The Refiner DSR was produced by former exisiting company Escher Wyss which was taken over by Voith . It was available in three sizes DSR 1 / DSR 2 /DSR 3 and also in 2 different versions type CP and type HEP.
It is suitable for any pumpable suspension up to a consistency of approx. 6 % . Depending on the kind of fibre stock and the required stock and sheet characteristics, the refiner DSR is suitable for either fibrillating, cutting or brushing of fibres. The refiner can be adapted to a variety of tasks by various refiner fillings and the possibility of adjusting the specific edge load.
The fibre stock is passed through the inlet to the refining areas in either single or double flow. A satisfactory exchange of stock between rotor and stator is effected due to a suitable design of the flow cross section of the refiner filling, refining surface and edge length. The necessary buffer of stock is thus built up between the refining surfaces ensuring exceptionally uniform fibre treatment. The space between rotor and stator controls the refining results and can be precision adjusted by
means of the mechanical adjusting device. The power consumption varies with the space between the refining discs as does the specific edge load. Consequently the power consumption can be used as measure for the actual beating effect of the refiner. By the new way of stock flow in the machine, the stock pressure acts on the adjustable stator from both sides. In this way, the load is largely removed from the mechanical adjusting device and it only has to transmit axial forces for adjustment of the beating output.
The double-disk refiner type SDM is used for the refining of pulps, defibered semi-chemical pulps, straw pulp, secondary fibers and fiberboard stock.
Design and Principle of Operation
The double-disk refiner consists of a housing with a hinged housing cover bolted to its tending side. An adjustable press cover and the associated adjusting gear are mounted inside the housing cover. The adjusting gear essentially consists of a screw jack driven by a pole-changing electric motor; the screw jack shifts cover in axial direction. Running in roller bearings, shaft carries an axially adjustable rotor, fitted with refining disks on either side. The torque is transmitted by the positive locking of the spline shaft teeth. The stator-side refining disks, together with the refining disks of the rotor form a double-disk tackle. As the rotor is axially adjustable, the tackle forms a self-contained system of forces. Therefore, the bearings are not affected by the axial forces set up as refining disk positioning torque. As the double-disk tackle is positioned by axial adjustment of the refining disk, the distance between the two stator disks is varied. While the stock is entering and in the case of small gap width, the axially adjustable rotor assumes, due to the equilibrium of hydraulic forces, a central position between the two stator-side halves of the tackle so that the gap widths on both sides are approximately the same. For smaller throughputs, the stock enters the refiner through an inlet elbow, while for normal and larger throughputs it is fed through both inlet elbow and inlet branch of the refiner tackle, see Fig. 1 and 2…
The manual book in German language of the Voith 05 SDM Refiner is available under this link. (Password is required)