JP2011240280A - Vibration mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration mill usable in any of a dry type and a wet type, and capable of pulverizing finely an object to be treated in a high centrifugal force field, in a short time.SOLUTION: The vibration mill includes a driving shaft 6 supported rotatably along a vertical direction, and a pulverizing part 30 rotated by the driving shaft 6 in the periphery of the driving shaft 6, the driving shaft 6 includes an eccentric part 7 eccentric to an axis of the driving shaft 6, and a counterweight 46 arranged along an anti-eccentric direction of the eccentric part 7, the eccentric part 7 has support parts 31, 32 for supporting rotatably the pulverizing part 30, the driving shaft 6 has a pinion gear 20 rotated around the axis of the driving shaft 6, and the pulverizing part 30 has an internal gear 45 meshed with the pinion gear 20 of the driving shaft 6, to revolve the pulverizing part 30 in the periphery of the driving shaft 6, and a cylindrical part 34 including a vertical-directional crushing wall 39 positioned in the periphery of the driving shaft 6, and an upper opening 34a for feeding the object W to be treated.

Description

  The present invention relates to a mill for pulverizing an object to be processed, and more particularly to a vibration mill for pulverizing an object to be processed in a pulverizing section that vibrates while rotating.

  Conventionally, a pulverization process is an essential process in a selection process of metal raw materials and chemical raw materials, and a product having a product particle size is manufactured by the pulverization process.

  On the other hand, in recent years, processing methods using mechanochemical effects that increase the physical and chemical activity of pulverized materials in metal powders and organic materials by pulverizing the objects to be processed from several tens of microns to the nano level have attracted attention. There is an idea to use it for biomass resource utilization. As an example of such biomass resource utilization, for example, there is an idea to obtain ethanol by crushing a woody biomass raw material, enzymatically saccharifying it and subjecting it to ethanol fermentation.

  In addition, in other objects to be treated, the properties change by fine pulverization, for example, there are objects to be treated that activate the surface or act as a catalyst. A pulverizer capable of fine pulverization is desired.

  For example, as an apparatus for finely pulverizing such an object to be processed, as shown in FIG. 5, a planetary gear 102 that revolves around the sun gear 101 is rotated, and a pulverization container 103 that rotates coaxially with the planetary gear 102. There is a planetary ball mill 100 in which an object to be processed is crushed by a ball 104 (see, for example, Patent Document 1).

  As another prior art, a rotating member having a rotating blade rotating in a cylindrical main body is provided. After rotating the rotating member, a grinding ball is inserted into the cylindrical main body and then processed. There is also a ball mill in which an object is charged and pulverized (for example, see Patent Document 2).

JP 2008-194650 A JP-A-2005-246204

  However, since the planetary ball mill described in Patent Document 1 has a complicated structure for revolving while rotating, a table-top ball mill is currently used as a test. A planetary ball mill that can be used at a practical level capable of processing) has not been put to practical use. Moreover, since the structure for revolving while rotating a plurality of mill pots is complicated, handling is troublesome and it is difficult to efficiently process a large amount of objects to be processed.

  Further, even if the planetary ball mill as described above is pulverized, it takes time to finely pulverize it, and therefore it is difficult to use it for the above-described utilization of biomass resources. Therefore, a machine capable of further pulverizing and capable of pulverizing in a shorter time is desired.

  In addition, since the ball mill described in Patent Document 2 described above is pulverization of an object to be processed in a gravitational field, the pulverization particle size of the object to be processed is limited, and it cannot be pulverized in a short time. .

  Accordingly, an object of the present invention is to provide a vibration mill that can be used for both dry and wet processes and can finely pulverize an object to be processed in a short time in a high centrifugal force field.

  In order to achieve the above object, the present invention provides a vibration mill comprising a drive shaft that is rotatably supported in a vertical orientation, and a crushing portion that is rotated around the drive shaft by the drive shaft. The shaft includes an eccentric portion that is eccentric with respect to the axis of the drive shaft, and a counterweight that is disposed in an anti-eccentric direction of the eccentric portion, and the eccentric portion is a support portion that rotatably supports the crushing portion. The drive shaft has an external gear that rotates about the axis of the drive shaft, and the crushing portion meshes with the external gear of the drive shaft to revolve the crushing portion around the drive shaft It has an internal gear, and a cylindrical part provided with a vertical crushing wall located around the drive shaft and an upper opening into which an object to be processed is introduced.

  Thereby, the pulverizing part is rotated at high speed by the drive shaft, and the pulverized part is vibrated by the eccentric part of the drive shaft while the inside of the cylindrical part of the pulverizing part is made a high centrifugal force field. The object to be processed that collides with the inner surface of the wall can be further pulverized. In addition, since the eccentric portion is vibrated while rotating the cylindrical portion, the workpiece can be finely pulverized in a short time. Therefore, it becomes possible to pulverize the material to be treated such as a wood raw material into further fine powder in a short time, and it is possible to constitute a vibration mill useful in the production of biomass raw materials and mechanochemical fields.

  The cylindrical portion includes an upper diameter-reduced portion having an upper end that is reduced in diameter upward and the upper opening at the upper end, and a lower diameter-reduced portion having a lower end that is reduced in diameter downward and a lower opening at the lower end. It may be. In this way, the object to be processed introduced from the upper opening is held on the inner surface of the pulverization wall of the cylindrical part between the upper diameter-reduced part and the lower diameter-reduced part of the high centrifugal force field, and the object to be treated has a high centrifugal force. It can be pulverized by shaking in the field. Moreover, since the pulverized workpiece can be discharged downward by reducing the centrifugal force of the cylindrical part, it is pulverized continuously or batchwise by controlling the centrifugal force acting on the cylindrical part. The powder can be mass-produced by processing.

  Further, the pulverizing unit may be configured to pulverize the object to be processed by introducing a pulverizing medium together with the object to be processed. In this way, the grinding media can be vibrated together with the object to be treated in the grinding part of the high centrifugal force field, and the object to be treated can be pulverized smaller in a shorter time.

  Moreover, the said support part may be arrange | positioned at the vertical direction intermediate part of the said cylindrical part, and the lower part of this cylindrical part. In this way, the pulverizing part can be rotated at high speed to form a high centrifugal force field, and the pulverizing part to be vibrated with a larger vibration acceleration can be stably supported for a long period of time.

  Furthermore, the drive shaft may have a double-end support structure in which the upper and lower portions are supported by support bearings. If it does in this way, the change of the weight balance by throwing a processed material into the rotating crushing part can be stably supported by the upper and lower support bearings.

  Further, an anti-vibration support part for anti-vibration support of the upper portion of the drive shaft may be provided, and the anti-vibration support part may be configured to suspend the pulverization part together with the drive shaft for anti-vibration support. If it does in this way, even if a weight balance changes by throwing a processed material into the crushing part which is rotating, the vibration can be absorbed by an anti-vibration support part.

  Further, the anti-vibration support portion may be configured to suspend and support the upper portion of the drive shaft with anti-vibration rubber arranged radially with respect to the drive shaft axis. In this way, even if the weight balance of the pulverized portion is lost by putting the object to be processed, it is possible to return to a stable posture by the alignment action by the vibration-proof rubber such as a rubber spring.

  Moreover, you may provide the casing which seals the circumference | surroundings of the said grinding | pulverization part. If it does in this way, reaction acceleration | stimulation and reaction suppression can be aimed at by grind | pulverizing a to-be-processed object in gas, such as inert gas, or liquids, such as alcohol.

  According to the present invention, vibration is applied to the pulverizing wall of the cylindrical part in the pulverizing part that has become a high centrifugal force field to collide and pulverize the object to be processed. Can be done in a short time.

It is a longitudinal section showing a vibration mill concerning a 1st embodiment of the present invention. (a) is explanatory drawing of the side view which shows typically the centrifugal force and vibration force in the vibration mill shown in FIG. 1, (b) is a schematic illustration of the centrifugal force and vibration force of the vibration mill. It is explanatory drawing of the planar view shown. It is a longitudinal cross-sectional view which shows the vibration mill which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the planar view which shows the outline | summary of the conventional planetary ball mill.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a saddle-type vibration mill that can have a sealed structure will be described as an example.

  As shown in FIG. 1, in the vibration mill 1 according to the first embodiment, a cylindrical casing 3 is fixed to an upper portion of a gantry 2, and a drive shaft 6 is supported vertically at a vertical position of the casing 3. The drive shaft 6 is an eccentric shaft having an eccentric portion 7 of the eccentric shaft center V2 that is eccentric by a predetermined eccentric amount V3 with respect to the drive shaft center axis V1 from the center in the vertical direction to the lower portion. The casing 3 has a sealed structure except for the lower side.

  The drive shaft 6 includes an end support structure supported by support bearings 8 and 9 provided on an upper support plate 4 provided on an upper portion of the casing 3 and a lower support frame 5 provided on a lower portion of the casing 3. It has become. The upper support plate 4 is provided with an input chute 10 for supplying an object to be processed and pulverized media to a cylindrical portion 34 of the pulverizing unit 30 described later.

  A driven pulley 11 is provided at the upper end of the drive shaft 6, and the driven pulley 11 is driven by a belt 14 by a drive pulley 13 that is rotated by a drive motor 12 provided on the side of the casing 3. It has become so.

  The upper support bearing 8 provided on the upper support plate 4 is provided inside a pinion gear unit 16 fixed to the upper support plate 4 with bolts 15. The pinion gear unit 16 is provided with a flange portion 17 at an upper portion thereof, and a bearing portion 18 and a cylindrical portion 19 extending downward from the flange portion 17 are formed, and an outer periphery around a lower end portion of the cylindrical portion 19 is formed. A gear pinion gear 20 is provided. The upper support bearing 8 is disposed on the bearing portion 18 of the pinion gear unit 16.

  The lower support bearing 9 provided in the lower support frame 5 is provided with a bearing so as to support the lower end portion of the drive shaft 6 in a bearing casing provided in the lower support frame 5.

  The drive shaft 6 supported by these bearings 8 and 9 is rotatable by the driven pulley 11 provided at the upper end. A collar 21 and sealing materials 22 and 23 are provided between the driven pulley 11 and the upper support bearing 8. The sealing material 23 is a labyrinth seal in which the uneven member 23a provided on the drive shaft 6 and the uneven member 23b provided on the pinion gear unit 16 are combined with a gap. Further, a metal seal block 24 having a lower surface serving as a seal surface 24a is provided at the lower portion of the flange portion 17 of the pinion gear unit 16.

  On the other hand, the crushing part 30 is provided in the eccentric part 7 of the drive shaft 6 so as to be rotatable about the drive shaft 6. The crushing portion 30 includes an upper support portion 31 and a lower support portion 32 supported by the eccentric portion 7 of the drive shaft 6, stays 33 provided radially from the support portions 31 and 32, and the stay 33 And a cylindrical portion 34 provided at the outer end. The upper support portion 31 is disposed at the middle portion in the longitudinal direction of the tubular portion 34, and the lower support portion 32 is disposed at the lower portion of the tubular portion 34.

  The cylindrical portion 34 includes an upper diameter-reduced portion 35 whose upper end is reduced in diameter upward and has an upper opening 34a at the upper end, and a lower diameter-reduced portion whose lower end is reduced in diameter downward and has a lower opening 34b at the lower end. 36, and is open in the vertical direction. The upper reduced diameter portion 35 is reduced in diameter by a small angle, and the lower reduced diameter portion 36 is reduced in diameter by a large angle. As will be described later, the angle of the lower diameter-reduced portion 36 is set to an angle at which the workpiece W and the grinding media X can be held on the inner surface of the cylindrical portion 34 in a state where centrifugal force is acting. Yes. The cylindrical portion 34 becomes a crushing wall 39 as will be described later.

  Furthermore, since the pulverization medium X for pulverizing the workpiece W is formed of a material such as SUS, alumina, or zirconium, as will be described later, the pulverization unit 30 is made of the same material such as SUS, alumina, zirconium, or the like. Formed of material.

  In the pulverizing part 30, support parts 31 and 32 are rotatably supported by an upper bearing unit 37 and a lower bearing unit 38 provided in the eccentric part 7. For the upper bearing unit 37 and the lower bearing unit 38, a bearing capable of stably supporting a large radial load or the like is employed. The lower bearing unit 38 is provided with a lubrication path 42 that lubricates the bearing portion from above.

  A seal ring 40 is provided at the upper end of the upper support portion 31 so as to be in contact with the seal surface 24 a of the seal block 24. The lower end of the upper support portion 31 and the lower support portion 32 is provided with a seal material 41 that contacts the eccentric portion 7 of the drive shaft 6. The seal ring 40 and the sealing material 41 maintain the sealing performance with the fixed side even in a state where the pulverizing unit 30 that is a rotating body is rotating.

  Further, the upper support portion 31 is provided with an internal gear 45 of an internal gear that meshes with the pinion gear 20 provided at the lower end of the pinion gear unit 16, and the internal gear 45 is an eccentric amount of the drive shaft 6. The pinion gear 20 is meshed with V3.

  Therefore, the crushing unit 30 is rotated by the internal gear 45 rotated by the pinion gear 20 by rotating the pinion gear 20 by the rotation of the drive shaft 6. The speed difference of the revolution of the crushing part 30 with respect to the rotation of the drive shaft 6 is determined by the gear ratio between the internal gear 45 and the pinion gear 20.

  The eccentric portion 7 of the drive shaft 6 is provided with a counterweight 46 having a predetermined weight. The counterweight 46 is disposed in the anti-eccentric direction of the eccentric portion 7 and is provided so as to protrude in the direction opposite to the eccentric direction. The counterweight 46 balances the vibration to the drive shaft 6 when the grinding unit 30 vibrates at a predetermined vibration acceleration as will be described later. The eccentric portion 7 of the drive shaft 6 is a vibrator portion that gives a predetermined vibration acceleration to the crushing portion 30, and gives a predetermined vibration acceleration to the crushing portion 30 as will be described later.

  Furthermore, a weight casing 47 that covers the periphery of the counterweight 46 is provided on the support portions 31 and 32. The weight casing 47 is formed in such a size that the counterweight 46 can freely rotate. The weight casing 47 and the cylindrical portion 34 have a divided structure in which a structure that can be divided into a plurality of parts for attachment to the drive shaft 6 is connected by a bolt 48, but this divided structure is an example.

  Next, the pulverization process by the vibration mill 1 will be described. According to the vibration mill 1, first, the drive shaft 6 is rotated to rotate the pulverizing unit 30 at a predetermined rotational speed. Then, the workpiece W and the grinding media X are fed into the cylindrical portion 34 of the grinding unit 30 from the charging chute 10 with the grinding unit 30 in a high centrifugal force field. As the grinding media, for example, spheres such as SUS, alumina, and zirconium are used.

  As shown in FIGS. 2 (a) and 2 (b), as described above, the workpiece W and the pulverization media X that are put inside the cylindrical portion 34 are separated by the pulverization unit 30 that has a high centrifugal force field. In this state, the cylindrical portion 34 is stuck to the inner surface of the crushing wall 39. Since the cylindrical portion 34 vibrates at a vibration acceleration G2 larger than the centrifugal force G1 in the high centrifugal force field, the workpiece W and the pulverization media X are momentarily floated from the inner surface of the cylindrical portion 34 by the vibration acceleration G2. After that, it is struck against the inner surface of the crushing wall 39 of the cylindrical portion 34 by a large centrifugal force G1, so that the workpiece W is crushed by crushing by the collision and colliding with the crushing media X.

  In addition, when the drive shaft 6 is rotated at a high speed and is vibrated at a high frequency, for example, when it is vibrated at 3600 rpm, it is struck against the crushing wall 39 as many times as 3600 times per minute and the crushing is repeated. It is possible to finely pulverize the workpiece W in a short time within the 30 cylindrical portions 34.

As an example of the acceleration of the pulverizing unit 30 and the vibration acceleration of the pulverizing unit 30, for example, if the outer diameter of the pulverizing unit 30 is about 500 mm and the rotation speed is 720 rpm, the centrifugal force G1 on the wall surface of the cylindrical portion 34 Is about 145G with respect to the standard gravitational acceleration G (G = 9.8 m / s ² ), the eccentric amount of the drive shaft 6 is about 10 mm, and the rotational speed is 3600 rpm, the vibration acceleration G2 is the standard gravitational acceleration G (G = 9.8 m / s ² ), the vibration acceleration G can be increased by a difference of 5 G. The vibration acceleration G causes the workpiece W to vibrate in the radial direction in a high centrifugal force field. And can be crushed.

  The relationship between the acceleration inside the cylindrical portion 34 (centrifugal force field) of the pulverizing portion 30 and the acceleration that vibrates the cylindrical portion 34 is an important factor, and depends on the object to be processed, the processing amount, the processing time, etc. Accordingly, the optimum acceleration is set.

  In addition, the workpiece W and the grinding media X in the cylindrical portion 34 are floated at a vibration acceleration of about 150 G in a high centrifugal force field where about 145 G acts on the inner surface of the grinding wall 39 of the cylindrical portion 34 as described above. After that, the workpiece W in the cylindrical portion 34 whose upper and lower ends are reduced in diameter by the upper reduced diameter portion 35 and the lower reduced diameter portion 36 falls down due to gravity during the pulverization process. Without being crushed in the cylindrical portion 34.

  According to the vibration mill 1 as described above, a high centrifugal force field is generated in the crushing wall 39 portion of the cylindrical portion 34 that rotates at a high speed, and further, a high vibration acceleration speed in the radial direction of the cylindrical portion 34. Since vibration is generated, the collision energy applied to the workpiece W can be maximized, the workpiece W can be pulverized more finely in a shorter time than in the past, and the pulverized material can be mass-produced in a shorter time. It becomes possible.

  For example, the pulverization efficiency of a vibrating ball mill that vibrates in a gravitational field is higher than the pulverization efficiency of a conventional cylindrical ball mill that pulverizes in a conventional gravitational field. According to the vibration mill 1 that vibrates in a centrifugal force field, a finer pulverized product can be produced in a shorter time than the pulverization efficiency by the above.

  In addition, since the pulverized workpiece W is discharged, the centrifugal force in the radial direction can be reduced by reducing the rotational speed of the drive shaft 6, so that the lower diameter of the cylindrical portion 34 is reduced by gravity in the vertical direction. It can be dropped and discharged from the lower opening 34b of the portion 36. Therefore, by controlling the rotational speed control of the drive shaft 6 (eccentric portion 7), the input control of the workpiece W, and the pulverization time, the pulverization process is performed batchwise or continuously to continuously process the workpiece W. It is possible to produce a large amount of fine powder by finely pulverizing, and it is possible to improve the pulverization ability and shorten the pulverization time.

  In addition, when the workpiece is discharged, the workpiece W and the grinding media X can be separated at the outlet portion by disposing a mesh material having an opening smaller than the grinding media at the outlet portion. The separation of the grinding media X may be performed after discharging.

  In addition, the workpiece W and the grinding media X in the cylindrical part 34 are held on the inner surface of the grinding wall 39 of the cylindrical part 34 by centrifugal force during high-speed rotation, so that even in the gas, in the liquid Even in such a state, the pulverization process can be performed in a state where the workpiece W and the pulverization medium X are held on the pulverization wall 39 of the cylindrical portion 34. For example, the pulverization process is performed in an inert gas or an alcohol liquid. By doing so, it is possible to easily cope with an operation in which pulverization processing is performed in order to promote and suppress reaction by pulverization of the workpiece. Moreover, continuous batch processing becomes possible, and the vibration mill 1 at a practical level capable of mass-producing fine powder can be configured.

  FIG. 3 shows a vibration mill 50 according to the second embodiment. The vibration mill 50 of this embodiment is an example in which the crushing part 30 in the first embodiment is supported only by the upper part and the lower part is a free end. The same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, in the vibration mill 50 of this embodiment, the drive shaft 53 and the pulverization unit 30 are supported by an upper support plate 51 provided on the upper portion of the cylindrical casing 3. The upper support plate 51 is provided with an anti-vibration support portion 52, and the grinding portion 30 is supported along with the drive shaft 53 via the anti-vibration support portion 52.

  The anti-vibration support portion 52 includes anti-vibration rubbers 54 and 55 provided on the upper support plate 51 and a support block 56 provided on the upper surface of the anti-vibration rubbers 54 and 55. A plurality of anti-vibration rubbers 54 and 55 are provided radially with respect to the axis of the drive shaft 53. In this embodiment, a rubber spring is used to suspend and support the support block 56. The vibration isolating support portion 52 and the upper support plate 51 are sealed with a seal material 59. The support block 56 has a through hole 57 through which the drive shaft 53 passes in the center, and the same labyrinth seal 23 as that in the first embodiment described above is provided between the upper end of the through hole 57 and the drive pulley 13. It has been.

  Further, a flange portion 58 is formed at the upper end of the support block 56, and the flange portion 58 is vibration-proof supported by the upper support plate 51 with the vibration-proof rubbers 54 and 55. The left anti-vibration rubber 54 shown in the figure is fixed to a predetermined position of the upper support plate 51 and positions the support block 56. The pinion gear unit 16 is attached to the support block 56 with bolts 15.

  Furthermore, in this embodiment, the lower surface of the lower support portion 32 at the lower end portion of the drive shaft 53 is closed to prevent the pulverized workpiece from entering the lower support portion 32 and the like. Further, in this example, the lower portion of the casing 3 is closed by the pulverized material receiver 60, and the pulverization unit 30 is hermetically sealed.

  Since other configurations are the same as those of the first embodiment described above, the same reference numerals are given to the same configurations, and detailed descriptions thereof are omitted.

  According to the vibration mill 50 of the second embodiment as described above, as in the vibration mill 1 of the first embodiment described above, a larger vibration acceleration is provided inside the cylindrical portion 34 of the pulverizing portion 30 that becomes a high centrifugal force field. , The workpiece W can be finely pulverized in a short time with high acceleration in a high centrifugal force field.

  In addition, according to the vibration mill 50 of this embodiment, the cylindrical portion 34 that rotates at high speed, the eccentric portion 7 that is the vibration generating portion, the counterweight 46, and the like are integrally supported in an antivibration manner. The posture change of the drive shaft 53 and the cylindrical portion 34 due to the unbalance of the grinding media X can be returned to the original by the automatic alignment function, and transmission of vibration generation to the outside can be suppressed.

  As described above, according to the above-described vibration mills 1, 50, the workpiece W is subjected to a vibration acceleration G larger than the centrifugal force on the inner surface of the grinding wall 39 of the cylindrical portion 34 of the grinding portion 30 that becomes a high centrifugal force field. And the grinding media X are lifted from the grinding wall 39 and then repeatedly collided with the grinding wall 39 by the centrifugal force of the high centrifugal force field, so that the object to be treated can be crushed very finely by the collision. Time can be greatly reduced.

  Moreover, according to the vibration mills 1 and 50 described above, it is possible to use either dry pulverization in an inert gas or the like, or wet pulverization in an alcohol liquid or the like, in addition to the atmosphere, such as prevention of oxidation and deterioration. It is possible to carry out fine pulverization in a short time to suppress the reaction or promote the reaction.

  Furthermore, by optimally setting the acceleration acting on the cylindrical part 34, for example, in the case of wood flour, saccharification is promoted by grinding to 20 microns or less, and a high molecular weight carbohydrate such as cellulose is obtained. It is also possible to easily utilize biomass resources that cause a reaction to change to a low molecular weight saccharide by the action of an acid or an enzyme.

  In the above embodiment, the example in which the workpiece W is pulverized with the pulverization medium X has been described. However, since the workpiece W is pulverized with a very large acceleration G as described above, it may be a hard workpiece W. For example, only the workpiece W may be placed inside the cylindrical portion 34 and pulverized by its own collision, and the pulverizing media X is not necessarily limited to the configuration that requires it.

  Moreover, as the to-be-processed object W mentioned above, various to-be-processed objects, such as a mineral, a chemical product, an organic substance, and a waste, can be grind | pulverized.

  Furthermore, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

  The vibration mill according to the present invention can be used, for example, as a mill for production equipment that wants to produce a large amount of fine powder obtained by finely pulverizing a workpiece in the mechanochemical field.

1 Vibration mill
3 Casing
4 Upper support plate
5 Lower support frame
6 Drive shaft
7 Eccentric part
8 Upper support bearing
DESCRIPTION OF SYMBOLS 9 Lower support bearing 16 Pinion gear unit 20 Pinion gear 30 Crushing part 31 Upper support part 32 Lower support part 33 Stay 34 Cylindrical part 34a Upper opening 34b Lower opening 35 Upper diameter reduction part 36 Lower diameter reduction part 37 Upper bearing unit 38 Lower bearing unit 39 Crushing wall 45 Internal gear (internal gear)
46 Counterweight 50 Vibration Mill 51 Upper Support Plate 52 Anti-Vibration Support Portion 53 Drive Shaft 54,55 Anti-Vibration Rubber 56 Support Block 58 Flange V3 Eccentricity G1 Acceleration G2 Vibration Acceleration
W Workpiece
X grinding media

Claims (8)

A vibration mill comprising a drive shaft that is supported rotatably in a vertical orientation, and a pulverizing section that is rotated around the drive shaft by the drive shaft,
The drive shaft includes an eccentric portion that is eccentric with respect to the axis of the drive shaft, and a counterweight that is disposed in a direction opposite to the eccentric portion,
The eccentric portion has a support portion that rotatably supports the pulverization portion,
The drive shaft has an external gear that rotates around the axis of the drive shaft;
The crushing unit is loaded with an internal gear that meshes with an external gear of the drive shaft and revolves the crushing unit around the drive shaft, a vertical crushing wall positioned around the drive shaft, and an object to be processed And a cylindrical part having an upper opening.   The cylindrical portion has an upper diameter-reduced portion having an upper end that is reduced in diameter upward and the upper opening at the upper end, and a lower diameter-reduced portion having a lower end that is reduced in diameter downward and a lower opening at the lower end. The vibration mill according to claim 1.   3. The vibration mill according to claim 1, wherein the pulverizing unit is configured to pulverize the object to be processed by introducing a pulverization medium together with the object to be processed.   The vibration mill according to any one of claims 1 to 3, wherein the support portion is disposed at a longitudinal intermediate portion of the cylindrical portion and a lower portion of the cylindrical portion.   The vibration mill according to any one of claims 1 to 4, wherein the drive shaft has a both-end support structure in which an upper portion and a lower portion are supported by support bearings.   The anti-vibration support part which anti-vibrates and supports the upper part of the said drive shaft is provided, The pulverization part was suspended with the said drive shaft by this anti-vibration support part, and it comprised so that anti-vibration support might be carried out. The vibration mill according to item.   7. The vibration mill according to claim 6, wherein the anti-vibration support portion is configured to suspend and support an upper portion of the drive shaft with an anti-vibration rubber arranged radially with respect to the drive shaft axis.   The vibration mill according to any one of claims 1 to 7, further comprising a casing for sealing the periphery of the pulverization unit.