CN114728764B - Elevator belt with cords comprised of coated strands - Google Patents
Elevator belt with cords comprised of coated strands Download PDFInfo
- Publication number
- CN114728764B CN114728764B CN202080078595.6A CN202080078595A CN114728764B CN 114728764 B CN114728764 B CN 114728764B CN 202080078595 A CN202080078595 A CN 202080078595A CN 114728764 B CN114728764 B CN 114728764B
- Authority
- CN
- China
- Prior art keywords
- strand
- strands
- coating
- elevator belt
- core
- 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.)
- Active
Links
- 238000000576 coating method Methods 0.000 claims abstract description 45
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- 239000004744 fabric Substances 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 239000013536 elastomeric material Substances 0.000 claims abstract description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 28
- 239000011701 zinc Substances 0.000 claims description 28
- 229910052725 zinc Inorganic materials 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 claims description 2
- 238000013461 design Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 208000002599 Smear Layer Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- B66B7/062—Belts
Abstract
An elevator belt made of an elastomeric material, which has embedded and extending in the longitudinal direction of the belt stretch or reinforcement fabrics designed in the form of cords made up of a single or a plurality of strands, wherein the strands are made up of coated individual strands which are arranged around an individual strand serving as a strand core, preferably twisted around the individual strand, characterized in that the individual strands (individual strand king) making up the strand core are provided with a thicker coating than the individual strands surrounding the strand core.
Description
Technical Field
The invention relates to an elevator belt made of an elastomeric material, which has embedded stretch or reinforcement fabrics extending in the longitudinal direction of the belt, which are designed in the form of cords made up of a single or a plurality of strands, wherein the strands are made up of coated individual strands which are arranged around an individual strand serving as a strand core, preferably twisted around the individual strand.
Background
For some time in elevator technology, the steel cords that have been used exclusively in the past have been increasingly replaced by belt-like suspension devices, i.e. elevator belts. Such an elevator belt may be designed as a flat belt, a multi-ribbed belt or a belt of other profile made of an elastomeric material and provided with stretch or reinforcing fabrics embedded within the elastomeric material in the longitudinal direction of the elevator belt and mainly subjected to tensile forces.
The stretch fabric may be made of different materials, but is generally a relatively thin steel cord which is completely surrounded by an elastomeric material on the one hand and protected from corrosion by a coating on the other hand. In steel cords, the coating is typically a relatively thin zinc coating.
Steel cords are usually made of individual strands twisted around each other, which in turn are made of a plurality of individual wires twisted or twisted around each other.
During operation of the elevator belt and during bending of the elevator belt alternately over the guide wheels and the support wheels, the individual wires move relative to each other and friction is generated between the individual wires relative to the steel cord under load. The wear generated herein is referred to as "Fretting". Due to this friction between individual wires, the relatively thin coating of the wires, the steel cord or the zinc coating in the steel wires may be worn out. The subsequent friction between steel and steel starting in galvanized steel cords produces so-called "friction rust". This is undesirable and prevents unobstructed operation of the elevator.
Disclosure of Invention
It is therefore an object of the present invention to provide an elevator belt which has no or only a small amount of such a tendency to form friction rust and thus allows a longer running time before the so-called reject point is reached, i.e. the elevator belt has to be replaced.
This object is achieved by the features of the main claim. Further advantageous embodiments are disclosed in the dependent claims.
The individual wires, which form the strand core and are referred to in technical terms as "individual wires" are provided with a thicker coating than the individual wires surrounding the strand core. It has surprisingly been found by research and test bench operation that wear due to fretting wear has been minimized when the twisted wire core and the surrounding twisted wire are provided with different coating thicknesses in the manner according to the invention. This is not only the case in the inner strand of the cord, but also in the outer strand, which was not apparent before the test.
The effect of the abrasion reduction here appears to be based on the fact that the thickened coating can be used as a combined action of a "smear layer" and a "sacrificial layer". In any case, the zinc coating avoids or significantly delays the occurrence of brown friction rust, advantageously and particularly highlights that the cord is formed of a plurality of strands, with the central strand located inside being surrounded by a plurality of strands located outside.
An advantageous development consists in that the individual wires of the inner central strand, which form the strand core, have a thicker coating than the strand cores of the individual wires, which form the outer strands. Tests have also shown that by this measure it is possible to further reduce wear and to further increase the durability or service life of the elevator belt.
A further advantageous embodiment consists in that the coating of the individual wires forming the twisted wire core is at least 10% thicker, preferably more than 30% thicker, than the coating of the individual wires surrounding the twisted wire core. On the one hand, this difference can be produced entirely during the process. On the other hand, restrictions in terms of economic considerations are thereby ensured.
The same applies to another advantageous embodiment, which consists in that the coating of the individual wires constituting the twisted wire core is on average thicker than 2 μm. The expression "even thicker" is only seemingly inaccurate, however in practice it is necessary to consider the characteristics of different coating processes, where there may be deviations in the whole plane or length of the single line, and inherent to the process. Thus, for example, in the zinc coating of steel wires, a series of measurements are made of the length of the single wire, from which the average value is then determined. This takes into account the fact that: in the coating of such components, on the one hand, an optimization in terms of the smallest possible amount of coating material is sought, but on the other hand, the minimum layer thickness should not be exceeded.
Another advantageous design exists for most applications in that the cord is designed as a steel cord and the coating is a zinc layer. Thereby cord materials are obtained which can be relatively easy and inexpensive to manufacture, which in an optimal manner meet the requirements of the elevator belt.
Another advantageous embodiment of such a cord structure consists in that the zinc layer comprises a further alloy composition, preferably aluminum (Al). Thereby improving corrosion resistance and further reducing wear. The same applies to another advantageous embodiment, in which the elevator belt has a cord with a single wire, in which an iron-zinc alloy is formed between the zinc layer and the surface of the single wire.
Another advantageous design of the elevator belt consists in that the stretch or reinforcement fabric is designed as steel cords in the form of a7 x 7 construction. The central strand located inside has a single wire with a zinc coating of at least 1.5 μm or in the second variant of at least 2.5 μm constituting the strand core, and six single wires with a zinc coating of at least 1.0 μm or in the second variant of at least 2.0 μm surrounding the strand core. The six strands located on the outside each have a single strand constituting the strand core with a zinc coating of at least 1 μm or in the second variant of at least 2.0 μm and six single strands surrounding the strand core with a zinc coating of at least 0.5 μm or in the second variant of at least 1.0 μm.
Which of these two variants is better for the respective application, in particular depends on the length weight of the drawn fabric/cord, i.e. the length weight of the elevator belt provided in the design elevator structure.
Drawings
In addition to the other possible and typical structures, the second variant/design also serves as an embodiment as shown in fig. 1.
List of reference numerals
1. Cord thread
Fa1 single line/single line king (outer stranded wire)
Fa2 single line (outer stranded wire)
Fa3 single line (outer stranded wire)
Fa4 single line (outer stranded wire)
Fa5 single line (outer stranded wire)
Fa6 single line (outer stranded wire)
Fa7 single line (outer stranded wire)
L1 central stranded wire
L2 outer stranded wire
L3 outer stranded wire
L4 outer stranded wire
L5 outer stranded wire
L6 outer stranded wire
L7 outer stranded wire
Fi1 Single line/Single line king (Central stranded wire)
Fi2 single line (Central stranded wire)
Fi3 single line (Central stranded wire)
Fi4 single line (Central stranded wire)
Fi5 single line (Central stranded wire)
Fi6 single line (Central stranded wire)
Fi7 single line (Central stranded wire)
Detailed Description
Fig. 1 shows a cord or stretch fabric 1 of an elevator belt. The stretch fabric is a steel cord in the form of a7 x 7 structure, i.e. the cord or the stretch fabric 1 has seven strands L1 to L7, respectively, each strand having seven individual wires F1 to F7, i.e. a central strand L1 and six strands L2 to L7 surrounding the central strand externally. Each strand then in turn has a so-called "strand king" strand F1 as strand core, which is surrounded by six other strands F2 to F7.
For a better overview, the single line belonging to the inner central strand L1 is provided with a further symbol "i", so that the inner strands have single lines Fi1 to Fi7. Correspondingly, the individual wires of the strands L2 to L7 arranged around are provided with the further symbol "a", so that the strands located outside have individual wires Fa1 to Fa7, respectively.
The central strand L1 located inside has a single line Fi1 with a zinc coating of at least 2.5 μm constituting the strand core, and six single lines Fi2 to Fi7 with a zinc coating of at least 2.0 μm surrounding the strand core. The six outer strands L2 to L7 each have a single strand with a zinc coating of at least 2.0 μm constituting the strand core Fa1 and six single strands Fa2 to Fa7 with a zinc coating of at least 1.0 μm surrounding the respective strand core. Thus, in this case, the zinc coating of the respective inner cores Fa1 (of the outer strands L2 to L7) corresponds to the zinc coating of the outer single strands Fi2 to Fi7 of the inner strands L1.
Naturally, it is also possible to design other common cord structures in a manner according to the invention, for example structures of the type 7 x 19, 19+8 x 7, etc.
Claims (13)
1. An elevator belt made of an elastomeric material, which has a stretch or reinforcement fabric embedded and extending in the longitudinal direction of the belt, which stretch or reinforcement fabric is designed in the form of a cord made up of a single or a plurality of strands (L1-L7), wherein the strands are made up of coated single strands which are arranged around single strands serving as strand cores (Fi 1, fa 1), characterized in that the single strands constituting the strand cores are provided with a thicker coating than the single strands (Fi 2-Fi7; fa2-Fa 7) surrounding the strand cores.
2. Elevator belt according to claim 1, wherein the single thread is twisted around a single thread serving as a twisted wire core (Fi 1, fa 1).
3. Elevator belt according to claim 1, wherein the cord is formed of a plurality of strands, wherein an inner central strand (L1) is surrounded by an outer plurality of strands (L2-L7).
4. An elevator belt according to claim 3, wherein the single wire (Fi 1) of the central strand (L1) located inside, constituting the strand core, has a thicker coating than the strand core of the single wire (Fa 1) constituting the outer strands (L2-L7).
5. An elevator belt according to claim 1, wherein the coating of the single wires (Fi 1, fa 1) constituting the twisted wire core is at least 10% thicker than the coating of the single wires (Fi 2-Fi7; fa2-Fa 7) surrounding the twisted wire core.
6. An elevator belt according to claim 1, wherein the coating of the single wires (Fi 1, fa 1) constituting the twisted wire core is more than 30% thicker than the coating of the single wires (Fi 2-Fi7; fa2-Fa 7) surrounding the twisted wire core.
7. The elevator belt according to claim 5, wherein the coating of the individual wires constituting the twisted wire core is on average thicker than 2 μm.
8. The elevator belt of claim 4 wherein the cords are designed as steel cords and the coating is a zinc layer.
9. The elevator belt of claim 8 wherein the zinc layer comprises an additional alloy composition.
10. The elevator belt of claim 9, wherein the additional alloy composition is aluminum (Al).
11. The elevator belt according to claim 8 or 9, wherein an iron-zinc alloy is formed between the zinc layer and the single wire surface.
12. The elevator belt according to claim 8, wherein the stretch or reinforcement fabric is designed as a steel cord in the form of a7 x 7 structure, wherein the central strand located inside has a single wire with a zinc coating of at least 1.5 μm and six single wires with a zinc coating of at least 1 μm surrounding the strand core, while the six strands located outside each have a single wire with a zinc coating of at least 1 μm and six single wires with a zinc coating of at least 0.5 μm surrounding the strand core, which form the strand core.
13. The elevator belt according to claim 8, wherein the stretch or reinforcement fabric is designed as a steel cord in the form of a7 x 7 structure, wherein the central strand located inside has a single wire with a zinc coating of at least 2.5 μm constituting the strand core and six single wires with a zinc coating of at least 2.0 μm surrounding the strand core, while the six strands located outside each have a single wire with a zinc coating of at least 2.0 μm constituting the strand core and six single wires with a zinc coating of at least 1.0 μm surrounding the strand core.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019217625.9 | 2019-11-15 | ||
| DE102019217625.9A DE102019217625A1 (en) | 2019-11-15 | 2019-11-15 | Elevator belt with cords made of coated strands |
| PCT/EP2020/079350 WO2021094059A1 (en) | 2019-11-15 | 2020-10-19 | Cord of an elevator belt having strands formed from filaments having different coating thicknesses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114728764A CN114728764A (en) | 2022-07-08 |
| CN114728764B true CN114728764B (en) | 2024-03-12 |
Family
ID=72964695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080078595.6A Active CN114728764B (en) | 2019-11-15 | 2020-10-19 | Elevator belt with cords comprised of coated strands |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4058390B1 (en) |
| CN (1) | CN114728764B (en) |
| DE (1) | DE102019217625A1 (en) |
| WO (1) | WO2021094059A1 (en) |
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|---|---|---|---|---|
| DE3330909A1 (en) * | 1983-08-24 | 1985-03-07 | Siemens AG, 1000 Berlin und 8000 München | Method for producing a flexible electrical lead |
| DE3336616A1 (en) * | 1983-10-05 | 1985-04-25 | Siemens AG, 1000 Berlin und 8000 München | Drum-windable, flexible electrical cable having strand elements stranded in layers |
| CN1255229A (en) * | 1997-05-15 | 2000-05-31 | 皮雷利·卡维系统有限公司 | Cable with impact-resistant coating |
| JP2002275773A (en) * | 2001-03-19 | 2002-09-25 | Tokyo Seiko Co Ltd | Wire rope |
| JP2002327381A (en) * | 2001-04-25 | 2002-11-15 | Tokyo Seiko Co Ltd | Wire rope |
| CN1537189A (en) * | 2001-09-12 | 2004-10-13 | 株式会社日立制作所 | Rope |
| CN1875205A (en) * | 2003-11-03 | 2006-12-06 | 贝卡尔特股份有限公司 | Fine steel cord with a low structural elongation |
| CN101122097A (en) * | 2006-08-11 | 2008-02-13 | 因温特奥股份公司 | Belt for a lift facility, method for manufacturing such a belt and lift facility with a such belt |
| CN101121302A (en) * | 2006-08-11 | 2008-02-13 | 因温特奥股份公司 | Lift belt for a lift system and method for manufacturing such a lift belt |
| CN104575705A (en) * | 2013-10-12 | 2015-04-29 | 宁夏海洋线缆有限公司 | High-conductivity cable |
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| CN105448420A (en) * | 2014-09-26 | 2016-03-30 | 江苏东强股份有限公司 | High frequency data cable of 1200 MHz |
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| CN108138907A (en) * | 2015-10-06 | 2018-06-08 | 康蒂泰克驱动系统有限公司 | Multi-rib-belt |
| CN109562914A (en) * | 2016-07-19 | 2019-04-02 | 贝卡尔特先进帘线阿尔特公司 | Elevator tensile member with rigid thermoplastic polyurethane elastic body jacket |
| CN209456788U (en) * | 2018-12-28 | 2019-10-01 | 五合兴华通讯设备有限公司 | A kind of weather-proof anti-corrosion type insulation steel twisted wire |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100798967B1 (en) * | 2000-05-08 | 2008-01-28 | 엔.브이. 베카에르트 에스.에이. | A steel cord adapted for the reinforcement of thermoplastic elastomers |
| US20130171463A1 (en) * | 2010-08-13 | 2013-07-04 | Otis Elevator Company | Load bearing member having protective coating and method therefor |
-
2019
- 2019-11-15 DE DE102019217625.9A patent/DE102019217625A1/en active Pending
-
2020
- 2020-10-19 EP EP20793652.7A patent/EP4058390B1/en active Active
- 2020-10-19 WO PCT/EP2020/079350 patent/WO2021094059A1/en unknown
- 2020-10-19 CN CN202080078595.6A patent/CN114728764B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3330909A1 (en) * | 1983-08-24 | 1985-03-07 | Siemens AG, 1000 Berlin und 8000 München | Method for producing a flexible electrical lead |
| DE3336616A1 (en) * | 1983-10-05 | 1985-04-25 | Siemens AG, 1000 Berlin und 8000 München | Drum-windable, flexible electrical cable having strand elements stranded in layers |
| CN1255229A (en) * | 1997-05-15 | 2000-05-31 | 皮雷利·卡维系统有限公司 | Cable with impact-resistant coating |
| JP2002275773A (en) * | 2001-03-19 | 2002-09-25 | Tokyo Seiko Co Ltd | Wire rope |
| JP2002327381A (en) * | 2001-04-25 | 2002-11-15 | Tokyo Seiko Co Ltd | Wire rope |
| CN1537189A (en) * | 2001-09-12 | 2004-10-13 | 株式会社日立制作所 | Rope |
| CN1875205A (en) * | 2003-11-03 | 2006-12-06 | 贝卡尔特股份有限公司 | Fine steel cord with a low structural elongation |
| CN101121302A (en) * | 2006-08-11 | 2008-02-13 | 因温特奥股份公司 | Lift belt for a lift system and method for manufacturing such a lift belt |
| CN101122097A (en) * | 2006-08-11 | 2008-02-13 | 因温特奥股份公司 | Belt for a lift facility, method for manufacturing such a belt and lift facility with a such belt |
| CN104575705A (en) * | 2013-10-12 | 2015-04-29 | 宁夏海洋线缆有限公司 | High-conductivity cable |
| CN105448420A (en) * | 2014-09-26 | 2016-03-30 | 江苏东强股份有限公司 | High frequency data cable of 1200 MHz |
| CN204760078U (en) * | 2015-06-24 | 2015-11-11 | 上海谦恒电气有限公司 | Ribbon cable convenient to high -speed promotion |
| CN107039105A (en) * | 2015-09-11 | 2017-08-11 | 迈恩德电子有限公司 | Cable, the method and the method by cable boundling for manufacturing cable |
| CN108138907A (en) * | 2015-10-06 | 2018-06-08 | 康蒂泰克驱动系统有限公司 | Multi-rib-belt |
| CN105655038A (en) * | 2016-04-08 | 2016-06-08 | 长城电缆有限公司 | Fireproof cable and production process thereof |
| CN109562914A (en) * | 2016-07-19 | 2019-04-02 | 贝卡尔特先进帘线阿尔特公司 | Elevator tensile member with rigid thermoplastic polyurethane elastic body jacket |
| CN106057306A (en) * | 2016-08-17 | 2016-10-26 | 上海新时达线缆科技有限公司 | Cable used for elevator |
| CN209456788U (en) * | 2018-12-28 | 2019-10-01 | 五合兴华通讯设备有限公司 | A kind of weather-proof anti-corrosion type insulation steel twisted wire |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019217625A1 (en) | 2021-05-20 |
| CN114728764A (en) | 2022-07-08 |
| EP4058390A1 (en) | 2022-09-21 |
| WO2021094059A1 (en) | 2021-05-20 |
| EP4058390B1 (en) | 2023-09-13 |
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