JPS58214349A - Super-pulverizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrafine pulverizer in which the particle size of the pulverized product is several microns.

An example of a conventionally used pulverizer for ultrafine pulverization on the order of several microns will be outlined with reference to FIGS. 1 to 4. As shown in FIG. 4, the rotor 2 has an upright cylindrical shape having a large number of protrusions along the generatrix line on its outer surface, and has a large number of protrusions 3 on its inner surface along the generatrix line as shown in FIG. As shown in FIGS. 1 and 2, the stator 4 having a cylindrical inner surface shape corresponding to the child 2 is a stator 4 that is fitted with a predetermined gap Sr between the surfaces of the respective protrusions 1 and 3. There is. The upper and lower end surfaces of the rotor 2 are closed by an upper plate 5 and a lower plate 6, respectively. It is fixed to the upper end of a vertical shaft 9 which is rotatably driven. The upper and lower ends of the stator 4 are provided with an upper casing 10 and a lower casing 11' spaced apart from the upper plate 5 and lower plate 6, respectively.
It is published in an airtight manner. Lower surface plate 6 and lower casing J, 1. ! : A raw material supply pipe 14 provided between the raw material supply port ( ) 3 opens into the space 12 surrounded by the sumo wrestler face plate 5 and the upper casing lO. is provided with a product discharge port 16. Raw materials are fed into the raw material supply port 13 from a raw material feeder (not shown), and a discharge pipe (not shown) is connected to the product discharge port 16; A product ejection means such as a blower is provided.

Therefore, the raw material is input into the raw material supply port 13 while rotating the white rotor 2'f at high speed by the drive motor, and the product discharge blower is driven 9, and the raw material passes through the space In with air and is fixed to the rotor 2. It is introduced into the annular space between the rotors 4, is accelerated in the circumferential direction by the protrusions 1 of the rotor 2 rotating at high speed, collides with the protrusions 1 and 3 of the rotor 2 and the stator 4, and is pulverized. However, it gradually rises on the upward airflow generated by the negative pressure from the exhaust blower, passes through the space 15, and is discharged from the exhaust port 16 along with the wind.

In the above example, the outer surface of the rotor 2 and the inner surface of the stator 4 have a cylindrical shape, but they may also have a rotating body shape such as a truncated cone shape.

Now, in conventional crushers of the above type, the protrusions on both the rotor and stator are usually made of cast steel, cast iron, etc., integrally with the main body, as in crushers with large product particle sizes. Cast steel has excellent impact resistance and is suitable for crushing machines with relatively large product particle sizes, where large-grain raw materials collide, but due to its low wear resistance, it is suitable for crushing machines such as ultra-fine crushers. When a raw material with a fine particle size collides with the protrusions and is crushed, it becomes as if it were covered with sand plastic, and the ridge corners of the protrusions that contribute to the pulverization wear out in a short period of time. When this part is worn out, the particle size of the pulverized product will vary; for example, if the product is used as a powder for cosmetics, it will become rough and lose its commercial value when applied to the skin. Classifying ultrafine powder of several microns is extremely difficult and costly, so it is highly desirable to produce products with uniform particle sizes using a single pulverizer.

This invention solves the above-mentioned problems of the conventional ultrafine pulverizer of the above-mentioned type, and even when ultrafine pulverization of several microns is performed, there is little wear on the protrusions on the rotor and stator, and it lasts for a long time. It is an object of the present invention to provide an ultrafine pulverizer that can produce stable and good pulverized products, has a long service life of its protrusions, and is easy to maintain and inspect.

Hereinafter, the present invention will be explained in detail with reference to drawings showing embodiments thereof.

FIG. 5 is a longitudinal sectional view showing an embodiment of the ultrafine crusher according to the present invention, and as is clear from the figure, the configuration is generally the same as the first
Although it is almost the same as the conventional ultrafine crusher shown in the figure, the rotor 20 and stator 30 are axially arranged in multiple stages of annular members 21 and 31V, respectively. - The annular members 21 and 31 are each laminated and arranged at appropriate pitches on the circumference by stay bolts 22 and 32.
They are physically connected.

Further, the protrusions 33 and 23 of the stator 30 and the rotor 20 are fixed to the stator 31, as shown in FIGS. 6 and 7. It is made as a separate member from the rotor body 21, and is removably fitted and fixed in fitting grooves 34, 24 provided in the rotor body 21. The stator body 31 and the rotor body 21 are made of structural steel, cast steel, or cast iron, and the n1 protrusions 33 and 23 are made of ceramic with excellent wear resistance.

The above-mentioned ceramic protrusions 33 and 23 are annular members 31 of each layer of the stator and rotor, which are divided in the axial direction.

21, and by attaching these to each annular member 31, 21 and stacking them together, the protrusions 33, 23 extend over the entire length of the stator 30 and rotor 20. Forms ridges that are connected to each other.

Convex 23. ．． 33, rotor or stator main body annular member 21
In the example shown in FIGS. 6 and 7, the method of fitting and fixing at 31 is to form the protrusions 23, 33' to have a trapezoidal cross section, and insert the fitting grooves 24, 34 provided in the permanent members 21, 31. The cross-sectional shape is a trapezoid that corresponds to the shape from the longer base of the trapezoid to a certain height. As a result, the protrusion 2333
can be fixedly attached to the main body by fitting in the axial direction from one end of the groove 24.34.

Furthermore, as shown in FIG. 8, the cross sections of the protrusions 23 and 33 are rectangular, and the grooves provided in the grooves 21 and 32 are also rectangular in cross section with the same width. It is also possible to move the entire protrusion so that it fits into the groove, and then fix both ends of the protrusion with a stepped presser member 35 made entirely of ceramic using a presser plate bolt 36 and remove it.

In the example shown in FIG. 9, the main body 31 is provided with an interposed trapezoidal groove 34 as shown in FIG. A flange 33a is provided that extends from side to side along the line. FIG. 10 shows the method of fitting and mounting shown in FIG. 8 by introducing the concept shown in FIG. 9.

Moreover, as shown in FIG. 11, a mounting groove 34 provided in the main body 3J
The cross-sectional shape is a single character shape that widens at the back, and the protruding strip 33
It is also possible to make the cross section into a shape of a gold mark and fit them together.

There is no difference from the conventional device except that the rotor 20 and the stator 30'j are divided into five axial directions as described above, and that they are separate members from the entire body of the protrusions and are made entirely of ceramic.

Therefore, the grinding process is exactly the same as the conventional device detailed above. However, even if the protrusions 23 and 33 of the rotor 20 and stator 30 are constantly exposed to the blast of the pulverized raw material during the grinding process, the protrusions are made of ceramic with excellent wear resistance, so they will last for a long time. There is only slight wear, which enables good ultrafine pulverization with little variation in particle size, and also improves the life of the protrusions.

After a certain period of operation, when carrying out maintenance inspections and replacing worn protrusions, the rotor and stator are divided into several layers in the axial direction, which makes handling easier, and the length of the protrusions is also short. This reduces the chance of breakage of protrusions made of brittle ceramic during transportation and assembly. Even if it were to break, the damage would be less than if the entire length were made in one piece. From the viewpoint of preventing breakage accidents, a cross-sectional shape with flanges on the left and right sides as shown in FIGS. 9 and 1o is advantageous in terms of large bending and shear strength.

Note that although FIGS. 8 to 10 show an example of how the protrusions are attached to the stator, the attachment of the protrusions to the rotor is the same, so illustration is omitted.

As described above, according to the present invention, the grinding performance of the ultrafine grinder is stabilized over a long period of time, contributing to the improvement of product quality, and the life of the grinding part of the grinder is extended, making maintenance inspection and parts replacement unnecessary. Various effects can be obtained, such as making it easier.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an example of a conventional pulverizer, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a perspective view showing a part of the stator, and Fig. 4 Figure 5 is a perspective view showing a part of the rotor, Figure 5 is a longitudinal sectional view showing an embodiment of the pulverizer according to the present invention, Figure 6 is a perspective view showing part of the stator,
FIG. 7 is a perspective view showing a part of the rotor, and FIGS. 8 to 11 are perspective views showing other embodiments of the coverage force of the protrusions on the stator. 20... Rotor 21... Rotor body 23.
...Convex strip 30...Stator 31...Stator body 33...Convex strip 5th Fig. 9 Itto Fig. 11 Fig. 10

Claims (2)

[Claims] (1) A rotor with a rotor shaped metal having a large number of protrusions along the generatrix on its outer surface is rotatably supported on a machine frame so as to be rotatable around a vertical axis, and has a large number of protrusions along the generatrix on its inner surface. A stator having an inner surface shape corresponding to the rotor is fitted in such a way that the surface of its protrusions is spaced a certain distance from the surface of the protrusions of the rotor, and the stator is placed between the rotating rotor and the stationary stator. In the ultra-fine grinding machine that crushes the pellets using the protruding stripes described above, the protruding strips are removable from the rotor body and the stator body, and the material thereof is made of ceramic. An ultra-fine grinder featuring: (2) The rotor and stator described above are each divided into a plurality of layers in the axial direction, and these layers are all laminated and joined together,
2. The ultrafine pulverizer according to claim 1, wherein the protrusions are divided and attached to each layer of the rotor and stator at different heights.