JPH035856B2 - - 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, which is 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 mantle core 1 in the shape of a truncated conical tube.
2 is integrally provided facing the inner peripheral surface of the upper frame 1, and the mantle core 12 has a truncated conical mantle 13 made of high manganese cast steel.
is fitted. 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 an electric motor (both not shown) is connected to the outer end of the horizontal rotating shaft 18 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 convex portions are formed in a plurality of rows at appropriate intervals in the circumferential direction, diagonally facing the front lower side in the turning direction, and extending intermittently.

[Function] According to the above means, the material to be crushed placed between the mantle and the cone cave is partially penetrated between the convex portions of adjacent rows of the mantle, while being prevented from slipping in the circumferential direction. , and is crushed by compression and bending shear between adjacent rows of protrusions, the mantle fracture surface and the cone cave fracture surface between them.

Further, since the object to be crushed falls intermittently and spirally with a portion of the object entering between the protrusions of adjacent rows of the mantle, the falling distance becomes longer and 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 shows a direction in which the mantle 30 gradually decreases in size from the top to the bottom, and in which the mantle 30 turns during crushing (in the direction of the arrow in the figure).
A large number of hemispherical convex portions 32 are formed in multiple rows at appropriate intervals in the circumferential direction.

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 when the mantle 30 is inserted between the protrusions 32 in adjacent rows, the gap between the crushing chamber 34 is reduced due to the eccentric rotation movement of the mantle 30, and the protrusions 32 in the adjacent rows are It is sandwiched between the fracture surface 31 of the mantle 30 and the fracture surface of the cone cave 33 and is fractured by compression and bending shear. Further, 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 in a spiral manner with some of them entering between the protrusions 32 of adjacent rows of the mantle 30. The falling distance becomes longer and the falling speed is suppressed.

Note that in the above embodiment, the convex portions 32 in adjacent rows are made gradually smaller toward the bottom; however, the present invention is not limited to this, and for example, the convex portions in adjacent rows are
The height may be set in a staggered manner, and by doing so, it is possible to correspond to the surface shape of the object to be crushed whose particle size is two or more rows apart.

[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 between the protrusions of adjacent rows and is prevented from sliding in the circumferential direction, so that crushing can be performed reliably.

(2) Part of the object to be crushed falls intermittently and spirally between the protrusions of adjacent rows, the falling distance becomes longer, and the falling speed is suppressed, so that the object to be crushed falls intermittently and spirally. The crushing time and kneading time that the product undergoes becomes longer, and the bending shear also acts on the product, resulting in the elimination of flat crushed products and the particle shape can be significantly improved.

(3) Also, since the falling speed of the material to be crushed is suppressed,
The materials to be crushed are filled with appropriate voids in the crushing chamber, and there is no packing phenomenon caused by overcrowding below the crushing chamber, allowing stable cheese yoke operation, and at the same time, uneven wear of the cone cave is reduced. The lifespan of mantle and corn cave can be improved.

[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...
Convex part, 33...Corn cave.

Claims (1)

[Claims] 1. In the mantle of a rotary crusher that works with a cone cave to crush objects to be crushed, a large number of protrusions that are intermittently connected diagonally downward in the forward direction of the rotation direction of the mantle are provided on the crushing surface of the mantle. A mantle for a rotary crusher, characterized in that multiple rows are formed at appropriate intervals in the circumferential direction.