WO2019141895A1 - Procédé et appareil d'optimisation de la tension de l'agencement de suspension d'un ascenseur - Google Patents

Procédé et appareil d'optimisation de la tension de l'agencement de suspension d'un ascenseur Download PDF

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Publication number
WO2019141895A1
WO2019141895A1 PCT/FI2018/050043 FI2018050043W WO2019141895A1 WO 2019141895 A1 WO2019141895 A1 WO 2019141895A1 FI 2018050043 W FI2018050043 W FI 2018050043W WO 2019141895 A1 WO2019141895 A1 WO 2019141895A1
Authority
WO
WIPO (PCT)
Prior art keywords
elevator
tension
loop
elevator car
suspension
Prior art date
Application number
PCT/FI2018/050043
Other languages
English (en)
Inventor
Matti RÄSÄNEN
Riku Lampinen
Hannu Lehtinen
Esko Aulanko
Original Assignee
Kone Corporation
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 Kone Corporation filed Critical Kone Corporation
Priority to KR1020207021470A priority Critical patent/KR102507242B1/ko
Priority to PCT/FI2018/050043 priority patent/WO2019141895A1/fr
Publication of WO2019141895A1 publication Critical patent/WO2019141895A1/fr

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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
    • B66B11/0065—Roping
    • B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • B66B11/009—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave with separate traction and suspension ropes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables

Definitions

  • the present invention relates to a method as defined in the preamble of claim 1 and an apparatus as defined in the pream ble of claim 8 for optimizing the tension of the suspension arrangement of an elevator.
  • elevators have a safety factor for suspension members, such as ropes or corre sponding members.
  • the safety factor means that the suspension members must be strong enough and have enough tension, so that there is enough friction between the suspension members and the traction sheave. If the friction is too low the sus pension members might slip on the traction sheave. This prob lem may occur often while loading and unloading the elevator car, especially in high-rise elevators. In high-rise elevators the suspension members elongate quite much.
  • elevators known from the prior art comprise usually many suspension members. How ever, the tension of the suspension members need not to be as high when the elevator car is moving as when the car is being loaded or unloaded. Thus, elevators could be made with fewer number of suspension members if the tension of the suspension arrangement could be increased in some other way while load ing and unloading the elevator car. This way the elevator masses would be lower, space and materials would be saved and also the costs would decrease.
  • the objective of the present invention is to eliminate draw backs of the prior art technology and to achieve a cost- effective and space-saving method and apparatus for optimiz- ing the tension of the suspension arrangement of an elevator. Another objective is to make an elevator with fewer suspen sion members, compensation members and/or alike while ful filling the safety factor, which is set to the elevator by the regulations.
  • the method according to the invention is characterized by what is disclosed in the characterization part of claim 1.
  • the apparatus according to the invention is characterized by what is disclosed in the characterization part of claim 8.
  • Other embodiments of the invention are char acterized by what is disclosed in the other claims.
  • inventive content of the application can also be defined differently than in the claims presented below.
  • inventive content may also consist of several separate inventions, es pecially if the invention is considered in the light of ex pressions or implicit sub-tasks or from the point of view of advantages or categories of advantages achieved.
  • some of the attributes contained in the claims below may be superfluous from the point of view of separate in ventive concepts.
  • the different details presented in connection with each embodiment can also be applied in other embodiments.
  • at least some of the subordinate claims can, in at least some situations, be deemed to be inventive in their own right.
  • the pre sent invention provides a method and apparatus for adjusting the tension of the suspension arrangement of the elevator.
  • the adjustment is made by adjusting the length of a closed loop formed by at least a traction member and a suspension member or a combined traction and suspension member of the elevator.
  • the adjustment is made with help of an adjustment device, which is, for example, connected to a diverting pul ley or the hoisting machinery of the elevator.
  • the tension / length of the closed loop is adjusted depending on the state, in which the elevator currently is. For example, the tension is adjusted tighter for the loading and unloading of the ele- vator car than for the driving state of the elevator.
  • the adjustment device is a hydraulic actuator.
  • suspension arrangement of the elevator can be made lighter, which usually means with fewer number of suspension members, compensation members and/or other members, such as traction belts, while the arrangement still fulfills the safety factor set to the elevator.
  • the use of material and costs of the elevator are significally reduced because fewer number of ropes or alike and other parts are needed. Hence the solution lowers the costs of the elevator and saves space in the elevator shaft.
  • the above-mentioned advantage is em phasized in high-rise elevators.
  • a further advantage of the invention is that the tension of the suspension arrangement must not be kept at high level all the time, which increases the lifetime of the parts belonging to the suspension arrangement, such as ropes, traction sheave, pulleys and bearings, etc.
  • the layout of the elevator can be designed more freely.
  • the location of the hoisting machinery can be chosen more freely.
  • the hoisting machinery can be located at the bottom of the elevator shaft, in which case e.g. need of electric cables at the top part of the shaft is reduced.
  • Yet a further advantage of the invention is that it is possi ble to affect to swaying of the suspension ropes or alike. Swaying of the ropes can be a big problem escepecially in high-rise elevators and particularly in windy conditions.
  • Fig . 2 presents in a simplified and diagrammatic side view another kind of elevator where the embodiment of Fig. 1 is applied,
  • Fig . 3 presents in a simplified and diagrammatic side view yet another kind of elevator where the embodiment of Fig. 1 is applied,
  • Fig. 4 presents in a simplified and diagrammatic side view an elevator according to Fig. 3 where another em bodiment of the solution according to the invention is applied and
  • Fig . 5 presents in a simplified and diagrammatic side view an elevator according to Fig. 3 where yet another embodiment of the solution according to the inven tion is applied.
  • FIG. 1 presents an elevator where an embodiment of the solu tion according to the invention is applied.
  • the elevator 1 comprises a hoisting machinery 3 provided with a traction sheave 2, which hoisting machinery 3 is located at the upper part of the elevator shaft.
  • the suspension ratio of the elevator is 1:1.
  • the elevator 1 comprises also an elevator car 5, a balance weight 6, the control system 20 of the elevator 1 and a traction member 4, which is arranged to act also as a suspension member of the elevator car 5.
  • the traction member 4 comprises for example one or more ropes, belts or some other suitable members.
  • the first end of the traction member 4 is fastened to the upper part of the elevator car 5, from where the traction member 4 is led up to go round the traction sheave 2 and from there furthermore down to the balance weight 6.
  • the second end of the traction member 4 is fastened to the upper part of the balance weight 6.
  • the trac tion member 4 is arranged to convert the rotating motion of the traction sheave 3 to the linear motion of the elevator car 5 and the balance weight 6.
  • the elevator 1 comprises a compensation member 7, which is fastened at the bottom part of the elevator car 5 from its first end and arranged to go round a diverting pulley 8, which is located at the bottom part of the elevator shaft and from there again up to the balance weight 6.
  • the second end of the compensation member 7 is fas tened at the bottom part of the balance weight 6.
  • the traction member 4, the compensation member 7, the elevator car 5 and the balance weight 6 together form a closed loop 16.
  • the loop 16 may comprise also some other parts of the elevator, such as a sling of the elevator car 5.
  • balance weight 6 When the term balance weight 6 is used in this context, it is intended to mean either a balance weight or a counter weight. In addition, where only one balance weight 6 is mentioned be low, one or more balance weights or, alternatively, counter weights are meant. Also, when only one traction member 4 is mentioned below, one or more parallel traction members, such as toothed belts, V-belts, flat belts, chains or ropes, are meant. Similarly, when only one compensation member 7 is mentioned below, one or more parallel compensation members, such as steel ropes, are meant. Likewise, when only one suspension member is mentioned below, one or more parallel suspension members, such as steel ropes, are meant.
  • an ad justment device 9 is arranged, which adjustment device 9 is connected to the diverting pulley 8 and provided with a control system 17.
  • the adjustment device 9 is arranged to actively adjust the length of the closed loop 16.
  • the elevator 1 comprises also one or more sensors 18 to measure for example the position and/or speed and/or acceleration of the elevator car 5, sway of the differ- ent members of the loop 16 and the tension of the loop 16.
  • the elevator 1 comprises also at least one sensor 19, which is arranged to measure the tension of the loop 16.
  • the adjustment device 9 is arranged to use the measurement information for adjusting the length of the loop 16.
  • the length is adjusted depending on the situation.
  • the tension of the system does not have to be as high and then the adjustment device 9 is arranged to adjust the length of the loop shorter.
  • the tension of the system may also be adjusted in such a case that the different members of the loop 16 start to sway in the elevator shaft.
  • the elevator 1 is always in some certain state. Different states are at least acceleration, deceleration, driving at a constant speed and a state where the elevator car 5 is station ary at some floor level and the elevator car 5 can be loaded or unloaded.
  • the tension of the loop 16 is adjusted actively to be as optimal as possible based on the measurement information of the sensors 18 and 19 and the state, in which the elevator 1 currently is. The adjustment is made with help of the adjust ment device 9 and its control system 17. Also the control sys tem 20 of the elevator 1 may be arranged to help with the ad justment .
  • the adjustment device 9 is a hydraulic actu ator, which is arranged to move the diverting pulley 8 upwards and downwards.
  • the adjustment device 9 is also arranged to adjust the closed loop 16 to a suitable pre-tension and to keep the tension of the loop in a proper tension if the elevator ropes, for example, elongate in the course of time.
  • the adjust ment device 9 may be arranged to adjust the length of the loop 16 alone or it can be arranged to make the adjustment with help of the drive of the hoisting machinery 3.
  • Figure 2 presents another elevator where the embodiment of Fig. 1 is applied. In this elevator 1 a hoisting machinery 3 provid ed with a traction sheave 2 is located at the bottom part of the elevator shaft.
  • the suspension arrangement of the elevator 1 is similar to the embodiment of Fig. 1, except for the ar rangement does not comprise a balance weight.
  • the suspension arrangement forms a closed loop 16, which comprises a traction member 4 and an elevator car 5.
  • the traction member 4 is ar ranged to act also as a suspension member of the elevator car 5.
  • an adjustment device 9 provided with a control system 17 is connected to the hoisting machinery 3.
  • the adjustment device 9 is arranged to adjust the length of the closed loop 16 by moving the hoisting machinery 3 up and down.
  • the elevator 1 comprises also at least one sensor 18, which is arranged to fuction in the same way as the sensor 18 of the embodiment of Fig. 1.
  • FIGS 3, 4 and 5 present another elevator where the solution according to the invention is applied.
  • the elevator 1 comprises an elevator car 5, a balance weight 6 and a hoisting machinery 3 provided with a traction sheave 2, which hoisting machinery 3 is located at the bottom of the elevator shaft.
  • the elevator 1 also comprises a traction member 4 and a suspension member 10, which in this embodiment are separate members.
  • the traction member 4 is e.g. a toothed belt, V-belt or a like and it is fastened from its first end to the bottom of the elevator car 5. From there the traction member 4 is led down to go round the traction sheave 2 and further up to go round a diverting pulley 12 and again down to go around another diverting pulley 11 and then up to the balance weight 6.
  • the second end of the traction member 4 is fastened to the bottom of the balance weight 6.
  • the suspension member 10 is e.g. a steel rope and it is fastened from its first end to the upper part of the elevator car 5 and from there it is led up to go round diverting pulleys 13 and 14 and again down to the balance weight 6.
  • the second end of the suspension member 10 is fastened to the upper part of the bal ance weight 6.
  • the traction member 4, the suspension member 10, the elevator car 5 and the balance weight together form a closed loop 16.
  • the elevator 1 comprises one adjustment device 9, which is located at the bottom part of the elevator shaft and connected to the hoisting machinery 3.
  • the elevator 1 comprises two adjustment devices 9.
  • the first adjustment device 9 is located at the bottom part of the elevator shaft and connected to the hoisting machinery 3.
  • the second adjustment device 9 is located at the upper part of the elevator shaft and connected to the diverting pulley 14.
  • the elevator 1 comprises one adjustment device 9, which is located at the upper part of the elevator shaft and connected to the diverting pulley 14.
  • the adjustment devices 9 comprise a control system 17 and the elevator 1 comprises a sensor 18.
  • the adjustment devices 9 and sensors 18 are arranged to function in the same way as in em bodiments of Figs. 1 and 2 to change the length of the closed loop 16.
  • the length of the closed loop 16 formed by the traction member 4 and other mem bers and parts of the elevator 1 is pre-tensioned with an ad justment device 9 and/or the drive of the elevator 1.
  • the ten sion of the closed loop 16 and/or the location and/or the ac celeration and/or the deceleration and/or the speed and/or the load of the elevator car 5 are measured with the sensor or sensors 18.
  • the tension of the loop 16 is measured with a sen sor or sensors 19.
  • the length of the closed loop 16 is adjusted actively with help of at least one adjustment device 9 and the contor system 17 of the adjustment device 9 and/or the control system 20 of the elevator 1.
  • the adjustment of the length of the closed loop 16 is made by moving the hoisting machinery 3 of the elevator 1 and/or one of the diverting pulleys 8, 14 up or down.
  • the ad justment of the tension of the loop 16 is made depending on the state of the elevator 1 and the measurement information of the sensors 18 and 19. For example, the tension of the closed loop 16 is adjusted bigger when the elevator car 5 is being loaded or unloaded and smaller when the elevator car 5 is being driven at a constant speed in the elevator shaft.
  • the adjustment device could also be some other device than a hydraulic actuator.
  • the adjustment device can be, for example, a servomotor or any other actuator arranged to adjust the length of the closed loop.
  • the diverting pulley or alike, to which the adjustment device is connected is not necessarily moved in vertical direction to change the length of the closed loop. Instead, the move ment could also be done for example sideways or in some other way .
  • the adjustment device does not necessarily need to have an own control system. Instead, controlling of the adjustment device could be done also in some other way, for instance with help of the control system of the elevator.

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

Abstract

La présente invention concerne un procédé et un appareil permettant d'optimiser la tension de l'agencement de suspension d'un ascenseur comportant au moins une machinerie de levage (3) et une cabine d'ascenseur (5), ledit agencement de suspension comprenant une boucle fermée (16) pour déplacer la cabine d'ascenseur (5), ladite boucle (16) comprenant au moins un élément de traction flexible (4) et un élément de suspension (10) ou un élément de traction et de suspension combinées (4). La tension de la boucle (16) est mesurée de manière active et réglée sur la base de l'état actuel de l'ascenseur. Par exemple, la tension est réglée à un état plus serré pour le chargement et le déchargement de la cabine d'ascenseur (5) que pour l'état d'entraînement de l'ascenseur. La tension de la boucle (16) est réglée avec un dispositif de réglage (9).
PCT/FI2018/050043 2018-01-22 2018-01-22 Procédé et appareil d'optimisation de la tension de l'agencement de suspension d'un ascenseur WO2019141895A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020207021470A KR102507242B1 (ko) 2018-01-22 2018-01-22 엘리베이터의 서스펜션 설비의 장력을 최적화하는 방법 및 장치
PCT/FI2018/050043 WO2019141895A1 (fr) 2018-01-22 2018-01-22 Procédé et appareil d'optimisation de la tension de l'agencement de suspension d'un ascenseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2018/050043 WO2019141895A1 (fr) 2018-01-22 2018-01-22 Procédé et appareil d'optimisation de la tension de l'agencement de suspension d'un ascenseur

Publications (1)

Publication Number Publication Date
WO2019141895A1 true WO2019141895A1 (fr) 2019-07-25

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Application Number Title Priority Date Filing Date
PCT/FI2018/050043 WO2019141895A1 (fr) 2018-01-22 2018-01-22 Procédé et appareil d'optimisation de la tension de l'agencement de suspension d'un ascenseur

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KR (1) KR102507242B1 (fr)
WO (1) WO2019141895A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000886A2 (fr) * 2006-06-28 2008-01-03 Kone Corporation Dispositif dans un ascenseur sans contrepoids
WO2011147456A1 (fr) * 2010-05-27 2011-12-01 Kone Corporation Ascenseur et dispositif de surveillance de câble d'ascenseur
EP2913289A1 (fr) * 2014-02-28 2015-09-02 ThyssenKrupp Elevator AG Système élévateur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000886A2 (fr) * 2006-06-28 2008-01-03 Kone Corporation Dispositif dans un ascenseur sans contrepoids
WO2011147456A1 (fr) * 2010-05-27 2011-12-01 Kone Corporation Ascenseur et dispositif de surveillance de câble d'ascenseur
EP2913289A1 (fr) * 2014-02-28 2015-09-02 ThyssenKrupp Elevator AG Système élévateur

Also Published As

Publication number Publication date
KR20200108437A (ko) 2020-09-18
KR102507242B1 (ko) 2023-03-07

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