WO2018202745A1 - Dispositif de détection pour détecter l'usure d'un patin de frein d'un frein électromagnétique et un ascenseur - Google Patents

Dispositif de détection pour détecter l'usure d'un patin de frein d'un frein électromagnétique et un ascenseur Download PDF

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Publication number
WO2018202745A1
WO2018202745A1 PCT/EP2018/061281 EP2018061281W WO2018202745A1 WO 2018202745 A1 WO2018202745 A1 WO 2018202745A1 EP 2018061281 W EP2018061281 W EP 2018061281W WO 2018202745 A1 WO2018202745 A1 WO 2018202745A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnetic
brake
block
detection device
unit
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/EP2018/061281
Other languages
English (en)
Inventor
Wen Liu
Xu MAO
Yali Su
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.)
ThyssenKrupp AG
TK Elevator GmbH
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Elevator AG
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 ThyssenKrupp AG, ThyssenKrupp Elevator AG filed Critical ThyssenKrupp AG
Publication of WO2018202745A1 publication Critical patent/WO2018202745A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0037—Performance analysers
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/028—Apparatus for indicating wear using electrical detection or indication means with non-electrical sensors or signal transmission, e.g. magnetic, optical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
    • B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices

Definitions

  • the present invention relates to a detection device for detecting brake pad wear of an electromagnetic brake. Moreover, the present invention also relates to an elevator comprising the same detection device.
  • Elevator brakes play an important role in the elevator security protection, of which the effective part is brake pads (brake blocks).Wear of brake pads in the long run will result in greater braking noise, insufficient braking force will lead to longer stopping distance, unreliable brake and so on.
  • the brake torque detection is generally used to indirectly reflect the state of the brake pad wear, for example, a patent entitled “an elevator brake torque detection method concerns detecting the braking force by automatically detecting a stopping distance of the car in the starting and braking state, but the braking distance is influenced by many factors, easy to false alarm, etc. in this technical solution. Additionally, a patent entitled “a method for implementing brake force detection of motor” relates to detecting the braking force by directly detecting the rotation of the motor in the braking state, the result is reliable, but it needs maintenance personnel to test on-site regularly, thus it has high cost but low automation degree.
  • the present invention proposes a low cost detection device for automatically detecting brake pad wear of an electromagnetic brake.
  • the present invention relates to a detection device for detecting brake pad wear of an electromagnetic brake according to claim I.
  • the brake comprising a brake wheel, a moving block, a static block, and a brake pad arranged between the moving block and the brake wheel, a gap existing between the moving block and the static block
  • the detection device comprises an electromagnetic displacement induction unit and an induction block; the induction block is arranged on one of the blocks; the electromagnetic displacement induction unit is arranged on the other one of the blocks, and the electromagnetic displacement induction unit and the induction block are arranged to face each other;
  • the electromagnetic displacement induction unit senses the gap change between the moving block and the static block, and generates an alarm signal when the gap change value is greater than a predetermined value.
  • the detection device further can comprise an alarm signal output unit, a timer unit is connected in series between the electromagnetic displacement induction unit and the alarm signal output unit; the timer unit receives alarm signals from the electromagnetic displacement induction unit continuously for a predetermined time period, then sends the alarm signals to the alarm signal output unit.
  • a timer any other kind of filter may be used, in particular a low pass filter.
  • the timer unit can comprise a reset switch which is electrically connected with a signal output terminal of a processor of the electromagnetic displacement induction unit, and when the processor has no signal output, the reset switch is used for resetting a timer of the timer unit.
  • a signal control switch can be connected in series between the electromagnetic displacement induction unit and the timer unit, the signal control switch is electrically connected with a brake signal or standby signal input terminal of the electromagnetic brake, and switches off when the electromagnetic brake works.
  • the electromagnetic displacement induction unit can output a linear, non-linear or step type signal.
  • the electromagnetic displacement induction unit can be arranged on the moving block via a first bracket; and the induction block can be arranged on the static block via a second bracket.
  • the electromagnetic displacement induction unit can comprise a hall induction unit.
  • the induction block can comprise an iron or a magnet.
  • the hall induction unit can comprise a hall displacement sensor and/or the alarm signal output unit comprises an alarm lamp or an alarm horn.
  • the present invention further relates to an elevator comprising the detection device for detecting brake pad wear of an electromagnetic brake as mentioned above.
  • the present invention adopts the above technical solutions, which generates the following beneficial effects:
  • the brake pad wear state is detected by using a hall displacement sensor, in order to replace the brake timely, and avoid the security incidents caused by lacking of braking force. Moreover, the brake is only detected when it's power off, which greatly improves the detection accuracy, and also prevents the elevator accidents from occurring due to signals detected during the elevator operation;
  • Confirming the signal availability by the timer can filter false alarm caused by random interference, such as field impact, vibration, temperature fluctuations, the brake remanence, and so on;
  • the bracket type installation does not need to change the internal structure of the brake, which is convenient and quick, easy to be popularized;
  • Fig. 1 is a structural schematic diagram of a detection device for detecting brake pad wear of an electromagnetic brake of the present invention
  • Fig. 2 is a structural block diagram of an electromagnetic displacement induction unit of the present invention
  • Fig. 3 is a working principle diagram of an electromagnetic displacement induction unit comprising hall elements of the present invention
  • Fig. 4 is a structural schematic diagram of the detection device for detecting brake pad wear of the present invention prior to brake pad wear;
  • Fig. 5 is a structural schematic diagram of the detection device for detecting brake pad wear of the present invention after brake pad wear.
  • a detection device for detecting brake pad wear of an electromagnetic brake of the present invention comprises: an electromagnetic displacement induction unit 1, a first bracket 2, an induction block 3, a second bracket 4, a signal control switch 5, a timer unit 6, an alarm signal output unit 7, a static block 8, a moving block 9, a brake pad 10 arranged between the moving block and a brake wheel 11.
  • the electromagnetic displacement induction unit 1 is installed on the moving block 9 of the brake via the first bracket 2
  • the induction block 3 is installed on the static block 8 of the brake via the second bracket 4
  • the electromagnetic displacement induction unit 1 comprises a hall induction unit and a processor.
  • the hall induction unit and the induction block 3 are arranged to face each other, thus it does not need to change the internal structure of the brake, and installation is convenient.
  • the first bracket 2 and the second bracket 4 is an L-shape metal bracket respectively, which structure is stable and light, reducing cost.
  • the alarm signal output unit 7 is electrically connected with a signal output terminal of the processor, the hall induction unit of the electromagnetic displacement induction unit 1 can sense the gap change between the moving block 9 and the static block 8.
  • the gap change value is less than the predetermined value set in the processor, i.e. the gap value does not change much or has no change, as shown in Fig. 4, which shows that the brake pad is not worn or wear is not serious
  • the alarm signal is not output (or OV low level is output);
  • the processor sends the alarm signal to the alarm signal output unit 7, such that the alarm signal output unit 7 outputs the alarm information.
  • the electromagnetic displacement induction unit 1 outputs signal inversion via the processor, which may send the alarm signal (for example, 24V piezoelectric signal) to the alarm signal output unit 7 directly or indirectly via the following timer unit 6.
  • the electromagnetic displacement induction unit 1 of the present invention can comprise a hall induction unit 13 which may output linear, non-linear or step type signals and a processor 14 which may comprise a signal processing unit and a storing unit.
  • the signal processing unit can be single chip, DSP or general purpose processor, and it can be integrated with the storing unit and also can be arranged separately.
  • the storing unit can be used to store related information, for example, the predetermined value used to be compared with the above gap change, and the storing unit can be: ROM, PROM, EPROM, EEPROM or flash memory, and so on.
  • the electromagnetic displacement induction unit 1 comprises a hall induction unit.
  • the induction block 3 comprises an iron or a magnet.
  • the induction block can be an iron also can be a magnet because the hall means as a preferred embodiment of the induction unit can be embedded or not embedded with a magnet.
  • the induction mean can be an iron, and when it is not embedded with a magnet, the induction mean is a magnet. Below the hall mean not embedded with a magnet is taken as an example, said induction mean is a magnet.
  • the processor 14 firstly self-learns according to relative location of the electromagnetic displacement induction unit 1 and the magnet, and then initializes inversion thresholds of output signal according the preset amount of wear.
  • the basic working principle of the hall displacement sensor is: when the hall induction unit (hall sensor) of the electromagnetic displacement induction unit 1 is disposed in the magnetic field B of Z+ direction, if current A passes in the Y direction, hall voltage u may be generated in the X direction, whose size is proportional to the magnetic field intensity B.
  • the magnetic field B is provided by a magnet, the displacement between the magnet and the hall mean would result in change of the magnetic field intensity B, which may be further represented by the hall voltage. Therefore, by use of such hall displacement sensor, it can accurately measure the displacement of an object, and it has low cost and mature technology.
  • a timer unit 6 can be connected in series between the electromagnetic displacement induction unit 1 and the alarm signal output unit 7. After the timer unit 6 continuously receives the alarm information from the processor for a certain period of time, then the alarm information is sent to the alarm signal output unit 7. That is, only after the wear signal output by the electromagnetic displacement induction unit 1 lasts for a certain period of time (the time period preset in the timer unit 6), then the confirmed wear alarm signal is output to the elevator control system. It can filter false alarm caused by random interference, such as field impact, vibration, temperature fluctuations, the brake remanence, and so on.
  • the predetermined time period can be 20 seconds.
  • the any other suitably configured low pass filter can be used as well.
  • the timer unit 6 further comprises a reset switch RST that is electrically connected with a signal output terminal of the processor, and the reset switch automatically reset the timer of the timer unit 6 when the processor has no signal output.
  • a signal control switch 5 is connected in series between the electromagnetic displacement induction unit 1 and the timer unit 6, the signal control switch is electrically connected with a brake signal or standby signal input terminal of the electromagnetic brake.
  • the signal control switch 5 switches off, and when the electromagnetic brake does not work, the signal control switch 5 switches on, to start detecting the wear situation of the brake pad. Only when the signal control switch 5 switches on, i.e. the brake is powered off, then it can be detected, to prevent the self magnetic field of the brake to interfere the hall sensor when the brake is powered on, simultaneously to avoid users to be trapped due to alarm of brake pad wear.
  • the alarm signal output unit 7 can comprise an alarm lamp or an alarm horn, which outputs the alarm information in the form of lighting or sound. Additionally, the output unit also can be connected with outputting devices such as a display or a printer or the like, so as to output the wear situation in the form of image or document.
  • the present invention also relates to an elevator (not shown), comprising the above said detection device for detecting brake pad wear of an electromagnetic brake. Since other structures of said elevator here are the same or similar as structures of the elevators in the prior art, they are not described in detail hereinafter. The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Arrangements (AREA)

Abstract

La présente invention concerne un dispositif de détection pour détecter l'usure d'un patin de frein d'un frein électromagnétique, le frein comprenant un élément de frein, en particulier une roue de frein (11), un bloc mobile (9), un bloc statique (8), et un patin de frein (10) disposé entre le bloc mobile et l'élément de frein, un espace existant entre le bloc mobile et le bloc statique, caractérisé en ce que le dispositif de détection comprend une unité d'induction de déplacement électromagnétique (1) et un bloc d'induction (3); le bloc d'induction (3) est disposé sur un premier des blocs (8, 9), en particulier sur le bloc statique (8) ou sur le bloc mobile (9); l'unité d'induction de déplacement électromagnétique (1) est disposée sur un second des blocs (9, 8), en particulier sur le bloc mobile (9) ou sur le bloc statique (8), et l'unité d'induction de déplacement électromagnétique (1) et le bloc d'induction (3) sont agencés pour se faire face l'un à l'autre; et l'unité d'induction de déplacement électromagnétique (1) configurée pour détecter le changement d'espace entre le bloc mobile (9) et le bloc statique (8), et générer un signal d'alarme lorsque la valeur de changement d'intervalle est supérieure à une valeur prédéterminée.
PCT/EP2018/061281 2017-05-04 2018-05-03 Dispositif de détection pour détecter l'usure d'un patin de frein d'un frein électromagnétique et un ascenseur Ceased WO2018202745A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710307178.4A CN108799373B (zh) 2017-05-04 2017-05-04 用于检测电磁制动器的制动片磨损的检测装置及电梯
CN201710307178.4 2017-05-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111606165A (zh) * 2019-02-26 2020-09-01 肯德隆（菲林根）有限公司 电磁制动器或离合器
US20220281717A1 (en) * 2021-03-08 2022-09-08 Otis Elevator Company Elevator brake wear detection method, detection device and elevator brake
EP4282802A1 (fr) * 2022-05-24 2023-11-29 OTIS Elevator Company Dispositif et procédé de vérification automatique pour dispositif de freinage et système d'ascenseur

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CN109029233B (zh) * 2018-08-31 2020-06-26 中国联合网络通信集团有限公司 刹车片厚度检测系统及车辆
CN109682519A (zh) * 2018-12-29 2019-04-26 四川陆通检测科技有限公司 侦测及稳定夹片位移法测试锚下有效预应力的系统及方法
EP3725723B1 (fr) * 2019-04-15 2024-05-29 Otis Elevator Company Système de surveillance de garniture de frein
CN112179275B (zh) * 2019-07-01 2022-06-03 欧姆龙(上海)有限公司 光栅尺传感器以及检测方法
CN112408175A (zh) * 2020-11-20 2021-02-26 日立电梯（广州）自动扶梯有限公司 磨损检测结构及自动扶梯或自动人行道
CN119618022B (zh) * 2024-12-09 2025-08-01 徐州鹏宇液压科技有限公司 一种液压阀块孔位检测装置

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EP1127025A2 (fr) * 1998-10-06 2001-08-29 Kone Corporation Procede relatif a la determination du fonctionnement et de l'etat du frein d'arret d'un ascenseur, et frein d'arret
US20100065379A1 (en) * 2007-06-18 2010-03-18 Karl Erny Device and method for controlling a brake device
EP2344781A1 (fr) * 2008-11-03 2011-07-20 Kone Corporation Appareil et procédé de vérification de l état d un frein
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Publication number Priority date Publication date Assignee Title
CN111606165A (zh) * 2019-02-26 2020-09-01 肯德隆（菲林根）有限公司 电磁制动器或离合器
CN111606165B (zh) * 2019-02-26 2022-07-08 肯德隆（菲林根）有限公司 电磁制动器或离合器
CN111606165B9 (zh) * 2019-02-26 2022-08-05 肯德隆（菲林根）有限公司 电磁制动器或离合器
US20220281717A1 (en) * 2021-03-08 2022-09-08 Otis Elevator Company Elevator brake wear detection method, detection device and elevator brake
EP4282802A1 (fr) * 2022-05-24 2023-11-29 OTIS Elevator Company Dispositif et procédé de vérification automatique pour dispositif de freinage et système d'ascenseur
US20230382686A1 (en) * 2022-05-24 2023-11-30 Otis Elevator Company Self-checking device and method for braking device and elevator system

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