JPS591092B2 - Rotating crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a crusher for crushing lumps such as rocks or ores;
In particular, the present invention relates to improvements in a rotary crusher in which the mantle rotates eccentrically within a cone cave.

A rotary crusher with a conical cylindrical cone cave and a mantle that performs an eccentric rotation movement inside the cone cave is well known as a cone crusher. The throw is increased the further down you go.

That is, to explain this with reference to an example, Fig. 1 shows a typical example of a conventional cone crusher, and as shown in the figure, a cone cave 1 of a conical cylinder body and a cone crusher that performs an eccentric rotation movement inside the cone cave 1 are shown. With the mantle 2, the crushing chamber 3
In the process of falling through the crushing chamber 3, the rock or other mass supplied to the crushing chamber 3 is repeatedly subjected to a compressive load due to the rotational movement of the mantle 2, and is repeatedly crushed and crushed by the mantle 2. When the particle size or size is approximately equal to the gap between the outlet opening 4 regulated by the cone cave 1 and the particle size, the particles are discharged from the machine through the outlet opening 4. As shown in the figure, the mantle center line M and the cone cave center line C have an intersection point o above the crusher, and both center lines M and C are designed so that the distance between them increases as they get below the crusher, and eventually the crusher The lower the chamber 3, the greater the throw.

Setting such a throw is the easiest from a mechanical standpoint, and the crushing method in conventional crushers of this type is a non-layer compression type, that is, the state inside the crushing chamber 3 is a single particle compression crushing type. , it can be said that this is a reasonable slow change. In other words, the throw is increased toward the bottom of the crushing chamber 3 where the gap becomes smaller, increasing the falling distance of the mantle 2 per rotation, and undesirable packing and yoking phenomena that tend to occur below the crushing chamber 3 are increased. It is effective in that it enables prevention of phenomena. However, even if the cone crusher is a cone crusher, such a change in throw is not necessarily preferable in a cone crusher of a layer compression type which is different from the conventional non-layer compression type.

In other words, the layer compression type cone crusher was previously proposed by the present applicant as an alternative to the conventional non-layer compression type cone crusher. , the gap between the outlet opening 4 of the crushing chamber 3 and the mantle 2 rotating in the cone cave 1 is set to a range of 0.025 to 0.05 of the length of the crushing chamber 3, or The eccentric momentum of the mantle 2 is set to 0.015 to 0.03 of the diameter of the mantle 2, and the eccentric momentum of the mantle 2 is set to 0.05 to 0.03 of the length of the crushing chamber 3.
1 or the diameter of the mantle 2, from 0.03 to 0.
．． 06 range, and by continuously supplying and crushing the material to be crushed so that the material to be crushed is in a consolidated state in the crushing chamber 3, the crushed rocks, etc., are crushed in the crushing chamber 3. The material is compressed and crushed while remaining in layers. In such a layer compression crushing type cone crusher, it is necessary to secure the amount of rock necessary to sufficiently compress the layers of particles at the bottom of the crusher.
If the upper throw is smaller than the lower throw as in the past, there is a risk that a sufficient amount cannot be secured, and the layer compression crushing effect in the consolidated state cannot be fully exerted. It is desirable to make the load distribution in the crushing chamber 3 as uniform as possible under the soil and give the crusher the maximum power load, but for this purpose, it is disadvantageous that the upper slot of the crushing chamber 3 is small. Furthermore, it is necessary to subject the raw material to sufficient layer compression and crushing before it reaches the small part of the gap below the crushing chamber 3, and in this respect as well, it is undesirable for the slot on the positive side of the crushing chamber to be small.

The present invention improves the slot change in the cone crusher of the prior art, and makes it possible to fully utilize the characteristics of the layer compression type cone crusher in particular. In a rotary crusher in which a mantle eccentrically rotates within a cone cave, the mantle is moved so that its axis moves in a single hyperbolic rotation plane centered on the vertical axis of the cone cave, and the minimum diameter of the single hyperbolic rotation plane is The latitude circle is located at a position of 0.3 to 0.65 from the lowest end of the cone cave with respect to the total height of the cone cave. The present invention will be described in detail below based on the illustrated embodiments. Fig. 2 (1) is a vertical sectional side view of the main part of the cone crusher of the present invention, and Fig. 2 (H) is a vertical sectional side view of the cone crusher of the present invention.
Although the line cross section is shown, 1 is a cone cave with a conical cylindrical shape, and 2 is a mantle. Although the shape of both may be the same as that of FIG. 1, in the present invention, it is clear from both figures. As shown in FIG. and the latitude circle of the minimum diameter of the single hyperbolic rotation surface is located at a position within the range of 0.3 to 0.65 from the lowest end of the cone cave 1 with respect to the total height of the cone cave 1. 3 indicates the crushing chamber, and 4 indicates its outlet opening.

According to the present invention, the mantle 2 is connected to its center axis M, compared to the conventional structure in which the intersection of the two center lines M and C is located at the crusher soil force, and the distance between the two increases as it goes downward. However, by moving the single hyperbolic rotating surface soil around the vertical axis C of the cone cave 1, it was found that the axis M of the mantle 2 and the axis C of the cone cave 1 had no intersection at all. And because it is a single hyperbolic surface of revolution, the slot is the minimum (but not zero) at the latitude circle with the smallest diameter, and the slot becomes larger upward and downward, so the slot above it is This makes it possible to secure a sufficient amount of rock necessary for layer compression crushing between particles at the bottom of the crushing chamber 3, and as mentioned above, the minimum diameter of the latitudinal circle can be By locating the crusher in the approximately central region of the crusher, the slots on both the upper and lower sides can be made to have the same level of difference, thereby making it possible to equalize the load distribution in the upper and lower parts of the crushing chamber 3 and giving the maximum power load to the crusher. It is also possible to apply sufficient compression and crushing to the raw material until it reaches the small part of the gap at the bottom.

And since the smallest part of the slot is approximately in the center,
The upper slot is large, and the lower slot is significantly smaller in comparison, so that there is no packing or tying in the lower part, and a sufficient amount of rock is supplied from the soil part of the crushing chamber 3, and the rock is crushed while reaching the lower part. While the particle group is packed in a compacted state, layer compression crushing between the particles due to the rotation of the mantle 2 proceeds extremely effectively, and the characteristics of layer compression type crushing can be fully demonstrated, and the grains are Crushed stone products with excellent shapes can be obtained with high efficiency. Of course, the structure of the present invention can be expected to have certain effects even when applied to a conventional non-layer compression type cone crusher.

[Brief explanation of drawings]

Figure 1 is a side sectional view of the main part of an example of a conventional cone crusher.
FIG. 2 is a sectional view of each main part of an embodiment of the cone crusher of the present invention. 1... Cone cave, 2... Mantle, 3... Crushing chamber, 4... Outlet opening, C... Cone cave center line, M・・・・・・Mantle center line, C・・・・・・Intersection.

Claims (1)

[Claims] 1. In a rotary crusher in which the mantle eccentrically rotates in a cone cave with a vertical axis, the mantle is moved so that its axis moves on a single hyperbolic rotation plane centered on the vertical axis of the cone cave, and A rotary crusher characterized in that the latitude circle of the minimum diameter of the hyperbolic rotating surface exists at a position of 0.3 to 0.65 from the lowest end of the cone cave with respect to the total height of the cone cave.