AU2016200600A1

AU2016200600A1 - Roller

Info

Publication number: AU2016200600A1
Application number: AU2016200600A
Authority: AU
Inventors: Erich John Hofmann
Original assignee: Hofmann Engineering Pty Ltd
Current assignee: Hofmann Engineering Pty Ltd
Priority date: 2015-01-30
Filing date: 2016-02-01
Publication date: 2016-08-18
Also published as: AU2016102455A4

Abstract

-17 Abstract The present invention provides a roller (11) for use in material crushing. The roller has an outer face (15) which accommodates a plurality of inserts (17). The inserts (17) are arranged in a first pattern (26) over a portion of the outer face. 5 The first pattern repeats at spaced apart intervals around the circumference of the roller. The inserts are embedded in an outer section (13) of the roller whereby an outer end of each insert is spaced outwardly from, or is flush with the outer face of the roller. 21> 2K

Description

Roller

Field of the Invention

This invention relates to rollers which are to be used in a roller crusher for the crushing of rock materials.

Background

The following discussion of the background art is intended to facilitate an understanding of the present invention only. The discussion is not an acknowledgement or admission that any of the material referred to is or was part of the common general knowledge as at the priority date of the application.

In mineral processing, it is typical for ore to pass through a crushing process before the mineral extraction can commence. One mode of crushing the ore is to pass the ore between two rollers. As the material passes between the two rollers the material is crushed.

These rollers typically have a smooth outer surface and are designed and configured to operate with ore within a certain range of characteristics, namely size and hardness. These rollers work well provided the ore remains within the range of characteristics which the rollers have been designed to crush. This is often not the case as the ore within a site can change considerably.

When the ore fed into the roller crusher varies to that which the rollers are designed to process, the efficiency of the roller crusher is significantly reduced. This can lead to the ore not being crushed, the roller crusher becoming blocked, or may damage the roller crusher requiring costly repairs.

Disclosure of the Invention

It is an object of this invention to provide a roller for use in crushing operations which is able to receive and process feed material in a broader size distribution and/or hardness than a crusher having a smooth outer surface, or to at least provide a roller which is able to provide a practical, alternative choice.

Accordingly the invention resides in a roller for use in material crushing, the roller having a plurality of inserts protruding from an outer face of the roller, the inserts being arranged over a portion of the outer face, the inserts being embedded in an outer section of the roller whereby an outer end of each insert is spaced outwardly from or is flush with the outer face of the roller.

Accordingly the invention resides in a roller for use in material crushing, the roller having an outer face, the outer surface providing a plurality of irregular surface portions at spaced apart intervals around the circumference of the roller.

The irregular surface portions may be one, or a combination of inserts embedded in the outer face, textured surface, indentations, and/or recesses incorporated in the outer face.

Accordingly the invention resides in a roller for use in material crushing, the roller having an outer face accommodating a plurality of inserts, the inserts being arranged in a first pattern over a portion of the outer face, the first pattern repeating at spaced apart intervals around the circumference of the roller, the inserts being embedded in an outer section of the roller whereby an outer end of each insert is spaced outwardly from, or is flush with the outer face of the roller.

Accordingly the invention resides in a roller for use in material crushing, the roller having an outer section in which are embedded a plurality of inserts, the inserts being arranged in a first pattern which extends over a portion of the roller’s outer face, the pattern being repeated in spaced apart intervals around the circumference of the roller.

Accordingly the invention resides in a roller for use in material crushing, the roller having an outer face accommodating a plurality of inserts, the inserts being arranged in a plurality of varying patterns over the outer face.

Accordingly the invention resides in a roller for use in material crushing, the roller having an outer face accommodating a plurality of inserts, the inserts being arranged in a plurality of repeating patterns over the outer face.

In contrast to the prior art the arrangement of the plurality of inserts into patterns enables the roller to process feed material which has a broader variation in size and/or hardness when compared to prior art rollers.

According to a preferred feature of the invention the inserts are made form a material having high wear resistant properties. Preferably the inserts are made from a material harder and of higher wear resistance than the material of the roller’s outer section.

In one aspect of the invention the first pattern comprises at least one row of inserts which extend across at least a portion of the roller.

The at least one row of inserts may extend diagonally across the portion of the roller.

The at least one row of inserts may be at least one insert wide.

In one embodiment the inserts are evenly spaced relative to each other.

In another embodiment the at least one row of inserts are formed by randomly positioned inserts whereby the overall positioning of the inserts is such that they collectively form a row.

In another aspect of the invention the first pattern comprises at least one row of inserts which extend from a first side of the roller to a second side of the roller

The at least one row of inserts may extend diagonally across the width of the roller.

In another aspect of the invention the first pattern comprises at least three rows of inserts which extend from a first side of the roller to a second side of the roller.

The at least three row of inserts may extend diagonally across the width of the roller the roller.

The at least three rows may be staggered relative to each other.

The inserts of the at least three rows may extend above the outer surface at varying heights. A first row of the at least three rows may extend above the outer surface a greater height then a second row of the at least three rows.

The second row of the at least three rows may extend above the outer surface a greater height then a third row of the at least three rows.

When considering the roller in motion, the first row may be the trailing row, and the third row may be the leading row.

In another aspect of the invention the first pattern is V-shaped.

The V-shape may comprise one or more rows of inserts.

The V-shape may comprise randomly positioned inserts.

In another aspect of the invention the first pattern has a plurality of v-shaped formations extending from one side of the roller to the other side. Each v-shaped formation may be adjacent another v-shaped formation.

According to a preferred feature of the invention a set of recesses are provided in the outer face of the roller. The recesses may form part of the first pattern.

The inserts may vary in size or shape relative to each other.

According to a preferred feature of the invention the shape and the material selected for each insert may vary in its wear resistance depending on its position on the roller. In use, different areas of the roller experience different wear patterns. It may be desirable in those areas which experience more wear to have inserts of increased hardness, different shape and/or different size so that the inserts do not wear as quickly.

According to a preferred feature of the invention each insert may comprise an insert body received in an insert holder, the insert holder being adapted to be received in a respective pocket. The insert body may be cylindrical or may be any given shape.

According to a preferred feature of the invention the roller is formed by one or more plates secured to a cylindrical body, the one or more plates may have the inserts embedded therein. The one or more plates may form a ring and provide the outer face.

One or more inserts may be spaced inwardly from the outer face of the roller.

According to a preferred feature of the invention the roller is cylindrical.

Accordingly the invention resides in a roller for use in material crushing, the roller having an outer face, the outer face incorporating a first pattern therein wherein the first pattern is repeated around the circumference of the roller.

The first pattern may be repeated in evenly spaced intervals around the circumference of the roller.

The first pattern enables the roller to process feed materials having a greater variation in size and/or hardness than prior art rollers.

In one aspect of the invention the first pattern may be formed from one or a combination of a plurality of: inserts extending outwardly from the outer face, grooves, textured sections, indentations, and/or recesses incorporated in the outer face.

In another aspect of the invention the first pattern may be formed by raising a section of the outer face.

Accordingly the invention resides in a roller crusher, the roller crusher incorporating a pair of rollers wherein at one of the pair of rollers is as herein before described, the rollers being supported in parallel spaced apart relationship and driven in contra-rotation such that in use ore fed between the rollers is crushed therebetween.

Accordingly the invention resides in a roller crusher, the roller crusher incorporating a pair of rollers each as herein before described, and the rollers being supported in parallel spaced apart relationship and driven in contra-rotation such that in use ore fed between the rollers is crushed.

According to a preferred feature of the invention, the clearance space between the rollers is adjustable.

According to a preferred feature of the invention, the rotational axes of the rollers are generally horizontal.

According to a preferred feature of the invention, the rollers are generally cylindrical.

According to a preferred feature of the invention, the inserts are positioned in pockets formed in the roller’s outer surface. The pockets may be formed by drilling, boring or milling, but may alternatively be formed by other methods including laser cutting, high pressure water cutting, casting, forging, electro chemical machining (ECM), electro discharge machining (EDM) etc.

Accordingly the invention resides in a pressure roller for use in semi-autogenous communition of rock materials, the roller having a cylindrical outer face accommodating a set of wear resistance inserts which are arranged across a portion of the outer surface in a first pattern, the inserts being embedded in the surface of the roller, the first pattern being repeated around the circumference of the outer face in an angularly spaced arrangement.

Accordingly the invention resides in a pressure grinding roller, the roller comprising a cylindrical outer face accommodating a set of wear resistance inserts which are arranged in a first pattern over a portion of the outer face, the inserts being embedded in the surface of the roller; wherein the first pattern is repeated around the outer face of the roller.

The invention will be more fully understood in the light of the following description of one specific embodiment.

Brief Description of the Drawings

Further features of the present invention are more fully described in the following description of a non-limiting embodiment thereof. This description is included solely for the purposes of exemplifying the present invention. It should not be understood as a restriction on the broad summary, disclosure or description of the invention as set out above. The description will be made with reference to the accompanying drawings in which:

Figure 1 is a cross sectional view of a typical roller mounted for operation;

Figure 2 is a schematic partial perspective view of an outer face of a roller according to an embodiment of the invention wherein a first pattern is shown;

Figure 3 is a close up view of part of the first pattern shown in figure 2; and

Figure 4 is a view similar of figure 2 but showing repetition of the first pattern.

In the drawings like structures are referred to by like numerals throughout the several views. The drawings shown are not necessarily to scale, with emphasis instead generally being placed upon illustrating the principles of the present invention.

Detailed Description of the Specific Embodiment

An embodiment of the invention depicted in the figures is directed to a roller which is intended for use in a roller crusher (not shown) for crushing ore. The roller crusher comprises two rollers mounted in a spaced apart relation and which are designed to contra rotate. Ore is feed to the region between the rollers and is crushed as the ore travels through the gap between the rollers.

The roller 11 according to an embodiment of the present invention is provided with a cylindrical outer section 13 which provides an outer face 15. The outer section 13 has a plurality of inserts 17 embedded therein. Each insert 17 is made from a wear resistant material such as carbide and is received in a pocket which is of a complementary configuration to the insert 17. Each pocket is formed through the outer face 15 of the roller, which in this embodiment extends radially into the outer section 13 of the roller.

The outer section 13 is formed by a plurality of annular rings 19.

Each insert 17 is typically fixed in position in each pocket by gluing, but may also be fixed by welding, being screwed or keyed into position, be formed to have an interference fit relative to the pocket or any appropriate means.

Each pocket has a depth less than the length of the insert 17 such that upon insertion of the insert 17 into the pocket the outer end of the insert 17 is located outward of the outer face 15 of the roller 11.

While in the present embodiment the pocket extends radially into the roller, it is to be understood that the pockets may extend inwardly at any angle. It is also to be understood that the angle of each pocket may vary according to its position on the roller.

The pockets may be formed in the roller by any known means including drilling, milling, boring, laser or water cutting, casting, electro chemical machining (ECM), electro discharge machining (EDM) or chemical means.

The plurality of inserts 17 project from a portion of the outer face 15 and are arranged into a first pattern 26. The first pattern extends across the outer face 15 from a first side 27 of the roller 11 to a second side 29 of the roller 11. In this embodiment the first pattern 26 is angled diagonally across the width of the roller 11, as best shown in figure 2.

The first pattern comprises a first row 21, a second row 23 and a third row 25, each row having a width of one insert 17. Each row comprises a series of inserts 17. As noted in figure 2, based on the direction of rotation as indicated by arrow ‘A’, the first row 21 is a trailing row, while the third row 25 is the leading row.

As best noted in figure 3 the inserts 17 in the first row 21 are offset, or staggered in relation to inserts 17 in the second row 23, which are offset, or staggered in relation to inserts 17 in the third row 25. Also the inserts 17 in the first row 21 project further above the outer face 15 than the inserts 17 in the second row 23, which project further above the outer face 15 than the inserts 17 in the third row 25.

Referring to figure 4, the first pattern 26 repeats itself around the circumference of the outer face 15 whereby repetitions of the first pattern are angularly spaced form the adjacent first patterns.

The present invention alters the roller’s outer face 15 in order to increase the roller’s 11 ability to process ore within a wider size distribution range and/or hardness, while maintaining the required efficiency. As the ore which is fed into the roller crusher generally varies in size and hardness, it is beneficial to the service life of the roller if it can accommodate a greater variance in ore. The present invention enables this to happen.

The hard metal inserts 17 protrude from the outer face 15 at different heights, creating a profile with increased friction properties, and therefore increases the roller’s ability to process feed material of a larger size variation.

The inserts hardness and wear characteristic are selected to be slightly superior to the material used to form the outer section 13 of the roller, which also increases the service life of the roller. However, the material characteristic of the hard metal inserts 17 is designed to maintain an even wear rate between the outer section 13 of the roller 11 and inserts 17. This minimises the likelihood of the inserts breaking.

In an embodiment of the present invention, the roller is partly covered by hard metal inserts in a series of rows whereby the inserts in adjacent rows are staggered relative to each other.

Generally the inserts are arranged to provide a first pattern which present an angular formation to the ore to be crushed. This assists in spreading the impact of the force/load on the roller assembly.

The advantage of the present invention is it allows the processing of ore/material which would otherwise be outside the design scope of the roller crushers. This enables better performance and less downtime of the crusher. The invention also reduces wear of the roller.

Modifications and variations such as would be apparent to the skilled addressee are considered to fall within the scope of the present invention. The present invention is not to be limited in scope by any of the specific embodiments described herein. These embodiments are intended for the purpose of exemplification only. Functionally equivalent products, formulations and methods are clearly within the scope of the invention as described herein.

Reference to positional descriptions, such as lower and upper, are to be taken in context of the embodiments depicted in the figures, and are not to be taken as limiting the invention to the literal interpretation of the term but rather as would be understood by the skilled addressee.

Throughout this specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

Claims The Claims Defining the Invention are as Follows:

1. A roller for use in material crushing, the roller having an outer face accommodating a plurality of inserts, the inserts being arranged in a first pattern over a portion of the outer face, the first pattern repeating at spaced apart intervals around the circumference of the roller, the inserts being embedded in an outer section of the roller whereby an outer end of each insert is spaced outwardly from, or is flush with the outer face of the roller.
2. A roller for use in material crushing, the roller having an outer section in which are embedded a plurality of inserts, the inserts being arranged in a first pattern which extends over a portion of the roller’s outer face, the pattern being repeated in spaced apart intervals around the circumference of the roller.
3. The roller according to claim 1 or 2 wherein the first pattern comprises at least one row of inserts which extend across at least a portion of the roller.
4. The roller according to claim 3 wherein the at least one row of inserts extends diagonally across the portion of the roller.
5. The roller according to claim 3 or 4 wherein the at least one row of inserts is at least one insert wide.
6. The roller according to claim 3, 4 or 5 wherein the inserts are evenly spaced relative to each other.
7. The roller according to claim 3, 4 or 5 wherein the at least one row of inserts are formed by randomly positioned inserts whereby the overall positioning of the inserts is such that they collectively form a row.
8. The roller according to claim 1 or 2 wherein the first pattern comprises at least one row of inserts which extend from a first side of the roller to a second side of the roller
9. The roller according to any one of claims 3 to 8 wherein the at least one row of inserts extends diagonally across the width of the roller.
10. The roller according to claim 1 or 2 wherein the first pattern comprises at least three rows of inserts which extend from a first side of the roller to a second side of the roller.
11. The roller according to claim 10 wherein the at least three rows of inserts extend diagonally across the width of the roller.
12. The roller according to claim 10 or 11 wherein the at least three rows are staggered relative to each other.
13. The roller according to claim 10, 11 or 12 wherein the inserts of the at least three rows extend above the outer surface at varying heights.
14. The roller according to claim 10, 11, 12 or 13 wherein a first row of the at least three rows extends above the outer surface a greater height than a second row of the at least three rows.
15. The roller according to claim 14 wherein the second row of the at least three rows extends above the outer surface a greater height then a third row of the at least three rows.
16. The roller according to any one of claims 1 to 10 wherein the first pattern is V-shaped.
17. The roller according to claim 16 wherein the V-shape comprises one or more rows of inserts.
18. The roller according to claim 16 wherein the V-shape comprises randomly positioned inserts.
19. The roller according to any one of claims 1 to 10 wherein the first pattern has a plurality of v-shaped formations extending from one side of the roller to the other side.
20. The roller according to claim 19 wherein each v-shaped formation is adjacent another v-shaped formation.
21. The roller according to any one of claims 1 to 20 comprising a set of recesses provided in the outer face of the roller.
22. The roller according to claim 21 wherein the recesses form part of the first pattern.
23. The roller according to any one of claims 1 to 22 wherein the inserts vary in size or shape relative to each other.
24. The roller according to any one of claims 1 to 23 wherein one or more inserts are spaced inwardly from the outer face of the roller.
25. The roller according to any one of claims 1 to 24 wherein the inserts are made from a material harder and of higher wear resistance than the material of the roller’s outer section.
26. A roller for use in material crushing, the roller having an outer face, the outer face incorporating a first pattern therein wherein the first pattern is repeated around the circumference of the roller, the first pattern being repeated in evenly spaced intervals around the circumference of the roller.
27. The roller according to claim 26 wherein the first pattern are formed from one or a combination of a plurality of: inserts extending outwardly from the outer face, grooves, textured sections, indentations, and/or recesses incorporated in the outer face.
28. The roller according to claim 26 wherein the first pattern is formed by raising a section of the outer face.
29. A roller crusher, the roller crusher incorporating a pair of rollers wherein at least one of the pair of rollers is in accordance with any one of the preceding claims, the rollers being supported in parallel spaced apart relationship and driven in contra-rotation such that in use ore fed between the rollers is crushed therebetween.
30. A roller crusher, the roller crusher incorporating a pair of rollers each in accordance with any one of claims 1 to 28, the rollers being supported in parallel spaced apart relationship and driven in contra-rotation such that in use ore fed between the rollers is crushed.
31. A pressure roller for use in semi-autogenous communition of rock materials, the roller having a cylindrical outer face accommodating a set of wear resistance inserts which are arranged across a portion of the outer surface in a first pattern, the inserts being embedded in the surface of the roller, the first pattern being repeated around the circumference of the outer face in an angularly spaced arrangement.
32. A pressure grinding roller, the roller comprising a cylindrical outer face accommodating a set of wear resistance inserts which are arranged in a first pattern over a portion of the outer face, the inserts being embedded in the surface of the roller; wherein the first pattern is repeated around the outer face of the roller.
33. A roller for use in material crushing, the roller having an outer face, the outer surface providing a plurality of irregular surface portions at spaced apart intervals around the circumference of the roller.
34. The roller according to claim 33 wherein the irregular surface portions are one, or a combination of a plurality of: inserts embedded in the outer face, textured surface, indentations, and/or recesses incorporated in the outer face.
35. A roller for use in material crushing, the roller having an outer face accommodating a plurality of inserts, the inserts being arranged in a plurality of varying patterns over the outer face.
36. A roller for use in material crushing, the roller having an outer face accommodating a plurality of inserts, the inserts being arranged in a plurality of repeating patterns over the outer face.