Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1989-08-02
1990-10-30
Lindsay, Robert L.
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 31, 65 8, 65 15, C03B 37035
Patent
active
049666169
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a mineral wool centrifuge comprising a rotatable centrifuge wheel for the defibration of a molten mineral material to be passed on to said centrifuge wheel; a driving motor for the rotation of the centrifuge wheel; a blowing air nozzle blowing air nozzles for applying blowing air to the periphery of the centrifuge wheel for separating mineral fibres from the molten mineral material; and means for applying a binder to the mineral fibres separated from the periphery of the centrifuge wheel.
A conventional mineral wool centrifuge generally comprises three to four centrifuge wheels. The centrifuge wheels form a group in which each centrifuge wheel rotates in a predetermined direction, casting centrifugally molten mineral material from the periphery thereof on to the periphery of an adjacent centrifuge wheel. The entire group is placed in a carriage displaceable on rails under a melting furnace. The carriage further comprises a blower or the carriage is connected to an external blower for producing the blowing air which is passed around the centrifuge wheels in the direction of the axes thereof. By means of the blowing air, the molten mineral material is party extended into fibres and the fibres thus formed are transported into a wool chamber. Each centrifuge wheel is rotated by a separate motor by means of a V-belt drive. The motors are placed under the protective plates of the carriage.
The above-described asymmetric mineral wool centrifuge arrangement and the motors, blowers, air pipes, water cooling means for the centrifuge wheels, etc., comprised therein form a relatively large, clumsy structure. The centrifuge is heavy and thus difficult to handle. It takes plenty of space under the melting furnace and the air flow into a collecting chamber forming an extension thereof is difficult to control. In addition, this kind of mineral wool centrifuge is difficult to maintain.
The object of the present invention is to provide a new mineral wool centrifuge the shape of which in particular is improved and by means of which the above disadvantages can be avoided in a simple manner. This object is achieved by means of a mineral wool centrifuge according to the invention, which is characterized in that the centrifuge comprises an unrotatable body shaft; the driving motor is fastened directly to the end face of the body shaft, whereby the body shaft and the driving motor form a coaxial, fixed, unrotatable whole; and a drive shaft of the driving motor for the rotation of the centrifuge wheel is arranged to extend through the body shaft so that the end portion of the drive shaft protruding from one end of the body shaft is connected to the centrifuge wheel mounted in bearings on the body shaft.
The invention is thus based on the idea that each centrifuge wheel is provided with its own streamlined unit which comprises all means required for defibration and forms a small whole easy to handle so that the defibration operations can be carried out and controlled therewith more easily than previously.
The structure according to the invention enables the introduction of the blowing air to be passed around the centrifuge wheel to be effected in a new way. It is preferable to fasten the blowing air nozzle(s) to the body shaft around it, and the driving motor is surrounded by a tubular shell which extends up to the blowing air nozzle(s) so as to form an annular blowing air channel which extends past the driving motor and is connected to the blowing air nozzle(s). The defibration air advancing in the annular blowing air channel thus simultaneously cools the structures within the shell, particularly the driving motor, whereby it has been preheated when it reaches the centrifuge wheel, which is advantageous in view of the defibration.
By virtue of the unrotatable body shaft the cooling of the centrifuge wheel and the lubrication of the bearings are also easy to arrange.
In addition, the use of the mineral wool centrifuge according to the invention enables the surroundings of the melting furnace of the mineral
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patent: 2398707 (1946-04-01), Hawthorne et al.
patent: 2855626 (1958-10-01), Firnhaber
patent: 3343933 (1967-09-01), Mullan et al.
patent: 3622293 (1971-11-01), Firnhaber
patent: 4046539 (1977-09-01), Pitt
patent: 4342582 (1982-08-01), Porter
patent: 4433992 (1984-02-01), Debouzie et al.
Astrand Erik
Johansson Lasse
Lindsay Robert L.
Oy Partek Ab
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