds. As a result, the torque actually occurring on the valve spindle can be measured, regardless of the efficiency of a gearbox of the actuator 3.
  • a spring with a force measuring device 11 can also be provided for applying a test force.

Abstract

Dans un élément de robinetterie muni d'une broche, qui peut être réglée par un organe motorisé au moyen d'un couple, une force de vérification supplémentaire est appliquée afin de contrôler l'aptitude au fonctionnement de l'élément, les coefficients de frottement de l'élément étant obtenus à partir du couple différent ou de la puissance motrice différente qui sont l'un ou l'autre nécessaires pour diverses forces de vérification, afin d'entraîner la broche.
PCT/EP1993/000641 1992-03-18 1993-03-18 Procede et dispositif visant a controler l'aptitude au fontionnement d'un element de robinetterie commande par un organe motorise WO1993019317A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4208667.1 1992-03-18
DE19924208667 DE4208667A1 (de) 1992-03-18 1992-03-18 Verfahren zur ermittlung der spindelmutter- und stopfbuchsreibung von armaturen mit elektrischem stellantrieb und messanordnung zur durchfuehrung des verfahrens
DEP4224902.3 1992-07-28
DE19924224902 DE4224902A1 (de) 1992-03-18 1992-07-28 Verfahren zur Ermittlung der Spindelmutter- und Stopfbuchsreibung von Armaturen mit elektrischem Stellantrieb und Meßanordnung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO1993019317A1 true WO1993019317A1 (fr) 1993-09-30

Family

ID=25912949

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/000641 WO1993019317A1 (fr) 1992-03-18 1993-03-18 Procede et dispositif visant a controler l'aptitude au fontionnement d'un element de robinetterie commande par un organe motorise

Country Status (2)

Country Link
DE (1) DE4224902A1 (fr)
WO (1) WO1993019317A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0748970A2 (fr) * 1995-06-13 1996-12-18 ARI-ARMATUREN ALBERT RICHTER GmbH & Co.KG. Procédé et appareil pour l'amortissement de la levée d'une soupape à ressort
WO1997044645A2 (fr) * 1996-05-21 1997-11-27 L-Plan, Podjetje Za Projektiranje, Meritve In Prodajo, D.O.O. Dispositif d'essai pour soupapes de securite
US11543314B2 (en) * 2018-08-23 2023-01-03 Stabilus Gmbh Measurement of operating parameters on actuators

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512238A1 (de) * 1995-03-31 1996-10-02 Istec Gmbh Verfahren zur Überwachung und zum Betrieb von insbesondere motorgetriebenen Armaturen
DE19643096C2 (de) * 1995-10-20 1999-11-18 Preussag Wasser Und Rohrtechni Vorrichtung und Verfahren zum Messen von Spindelkräften an Armaturen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542649A (en) * 1983-07-19 1985-09-24 Charbonneau And Godfrey Associates Motor operated valve analysis and testing system
US4831873A (en) * 1986-04-04 1989-05-23 Movats Incorporated Method and apparatus for remote monitoring of valves and valve operators
US5174152A (en) * 1991-03-06 1992-12-29 Wohld Peter R Power operated valve stem thrust verification test system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542649A (en) * 1983-07-19 1985-09-24 Charbonneau And Godfrey Associates Motor operated valve analysis and testing system
US4831873A (en) * 1986-04-04 1989-05-23 Movats Incorporated Method and apparatus for remote monitoring of valves and valve operators
US5174152A (en) * 1991-03-06 1992-12-29 Wohld Peter R Power operated valve stem thrust verification test system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0748970A2 (fr) * 1995-06-13 1996-12-18 ARI-ARMATUREN ALBERT RICHTER GmbH & Co.KG. Procédé et appareil pour l'amortissement de la levée d'une soupape à ressort
EP0748970A3 (fr) * 1995-06-13 1997-11-26 ARI-ARMATUREN ALBERT RICHTER GmbH & Co.KG. Procédé et appareil pour l'amortissement de la levée d'une soupape à ressort
WO1997044645A2 (fr) * 1996-05-21 1997-11-27 L-Plan, Podjetje Za Projektiranje, Meritve In Prodajo, D.O.O. Dispositif d'essai pour soupapes de securite
WO1997044645A3 (fr) * 1996-05-21 1998-01-22 Plan Podjetje Za Projektiranje Dispositif d'essai pour soupapes de securite
US11543314B2 (en) * 2018-08-23 2023-01-03 Stabilus Gmbh Measurement of operating parameters on actuators

Also Published As

Publication number Publication date
DE4224902A1 (de) 1994-02-03

Similar Documents

Publication Publication Date Title
DE112007003560T5 (de) Flüssigkeitsventilanordnung
DE102013207934A1 (de) Schaltpilot und Verfahren zum Betrieb eines Schaltpiloten
DE102012220178B4 (de) Verfahren zur Fehlerdetektierung in einem hydraulischen Kupplungsbetätigungssystem
EP1847719A2 (fr) Procédé de détermination de la pression d'actionnement d'un vérin
DE102010036711A1 (de) Prozessventil mit Kraftmesseinrichtung
EP2583072B1 (fr) Banc d'essai de freinage doté d'un actionneur de frein électrique
EP0928388B1 (fr) Clapet de turbine
WO2016078939A1 (fr) Procédé pour faire fonctionner un dispositif de boîte de vitesses automatique ainsi que dispositif de boîte de vitesses automatique correspondant
EP1456553B1 (fr) Procede de determination du point d'application d'un embrayage
DE102014223037A1 (de) Parksperrenaktuator für eine Parksperre eines Kraftfahrzeug-Automatgetriebes
WO1993019317A1 (fr) Procede et dispositif visant a controler l'aptitude au fontionnement d'un element de robinetterie commande par un organe motorise
DE102014223479B3 (de) Verfahren zur Einstellung einer Anschlagposition eines hydrostatischen Kupplungsaktors
DE19537158C2 (de) Prüfstand für Kraftfahrzeuge
DE102015225999A1 (de) Verfahren zum Überprüfen des Zustandes eines Ventils
EP0666970B1 (fr) Systeme de controle de l'aptitude au fonctionnement d'un accessoire de robinetterie entraine par un actionneur
DE102008008458A1 (de) Ausrückvorrichtung zur Betätigung einer Kupplung
DE102006052376A1 (de) Verfahren zur Bestimmung eines Druckstückspiels
DE102004046870B4 (de) Verfahren und Vorrichtung zur Funktionsfeststellung eines Federelements in einer Bremseinrichtung
DE10163287A1 (de) Verfahren und Vorrichtung zum Prüfen von Kraftschraubern
DE102022106708B4 (de) Verfahren und Vorrichtungen zur Nullpunktkalibration eines Drehmomentsensors eines Drehventils
DE102020104831B3 (de) Wasserkraftanlage mit Entlastungsventil
DE3538883A1 (de) Stelltrieb
EP0881414A1 (fr) Transmission de courroie à poulies coniques et à commande hydraulique
DE4228947C2 (de) Druckmodulator
DE102015216116B3 (de) Verfahren zur Ansteuerung einer Ventilanordnung und fluidisches System

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

122 Ep: pct application non-entry in european phase