Crushing machine with rotor

Details Crushing machine with rotor Crushing machine with rotor

1996-09-25

2000-03-28

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Rotary striking member, rotor structure

241194, B02C 1326

Patent

active

060420359

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The invention relates to a crushing machine with rotor.


STATE OF THE ART

Such crushing machines or comminution machines are known in various constructions and for various materials. For example, types of construction exist, wherein the support bodies for the comminution tools are comprising a spider rotor or also a single-part rotor body. A particularly advantageous construction is the swing hammer crusher according to the German printed patent document 2,605,751, wherein the rotor of the swing hammer crusher comprises several disks, plugged onto a shaft and fixed against rotation, and of hammers disposed distributed between these disks, wherein the hammers are supported movable in rotation.
The recited comminution machines serve for the comminution of metallic and non-metallic material or of a mixture between these two types of materials and in nearly each case comprise a fixedly disposed housing, wherein the rotor is rotatably supported in said housing. In general, a so-called anvil is disposed at the inner side of the housing; and in fact preferably at the input of the housing, where the anvil cooperates in the case of the swing hammer crusher according to the recited patent with the striking tools or hammers, disposed movably at the rotor. In general, the rotor, coupled with a fast rotating drive, is for this purpose equipped with a plurality of axles, where the axles are disposed parallel to the rotor shaft and wherein, however, the axles are staggered eccentrically relative to the rotor shaft, wherein the hammers or the rotor tools are supported freely rotatable on the axles. The comminuting is performed by the coaction of the rotor hammers both with the fixedly disposed anvil at the input of the material and with the inner wall of the housing, which has the function of a counter tool, and against which housing inner wall the material is thrown or at least in a part area of the rotor circumference also is squeezed or, respectively, torn between the housing inner wall and the comminution tools.
The rotor hammers are distributed in any suitable way at the circumference of the rotor at a distance relative to each other. In order to generate this distance, the rotor body is formed of a plurality of disks, which are all connected to the rotor shaft fixed against rotation.
In particular in those cases where the material to be comminuted comprises completely or in part metal, the outer faces of the disks, between which disks the rotor hammers are swivelably supported, suffer substantial wear damages based on rubbed-off parts and impinging of the material pieces. After a relatively short operating time, so much metal is then ripped off or ground off from the circumference of the disk that the disks become unusable and have to be exchanged or have to be built up by welding in an expensive way.
The proposal according to the recited patent avoids this disadvantage by furnishing protective shields comprising of a particularly wear-resistant material or also so-called protective caps, which are essentially formed in each case out of a circular-ring segment-shaped covering part and in each case of a bearing hub, furnished at the inner side of the covering part, and which covering parts are attached with the bearing hubs on the axial rods, and wherein the protective shields or protective caps cover with their covering parts the circumferential areas of the respective neighboring disks.
While this kind of construction of swing hammer crushers has proven itself useful in practice already for already two decades in an extremely wide range, it is nevertheless to be considered that both the known protective caps as well as the comminution tools, i.e. in the case of this swing hammer rotor, the hammers are cast such that these parts are not only relatively expensive in their production, but require also the relatively greater tolerances of casting, which have to be taken into consideration during the assembly of the machine and the mounting of the recited parts.
Furthermore, the wear of hammers and pr

REFERENCES:
patent: 1785435 (1930-12-01), Bullock
patent: 2712417 (1955-07-01), Jensen
patent: 3612420 (1971-10-01), Hull
patent: 3659793 (1972-05-01), Stephenson et al.
patent: 4613088 (1986-09-01), Hausler et al.
patent: 5188303 (1993-02-01), Hoof

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