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QINGDAO JBD MACHINERY CO., LTD
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A Twin screw extruder drive system includes a pair of parallel juxtaposed output shafts each of which is fixed to a sun gear of a planetary gear set. Each gear set includes a plurality of planet idler gears which are only rotatable about their axes and engage both the sun gear and a ring gear. Symmetrically disposed about the circumference of the ring gear are at least two drive pinions. The two gear sets have parallel axes and are axially offset from one another with the output shafts extending through a space between the planet gears of the other gear set. In one embodiment each drive pinion is driven by a separate electric motor and all motors are electronically and mechanically speed synchronized. A single electric motor is employed to drive all drive pinions in an alternate configuration.
Claims
Having thus described the invention, there is claimed as new and desired to be secured by Letters Patent:
1. A drive system suitable for a twin screw extruder having a pair of adjacent parallelaxis extruder screws, the drive system including two adjacent parallel axis output shafts, each engageable with one of the extruder screws and separate gear train means for driving each output shaft, the gear train means having parallel axes which areadjacent one another, one gear train means being spaced axially behind the other gear train means, each gear train means including a planetary gear set, each planetary gear set comprising a ring gear, a plurality of drive pinions, means journalling thedrive pinions for rotation about fixed axes, the drive pinions being in driving engagement with the ring gear, the drive pinions being equidistantly spaced from one another along the periphery of the ring gear, each planetary gear set further including aplurality of planet gears and a sun gear, the planet gears being equidistantly spaced from one another along the periphery of the ring gear, means journalling each planet gear for rotation about a fixed axis, the sun gear axes of the two planetary gearsets being adjacent and parallel to one another and means interconnecting the sun gear of each gear set with one of the output shafts whereby relatively high driving torques are provided.
2. A drive system suitable for driving a twin screw extruder as constructed in accordance with claim 1 wherein each ring gear includes internal teeth and external teeth, the drive pinions being in intermeshing tooth engagement with the externalteeth and the planet gears being in intermeshing tooth engagement with the internal teeth.
3. A drive system suitable for driving a twin screw extruder as constructed in accordance with claim 1 further including bearing-free means for supporting the ring gear for rotation about the axis of the sun gear, the bearing-free supportingmeans comprising the engagement between the ring gear and the planet gears.
Claims
Having thus described the invention, there is claimed as new and desired to be secured by Letters Patent:
1. A drive system suitable for a twin screw extruder having a pair of adjacent parallelaxis extruder screws, the drive system including two adjacent parallel axis output shafts, each engageable with one of the extruder screws and separate gear train means for driving each output shaft, the gear train means having parallel axes which areadjacent one another, one gear train means being spaced axially behind the other gear train means, each gear train means including a planetary gear set, each planetary gear set comprising a ring gear, a plurality of drive pinions, means journalling thedrive pinions for rotation about fixed axes, the drive pinions being in driving engagement with the ring gear, the drive pinions being equidistantly spaced from one another along the periphery of the ring gear, each planetary gear set further including aplurality of planet gears and a sun gear, the planet gears being equidistantly spaced from one another along the periphery of the ring gear, means journalling each planet gear for rotation about a fixed axis, the sun gear axes of the two planetary gearsets being adjacent and parallel to one another and means interconnecting the sun gear of each gear set with one of the output shafts whereby relatively high driving torques are provided.
2. A drive system suitable for driving a twin screw extruder as constructed in accordance with claim 1 wherein each ring gear includes internal teeth and external teeth, the drive pinions being in intermeshing tooth engagement with the externalteeth and the planet gears being in intermeshing tooth engagement with the internal teeth.
3. A drive system suitable for driving a twin screw extruder as constructed in accordance with claim 1 further including bearing-free means for supporting the ring gear for rotation about the axis of the sun gear, the bearing-free supportingmeans comprising the engagement between the ring gear and the planet gears.
4. A generate method appropriate for producing a twin screw extruder as produced in accordance with declare three wherein the supporting shows even more comprises the engagement between the ring materials as well as the generate pinions.
5. A generate method appropriate for just about any twin screw extruder as produced in accordance with declare one even more which consists of separate electric powered engine shows in producing engagement with every sole generate pinion.
6. A generate method appropriate for just about any twin screw extruder as produced in accordance with declare 5 even more which consists of shows for synchronizing the speeds inside the electric powered motors, the synchronizing shows comprising an electronic synchronization circuit.
7. A generate method appropriate for just about any twin screw extruder produced in accordance with declare one even more which consists of materials shows for synchronizing the generate pinions of the two planetary materials sets.
8. A generate method appropriate for just about any twin screw extruder produced in accordance with declare 7 wherein the synchronizing materials shows comprises interengaged gears interconnecting a generate pinion of the sole planetary materials arranged getting a generate pinion of theother planetary materials set.
9. A generate method appropriate for just about any twin screw extruder produced in accordance with declare 6 even more which consists of auxiliary materials shows for synchronizing the generate pinions of the two planetary materials sets.
10. A generate method appropriate for just about any twin screw extruder produced in accordance with declare one even more which consists of an electric powered engine and materials shows drivingly interconnecting the electric powered engine with every sole inside the generate pinions.
11. A generate method appropriate for producing a twin screw extruder produced in accordance with declare one which consists of two generate pinions associated to every sole planetary materials set, the generate pinions getting spaced from the sole one more at diametrically opposedpositions relative for that ring gear.
12. A generate method appropriate for just about any twin screw extruder produced in accordance with declare one wherein the shows journalling the sunlight materials for rotation about a repaired axis consists of a sunlight materials shaft, the sunlight materials getting repaired for that sunlight materials shaft,the sunlight materials shaft of every sole planetary materials arranged extending by means of a space between the planet gears within one other planetary materials set.
13. A generate method appropriate for just about any twin screw extruder produced in accordance with declare twelve wherein every sole sunlight materials shaft comprises the output shaft.
14. A generate method produced in accordance with declare 13 wherein the extruder screws exert axial thrust concerning the sunlight materials shafts, the generate method even more which consists of thrust bearing shows associated to every sole sunlight materials shaft and thrust bearingsupport means, the thrust bearing shows getting interconnected using the trhrust bearing help means, the thrust bearing shows getting positioned intermediate the generate pinion.
15. A generate method produced in accordance with declare 14 even more which consists of separate engine shows in producing engagement with every sole generate pinion, the thrust bearing help shows positioned between the separate engine shows whereby a spaceconserving configuration is obtained.
16. A transmission generate method appropriate for just about any twin screw extruderhaving a pair of adjacent parallel axes, the transmission generate method which consists of two adjacent parallel axes putput shafts, every sole engageable with between the extruder screws and apair of planetary materials trains, every sole materials educate which consists of a ring gear, a plurality of planet gears engaging the ring gear, shows rotatively mounting every sole planet materials about a repaired axis, every sole planetary materials educate even more which consists of a sunlight gear, every sole planetgear engaging a sunlight gear, every sole output shaft extending by means of the ring gears, every sole sunlight materials getting mounted for rotation coaxially and non-rotatively with an output shaft, a minimum amount of two generate pinions engaging the periphery of every sole ring gear, the drivepinions getting equidistantly spaced from the sole another, separate engine shows engaging every sole generate pinion and shows for synchronizing the output speeds inside the engine means.
17. A transmission generate method produced in accordance with declare 16 wherein the engine shows comprise an electric powered motor, the shows for synchronizing comprising electric powered means.
18. A transmission generate method produced in accordance with declare 16 wherein the shows for synchronizing comprises materials means.
19. A transmission generate method produced in accordance with declare 18 wherein the materials shows interconnects the generate pinion of the sole materials educate with generate pinion within one other materials train.
20. A transmission generate method produced in accordance with declare 16 even more comprising bearing zero price tag shows for rotationally carrying every sole ring gear, the shows for rotationally carrying every sole ring materials comprising the engagement between eachring materials and its generate pinions and planet gears.
5. A generate method appropriate for just about any twin screw extruder as produced in accordance with declare one even more which consists of separate electric powered engine shows in producing engagement with every sole generate pinion.
6. A generate method appropriate for just about any twin screw extruder as produced in accordance with declare 5 even more which consists of shows for synchronizing the speeds inside the electric powered motors, the synchronizing shows comprising an electronic synchronization circuit.
7. A generate method appropriate for just about any twin screw extruder produced in accordance with declare one even more which consists of materials shows for synchronizing the generate pinions of the two planetary materials sets.
8. A generate method appropriate for just about any twin screw extruder produced in accordance with declare 7 wherein the synchronizing materials shows comprises interengaged gears interconnecting a generate pinion of the sole planetary materials arranged getting a generate pinion of theother planetary materials set.
9. A generate method appropriate for just about any twin screw extruder produced in accordance with declare 6 even more which consists of auxiliary materials shows for synchronizing the generate pinions of the two planetary materials sets.
10. A generate method appropriate for just about any twin screw extruder produced in accordance with declare one even more which consists of an electric powered engine and materials shows drivingly interconnecting the electric powered engine with every sole inside the generate pinions.
11. A generate method appropriate for producing a twin screw extruder produced in accordance with declare one which consists of two generate pinions associated to every sole planetary materials set, the generate pinions getting spaced from the sole one more at diametrically opposedpositions relative for that ring gear.
12. A generate method appropriate for just about any twin screw extruder produced in accordance with declare one wherein the shows journalling the sunlight materials for rotation about a repaired axis consists of a sunlight materials shaft, the sunlight materials getting repaired for that sunlight materials shaft,the sunlight materials shaft of every sole planetary materials arranged extending by means of a space between the planet gears within one other planetary materials set.
13. A generate method appropriate for just about any twin screw extruder produced in accordance with declare twelve wherein every sole sunlight materials shaft comprises the output shaft.
14. A generate method produced in accordance with declare 13 wherein the extruder screws exert axial thrust concerning the sunlight materials shafts, the generate method even more which consists of thrust bearing shows associated to every sole sunlight materials shaft and thrust bearingsupport means, the thrust bearing shows getting interconnected using the trhrust bearing help means, the thrust bearing shows getting positioned intermediate the generate pinion.
15. A generate method produced in accordance with declare 14 even more which consists of separate engine shows in producing engagement with every sole generate pinion, the thrust bearing help shows positioned between the separate engine shows whereby a spaceconserving configuration is obtained.
16. A transmission generate method appropriate for just about any twin screw extruderhaving a pair of adjacent parallel axes, the transmission generate method which consists of two adjacent parallel axes putput shafts, every sole engageable with between the extruder screws and apair of planetary materials trains, every sole materials educate which consists of a ring gear, a plurality of planet gears engaging the ring gear, shows rotatively mounting every sole planet materials about a repaired axis, every sole planetary materials educate even more which consists of a sunlight gear, every sole planetgear engaging a sunlight gear, every sole output shaft extending by means of the ring gears, every sole sunlight materials getting mounted for rotation coaxially and non-rotatively with an output shaft, a minimum amount of two generate pinions engaging the periphery of every sole ring gear, the drivepinions getting equidistantly spaced from the sole another, separate engine shows engaging every sole generate pinion and shows for synchronizing the output speeds inside the engine means.
17. A transmission generate method produced in accordance with declare 16 wherein the engine shows comprise an electric powered motor, the shows for synchronizing comprising electric powered means.
18. A transmission generate method produced in accordance with declare 16 wherein the shows for synchronizing comprises materials means.
19. A transmission generate method produced in accordance with declare 18 wherein the materials shows interconnects the generate pinion of the sole materials educate with generate pinion within one other materials train.
20. A transmission generate method produced in accordance with declare 16 even more comprising bearing zero price tag shows for rotationally carrying every sole ring gear, the shows for rotationally carrying every sole ring materials comprising the engagement between eachring materials and its generate pinions and planet gears.
