EP0052165A1 - Mineral breakers - Google Patents
Mineral breakers Download PDFInfo
- Publication number
- EP0052165A1 EP0052165A1 EP80304060A EP80304060A EP0052165A1 EP 0052165 A1 EP0052165 A1 EP 0052165A1 EP 80304060 A EP80304060 A EP 80304060A EP 80304060 A EP80304060 A EP 80304060A EP 0052165 A1 EP0052165 A1 EP 0052165A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- teeth
- mineral breaker
- breaker according
- mineral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
Definitions
- the present invention relates to mineral breakers in p ar ti cula rlv, to mineral breakers for use in coal mining for ensuring maximum sizing of coal.
- a mineral breaker having a pair of side by side breaker drums which are spaced laterally from one another and arranged to rotate in opposite directions, each drum having a plurality of breaker teeth arranged in circumferentially extending groups of teeth spaced along each drum with the groups of teeth on one drum being positioned so as to extend between the groups of teeth on the other drum.
- a mineral breaker 10 includes a main frame 11, which in use is capable of being sited over a conveyor for depositing sized material onto the conveyor which then transports the sized mineral away.
- the frame 11 houses a pair of breaker drums 14 which are located within a chamber lla defined by side walls llb of the housing and end support walls 50, 51 .
- Each of the drums 14 is fixedly mounted on shafts 15 and 16 respectively.
- Each drum is provided with a plurality of breaker teeth 17 which are arranged in circumferentially extending groups of teeth, with the groups on one drum being positioned so as to extend between the groups on the other drum.
- Both shafts 15,16 are rotatably supported at each end in bearing assemblies 19,20 respectively.
- Each pair of bearing assemblies 19,20 are respectively mounted within bearing seats 52,53 formed in end support walls 50,51 respectively.
- the end support walls 50,51 are each composed of two separate halves 50a, 50b and 51a,51b respectively, each half being secured to the side walls of the housing by bolts 54. Thus by separating adjoined halves it is possible to remove the respective bearing assemblies from the end support walls.
- Shaft 15 is drivingly connected via a drive coupling 28 to an electric motor and reduction gear box assembly 30 which is bolted to an end plate 58 of the housing 11.
- the drive coupling 28 is of similar construction to that disclosed in U.K. Patent application 40511/78.
- Shafts 15 and 16 are drivingly connected to one another by means of a Budapestsof meshing gears 35 so that the drums 14 rotate in opposite directions.
- the angular position of the teeth on one drum in relation to those on the other drum is preferably arranged so that teeth on one drum extend between the circumferential spacing between teeth on the other drum. This relative angular position is maintained during operation by the meshing gears 35.
- the relative angular position between teeth on the drums may be adjusted as desired by changing the relative angular position of meshing gears 35.
- By changing the relative angular positions of the teeth on the drums 14 it is possible to adjust the breaker so as to produce sized material of a predetermined size.
- the breaker teeth 17 are of a robust construction, as seen in Figures 3 and 4, and are constructed so as to be capable of breaking mineral which the breaker is intended to size. According, due to the interrelationship of the breaker teeth 17 all oversized mineral passing between the breaker drums 14 is broken to provide sized mineral which is of a predetermined maximum size.
- the shape of the breaker teeth 17 facilitates breaking of the oversized mineral in that a recess 59 is provided between adjacent rear faces 60 of teeth 17, the rear face of each tooth 17 being defined by a ridge 61 which in cross-section is arcuate as shown in Figures 3 and 4.
- the width of ridge 61 is chosen bearing in mind the working conditions of the breaker. Accordingly oversized material will initially be seated across the ridges 61 of one or more adjacent teeth 17 on one drum and then on rotation of the drums, the front face 62 of teeth 17 on the other drum will engage the oversized material seated on the ridges 61. The oversized mineral will therefore be subjected to opposed loadings along its length thus causing it to fracture.
- each tooth 17 is inclined so as to define with an acute enclosed angle with the tangent to the circumference of the drum at the point of intersection of the face 62 with the periphery of the drum. It will be appreciated that angle oL may be varied as desired to suit working conditions of the mineral breaker.
- the teeth 17 on each drum 14 are formed separately to the drum 14.
- sets of teeth 17 are cast together to form an elongate toothed strip 17a which includes a body portion 17b and teeth 17 projecting therefrom.
- the body portion 17b is provided with a rib 17c which extends longitudinally along same side of the body portion 17b as that from which the front faces 62 of teeth 17 are located.
- Each drum 14 is provided with longitudinally extending channels 70 spaced circumferentially from one another.
- Each channel 70 has a bottom wall 70a against which the bottom face 17d of the body portion 17b abuts in use.
- Each channel also has a groove 71 for housing rib 17c as seen in Figure 3.
- Each drum 1 4 is provided with bolt studs 75 which are anchored in the drum and project outwards into channel 70,
- the strips 17a are provided with apertures 80 and nut accomodating recesses 81 for securing each strip to the drum.
- apertures 80 and recesses 81 have been omitted from Figure 2, their location being identified by crosses A, As seen in Figure 2, two strips 17a are provided in each channel 70. It will be appreciated that toothed drums of varying lengths may easily be constructed using one or more strips 17a per channel 70.
- the method of securing the strip 17a to the drums 14 described above is particularly advantageous since removal of the strips is relatively simple by removal of nuts 76 whilst, in use, loadingsapplied to the front faces 62 of the teeth are transmitted to the drum via ribs 17c and co-operating grooves 71 and the bottom face 17d of the body portion 17b and the bottom wall 70a of channel 70. Thus in use, bolt studs 75 and nuts 76 are not loaded by the breaking operation of the drums.
Abstract
A mineral breaker having a pair of side by side breaker drums (14) which are spaced laterally from one another and arranged to rotate in opposite directions, each drum (14) having a plurality of breaker teeth (17) arranged in circumferentially extending groups of teeth spaced along each drum with the groups of teeth on one drum being positioned so as to extend between the groups of teeth on the other drum.
Description
- The present invention relates to mineral breakers in particularlv, to mineral breakers for use in coal mining for ensuring maximum sizing of coal.
- According to the present invention there is provided a mineral breaker having a pair of side by side breaker drums which are spaced laterally from one another and arranged to rotate in opposite directions, each drum having a plurality of breaker teeth arranged in circumferentially extending groups of teeth spaced along each drum with the groups of teeth on one drum being positioned so as to extend between the groups of teeth on the other drum.
- Reference is now made to the accompanying drawings, in which:
- Figure 1 is a plan view, partly in section, of a mineral breaker according to the present invention;
- Figure 2 is a side view of the mineral breaker shown in Figure 1;
- Figure 3 is a sectional view taken along line III-III in Figure 2;
- Figure 4 is a similar view to that of Figure 3 of a different embodiment according to the present invention;
- Referring initially to Figures 1 to 3, a mineral breaker 10 includes a
main frame 11, which in use is capable of being sited over a conveyor for depositing sized material onto the conveyor which then transports the sized mineral away. Theframe 11 houses a pair ofbreaker drums 14 which are located within a chamber lla defined by side walls llb of the housing andend support walls 50,51. Each of thedrums 14 is fixedly mounted onshafts breaker teeth 17 which are arranged in circumferentially extending groups of teeth, with the groups on one drum being positioned so as to extend between the groups on the other drum. - Both
shafts bearing assemblies bearing assemblies seats end support walls end support walls separate halves bolts 54. Thus by separating adjoined halves it is possible to remove the respective bearing assemblies from the end support walls. - Shaft 15 is drivingly connected via a
drive coupling 28 to an electric motor and reductiongear box assembly 30 which is bolted to anend plate 58 of thehousing 11. Preferably thedrive coupling 28 is of similar construction to that disclosed in U.K. Patent application 40511/78. ;Shafts 15 and 16 are drivingly connected to one another by means of apaixsof meshing gears 35 so that thedrums 14 rotate in opposite directions. As shown in Figure 3 the angular position of the teeth on one drum in relation to those on the other drum is preferably arranged so that teeth on one drum extend between the circumferential spacing between teeth on the other drum. This relative angular position is maintained during operation by themeshing gears 35. It will be appreciated that the relative angular position between teeth on the drumsmay be adjusted as desired by changing the relative angular position ofmeshing gears 35. By changing the relative angular positions of the teeth on thedrums 14 it is possible to adjust the breaker so as to produce sized material of a predetermined size. - The
breaker teeth 17 are of a robust construction, as seen in Figures 3 and 4, and are constructed so as to be capable of breaking mineral which the breaker is intended to size. According, due to the interrelationship of thebreaker teeth 17 all oversized mineral passing between thebreaker drums 14 is broken to provide sized mineral which is of a predetermined maximum size. - The shape of the
breaker teeth 17 facilitates breaking of the oversized mineral in that arecess 59 is provided between adjacent rear faces 60 ofteeth 17, the rear face of eachtooth 17 being defined by aridge 61 which in cross-section is arcuate as shown in Figures 3 and 4. The width ofridge 61 is chosen bearing in mind the working conditions of the breaker. Accordingly oversized material will initially be seated across theridges 61 of one or moreadjacent teeth 17 on one drum and then on rotation of the drums, thefront face 62 ofteeth 17 on the other drum will engage the oversized material seated on theridges 61. The oversized mineral will therefore be subjected to opposed loadings along its length thus causing it to fracture. - As seen in Figures 3 and 4, the
front face 62 of eachtooth 17 is inclined so as to define with an acute enclosed angle with the tangent to the circumference of the drum at the point of intersection of theface 62 with the periphery of the drum. It will be appreciated that angle oL may be varied as desired to suit working conditions of the mineral breaker. - In the embodiment of Figures 1 to 3, the
teeth 17 on eachdrum 14 are formed separately to thedrum 14. Thus sets ofteeth 17 are cast together to form anelongate toothed strip 17a which includes a body portion 17b andteeth 17 projecting therefrom. The body portion 17b is provided with a rib 17c which extends longitudinally along same side of the body portion 17b as that from which the front faces 62 ofteeth 17 are located. - Each
drum 14 is provided with longitudinally extendingchannels 70 spaced circumferentially from one another. Eachchannel 70 has a bottom wall 70a against which the bottom face 17d of the body portion 17b abuts in use. Each channel also has a groove 71 for housing rib 17c as seen in Figure 3. Each drum 14 is provided with bolt studs 75 which are anchored in the drum and project outwards intochannel 70, Thestrips 17a are provided with apertures 80 and nut accomodating recesses 81 for securing each strip to the drum. For the sake of simplicity, apertures 80 and recesses 81 have been omitted from Figure 2, their location being identified by crosses A, As seen in Figure 2, twostrips 17a are provided in eachchannel 70. It will be appreciated that toothed drums of varying lengths may easily be constructed using one ormore strips 17a perchannel 70. - The method of securing the
strip 17a to thedrums 14 described above is particularly advantageous since removal of the strips is relatively simple by removal ofnuts 76 whilst, in use, loadingsapplied to thefront faces 62 of the teeth are transmitted to the drum via ribs 17c and co-operating grooves 71 and the bottom face 17d of the body portion 17b and the bottom wall 70a ofchannel 70. Thus in use, bolt studs 75 andnuts 76 are not loaded by the breaking operation of the drums. - It is to be noted that in Figure 3 all
teeth 17 are formed onstrips 17a and that for the sake of simplicity only onestrip 17a is shown. - In the embodiment of Figure 4, all parts of the breaker are the same as those described in respect of the embodiment of Figures 1 to 3 apart from the drum construction. Thus, in Figure 4,
teeth 17 are formed integrally withdrums 14 instead of being formed onstrips 17a.
Claims (10)
1. A mineral breaker having a pair of side by side breaker drums which are spaced laterally from one another and arranged to rotatein,opposite directions, each drum having a plurality of breaker teeth arranged in circumferentially extending groups of teeth spaced along each drum with the groups of teeth on one drum being positioned so as to extend between the groups of teeth on the other drum.
2. A mineral breaker according to Claim 1, wherein the angular position of teeth on one drum in relation to those on the other drum is arranged so that teeth on one drum extend between the circumferential spacing between the groups on the other drum.
3. A mineral breaker according to Claim 1 or 2, wherein each tooth on each drum is provided with a ridge projecting rearwardly, in the direction of rotation.
4. A mineral breaker according to Claim 3, wherein the ridge of each tooth is arcuate in cross-section.
5. A mineral breaker according to any of Claims 1 to 4, wherein the leading face of each tooth on each drum is substantially planar.
6. A mineral breaker according to any preceding Claim, wherein the teeth on each drum are integrally formed therewith.
7. A mineral breaker according to any of Claims 1 to 6, wherein the teeth on each drum are releasably connected to the drum.
8. A mineral breaker according to Claim 7, wherein the teeth are formed as part of elongate toothed strips, the strips being releasably connected to a respective drum so as to extend along the length of the drum.
9. A mineral breaker according to Claim 8, wherein each strip has a body portion from which said teeth project and a rib projecting from the leading side of the body portion, the drum having longitudinally extending channels for receiving the body portion and a recess formed in the leading side wall of each channel for accommodating said rib.
10. A mineral breaker substantially as described with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP80304060A EP0052165A1 (en) | 1980-11-13 | 1980-11-13 | Mineral breakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP80304060A EP0052165A1 (en) | 1980-11-13 | 1980-11-13 | Mineral breakers |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0052165A1 true EP0052165A1 (en) | 1982-05-26 |
Family
ID=8187301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80304060A Withdrawn EP0052165A1 (en) | 1980-11-13 | 1980-11-13 | Mineral breakers |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0052165A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0246775A2 (en) * | 1986-03-20 | 1987-11-25 | Mmd Design And Consultancy Limited | Mineral breaker |
DE4123967A1 (en) * | 1991-07-19 | 1993-01-21 | Krupp Industrietech | Machine for crushing stone - has replaceable teeth which are attached to crushing rollers by rings |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1356291A (en) * | 1917-02-15 | 1920-10-19 | Joseph E Kennedy | Crushing-roll machine |
GB294798A (en) * | 1927-09-26 | 1928-08-02 | Herbert Arthur Pertwee | Improvements in means for breaking coke |
FR871657A (en) * | 1941-04-21 | 1942-05-05 | Paget & Cie Ets | Advanced crusher |
US3240436A (en) * | 1963-07-02 | 1966-03-15 | Buell Engineering Company Inc | Apparatus for breaking up solids |
-
1980
- 1980-11-13 EP EP80304060A patent/EP0052165A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1356291A (en) * | 1917-02-15 | 1920-10-19 | Joseph E Kennedy | Crushing-roll machine |
GB294798A (en) * | 1927-09-26 | 1928-08-02 | Herbert Arthur Pertwee | Improvements in means for breaking coke |
FR871657A (en) * | 1941-04-21 | 1942-05-05 | Paget & Cie Ets | Advanced crusher |
US3240436A (en) * | 1963-07-02 | 1966-03-15 | Buell Engineering Company Inc | Apparatus for breaking up solids |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0246775A2 (en) * | 1986-03-20 | 1987-11-25 | Mmd Design And Consultancy Limited | Mineral breaker |
EP0246775A3 (en) * | 1986-03-20 | 1989-02-01 | Mmd Design And Consultancy Limited | Mineral breaker |
DE4123967A1 (en) * | 1991-07-19 | 1993-01-21 | Krupp Industrietech | Machine for crushing stone - has replaceable teeth which are attached to crushing rollers by rings |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR IT LU NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19830429 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: POTTS, ALAN |