CN111254524A

CN111254524A - Cotton grabbing roller

Info

Publication number: CN111254524A
Application number: CN201811466848.8A
Authority: CN
Inventors: 房坚
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2020-06-09
Also published as: EP3663442A1

Abstract

The invention relates to a cotton-plucking roller (1) for mechanically unraveling fiber bales, comprising a roller axis (2) and spacer elements (3) arranged along the roller axis (2), wherein the spacer elements (3) each have two opposite end faces (4, 5) arranged at an angle of inclination α relative to the roller axis (2), a circular toothed disk (6) is inserted between the two spacer elements (3), wherein the toothed disk (6) is formed in each case by two half disks (7, 8) and is provided on its outer periphery with teeth (9), wherein in each case two adjacent spacer elements (3) are bolted to one another, wherein a bolt (10) passes through the toothed disk (6) arranged between the spacer elements (3).

Description

Cotton grabbing roller

Technical Field

The invention relates to a nipper roll for mechanically unraveling fibre bales (Faserallen).

Background

The plucking roller is used in a so-called bale-breaker machine or bale-breaker for breaking apart fibers or fiber flocks from a compressed bale of fibers. To this end, one or more nipper rollers are moved over the fibre bale. From the prior art, bale openers are also known in which the nipper rollers are moved past a stationary bale.

The teeth of the nipper roller engage in the fiber bale and, as a result of the rotation of the nipper roller, the fibers or fiber flocks are torn or torn out of the fiber bale. At the beginning of the moving line in the preparation area of the textile mill (cleaning plant), the bale splitter is used to process textile products, such as cotton or synthetic fibers or mixtures thereof, and has a decisive influence on the continuity of the process within the preparation area of the textile mill. In the bale splitter, a fibrous product is provided in a bale-loose manner by splitting fiber floes from a bale, and the fibrous product is transferred to a pneumatic conveying system. The pneumatic conveying system carries the fiber floe through a line to a subsequent picker.

A grid (rot) is usually arranged between the nipper roll and the fibre bale. The teeth of the cotton grabbing roller penetrate through the grid plate. The grid serves here as a holding element for the fiber package. The grid elements located on the surface of the fiber bale prevent the tearing of excessively large or uneven fiber flocks from the fiber bale by the teeth of the plucking roller.

Various embodiments of a nipper roll are known from the prior art. For example, document EP 0058781 discloses a nipper roll in which a toothed disc is fixed to a semicircular housing. Two of the half shells each comprise a shaft of the cotton-picking roller and are fixed to each other in such a way that a press fit is obtained between the half shells and the shafts.

The disadvantage of the known design of the nipper rollers is that the half shells are complex and can be released by the press-fit toothed disk fastening, which can also be released during operation.

Document EP 2836630 a1 discloses another embodiment of a nipper roll. The toothed disk is designed in an annular manner and has a central recess which is shaped in an oval manner. The toothed disk is pushed onto the shaft and is connected to the shaft in a rotationally fixed manner. In this configuration, it is disadvantageous that the individual toothed disks cannot be replaced. It is always the case that the teeth break or wear more strongly in certain regions than in others.

Disclosure of Invention

The object of the invention is to provide a structurally simple cotton-picking roller which allows simple replacement of a single toothed disk.

This object is achieved by a nipper roll having the features of the independent claim.

In order to achieve this object, a novel nipper roll is proposed, which has a roll axis and spacer elements arranged along the roll axis, wherein the spacer elements each have two opposite end faces arranged at an angle of inclination α relative to the roll axis, and wherein the nipper roll has a circular toothed disk which is inserted between the two spacer elements, wherein the toothed disks are each formed by two half-disks and are provided with teeth on their outer peripheries.

For simple assembly, the spacer element can be pushed onto the auxiliary tube. The toothed plates, i.e. the half plates, are each inserted between the spacer elements when the adjacent spacer elements are bolted together. By bolting the opposite spacer elements, the toothed disc, i.e. the half disc, is clamped between the spacer elements. The positioning takes place here by means of a through opening arranged in the toothed disk, through which the bolt of the spacer element passes.

The embodiment with the toothed disk consisting of two half-disks has the advantage that the entire cotton-picking roller does not have to be removed when the toothed disk is replaced and thus loses its rotational symmetry. Only the bolts associated with a single half-disc may be loosened. After the replacement of this half disc, the associated spacer elements are again interconnected and the second half disc is replaced. With this embodiment of the nipper roller, it is also not necessary to remove the nipper roller from the machine. And a single fluted disc is replaced in the installation state of the cotton grabbing roller.

In a preferred embodiment, the toothed disks are arranged so as to be rotated radially by a defined angle β in the sequence thereof in the axial direction, the individual toothed disks arranged one behind the other being identical in their structure, however, in order to achieve better frictional properties for the cotton-grasping roller, the toothed disks are diverse in their radial arrangement.

Advantageously, the end faces of the spacer elements are configured as flanges and passage holes are provided in the flanges for bolting the opposite spacer elements to each other, wherein the passage holes in the two flanges of the spacer elements are arranged on hole center circles arranged concentrically about the roller axis and offset from each other by an angle β.

Advantageously, since the two end faces of the spacer elements are arranged at an oblique angle α with respect to the roller axis and the two end faces of the spacer elements are arranged to twist at an angle β with respect to each other along said roller axis, i.e. when two adjacent spacer elements are in close fit, the second spacer element is twisted at an angle β with respect to the first spacer element along said roller axis, said arrangement of the end faces of the spacer elements has the advantage that not only are all toothed discs identical, but all spacer elements can also be constructed in the same shape.

In an alternative embodiment, the end faces of the spacer elements are configured as flanges and through-holes for bolting the opposing spacer elements to one another are provided in the flanges, wherein the through-holes in the two flanges of the spacer elements are arranged on hole center circles arranged concentrically about the roller axis and, viewed in the direction of the roller axis, are arranged one above the other, and the toothed disk has slot-shaped passage openings for the connection bolts of the spacer elements to pass through. Through the slotted passage openings in the toothed disks for the bolts of the spacer elements, the opposite toothed disk can likewise be inserted between the spacer elements by radial screwing.

Advantageously, end elements are provided on both ends of the cotton-catching roller, which end elements have a first end face arranged parallel to the inclined end faces of the opposite spacer elements and a second end face arranged in a plane perpendicular to the roller axis. Preferably, the end element is provided with a projection, which engages into the spacer element. This achieves an exactly matched positioning of the end elements and a rotationally symmetrical arrangement of the end elements relative to the spacer element. By providing a plane perpendicular to the roll axis as the end of the nipper roll, a simple support element can be fixed to the end element. It is also advantageous here if the supporting element engages into the end element by means of a projection. The bearing elements have shaft ends, with which the cotton-picking rolls are rotatably held in the respective bearing.

Preferably, the end element and the bearing element are embodied in one piece, so that the further fixing does not affect the rotational symmetry about the roller axis due to tolerances of the end element and the bearing element.

By means of this construction, a preferred construction of the nipper roll is obtained, in which the nipper roll comprises bolted spacer elements, end elements, toothed discs held between the spacer elements and between the end elements and the spacer elements, and bearing elements mounted on the respective end elements. The actual shaft can be omitted here. For simple assembly, the individual components are pushed onto the auxiliary tube. However, after the spacer and end members are assembled with the toothed disc, the auxiliary tube is removed again. The spacer element is shaped in such a way that a self-supporting structure is obtained. The individual spacer and end elements can be produced as castings or also as lathes. Aluminum or aluminum alloys are preferred over steel embodiments for weight savings.

In an alternative embodiment, the spacer element and the end element are arranged on the shaft. In this arrangement, the use of support elements is dispensed with. In addition, however, a solution in which the end element is axially fixed in the direction of the roller axis must be provided. Depending on the embodiment of the shaft used, the spacer element may be constructed to be fragile, as a single element may be supported on the shaft.

In a preferred embodiment, the toothed disks have an inclination of an inclination angle α of 5 to 20 degrees relative to the roller axis, measured relative to a plane perpendicular to the longitudinal direction of the roller axis, the inclination angle α being measurable here in one or the other direction, the size of the inclination angle α being determined by the shaping of the end faces of the spacer elements, the spacer elements of the cotton-gripping roller preferably being produced with the same inclination, i.e. the same inclination angle α, it being conceivable, however, to vary the inclination between the individual spacer elements or regions of the cotton-gripping roller, the cotton-gripping width of the individual toothed disks being determined again by the inclination of the toothed disks, which influences the structural form of the toothed disks, i.e. the distance between the individual grid elements between which the teeth of the toothed disks pass, if the toothed disks of the cotton-gripping roller are fixed on the shaft at different inclination angles α, correspondingly matching the grid used, it being particularly preferred that all the toothed disks of the cotton-gripping roller are arranged with the same inclination angle α of 9 degrees.

The radial rotation between two successive toothed disks is preferably set at an angle β of 6 to 36 degrees, whereby, after a certain number of toothed disks, a complete revolution is obtained, for example, the tenth toothed disk is arranged identically to the first toothed disk when rotating an angle β of 36 degrees, the angle β of rotation is selected depending on the number of toothed disks on the entire cotton-gripping roller, so that a large number of spirals is obtained, it is particularly preferred that the individual toothed disks are rotated with respect to one another by an angle β, the angle β corresponding to one n-th of an integer multiple of 360 ° or 360 °, where n denotes the number of toothed disks on the cotton-gripping roller, whereby the dynamic unbalance generated by the inclination of the toothed disks is balanced.

Advantageously, the toothed disks each comprise four to twelve teeth, which are distributed uniformly over the periphery of the toothed disk. The teeth are arranged on the outer periphery of the toothed disc. The outer periphery of the toothed disk is configured in a circular shape. In this way, a rotationally symmetrical tooth arrangement is achieved. Preferably, the toothed disc has six teeth. These teeth are preferably subjected to a heat treatment on their outer surface, in order to impart a determined resistance to wear to them. As the heat treatment, quenching and tempering are used. However, other methods for improving wear resistance are also conceivable instead of heat treatment, for example coating. In particular, sufficient wear resistance is also achieved by a corresponding selection of the material for the toothed disk.

Preferably, the teeth have an outer profile that enables the nipper roll to work in both directions. The nipper roller can thereby be moved in both directions onto the fiber clew and also the fiber package can be opened in both directions.

Furthermore, a toothed disc for use in a nipper roll according to the above description is claimed.

Drawings

The invention is explained in detail below on the basis of exemplary embodiments and by means of the figures.

Figure 1 shows a schematic perspective view of a plucking roller,

figure 2 shows a schematic view of a partial side view of a plucking roller,

figure 3 shows a schematic view of the viewing angle in the direction X of figure 2,

fig. 4 shows a schematic cross-sectional view of one end of the nipper roll.

Detailed Description

Fig. 1 shows a nipper roll 1 in a schematic perspective view. The plucking roller 1 comprises a row of spacer elements 3 concentrically arranged side by side. Between each two spacer elements 3 a toothed disk 6 is inserted. The toothed disk 6 has a plurality of teeth 9 on its periphery. End elements 12 are mounted on the respective ends of the plucking roller 1. The end elements 12 each have a bearing element 15.

Fig. 2 schematically shows a partial side view of a cotton-picking roller 1 with a roller axis 2, on the roller axis 2, two opposing spacer elements 3 are shown concentrically, the spacer elements 3 each having a first end face 4 and a second end face 5, wherein the end faces 4 and 5 are arranged at an oblique angle α relative to a plane perpendicular to the roller axis 2, a toothed disk 6 is inserted between the spacer elements 3, the toothed disk 6 being clamped in this case between the first end face 4 of the first spacer element 3 and the second end face 5 of the second opposing spacer element 3, the opposing spacer elements 3 being tensioned against one another by means of bolts 10 and thus retaining the centrally located toothed disk 6 in its position.

Also, advantageously, said end faces 4 and 5 are arranged at a mutual twist angle β along said roller axis 2, for example, so that when the end faces 4 and 5 of two opposite spacer elements 3 are in close fit with each other, one of them must be twisted at an angle β along said roller axis 2 with respect to the other spacer element, which has the advantage that not only are all toothed discs identical, but all spacer elements can also be configured in the same shape.

Fig. 3 shows a view in the direction X of fig. 2 in a schematic view.

Spacer element 3 arranged on axis 2 carries toothed disc 6 formed by a first half-disc 7 and a second half-disc 8, toothed disc 6, i.e. half-discs 7 and 8, are provided with teeth 9 on their outer peripheries, in the illustrated embodiment, each of half-discs 7 and 8 has three teeth 9, respectively, half-discs 7 and 8 are fixed on spacer element 3 by means of bolts 10, bolts 10 are arranged on a hole center circle 11, wherein bolts 10 are arranged with their longitudinal axes parallel to roller axis 2, half-discs 7 and 8 are arranged in their sequence in the direction of roller axis 2 with a radial rotation of angle β, since all half-discs 7 and 8 are identically configured, from the rotation of angle β, an angle β is likewise obtained for the misalignment of teeth 9 of successive toothed discs 6, combined with angle of inclination α and angle of rotation β, a varying inclination of toothed disc 6 visually relative to axis 2 is obtained, the reason that by rotation of two successive toothed discs 6, the plane on which inclined toothed disc 6 lies is likewise rotated, that the working area of inclined toothed disc 6 is provided between working elements, in the working gap area between working discs 6, and working elements, which working rolls 6 pass along their longitudinal axis, and working gap elements, and working rolls, which working elements are provided in the working elements, and which working rolls.

Fig. 4 shows the end of the picker roller 1 in a schematic sectional view, in the example shown, the spacer element 3 with the first end face 4 and the second end face 5 is located on a shaft 17, the shaft 17 being shown as a hollow shaft, in an alternative embodiment the shaft 17 can be removed after assembly of the individual elements, the end faces 4 and 5 being arranged at an oblique angle α relative to a plane perpendicular to the roller axis 2, opposite the first end face 4 of the spacer element 3, an end element 12 with a first end face 13 and a second end face 14 is arranged on the shaft 17, a toothed disc 6 is provided between the first end face 13 of the end element 12 and the first end face 4 of the spacer element 3, the end element 12 and the spacer element 3 being tensioned together by means of a bolt 10, here the bolt 10 passing through the toothed disc 6, whereby the toothed disc 6 is jammed between the end element 12 and the spacer element 3.

The support element 15 is fixed to the second end face 14 of the end element 12 by means of a fixing element 16. The support element 15 serves to rotatably receive the plucking roller 1 in a corresponding device of the bale opener. The shaft 17 can also be used, for example, as an assembly aid which acts only on the toothed disk 6 and the spacer element 3 in line and is removed again before the mounting of the support element 15. Here, a self-supporting structure of the nipper roll 1 is obtained, which comprises the spacer element 3, the toothed disc 6, the end element 12 and the support element 15.

List of reference numerals

1 plucking roller

2 roll axis

3 spacer element

4 first end face of spacer element

5 second end face of spacer element

6 fluted disc

7 first half disc

8 second half disc

9 teeth

10 bolt

11 hole center circle

12 end element

13 first end face of end element

14 second end face of end member

15 support element

16 fixing element

17 shaft 13

α inclination angle

β angle of rotation.

Claims

1. A plucking roller (1) for mechanically unraveling fiber bales, having a roller axis (2) and spacer elements (3) arranged along the roller axis (2), wherein the spacer elements (3) each have two opposite end faces (4, 5) arranged at an oblique angle (α) relative to the roller axis (2), and wherein the plucking roller (1) has a circular toothed disk (6) which is inserted between the two spacer elements (3), wherein the toothed disk (6) is formed by two half-disks (7, 8) and is provided with teeth (9) on its outer periphery, characterized in that two adjacent spacer elements (3) are each bolted to one another, wherein the bolts (10) pass through the toothed disk (6) arranged between the spacer elements (3).

2. Gripper roller (1) according to claim 1, characterized in that the toothed discs (6) are arranged to rotate in their sequence in the direction of the roller axis (2) in radial direction by a determined angle β with respect to each other.

3. The plucking roller (1) of claim 2, characterized in that the end faces (4, 5) of the spacer elements (3) are configured as flanges and through holes or internal threads for bolting opposing spacer elements (3) to each other are provided in the flanges, wherein the through holes or internal threads in both flanges of the spacer elements (3) are arranged on hole center circles (11) arranged concentrically around the roller axis (2) and are offset from each other by an angle β on the hole center circles (11).

4. A plucker roller (1) according to any of claims 1-3, characterized in that the end faces (4) and (5) of the spacer elements (3) are arranged at a twist angle β to each other along the roller axis (2).

5. The plucking roller (1) according to claim 2, characterized in that the end faces (4, 5) of the spacer elements (3) are configured as flanges and through holes or internal threads for bolting the opposing spacer elements (3) to each other are provided in the flanges, wherein the through holes or internal threads in both flanges of the spacer elements (3) are arranged on a hole center circle (11) arranged concentrically about the roller axis (2) and are arranged overlapping viewed in the direction of the roller axis (2), and the toothed disc has a slot-shaped through opening for passing through a connecting bolt (10) of the spacer element (3).

6. A nipper roller (1) according to any one of the preceding claims, characterized in that end elements (12) are provided on both ends of the nipper roller (1), said end elements (12) having a first end face (13) arranged parallel to the inclined end faces (4, 5) of the opposite spacing element (3) and a second end face (14) arranged in a plane perpendicular to the roller axis (2).

7. Gripper roller (1) according to any one of the preceding claims, characterized in that the toothed disc (6) has an inclination of an inclination angle α of 5 to 20 degrees with respect to the roller axis (2).

8. Gripper roller (1) according to any one of claims 2 to 7, characterized in that the radial rotation between two consecutive toothed discs (6) is arranged at an angle β of 6 to 36 degrees.

9. Gripper roller (1) according to one of the claims 2 to 8, characterized in that the angle β of the radial rotation between two consecutive toothed discs (6) corresponds to 360 ° or one nth of an integer multiple of 360 °, wherein n denotes the number of toothed discs (6) on the gripper roller (1).

10. Gripper roller (1) according to one of the preceding claims, characterized in that the toothed disc (6) comprises four to twelve teeth (9) each, which are evenly distributed over the circumference of the toothed disc (6).

11. A plucking roller (1) according to any of the preceding claims, characterized in that the teeth (9) are subjected to a heat treatment on their outer surface.

12. A plucker roller (1) according to any of the preceding claims, characterized in that the teeth (9) have an outer shape enabling the work of unraveling the fiber package in both rotational directions by the plucker roller (1).

13. Gripper roller (1) according to one of the claims 6 to 12, characterized in that the gripper roller (1) comprises spacer elements (3) bolted to each other, end elements (12), a toothed disc (6) held between the spacer elements (3) and between the end elements (12) and the spacer elements (3), and support elements (15) mounted on the respective end elements (12) by means of fixing elements (16).

14. Gripper roller (1) according to claim 13, characterized in that the respective end element (12) and the support element (15) are integral.

15. A plucker roller (1) according to any of claims 6 to 12, characterized in that the spacer elements (3) and the end elements (12) are arranged on a shaft (17).

16. Toothed disc (6) for use in a plucking roller (1) according to any one of claims 1 to 15.