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EP1391413A2 - Systeme d'ascenseur - Google Patents

Systeme d'ascenseur Download PDF

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Publication number
EP1391413A2
EP1391413A2 EP03024661A EP03024661A EP1391413A2 EP 1391413 A2 EP1391413 A2 EP 1391413A2 EP 03024661 A EP03024661 A EP 03024661A EP 03024661 A EP03024661 A EP 03024661A EP 1391413 A2 EP1391413 A2 EP 1391413A2
Authority
EP
European Patent Office
Prior art keywords
machine
rope
elevator system
car
load
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.)
Granted
Application number
EP03024661A
Other languages
German (de)
English (en)
Other versions
EP1391413B2 (fr
EP1391413B1 (fr
EP1391413A3 (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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=47844003&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1391413(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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 claimed from EP99936066A external-priority patent/EP1023236B2/fr
Publication of EP1391413A2 publication Critical patent/EP1391413A2/fr
Publication of EP1391413A3 publication Critical patent/EP1391413A3/fr
Application granted granted Critical
Publication of EP1391413B1 publication Critical patent/EP1391413B1/fr
Anticipated expiration legal-status Critical
Publication of EP1391413B2 publication Critical patent/EP1391413B2/fr
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.
  • an elevator system 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, substantially 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, which is incorporated herein by reference.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Ropes Or Cables (AREA)
EP03024661.5A 1998-02-26 1999-02-19 Système d'ascenseur à traction dans lequel un cable plat et souple est utilisé Expired - Lifetime EP1391413B2 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US31108 1998-02-26
US09/031,108 US6401871B2 (en) 1998-02-26 1998-02-26 Tension member for an elevator
US169415 1998-10-09
US09/169,415 US6397974B1 (en) 1998-10-09 1998-10-09 Traction elevator system using flexible, flat rope and a permanent magnet machine
US09/218,990 US6739433B1 (en) 1998-02-26 1998-12-22 Tension member for an elevator
US218990 1998-12-22
EP99936066A 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
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 Parent Applications (1)

Application Number Title Priority Date Filing Date
EP99936066A Division 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

Publications (4)

Publication Number Publication Date
EP1391413A2 true EP1391413A2 (fr) 2004-02-25
EP1391413A3 EP1391413A3 (fr) 2006-12-20
EP1391413B1 EP1391413B1 (fr) 2014-12-24
EP1391413B2 EP1391413B2 (fr) 2022-03-09

Family

ID=47844003

Family Applications (1)

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

Country Status (2)

Country Link
EP (1) EP1391413B2 (fr)
ES (1) ES2399413T5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1517850A1 (fr) 2002-06-07 2005-03-30 Kone Corporation Ascenseur pourvu d'un cable de levage revetu
EP2072447A1 (fr) * 2007-12-20 2009-06-24 Inventio Ag Agencement de moyens de portage pour une installation d'ascenseur, installation d'ascenseur dotée d'un tel agencement de moyens de portage, ensemble de moyens de portage pour une telle installation de moyens de portage et procédé de fabrication d'un tel agencement de moyens de portage

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362513A (en) * 1970-03-16 1974-08-07 Teleflex Ltd Cables and winching arrangements therefor
US4202164A (en) * 1978-11-06 1980-05-13 Amsted Industries Incorporated Lubricated plastic impregnated aramid fiber rope
SU1029346A1 (ru) * 1981-06-26 1983-07-15 Предприятие П/Я В-8624 Вентильный управл емый двигатель
GB2134209A (en) * 1982-12-30 1984-08-08 Blacks Equip Ltd Belts or ropes suitable for haulage and lifts
EP0631966A2 (fr) * 1993-06-28 1995-01-04 Kone Oy Arrangement pour fixer la machinerie d'un ascenseur au bâtiment
JPH07117957A (ja) * 1993-10-28 1995-05-09 Mitsubishi Electric Corp エレベーター装置
EP0688735A2 (fr) * 1994-06-23 1995-12-27 Kone Oy Machinerie d'ascenseur et son montage
US5566786A (en) * 1994-03-02 1996-10-22 Inventio Ag Cable as suspension means for lifts
JPH0921084A (ja) * 1995-07-06 1997-01-21 Yamamori Giken Kogyo Kk ワイヤロープ構造
JPH09142761A (ja) * 1995-11-24 1997-06-03 Mitsubishi Electric Corp エレベータ用巻上機
EP0841283A1 (fr) * 1996-11-11 1998-05-13 Inventio Ag Installation d'ascenseur avec unité de levage positionnée dans la cage
WO1998029326A1 (fr) * 1996-12-30 1998-07-09 Kone Corporation Dispositif de cable d'ascenseur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2136540A1 (de) † 1971-07-22 1973-02-01 Rudolf Dr Ing Vogel Aufzug
ES2189986T3 (es) † 1996-12-30 2003-07-16 Kone Corp Disposicion de cable de ascensor.

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362513A (en) * 1970-03-16 1974-08-07 Teleflex Ltd Cables and winching arrangements therefor
US4202164A (en) * 1978-11-06 1980-05-13 Amsted Industries Incorporated Lubricated plastic impregnated aramid fiber rope
SU1029346A1 (ru) * 1981-06-26 1983-07-15 Предприятие П/Я В-8624 Вентильный управл емый двигатель
GB2134209A (en) * 1982-12-30 1984-08-08 Blacks Equip Ltd Belts or ropes suitable for haulage and lifts
EP0631966A2 (fr) * 1993-06-28 1995-01-04 Kone Oy Arrangement pour fixer la machinerie d'un ascenseur au bâtiment
JPH07117957A (ja) * 1993-10-28 1995-05-09 Mitsubishi Electric Corp エレベーター装置
US5566786A (en) * 1994-03-02 1996-10-22 Inventio Ag Cable as suspension means for lifts
EP0688735A2 (fr) * 1994-06-23 1995-12-27 Kone Oy Machinerie d'ascenseur et son montage
JPH0921084A (ja) * 1995-07-06 1997-01-21 Yamamori Giken Kogyo Kk ワイヤロープ構造
JPH09142761A (ja) * 1995-11-24 1997-06-03 Mitsubishi Electric Corp エレベータ用巻上機
EP0841283A1 (fr) * 1996-11-11 1998-05-13 Inventio Ag Installation d'ascenseur avec unité de levage positionnée dans la cage
WO1998029326A1 (fr) * 1996-12-30 1998-07-09 Kone Corporation Dispositif de cable d'ascenseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MOLKOW M: "WIRE ROPES AND NEW SUSPENSION MEANS DESIGN, USE, SAFETY, HANDLING AND CARE, DISCARD CRITERIA", LIFT REPORT, VFZ VERLAG, DORTMUNT, DE, vol. 27, no. 5, 1 September 2001 (2001-09-01), pages 14,16,18-20, XP001092527, ISSN: 0341-3721 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1517850A1 (fr) 2002-06-07 2005-03-30 Kone Corporation Ascenseur pourvu d'un cable de levage revetu
US9428364B2 (en) 2002-06-07 2016-08-30 Kone Corporation Elevator provided with a coated hoisting rope
EP2072447A1 (fr) * 2007-12-20 2009-06-24 Inventio Ag Agencement de moyens de portage pour une installation d'ascenseur, installation d'ascenseur dotée d'un tel agencement de moyens de portage, ensemble de moyens de portage pour une telle installation de moyens de portage et procédé de fabrication d'un tel agencement de moyens de portage

Also Published As

Publication number Publication date
ES2399413T5 (es) 2022-06-07
EP1391413B2 (fr) 2022-03-09
EP1391413B1 (fr) 2014-12-24
ES2399413T3 (es) 2015-01-28
ES2399413T1 (es) 2013-04-01
EP1391413A3 (fr) 2006-12-20

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