JPH035211B2 - - 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] A rotary crusher is constructed as shown in FIG. 9, taking a gyratory crusher as an example.

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. 9)
The upper frames 1a and 1b of
It is connected to the upper part of the lower frame 2 placed on a pedestal (not shown).

A sleeve 4 having an eccentric shaft hole 3 passing through the lower frame 2 in the vertical direction is rotatably fitted into the boss portion 2a of the lower frame 2. The lower end of the arranged main shaft 5 is inserted through it. 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 spherical bearing, and the upper bearing 9 is supported by a spider 11 integrated with a rim 10 attached to the upper end of the upper frame 1.

The main shaft 5 has a mantle core 1 in the shape of a truncated conical tube.
2 is integrally provided facing the inner circumferential surface of the upper frame 1, and a mantle 13 in the shape of a truncated conical tube 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 peripheral surface of the upper frame 1,
A large number of cone cave segments 14a in the shape of inverted trapezoidal plates made of high manganese cast steel are mounted in multiple rows and stages in a staggered manner with appropriate clearances from each other and backed up materials 15. A crushing chamber 16 having a wedge-shaped hollow cross section is formed between the cone cave 14 and the mantle 13.

On the other hand, a driven bevel gear 17 is attached to the lower end of the sleeve 4, 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. Horizontal rotation axis 18
is supported by a casing 20 attached to the lower frame 2 via a bearing 21, and the horizontal rotating shaft 1
A pulley 22 is attached to the outer end of the pulley 8 and is connected to an electric motor (both not shown) via a belt.

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 is discharged outside the machine from the discharge port of the lower frame 2.

[Problems to be Solved by the Invention] However, the mantle 13 of the conventional rotary crusher is usually made of high manganese cast steel as described above. This is due to the work hardenability of high manganese steel, that is, the mantle 1 made of high manganese cast steel.
This method takes advantage of the property that the crushing surface (outer peripheral surface) of No. 3 increases hardness due to deformation when crushing the object.

However, in the mantle of a conventional rotary crusher made of high manganese cast steel, when the work hardening effect is large during operation, such as in a large-sized gear reticulation crusher, the outer side of the mantle 13 as shown in FIG. The diameter becomes larger than the inner diameter, the inner side is forcibly expanded, and a large number of cracks 23 are generated in the axial direction (in the vertical direction in the figure).
There is a problem in that the cracks 23 eventually progress to the outside and lead to damage to the mantle 13.

SUMMARY OF THE INVENTION Therefore, the present invention provides a mantle for a rotary crusher that does not cause damage due to the occurrence of cracks even when subjected to a large amount of work hardening action.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a metal material having a low hardness on the outer peripheral surface of a truncated conical mantle body made of a metal material with excellent work hardening properties. A buried member made of a suitable material is buried.

[Function] The buried members of the mantle wear out due to rubbing and gouging caused by the objects to be crushed during crushing, and a recess is formed on the outer circumferential surface of the mantle. When it is compressed, it undergoes deformation (elongation), and this deformation is absorbed by the recesses while maintaining balance.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 8.

Figures 1a and b are a half-cut vertical front view and a developed view of the mantle of the first embodiment, and the mantle 24 of the first embodiment is made of high manganese cast steel (JIS.SCMNH-11) with excellent work hardenability. A mantle main body 24a in the shape of a truncated conical tube, and a plurality of annular buried members 24b embedded in the outer peripheral surface of the mantle main body 24a at appropriate distances in the axial direction (in the vertical direction in FIG. 1a). Consisting of Each buried member 24b is
Low carbon steel (JIS.SS41), which is a metal material with lower hardness than the high manganese cast steel that forms the mantle body 24a.
The outer surface is the mantle body 24.
It is provided on the same outer peripheral surface of a.

In the mantle 24 having the above configuration, the buried member 2
4b is worn out by being rubbed and gouged by the object to be crushed during the crushing of the object, and as shown in Fig. 2,
A circumferential recess 25 is formed on the outer circumferential surface of the mantle 24, while the outer circumferential portion of the mantle body 24a is compressed by the material to be crushed and deformed (elongated), and this deformation occurs in the axial direction (Fig. 2). (in the arrow direction), it is absorbed into the recess 25.

On the other hand, the mantle main body 24a undergoes work hardening due to deformation and becomes hard to about H _s 70. In this case, the embedded member 24b has almost no work hardening and has a hardness of about H _s 22.

Therefore, the outer circumferential surface of the mantle 24 is work-hardened without expanding geometrically as in the conventional case, and is evenly worn as the object to be crushed is crushed.

Note that the annular buried member 24b is not limited to a plurality of stages, and may be one stage. Further, the buried member 24b at each stage may be formed from one strip material, or may be formed from a plurality of arcuate strip materials.

Figures 3a and 3b are a half-cut vertical front view and a developed view of the mantle of the second embodiment, and the mantle 26 of the second embodiment is a truncated conical tube made of high manganese cast steel, similar to that of the first embodiment. shaped mantle body 26a
The mantle body 2 is made of low carbon steel strip material.
A plurality of rows of buried members 26b formed in a straight line in the axial direction (in the vertical direction in FIG. 3a) are buried at appropriate intervals in the circumferential direction (in the left-right direction in FIG. 3b) on the outer circumferential surface of 6a. Become.

In the mantle 26 having the above configuration, the buried member 2
6b is worn out by being rubbed and gouged by the object to be crushed during the crushing of the object, and as shown in FIG.
An axial recess 27 is formed on the outer peripheral surface of the mantle 26, while the outer peripheral part of the mantle main body 26a is deformed (elongated) due to compression by the material to be crushed, and this deformation is performed in the circumferential direction. It is absorbed into the recess 27 by this.

On the other hand, the mantle main body 26a undergoes work hardening due to deformation, as in the first embodiment, and becomes hard to about H _s 70. In this case, the embedded member 26b has almost no work hardening and has a hardness of about H _s 22.

Note that each of the linear buried members 26b is
It is not limited to the case where it is formed from a plurality of strip material, but may be formed from a single strip material.

5 and 6 are half-cut vertical front views and developed views of the mantles of the third and fourth embodiments, and the mantles 28 and 29 of the third and fourth embodiments are In the first and second embodiments, the buried members 24b, 26b are connected to the mantle bodies 24a, 26.
Embedded members 28b and 29b are embedded in the outer circumferential surface of the mantle bodies 28a and 29a, respectively, extending in the circumferential and axial directions. It was buried in

The functions and effects of the mantles 28 and 29 in the third and fourth embodiments are substantially the same as those in the first and second embodiments, so their explanation will be omitted.

7 and 8 are half-cut vertical front views and developed views of the mantles of the fifth and sixth embodiments, and the mantles 30 and 31 of the fifth and sixth embodiments are , mantle bodies 30a and 31a
A cross-shaped buried member 30 made of a strip material is installed on the outer peripheral surface of the
A large number of dot-shaped buried members 31b made of round bar materials are buried spaced apart in the circumferential direction and the axial direction, respectively.

The functions and effects of the mantles 30 and 31 of the fifth and sixth embodiments are substantially the same as those of the above-mentioned embodiments, so the explanation thereof will be omitted.

In addition, the buried member 24b in each of the above embodiments,
The thickness and outer diameter of 26b, 28b, 29b, 30b, 31b and the mantle body 24a, 26a, 2
The arrangement density of 8a, 29a, 30a, 31a on the outer circumferential surface, etc. may be determined depending on the degree of work hardening effect.

[Effects of the Invention] As described above, according to the present invention, the buried member is subjected to rubbing and gouging by the object to be crushed and is worn out during crushing,
While the recess is formed, the outer periphery of the mantle body is deformed (elongated) due to compression by the material to be crushed.
is absorbed into the recess while maintaining balance,
Cracks do not occur as in the conventional case. Therefore, work hardening due to deformation is effectively performed, and the life of the mantle can be greatly extended.

[Brief explanation of drawings]

1 to 8 show embodiments of the mantle of the rotary crusher according to the present invention. Figure 2 is an explanatory diagram of the operation of the mantle in the first embodiment, Figures 3a and b are half-cut vertical front views and developed views of the mantle in the second embodiment, and Figure 4 is an explanatory diagram of the operation of the mantle in the second embodiment. , each of a and b in FIGS. 5, 6, 7, and 8 is a half-cut longitudinal sectional front view and a developed view of the third embodiment, the fourth embodiment, the fifth embodiment, and the sixth embodiment, FIG. 9 is a longitudinal sectional view of a rotary crusher, and FIG. 10 is a half-cut longitudinal sectional front view of a conventional mantle. 24, 26, 28, 29, 30, 31... Mantle, 24a, 26a, 28a, 29a, 30
a, 31a...mantle body, 24b, 26b,
28b, 29b, 30b, 31b... buried member,
25, 27... recess.

Claims (1)

[Scope of Claims] 1. A mantle body made of a metal material with excellent work hardening properties and shaped like a truncated conical tube, with a buried member made of a metal material having low hardness appropriately embedded in the outer peripheral surface of the mantle body. Mantle of rotary crusher. 2. The mantle of a rotary crusher according to claim 1, wherein the buried member is buried in a circular ring shape in the circumferential direction. 3. The mantle of a rotary crusher according to claim 1, wherein the buried member is buried in a straight line in the axial direction. 4. The mantle of a rotary crusher according to claim 1, wherein the buried member is buried in a mesh shape in the circumferential direction and the axial direction. 5. Claim 1, wherein the buried member is buried in a number of cross shapes spaced apart in the circumferential direction and the axial direction.
The mantle of the rotary crusher described in Section 1. 6. The mantle of a rotary crusher according to claim 1, wherein the buried member is buried in the form of a large number of dots spaced apart in the circumferential direction and the axial direction.