Device to drive a body that carries out a tumbling and rotating

Solid material comminution or disintegration – Apparatus – Combined or convertible

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Details

74660, 2411997, 241205, 366287, B02C 1900

Patent

active

047843381

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a device for driving a body which is suspended from two forked control gimbals by means of pivots for motion around two axes that are skewed with respect to one another, the body carrying out a tumbling and rotating motion based on the principle of the invertable link chain. Each control rod is connected to a shaft by means of the respective swivel bearing.
To assure that the body carries out the tumbling and rotating motion, at least one of the two parallel shafts is driven in a manner that the second shaft rotates due to the connection of the two shafts by means of the members of the link chain, comprising the control gimbals and the body.
However, the kinematics of the invertable link chain requires that the two shafts must rotate opposite to another and alternately with periodically alternating increasing and decreasing angular frequency if the object is to attain a regular motion of the simultaneously rotating and tumbling body hung on the control rods.
The body itself can serve as a container to accommodate the materials treated, which are subject to physical or chemical processes, achieving especially good effects with respect to the course of such processes due to the simultaneous tumbling and rotational motion. In particular, it can be used in the preparaton of mixtures whose components to be mixed are finely distributed, e.g., the mixing of very sensitive fine powders with lubricants for the extrusion of a paste or with color pigments, the powders being used in the production of plastic. Furthermore, the purpose of the body can be to homogenize, emulsify, or prepare powder mixtures such as for example a dry powdered metal.
Especially good effects are achieved with an oloidal body, which is a control body with two convex corners, that have the same constant curvatures and are in two orthogonal planes, whereby a casing surface has overall straight surface lines between these corners. In known oloidal bodies the motion is such that there is no change point with respect to the path already taken along the path of trajectory of the point of the oloid. The three dimensional path of trajectory of all points of the moved body is the explanation for the good mixing results when using such a body.
The same body, however, can also achieve the same good effects in processed materials, which surround the body, i.e., when used as a stirring member. Due to the special nature of its motion, as described above, the body is superior to any other merely rotating stirring member in which one must accept a separation due to centrifugal action and a shearing stress on the substance to be stirred due to the vortex formation and due to the high energy consumption corresponding to the generation of turbulent currents.
No shearing action occurs with the tumbling and rotating body described above when used as a stirring member in a liquid; the motion occurs without any break in the flow at the ends of the body and without the turbulence associated therewith. In the resulting motion of the liquid, air or oxygen that has been introduced is immediately dispersed and distributed homogeneously. Therefore, the device in a preferred embodiment is suitable for sanitizing water through the introduction of oxygen. This is only one of the numerous possibilities for its application.
The drive of the body via at least one shaft, or for a larger body and corresponding performance preferrably both parallel shafts, presents a number of technical problems due to the acceleration or delays required alternately at both shafts.
For the drive of just one shaft in a so-called pendulum drive, known from Ch-PS No. 496 912, a pivotable pendulum that is connected to the drive shaft is arranged to pivot on the same drive shaft. A control body which is automatically coupled with the shaft and is preferrably shaped like a crank which is pivoted at the pendulum, is on the pendulum. In operative connection with at least one reference point of the device, the crank causes a periodic, swiveling motion

REFERENCES:
patent: 11109 (1854-06-01), Ambler
patent: 2302804 (1942-11-01), Schatz
patent: 4669225 (1987-06-01), Kuster

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