• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A hybrid strand (1) having a core (2) and outer wires (3 ') disposed around said core (2), at least a portion of said outer wires (3') being compressed, said compacted outer wires having a flattened cross-sectional shape.
    公开号:AT517491A1
    申请号:T50649/2015
    申请日:2015-07-23
    公开日:2017-02-15
    发明作者:Traxl Robert；Kaiser Gunter；Kirth Rudolf；Ernst Björn；Rührnössl Erich；Baldinger Peter；O'hear Nicholas
    申请人:Teufelberger Seil Ges M B H；
    IPC主号:
    专利说明:

    The invention relates to a hybrid strand with a core and arranged around this core, each other laterally contacting outer wires.
    Furthermore, the subject of the invention is a rope with several such hybrid strands. Moreover, the invention also relates to a method for producing such Hybdridlitzen.
    In US 5,946,898 A a wire rope with an independent wire rope core is known. Described is also a cable assembly of hybrid strands, which have a fiber core and arranged around this wires; This rope is used as a core rope inside the total provided wire rope. The aim of this known rope is to prevent any pushing of wires or strands within the cable structure, and it is proposed to compress the entire cable and thereby reduce the cross-section of the compacted rope compared to the uncompressed cable.
    In contrast, it is an object of the invention to provide hybrid strands with a comparatively small diameter or with a comparatively high breaking force, in relation to a predetermined diameter, wherein the hybrid strands or a rope made from these hybrid strands should also have a relatively low weight.
    Accordingly, the invention provides a hybrid strand with a core and with external wires touching each other around this core, wherein it is provided in particular that at least some of the wires are compacted and have a flattened cross-sectional shape. Of course, the present hybrid braid may have several layers of wires around the core, with particular importance being given to the mutual contact of the outer wires, in the outer layer, at least during manufacture, and their compression to a flattening of the cross section.
    The outer wires may have an approximately trapezoidal or circular segment-shaped cross-sectional shape. Furthermore, it is favorable for the stability and compactness when the outer wires touch each other flat on the sides. Alternatively, in the hybrid strand, a laterally flattened region of a first compressed outer wire may face a lateral flattened region of an adjacent compressed outer wire in a distance which is preferably substantially constant in sections. Expediently, the outer wires continue to be made of steel; the core is in particular a fiber core, ie a core of natural fibers or synthetic fibers, plastic fibers being preferred because of their higher load capacity.
    The compaction of the outer wires is performed using a known compaction tool. A special feature is that in the present case not a rope made from a plurality of hybrid strands is compacted by means of such a compaction tool, as proposed in the aforementioned US Pat. No. 5,946,898 A, but that components of the rope, namely the hybrid strands, prior to the manufacture of the final rope already compressed.
    It should be mentioned that ropes made of uncompressed hybrid strands have a comparatively low breaking strength at the same diameter compared to compacted solid steel ropes. In order to achieve a breaking strength comparable to solid steel ropes, an uncompressed hybrid rope must have a larger diameter, thereby providing a higher weight, apart from the extra cost of such a rope.
    Due to the compression of the hybrid strands provided here, the outer wires are cold-worked, and the cross-section of the outer wires is flattened, starting from a round cross section, in particular an approximately trapezoidal or kreissegmentför-miger cross-section is obtained. It is essential that the voids between the wires are minimized by the compression process, wherein the relative metallic cross-section and thus the breaking strength of the hybrid braid is significantly increased.
    Thus, with the present hybrid strands, a comparatively lightweight compacted hybrid cable can be obtained, which can have a lower weight per unit length and a higher specific strength compared to a compacted steel cable with the same nominal rope diameter.
    Advantageously, the rope made from the present hybrid strands may be a non-rotating rope, i. the torques of the hybrid strands can cancel each other out or at least largely compensate each other with a corresponding arrangement within the rope, unlike conventional hybrid cables, in which a fiber core is surrounded by solid steel wire strands, then no freedom of rotation can be achieved because the torques of the fibers and the steel wires are too different.
    In the method according to the invention for the production of the hybrid strands, wires or outer wires are beaten and compacted around a core, in particular around a fiber core, wherein the outer wires have at least almost contact in a still uncompacted state, during compression in a lateral contact area, preferably flat, touch and wherein at least a portion of the outer wires after compaction has a flattened in the contact area cross-sectional shape.
    For the compressed wire strands, any internal wires should have the same transverse compressive stiffness as the outer wires, i. the wires of the outer wire layer, and thereby the wires can build up the counterpressure needed to deform the outer wires. However, a fiber core per se could not withstand the external pressure of a compaction tool (e.g., rollers, dies, or hammers); the fiber core gives way rather. As a result, the outer wires can not be sufficiently deformed per se. Thus, after "compacting", ie passing a compacting tool, the hybrid strand may spring back again, ie when the back pressure is built up only through the fiber core, the wires will move radially outward again after densification and no deformation of the wires will remain In the present method, on the other hand, the fiber core yields at most until the wires, in particular the wires of an outer layer in the case of multiple layers of wires, completely contact each other, whereby it is favorable when these external wires are in the manner of a By this mutual support of the wires as a result of vaulting, the total radial pressure acts on the outer wire layer during compression, and the desired plastic cold deformation of the outer wires can take place If the wires pressed during compression before the vault formation a little way against the fiber core were , they can spring back by a corresponding amount after compression, so that the deformed wires of the compressed hybrid strand can be slightly spaced. To achieve this "vaulting" a corresponding number of outer wires, with a corresponding wire diameter and corresponding impact angle of the rope wires, provide, as can be found in practice, depending on the overall dimensions of the rope to be manufactured easily.
    For example, the combination of eleven wires with a diameter of 0.85 mm and a throw angle of 17 ° has been found to be favorable to produce a compressed 3.8 mm diameter hybrid strand. However, the number of external wires can be e.g. from 3 to 20, wherein the range of 8 to 14 has been found to be particularly favorable due to the weight distribution between the fiber core and outer wires. The impact angles can be from 5 ° to 30 °, depending on the number of wires, with the range of 15 ° to 25 ° has proven to be particularly favorable. Depending on the choice of wire diameter, this results in hybrid strands with different diameters. The degree of compaction is determined by appropriate dimensioning of the starting and final diameters. Here, a diameter reduction of the strands is possible by a compression in the range of 2% to 20%, depending on the number of outer wires, with the range of 4% to 10% has proved favorable.
    Overall, by the present technique, using steel wires, ropes with hybrid strands can be obtained, which, when they have the same breaking strength as a conventional steel cable, have a weight that is about 30% lower, or a comparatively similar weight have significantly higher breaking strength.
    The invention will be described below with reference to preferred embodiments, to which it should not be limited, with reference to the drawings even further. In the drawing show:
    Fig. 1 shows schematically in axonometric view a portion of a hybrid strand before the compression of the outer wires;
    Fig. 2 is a similar axonometric view of this hybrid strand after the compression of the wires of the outer layer;
    3 shows a cross section through a non-rotation-free hybrid cable with such hybrid strands. and
    Fig. 4 shows a rotation-free hybrid cable using such hybrid strands.
    In Fig. 1, a part of a hybrid strand 1 is schematically shown in perspective view. This hybrid strand 1 has a fiber core 2 and steel wires 3 beaten around this fiber core 2, wherein in the example shown in FIG. 1 only one layer of wires (outer wires) 3 is shown. However, it would be conceivable to provide here (as well as in the following examples) two or more layers of wires, with an outer layer of wires 3, which are cold-worked in the subsequent compression.
    Such a cold deformation can be seen in the illustration in Fig. 2, wherein it can be seen that the wires 3 'around the fiber core 2 around now, after compaction, lie flat against each other with their sides and have an approximately trapezoidal cross-section. Overall, the hybrid cable or hybrid strand 1 now has a smaller cross section compared to FIG. 1, with a compression of the (outer) wire layer 4 with the wires 3 '.
    In Fig. 3 is a cross section through a hybrid cable 5 is shown, which is not rotation-free in this embodiment, and were used in the compressed hybrid strands 1 of FIG. in the
    Specifically, a core hybrid wire 6 is provided around which six hybrid strands of an inner strand layer 7 are arranged. Finally, an outer layer 8 with eight hybrid strands 1 (according to FIG. 1) is provided, wherein a plastic intermediate layer 9 supports the outer hybrid strands 1 of this outer layer 8, as is known per se.
    For comparison purposes, FIG. 4 shows a cross section through a rotation-free hybrid cable 10, wherein comparable hybrid strands 1, s. Fig. 2, on the one hand for the core 11 of the rope 10 and on the other hand for the construction of a total of three Litzenlagen 12, 13 and 14 are used. The hybrid strands (1 in FIG. 2) also have different diameters in order to achieve a compact design.
    The hybrid cable 10 according to FIG. 4 is free of rotation, wherein no plastic intermediate layer or support body, as shown in the case of the cable 5 according to FIG. 3, are used.
    The cross sections of FIG. 3 and FIG. 4 are examples of possible cable structures, of course, also given a variety of other cable construction options.
    As can be seen in particular from FIG. 2, the compaction of the hybrid strand 1 or the cold deformation of the outer wires 3 'results in more compact cross sections, the overall cross section of the hybrid strand 1 decreasing, and the cross sections of the wires 3 being of a round cross sectional shape an approximately trapezoidal or circular segment shape (wires 3 ') change. The voids between the wires 3 and 3 'are reduced by the compression process, wherein the relative metallic cross-section and thus the breaking strength of the hybrid strand 1 is substantially increased. Overall, ropes 5 and 10 are made possible in this way, which at a same breaking strength as a conventional steel cable can have a by about 30% lower weight, or vice versa can have a much higher breaking load at the same weight.
    In Table 1 below, values for a conventional densified steel cord and a compacted hybrid cord, such as shown in Figure 3, are contrasted.
    Table 1: _ __
    The compacted hybrid rope has a 40% higher specific strength compared to a compacted solid steel rope.
    A comparison of a compacted and an uncompressed hybrid rope (with the same breaking strength) yields - according to Table 2 - the following nominal rope diameters.
    Table 2:
    _
    For the sake of completeness, it should be stated that the term "specific breaking force" is understood to mean the ratio of the general breaking force to the length weight of a rope.
    权利要求:
    Claims (12)
    [1]
    claims
    A hybrid strand (1) comprising a core (2) and outer wires (3 ') disposed around said core (2), characterized in that at least part of said outer wires (3') are compacted, said compacted outer wires being flattened Have cross-sectional shape.
    [2]
    2. Hybrid strand according to claim 1, characterized in that the compressed outer wires (3 ') have an approximately trapezoidal or circular segment-shaped cross-section.
    [3]
    3. Hybrid strand according to claim 1 or 2, characterized in that the compressed outer wires (3 ') laterally, preferably flat, touch each other.
    [4]
    A hybrid strand according to claim 1 or 2, characterized in that a laterally flattened portion of a first compressed outer wire (3 ') is opposed to a side flattened portion of an adjacent compressed outer wire (3') at a distance.
    [5]
    5. Hybrid strand according to claim 4, characterized in that the distance between the opposing flattened areas is at least partially substantially constant.
    [6]
    6. hybrid strand according to one of claims 1 to 5, characterized in that the outer wires (3 ') consist of steel.
    [7]
    7. Hybrid strand according to one of claims 1 to 6, characterized in that the core (2) is a fiber core.
    [8]
    8. rope (5, 10) with a plurality of hybrid strands (1) according to one of claims 1 to 7.
    [9]
    9. rope (10) according to claim 8 in the form of a rotation-free rope.
    [10]
    10. A method for producing a hybrid stranded wire (1), wherein outer wires (3) around a core (2), in particular fiber core, beaten around and compacted and the outer wires (3) in the still uncompacted state at least almost contact, during the compression each other touch in a lateral contact area, preferably flat, and wherein at least a part of the outer wires (3 ') after compression has a flattened in the contact area cross-sectional shape.
    [11]
    11. The method according to claim 10, characterized in that support the outer wires (3) during the compaction vault-like mutually.
    [12]
    12. The method according to claim 10 or 11, characterized in that as core (2) a fiber core is used and or or as external wires (3, 3 ') steel wires are used.
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    KR1020187005472A| KR102164438B1|2015-07-23|2016-07-21|Hybrid stranded conductor|
    PCT/AT2016/060012| WO2017011847A1|2015-07-23|2016-07-21|Hybrid stranded conductor|
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    JP2018522822A| JP6687730B2|2015-07-23|2016-07-21|Hybrid stranded|
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    EP16753571.5A| EP3325711B1|2015-07-23|2016-07-21|Hybrid stranded conductor|
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