EP0476459B1 - Dispositif de sécurité pour grues - Google Patents

Dispositif de sécurité pour grues Download PDF

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Publication number
EP0476459B1
EP0476459B1 EP91115098A EP91115098A EP0476459B1 EP 0476459 B1 EP0476459 B1 EP 0476459B1 EP 91115098 A EP91115098 A EP 91115098A EP 91115098 A EP91115098 A EP 91115098A EP 0476459 B1 EP0476459 B1 EP 0476459B1
Authority
EP
European Patent Office
Prior art keywords
rotation angle
cable drum
tachogenerators
values
angle
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 - Lifetime
Application number
EP91115098A
Other languages
German (de)
English (en)
Other versions
EP0476459A3 (en
EP0476459A2 (fr
Inventor
Arnold Dipl.-Ing. Axmann
Reinhold Pütt
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0476459A2 publication Critical patent/EP0476459A2/fr
Publication of EP0476459A3 publication Critical patent/EP0476459A3/de
Application granted granted Critical
Publication of EP0476459B1 publication Critical patent/EP0476459B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear

Definitions

  • the invention relates to a safety device on a crane in which at least one electric drive motor is mechanically coupled via gears to at least one cable drum, the drive motor being coupled to a speed sensor and to a rotation angle sensor, the cable drum is also coupled to a speed sensor and to a rotation angle sensor and wherein the speed sensors and rotary angle sensors are connected to an evaluation circuit which continuously monitors the values supplied by the speed sensors and the rotary angle sensors for the drive motor in relation to the values supplied for the cable drum and, in the event of a deviation from specified relations, emits a fault signal for an emergency shutdown .
  • co-rotating switches are mechanically coupled to the drive motor and the cable drum of a crane which, depending on the angular position, close or interrupt a circuit, the switches also being designed such that their respective Angular position is influenced by the speed. In the case of trouble-free operation, the switches alternately take over the current flow in the circuit, so that a continuous current flows. In the event of a fault, asynchronous rotations and deviations in the angular positions of the switches lead to interruptions in the current flow, which are detected in an evaluation circuit and used to trigger an emergency shutdown.
  • the invention is based on the object of specifying a simple and reliable safety device in which the individual sensors are additionally monitored.
  • the object is achieved in that the evaluation circuit additionally compares rotation angle values derived from the speed values of the speed sensors with the rotation angle values supplied by the respectively associated rotation sensor.
  • the evaluation circuit additionally compares rotation angle values derived from the speed values of the speed sensors with the rotation angle values supplied by the respectively associated rotation sensor.
  • the speed sensors are advantageously designed in the form of incremental sensors and the rotary angle sensors in the form of angle encoders.
  • the angle encoders use the values they generate to indicate absolutely the angle or the position, the output signals of the incremental encoders (angle increment encoders), each summed in a counter, also representing a measure of the path.
  • the monitoring will take place in such a way that directional pulses emitted by the incremental encoders are supplied to electronic counters and compared with one another. It must apply that the sum of the impulses given for the drive motors normally coincides with the sum of the impulses on the cable drums, whereby the one value has to be multiplied according to the gear ratio. If the speeds given by the drive motors do not follow the corresponding speeds on the cable drums, there is a fault in the mechanics and the drive must be stopped immediately.
  • the paths (angles) are simultaneously compared with one another via the angle encoders; what applies to the speed must also apply to the way.
  • an electric motor 1 of a hoist drives a cable drum 3 via a transmission 2.
  • An electrical incremental encoder 4 and an angle encoder 5 are mechanically coupled to the motor 1.
  • An incremental encoder 6 and an angle encoder 7 are coupled mechanically directly to the cable drum 3.
  • the output signals of the transmitters 4 to 7 are fed to an evaluation circuit 8 which emits a shutdown signal 9 in the event of a fault.
  • the output signals of the transmitters 4 to 7 are routed via matching circuits 19 and are available as signals at the outputs A, B, C, D of these matching circuits 19.
  • a pulse sequence is present at output A, which is derived from incremental encoder 4 and corresponds to the speed of motor 1.
  • the respective angle value (angle of rotation) of the drive motor 1, which is supplied by the angle encoder 5, is present at the output B.
  • the values at output A are compared with the values at output C in subtractor 22. If the difference in the speeds exceeds a predetermined limit value, then an assigned limit value indicator 24 responds and emits an interference signal.
  • the signals at the outputs B and D in the subtractor 21 are compared with one another and an interference signal is likewise output in the event of a deviation via limit value detectors 24.
  • the permissible differences between angles or speeds can be set differently. These measures described above are used to monitor whether the gears between the motor and drum are OK.
  • the encoders can now also be monitored, and this is based on the consideration that the time integral of the pulse sequence emitted by the angle stepper 4 must match the angle value supplied by the angle encoder 5.
  • the values supplied at the outputs A and B are compared with one another in a subtractor 20, both values having to be output in count form or in absolute form so that they are comparable. The easiest way to do this is for outputs A and C to also output the integrated speed values.
  • FIG. 3 shows the monitoring of a crane with four drive motors 10 to 13.
  • two drive motors 10 and 11 or 12 and 13 drive a planetary gear 14, which drives two cable drums 16 via further gears 15.
  • Incremental encoders 17 and angle encoders 18 are coupled to motors 10 to 13 and cable drums 16, respectively. From the output signals of the sensors, it can then be determined in the evaluation circuit whether there is any fault in the mechanics or in the sensors; For example, one will monitor whether the two motors 10 and 11 have the same speed or cover the same angle of rotation in the same period. The same applies to motors 12 and 13 with their assigned sensors. One will also monitor whether the sum of the driving speed of the motors 10th to 13 corresponds to the speed or the path of the drums 16, since this condition must be met in a planetary gear.
  • FIG. 3 is an expansion of the ideas explained at the beginning, the same basic structure of differential monitoring always remaining.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Control And Safety Of Cranes (AREA)

Claims (3)

  1. Dispositif de sécurité sur une grue, dans lequel au moins un moteur d'entraînement (1) électrique est couplé mécaniquement par l'intermédiaire d'une transmission (2) à au moins un tambour à câble (3), le moteur d'entraînement (1) étant couplé à un capteur (4) de la vitesse de rotation et à un capteur (5) de l'angle de rotation, le tambour à câble (3) étant également couplé à un capteur (6) de la vitesse de rotation et à un capteur (7) de l'angle de rotation et les capteurs (4, 6) de la vitesse de rotation et les capteurs (5, 7) de l'angle de rotation étant raccordés à un circuit d'évaluation (8), qui surveille en permanence les relations entre les valeurs fournies par les capteurs (4, 6) de la vitesse de rotation et par les capteurs (5, 7) de l'angle de rotation pour le moteur d'entraînement (1), et les valeurs fournies pour le tambour à câble (3) et qui, en cas d'un écart par rapport à des relations prescrites, envoie un signal de dérangement (9) pour un arrêt d'urgence,
    caractérisé par le fait que le circuit d'évaluation (8) compare en outre des valeurs d'angles de rotation, qui sont dérivées des valeurs de la vitesse de rotation des capteurs (4, 6) de la vitesse de rotation, aux valeurs d'angles de rotation fournies par les capteurs associés (5, 7) de la vitesse de rotation.
  2. Dispositif de sécurité suivant la revendication 1, caractérisé par le fait que les capteurs (4, 6) de la vitesse de rotation sont des capteurs incrémentaux et que les capteurs (5, 7) de la vitesse angulaire sont des codeurs angulaires.
  3. Dispositif de sécurité suivant la revendication 1 ou 2, caractérisé par le fait que, pour plusieurs moteurs d'entraînement (10, 11, 12, 13) électriques, qui entraînent respectivement deux par deux au moins un tambour à câble (16), par l'intermédiaire d'un engrenage planétaire (14), le circuit d'évaluation contrôle la relation entre la somme des vitesses de rotation et/ou des angles de rotation des moteurs d'entraînement (10, 11, 12, 13) et les vitesses de rotation et/ou angles de rotation du tambour à câble (16).
EP91115098A 1990-09-21 1991-09-06 Dispositif de sécurité pour grues Expired - Lifetime EP0476459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4029992 1990-09-21
DE4029992 1990-09-21

Publications (3)

Publication Number Publication Date
EP0476459A2 EP0476459A2 (fr) 1992-03-25
EP0476459A3 EP0476459A3 (en) 1992-11-04
EP0476459B1 true EP0476459B1 (fr) 1994-05-18

Family

ID=6414732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115098A Expired - Lifetime EP0476459B1 (fr) 1990-09-21 1991-09-06 Dispositif de sécurité pour grues

Country Status (2)

Country Link
EP (1) EP0476459B1 (fr)
DE (1) DE59101661D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100542941C (zh) * 2003-08-25 2009-09-23 德马格起重机及部件有限公司 用于监控链式滑车组的方法及链式滑车组

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905020A1 (de) * 1999-01-28 2000-08-10 Mannesmann Ag Verfahren zur ständigen Überwachung der ordnungsgemäßen Betriebsfunktion eines Kranes
DE10233870A1 (de) * 2002-07-25 2004-02-19 Siemens Ag Krananlage, insbesondere Containerkran
DK1597637T3 (da) * 2003-02-28 2008-10-27 Gottwald Port Tech Gmbh Fremgangsmåde og indretning til sikkerhedsafbrydelse af elektriske drev
US7063306B2 (en) * 2003-10-01 2006-06-20 Paccar Inc Electronic winch monitoring system
DE102015102140A1 (de) 2015-02-13 2016-08-18 Terex MHPS IP Management GmbH Anordnung aus einem elektrischen Antriebsmotor, einem Getriebe und einem Drehgeber, insbesondere für einen Seilzug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031363B (en) * 1978-10-17 1982-08-11 Northern Eng Ind Crane safety system
GB2144091B (en) * 1983-07-30 1986-04-30 Norcros Investments Ltd Crane safety device
DE3838058C3 (de) * 1988-11-07 1996-04-11 Mannesmann Ag Antriebsüberwachung einer Antriebskette

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100542941C (zh) * 2003-08-25 2009-09-23 德马格起重机及部件有限公司 用于监控链式滑车组的方法及链式滑车组

Also Published As

Publication number Publication date
EP0476459A3 (en) 1992-11-04
EP0476459A2 (fr) 1992-03-25
DE59101661D1 (de) 1994-06-23

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