JPH035855B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mantle for a rotary crusher such as a gear crusher or a cone crusher.

[Prior Art] The mantle of a rotary crusher works in conjunction with a cone cave to crush the material to be crushed. Conventionally, taking a gyratory crusher as an example, the mantle is configured as shown in Fig. 3. ing.

1 in the figure is the upper frame in the shape of a truncated inverted conical tube.
The upper frame 1 includes a plurality of (two in Fig. 3)
The frame 1a and 1b are arranged in series, and are arranged in series on the upper part of a lower frame 2 placed on a pedestal (not shown).

A sleeve 4 having an eccentric shaft hole 3 penetrating in the vertical direction is rotatably fitted into the boss portion 2a of the lower frame 2, and a sleeve 4 is rotatably inserted into the eccentric shaft hole 3. The lower end of the main shaft 5 is inserted through the main shaft 5. The lower end of the main shaft 5 is supported by a lower bearing 6 such as a thrust bearing.
is supported by a piston 8 of a hydraulic cylinder 7 for lifting and lowering the main shaft connected to the lower end of the boss portion 2a of the lower frame 2. The upper end of the main shaft 5 is supported by an upper bearing 9 such as a radial spherical bearing.
is the rim 10 attached to the upper end of the upper frame 1.
It is supported by a spider 11 that is integrated with.

The main shaft 5 has a truncated conical mantle core 12.
is integrally provided facing the inner peripheral surface of the upper frame 1, and a truncated conical mantle 13 made of high manganese cast steel is fitted into the mantle core 12. On the other hand, in order to form a cone cave 14 on the inner circumferential surface of the upper frame 1, a large number of cone cave segments 14a made of high manganese cast steel in the shape of an inverted trapezoid are arranged with appropriate clearances between each other and with a back-up material 15. They are installed in multiple rows and stages in a staggered pattern. A crushing chamber 16 having a wedge-shaped hollow cross section is formed between the cone cave 14 and the mantle 13.

A driven bevel gear 1 is attached to the lower end of the sleeve 4.
7 is attached to the driven bevel gear 17, and a driving bevel gear 19 attached to the inner end of the horizontal rotating shaft 18 is meshed with the driven bevel gear 17. The horizontal rotating shaft 18 is supported by a casing 20 attached to the lower frame 2 via a bearing 21, and the outer end of the horizontal rotating shaft 18 is connected to an electric motor (both not shown) via a belt. A pulley 22 is attached.

In order to crush an object to be crushed (not shown) using the tire recycling crusher configured as described above, the electric motor is activated to rotate the sleeve 4 and the crushing chamber 16 is rotated.
The material to be crushed is put into the As the sleeve 4 rotates, the lower end of the main shaft 5 makes an eccentric rotation movement due to the action of the eccentric shaft hole 3, and the object to be crushed falls while being compressed and crushed one after another due to the change in the gap between the cone cave 14 and the mantle 13. Then, it becomes a crushed product and goes to the crushing chamber 1.
6 and then fall and are discharged out of the machine from the discharge port of the lower frame 2.

[Problems to be Solved by the Invention] However, according to the above-mentioned conventional rotary crusher, the crushing surface of the mantle 13 is formed in a smooth conical shape. 14, it is easy to slip in the circumferential direction, the falling speed is high, and the number of shot passes increases, and the crushing time between the mantle 13 and the cone cave 14 of the object to be crushed,
Since the kneading time is shortened, there is a problem that the grain shape of the crushed product becomes flat.

In addition, when performing a chiyork operation, since the crushing surface of the mantle 13 is formed into a smooth conical shape, the falling speed increases, and the lower part of the crushing chamber 16 is likely to become overcrowded, so that a packing phenomenon occurs. In addition to being unable to operate stably,
Mantle 13, corn cave 14 due to uneven wear
There is a problem that the lifespan of the product is shortened.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a mantle for a rotary crusher that improves the particle shape of crushed products, enables stable chuck operation, and extends the life of the crusher.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a mantle for a rotary crusher that cooperates with a cone cave to crush objects to be crushed. A large number of concave portions are formed in multiple rows at appropriate intervals in the circumferential direction, diagonally facing the front lower side in the turning direction, and continuing intermittently.

[Function] According to the above means, the material to be crushed placed between the mantle and the concave is prevented from slipping in the circumferential direction with a part of the material entering the recess of the mantle, while being prevented from slipping in the mantle on both sides of the recess. It is compressed and crushed between the crushing surface of the cone cave and the crushing surface of the cone cave.

In addition, the objects to be crushed fall intermittently and spirally with some of them entering the recesses of the mantle.
As the falling distance becomes longer, the falling speed is suppressed.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

FIGS. 1 and 2 are a half-cut plan view and a front view of the mantle of the tire retraction crusher, and the smooth fractured surface (outer peripheral surface) of the mantle 30 in the shape of a truncated conical tube made of high manganese cast steel. 31, a large number of rectangular recesses 32 are formed in multiple rows at appropriate intervals in the circumferential direction, diagonally extending forward and downward in the direction of rotation of the mantle 30 during crushing (in the direction of the arrow in the figure). has been done. Each recess 32 is formed by the mantle 3
They are provided in a rectangular shape in the vertical direction from near the top to near the bottom of the 0, and each width is set appropriately smaller than the particle size of the desired crushed product.

When the object to be crushed is crushed by the gear recycling crusher having the mantle 30 having the above configuration, a part of the object to be crushed is charged into the crushing chamber 34 between the mantle 30 and the cone cave 33 (see Fig. 2). While being prevented from slipping in the circumferential direction while entering the recess 32 of the mantle 30, the crushing surface 3 of the mantle 30 on both sides of the recess 32 is reduced by reducing the gap in the crushing chamber 34 due to the eccentric rotation movement of the mantle 30.
1 and the crushing surfaces of the cone cave 33 and are compressed and crushed. Furthermore, as the gap in the crushing chamber 34 increases due to the eccentric rotation movement of the mantle 30, the objects to be crushed fall intermittently and spirally with some of them entering the recess 32 of the mantle 30, and the falling distance increases. As the length increases, the falling speed is suppressed.

In the above embodiment, each recess 32 has a rectangular shape, but the shape is not limited to this, and the shape may be a circle, an ellipse, a triangle, an inverted trapezoid, a cross or any other shape, and the size of each recess 32 may be changed. The height is not limited to the same value, but may be gradually decreased from the top to the bottom.

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained compared to the prior art.

(1) A part of the object to be crushed enters the recess and is prevented from sliding in the circumferential direction, so that crushing can be performed reliably.

(2) Part of the object to be shredded falls intermittently and spirally into the recesses of the mantle, and the falling distance becomes longer and the falling speed is suppressed, reducing the amount of crushing that the object receives. The time and kneading time are increased, and as a result, flat crushed products are eliminated, and the particle shape can be significantly improved.

(3) Also, since the falling speed of the material to be crushed is suppressed,
Together with the presence of the recesses, the material to be crushed is filled with appropriate voids in the crushing chamber, and there is no packing phenomenon caused by overcrowding at the bottom of the crushing chamber, enabling stable cheese operation. Since uneven wear is reduced, the life of the mantle and cone cave can be extended.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a half-cut plan view and a front view of a mantle of a tire retractor according to an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of a conventional tire retractor equipped with a mantle. It is. 30... Mantle, 31... Fractured surface, 32...
Recess, 33... corn cave.

Claims (1)

[Claims] 1. In the mantle of a rotary crusher that works with a cone cave to crush materials, a large number of concave portions intermittently connected diagonally downward in the direction of rotation of the mantle are formed on the crushing surface of the mantle in a circular manner. A mantle for a rotary crusher, characterized in that multiple rows are formed at appropriate intervals in the circumferential direction.