AU675043B2

AU675043B2 - Gyration-type crushing machine

Info

Publication number: AU675043B2
Application number: AU37905/95A
Authority: AU
Inventors: Shigeto Fukumura; Tsukasa Katayama; Yorizo Kudo; Toru Nakanishi
Original assignee: Kawasaki Heavy Industries Ltd; Kawasaki Jukogyo KK
Current assignee: Earthtechnica Co Ltd
Priority date: 1993-05-12
Filing date: 1995-11-16
Publication date: 1997-01-16
Anticipated expiration: 2014-05-09
Also published as: AU6196994A; AU666074B2; JP2782148B2; JPH06320026A; ZA943253B; AU3790595A

Description

S F Ref: 271317D1

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

r Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: Kawasaki Jukogyo Kabushiki Kaisha 1-1, Higashikawasaki-Cho 3-Chome Chuo-Ku, Kobe-Shi Hyogo-Ken

JAPAN

Tsukasa Katayama, Shigeto Fukumura, Yorizo Kudo and Toru Nakanishi.

Spruson Ferguson, Patent Attorneys Level 33 St Martins Tower, 31 Market Street Sydney, New South Wales, 2000, Australia Gyration-Type Crushing Machine The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5845 -1 iA- GYRATION-TYPE CRUSHING MACHINE BACKGROUND OF THE INVENTION The present invention relates to a gyration-type crushing machine such as hydraulic or spring-type cone crusher or secondary gyratory crusher particularly provided with a blade means for forcibly pressing down a material to be crushed.

Fig. 14 is a schematic view showing a structure of a conventional gyrationtype crushing machine provided with blades. The gyration-type crushing machine comprises a mantle 12 and concave 14. The mantle 12 is rotatably mounted to a main shaft 18 through a mantle core, not shown, and a crushing chamber 16 is defined between the mantle 12 and the concave 14. A plurality of blades 20 are provided on an outer peripheral surface of the mantle 12 so as to obliquely direct towards its rotating direction, that is, the rear lower side direction of the self-rotation direction of the main shaft 18.

o. The material fed into the crushing chamber 16 is forcibly pressed downward in the crushing chamber 16 in accordance with the rotation of the blades 20 which are rotated by the gyrating motion of the gyration-type crushing machline 10. At the lower portion of the crushing chamber 16, the material is crushed under forcibly and tightly 20 pressed and packed condition. According to this operation, the material can be crushed •no• to obtain a finely crushed material.

According to the gyration-type crushing machine of the structure shown in Fig.

14 and described above, dry-type crushing process for crushing dry material and wet or damp-type crushing process for crushing wet or damp adhesive material can be done, but in the wet crushing, it is necessary to avoid clogging of the material in the crushing chamber during the operation of the crushing machine.

IN:\LIBHH0IO360:Iam St I 1 A gyration-type crushing machine provided with blades is for example disclosed in the Japanese Patent Publication (I(OKOKU) No. HEI 4-9094 (9094/1992), in which the crushing machine has a mantle having an outer peripheral surface on which blade means, such as a plurality of blades or a single spiral blade, is provided and the blade means is directed to the rear lower side of the rotation direction of the mantle during the load operation for forcibly pressing down the material in the crushing chamber thereby increasing the throughput of the crushing machine and improving the nature of the crushed material. In this structure, the material in the lower portion of the crushing chamber can be compactly and tightly pressed and packed and the material can be hence effectively crushed. However, there is a case where the material is not sufficiently pressed and packed, resulting in the lowering of the crushing performance, due to the nature of the material to be crushed.

Thus, the crushing method utilizing the crushing machine disclosed in this Japanese Patent Publication (KOKOKU) No. HEI 4-9094 (9094/1992) also provides a problem to be solved.

OBJECT OF THE INVENTION It is an object of the present invention to overcome or substantially ameliorate the above disadvantages.

[N:\Iibtt]00838:BFD t t SUMMARY OF THE INVENTION There is disclosed herein a gyration-type crushing machine provided with a mantle and a concave between which a crushing chamber is formed and with a blade means provided on an outer peripheral surface of the mantle and directed downwardly obliquely with respect to a rotating direction of the mantle when rotated thereby feeding under pressure a material to be crushed downward in the crushing chamber, characterized in that said blade means comprises a plurality of blades arranged in a plurality of stages in a height direction of the mantle when operated.

There is further disclosed herein a gyration-type crushing machine provided with a mantle and a concave between which a crushing chamber is formed and with a blade means provided on an outer peripheral surface of the mantle and directed downwardly obliquely with respect to a rotating direction of the mantle when rotated thereby feeding under pressure a S material to be crushed downward in the crushing chamber, characterized in that said blade means comprises a plurality of blades, said blades being formed on the outer peripheral surface of the mantle along an entire height direction thereof and said blades each having an outer profile providing rotation project area of the blade to make substantially narrow a space in the crushing chamber formed between the mantle and the concave.

0 [N:\libtt]00838:BFD -4- There is further disclosed herein a gyration-type crushing machine provided with a mantle and a concave between which a crushing chamber is formed and with a blade means provided on an outer peripheral surface of the mantle and directed downwardly obliquely with respect to a rotating direction of the mantle when rotated thereby feeding under pressure a material to be crushed downward in the crushing chamber, characterized in that said blade means comprises a plurality of blades, said blades being formed on the outer peripheral surface of the mantle along an entire height direction thereof, said blades each having an outer profile providing an inclination with respect to a radial direction of the mantle.

According to the structures of the present invention described above, the material fed into the crushing chamber of the gyration-type crushing machine is forcibly pressed downward in accordance with the rotation of the mantle. Since the obliquely directed blades have elongated acting lengths, the pressing force can be applied to the material in the entire height direction along the outer peripheral surface of the mantle, thus improving the crushing function and the nature of the crushed material under highly pressed and packed condition thereof. Furthermore, the wet and/or damp e :oioe°

RA=:>

[N:\libtt]00838:BFD adhesive material having relatively low density as well as the dry material can be effectively crushed regardless of the kinds of the material to be crushed, whereby when even any kind of material is to be crushed, the crushing capacity can be increased and finely crushed material cani be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described, by way of example only, with reference to the accompanying drawings, wherein: Fig. 1 is a schematic view showing a structure of a gyration-type crushing machine according to a first embodiment of the present invention; Fig. 2 is a graph representing comparison in throughput of gyration-type crushing machines of the present invention and a conventional one; Fig. 3 is a schematic view showing a structure of a gyration-type crushing machine according to a second embodiment of the present invention; Fig. 4 is a schematic view showing a structure of a gyration-type crushing machine according to a third embodiment of the present invention; Fig. 5 is a schematic view showing a structure of a gyration-type crushing oeooo machine according to a fourth embodiment of the present invention; 20 Figs. 6 and 7 are schematic views showing a structure of a gyration-type crushing machine according to a fifth embodiment of the present invention; Figs. 8 and 9 are schematic views showing a structure of a gyration-type crushing machine according to a sixth embodiment of the present invention; Figs. 10 and 11 are schematic views showing a structure of a gyration-type crushing machine according to a seventh embodiment of the present invention; Figs. 12 and 13 are schematic views showing a structure of a gyration-type crushing machine acc-rding to an eighth embodiment of the present invention; and Fig. 14 is a schematic view showing a structure of a conventional gyrationtype crushing machine.

IN:LIBHH100360am -6- DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 represents a structure of a gyration-type crushing machine 10 provided with a blade means according to the present invention. This first embodiment is an improved one of the conventional structure such as shown in Fig. 14. This first embodiment differs from the conventional structure of Fig. 14 in the arrangement of the blade means, comprising a plurality of blades 21, which are disposed on the outer peripheral surface of a mantle 12 so as to project, at their upper portions, over the upper end surface 12a of the mantle 12. The mantle 12 is mounted to a mantle shaft 18 to be rotatable. Each blade 21 has a predetermined chord length and is composed of an upper blade portion 21a and a lower blade portion 21b being continuous to the upper blade portion 21a. The lower blade portion 21b is positioned on an upper surface of the outer peripheral surface of the mantle 12 and the upper blade portion 21a project upwards over the upper end surface, or a surface portion near the upper end portion of the mantle 12. The blade 21 has a width of a ratio 0.6 0.9 with respect to an entrance port of the crushing chamber 16 and the upper blade portion 21a has a length of a ratio 0.2 1.0 with respect to the entire length of the blade 21. The material fed into the .:oooi S" crushing chamber 16 during the operation of the gyration-type crushing machine 10 is 20 pressed downward by the blades 21 rotated together with the mantle 12. During this feeding of the material, the material is first caught and then pressed by the side surfaces of the upper blade portion 21a positioned above the upper end surface of the mantle 12, and accordingly, the material is forcibly pressed at this stage at the inlet portion of the crushing chamber 16 and then forcibly pressed downward therein. Thereafter, the material is further continuously pressed by the side surfaces of the lower blade portions 21b to forcibly feed the material further downward under pressure. Accordingly, the material can be forcibly pressed in the entire height direction of the mantle 12 and the crushing chamber 16 even before its inlet portion, and particularly, in the deep lower portion, which is narrowed in cross section in accordance with the shapes of the mantle [N:\LIBHHO100360Iam 12 and the concave 14, of the crushing chamber 16, the material can be tightly pressed and packed and the feeding speed to the downward portion is also increased.

Therefore, since the crushing operation is carried out under such tightly pressed and packed condition of the material, the treating, i.e. crushing, capacity can be highly improved and the nature of the crushed material can be also improved The above first embodiment is described with respect to the dry type crushing process of the material, but in the case of wet type crushing process of a material having low density or wet or damp adhesive type material, the throughput is lowered as shown in Fig. 2. This throughput is gradually lowered in accordance with the increasing of water content in the material and this lowering becomes maximum during the wet and damp condition of the material. When the water content in the material is further increased, the throughput is again increased under high water content condition.

SFrom Fig. 2, it will be seen that tho material throughput with respect to the water :•ooo.

content of the material of the present embodiment can be improved in comparison with the prior art technique.

Fig. 3 shows a second embodiment according to the present invention.

This second embodiment differs from the first embodiment in the following structure. Namely, in the second embodiment, a hopper portion 38 defined by a hopper oeoe• casing 36 is located above the upper end surface 14a of the concave 14, and the hopper 20 casing 36 has a lower portion formed in an inverted conical shape having an inner o diameter substantially equal to an inner diameter of the upper end surface 14a of the concave 14.

Each of the blades 22 provided on the outer peripheral surface of the mantle 12 has a predetermined chord length and is composed of an upper blade portion 22a and a lower blade portion 22b, both blade portions being continuous to form one blade 22.

The upper blade portion 22a extends upward over the upper end surface of the mantle 12 or near this portion into the hopper portion 38, and the upper blade portions 22a of the respective blades 22 are arranged along the lower portion of the hopper casing 36 with spaces.

IN:\LIBHHIOO360:am -8- According to this second embodiment, since the material stored in the hopper portion 38 can be forcibly pressed and fed downward into the crushing chamber 16, the material can be effectively pressed and packed in the crushing chamber 16 with highly crushed density. Furthermore, according to this embodiment, the material having relatively low density can be highly pressed and crushed finely, thus improving the throughput of the material and hence improving the nature of the crushed material.

A third embodiment of the present invention will be described hereunder with reference to Fig. 4, in which blades 23 and 23a are provided in multiple stage, for example, two stages as illustrated, on the outer peripheral surface of the mantle 12, and in the illustrated embodiment, four blades 23 are provided as upper stage blades and four blades 23a are provided as lower stage blades. It will be desired that the upper stage blades 23 have upper portions extendcling upwards over the upper end of the mantle 12.

:°oooo According to this third embodiment, the material packed in the crushing chamber 16 can be forcibly pressed throughout the vertical height direction of the mantle 12, thereby increasing the pressed density of the material in the crushing chamber 12 and hence improving the nature of the crushed material.

A fourth embodiment of the present invention is shown in Fig. 5, in which the oe o i blades 23, 23b and 23a are provided on the outer peripheral surface of the mantle 12, 20 and these blades are arranged in three stages along the height direction of the mantle, first (highest) stage including four blades 23, second (intermediate) stage including four blades 23b and third (lowest) stage including eight blades 23a. As shown in Fig. 5, the lowest stage blades 23a are increased in numbers in accordance with the increased diameter of the mantle 12, which has a diameter gradually increasing downwardly in its height direction. It will be desired that the highest stage blades 23 have upper portions extending upwards over the upper end of the mantle 12.

In the third and fourth embodiments, the numbers of the blades in the respective stages may be selected in accordance with the diameter of the outer periphery of the mantle without specifically limited to the above embodiments.

[N \LIBHH0IO360Iam According to this fourth embodiment, the pressing function to the material in the crushing chamber 16 can be further increased throughout the vertical height direction of the mantle 12.

Figs. 6 and 7 represent a fifth embodiment t the present invention. In this fifth embodiment, a plurality of blades 24, each having a predetermined chord length, are provided on the entire outer periphery of the mantle 12 along the space of the crushing chamber 16 defined between the mantle 12 and the concave 14. Each of the blades 24 extends almost throughout the entire height direction of the mantle 12 and the blade 24 has a length of the ratio 0.5 to 0.9 with respect to the entire height of the mantle 12. As shown in Fig. 7, the blades 24 are arranged so that the gap between the blades 24 and the concave 14 is made wide at the upper portion of the crushing chamber 16 and is made narrow at the lower portion thereof. Furthermore, the outer S edges of the blades 24 are arranged with spaces from the inner peripheral surface of the e.

concave 14. In this fifth embodiment, it will be also desired that the blades 24 have upper portions extending over the upper end surface of the minantle 12.

According to this fifth embodiment, the pressing function to the material in the crushing chamber 16 can be further increased throughout the height direction of the S mantle 12, and moreover, the wet or damp-type adhesive material can be effectively .eo..i crushed and the material adhering on the inner peripheral surface can be scraped out 20 effectively, thereby improving the crushing function.

S•A sixth embodiment of the present invention shown in Figs. 8 and 9 differs from the fifth embodiment in that the gap between the blades 25 and the concave 14 is formed so as to maintain its constant. As shown in Fig. 9, according to this embodiment, it is so designed that an imaginary discharging volume of a rotation project area of each of the blades 25 has a ratio of 0.8 to 0.9 with respect to an effective volume of the crushing chamber 16.

According to this sixth embodiment, the pressing function to the material in the crushing chamber 16 can be further increased throughout the height direction of the IN:\LIBHHI00360:Iam mantle 12, and this pressing function can be improved throughout substantially the entire volume of the crushing chamber 16.

Figs. 10 and 11 represent a seventh embodiment of the present invention, which differs from the fifth embodiment in that the blades 26 extend in the entire outer peripheral height direction of the mantle 12 and each has an inclined lower portion so that the blade 26 is rearwardly moved with an inclination 0, for example, 0 to 200, with respect to the rotating direction in the radial direction of the mantle 12.

According to this seventh embodiment, the material can be easily bitten by the side surfaces of the blades 26 to thereby promote the starting of the pressing function to the material packed in the crushing chamber 16 along the entire height direction thereof.

Figs. 12 and 13 further represent an eighth embodiment of the present invention, which differs from the seventh embodiment in that the blades 27 extend in the entire outer peripheral height direction of the mantle 12 and each has a lower front edge portion so that the blade 27 is forwardly moved with an inclination 0, for example, 0 to 100, and has a rear edge portion so that the blade 27 is rearwardly moved with an inclination 0, for example, 0 to 20 C with respect to the rotating direction in the radial direction of the mantle 12.

S"According to this eighth embodiment, the blade 27 provides a twisted 20 configuration and the material can be hence easily bitten along the chord length of the blade 27 by the twisted shape of the side surface of the blade 27 to thereby promote the starting of the pressing function to the material packed in the crushing chamber 16 along the entire height direction thereof.

As described above, according to the gyration-type crushing machine having blades of improved structures, the material fed into the crushing chamber of the crushing machine can be forcibly pressed therein in an improved pressed and packed condition and the crushing operation performed under such improved condition can be effectively carried out with high crushing capacity and the thus obtained crushed material provides the excellent natures regardless of the kinds of materials to be treated.

(N:\LIBHH100360:Iam

Claims

1. A gyration-type crushing machine provided with a mantle and a concave between which a crushing chamber is formed and with a blade means provided on an outer peripheral surface of the mantle and directed downwardly obliquely with respect to a rotating direction of the mantle when rotated thereby feeding under pressure a material to be ciuslied downward in the crushing chamber, characterized in that said blade means comprises a plurality of blades arranged in a plurality of stages in a height direction of the mantle when operated.

2. The gyration-type crushing machine according to claim 1, wherein said blades are arranged in two stages on the outer peripheral surface of the mantle along the entire height direction thereof.

3. The gyration-type crushing machine according to claim 2, wherein the numbers of the blades are different in the respective stage, i each other in accordance with a diameter of the mantle.

4. The gyration-type crushing machine according to claim 1, wherein the blades in an upper stage have upper portions extending over the upper end surface of the mantle.

The gyration-type crushing machine according to claim 1, wherein said blades are arranged in three stages on the outer peripheral surface of the mantle along the entire height direction thereof.

6. The gyration-type crushing machine according to claim 5, wherein the numbers of the blades are different in the respective stages from each other in accordance with a diameter of the mantle.

7. The gyration-type crushing machine according to claim 1, wherein the blades in an upper stage have upper portions extending over the upper end surface of the mantle.

8. A gyration-type crushing machine provided with a mantle and a concave between which a crushing chamber is formed and with a blade means provided S on an outer peripheral surface of the mantle and directed downwardly obliquely with [N;\LIBTTIOOB38:BFD -12- r a a a a aa a a a a a a i, a a a a a a a a a respect to a rotating direction of the mantle when rotated thereby feeding under pressure a material to be crushed downward in the crushing chamber, characterized in that said blade means comprises a plurality of blades, said blades being formed on the outer peripheral surface of the mantle along an entire height direction thereof and said blades each having an outer profile providing rotation project area of the blade to make substantially narrow a space in the crushing ci':mber formed between the mantle and the concave.

9. The gyration-type crushing machine according to claim 8, wherein said blades have outer profile so that a space between the blades and the concave is made wide in its upper portion and narrow in its lower portion in the height direction of the mantle.

10. The gyration-type crushing machine according to claim 8, wherein the space is maintained to be constant between the blades and the concave throughout an entire height direction of the mantle to the upper end surface If the concave.

11. The gyration-type crushing machine according to claim 8, wherein the blades have upper portions extending over the upper end surface of the mantle.

12. A gyration-type crushing machine provided with a mantle and a concave between which a crushing chamber is formed and with a blade means provided on an outer peripheral surface of the mantle and directed downwardly obliquely with respect to a rotating direction of the mantle when rotated thereby feeding under pressure a material to be crushed downward in the crushing chamber, characterized in that said blade means comprises a plurality of blades, said blades being formed on the outer peripheral surface of the mantle along an entire height direction thereof, said blades each having an outer profile providing an inclination with respect to a radial direction of the mantle.

13. The gyration-type crushing machine according to claim 12, wherein the inclination is made to the lower edge portion of each of the blades with respect to the radial direction in the rotating direction of the mantle. (N:\LlBTrrlo008o38:BFD -13-

14. A gyration-type crushing machine substantially as hereinbefore described with reference to the accompanying drawings, except figures 2 and 14. DATED this Twenty-ninth Day of January 1996 Kawasaki Jukogyo Kabushiki Kaisha Patent Attorneys for the Applicant SPRUSON FERGUSON *e e as IN:\LIBTTl00838:BFD GYRATION-TYPE CRUSHING MACHINE ABSTRACT A gyration-type crushing machine (10) is provided with a mantle (12) and a concave between which a crushing chamber (16) is formed. The crushing machine (10) is provided with a plurality of blades (23) arranged in a plurality of stages in a height direction of the mantle (12) The blades (23) are directed downwardly obliquely with respect to the direction of rotation of the mantle (12) to feed, under pressure, a material to be crushed downwards into the crushing chamber (16). **0 CSS** e* *V*o IN:\LIBHH00360:0am