WO2011154236A1

WO2011154236A1 - Cable-guiding device for a cable winch

Info

Publication number: WO2011154236A1
Application number: PCT/EP2011/058230
Authority: WO
Inventors: Walter Schröder
Original assignee: Olko-Maschinentechnik Gmbh
Priority date: 2010-06-11
Filing date: 2011-05-20
Publication date: 2011-12-15
Also published as: ZA201207008B; EP2539271B1; CA2798576C; DE102010023400A1; CA2798576A1; RU2012147917A; RU2529583C2; EP2539271A1

Abstract

Cable-guiding device (11) for a cable winch having a cable drum (1), which can be rotated about an axis (9), for winding or unwinding a cable (4), wherein a guide element provided with a plurality of cable-guiding rollers (17a, b) can be moved parallel to the axis of the cable drum. This cable-guiding device is simple and robust in design, can be retrofitted to multi-layer cable winches, requires no adjustment work and nevertheless damps the vibrations in the cable. In the cable section situated in front of the cable drum, an additional mass is integrated in a play-free manner radially with respect to the cable in order to effectively suppress vibrations of the cable in the region of the natural frequency thereof. The integrated mass is formed by the mass of the floatingly guided guide element itself, with it being possible to change this mass, depending on the operating conditions, by means of additional weights which can be releaseably fastened to the guide element.

Description

Rope guiding device for a winch

The invention relates to a cable guide device for a winch with a rotatable about an axis cable drum for winding or unwinding of a rope, in which a provided with a plurality of cable guide rollers guide element is movable parallel to the axis of the cable drum.

Such cable guide devices are used in particular in drum conveyors in mining, in which a rope in a plurality of rope layers on a cable drum up or is unwound from this. When winding or unwinding of the rope, vibrations occur in the section of the cable located in front of the cable drum, which can complicate its guidance and impair the operational safety. The vibrations are triggered in particular by a winding system, are equipped with the cable drums for receiving several rope layers to fill each layer of rope with flush cable windings and clean the rope to the next rope layer

be reconciled. In known winding systems, the circumference of the cable drum is divided into two groove areas with parallel grooves, which are offset by half a pitch against each other. Between the two areas are the so-called crossing areas on which the rope is shifted by half a pitch in the axial direction of the cable drum to the next groove area.

The rising or running rope has a natural frequency depending on its own weight, tensile load and length. The jerky

Moving the rope when turning the rope drum in

Crossing area, the rope stimulates vibrations. If the stimulating frequency is close to the natural frequency of the rope, severe vibrations of the rope may occur which affect the safe operation of the drum conveyor. In particular, the rope of the on the scaffold of the

Drop shaft shaft pulley or Cause winding errors on the cable drum. In the case of extremely strong vibrations, facilities of the drum conveyor located near the cable can be destroyed by the beating rope.

To avoid such vibrations of the rope, cable guide devices for winches of drum conveyors are already known, in which a guide element is moved synchronously to the rotation angle of the cable drum over the winding width of the rope oscillating back and forth to

Vibrations in the front of the cable drum

Prevent rope section.

From DE 1 932 817 is such

Rope guiding device for winches of mining equipment known. To the vibrations in the up or

To attenuate expiring rope is a designed as a guide guide element for the rope at one

Control spindle hinged, wherein the control spindle forms part of a pivotable frame. The rope running between four horizontally arranged rollers and two vertical rollers is loaded by the weight of the guide carriage and the pivotable frame. As a result, a secure guidance of the rope and a proper winding of the same is to be ensured on the cable drum, while on the other hand, the winding process of the rope disturbing vibrations of the rope drum located in front of the cable section are partially damped. The known cable guide devices are complicated and expensive. The synchronous drive of the guide carriage via a flexible drive member, for example a chain, with the shaft, which also drives the cable drum, is expensive. A readjustment of the synchronization between the guide carriage and drive the cable drum is required when, after shortening the elongated rope, the transition of the rope of one in the other rope position with respect to the angle of rotation of the shaft and thus changed the cable drum.

Another cable guide device with synchronous drive of the carriage is known from DE 38 27 078 AI. The

Cable guide device comprises a plurality

Rope guide rollers comprehensive carriage, which is movable parallel to the axis of the cable drum. The carriage is driven by a threaded spindle with an associated threaded sleeve and held by guide rods. The drive of the carriage is controlled by a control member according to a drum axis adjusting bevel angle of the cable for tracking the carriage. Finally, DE 20 54 357 A discloses a

Cable guide device for a cable drive with a drum rotatable about an axis for winding and unwinding a rope, in which a provided with a plurality of cable guide rollers carriage is movable parallel to the axis of the cable drum. On the carriage are two by means of spring pressure against the wound on the rope drum rope contactable track rollers arranged one above the other and pivotable. The sensing rollers comprise a portion of the shell of the rope. The rope turns forming by the winding rope,

determine the sliding movement of the carriage, as the rope form-fitting encompassing touch rollers move the carriage in the direction of the axis of the drum; the

helical rope winding turns into a straight line

Displacement movement of the carriage translated using the tactile rollers.

Based on this prior art, the invention is based on the object, a cable guide device

to propose, which is simple and robust, can be retrofitted with multi-layer winches, no adjustment work requires and yet effectively damps the vibrations in the rope.

The solution to this problem is based inter alia on the

Thoughts, in the front of the rope drum

Rope section radially to the rope play-free coupled an additional mass to effectively prevent vibrations of the rope in the range of its natural frequency. In the

coupled mass is in particular the mass of the floating guided guide element itself, depending on the operating conditions by releasably connected to the

Guide element to be fixed additional weights can be changed. Specifically, the task becomes one

Rope guiding device of the type mentioned solved in that the cable guide rollers are arranged in the guide element such that the rope between the

Rope guide rollers at least in the direction of the axis of the cable drum runs free of play and the guide element is guided floating parallel to the axis of the cable drum, so that only the transmitted from the rope on the guide rollers forces cause movement of the guide element parallel to the axis of the cable drum. The play - free guidance of the rope between the rollers causes cable rashes directly on the mass of the

Guide element act. The extra mass of the

Guide element shifts the natural frequency of the rope so that no resonance can occur. The

Formation of vibrations in the rope is thereby effectively prevented, in particular by the jerky Moving the rope in the direction of the axis of the cable drum are caused by the crossing areas of Seilspulsystems. The floating guide of the guide element parallel to the axis of the cable drum waiving one with the

Cable drum synchronized drive for the guide element causes that exclusively from the rope to the

Guide rollers transmitted forces a movement of the

Guide element parallel to the axis of the cable drum over its winding width. In this consideration, it is assumed that the axis of the cable drum and the guide of the guide element in operation horizontally

are aligned and therefore act on the guide element no downgrade forces. The swimming led

Guide element is from the rope in the axial direction of the

Cable drum easily movable, so that a uniform winding or unwinding of the rope is guaranteed. The cable guide rollers are mounted in the correspondingly heavy guide element, which by the rope itself in

horizontal direction over the entire winding width of the

Cable drum is moved. A synchronization of the

Rope guide element with the rotation angle of the drive shaft of the cable drum is omitted, since the vibrations in the rope damping guide element due to the play-free leadership between the cable guide rollers is always there where the rope on the drum up or expires from this. A particularly effective play-free guidance of the rope

between the cable guide rollers in the direction of the axis of the cable drum is achieved in that the guide element at least three cable guide rollers with parallel

Roller axes welißt, wherein between two outer

Rope guide rollers offset in the cable direction

Roller axles another cable guide roller is arranged which clamps the rope between the two outer cable guide rollers. All roller axes are perpendicular to the axis of the cable drum, but skewed to this. The clamping of the rope between the two outer

Rope guide rollers and the further cable guide roller can be adapted to different operating conditions, in particular

different rope diameters are adapted when the distance between the roller axis of at least one of the two outer cable guide rollers and the roller axle of the other roller is adjustable. Preferably, the further roller is mounted on a pivotable swivel arm and therefore

opposite the two fixed outer rollers

adjustable.

The guide roller having the guide element is designed in particular as a roller housing with two spaced-apart walls, between which the

Roll axes of the cable guide rollers extend. The walls also serve as a warehouse. About the thickness of the walls of the roller housing, the mass can be determined, which is to be coupled into the rope without play.

The floating guide of the guide element parallel to the axis of the cable drum is effected in particular by means of a linear guide, which enables a translation of the guide element parallel to the axis of the cable drum at least over the winding width. A particularly robust and long-lasting design of a linear guide for mining operations is a rail guide for a carriage that is fixed to the guide element

connected is. The rail guide guides the carriage, also referred to as subframe, parallel to the axis of the cable drum at least over its winding width. To couple via the guide element under the given spatial conditions, a sufficient mass in the rope and for reasons of stability, the guide element is preferably made of heavy metal, in particular iron. The term "heavy metal" is not just different

Metals, but also their alloys with a density of more than 5 g / cm ³ . Of course, however, the guide element can also consist of other materials with a high density of more than 5 g / cm ³ in particular. If materials with lower density are used, which is basically possible, more space is required, which may not be available under certain circumstances.

Provided that the theoretical calculations of the natural frequency of the cable rope winch of the occurring in practice

Natural frequency may differ, the mass of the

By vibration damper acting guide element

at least one releasably attachable to the guide element additional weight can be changed. Such changes are important even if the operating conditions of the

Change winch, for example, by a higher trailer load on the rope or a heavier rope.

To an always vertical course of lying in front of the cable drum rope section to the roller axes of the

To allow cable guide rollers of a multi-layer cable winding, the length of the cable guide rollers in the direction of the roller axes is greater than or equal to the difference of the radius of the cable winding wound on the cable drum and unwound rope. The alignment of the axes of

Axially parallel cable guide rollers is always perpendicular to the axis of the cable drum and the longitudinal axis of the running of the drum rope. The invention will be explained in more detail with reference to the figures. Show it: Figure la is a front view of a cable drum one

Winch, Figure lb is a side view of the cable drum

aligned cable guide roller

Figure lc is a section along the line X-X of Figure la, Figure 2 is a section through an inventive

Rope guidance device,

3 shows a section along the line X-X of Figure 2 in

Viewing direction A,

Figure 4 is a sectional side view of

Rope guiding device according to FIG. 2,

Figure 5 is a view corresponding to Figure 3 but with an adjustable cable guide roller.

Figure 1 a shows a cable drum (1) of a drum-carrier, which is used in mining to drive the conveyor baskets or conveying vessels. The illustrated embodiment relates to a cable drum (1) with a cylindrical drum core (2) which is bounded laterally by flanges (3). A cable (4) connected to the conveyor basket or conveying vessel is unwound from the drum core (2) during the runoff of the cable and wound up in several cable layers when the cable rests.

The drum core (2) is equipped with a winding system to wind the cable (4) in several rope layers with mutually flush cable windings over the entire winding width (6) and clean over to the next layer (5a - 5d)). By the winding system, the circumference of the drum core (2) in two Divided areas (7a, 7b) with parallel grooves, which are offset by half a pitch against each other. Between the areas (7a, 7b) with parallel grooves are the so-called crossing areas (8a, 8b) on which the cable (4) by half a pitch in the direction of the axis (9) of

Cable drum (1) to the next groove area (7a or 7b) is moved while the cable drum (1) rotates. The jerky shifting of the rope (4) when turning the

Cable drum (1) from one groove area (7a or 7b) in the next, stimulates vibrations in the cable section of the rope located in front of the cable drum (1). If the stimulating frequency lies in the range of the natural frequency of the rope (4), violent rashes of the rope (4) can occur which cause the rope to vibrate

Reliable operation of the drum conveyor system

can affect.

The cable guide device (11) according to the invention serves the purpose of preventing cable rashes due to vibration excitations. The schematically shown in Figure 2

Rope guiding device (11) shows the rope (4), which at a cable outlet angle of about 45 degrees to the horizontal of the cable drum (1) of Figure 1 to a not

shown pulley is running. The rope outlet angle to the horizontal, however, can also have other angles between -90 to + 90 degrees.

The cable guide device (11) comprises a guide element of a roller housing (12) and one below the

Roller housing (12) arranged guide carriage (13), also referred to as subframe, is formed. The roller housing (12) is fastened to the surface (14) of the guide carriage (13) inclined in accordance with the cable outlet angle α of approximately 45 degrees, in particular welded or screwed. The roller housing (12) comprises two spaced-apart, parallel walls (15a, 15b) between which three roller axes (16 ac) for receiving two outer Cable guide rollers (17a, b) and arranged between the two outer cable guide rollers middle

Rope guide roller (17c) extend. From Figure 3 it can be seen that all roll axes (16 a-c) parallel to each other. The roller axes (16a, b) of the two outer cable guide rollers (17a, b) are in

Cable direction (18) of the rope (4) offset from one another

arranged. On the opposite side of the cable (4) is axially parallel to the roller axes (16a, 16b) of the outer cable guide rollers (17a, 17b), the roller axle (16 c) of the middle cable guide roller (17 c), the cable (4) between the both outer cable guide rollers (17a, 17b) slightly jammed and thus clamped. By doing

Clamping area, the rope (4) through the middle

Rope guide roller (17 c) slightly out of the cable direction (18) in the direction of the two outer cable guide rollers (17 a, b) deflected. As a result, the rope (4) without play between the cable guide rollers (17 a-c) out. Rashes of the rope (4) in the direction of the axis (9) of the cable drum (1) are effectively prevented by the play-free cable guide. In

Direction of the roller axes (16 a-c), the rope (4) between the rope guide rollers is hindered in its movement due to the jamming, so that possibly occurring in this direction cable rashes by the guide element

Roller housing (12) and carriage (13) are effectively damped. Any cable rashes act directly on the

Total mass of roller housing (12) and carriage (13), which consist in particular of iron or iron alloys.

The guide carriage (13) carrying the roller housing (12) is guided in a floating manner by a rail guide (19) parallel to the axis (9) of the cable drum (1). To reduce the friction of the carriage (13) in the rail guide (19) is mounted on four rollers (21). The rail guide (19) is secured against displacement. Floating leadership means that the guide carriage (13) and the roller housing (12) comprehensive guide element waiving its own drive exclusively by the between the

Rope guide rollers (17 a-c) running free running rope (4) along the rail guide over the winding width (6) is moved.

Any cable rashes of the rope (4) therefore act directly on the total mass of the guide element, wherein the additional mass of the guide element shifts the natural frequency of the rope so that resonance can no longer occur. The guide element of the cable guide device is due to the lack of synchronization with the rotation angle of the cable drum (1) always there where the rope straight on the

Cable drum runs on or from her.

Figure 5 shows an embodiment of the guide element, in which in the roller housing (12) the middle cable guide roller (17 c) is adjustable to the cable guide device to different operating conditions, in particular

Rope diameter to be able to adjust. The middle

Rope guide roller (17 c) is not for this purpose

directly in the two opposite walls (15a, 15b), but in a pivotable about an axis (22) holding frame (23). The adjustment takes place by means of a set screw (24), the holding frame (23) in

Direction of the rope (4) and thus the middle

Rope guide roller (17 c) in the direction of the two outer

Rope guide rollers (17a, 17b) moves and thus clamps the rope. The adjusting screw (24) serves as an abutment

Internal thread in a web (25) extending between the walls (15a, 15b) of the roller housing (12).

The length (25) of the cable guide rollers (17 a-c) in the direction of the roller axes (16 a-c) is preferably equal to

Difference of the radius of the cable reel when completely wound on the cable drum (1) and completely unwound Rope (4), as can be seen in particular from the figures lb and lc.

A significant advantage of the invention

Rope guiding device (11) is that a

Complex synchronous coupling of the guide element to

Drive shaft of the cable drum (1) is unnecessary. The

Rope guiding device (11) can therefore be at every

Retrofit drum carrier.

The floating support of the guide element prevents winding errors even after any shortening of the rope, since the carriage with the cable guide housing automatically follows the movement of the running rope in the axial direction of the drum over the winding width (9).

The structure of the cable guide device is simple, robust and therefore durable. The technique of the cable guide device is easily manageable for the operator of the drum-carrier. By appropriate adaptation of the

Guide carriage, in particular the inclination angle of the surface (14), the guide element can be easily adapted to different rope drainage angle.

LIST OF REFERENCE NUMBERS

No. Designation

1 cable drum

2 drum core

3 flanges

4 rope

5a-d layers

6 winding width

7a-b area with parallel

grooves

8a-b crossing areas

9 axis cable drum

10 -

11 Be the guide

12 roller housing

13 carriages

14 surface

carriages

15a-b walls

16a-c roller axles

17a-b outer

Cable guide rollers

17c middle

Roller fairlead

18 rope direction

19 rail guide

20 -

21 rolls

22 pivot axis

23 holding frame

24 set screw

25 length

26 footbridge

27

Claims

Rope guiding device for a cable winch with a rope drum rotatable about an axis for winding or unwinding a rope, in which a guide element provided with a plurality of cable guide rollers is movable parallel to the axis of the cable drum, characterized in that the cable guide rollers (17 a - c) in the

Guide element (12,13) are arranged such that the cable (4) between the cable guide rollers (17 a - c) at least in the direction of the axis of the cable drum runs free of play and the guide element (12, 13) parallel to the axis (9) Cable drum (1) is floating, so that only those of the rope (4) on the

Cable guide rollers (17 a - c) forces a movement of the guide element (12, 13) parallel to the axis (9) of the cable drum (1) cause.

Cable guide device according to claim 1, characterized

in that the guide element (12, 13) has at least three cable guide rollers (17 a - c)

parallel roller axes (16 a - c), wherein between two outer cable guide rollers (17 a, b) with in the cable direction (18) offset roller axes (16 a, b), a further cable guide roller (17 c) is arranged, the cable (4 ) between the two outer cable guide rollers (17 a, b) clamped.

Cable guide device according to claim 2, characterized

characterized in that the distance between the roller axis (16 a, b) at least one of the two outer

Rope guide rollers (17 a, b) and the roller axis (16 c) of the other roller (17 c) is adjustable. Cable guide device according to one of Claims 1 to 3, characterized in that the guide element (12, 13) has a roller housing (12) with two spaced-apart walls (15a, b) between which the roller axes (16a-c ) of the cable guide rollers (17 a - c).

Cable guide device according to one of claims 1 to 4, characterized in that the guide element (12, 13) by means of a linear guide (19) parallel to the axis (9) of the cable drum (1) is guided floating.

Rope guiding device according to one of claims 1 to 5, characterized in that the guide element (12, 13) has a guide carriage (13), which of a

Rail guide (19) parallel to the axis (9) of

Cable drum (1) is floating.

Cable guide device according to one of claims 1 to 6, characterized in that the guide element (12, 13) consists of heavy metal.

Cable guide device according to one of claims 1 to 7, characterized in that on the guide element (12, 13) at least one additional weight is releasably secured.

Cable guide device according to one of claims 1 to 8, characterized in that the length (25) of the

Rope guide rollers (17 a - c) in the direction of

Roller axes (16 a - c) greater than or equal to the difference of the radius of the cable reel (5 a - c) when on

Cable drum (1) wound and unwound rope (4). 10. winch with a rotatable about an axis cable drum for winding or unwinding of a rope, characterized

characterized in that the winch a

Rope guiding device according to one or more of

Claims 1 to 9.