EP1510498B1 - Procédé de surveillance d' un palan à chaine et palan à chaine - Google Patents

Procédé de surveillance d' un palan à chaine et palan à chaine Download PDF

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Publication number
EP1510498B1
EP1510498B1 EP04019121A EP04019121A EP1510498B1 EP 1510498 B1 EP1510498 B1 EP 1510498B1 EP 04019121 A EP04019121 A EP 04019121A EP 04019121 A EP04019121 A EP 04019121A EP 1510498 B1 EP1510498 B1 EP 1510498B1
Authority
EP
European Patent Office
Prior art keywords
drive motor
speed
gearbox
operating
chain hoist
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
EP04019121A
Other languages
German (de)
English (en)
Other versions
EP1510498A1 (fr
Inventor
Holger Freitag
Oliver Moll
Erik Appel
Ralf Eising
Udo Gersemsky
Burkhard Hasenack
Anton Münzebrock
Guiliano Persico
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.)
Demag Cranes and Components GmbH
Original Assignee
Demag Cranes and Components 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 Demag Cranes and Components GmbH filed Critical Demag Cranes and Components GmbH
Publication of EP1510498A1 publication Critical patent/EP1510498A1/fr
Application granted granted Critical
Publication of EP1510498B1 publication Critical patent/EP1510498B1/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
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/20—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
    • B66D3/22—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing with variable-speed gearings between driving motor and drum or barrel
    • 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
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/48—Control devices automatic
    • B66D1/485—Control devices automatic electrical
    • 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 method for monitoring a chain hoist with an electric drive motor, which is connected on the output side via a slip clutch to a transmission.
  • the invention also relates to a chain hoist with an electric drive motor, which is connected on the output side via a slip clutch to a transmission.
  • chain hoists are generally known, the brake is arranged on the output shaft of the drive motor and thus before the slip clutch.
  • an overload of the chain hoist, a faulty limit switch or a release of the brake not performed as a malfunction not only lead to a desired slipping of the slip clutch but also to their thermal overload. Depending on the design of the chain hoist, this may be too cause severe wear or destruction of the slip clutch or even crash the load.
  • the drive chain here has a form-locking power transmission between an electric motor and a trained as a cable drum of a cable load application point.
  • the cable drum is associated with an additional brake, which is actuated when a speed deviation between a first speed sensor associated with the electric motor and a second speed sensor associated with the cable drum is determined.
  • the additional brake can thus prevent a load crash.
  • This monitoring device does not provide to switch off the electric motor in case of interrupted force closure, as this just runs unloaded with interrupted power flow empty. Also here is the monitoring of the evaluation of two speed signals from two speed sensors. A deviation of the rotational speed of the electric motor from its operating data in the sense of an over or underspeed is not recognized by this monitoring device.
  • the invention has for its object to provide a method for monitoring a chain hoist and a structurally simple chain hoist with a slip clutch that allow safe operation of the chain hoist.
  • the object is achieved by a method having the features of claim 1 and by a chain hoist having the features of claim 7.
  • the dependent claims 2 to 6 contain an advantageous embodiment of the method and the dependent claims 8 to 10 contain advantageous embodiments of the chain hoist.
  • a safe operation of the chain hoist is achieved in a method for monitoring a chain hoist with an electric drive motor, the output side via a slip clutch with a transmission achieved by a sensor, the speed of the transmission is determined, the determined speed of the transmission in a control device is compared with the determined from operating data of the drive motor operating speed of the drive motor and upon detection of a deviation of the speed of the transmission is switched off from the operating speed, taking into account tolerances and, where appropriate, gear ratio of the transmission of the drive motor.
  • a thermal overload of the slip clutch is particularly easy to avoid.
  • a minimization of the wear of the slip clutch is to be achieved.
  • an overload of the chain hoist can also be detected very quickly with a response time of less than one second via the sensor according to the invention.
  • the invention requires only the use of a single speed sensor, since its measured value for the monitoring process is compared with a previously determined stored in the control device operating speed, which is characteristic of the current operating state.
  • the deviations determined via the monitoring can be over or under speeds with respect to the stored operating speed, which usually result from malfunctions of the drive motor, the slip clutch, the transmission or the brake.
  • the comparison of the speed of the transmission with the determined from operating data of the drive motor operating speed is particularly simple when the speed of the adjoining the slip clutch transmission input shaft is determined via the sensor. Since the sensor is arranged on the transmission input shaft, in addition to monitoring the slip clutch, this sensor can also detect malfunctions of a brake arranged on the transmission input shaft and thus overheating of the brake can be avoided.
  • control device changes during operation of the chain hoist, in particular in a change between individual operating conditions, which changes from one to another operating speed.
  • control device is adjustable or programmable with regard to the time periods required for a change between the respective operating states and the permissible operating speed to be reached within the assigned time periods. If, for example, a usual period for a run-up of the chain hoist from the slow lifting speed to the fast lifting speed is exceeded, the drive motor is switched off and, if necessary, the brake is activated. Even with these periods tolerances can be taken into account so as not to disturb the operation of the chain hoist.
  • the comparison required for the monitoring is additionally simplified if the operating speeds stored or stored in the control device are in the form of operating speed ranges and thus already additionally contain the information about the permissible tolerance range with respect to the operating speed for the respective operating state. This also applies to the periods.
  • a safe operation of the chain hoist is achieved according to the invention characterized in that a sensor is provided for detecting the rotational speed of the transmission, which is connected to a control device, the control device is connected to the drive motor and the control device compares the rotational speeds determined from the measured values from the sensor and the measured values or operating data of the drive motor, and a determination of a deviation of the rotational speed of the transmission from the engine rotational speed, taking into account tolerances and optionally transmission ratio of the transmission a shutdown of the drive motor conditionally.
  • a simplification of the comparison of the rotational speed of the transmission with the engine rotational speed determined from operating data or measured values of the drive motor is achieved in that the sensor for determining the rotational speed of the transmission input shaft is arranged on the transmission input shaft adjoining the slip clutch.
  • the senor is designed as a rotationally fixed on the transmission input shaft formed fan disc whose speed is determined by a light barrier.
  • FIG. 1 shows a schematic representation of the essential drive components of a chain hoist 1.
  • the chain hoist 1 has an electric drive motor 2 with a protruding on the output side of the drive motor 2 motor shaft 3.
  • the motor shaft 3 is arranged coaxially with a transmission input shaft 4 and rotatably connected thereto.
  • the transmission input shaft 4 is mounted in the region of its ends via a first bearing 5 and a second bearing 6, which are preferably designed as rolling bearings.
  • the transmission input shaft 4 is part of a transmission 7, which is formed in the present embodiment in one stage, but may well be multi-stage.
  • the transmission 7 consists essentially of the transmission input shaft 4 between the bearing 5 and 6, a first gear 8 is arranged, which meshes with a second gear 9.
  • This second gear 9 of the single gear stage of the transmission 7 is rotatably mounted on a transmission output shaft 10 which is mounted on both sides of the second gear 9 with a third bearing 11 and a fourth bearing 12, which are preferably designed as rolling bearings.
  • the transmission input shaft 4 and the transmission output shaft 10 are here at a distance from each other and arranged parallel to each other.
  • a rotationally fixed Sprocket 13 is arranged at one end of the transmission output shaft 10 arranged.
  • This sprocket 13 is used in the usual way for the positive drive of the chain, not shown, of the chain 1, which enters after a successful lifting operation of the chain 1 of the sprocket 13 in a chain memory, not shown.
  • a slip clutch 14 is arranged as overload protection.
  • the slip clutch 14 consists essentially of a clutch disc 15 with an annular clutch lining 16, a pressure plate 17 and a spring element, not shown, for generating a bias between thrust washer 17 and clutch disc 15.
  • the pressure plate 17 and clutch disc 15 are each rotatably on the in the slip clutch 14 interrupted transmission input shaft 4 is arranged.
  • the spring element is provided, which preferably consists of abutting and arranged on the transmission input shaft spring washers.
  • the package of the spring elements is supported on one side on the transmission input shaft 4 and on the other side on the first bearing. 5
  • a sensor 18 for determining the rotational speed of the transmission input shaft 4 is arranged.
  • the sensor 18 is preferably formed as a fan disk, not shown, which is arranged with the transmission input shaft 4 circumferentially at the end.
  • a light barrier is arranged, via whose determined frequency of the light barrier interruption in a connected to the sensor 18 control device 19, the rotational speed of the transmission input shaft 4 is determined.
  • a preferably electromagnetically actuated brake 20 is disposed on the transmission input shaft 4, which can be controlled via the control device 19.
  • the conventionally disfiguring regions of operating speeds of the drive motor 2 are stored or stored in this control device 19 for a wide variety of operating states.
  • operating states for example, standstill, high-speed lowering, low-speed lowering, high-speed lifting, low-speed lifting, switching between high and low speeds in hoisting and lowering, and raising or lowering from high or low speed to standstill understood to achieve the high or low speed.
  • the currently applicable operating state results from the position of the operator switch for the drive motor 2.
  • the self-adjusting ranges of operating speeds of the drive motor 2 are empirically determined for the motor types and network frequencies used in the usual way. A calculation is also possible.
  • the control device 19 is adjustable or programmable with regard to the time periods required for a change between the operating states and the permissible operating speed ranges to be reached within the assigned time periods.
  • the control device 19 can be set optimized for the various operating conditions. For example, a period of several hundred milliseconds (for example, 700 ms) may be provided for the slow lifting movement before the brake 20 and drive motor 2 are shut down to allow checking and adjustment of the slip clutch 14.
  • the periods and operating speed ranges are chosen so that neither drive motor 2, brake 20 or slip clutch 14 are overloaded nor that an impermissible load movement can take place.
  • the monitoring of the chain hoist 1 can also be dependent on the direction of rotation, d. H. in Hubrackinglander lowering, done.
  • the control device 19 receives the control signal for the desired direction of movement of the load (lifting or lowering) via the unillustrated operating device for the chain hoist 1, the correspondence between the desired direction of movement and the actual direction of movement can be monitored.
  • the control device 19 by comparing the speed of the transmission input shaft 4 with the stored in the control device 19 for the drive motor 2 operating speed range for each current operating state and now available Deviation detected and the control device 19 will immediately shut off the drive motor 2 and simultaneously control the brake 20 for the braking operation.
  • a crash of the load can be successfully avoided.
  • the brake 20 is arranged on the end of the transmission input shaft 4 facing away from the drive motor 2 and thus behind the slip clutch 14 when viewed from the drive motor 2.
  • control device 19 is connected to the drive motor 2 and the brake 20 accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Transmission Device (AREA)
  • Transmission Devices (AREA)
  • Braking Arrangements (AREA)
  • Control And Safety Of Cranes (AREA)

Claims (10)

  1. Procédé de surveillance d'un palan à chaîne comportant un moteur d'entraînement électrique (2) qui est raccordé en sortie à un réducteur (7) par le biais d'un embrayage à friction (14),
    caractérisé en ce que la vitesse du réducteur (7) est déterminée par un capteur (18), la vitesse déterminée du réducteur (7) est comparée, dans un dispositif de commande (19), à la vitesse de régime du moteur d'entraînement (2), déterminée à partir de données de fonctionnement du moteur d'entraînement (2) et, en cas d'écart entre la vitesse du réducteur (7) et la vitesse de régime, le moteur d'entraînement (2) est connecté en tenant compte des tolérances et éventuellement du rapport de démultiplication du réducteur (7).
  2. Procédé selon la revendication 1, caractérisé en ce qu'un frein (20), relié au réducteur (7), est actionné en mode de freinage en même temps que l'on arrête le moteur d'entraînement (2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la vitesse de l'arbre d'entrée (4) du réducteur, lequel arbre est raccordé à l'embrayage à friction (14), est déterminée par le capteur (18).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la vitesse de régime du moteur d'entraînement (2), laquelle est avantageusement déterminée empiriquement à partir de données de fonctionnement du moteur d'entraînement (2), est stockée respectivement mémorisée dans le dispositif de commande (19) pour différents états de fonctionnement du palan à chaîne (1).
  5. Procédé selon la revendication 4, caractérisé en ce que le dispositif de commande (19) peut être réglé respectivement programmé pour définir les laps de temps nécessaires au passage entre les états de fonctionnement respectifs, ainsi que la vitesse de régime qu'il est permis d'atteindre dans les laps de temps associés.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que les vitesses de régime respectives sont stockées respectivement mémorisées dans le dispositif de commande (19) sous la forme de plages de vitesse de régime.
  7. Palan à chaîne comportant un moteur d'entraînement électrique (2), notamment en vue de mettre en oeuvre le procédé selon les revendications 1 à 6, lequel palan à chaîne est relié en sortie à un réducteur (7) par le biais d'un embrayage à friction (14),
    caractérisé en ce qu'un capteur (18) est destiné à détecter la vitesse du réducteur (16) qui est relié à un dispositif de commande (19), en ce que le dispositif de commande (19) est relié au moteur d'entraînement (2) et en ce que les vitesses, déterminées à partir des valeurs de mesure provenant du capteur (18) et à partir des données de fonctionnement du moteur d'entraînement (2), peuvent être comparées par le dispositif de commande (19) et une détermination d'un écart entre la vitesse du réducteur (16) et la vitesse du moteur conditionne un arrêt du moteur d'entraînement (2) en tenant compte de tolérances et éventuellement du rapport de démultiplication du réducteur (7).
  8. Palan à chaîne selon la revendication 7, caractérisé en ce qu'un frein (20), relié en sortie au réducteur (7), est actionné en mode de freinage en même temps que l'on arrête le moteur d'entraînement (2).
  9. Palan à chaîne selon la revendication 7 ou 8, caractérisé en ce que le capteur (18), destiné à déterminer la vitesse de l'arbre d'entrée (4) du réducteur, est placé au niveau de l'arbre d'entrée (4) du réducteur qui est raccordé à l'embrayage à friction (14).
  10. Palan à chaîne selon l'une des revendications 7 à 9, caractérisé en ce que le capteur (18) est conformé en rondelle en éventail conformée fixe en rotation sur l'arbre d'entrée (4) du réducteur dont la vitesse est déterminée par une barrière lumineuse.
EP04019121A 2003-08-25 2004-08-12 Procédé de surveillance d' un palan à chaine et palan à chaine Expired - Lifetime EP1510498B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10339440A DE10339440A1 (de) 2003-08-25 2003-08-25 Verfahren zur Überwachung eines Kettenzuges und Kettenzug
DE10339440 2003-08-25

Publications (2)

Publication Number Publication Date
EP1510498A1 EP1510498A1 (fr) 2005-03-02
EP1510498B1 true EP1510498B1 (fr) 2007-03-21

Family

ID=34089214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04019121A Expired - Lifetime EP1510498B1 (fr) 2003-08-25 2004-08-12 Procédé de surveillance d' un palan à chaine et palan à chaine

Country Status (4)

Country Link
US (1) US7422542B2 (fr)
EP (1) EP1510498B1 (fr)
CN (1) CN100542941C (fr)
DE (2) DE10339440A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022122034A1 (de) 2022-08-31 2024-02-29 Konecranes Global Corporation Verfahren zur Überwachung eines Kettenzugs

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DE102007019959B3 (de) 2007-04-27 2008-07-03 Demag Cranes & Components Gmbh Steuerungsanordnung zum parallelen Betreiben von mindestens zwei Kettenzügen
CN102674184B (zh) * 2007-06-11 2015-07-08 索尤若驱动有限及两合公司 用于安全运行设备的配置结构、模块及方法
US9802787B2 (en) * 2013-09-20 2017-10-31 Reel Power Licensing Corp. Method of providing a clutch for a spool
FR3020804B1 (fr) * 2014-05-06 2019-06-28 Reel Treuil modulaire embarque
CN104444901B (zh) * 2014-12-10 2017-03-15 中曼石油钻井技术有限公司 一种石油钻机双档绞车电子差速控制系统及控制方法
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
CN107395557B (zh) * 2017-03-28 2020-05-15 创新先进技术有限公司 一种业务请求的处理方法及装置
US20190287107A1 (en) * 2018-03-15 2019-09-19 International Business Machines Corporation Resource equity for blockchain
CN111056471B (zh) * 2020-03-03 2024-08-16 宝鸡巨菱钻采设备有限责任公司 一种基于交流变频电动绞车的石油钻机用提升装置
CA3153573A1 (fr) * 2021-04-01 2022-10-01 Breeze-Eastern Llc Systeme de levage et procede de mise en oeuvre de detection de glissement

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DE10244865B4 (de) * 2002-09-23 2004-09-30 Demag Cranes & Components Gmbh Kettenzug
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022122034A1 (de) 2022-08-31 2024-02-29 Konecranes Global Corporation Verfahren zur Überwachung eines Kettenzugs
WO2024047049A1 (fr) 2022-08-31 2024-03-07 Konecranes Global Corporation Procédé de surveillance d'un palan à chaîne
US12522481B2 (en) 2022-08-31 2026-01-13 Konecranes Global Corporation Method for monitoring a chain hoist

Also Published As

Publication number Publication date
EP1510498A1 (fr) 2005-03-02
US20050065692A1 (en) 2005-03-24
US7422542B2 (en) 2008-09-09
DE502004003259D1 (de) 2007-05-03
CN100542941C (zh) 2009-09-23
DE10339440A1 (de) 2005-04-07
CN1590274A (zh) 2005-03-09

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