JPH0412191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a crusher for crushing various minerals, various artificial raw materials such as ceramics, plants such as soybeans, etc., and hard materials such as stones and gravel.

BACKGROUND ART Conventionally, many types of crushers are known.
For example, crusher-type crushers such as geo crusher, cone crusher, roll crusher, impact crusher, and hammer crusher, as well as rod mills, ball mills, roller mills, impact mills, disc type mills, etc. Mill type crushers are well known.

Among such conventional crushers, in order to crush highly abrasive materials, stones, gravel, etc., recent crushers are equipped with a rotating shaft arranged horizontally, a disk fixed to one end of the rotating shaft, There are many types of crushers in use that are equipped with a large number of ceramic pins concentrically attached to a disk, and a casing that surrounds the disks and the ceramic pins.

In this type of pulverizer, conventionally, as a countermeasure against wear of the disk rotating at high speed, hardfacing welding or a plate-shaped ceramic member was provided as a cover on the surface of the disk. In particular, the outer periphery of the disc is subject to severe wear.
Countermeasures were considered important.

For example, in the past, a simple hexahedral ceramic plate was attached to the outer periphery of the disk using adhesive.

As shown in FIG. 1, a plurality of ceramic protection members 2 and 3 were provided on both sides of a disc 1, and a flat hexahedron 4 was pasted as a liner on the outer peripheral surface of the disc 1.

Problems to be Solved by the Invention When a liner having such a structure is provided on the outer periphery of the disk 1, there is a drawback that the contact area between the hexahedron 4 and the disk 1 is small. Moreover, when the disk 1 rotates, a centrifugal force acts on the hexahedron 4, but at that time, the hexahedron 4 is merely fixed to the outer circumference of the disk 1 by a tensile force.

As is well known, adhesives have a drawback in that their adhesive strength is not very strong against tensile forces.
Therefore, when the disk 1 is rotated at high speed, there is a risk that the hexahedron 4 provided as a liner on the outer periphery of the disk 1 will peel off.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide a crusher in which a ceramic liner provided on the outer periphery of the disk is firmly fixed.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention includes a rotating shaft arranged horizontally, a disk fixed to one end of the rotating shaft, a large number of ceramic pins attached concentrically to the disk, In a crusher equipped with a casing that surrounds the disk and the ceramic pin, the outer circumference of the disk has a convex or concave cross section, and has a concave or convex cross section corresponding to the cross section. The gist of the present invention is a pulverizer characterized in that a ceramic liner is fixed to the outer periphery of the disc with an adhesive.

Means for Solving the Problem The cross section of the outer circumferential portion of the disk 10 is formed into a convex or concave shape, and a ceramic liner 13 having a concave or convex cross section corresponding to the cross section is formed on the disk 10. Fix it on the outer periphery with adhesive. Ceramic protective members 11 and 12 are provided on both sides of the disc 10 as necessary.

Function When the disc 10 rotates at high speed, the ceramic liner 13 is subjected to centrifugal force, but at this time, since the cross section of the ceramic liner 13 is convex or concave,
The adhesive that holds it in place is subject to not only tensile forces but also shear forces. As a result, the ceramic liner 13 can be attached to the disc 1 due to a greater adhesive force than before.
It will be firmly fixed at 0.

Effects of the Invention According to this invention, the ceramic liner 13
Since the adhesive that fixes the ceramic liner 13 is subjected to not only tensile force but also shear force, the ceramic liner 13 is firmly fixed to the outer circumference of the disk 10 as a whole. As is generally known, the shear strength of adhesives is said to be about 8 to 10 times higher than the tensile strength. It is obvious how firmly it is fixed to the outer periphery of the plate 10.

Therefore, the effect of preventing peeling of the ceramic liner 13 is remarkable.

Embodiment Referring to FIGS. 2 to 5, an example of a pin mill will be described as a preferred embodiment of the crusher according to the present invention.

The rotating shaft 15 is arranged horizontally. A disk 10 is fixed to one end of this rotating shaft 15. The other end of the rotating shaft 15 is connected to a motor (not shown), and is configured to rotate in a predetermined direction at a desired rotational speed as necessary.

A large number of ceramic pins 16 are attached to the disk 10 concentrically. These ceramic pins 16 are arranged annularly in one or more rows at equal intervals. A casing 17 is provided to surround these discs 10 and ceramic pins 16. A large number of pins 18 are fixed alternately in an annular manner to the inner wall surface 17a of the casing 17 facing the disc 10.

Such a ceramic pin 16 on the disk 10 side
and a pin 1 fixed to the inner wall 17a opposite thereto.
8 to crush stones, gravel, etc.

The structure of the pulverizer described above can be substantially the same as that of the conventional one. Moreover, many other modified structures other than those described above can be employed.

Now, in this invention, the cross section of the outer circumferential portion 10a of the disk 10 is concave. The ceramic liner 13 has a convex cross-section corresponding to the cross-sectional shape of the outer peripheral portion 10a.
Thereby, the ceramic liner 13 is attached to the disc 1.
When fitted to the outer peripheral portion 10a of 0, they can come into close contact with each other.

As shown in FIG. 3, ceramic liners 13 having such a convex cross section are continuously and densely arranged all around the outer periphery 10a of the disk 10.

Each ceramic liner 13 is fixed to the disc 10 with adhesive. As the adhesive, organic resins such as epoxy resins are suitable.

Furthermore, plate-shaped ceramic protection members 11 and 12 are closely arranged on both sides of the disc 10. Thereby, except for the pin 16, the disk 10 is entirely covered by the ceramic protective members 11, 12 and the ceramic liner 13.

In the embodiment described above, the outer circumference 1 of the disk 10
Although the cross section of Oa is concave and the ceramic liner 13 has a convex cross section correspondingly, the present invention is not limited to such a shape. For example, the outer peripheral portion 10a of the disk 10
The same effect can be obtained by making the cross section of the ceramic liner 13 convex and correspondingly making the ceramic liner 13 concave in cross section.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing the cross-sectional shape of the outer periphery of a high-speed rotation disk provided in a conventional crusher, FIG. 2 is a schematic sectional view showing the internal structure of the crusher according to the present invention, and FIG. The figure is a schematic perspective view showing the outer periphery of the rotating disk and pins of the crusher shown in FIG. 2, FIG. 4 is a schematic side view showing the rotating disk and pins, and FIG. 5 is the same as that shown in FIG. It is a schematic sectional view along the XX line. 10... Disk, 11, 12... Ceramic protective member, 13... Ceramic liner, 15...
...rotating shaft, 16... pin, 17... casing.

Claims (1)

[Claims] 1. A crusher equipped with a rotating shaft arranged horizontally, a disk fixed to one end of the rotating shaft, a number of ceramic pins attached concentrically to the disk, and a casing surrounding the disk and the ceramic pins. In this step, the outer periphery of the disk is formed into a convex or concave cross-section, and a ceramic liner having a concave or convex cross-section corresponding to the cross-sectional shape is fixed to the outer periphery of the disk with an adhesive. A crusher characterized by: