Rotor for a disintegration device

Abstract

A rotor for a device for disintegrating feed material, comprising a drive shaft, a plurality of rotor disks mounted on the drive shaft, and disintegration tools arranged in the region of the outer circumference of the rotor disks. A holding flange is provided for each rotor disk for connecting the rotor disk to the drive shaft, wherein the holding flange is permanently connected to the drive shaft and detachably connected to the rotor disk. Devices for disintegrating feed material, in particular impact hammer mills, may thus be operated with a rotor, in which the risk of a shaking out and a lateral wandering of the rotor disks is largely eliminated.

Claims

1. A rotor for a device for disintegrating feedstock, comprising a drive shaft, a plurality of rotor disks which sit on the drive shaft and disintegration tools which are arranged in the region of the outer circumference of the rotor disks, wherein at least one retaining flange is provided for each rotor disk of the plurality of rotor disks for connecting the rotor disk to the drive shaft, wherein the at least one retaining flange is connected non-detachably to the drive shaft and is connected detachably to the rotor disk, wherein precisely one retaining flange is provided for each rotor disk of the plurality of rotor disks, wherein the retaining flange is realized in a circular manner about the drive shaft, wherein each rotor disk or the plurality of rotor disks rests with fit by way of its radial inner side, which is provided by a hub bore, on the radial outer side of the corresponding retaining flange, wherein each rotor disk of the plurality of rotor disks and the corresponding retaining flange are connected together in a play-free manner to at least one connecting element by means of a respective screw connection, wherein each retaining flange comprises open recesses which are distributed over the outer circumference, wherein every two adjacent flange recesses leave between them a flange web, wherein the rotor disk, which is assigned to the respective retaining flange, comprises open disk recesses and disk webs, which are distributed over an inner circumference of the rotor disk and correspond to the flange recesses and flange webs, wherein with the rotor in the assembled state, the radial sides of the flange webs and of the corresponding disk webs rest one on top of another as centering surfaces with fit, and wherein the extents of the flange recesses provided along the circumference are dimensioned such that in at least one position of the rotor disk, each flange recess has situated opposite thereto a disk web with a smaller extent provided along the circumference.

2. The rotor as claimed in claim 1, wherein the retaining flanges are connected to the drive shaft by means of a weld connection.

3. The rotor as claimed in claim 1, wherein the rotor disks are congruent to one another, the retaining flanges are congruent to one another, the flange recesses are distributed uniformly on the circumference of every retaining flange and are congruent to one another, the disk recesses are congruent to one another, and the extent of the flange recess provided along the outer circumference is greater than the extent of the flange web provided along the outer circumference.

4. The rotor as claimed in claim 1, wherein hammers are provided as disintegration tools, wherein the hammers are pivotably arranged on axial rods which penetrate the rotor disks.

5. A device for disintegrating feedstock comprising a rotor as claimed in claim 1.

6. The device for disintegration as claimed in claim 5, wherein the disintegration tools of the rotor are hammers, and the rotor has assigned thereto an impact hammer mill stator.

7. The rotor as claimed in claim 3, wherein the extent of the flange recess provided along the outer circumference is greater, by an extent of approximately 0.5% to 10%, than the extent of the flange web provided along the outer circumference.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in more detail by way of the following figures, in which:

(2) FIG. 1 shows a rotor according to the invention for a device for disintegrating feedstock,

(3) FIG. 2 shows a longitudinal sectional representation of the rotor with screw-connected rotor disks,

(4) FIG. 3 shows a drive shaft with welded retaining flanges without rotor disks,

(5) FIG. 4 shows a cross section through a rotor disk on a retaining flange,

(6) FIG. 5 shows a cross section through a rotor disk in the assembly position with respect to the retaining flange, and

(7) FIG. 6 shows a cross section through a rotor disk in the assembled position with respect to the retaining flange.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(8) FIG. 1 shows a rotor 1 according to the invention for a device for disintegrating feedstock, for instance for an impact hammer mill used in the production of cement. The disintegration tools are not shown. However, it is possible to see axial holes 3, which are arranged in the outer region of the rotor disks 2 and are provided for the axial rods 14 (FIG. 2) on which pivotable disintegration tools 16, in particular hammers, are arranged in the region between the rotor disks 2. When the rotor 1 is rotated, the hammers 16 pivot following the centrifugal force into a position directed radially outward, in which they project beyond the outer disk edge and act in a disintegrating manner on particles of the feedstock. The rotor disks 2 are arranged on a drive shaft 4. Each rotor disk 2, in this case, is arranged on a circular ring-shaped retaining flange 5. The rotor disk 2, in this case, comprises a circular hub bore 18 for the connection to the retaining flange 5.

(9) FIG. 3 shows a schematic representation of the retaining flange 5 on the drive shaft 4. According to the invention, the retaining flanges 5 are connected non-detachably to the drive shaft 4 as a result of welding.

(10) In FIG. 2, in a longitudinal section, which includes the rotational axis of the drive shaft 4, through the rotor 1 from FIG. 1, it is possible to see, in particular, the fixed, but detachable connection between the rotor disks 2 and 5 the assigned retaining flanges 5. In the region of the mating surfaces of rotor disk 2 and retaining flange 5, which lie one on top of another, a connecting element 6, which is realized as a connecting plate, is arranged, in this case, on each of the sides. Both rotor disk 2 and the associated retaining flange 5 are screw-connected to the connecting elements 6 by means of screws 7 and nuts 8. A play-free connection according to the invention is consequently produced between rotor disk 2 and retaining flange 5, by means of which play-free connection the forces and torques are transmitted and with which, in operation, even with the rotor 1 under beating stress, the rotor disks 2 do not deflect and no lateral creeping of the rotor disks 2 along the drive shaft 4 can occur. As shown in FIG. 1, the connecting elements 6, in the exemplary embodiment shown, are provided as circular ring disks which are realized in two parts for simple assembly.

(11) FIG. 4 shows a cross sectional representation of a rotor disk 2 which is connected to the drive shaft 4 by means of a retaining flange 5. Arrangements according to the invention for problem-free assembly of the rotor disks 2 into the operating position are shown in FIGS. 5 and 6, which are limited to the inner region, with the respective detail enlargements of regions X and Y. The retaining flange 5, in this case, comprises along its outer circumference uniformly distributed flange recesses 9 and flange webs 10 between every two adjacent flange recesses 9. Corresponding to this, the rotor disk 2 also comprises along its inner circumference correspondingly uniformly distributed disk recesses 11 and disk webs 12. The recesses 9, 11, in this case, with regard to their extent along the circumference, are slightly larger than the webs 10, 12 such that in the position of rotor disk 2 and retaining flange 5 with respect to one another, as shown in FIG. 5, a clearance fit is provided.

(12) The position shown in FIG. 5 shows the position of the rotor disk 2, rotated with reference to the angle of rotation about the rotational axis of the shaft 4, with respect to the retaining flange 5. In this connection, flange recesses 9 and disk webs 12 or flange webs 10 and disk recesses 11 are situated opposite one another. This enables the rotor disks 2 to be pushed over or onto the retaining flange 5 in the axial direction in a largely low-friction, blockage-free manner 2 during assembly of the rotor disks 2.

(13) In contrast to the assembly position from FIG. 5, FIG. 6 shows the position of rotor disks 2 and retaining flanges 5 in the completely assembled state, i.e., in the operating state. This is achieved by the rotor disk 2 being rotated out of the assembly position (FIG. 5) by such an amount that the flange webs 10 have located opposite thereto the corresponding disk webs 12 and therefore the flange recesses 9 have located opposite thereto the corresponding disk recesses 11. In the exemplary embodiment shown with 6 recesses (and 6 webs), this corresponds to a rotation about an angle of 30. As a result, the achievement in the shaft/hub system is that the cover surfaces of the disk webs 12 and flange webs 10 rest one on top of another as mating surfaces or centering surfaces (FIG. 6), a play-free fit being provided. The play-free, fixed seat of the rotor disks 2 on the drive shaft 4 by means of retaining flanges 5, which is in particular advantageous for impact hammer mills, is consequently just as secured as a comparatively simple (disassembling) assembling of the rotor disks 2 which are exposed to wear.

(14) An important design of a device 20 for disintegrating feedstock, which includes a rotor 1 according to the invention, provides that the disintegration tools 16 of the rotor are realized as hammers, beating bars or similar known striking tools and that the rotor has assigned thereto an impact hammer mill stator 22. The rotor 1 according to the invention is therefore part of an impact hammer mill 20, the disintegration unit thereof also includes a stator which is typical to impact hammer mills, along with the rotor. For example, the stator 22 comprises impact elements 24, such as, for example, beating bars, which are arranged fixedly in an additional impact chamber and by which the feedstock particles caught by the hammers 16 of the rotor 1 are centrifuged and as a result are (preliminarily) disintegrated.

(15) As is apparent from the foregoing specification, the invention is susceptible of being embodied with various alterations and modifications which may differ particularly from those that have been described in the preceding specification and description. It should be understood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.

LIST OF REFERENCES

(16) 1 Rotor 2 Rotor disk 3 Axial hole 4 Drive shaft 5 Retaining flange 6 Connecting element 7 Screw 8 Nut 9 Flange recess 10 Flange web 11 Disk recess 12 Disk web