The gear for Twin Screw Extruder
having a first output shaft which is driven by Single Screw Extruder
a drive shaft and a second output shaft which is driven by the first output shaft via two side shafts which are arranged on both sides. The junction plane extends between the axes of the two output shafts.To be sure, gearboxes with a vertical junction plane are known from the state of the technology. However, this vertical junction plane extends perpendicular to the axes for the output or side shafts, wherein up to four gearbox case parts are arranged one after another. This design also has the additional significant disadvantage that in order to open the gearbox case, the shafts and their bearings must first be removed sheet production extruder
from the rolling bearing seats, thereby making access to the gear very difficult and complicated. The initial installation of the gear is correspondingly complicated.
All these disadvantages of the state gear pump
of the technology are avoided for the gear according to the invention as a result of the favorable arrangement of the junction plane. Owing to the fact that the rolling bearing seats are not positioned in the gearbox case until later on, in a precise adaptation to the respective application case, the axial spacing of the output shafts can be changed continuously over a larger range, without requiring a new gearbox case or individual new gearbox case parts.
Thus, the essential advantage of this design is that any axial spacing desired by the client can be realized over a wider range and that despite the varied axial spacing, only the two equal gearbox case halves are necessary for this. In other words, it is not necessary to provide new, separate gearbox case parts for different axial spacings, but only to provide new bores in the complete gearbox case.
Also, the same gear train consisting of the same gearing parts can be used, even for varied axial spacings. Neither the side shafts, nor the output shafts are fixed exactly in their position relative to the junction plane. The position of the rolling bearing seats is in turn adapted to this and they are subsequently drilled into the gearbox case. In other words, the present invention makes it possible to use the same gear train with all its individual parts for many different application cases since the position of the rolling bearing seats is independent of the junction plane.
On the whole, this leads to a strong decrease in the parts variety and a corresponding increase in the lot sizes for the individual parts and thus to considerable cost-savings on the whole.
Furthermore, the spectrum of axial spacings required by the market can also be supplied without interruption by the present invention for a specific rotational moment range in that the axial spacings for various gear sizes overlap. Another advantage of the present invention is that only two casting patterns are therefore still required for a complete gearbox case and this for a plurality of axial drive shaft spacings, The gear according to the invention with the vertical junction plane also makes it possible to integrate the reducing section into the gearbox case so that a separate gearbox case need no longer be provided for the reducing section. Thus, the complete gear only needs two patterns. The distance piece for the output shaft is the only Twin Screw Extruder
that must be poured or produced separately, as for the state of the technology.
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