Solid material comminution or disintegration – Apparatus – Comminuting surface deformable by contact with material
Patent
1997-02-19
1997-12-16
Husar, John M.
Solid material comminution or disintegration
Apparatus
Comminuting surface deformable by contact with material
241162, 241193, B02C 1316, B02C 1326
Patent
active
056975635
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a chain beating type crusher and, more particularly, to a chain beating type crusher which belongs to the beating type crusher and which crushes an object to be processed by beating it with chains revolving at a high speed.
TECHNICAL BACKGROUND
As the crusher, a variety of mechanisms are available, but they require several steps for finely crushing a large mass as an object. Among the beating type crushers is, for instance, a hammer mill which crushes an object with a beating action of rotating blades. The hammer mill, however, has a problem in the durabiity of the blades because the blades are damaged when a hard object is processed.
As a variety of the beating type crushers for crushing an object with a beating action, chain beating type crushers have recently been used which crush an object with a beating action of chains revolving at a high speed. In such a chain beating type crusher, an object charged from above into a multistage beating zone, which has successive beating zones or stages each formed by a plurality of beating chains revolving at a high speed, is allowed to fall due to the own weight, so that it is beaten and crushed in the successive beating zones formed one below another in the falling direction. In this chain beating type crusher, the falling speed of the object and the speed of revolution of the beating chains are related such as to obtain desired crushing. Theoretically, when the time required for the object to pass through one stage of the beating zone which is formed by a plurality of beating chains revolving at a high speed is set equal to the time required for the beating chains to revolve once, the number of times of beating of the object during the passage thereof through one stage is equal to the number of the beating chains in one stage, and the object is beaten a number of times, which is the product of the number of times of beating in one beating zone stage multiplied by the number of the successive beating zone stages. Also in this chain beating type crusher, a crusher vessel thereof has a steel-made peripheral wall, which has a greater radius than the length, to which the beating chains caused to revolve at a high speed about an axis of revolution are stretched by the centrifugal force in a revolving direction perpendicular to the axis of revolution. This peripheral wall can prevent the object from being scattered by the centrifugal force to the outside of the crusher vessel.
In the prior art chain beating type crusher, however, the considerable part of the object falls along the inner surface of the peripheral wall of the crusher vessel without receiving the theoretical number of beatings by the beating chains revolving at a high speed. That is, the number of times the object is beaten is greatly reduced.
A first object of the invention is to provide a chain beating type crusher, which can overcome the above drawback and is adapted to give an object the theoretical number of times of beating actions by the beating chains revolving at a high speed, thus increasing the crushing efficiency.
A second object of the invention is to provide a chain beating type crusher for crushing an object with a beating action of beating chains revolving at a high speed which permits finer crushing of the object.
The conventional chain beating type crusher for crushing an object with a beating action of beating chains revolving at a high speed has a different problem. Portions of the beating chains that are mounted on the shaft are subject to severe wear caused in a long operation by the centrifugal forces of the beating chains and the high beating impact force of beating. In actual use of this chain beating type crusher, therefore, it is necessary to reduce the wear of the beating chain portions mounted on the shaft as much as possible.
A third object of the invention is to provide a chain beating type crusher, which can solve the above problem and in which the wear of the beating chain portions mounted on the shaft is reduced as much as poss
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Fujimoto Shigeo
Ito Michio
Husar John M.
Kabushiki Kaisha Fujimoto Pollcon
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