DE3149783A1 - Wire rope - Google Patents

Abstract

Published without abstract.

Description

description

The invention relates to a wire rope with a filling element insert.

In the manufacture of a wire core rope, it is known in the art to the gap between the individual outer strands with a filler material, such as a thermoplastic resin, to fill in or a filler material in all gaps and spaces to be impregnated or introduced, including the gap between the core rope and the outer strands as disclosed in U.S. Patent 3,824,777. Such impregnated wire ropes have excellent properties in terms of wear resistance, fatigue strength and loss of wire rope breaking load by stranding and closing, as a result of suppression the wear contact of the individual outer strands or the outer strands with the core rope and by including the impregnated in the core rope and the strands. introduced lubricating oil. The conventional impregnated wire rope, in which the filling material is arranged contiguously around the entire outer circumference, but has one natural disadvantage, which is that the flexibility of the wire rope as a whole is deteriorated to a considerable extent. Furthermore, the filling material is opposite susceptible to tearing and peeling, especially when the rope is used as a running rope is used.

The present invention is therefore based on the object of a wire rope to create that no. Exhibits deterioration in flexibility and cracking as well as peeling off the filler material is prevented, while the basic effects in terms of higher wear resistance, improved fatigue strength and the reduction of the loss of wire rope breaking load through stranding and closing to be kept.

One feature of the wire rope according to the present invention is based on the fact that by filling a filler material in the spaces between the core rope and the corresponding outer Strands and / or in the gap between the individual outer strands is a filling or insert element is arranged independently in the corresponding spaces and columns, or that a gap and an outer adjacent strand split as one independent Treated unity. will.

Another feature of the invention is based on the fact that a Reinforcing core is anchored in the filling element, at least in the area the spaces between the core rope and the corresponding outer strands.

Further features emerge from the patent claims, various other objects, features, and advantages of the invention will be discussed hereinafter explained in more detail with illustrative embodiments, wherein in the Figures similar reference characters denote similar or corresponding parts.

They show: FIG. 1 - in an enlarged section, a wire rope according to FIG a first embodiment of the present invention, Figure 2 - a filling bZWt Insert element in a perspective partial view, Figure 3 - see in a schematic View of filling or insert elements with different cross-sectional shapes, FIG. 4 - a device for manufacturing the wire rope according to the present invention, Figure 5 - an enlarged section along the line V-v from Figure 4, Figure 6 - an enlarged view of a wire rope structure according to a second embodiment, FIG. 7 - in a perspective partial view that in the second embodiment used filling or insert element Figure 8 - in an enlarged sectional view a third embodiment of the present invention, Figure 9 - in a perspective Partial view of the filling or insert elements used in the third embodiment and FIG. 10 - a schematic representation to explain the text of the percentage of empty spaces.

In the first place it should be noted that the present invention is generally applicable to wire ropes, regardless of a wire rope core, Strand core and fiber 'core. The following description explains by way of example a wire rope with a wire rope core, in particular with an IWRC 6 x Fi (25) JIS Type 14.

FIG. 1 shows a core rope 1, around the periphery of which there are six outer strands 2 are arranged. Each of the between the core rope 1 and the outer strands 2 The intermediate spaces a formed are independent of a filling or insert element 3 filled out. This is made of a thermoplastic resin or the like and is formed into a cord-like shape corresponding to the space a has a substantially triangular cross-section, as shown in FIG. This filling element is used at the time of closing or manufacturing the rope with the core rope 1 and the outer strands 2 put together to form the gaps a similar to the outer strands 2 to be filled in independently of each other. In this In this case, the filling elements 3 are preferably shaped somewhat larger than the cross-section corresponds to the spaces a.

As a result, the filling elements 3 are in safe position due to the closing pressure Brought into contact with the core rope 1 and the outer strands 2, what the effect the filling elements favored, namely the effect of mutual separation of the core rope 1 as well as the outer strands 2 and the sealing effect for the lubricating oil (not shown), which is located between the core rope 1 and the outer strands 2.

The outer strands of the wire rope are arranged so that they one Have vacancy percentage in the range of 2.0-6.0%.

The reasons or relationships for this definition of the value h for the percentage of vacancies are given below.

Pitch circumference of the sum of the arcs AB Percentage of wire rope (= 2 #r) (= 6 AB) spaces h = x 100 (%) 2 er The radius r and the arcs AB are can be seen from FIG.

If a tightrope has a vacancy percentage greater than 2% is bent around a roll, it is possible on the inner side (compression side) the bend to avoid touching the strands. This is the reason that the minimum value of the vacancy percentage h is set to 2.0%. if on the other hand the beer place percentage h exceeds 6.0%, the core rope is from externally visible, which reduces the commercial value of the wire rope. aside from that a blank percentage of more than 6% inevitably requires a reduction the diameter of the outer strands, making it difficult to withstand the normal breaking load to guarantee. Thus, the maximum percentage of vacancies is. h 6.0 t. Become accordingly according to the present invention, the filling elements 3 with such a preconditioning placed that the vacancy percentage h is between 2.0 e and 6.0%.

It is preferred to have a reinforcing core 4 made from a wire or from Hemp to be anchored centrally in corresponding filling elements 3.

The reinforcement core 4 ensures a solidification or reinforcement of the filling elements 3 and prevents their tearing or detachment (peeling) in particular when it is used as a running rope during operation, while this results in the Breaking properties of the wire rope as a whole can be improved. Furthermore, it also has an influence on that during the closing or rope manufacturing process Breaking or tearing, falling or twisting of the filling element is prevented.

In addition to the shapes shown in FIGS it is possible to produce filling or insert elements 3 in various other shapes, as shown in FIG. In the context of the present invention takes place shaping into a suitable shape corresponding to that of the space a.

The wire rope described above with filling or insert elements is produced by a method and apparatus in the following manner In Figures 4 and 5, a feeder or feeder 5, spools or drums 6 for the outer strands 2 and the filling elements 3, a guide plate 7, a closing mold (closing die) 8, an oil supply tank 9, winches or rollers 10 and a take-up reel 11 shown. The guide plate 7 is provided with a core rope through hole 7a their center, furthermore with filling element through-holes formed radially outside thereof 7b and with through holes 7c for the outer strands, the through holes 7c are arranged radially outside of the through holes 7. The filling element through holes 7D are preferably shaped essentially in the same way as the filling element 3 around this to lead in a correct position. The core rope 1 and the filling elements 3, which from the feeder 5 and the bobbins 6 are fed by the corresponding Holes 7a and 7b of the guide plate 7 guided and thereby in a predetermined Relation in position held before they are twisted by the closing mold 8. on the wire rope formed with the filling elements from FIG. 1 is produced in this way and taken up or wound up on the roll 11; Thus, the wire rope can after he present invention in a simple manner basically according to a conventional one Wire rope manufacturing process and produced with a corresponding device the core rope 1, the outer strands 2 and the filling elements 3 through the guide plate 7 can be held in a predetermined positional relationship.

With the wire rope of the present invention it is possible to reduce the contact pressure, between the core rope 1 and the corresponding outer strands .2 by a dynamic load, especially during operation, is justified as a running rope will be considerably reduced, thereby reducing the wear and tear and fatigue of the core rope 1 and the outer strands 2 as well as the loss of wire rope breaking load Stranding and closing can be reduced. Furthermore, the Filler or insert elements 3 for sealing, and they prevent exudation des impregnated into the core rope 1 and the outer strands 2 Lubricating oil. Accordingly, the wear resistance and fatigue strength of the Wire rope improved overall, while the loss of wire rope breaking load due to Stranding and closing is reduced. Furthermore, the enclosed lubricating oil decreases the need for relubrication during operation of the wire rope, and it also has the effect of preventing internal corrosion for a long period of time.

In addition to the fundamental effects mentioned above, the filler element has 3 Another advantage, which is that there is no possibility of deterioration the flexibility of the wire rope is present as a whole, since the filling element is independent and is thus inserted structurally separately in the corresponding space a.

In addition, the reinforcing core 4 protects the filling element from a Damage, that is, cracking or peeling, to the above-mentioned effects of the filling elements for a relatively long period of time.

In Figures 6 to 9 are second and third embodiments of the Wire rope according to the present invention shown. With the wire rope from figure 6 are in addition to the filling elements 3, which are in the spaces a between the Core rope 1 and outer strands 2 in the same way as the previous one Embodiment are inserted, filling or insert elements 3 'with a d.; altell or spaces b of the outer strands adapted shape independently into these outer strands Column b is inserted (the filling or insert elements 3 and 3 'are subsequently described accordingly referred to as' inner filler element and 'outer filler element'). With the wire rope construction from Figure 8 are inner and outer filling elements 3 and 3 ', which according to the illustration in Figure 9 are formed into a one-piece body, in each space a and inserted an outer adjacent gap b of the outer strands, the gap a and the adjacent gap or space b as an independent Unity to be treated.

The wire ropes from FIGS. 6 and 8 not only reduce the contact pressure between the core rope 1 and the outer strands 2, but also the contact pressure between the individual outer Strands 2, making the wire rope overall in terms of its wear resistance, fatigue strength and its loss of wire rope breaking load by stranding and closing is improved will. These effects are particularly evident in the wire rope structure from Figure 8, in which the outer strands 2 through the bridge sections of the inner and outer Filling elements 3 and 3 'are completely separated. These wire ropes also lead to excellent results on the effect of trapping lubricating oil.

The wire rope construction of Figure 6 essentially leads to the same Results like the embodiment from FIG. 8 if inner and outer filling elements 3 and 3 'are arranged to be mutually exclusive in the radial direction touch. With the wire ropes from FIGS. 6 and 8, the effect is. of inclusion of the lubricating oil by touching each other with the adjacent outer filling elements 3 'reinforced by film sections that are circumferentially in such a Way that the outer circumferences of the outer strands 2 extend from the contacting ones Film sections are covered. While the reinforcement cores 4 in the inner and outer filling elements of these wire ropes are anchored; they can basically also only be embedded in the inner filling elements 3, with the exception of a special one Application or a special case where the increased effects of the Fill elements are desired.

The above wire ropes are also made by that the filler elements coincide with the outer strands at the time of closing can be laid in the same way as in the wire rope structure of FIG. It must it is not mentioned that the resulting wire ropes also have the special effects of the present invention, namely maintaining flexibility and tearing or detachment of the filling elements are avoided, similar to the wire rope construction from Figure 1.

In the method described above, in which a simultaneous filling element insert takes place and that for the manufacture of the wire rope for the present invention is applied, the Filling elements at the same time as the closing process inserted, so that in the manufacturing process there is no need for a separate filling element insertion stage and a high production efficiency of the rope manufacture is ensured will. The process also has advantages over the conventional coating method, as there is no preheating treatment of the rope before impregnation of the filler material, and no equipment such as an extruder is required power. The low investment costs in connection with the high productivity the rope production a significant cost reduction of the wire rope. Considering of these points, the simultaneous filler insert method appears to be the most advantageous and most suitable methods for the production of the wire rope according to the invention and thus as the only method that is suitable for actual application is imaginable. However, any other method can be used, provided that the filling elements can be placed in the same way.

The following tests show the fatigue strength in detail and other properties of the wire of the present invention.

Experiment 1 The following wire rope samples from IWRC 6 x Fi (25) 16 mm JIS Type 14 were subjected to a repeated bending test: (i) a DraI rope «us black or non-galvanized wire (black wire rope); (ii) one according to the invention Wire rope construction according to Figure 1 and (iii) a conventional wire rope, the spaces between and gaps completely and coherently impregnated with a thermoplastic resin and are filled out.

In the experiment, a pair of test rollers were placed between a drive roller and a tension roller. Samples (i) through (iii) were S-shaped through the Test rolls passed, with opposite ends of the specimen attached to the Drive and tensioning rollers were fixed. A horizontal tensile load was applied on the tensioner pulley during repeated bending tests under the following conditions exercised: rope diameter d - 16 mm; Test roller spacing or pitch diameter D - 256 mm; D / d ratio - 16; Test load - 1190 kg; nominal Breaking load of the test wire rope - 11900 kg; Safety factor - 10; Role structure - S shape.

The test results are shown in Table 1.

Table 1 Samples Number of Repeated Bends of the Beginning Wire break 10% Wire break (initial wire breaking) (end point of the attempt) (i) 8500 17000 (ii) 12500 26500 (iii) 13000 27500 Experiment 2 The following wire rope samples IWRC 6 x Fi (29) 44 mm was tested for flexibility, increased diameter and loss of wire rope breaking load or reduction by stranding and closing investigated: (i) a wire rope out black or non-galvanized wire (black wire rope); (ii) one according to the invention Wire rope construction according to Figure 1 and (iii) a conventional wire rope, the spaces between and gaps completely and continuously impregnated with a thermoplastic resin and are filled out. The test results are shown in Table 2.

Table 2 Samples Flexibility Rope Diameter Loss in Break Diameter Increase load (%) (%) (%) (i) 100 44.80 - O 18.1 -23.1 (ii) 95f100 45.46N45.58 + 1.47 # + 1.74 14.1 18.1 (iii) 70f75 46.26 ~ 46.38 + 3.26- + 3.53 14.5 # 19.0 The flexibility is enhanced by Expressed an index number based on 100% of the black or ungalvanised Rope (sample (i)), and the loss of wire break load due to stranding and closing will expressed as follows: loss of actual breaking load of the Wire rope total breaking load of each wire breaking load (%) The results from Experiments 1 and 2 show that the wire rope of the present invention with the fully impregnated wire rope in terms of the strength of the repeated bending process is quite comparable despite the fact that the sample tested had a structure according to Figure 1, in which the filling elements only in the inner spaces were inlaid; this wire rope surpassed the latter in terms of flexibility and the loss of wire rope breaking load as well as the increase in diameter or Increments.

From the above description it should be noted that the wire rope of the present invention the improved properties of the impregnated wire rope in terms of wear resistance, fatigue strength and loss on wire rope breaking load by stranding and closing without affecting the flexibility of the wire rope is adversely affected, while tearing and peeling of the filler material is prevented. It thus has extremely great practical utility.

It is clear that, taking the above teaching into account, numerous Modifications and changes within the scope of the present invention are possible. Accordingly, the invention can also be practiced in a different way than here specifically described.

Claims (1)

Wire rope Patent claims 1. Wire rope, characterized by a core rope (1), by a plurality of outer strands (2) running on the circumference of the core rope (1) are placed so that between the core rope (1) and the corresponding outer Strands (2) a plurality of spaces (a) is formed, and by a as coherent body formed flexible filling or insert element (3) with an embedded reinforcement core (4), each in one of the spaces (A) arranged between the core rope (1) and the corresponding outer strands (2) is. / independent 2. Wire rope, characterized by a core rope (1), by a A plurality of outer strands (2) which are laid on the circumference of the core rope (1) are that between them column (b) and between the core rope (1) and the corresponding outer strands (2) a plurality of spaces (a) are formed by a flexible filling or insert element designed as a cohesive body (3, 3 '), each independently in each of the spaces (a) between the core rope (1) and the outer strands (2) and in each of the gaps (b) between the individual outer strands (2) is arranged, and by a reinforcing core (4), the at least is embedded in the filling element (3) arranged in the intermediate spaces (a). 30 wire rope, characterized by a core rope (1), by a plurality of outer strands (2) which are laid on the circumference of the core rope (1) so that in between, adjacent gaps (b) extending radially outward and between the core rope (1) and the corresponding outer strands (2) a plurality of Interstices (a) are formed, and by a formed as a cohesive body flexible filling resp. Insert element (3, 3 ') in the spaces (a) between to the Core rope (1) and the corresponding outer strands (2) and in the radial outwardly extending adjacent columns (b) between the individual outer Strands (2) is arranged so that an intermediate space (a) and a radially outward extending adjacent gap (b) have a single independent unit, the filler element (3, 3 ') further comprising a reinforcing core (4) disposed therein embedded in at least one section arranged in the interspaces (a) is.