EP1023236B1 - Systeme d'ascenseur a traction dans lequel un cable plat et souple ainsi qu'une machinerie a aimants permanents sont utilises - Google Patents

Systeme d'ascenseur a traction dans lequel un cable plat et souple ainsi qu'une machinerie a aimants permanents sont utilises Download PDF

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Publication number
EP1023236B1
EP1023236B1 EP99936066A EP99936066A EP1023236B1 EP 1023236 B1 EP1023236 B1 EP 1023236B1 EP 99936066 A EP99936066 A EP 99936066A EP 99936066 A EP99936066 A EP 99936066A EP 1023236 B1 EP1023236 B1 EP 1023236B1
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EP
European Patent Office
Prior art keywords
elevator system
rope
rotor
machine
car
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
EP99936066A
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German (de)
English (en)
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EP1023236B2 (fr
EP1023236A1 (fr
Inventor
Leandre Adifon
Pedro. S. Baranda
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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Publication date
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Priority claimed from US09/031,108 external-priority patent/US6401871B2/en
Priority claimed from US09/169,415 external-priority patent/US6397974B1/en
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Priority to EP03024661.5A priority Critical patent/EP1391413B2/fr
Publication of EP1023236A1 publication Critical patent/EP1023236A1/fr
Application granted granted Critical
Publication of EP1023236B1 publication Critical patent/EP1023236B1/fr
Publication of EP1023236B2 publication Critical patent/EP1023236B2/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
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
    • B66B11/0438—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with a gearless driving, e.g. integrated sheave, drum or winch in the stator or rotor of the cage motor

Definitions

  • the present invention relates to elevator systems, and more particularly to elevator systems that use machines with rotors having permanent magnets.
  • a typical traction elevator system includes a car and a counterweight disposed in a hoistway, a plurality of ropes that interconnect the car and counterweight, and a machine having a traction sheave engaged with the ropes.
  • the ropes, and thereby the car and counterweight, are driven by rotation of the traction sheave.
  • the machine, and its associated electronic equipment, along with peripheral elevator components, such as a governor, are housed in a machineroom located above the hoistway.
  • a recent trend in the elevator industry is to eliminate the machineroom and locate the various elevator equipment and components in the hoistway.
  • An example is JP 4-50297, which discloses the use of a machine located between the car travel space and a wall of the hoistway.
  • Another example is US Patent 5, 429,211, which discloses the use of a machine located in the same position but having a motor with a disc-type rotor. This configuration makes use of the flatness of such a machine to minimize the space needed for the machine in the hoistway.
  • This machine disclosed also makes use of permanent magnets in the rotor in order to improve the efficiency of the machine.
  • WO-A-9943602 which forms prior art under Art. 54(3) EPC, discloses a belt climbing elevator.
  • an elevator system as claimed in claim 1.
  • the invention provides an elevator system as claimed in claim 8.
  • an elevator system in accordance with one aspect of the invention includes a machine having a rotor including permanent magnets and a flat rope engaged with the machine.
  • Flat rope as used herein, is defined to include ropes having an aspect ratio, defined as the ratio of width w relative to thickness t, greater than one.
  • a more detailed description of an example of such ropes is included in commonly owned co-pending US Patent Application Serial Number 09/031,108, entitled “Tension Member for an Elevator", filed February 2, 1998, issued as US 6,401,871).
  • An advantage of the present invention is the size of the machine required to meet duty load and speed requirements.
  • the combination of the improved efficiency of the machine and the torque reduction provided by the flat rope result in a very compact machine that can be fit within the space constraints of a hoistway without adversely affecting the performance of the elevator system. This permits the machine to be located in positions that were previously impractical.
  • the flat rope results in an engagement surface, defined by the width dimension, that is optimized to distribute the rope pressure. Therefore, the maximum pressure is minimized within the rope.
  • the thickness of the rope may be reduced while maintaining a constant cross-sectional area of the rope. Minimizing the thickness of the rope results in a smaller diameter traction sheave, which in turn reduces the torque on the machine decreases the size of the motor and may eliminate the need for gearing.
  • the smaller diameter of the sheave results in an increased rotational speed of the motor, which further increases the efficiency of the machine.
  • the permanent magnet machine is combined with a flat rope that includes a plurality of load-carrying members and a sheath that surrounds the load-carrying members and is formed from polyurethane.
  • the load-carrying members are formed from an aramid material that produces a high strength, lightweight rope with enhanced flexibility, as compared to conventional round steel ropes.
  • the load-carrying members are steel cords formed from very thin wires, with the wires having diameter of .25 mm or less. The use of a sheath formed from polyurethane permits the outer surface of the rope to be optimized for traction.
  • An advantage of this particular embodiment is the minimal risk of heat damage to the sheath and the load-carrying members of the rope due to use of a machine having a rotor with permanent magnets.
  • a machine having a rotor with permanent magnets much of the heat losses are in the rotor. This heat loss is conducted directly to the ropes through the sheave. For ropes formed from materials other than steel, which are more temperature sensitive, exposure to such a heat source may lead to degradation of the rope.
  • the principle source of heat loss is through the stator and not through the rotor.
  • the ropes are not exposed to the primary source of heat and the risk of heat related degradation of the materials of the rope is minimized.
  • the increased efficiency of the permanent magnet machine reduces the total heat generated and therefore further reduces the heating of the ropes.
  • the elevator system 10 includes a car 12, a pair of car guide rails 14, a counterweight 16, a pair of counterweight guide rails 18, a plurality of ropes 20 interconnecting the car 12 and counterweight, and a traction machine 22 engaged with the ropes 20.
  • the car 12 and counterweight 16 are interconnected to move concurrently and in opposite directions within a hoistway 23.
  • the car 12 includes a frame 24 and a pair of diverter sheaves 26 (only one of which is shown in Figure 1) disposed on opposite sides of the underside of the car frame 24.
  • the diverter sheaves 26 define an engagement means between the car 12 and ropes 20 and permit the ropes 20 to pass underneath the car 12 such that the car 12 is underslung.
  • the counterweight 16 includes a diverter sheave 28 disposed on the top of the counterweight 16. This diverter sheave 28 defines an engagement means between the counterweight 16 and ropes 20. As a result of the roping arrangement shown in Figure 1, both the car 12 and counterweight 16 are roped in a 2:1 arrangement relative to the machine 22.
  • the machine 22 is located between the travel path of the car 12 and a wall 30 of the hoistway 23.
  • the machine 22 is illustrated in more detail in Figure 3.
  • the machine 22 includes a motor 32 having a shaft 34 and a traction sheave 36.
  • the motor 32 includes a frame 38, bearings 40, a stator 42 and a rotor 44.
  • the traction sheave 36 is disposed on the end of the shaft 34 and defines an engagement surface 46 for the ropes 20.
  • the rotor 44 is disposed in a fixed relationship to the shaft 34 and includes a plurality of permanent magnets 48 disposed radially inward of the stator 42 such that a radial air gap 50 is defined between the rotor 44 and stator 42.
  • the use of permanent magnets 48 increases the efficiency and minimizes the size of the motor 32.
  • the ropes 20 interconnecting the car 12 and counterweight 16 are flexible flat ropes. As shown in Figure 3, there are three separate flat ropes 20 engaged with the machine 22. Each flat rope 20 includes a plurality of load-carrying members 52 encompassed by a sheath 54. The plurality of load-carrying members 52 support the tension loads in the ropes 20. The sheath 54 provides a retention layer for the load-carrying members 52 while also defining an engagement surface 56 for the flat rope 20. Traction between the flat rope 20 and the machine 22 is the result of the interaction between the engagement surface 56 of the ropes 20 and the complementary engagement surface 46 of the machine 22.
  • a suggested material for the load-carrying members is an aramid material, such as that sold by DuPont under the name of KEVLAR®. Such materials provide the advantages of having high tensile strength and being lightweight relative to conventional materials, such as steel.
  • the load-carrying member may be formed from steel cord. In order to provide sufficient flexibility in the rope, it is suggested to form the cord from steel wires or fibers having diameters of .025 mm or less.
  • a suggested material for the sheath is polyurethane.
  • Polyurethane provides the durability required while also enhancing the traction between the flat rope and the machine.
  • this material is suggested, other materials may also be used.
  • a sheath formed from neoprene or rubber may be used.
  • a rotor 44 having permanent magnets 48 also reduces the amount of heat loss through the rotor 44 as compared to conventional induction motors.
  • the rotor 44, traction sheave 36 and ropes 20 are in direct contact. This direct contact results in heat generated in the rotor 44 being conducted to the ropes 20.
  • the rotor accounts for approximately one-third of the heat loss.
  • the heat loss through the rotor is minimal and the primary source of heat loss in such motors is through the stator.
  • the elevator system 10 illustrated in Figure 1 includes an underslung car 12.
  • Figure 2 illustrates another embodiment.
  • a car 57 includes a pair of diverter sheaves 58 located on the top of the car 57 in a manner known as overslung.
  • overslung roping arrangements are less desirable in some applications due to the need to provide additional overhead space for the elevator system. This is especially significant if the machine is located in the hoistway.
  • the effects of an overslung car 57 are minimized as a result of the small machine and small sheaves that may be used with the present invention. Therefore, an overslung car 57 using Applicants' invention requires less overhead space and is more practical.
  • the car may be directly roped to the machine such that no sheaves are required on the car.
  • the machine may be located above the car travel path. Although in this particular embodiment an allowance will have to be made for the space required in the overhead for the machine, the combination of a permanent magnet machine and flexible flat ropes will minimize this space allowance.
  • the elevator system 70 includes a car 72, a counterweight 74, a pair of guide rails 76 for the car 72 and counterweight 74, a machine 78 disposed between the car 72 and a wall 80 of the hoistway, and a plurality of flat ropes 82 interconnecting the car 72 and counterweight 74.
  • the machine 78 and ropes 82 are illustrated in more detail in Figure 5.
  • the machine 78 includes a motor 84 and a traction sheave 86.
  • the motor 84 includes a frame 88, a stator 90 and a rotor 92.
  • the rotor 92 is a disc-type rotor 92 that produces a relatively flat machine 78.
  • a plurality of permanent magnets 94 are circumferentially spaced about the axis 96 of the machine 78 and axially spaced from the stator 90 such that an axial air gap 98 between the rotor 92 and stator 90 is defined.
  • the traction sheave 86 is integral to the rotor 92 and includes an engagement surface 100 for the plurality of ropes 82.
  • the plurality of ropes 82 are similar to those described with respect to the embodiment of Figures 1-3.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Abstract

Un système d'ascenseur à traction comprend une machinerie dotée d'un rotor à aimants permanents et un câble plat en contact avec la machinerie. Le câble plat comprend un ou plusieurs éléments porteurs maintenus dans une gaine commune en matériau non métallique.

Claims (18)

  1. Système d'ascenseur (10) ayant une cabine (12, 72) disposée à l'intérieùr d'une cage d'ascenseur (23), le système d'ascenseur comprenant :
    un câble (20, 82) en prise avec la cabine (12, 72), le câble ayant une largeur w, une épaisseur t mesurée dans le sens de déformation, et un rapport d'aspect défini comme le rapport de la largeur w par rapport à l'épaisseur t, supérieur à un ; et
    une machinerie (22, 78) en prise avec le câble (20, 82) pour entraíner le câble via une traction entre le câble et la machinerie, et par conséquent entraíner la cabine (12, 72) à travers la cage d'ascenseur (23), dans lequel la machinerie (22, 78) comprend un rotor (44, 92) en partie constitué d'aimants permanents (48, 94).
  2. Système d'ascenseur (10) selon la revendication 1, dans lequel le rotor (44) a une forme cylindrique.
  3. Système d'ascenseur (10) selon la revendication 1 ou 2, dans lequel la machinerie (22) comprend un moteur comprenant le rotor (44) et un stator (42), et comprenant en outre un espace d'air (50) entre le rotor et le stator, et dans lequel le rotor est espacé de manière radiale par rapport au stator.
  4. Système d'ascenseur (10) selon la revendication 3, dans lequel le rotor (44) est espacé de manière radiale vers l'intérieur du stator.
  5. Système d'ascenseur (10) selon la revendication 1, dans lequel le rotor (92) est plat.
  6. Système d'ascenseur (10) selon la revendication 1 ou 5, dans lequel la machinerie (78) comprend un moteur comprenant le rotor (92) et un stator (90), et comprenant en outre un espace d'air (98) entre le rotor et le stator, et dans lequel le rotor est espacé de manière axiale par rapport au stator.
  7. Système d'ascenseur (10) selon l'une quelconque des revendications précédentes, dans lequel la machinerie (22, 78) comprend en outre une poulie de traction (36, 86), et dans lequel le câble (20, 82) comprend en outre une pluralité d'éléments individuels porteurs de charge (52) insérés dans une gaine (54), dans lequel la gaine définit la surface d'engagement (56) pour engager la poulie de traction.
  8. Système d'ascenseur (10) ayant une cabine (12, 72) disposée à l'intérieur d'une cage d'ascenseur (23), le système d'ascenseur comprenant :
    un câble (20, 82) en prise avec la cabine, le câble comprenant un élément porteur de charge (52) et une gaine (54), dans lequel la gaine est faite d'un matériau non métallique ; et
    une machinerie (78, 22) comprenant une poulie de traction (36, 86) et un rotor (44, 92), la poulie de traction (36, 86) étant directement connectée au rotor (44, 92) pour une rotation concourante et engagée avec le câble (20, 82) pour entraíner le câble via une traction entre le câble et la poulie de traction, et par conséquent entraíner la cabine (12) à travers la cage d'ascenseur (23), dans laquelle le rotor (44, 92) est en partie constitué d'aimants permanents (48, 94), dans laquelle le câble (20, 82) a une largeur w, une épaisseur t mesurée dans le sens de déformation, et un rapport d'aspect défini comme le rapport de la largeur w à l'épaisseur t, supérieur à un.
  9. Système d'ascenseur (10) selon l'une quelconque des revendications 1 à 7, dans lequel le câble comprend une gaine (54) faite d'un matériau non métallique.
  10. Système d'ascenseur (10) selon la revendication 8 ou 9, dans lequel la gaine (54) est faite d'un matériau à base de polyuréthane.
  11. Système d'ascenseur selon l'une quelconque des revendications précédentes, dans lequel le câble comprend un ou plusieurs éléments porteurs de charge (52), et dans lequel les éléments porteurs de charge sont faits d'un matériau non métallique.
  12. Système d'ascenseur selon la revendication 11, dans lequel les éléments porteurs de charge (52) sont faits d'un matériau à base d'aramide.
  13. Système d'ascenseur selon l'une quelconque des revendications 1 à 10, dans lequel le câble (20, 82) comprend un ou plusieurs éléments porteurs de charge, et dans lequel les éléments porteurs de charge (52) sont faits d'acier.
  14. Système d'ascenseur selon la revendication 13, dans lequel les éléments porteurs de charge (52) sont faits de fils d'acier ayant un diamètre égal ou inférieur à 0,25 mm.
  15. Système d'ascenseur (10) selon l'une quelconque des revendications précédentes, dans lequel la machinerie (22, 78) est sans engrenage.
  16. Système d'ascenseur (10) selon l'une quelconque des revendications précédentes, dans lequel la machinerie (22) est disposée entre l'espace de course de la cabine (12) et une paroi de la cage d'ascenseur (30).
  17. Système d'ascenseur (10) selon l'une quelconque des revendications précédentes, dans lequel le câble (20, 82) est engagé avec une paire de poulies (26) disposées sur la cabine (12) de sorte que le câble (20, 82) passe sous la cabine.
  18. Système d'ascenseur (10) selon l'une quelconque des revendications 1 à 16, dans lequel le câble (20, 82) est engagé avec une poulie (58) disposée au-dessus de la cabine.
EP99936066A 1998-02-26 1999-02-19 Systeme d'ascenseur a traction dans lequel un cable plat et souple ainsi qu'une machinerie a aimants permanents sont utilises Expired - Lifetime EP1023236B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03024661.5A EP1391413B2 (fr) 1998-02-26 1999-02-19 Système d'ascenseur à traction dans lequel un cable plat et souple est utilisé

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US09/031,108 US6401871B2 (en) 1998-02-26 1998-02-26 Tension member for an elevator
US31108 1998-02-26
US09/169,415 US6397974B1 (en) 1998-10-09 1998-10-09 Traction elevator system using flexible, flat rope and a permanent magnet machine
US169415 1998-10-09
US218990 1998-12-22
US09/218,990 US6739433B1 (en) 1998-02-26 1998-12-22 Tension member for an elevator
PCT/US1999/003643 WO1999043590A1 (fr) 1998-02-26 1999-02-19 Systeme d'ascenseur a traction dans lequel un cable plat et souple ainsi qu'une machinerie a aimants permanents sont utilises

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP03024661.5A Division EP1391413B2 (fr) 1998-02-26 1999-02-19 Système d'ascenseur à traction dans lequel un cable plat et souple est utilisé

Publications (3)

Publication Number Publication Date
EP1023236A1 EP1023236A1 (fr) 2000-08-02
EP1023236B1 true EP1023236B1 (fr) 2004-02-04
EP1023236B2 EP1023236B2 (fr) 2009-02-04

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EP99936066A Expired - Lifetime EP1023236B2 (fr) 1998-02-26 1999-02-19 Systeme d'ascenseur a traction dans lequel un cable plat et souple ainsi qu'une machinerie a aimants permanents sont utilises

Country Status (5)

Country Link
EP (1) EP1023236B2 (fr)
DE (1) DE69914577C5 (fr)
ES (1) ES2211130T5 (fr)
PT (1) PT1023236E (fr)
WO (1) WO1999043590A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2489622A1 (fr) 2011-02-16 2012-08-22 Scanclimber Oy Monte-charge de bâtiment

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JP2001524060A (ja) * 1996-12-30 2001-11-27 コネ コーポレイション エレベータロープ装置
DE19948946A1 (de) * 1999-10-11 2001-04-19 Wittur Ag Aufzug mit einem an einem Tragmittel gehaltenen Fahrkorb
DK1326797T4 (da) † 2000-09-27 2010-04-06 Inventio Ag Elevator med i elevatorskakten foroven på siden anbragt drivenhed
DE10154171A1 (de) * 2001-11-05 2003-05-28 Otis Elevator Co Modernisierung von Hydraulikaufzügen
US8444515B2 (en) 2001-11-13 2013-05-21 Otis Elevator Company Elevator belt assembly with noise and vibration reducing grooveless jacket arrangement
ES2298937T3 (es) * 2001-11-23 2008-05-16 Inventio Ag Ascensor con un medio de transmision en forma de correa, especialmente con una correa trapecial con dentado interior, como medio portante y/o agente motor.
EP2032491B1 (fr) 2006-06-26 2015-09-09 Otis Elevator Company Installation d'ascenseur avec dimensions de cage réduites
BRPI0721572A2 (pt) 2007-05-22 2013-01-15 Thyssenkrupp Elevator Ag parte eletromotora de um direcionador de elevador e mÉtodo de enrolamento de enrolamentos de uma parte eletromotora de um direcionador de elevador
EP1995852A3 (fr) 2007-05-22 2009-12-16 ThyssenKrupp Aufzugswerke GmbH Entraînement d'ascenseur et son procédé de fabrication
EP2167414B1 (fr) * 2007-06-08 2013-04-24 Otis Elevator Company Système d'ascenseur avec axe de guidage aligné sur un élément de traction
EP2230204A1 (fr) 2009-03-20 2010-09-22 Inventio AG Ascenseur à poulie motrice, entraînement d'ascenseur pour un tel ascenseur à poulie motrice et procédé de fonctionnement d'un tel entraînement à poulie motrice
CN103874797B (zh) * 2011-10-13 2016-05-25 贝卡尔特公司 一种包括钢丝绳和护套的承载组件及其制造方法

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US4739696A (en) 1986-10-21 1988-04-26 Sheen Shuenn T Separative tea brewing apparatus
US5783895A (en) 1994-04-07 1998-07-21 Kone Oy Elevator motor with flat construction
FI95689C (fi) * 1994-06-23 1996-03-11 Kone Oy Hissikoneisto
BR9500779A (pt) * 1994-03-02 1995-10-24 Inventio Ag Cabo como meio de suporte para elevadores
JPH09142761A (ja) 1995-11-24 1997-06-03 Mitsubishi Electric Corp エレベータ用巻上機
JPH1017245A (ja) 1996-06-28 1998-01-20 Mitsubishi Electric Corp エレベータ用巻上機
JPH10152274A (ja) 1996-11-22 1998-06-09 Hitachi Ltd ロープ式エレベータ
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2489622A1 (fr) 2011-02-16 2012-08-22 Scanclimber Oy Monte-charge de bâtiment

Also Published As

Publication number Publication date
EP1023236B2 (fr) 2009-02-04
ES2211130T3 (es) 2004-07-01
DE69914577C5 (de) 2014-11-20
DE69914577T2 (de) 2005-01-05
ES2211130T5 (es) 2009-05-25
DE69914577D1 (de) 2004-03-11
WO1999043590A1 (fr) 1999-09-02
PT1023236E (pt) 2004-06-30
EP1023236A1 (fr) 2000-08-02
DE69914577T3 (de) 2009-05-14

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