Abstract:
The invention relates to method and apparatus for optimizing the tension of the suspension arrangement of an elevator provided at least with a hoisting machinery (3) and an elevator car (5), which suspension arrangement comprises a closed loop (16) for moving the elevator car (5), which loop (16) comprises at least a flexible traction member (4) and a suspension member (10) or a combined traction and suspension member (4). The tension of the loop (16) is measured actively and adjusted based on the current state of the elevator. For example, the tension is adjusted tighter for the loading and unloading of the elevator car (5) than for the driving state of the elevator. The tension of the loop (16) is adjusted with an adjustement device (9).
Abstract:
The object of the invention is a method and an apparatus for adjusting tension in the suspension arrangement of an elevator (1) provided with an elevator car (5), which suspension arrangement comprises at least a closed loop (16) provided with pretensioning for moving the elevator car (5), the closed loop comprising at least a flexible traction means (4) and suspension means (10), or a 1combined traction & suspension means, for the elevator car (5). The length of the closed loop (16) is actively adjusted by means of an adjusting device (9) for preventing vertical movement of the elevator car (5) when loading and unloading and for preventing excessive swaying of the elevator ropes.
Abstract:
A method for manufacturing a hoisting rope (R,R',R",R'") is disclosed, comprising the steps of providing a plurality of elongated composite members (1,1',1",1"'), which composite members (1,1',1",1 "') are made of composite material comprising reinforcing fibers (f) in polymer matrix (m); and arranging the composite members (1,1',1",1"') to form an elongated row (r,r',r",r"') of parallel composite members 1,1',1",1"' , which row (r,r',r",r"') has a longitudingal direction (L), a thickness direction (T) and a width direction (W), and in which row (r,r',r",r"') the composite members (1,1',1",1 "') are positioned side by side such that they are parallel to each other, and spaced apart from each other in width direction (W) of the row (r,r',r",r"'); and directing plasma treatment on the outer surface of the composite members (1,1',1",1"'); and embedding the composite members (1,1',1",1'") in fluid polymer material (2); and solidifying the polymer material wherein the composite members (1,1',1 ",1 "') are embedded. The invention relates also to a hoisting rope onbtained with the method and an elevator comprising the hoisting rope. An elevator load bearing belt obtained by said method is also disclosed.
Abstract:
The invention relates to a method for inspecting quality and/or condition of an elongated composite member (1), which is a load bearing member of a rope (2) of a hoisting apparatus, such as an elevator, or a precursor of such a load bearing member, the method comprising providing (100) an elongated composite member (1); and changing (200) the temperature of said elongated composite member (1) by heating or cooling said elongated composite member (1) via a flank (la,lb) thereof; and scanning (300) said elongated composite member (1) from a lateral side thereof with a thermal imaging device (3) after said changing (200) of the temperature; and creating (400) thermographic images (4) of said elongated composite member (1).
Abstract:
The object of the invention is an arrangement for reducing the displacement of an elevator car caused by a change in loading, which arrangement comprises at least an elevator car (1) configured to move up and down in an elevator hoistway and one or more counterweights (4), and also at least one rope element (2) above the elevator car (1) and at least one rope element (3) below the elevator car (1) and at least one pretensioning means (6) of the rope elements (2, 3). The elevator car (1) and counterweight (4) are configured to be supported and moved via the rope elements (2, 3) and a pretensioning means (6) and rope pulleys, of which rope pulleys the first part (8, 8a, 9- 12, 12a, 13, 14, 15-18) are diverting pulleys, and the second part are traction sheaves (5a). The arrangement additionally comprises at least two hoisting machines (5). In the arrangement are means (19) for locking at least two rope pulleys (5a, 8, 8a, 9-12, 12a, 13, 14, 15-18) to be non-rotating at least during loading of the elevator car (1).
Abstract:
The invention relates to an arrangement for protecting a component (2) in a power supply circuit (1 ). The arrangement comprises determination of an electric quantity constituting a load on the component (2), which electric quantity (6, 6', 6") constituting a load on the component is determined repeatedly while the component is exposed to the load. The arrangement also comprises estimation (8) of instantaneous load capacity of the component (2), which estimation of instantaneous load capacity (9, 9') is performed using a limitation criterion (5, 5', 5") set for the load capacity of the component. This limitation criterion (5, 5', 5") indicates the longest possible operating time of the component (2) under a given loading condition. For the limitation criterion (5, 5', 5"), a representation (4, 4') with respect to the electric quantity (6, 6', 6") constituting a load on the component is provided, and a limitation criterion corresponding to the defined electric quantity (6, 6', 6") constituting a load on the component is derived repeatedly from the said representation (4, 4') while the component (2) is exposed to the load. The estimate of instantaneous load capacity (9, 9') of the component is thus determined on the basis of both the limitation criterion (5) defined substantially at the estimation instant (7) and the limitation criteria (5', 5") defined before this.
Abstract:
The invention relates to a method for inspecting quality and/or condition of an elongated composite member (1), which is a load bearing member of a rope (2) of a hoisting apparatus, such as an elevator, or a precursor of such a load bearing member, the method comprising providing (100) an elongated composite member (1); and changing (200) the temperature of said elongated composite member (1) by heating or cooling said elongated composite member (1) via a flank (la,lb) thereof; and scanning (300) said elongated composite member (1) from a lateral side thereof with a thermal imaging device (3) after said changing (200) of the temperature; and creating (400) thermographic images (4) of said elongated composite member (1).
Abstract:
The invention relates to a method for inspecting condition of an elongated load bearing member (1) of a rope (3) of a hoisting apparatus, such as an elevator, the method comprising ultrasound scanning one or more regions (A,B,C) of the load bearing member (1) with an ultrasonic scanner (2).
Abstract:
The invention relates to a hoisting rope (2,2') for a hoisting apparatus, the hoisting rope (2,2') having a longitudinal direction (l), thickness direction (t) and width direction (w), and comprising a group (G) of load bearing members (3) made of composite material comprising reinforcing fibers (F) embedded in polymer matrix (m); and a coating (4) encasing said group (G) of load bearing members (3); wherein said load bearing members (3) extend in an untwisted manner inside the coating (4) parallel with each other as well as with the longitudinal direction (l) of the rope (2,2') throughout the length thereof, said load bearing members (3) being substantially larger in width direction than in thickness direction of the rope (2,2') and stacked against each other in thickness direction (t) of the rope (2,2'). The invention also relates to an elevator comprising said hoisting rope (2,2').