EP1023236B2 - Traction elevator system using a flexible, flat rope and a permanent magnet machine - Google Patents

Traction elevator system using a flexible, flat rope and a permanent magnet machine Download PDF

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Publication number
EP1023236B2
EP1023236B2 EP99936066A EP99936066A EP1023236B2 EP 1023236 B2 EP1023236 B2 EP 1023236B2 EP 99936066 A EP99936066 A EP 99936066A EP 99936066 A EP99936066 A EP 99936066A EP 1023236 B2 EP1023236 B2 EP 1023236B2
Authority
EP
European Patent Office
Prior art keywords
rope
car
elevator system
machine
hoistway
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
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1023236A1 (en
EP1023236B1 (en
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
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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/en
Publication of EP1023236A1 publication Critical patent/EP1023236A1/en
Application granted granted Critical
Publication of EP1023236B1 publication Critical patent/EP1023236B1/en
Publication of EP1023236B2 publication Critical patent/EP1023236B2/en
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.
  • JP-A-7117957 discloses an elevator device comprising a hoist constituted of an outer rotor motor provided of the top section of a hoistway.
  • a hoist constituted of an outer rotor motor provided of the top section of a hoistway.
  • an elevator system having a car and a counterweight disposed within a hoistway defined by hoistway walls, the elevator system including:
  • an elevator system as claimed in claim 1.
  • 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 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.
  • the load-carrying member are formed from steel cord.
  • the cord is formed from steel wires having diameters of 0.25 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.
  • 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.

Landscapes

  • 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)
EP99936066A 1998-02-26 1999-02-19 Traction elevator system using a flexible, flat rope and a permanent magnet machine Expired - Lifetime EP1023236B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03024661.5A EP1391413B2 (en) 1998-02-26 1999-02-19 Traction elevator system using a flexible flat rope

Applications Claiming Priority (7)

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
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 (en) 1998-02-26 1999-02-19 Traction elevator system using a flexible, flat rope and a permanent magnet machine

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP03024661.5A Division EP1391413B2 (en) 1998-02-26 1999-02-19 Traction elevator system using a flexible flat rope

Publications (3)

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

Family

ID=27363799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99936066A Expired - Lifetime EP1023236B2 (en) 1998-02-26 1999-02-19 Traction elevator system using a flexible, flat rope and a permanent magnet machine

Country Status (5)

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

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7890098A (en) * 1996-12-30 1998-07-31 Kone Corporation Elevator rope arrangement
DE19948946A1 (de) * 1999-10-11 2001-04-19 Wittur Ag Aufzug mit einem an einem Tragmittel gehaltenen Fahrkorb
BR0114189B1 (pt) † 2000-09-27 2010-03-09 elevador com unidade de acionamento, disposta dentro do poço do elevador acima lateralmente.
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
JP2005509578A (ja) * 2001-11-23 2005-04-14 インベンテイオ・アクテイエンゲゼルシヤフト ベルト状動力伝達手段、特に支持および／または駆動手段としてのくさび形リブ付きベルトを有するエレベータ
US9150384B2 (en) 2006-06-26 2015-10-06 Otis Elevator Company Elevator installation with reduced hoistway dimensions
EP1995852A3 (de) 2007-05-22 2009-12-16 ThyssenKrupp Aufzugswerke GmbH Aufzugantrieb und Verfahren zu seiner Herstellung
JP2010527869A (ja) 2007-05-22 2010-08-19 ティッセンクルップ・エレベーター・アーゲー エレベータ駆動装置の電気駆動部
WO2008148414A1 (en) * 2007-06-08 2008-12-11 Otis Elevator Company Elevator system with guide axis aligned with traction member
EP2230204A1 (de) 2009-03-20 2010-09-22 Inventio AG Treibscheibenaufzug, Aufzugsantrieb für einen solchen Treibscheibenaufzug und Verfahren zum Betreiben eines solchen Aufzugsantriebs
EP2489622A1 (en) 2011-02-16 2012-08-22 Scanclimber Oy Building hoist
EP2766522B1 (en) * 2011-10-13 2016-07-13 Bekaert Advanced Cords Aalter NV A load bearing assembly comprising a steel rope and a jacket

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU64779A1 (es) * 1972-02-15 1972-07-04
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
CZ282660B6 (cs) * 1994-03-02 1997-08-13 Inventio Ag Nosné lano zdvihacích a přepravních prostředků
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
JP3495549B2 (ja) 1997-03-14 2004-02-09 株式会社日立製作所 永久磁石モータおよびそれを利用したエレベーター

Also Published As

Publication number Publication date
DE69914577C5 (de) 2014-11-20
DE69914577D1 (de) 2004-03-11
DE69914577T2 (de) 2005-01-05
EP1023236A1 (en) 2000-08-02
EP1023236B1 (en) 2004-02-04
PT1023236E (pt) 2004-06-30
WO1999043590A1 (en) 1999-09-02
DE69914577T3 (de) 2009-05-14
ES2211130T3 (es) 2004-07-01
ES2211130T5 (es) 2009-05-25

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