JPH02237654A - Crushing grinding element for drum type fine grinder - Google Patents

Abstract

PURPOSE: To maintain pulverization performance by forming a crushing and pulverizing element as a cylinder segment having a fixing protrusion part, and enabling to be engaged a hammer head-shaped cross-section to a corresponding rotor groove. CONSTITUTION: A cylindrical rotor 2 is supported by bearings 3, 4 and 5 in a housing 1 of the pulverizing device divided both sides horizontally, and sliding bearings having an inclined segment are used in accordance with diameter, volume and rotating number per every minute. The rotor 2 is provided with a pulverizing gap, pulverizing plate 6 arranged on a cylindrical outer shell portion preliminarily pulverizing chips, and a pulverizing plate 7 having a certain angle to a rotor axis line for defibration An inclination of a pulverizing region against a horizontal line is made into 5-45 degrees in accordance with the shape of the pulverizing plate 7. Thus, the stress to the bearings is decreased and the service life of the bearings is prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention is a crushing and crushing element for a drum-type atomization device for crushing or crushing fibrous materials, which can be attached to a rotor outer shell and is equipped with an engine-driven rotor. Preferably, the outer shell of the rotor has a crushing and crushing surface whose diameter gradually increases and an arbitrary crushing and crushing surface that is steeply inclined with respect to the rotor axis directly adjacent to the crushing and crushing surface that is inclined with respect to the rotor axis. , a crushing device for the atomization device, which is symmetrically provided in the central plane of the material supply.
Regarding the grinding element.

(Technical Background) Such types of crushing and grinding surfaces are subject to wear. For example, if the crushing/milling surface is conical, it is subject to significant wear and must be replaced repeatedly during use of the drum-type atomizer to maintain proper crushing or crushing performance.

OBJECTS OF THE INVENTION An object of the present invention is to make it possible to easily replace worn crushing or crushing surfaces of such drum-type atomizers and maintain appropriate crushing or crushing performance.

DISCLOSURE AND ADVANTAGES OF THE INVENTION The above objects are achieved according to the invention by forming the crushing and comminution element as a cylindrical segment with an anchoring projection with a hammerhead-shaped cross-section on the side facing the rotor axis; This is achieved by making it possible to engage the rotor groove. This type of segmentation has two advantages. That is,
Firstly, the segments can be easily slid in and out of the corresponding rotor groove and can be firmly anchored, for example by using removable wedges.

Second, segments can be replaced for individual areas of the crushing and grinding surface on the rotor shell, leaving the remaining cylinder segments with less-wearing surface areas for further use. can. The shape of the crushing/grinding surface can be any shape such as ribs, sawtooth shapes, grooves and ribs, etc.

In a preferred embodiment of the invention, a rib of hammerhead cross-section and two adjacent segments in contact can be provided on the rake shell holding the cylinder segment. If the transition plane between the hammerhead and the hammerhead stem is a plane, and each plane makes the same acute angle opened to the rotor axis in opposite directions with the hammerhead as the plane of symmetry, then
The cylinder segment can be seated particularly securely during operation. This effect is achieved by arranging the lateral sides of the cylinder segments in the anchored state in a plane extending radially towards the rotor axis in the area outside the hammerhead, such that the lateral sides of adjacent cylinder segments are in contact with each other. This can be further promoted by

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings regarding a drum-type micronization device for producing mechanical pulp from chips.

Embodiment As shown in FIGS. 1 to 5, a cylindrical rotor 2 has bearings 3 in a micronizer housing 1 which is preferably horizontally divided on both sides.
, 4.5, rolling or sliding bearings, in particular sliding bearings with inclined segments, are used depending on the diameter, capacity and revolutions per minute. The rotor 2 has a grinding gap, a grinding plate 6 arranged on the cylindrical shell part for pre-grinding the chips, and a grinding plate 7 at an angle with the rotor axis for defibration. Depending on the shape of the grinding plate 7, the inclination of the grinding zone with respect to the horizontal line is at an angle between 5 and 45 degrees, preferably 15 degrees.

An opposing grinding plate 9,9' cooperating with the grinding plate 7 is mounted horizontally movably on the stator ring 8 for the grinding gap BFR iff.

3.4 shows an enlarged cross section of the grinding plate area, FIG. 3 the area parallel to the axis and FIG. 4 the truncated conical area. Fourth
As shown, 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. According to the invention, the internal grinding plate 7 in the truncated conical region is made up of segments 7' (FIG. 4).

FIG. 5 shows an embodiment with dimensions actually used.

The partially shown transverse ribs 18 can be omitted. An anchoring projection or hammerhead 19 is arranged in a corresponding rotor groove 20 with a hammerhead-shaped cross section. Segment 7
The grinding surface of ' is provided with a rib 7' and a groove 7'''. A rib 20' of hammerhead-shaped cross section is adjacent to the segment 7' and is located between the grooves 20. Between the hammerhead and the hammerhead stem The transition surfaces 19', 20'' form the same acute angle opening towards the rotor axis, but are oriented in opposite directions with respect to the plane of symmetry 19# of the hammerhead. For strength reasons, the lateral side 7 1V of cylinder segment 7'
．． 7v are preferably arranged in a plane extending radially towards the rotor axis in the area outside the hammer head 19, and contact each other with the lateral sides of adjacent cylinder segments.

The chips are fed in particular by a conveyor screw, which in this example is radially fed by one to four material feed means 10 with peripheral openings.

The chips are pre-crushed in the horizontal grinding gap 11 and distributed symmetrically in both directions. Defibration of the wood takes place in an adjustable grinding gap l2 inclined 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 l6, a motor, preferably a direct current motor with a considerably lower power than the main motor, is provided to reduce the starting current peaks. Compared to the conventional atomization device, according to this embodiment, the atomization device 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. Can easily crush fiber materials other than wood,
Water or other liquids are 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 The rotor 102 itself is therefore supported in this case in a floating manner. For such support, hydrostatic sliding bearings 203, 204 are provided in the bearings 201, 202. These bearings are also connected to the sealing unit l-115'. in the housing 101 of the atomizer.The double arrow 205 indicates the movement of the rotor or the floating rotor support made possible by the above-mentioned support means of the rotor.In this case only one stator It is sufficient that both stators 8 can be adjusted.
of the crushing plates 208. therefore attached to these. 209 adjustments are possible in this case. These grinding plates have a truncated conical section 206. In addition to section 207, section 210.210 makes a larger angle with the rotor axis than sections 208.209, ie approximately a 90 degree angle. It has 211. part 210
.
No. 4, 215.

Stator 8 and therefore crushing plates 206, 207, 21
0,211 adjustment and also the adjustment of the cylindrical grinding plate part 30
3-305 in a manner similar to that shown in FIGS. 1-5, but in this case simultaneously in opposite directions by a curved hoop 218 which is moved uniformly by adjustment means 307-309. 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. An adjustable movement of the grinding gap is made possible by the axial freedom of movement (floating support) of the rotor.

[Brief explanation of drawings]

Fig. 1 is an axial cross-sectional view of the entire micronization device taken on the A-B plane in Fig. 2; Fig. 2 is a front view of the micronization device; Fig. 3 is taken on the CD plane in Fig. 1. Fig. 4 is an enlarged sectional view taken on the plane E-F of Fig. 1; Fig. 5 is an enlarged sectional view of another embodiment similar to Fig. 4, showing the crushing surface area. ; Figure 6. Figure 7. FIG. 8 is a longitudinal, front, and side view, respectively, showing another embodiment 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 grinding plate 10...Material feeding means 11...Horizontal grinding gap 12...Inclination Grinding gap 15... Sealing unit 17... Opposing rib 18...
・Horizontal rib 19...fixing protrusion or hammer head 19',
20"...Transition surface 20...Rotor groove 101...Housing 102...Rotor 110#...Annular space 115'...Sealing unit} 201, 202
...Bearing 203. 204...Sliding bearing 206, 207, 210, 211...Crushing plate 2
18...Curved hoop

Claims (1)

[Scope of Claims] 1. A crushing and crushing element for a drum-type atomization device for crushing or crushing fibrous materials, which is equipped with an engine-driven rotor that can be attached to a rotor shell, and has a diameter that gradually increases. A crushing and crushing surface that is tilted with respect to the rotor axis and any crushing and crushing surface that is steeply inclined with respect to the rotor axis directly adjacent to the crushing and crushing surface that is inclined with respect to the rotor axis are preferably placed on the rotor outer shell, preferably in the center plane of the material supply. For crushing and refining equipment, which is symmetrically equipped with
In the crushing element, the crushing and crushing element has an anchoring projection (19) with a hammerhead-shaped cross section on the side facing the rotor axis.
) in the form of a cylinder segment (7') which can be engaged in a corresponding rotor groove (20) of hammerhead-shaped cross section. 2. To form a crushing and crushing surface on the rotor (2, 102), ribs (7'') or grooves (7''') are provided on the side of the crushing and crushing segment (7') facing away from the rotor axis. ) The crushing/grinding element according to claim 1, further comprising: 3. Claim characterized in that ribs (20'') of hammerhead-shaped cross-section, each with two adjacent segments (7'), are provided on the rotor shell for holding the cylinder segments (7'). A structure comprising the crushing and crushing element according to 1 or 2. 4. The transition surfaces (19', 20'') between the hammer head and the hammer head stem are flat, and each plane is a plane of symmetry with the hammer head (19''). 5. Structure with crushing and crushing elements according to claim 1 or 2, characterized in that the crushing and crushing elements make the same acute angle opening with respect to the rotor axis in opposite directions as the cylinder segments (7) in the anchored state. ') side surface (7^I
^V, 7^V) are arranged in the outer region of the hammerhead (19) in a plane extending radially towards the rotor axis, the lateral sides of adjacent cylinder segments touching each other. According to claim 1 or 2, especially claim 3
Or a structure equipped with the crushing/pulverizing element according to 4.