GB2110954A

GB2110954A - Tool-holding mounting ring for crushing machine rotor

Info

Publication number: GB2110954A
Application number: GB08222296A
Authority: GB
Inventors: Jack Goose; Alan Hartley
Original assignee: Dresser Europe SPRL
Current assignee: Dresser Europe SPRL
Priority date: 1981-12-05
Filing date: 1982-08-02
Publication date: 1983-06-29
Also published as: GB2110954B

Abstract

A cart mounting ring 1, for a rotor assembly of a mineral etc. crushing machine, has a non-circular central aperture 3, and a plurality of tool holders 4, 4A integrally cast into the mounting ring 1. Each tool holder has an aperture 5 to receive a shank of a replaceable tool 6. The invention also includes a rotor assembly comprising a plurality of such rings 1, and also a crusing machine incorporating at least one such rotor assembly. <IMAGE>

Description

SPECIFICATION Mounting ring for crushing machine This invention relates to a mounting ring for a rotor assembly of a crushing machine (which machine may be a sizing machine, comminuting machine, a pulverising machine etc.) adapted to break or crush a product, e.g. mineral etc. from relatively large sized pieces, introduced at an infeed end of the machine, into smaller sized pieces, discharged from an outlet end of the machine. The invention also includes a rotor assembly incorporating a plurality of such mounting rings and to a machine incorporating one or more such rotor assemblies.

Conventionally, mounting rings for rotor assemblies are produced by casting or by machining, the rings having firstly a central aperture, usually of non-circular shape e.g. hexagonal, for fitting on a drive shaft of corresponding external profile, and secondly an external periphery around which are welded a plurality of holders for replaceable breaking or crushing tools (hereinafter referred to as tools). Usually the tools are tipped with hard material e.g. tungsten carbide, for enhanced wear resistance, the tool having a shank to fit into an aperture in each tool holder, with some releasable latching means to retain a shank within its aperture.The welding of a plurality of tool holders around the periphery of a mounting ring isextremelytime-con- suming and hence results in a relatively costly mounting ring Furthermore, the size of material discharged from the machine outlet end is to a larger extent controlled by the numbers of tools provided, and it is not always possible to provide the optimum number of tools for the desired size of crushed product because of the inability to provide in the available space the optimum number of tool holders and yet leave sufficient space for the welding thereof. A greater number of tool holders could be provided only if one resorted to the less satisfactory solution of employing less robustsmallertools and smaller tool holders.

According to a first aspect of the present invention, there is provided a mounting ring, for a rotor assembly of a mineral etc. crushing machine, which ring is produced by casting, with a non-circular central aperture, and with a plurality of tool holders integrally cast into the mounting ring and each provided with an aperture to receive a shank of a replaceable tool.

According to a second aspect of the present invention, there is provided a rotor assembly for a mineral etc. crushing machine comprising a plurality of mounting rings as defined above.

According to a third aspect of the presentinven- tion, there is provided a crushing machine incorporating at least one rotor assembly as defined above.

Thus, the invention obviates the need for any welding operations whatsoever on a mounting ring, and in addition to providing this saving in welding time also results in an ability to provide (for the same size of tool) a greater number of tool holders on a mounting ring than it would be possible to provide by the conventional welding technique, for the tool holders may be located in close proximity, rather than having to be mutually spaced not for any crushing effect but merely to allow welding to be effected. It is of course necessary to effect machining, or finish machining, of the tool shank receiving apertures in the tool holders, but this is an operation which in any event was required for welded-on tool holders.

In one preferred embodiment, a mounting ring in accordance with the invention is provided with ten integral tool holders. Of these, it is also preferred for two diametrically opposed tool holders to be located at a greater radial distance from the axis of rotation of the mounting ring than the remaining eight tool holders. This has the advantageous effect of encouraging material to be crushed into the path of other tools. The machine according to the invention may incorporate a single rotor assembly adapted to crush against a static anvil, or alternatively may incorporate a pair of co-operating rotor assemblies, contra-rotatable about parallel axes, with adjacent peripheries defining a nip into which material to be crushed is fed.

It is also preferred for the non-circular aperture of each mounting ring to be pentagonal.

The invention will now be described in greater detail, by way of examples, with reference to the accompanying drawings, in which: Figure lisa side elevation of a first embodiment of mounting ring in accordance with the invention; Figure 2 is a section on the line ll-ll of Figure 1; Figure 3 is a side elevation of a second embodiment of mounting ring and rotor assembly in accordance with the present invention; and Figure 4 is a section on the line IV-IV of Figure 3.

In the drawings of both embodiments, like reference numerals are employed for like components.

In the drawings, a mounting ring 1 rotatable, in service about an axis 2, is produced by casting with a pentagonal central aperture 3 and with a plurality of tool holders 4 integrally cast into the mounting ring 1. Each tool holder 4 is provided with a circular aperture 5 to receive an appropriately profiled shank of a replaceable, tungsten carbide tipped tool 6 of conventional design. Each aperture 5 has an enlarged groove 7 to receive an expandable collar mounted on the tool shank, to latch the tool in the tool holder 4, while each aperture 5 is intersected by a bore 8 through which a drift may be inserted to engage the shank to extract a tool 6 from its holder, when tool replacement is required.

In the embodiment of Figures 1 and 2, ten integral tool holders 4 are provided, and of these, two diametrically opposed tool holders indicated by reference numeral 4A are located at a greater radial distance from the axis of rotation 2 ofthe mounting ring 1.

In the embodiment of Figures 2 and 3, all ten integral tool holders 4 of each mounting ring 1 are located at the same radial distance from the axis of rotation 2, the holders 4 of one mounting ring I being located in a staggered relationship with respectto the holders 4 of an adjacent mounting ring 1, as can be seen from Figure 3. As can be seen from Figure 4, an endmost mounting ring 1 B is provided with a circular recess 9 to receive an abutment collar 10 fixed to a shaft 11 of a rotor assembly, the other endmost bearing ring 1C being provided with a similar circular recess 12 to receive an adjustable clamping collar 13 whereby a pack of eleven mounting rings may be firmly clamped together on the shaft 11, the latter, over its length L having a pentagonal profile between its circular section ends 14.

Claims

1. A mounting ring, for a rotor assembly of a mineral etc. crushing machine, which ring is produced by casting, with a non-circular central aperture, and with a plurality of tool holders integrally cast into the mounting ring and each provided with an aperture to receive a shank of a replaceable tool.

2. A ring as claimed in Claim 1, provided with ten integral tool holders.

3. A ring as claimed in Claim 2, wherein two diametrically opposed tool holders are located at a greater radial distance from the axis of rotation of the mounting ring than the remaining eight tool holders.

4. A ring as claimed in any preceding Claim, wherein the non-circular aperture of each mounting ring is pentagonal.

5. A mounting ring substantially as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.

6. A mounting ring substantially as hereinbefore described with reference to Figures 3 and 4 of the accompanying drawings.

7. A rotor assembly for a mineral etc. crushing machine comprising a plurality of mounting rings as defined in any preceding Claim.

8. A rotor assembly substantially as hereinbefore described with reference to Figures 3 and 4 of the accompanying drawings.

9. A crushing machine incorporating at least one rotor assembly as defined in Claim 7 or Claim 8.