Agitating – With specified discharge means – By endless belt or screw conveyor
Patent
1995-09-11
1997-07-08
Jenkins, Robert W.
Agitating
With specified discharge means
By endless belt or screw conveyor
366299, 366603, B01F 704
Patent
active
056453450
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to apparatus for mixing and dispensing fibrous type material, for example, forage, which includes hay, straw, silage and in particular, relatively long cut silage and the like, which is commonly used in the preparation of an animal feed ration. The apparatus is of the type which comprises a container defining a hollow interior region which forms an elongated mixing compartment of substantially semi-circular transverse cross-section defining a longitudinally extending main central axis which is co-axial with the axis of generation of the semi-circular portion of the mixing compartment, a mixing rotor being rotatable in the mixing compartment about a rotational axis coinciding with the main central axis, the mixing rotor comprising at least one mixing paddle for mixing material in the mixing compartment, the mixing paddle extending substantially longitudinally relative to the main central axis and having a leading surface extending substantially longitudinally and radially relative to the main central axis and terminating in an outer free edge extending in a generally longitudinal direction and defining an outer peripheral edge of the mixing paddle.
Such apparatus for mixing and dispensing animal feed rations, in general, is referred to as a mixer feeder wagon. A typical example of such apparatus is disclosed in British Patent Specification No. 2,139,911A and European Patent Specification No. 0,427,483A. Such mixer feeder wagons comprise a mixing compartment and a dispensing compartment which communicates with the mixing compartment. A mixing rotor is rotatably mounted in the mixing compartment for mixing the ingredients of the feed ration therein. A dispensing means, typically, a dispensing auger is located in the dispensing compartment for dispensing the mixed feed ration from the dispensing compartment through a dispensing outlet from the dispensing compartment. Typically, the mixing compartment is formed by a base of semi-cylindrical shape and the mixing rotor is rotatably mounted in the mixing compartment with the rotational axis of the mixing rotor coinciding with the axis of generation of the semi-cylindrical base. The mixing rotor comprises a main rotor shaft and a plurality of peripherally located mixing paddles carried on carrier members which extend radially from the mixing shaft. Each mixing paddle is formed by an elongated angle member comprising a pair of webs extending at 90.degree. to each other. One web defines a leading surface which extends longitudinally and radially relative to the rotational axis of the mixing rotor, and extends radially inwardly from the other web which forms a trailing surface which is tangential to the locus of movement of the outer peripheral edge of each paddle. Accordingly, as the mixing rotor rotates in the mixing compartment the trailing surface sweeps past the semi-cylindrical base portion of the mixing compartment. While this type of mixing and dispensing apparatus with such mixing paddles is quite adequate for mixing the ingredients of most animal feed rations, it has been found in certain circumstances that where the animal feed comprises ingredients of relatively high fibrous content, for example, hay, straw and long cut silage, and in particular, where the ingredients of the animal feed ration are relatively dry, fibrous material may collect on the mixing paddles and it has been found that such fibrous material extends rearwardly over the trailing surface of each mixing paddle. It has been found that the interaction between the collected fibrous material on the trailing surface of each mixing paddle and the semi-cylindrical base of the mixing compartment causes significant frictional resistance between the mixing rotor and the semi-cylindrical base, which in turn significantly increases the power requirement to rotate the mixing rotor. This problem has been found to arise in particular, where the feed ration comprises relatively dry fibrous material, such as, silage and is of dry matter content of 30% and greater, and in parti
REFERENCES:
patent: 2813704 (1957-11-01), MacKissic
patent: 4298289 (1981-11-01), Walley
patent: 4310252 (1982-01-01), Ryan
patent: 4597672 (1986-07-01), Neier
patent: 4756626 (1988-07-01), Neier
Foley Thomas
O'Neill Oliver
Jenkins Robert W.
Salford Engineering Limited
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