JPH0429791B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for crushing or crushing fibrous materials, particularly wet or aqueous fibrous materials, preferably chips, and in particular to a drum-shaped atomization apparatus. . The atomization device has a motor-driven rotor with at least two crushing or comminution elements, the surfaces of said elements, preferably surfaces of rotation, in particular frustoconical surfaces, being inclined with respect to or against the rotor bearings. a housing extending substantially perpendicularly, the diameter of which increases in a direction away from the at least one material supply means, and receiving a preferably horizontal rotating shaft and a rotor, the housing being arranged on a corresponding inner wall; at least one material supply means generally radial to the rotor axis or generally tangential to the rotor jacket or housing having opposing crushing or crushing surfaces that are substantially central to said housing, with the crushing or crushing surfaces facing the rotor; extending from the material supply means on both sides onto the inner housing wall on the jacket and correspondingly on an inclined or substantially perpendicularly extending surface, preferably a rotating surface, in particular a frustoconical surface, said frustoconical The diameter of the surface increases with distance from the material supply means, said frustoconical surface forming an angle with respect to the rotor axis that opens out in front of the rotor on both sides.

Most comminution equipment currently used to produce wood pulp mechanically generally has a disk that rotates about a horizontal axis and has a grinding plate. This disk and the same opposite disk with the grinding plate may be rotating or stationary. In this known example, the entire grinding gap or a large part thereof extends vertically or is inclined in the peripheral region towards the axis of rotation. Since high contact pressures of the grinding plates are required for the grinding operation, excessive stresses are applied in the known example to the material and first of all to the bearings. This means that the maximum allowable throughput of the miniaturization device is limited. The resulting use of high mechanical energy results in the generation of large amounts of steam in the grinding gap, since primarily wet or humid materials or materials mixed with water are crushed or crushed. Good utilization or recovery of energy and unhindered loading of chips etc. require adequate evacuation of the steam together with the fiber material produced or recovered;
This is difficult to implement due to the large amount of steam generated. In particular, it is difficult to arrange the grinding gap vertically in conventional disk-type atomizers. This is because it results in partial separation of the fibrous material and a strong backflow of the generated steam.

The object of the invention is to reduce material stresses, increase material throughput, increase the number of rotations per minute of the rotor or shaft, and improve the problems of steam generation and steam exhaust.

The above object can be achieved according to the invention in a crushing or grinding device or a micronization device of the type mentioned at the beginning of the text. The device of the invention comprises a crushing or crushing surface extending approximately parallel to the rotor axis on the jacket of a drum-shaped rotor between the material supply means and a crushing or crushing surface of increasing diameter, and an opposing crushing surface arranged on the housing. or a grinding surface is provided, forming a grinding gap parallel to said axis and a grinding gap inclined to said axis, which are symmetrical with respect to the midplane of at least one, preferably two or more, material supply means. , said feeding means are preferably uniformly distributed over the circumference of the rotor, in particular substantially radially or tangentially, and the crushing or comminution surface parallel to the axis is in particular directly connected to the frustoconical crushing or comminution surface. The truncated conical grinding surface is inclined towards the rotor axis by an angle of approximately 5 to 45 degrees, in particular by 15 degrees, and said inclined grinding or grinding surface is immediately and particularly uniformly inclined by the optionally merging grinding or grinding surface. , these grinding surfaces make an angle of inclination with respect to the rotor axis that is greater than the angle of the inclined grinding or grinding surfaces, in particular an angle of approximately 90 degrees. The grinding surface according to the invention guarantees a particularly effective differential brake and at the same time facilitates steam extraction, reduced material stress, reduced bearing stress, increased material throughput, increased revolutions per minute and It is possible to pre-crush the material in parallel crushing gaps and to specifically transform said crushing gap into an axial crushing gap to particularly facilitate the crushing operation. The grinding operation is made easier by arranging the opposing grinding surfaces on one or two stator rings that are movable independently of each other. The micronization device of the present invention is particularly suitable for TMP (thermo-mechanical pulp).
Suitable for CTMP (chemical thermomechanical pulp) production. According to the invention, the radially fed gear, preferably pre-milled in a horizontal grinding gap, is distributed symmetrically in two directions, resulting in a particularly effective differential break for wood and the like. can be carried out in an adjacently inclined, preferably adjustable, in particular conical grinding gap. This gap optionally extends approximately perpendicular to the rotor axis to further facilitate steam evacuation.

The metering can be particularly controlled if the grinding cap, which extends obliquely or at right angles to the axis, is adjustable. For this purpose, for example, opposing crushing or grinding surfaces are provided on the stator ring, in particular on at least two stator rings. These rings are arranged to be movable substantially horizontally within the housing, independent of each other. Grinding gap is important in controlling pulp properties.

A convenient adjustment of the grinding gap is achieved, if only one movable stator ring is provided, by supporting the rotor movably, in particular floatingly, on both sides in its bearings. For this floating support, the rotor is preferably axially movably supported in a hydrostatic sliding bearing, and a sealing unit, in particular a sliding ring seal, is provided between said sliding bearing and the interior of the housing receiving the rotor. encloses the rotor shaft in a bearing housing. Material feeding can be carried out particularly conveniently if an annular material feeding gap is provided. This feed gap communicates in the housing with an annular space surrounding the outside of the rotor, and in particular substantially tangential or substantially radial material feed means feed into said space, said feed gap having a crushing or comminution surface parallel to the axis. approximately in a midplane intersecting the axis of the device or its housing.

In a further embodiment of the invention, the cavities into which the crushing or crushing gears, in particular conical or perpendicularly extending, are inserted, are provided in the region of the two front walls of the housing, close to the shaft bearing of the rotor, and which are aligned with the axis. It has crushing or comminution surfaces extending parallel and approximately perpendicular to the axis. The ground material is conveyed into the interior space of the housing of the device, in particular the atomization device, and is discharged together with the generated steam. This makes it easier to vent the steam,
Or vapor exhaust means are made. Due to the generation of steam, the cavity is sealed against the ingress of steam into the two bearings by means of a special sealing unit. The sealing unit is inserted between the rotor and the bearing in the rotor-side bearing housing. These cavities are preferably provided at the bottom with discharge openings for the ground material.

In practice, it is particularly advantageous if the drum-shaped rotor is supported on sliding bearings. The rotor has on its jacket a crushing or crushing surface extending generally parallel to the axis and adjacent crushing or crushing surfaces on both sides, the latter crushing surfaces having a diameter increasing away from the material supply means; It has a crushing or grinding surface extending substantially perpendicular to the axis. The rotor is supported on the bearing by a rotating shaft fixed thereto. A special starting motor, particularly a DC motor, is provided for starting operations, and the main motor is configured to run at approximately 3000-3600 rpm at full load. This starting motor is provided at the free end of the stator shaft. It requires a considerably lower power than that required by the main motor to operate the crushing or comminution surface, especially the atomization device. The starting current peak is therefore reduced. Embodiments of the micronization device according to the present invention allow large-sized devices of this type to be operated at rotational speeds up to 3600 rpm.

Instead of a truncated conical grinding gap adjacent to the grinding gap extending parallel to the axis, gap shapes with other surfaces of rotation can be used. For example, shapes such as paraboloids of revolution, hyperboloids of revolution, etc. can be used, the diameter of these surfaces increasing in particular constantly from the point of contact with the grinding surface extending parallel to the axis to the front of the rotor;
It is necessary to ensure that the target material passes through.

In the known atomization device, a conical ear shaft is provided with a crushing rod of variable length around its periphery and is arranged in a conical internal space of a housing, the inner wall of said housing being provided with corresponding opposing rods. Make a grinding gap of 2mm. Material feeding takes place on one side of the device in the area of the ear shaft. The output of this atomization device is unsatisfactory because the material feed is from one side only and immediately onto the shaft and directly into the conical grinding gap. Neither a satisfactory differential eyebrasion nor an appropriate pulp production effect can be obtained. This device is used with the same dimensions as known conical refiners.

In known microatomizers, the grinding elements are fed from the top by means of a screw conveyor to the center of a hollander extending parallel to the axis of the separating impeller. The hollander forms a gap parallel to the axis, and a housing receives the impeller, which has a small notch in its inner wall. The ground material that is ground in the parallel gap is carried by an air stream from the grinding zone from the outside to the inside and passes through the separating impeller in the process. The separated coarse grinding material is returned to the grinding zone. Two blowers on either side of the grinding shaft create the necessary air flow. Apart from the absence of a conical grinding gap or the like adjacent to the grinding gap parallel to the axis, this known device is not suitable for processing chips or other wet fibrous materials.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention of a drum-shaped refining device for producing wood pulp from chips will now be described in detail with reference to the drawings.

1 to 5 show a preferably horizontally divided atomizer housing 1 in which a cylindrical rotor 2
is supported on bearings 3, 4, 5 on both sides, using rolling or sliding bearings, in particular sliding bearings with inclined segments, depending on the diameter, capacity and revolutions per minute. The rotor 2 has grinding gears 6, 7, the grinding plates 6 are arranged along the cylindrical jacket part of the housing to pre-crush the chips, the grinding plates 7 are arranged at an angle with the axis of the rotor for differential braking. to do. To create the grinding plate 7, the angle between the grinding area and the horizontal line is between 5 degrees and 45 degrees, preferably 15 degrees. Opposite grinding plates 9, 9' cooperating with the grinding plate 7 are mounted on the stator ring 8 so as to be horizontally movable for adjusting the grinding gap.

Figures 3 and 4 show enlarged cross-sections of the crushing plate area;
FIG. 3 shows a region parallel to the axis, and FIG. 4 shows a truncated cone region. As shown in FIG. 4, the opposing ribs 17 of the external grinding plate 9 are reinforced by transverse webs or ribs 18. Webs or ribs 18 may be provided to retain the fibrous material and increase residence time within the grinding zone. The internal grinding plate 7 in the truncated conical region is made up of segments 7' (FIG. 4). The dimensions of this particularly practical embodiment are shown in FIG. 5, in which only a portion of the transverse ribs 18 are shown. Fixing protrusion 19
is the corresponding rotor groove 2 with a hammerhead-shaped cross section.
Placed within 0.

The chips are fed in particular by means of a conveyor screw, in this embodiment from 1 to 4 chips with openings around the periphery.
The material is fed in the radial direction by the material feeding means 10. The chips are pre-ground in a horizontal grinding gap 11 and distributed symmetrically in both directions. The differential breaking of the wood takes place in an adjustable grinding gap 12 tilted to the horizontal. The ground material is then conveyed to the internal space 13 of the housing 1 of the atomizer and discharged together with the generated steam.

The bearing is sealed against steam in the housing by means of a sealing unit 15.

At the free end of the shaft 16, a motor, preferably a DC motor, is provided with considerably less power than the main motor to reduce starting current peaks.

According to this embodiment, which is modified from the conventional atomization apparatus, the atomization apparatus of the present invention can be operated at a rotation speed of up to 3600 rpm.

The present invention can be advantageously applied to a micronization device having a vertical rotor shaft. Fibrous materials other than wood can be easily crushed and water or other liquids can be added to the pre-crushed material under certain conditions.

According to the invention, the material stress is significantly reduced compared to known atomization devices, the stress on the bearing is reduced, and the service life of the bearing is increased. This results in increased material throughput.

The embodiment of FIGS. 6-8 differs from the previous embodiments, inter alia in the type of feed material, the special support of the rotor and the modified stator adjustment. Corresponding parts are labeled with the same numbers as in FIGS. 1-5.

In this embodiment, the material feed takes place approximately tangentially to the rotor 102 at two locations 110' into the annular space 110'', from where the material is then conveyed to the grinding plate. The shaft end 116' of the rotor 102 Therefore, the rotor 102 itself is supported in a floating manner in this case.To support it in this way, hydrostatic sliding bearings 203 and 204 are mounted on the bearing 20.
1,202. These bearings are also connected to the housing 1 of the micronization device by means of a sealing unit 115'.
01 and sealed against steam. double arrow 205
shows the movement of the rotor or the floating rotor support made possible by the above-mentioned support means for the rotor. In this case it is sufficient that only one stator can be adjusted; it is likewise possible in this case to adjust both stators 1, 1' and thus also the grinding plates 206, 207 attached to them. These grinding plates, in addition to the frustoconical sections 206, 207, form a larger angle with the rotor axis than the sections 208, 209, i.e. approximately 90
It has portions 210 and 211 forming angles of degrees. an additional grinding plate 212 cooperating with parts 210, 211;
213, like sections 210, 211, is steeply inclined to the rotor axis and is supported by special rings 214, 215 connected to rotor 102.

of the stator 1, 1' and hence of the crushing plate 206, 2
07, 210, 211 and the cylindrical crushing plate are also carried out in the same manner as shown in FIGS.
Curved hoop 21 moved uniformly by 9
8 simultaneously in opposite directions. Due to the floating rotor, adjustment of only one stator can be carried out as well. The second stator is then fixedly supported within the housing. Adjustment movement of the grinding gap is made possible by the free axial movement of the rotor (floating support).

[Brief explanation of drawings]

FIG. 1 is an axial sectional view taken on plane A-B in FIG. 2; FIG. 2 is a front view of the device of the present invention; FIG. 3 is an enlarged sectional view taken on plane CD in FIG. 1; Figure 4 is the first
An enlarged sectional view on the E-F plane of the figure; FIG. 5 is an enlarged sectional view of another embodiment similar to FIG. 4; FIGS. 6 and 7
8 are a longitudinal sectional view, a front view, and a side view, respectively, showing other embodiments of the grinding gap and floating rotor support. 1...Housing, 2...Cylindrical rotor, 3,
4, 5...Bearing, 6,7...Crushing plate, 8...Stator ring, 9,9'...External crushing plate, 10...
Material feeding means, 11...Horizontal crushing gap, 12
... Inclined crushing gap, 15 ... Sealing unit, 17 ... Opposing ribs, 18 ... Lateral ribs, 10
1...Housing, 102...Rotor, 110''
... annular space, 115' ... sealing unit,
201, 202... bearing, 203, 204... sliding bearing, 206, 207, 210, 211... crushing plate, 218... curved hoop.

Claims (1)

Claims: 1. A motor-driven rotor with at least two rotating surfaces, said rotating surfaces having crushing or comminution elements whose diameter increases away from at least one material supply means and further receiving the rotor. a housing, the housing having a corresponding inner wall and an opposing crushing or crushing surface disposed thereon, the at least one material supply means being disposed approximately centrally in the housing, and the crushing or crushing surface being a jacket of the rotor. extending on both sides of an inclined surface remote from the material supply means on the upper and inner walls of the housing, said inclined surface increasing in diameter away from said material supply means and opening in front of the rotor with respect to the rotor axis; In such an angular crushing or crushing device for fibrous materials, a crushing or crushing surface extending approximately parallel to the rotor axis and a corresponding opposing crushing or crushing surface on the housing are connected to the material supply means and the crushing device increases in diameter. or at least one crushing or crushing surface and an opposing crushing or crushing surface provided on the drum-shaped rotor jacket between the crushing surfaces and forming a crushing gap extending parallel to the axis and inclined correspondingly to the axis; Crushing of fibrous material, characterized in that the crushing or crushing surface, which is arranged symmetrically with respect to the central plane of the material supply means and is inclined towards the axis, is directly joined to the crushing or crushing surface parallel to the axis. or crushing equipment. 2 The crushing or crushing surface is approximately 5 to 45 degrees from the rotor axis.
2. A device according to claim 1, characterized in that it forms an angle of .degree. 3. The inclined crushing or crushing surface directly joins the crushing or crushing surface at an angle of inclination relative to the rotor axis, said angle being greater than the angle of said inclined crushing surface. equipment. 4. The device of claim 3, wherein the angle of inclination is approximately 90 degrees. 5. The crushing gear according to claim 1, characterized in that the crushing gear inclined towards the axis is adjustable, for which purpose the facing crushing or crushing surfaces are provided on at least one stator ring which is movable substantially horizontally within the housing. Device. 6. Device according to claim 5, characterized in that it is provided with at least two movable stator rings. 7. The device according to claim 6, characterized in that the stator rings are movable independently of each other. 8. The apparatus of claim 5, wherein the rotor is movably supported in bearings on both sides. 9 The rotor is supported in a floating manner in a hydrostatic sliding bearing so as to be freely movable in the axial direction, and the sealing unit surrounds the rotor shaft in the bearing housing between the sliding bearing and the inside of the housing that receives the rotor. The device according to claim 8, which is patented. 10. An annular material feed gap connects in the housing to an annular space surrounding the outside of the rotor and feeds the feed material into said space, said annular material feed gap substantially in a midplane intersecting the axis of the device or of its housing. 2. Device according to claim 1, characterized in that it is provided between crushing or comminution surfaces extending parallel to the axis within the device. 11. A cavity is provided in the region of the two front walls of the housing near the shaft bearings on both sides of the rotor with crushing or crushing surfaces parallel to and inclined to the axis, said crushing or crushing gap being located within said cavity. the cavity is sealed in a steam-tight manner to the two bearings by means of a special sealing unit, said sealing unit being inserted into the bearing housing between the rotor and the bearing on the side of this rotor. 2. The device according to claim 1, further comprising a discharge opening for the ground material. 12. A drum-shaped rotor is provided on its jacket, the crushing or crushing surfaces extending substantially parallel to its axis and adjacent on both sides, the diameter of the crushing or crushing surface increasing with distance from the material supply means, said rotor It is supported in sliding bearings by a rotating shaft fixed to the rotor, and a special starting motor is provided for starting operations, with the main motor having a
2. The apparatus of claim 1, wherein the apparatus is configured to operate at 3600 rpm. 13 having a motor-driven rotor having a frustoconical surface with at least two crushing or comminution elements and a diameter increasing away from the at least one material supply means, said rotor having a horizontal rotating shaft; a housing having a corresponding inner wall and opposing crushing or comminution surfaces disposed thereon, the housing receiving a rotor and having at least one material supply means oriented generally radially relative to the rotor axis; arranged approximately in the center of said housing, with a crushing or crushing surface extending over the jacket of the rotor and thus on the inner wall of the housing to both sides away from the material supply means on the inclined surface; A drum for crushing or grinding wet fibrous materials, the diameter of which increases away from the material supply means, said inclined surfaces being open on both sides in front of the rotor and forming an angle to the rotor axis. In a shape refining device, a crushing or crushing surface extending substantially parallel to the rotor axis on the jacket of a drum-shaped rotor and a corresponding opposing crushing or crushing surface on the housing are connected to a material supply means and a crushing surface of increasing diameter. or between the crushing surfaces, the crushing or crushing surfaces facing the crushing or crushing surfaces forming a crushing gap parallel to said axis and oblique to said axis are in the central plane of at least one substantially radial material supply means; A drum-shaped atomization device, characterized in that a crushing or crushing surface parallel to the axis is directly joined to a crushing or crushing surface inclined toward the axis. 14 The crushing or crushing surface is approximately 5 to
14. The drum-shaped atomization device according to claim 13, characterized in that it forms an angle of 45 degrees. 15. The drum-shaped fine grinder according to claim 13, wherein the inclined crushing or crushing surface having an inclination angle larger than the inclination angle of the crushing surface is directly joined to the crushing or crushing surface inclined with respect to the rotor axis. conversion device. 16. The drum-shaped atomization device according to claim 15, wherein the enlarged angle is approximately 90 degrees. 17. The grinding gear according to claim 13, characterized in that the grinding gear inclined towards the axis is adjustable, for which purpose the facing grinding or grinding surfaces are provided on at least one stator ring which is movable substantially horizontally within the housing. Drum-shaped micronization device. 18. A drum-shaped atomization device according to claim 17, characterized in that it is provided with at least two movable stator rings. 19. The drum-shaped atomization device according to claim 18, wherein the stator rings are movable independently of each other. 20. Drum-shaped atomization device according to claim 17, characterized in that, if only one movable stator ring is provided, the rotor is movably supported on both sides in its bearings. 21 The rotor is axially movably supported in a floating manner within a hydrostatic sliding bearing, and a sealing unit surrounds the rotor shaft within the bearing housing between the sliding bearing and the interior of the housing receiving the rotor. The drum-shaped atomization device according to claim 20. 22 An annular material supply gap is connected in the housing to an annular space surrounding the outside of the rotor, into which space the material supply means feeds generally radially, said supply gap being substantially aligned with the axis of the atomization device or of its housing. 14. The drum-shaped atomization device according to claim 13, characterized in that it is provided between crushing or crushing surfaces parallel to the axis in intersecting central planes. 23 Cavities feeding from the crushing or crushing gear are provided in the two front areas of the housing near the shaft bearings, said shaft bearings being provided on both sides of the rotor with crushing or crushing surfaces parallel to the axis, said cavities being provided with special seals. sealed in a steam-tight manner to the two bearings by a sealing unit, said sealing unit being arranged in the bearing housing on the rotor side between the rotor and the bearing and having a discharge opening for the pulverized material; The drum-shaped atomization device according to claim 13, characterized in that: 24. A drum-shaped rotor is provided on a jacket having a crushing or crushing surface extending substantially parallel to the axis and a crushing or crushing surface whose diameter increases as it moves away from the material supply means adjacent on both sides, said rotor being fixed to the rotor. 2. A special starting motor is provided for the starting operation, the main motor being arranged to operate at approximately 3000 to 3600 rpm at full load. 14. The drum-shaped atomization device according to 13. 25 having a motor-driven rotor having at least two rotating surfaces with crushing or comminution elements increasing in diameter away from the at least one material supply means, further comprising a horizontal rotating shaft and a housing receiving the rotor; have,
The housing has a corresponding inner wall and opposing crushing or crushing surfaces provided thereon, the housing having at least one
The two material supply means extend approximately tangentially to the rotor jacket or housing shell and are provided approximately in the center of said housing, and the crushing or comminution elements are located on the rotor jacket and on the corresponding inner wall of the housing. The fibers extend on both sides away from the material supply means on inclined surfaces whose diameter increases as they move away from the material supply means, and the entire inclined surface forms an angle on both sides with respect to the rotor axis, opening in front of the rotor. In a drum-shaped refining device for crushing or grinding of fibrous materials or fibrous materials mixed with water, the crushing or grinding surface extending approximately parallel to the rotor axis has a diameter on the jacket of the material supply means and the drum-shaped rotor. a crushing or crushing surface extending between the increasing crushing or crushing surfaces and corresponding opposing crushing or crushing surfaces provided on the housing forming a crushing gap parallel to and inclined to the axis; the crushing or crushing surface facing the at least one substantially tangential material feeding means is arranged symmetrically with respect to the central plane of the material supply means, and the crushing or crushing surface parallel to the axis is directly connected to the crushing or crushing surface oblique to the axis. A drum-shaped micronization device characterized by being joined. 26 The crushing or crushing surface is approximately 5 to 45 mm away from the rotor axis.
26. The drum-shaped atomization device according to claim 25, characterized in that the drum-shaped atomization device forms an angle of .degree. 27. A claim characterized in that the inclined crushing or crushing surface is directly connected to a crushing or crushing surface having an angle with respect to the rotor axis, and said inclination angle is greater than the inclination angle of said inclined crushing surface. Section 25
The described drum-shaped atomization device. 28. The drum-shaped atomization device of claim 27, wherein said angle is approximately 90 degrees. 29. The grinding gear according to claim 25, characterized in that the grinding gear tilted towards the axis is adjustable and the opposing grinding or grinding surfaces therefor are provided on at least one stator ring which is movable substantially horizontally in the motor. Drum type micronization device. 30. A drum-shaped atomization device according to claim 29, characterized in that it is provided with at least two movable stator rings. 31. The drum-shaped atomization device according to claim 30, characterized in that the stator rings are movable independently of each other. 32. Drum-shaped atomization device according to claim 29, characterized in that when only one stator ring is provided, the rotor is movably supported on both sides in its bearings. 33 A rotor is supported in a floating manner in a sliding bearing for axial movement, and a sealing unit, mainly in the form of a sliding ring seal, is provided between the sliding bearing and the interior of the housing receiving the rotor in the bearing housing. 33. A drum-shaped atomization device according to claim 32, characterized in that it surrounds a rotor shaft of. 34 An annular material feed gap connected to an annular space surrounding the outside of the rotor in the housing into which a substantially tangential material feed means feeds, said gap having a substantially drum-shaped shape between the crushing or comminution surfaces parallel to the axis. 26. A drum-shaped atomization device according to claim 25, characterized in that it is provided in a central plane intersecting the axis of the atomization device or its housing. 35 Cavities into which the crushing or crushing gear feeds are provided in the area of the two front walls of the housing near the shaft bearings, said shaft bearings having crushing or crushing surfaces parallel to and inclined to the axis on both sides of the rotor. and the cavity is sealed steam-tightly to the two bearings by a special sealing unit, said sealing unit being inserted between the rotor and the bearing in the rotor housing on the rotor side and crushed. 26. Drum-shaped atomization device according to claim 25, characterized in that it has a discharge opening for the material. 36. A drum-shaped rotor having on its jacket a crushing or crushing surface extending generally parallel to its axis and adjacent crushing or crushing surfaces on each side thereof increasing in diameter away from the material supply means, said rotor comprising: It is supported by a rotating shaft fixed to it in a sliding bearing and is equipped with a special starting motor for starting operations, the main motor having a
26. The drum-shaped atomization device according to claim 25, characterized in that it is configured to operate at a speed of 3,600 rpm to 3,600 rpm.