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WO2019081076A1 - Procédé et dispositif pour déterminer la force de traction contenue dans un moyen de support, de transport ou de traction - Google Patents

Procédé et dispositif pour déterminer la force de traction contenue dans un moyen de support, de transport ou de traction

Info

Publication number
WO2019081076A1
WO2019081076A1 PCT/EP2018/068862 EP2018068862W WO2019081076A1 WO 2019081076 A1 WO2019081076 A1 WO 2019081076A1 EP 2018068862 W EP2018068862 W EP 2018068862W WO 2019081076 A1 WO2019081076 A1 WO 2019081076A1
Authority
WO
WIPO (PCT)
Prior art keywords
free
trumlänge
circulation
deflection
rollers
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.)
Ceased
Application number
PCT/EP2018/068862
Other languages
German (de)
English (en)
Inventor
Tim Fiss
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.)
ContiTech Antriebssysteme GmbH
Original Assignee
ContiTech Antriebssysteme 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
Application filed by ContiTech Antriebssysteme GmbH filed Critical ContiTech Antriebssysteme GmbH
Publication of WO2019081076A1 publication Critical patent/WO2019081076A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1215—Checking means specially adapted for ropes or cables

Definitions

  • the invention relates to a method for determining the tensile force in a
  • discontinuously operated carrying, conveying or traction means which rotates about guide or deflection devices, preferably deflection rollers or idlers.
  • an apparatus for carrying out the method, and its use in tensile drifts and elevator installations Such supporting, conveying or traction means, also referred to as traction means are generally subjected to high loads, so that it is desirable on the one hand to determine the tensile force or tensile load to determine the load spectrum and thus to determine the life and replacement intervals.
  • load peaks or different tensile force distributions may occur in the case of traction means arranged in parallel or multiply, the knowledge of which is important in order to counteract partial overloads.
  • the pulleys are required to guide and deflect the traction means so that drive rollers, driven rollers, clamping devices, etc. remain in compliance with the regulations and at the same time the spatial and geometric features, the
  • the running speed of the support means substantially corresponds to the peripheral speed of the traction sheave and is provided by possibly provided pulleys to an integer fraction of the
  • Transfer driving speed of the car is therefore basically determined by the number of pulleys on the elevator car and counterweight.
  • Pulleys can also be here be used, but not those that change the translation or ratio in the sense of a pulley.
  • the ends of the rope are, for example, on the ceiling of a
  • Speed of the suspension element is then twice as high as the speed of travel of the car in the shaft.
  • suspensions which are also classified by the ratio of the two speeds mentioned or basically by the number of effective in the sense of a pulley pulleys on elevator car or counterweight to let.
  • the object of the invention was therefore to provide a method and a device by means of which the measurement of the tensile forces in such systems during operation is made possible or simplified, wherein for measuring the tensile forces also in individual traction means or belts running in parallel inexpensive and easy to integrate in the existing lifts, insensitive to contamination and long-term stable measuring method and measuring device is available.
  • a free partial length or strand length of the carrying, conveying or traction means located between two adjacent and at a fixed distance from one another arranged guide or deflection means during the circulation to a
  • Oscillation of defined frequency is excited, i. E. an excitation frequency / excitation oscillation is applied to the running, moving, operating part of the carrying, conveying or traction means.
  • the frequency of the then decaying natural oscillation of the partial length or of the run is then measured and, in turn, the tensile force is determined using known calculation methods.
  • the advantage of such a method is that you can use the space between the bearing surfaces or support points of the traction means on the pulleys as a predetermined fixed part length of the traction device, although the traction means can move as such and continue to run in its normal operation. Then a possible stop the traction device and then taking place decay of
  • Self-oscillation is sufficient to calculate the tensile force using known methods.
  • the usual two-sided fixed clamping is thus replaced in the inventive solution by the stationary under tension support of the traction means on a pulley.
  • excitation by contact can of course, as provided in a further advantageous embodiment, also represent a possibility and consist in that during the orbiting a direct vibration excitation of the free partial length or free Trumat done by striking or picking. This is easily possible with not too fast running traction means, especially if the
  • Vibration excitation occurs shortly before stopping.
  • the determination of the tensile force can thus be carried out with sufficient accuracy by measuring the natural frequency even with parallel guided traction means on each belt ring.
  • the tensile force is then determined from the natural frequency of the free-swinging belt, the length of the belt and the meter weight of the belt.
  • the meter weight is known for the belts used. For example, a strand of defined length can be fixedly mounted on the roof of an elevator car
  • a further advantageous embodiment consists in that the measurement of the frequency of the then decaying natural vibration takes place contactlessly by a sensor assigned to the partial length or the run length, preferably by an optical laser sensor.
  • a sensor assigned to the partial length or the run length preferably by an optical laser sensor.
  • Such sensors are very small and usually have only a single cable inlet, so that even in tight spaces here is an easy to install solution is possible.
  • a further advantageous embodiment is that the support, conveying or traction means has metallic reinforcing elements or tension members and the evanescent
  • Natural vibration is measured by one of the partial length or the Trumwin adjacent associated eddy current sensor or a capacitive sensor.
  • a sensor is to install in multiple designs and at low cost and also consists usually of standardized components.
  • it is also possible to detect the decaying natural oscillation by means of an acoustic sensor adjacent to the partial length or the trum length, for example by means of a microphone suitable for receiving corresponding sound pressure waves.
  • the eddy current sensor placed above the belt drum precisely detects the vibration by the eddy current effects of the vibrating steel cords of the free one
  • 1 F A ⁇ m I 2 Tr um. ) 2
  • L strand free partial length (strand length) between two pulleys [m]
  • the tensile force values determined for each elevator belt are then advantageously available both absolutely as a function value and relative to one another for detecting uneven load distribution directly in the control.
  • An advantageous device for carrying out the method for determining the tensile force in a suspension means of an elevator installation wherein the support means is preferably designed as a support belt or support strap with embedded and extending in the longitudinal direction of strength members, has two spaced apart at a fixed distance pulleys for the support means, between which there is a free
  • Trum the suspension element is located.
  • One of the pulleys is mounted eccentrically so that during the rotation of the roller, a periodic deflection of the free Trumin, preferably perpendicular to the longitudinal extent of the strand.
  • the free Trumin between the pulleys is set to the excitation frequency in vibration.
  • the device furthermore has a sensor associated with the free run length between the deflection rollers for detecting the decaying natural vibration of the free run length after a stop of the lift.
  • a further advantageous embodiment is that the deflection rollers limiting the free strand length are arranged on the elevator car, preferably being mounted on the car roof.
  • the method can also be used advantageously in a tension belt drive, in which a preferably endless tension belt via pulleys, drive and possibly
  • Back rollers is deflected and in which a between two spaced at a fixed distance pulleys or trained between pulley and back roller free part length / free strand during the circulation to a vibration of defined frequency is excited.
  • Lift shafts results from the use for the first time the possibility of a precise inspection of all individual parallel tension belts.
  • Fig. 1 an elevator installation with a device according to the invention in
  • FIG. 2 in a schematic representation of the tensile force measurement with a
  • FIG. 1 shows a schematic representation of an elevator installation 1 in a 2: 1 suspension, in which a support means designed as a support belt 2 for an elevator car 3 is provided.
  • the support belt 2 is u.a. deflected and guided over the pulleys 4 and 4a.
  • the support belt 2 is provided with embedded and extending in the longitudinal direction metallic strength members.
  • Fig. 2 illustrates the basic structure of the device provided for this purpose to carry out the method for determining the tensile force.
  • Elevator car 3 arranged, namely mounted on the cabin roof.
  • One of the pulleys here the guide roller 4, is mounted so eccentrically that during the circulation of the roller a periodic deflection of the free Trumat takes place, preferably perpendicular to the longitudinal extent of the strand, as by the
  • Vibration movement hinting double arrow 6 is outlined.
  • the free Trumle between the pulleys 4 and 4a is set at the excitation frequency in vibration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Abstract

L'invention concerne un procédé pour déterminer la force de traction contenue dans un moyen de support, de transport ou de traction en discontinu, qui tourne autour des dispositifs de guidage ou de déviation, de préférence des poulies de renvoi ou des poulies de support, une longueur partielle libre située entre deux dispositifs de guidage ou de déviation adjacents disposés à une distance ferme les uns des autres et/ou une longueur travée du moyen de support, de transport ou de traction est incitée pendant la circulation vers une oscillation d'une fréquence définie (fréquence d'incitation / oscillation d'incitation) et après un arrêt de la circulation, la fréquence de l'auto-oscillation évanescente de la longueur partielle et/ou du brin est mesurée et la force de traction est ainsi déterminée.
PCT/EP2018/068862 2017-10-27 2018-07-12 Procédé et dispositif pour déterminer la force de traction contenue dans un moyen de support, de transport ou de traction Ceased WO2019081076A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017219304.2 2017-10-27
DE102017219304.2A DE102017219304A1 (de) 2017-10-27 2017-10-27 Verfahren und Vorrichtung zur Bestimmung der Zugkraft in einem Trag-, Förder- oder Zugmittel

Publications (1)

Publication Number Publication Date
WO2019081076A1 true WO2019081076A1 (fr) 2019-05-02

Family

ID=63259481

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/068862 Ceased WO2019081076A1 (fr) 2017-10-27 2018-07-12 Procédé et dispositif pour déterminer la force de traction contenue dans un moyen de support, de transport ou de traction

Country Status (2)

Country Link
DE (1) DE102017219304A1 (fr)
WO (1) WO2019081076A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540271A (en) * 1968-11-08 1970-11-17 Don G Hoff Load measuring method and apparatus
WO2001083350A1 (fr) * 2000-05-01 2001-11-08 Inventio Ag Moyen de suspension de charge destine a des monte-charges a cables dotes d'un dispositif de mesure de charge integre
WO2007125781A1 (fr) * 2006-04-28 2007-11-08 Toshiba Elevator Kabushiki Kaisha Amortisseur
US20120061190A1 (en) * 2010-09-09 2012-03-15 Bruegger Beat Load measuring device for an elevator installation
DE102014222944A1 (de) * 2014-11-11 2016-05-12 Contitech Antriebssysteme Gmbh Verfahren und Vorrichtung zur Bestimmung eines Spannungszustandes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540271A (en) * 1968-11-08 1970-11-17 Don G Hoff Load measuring method and apparatus
WO2001083350A1 (fr) * 2000-05-01 2001-11-08 Inventio Ag Moyen de suspension de charge destine a des monte-charges a cables dotes d'un dispositif de mesure de charge integre
WO2007125781A1 (fr) * 2006-04-28 2007-11-08 Toshiba Elevator Kabushiki Kaisha Amortisseur
US20120061190A1 (en) * 2010-09-09 2012-03-15 Bruegger Beat Load measuring device for an elevator installation
DE102014222944A1 (de) * 2014-11-11 2016-05-12 Contitech Antriebssysteme Gmbh Verfahren und Vorrichtung zur Bestimmung eines Spannungszustandes

Also Published As

Publication number Publication date
DE102017219304A1 (de) 2019-05-02

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