The drive unit for double-roll waste shredder
This is my bachelor thesis. The work contains basic description of shredding process. It also contains a list of usually used shredders with their construction design.
The next section is about design drive unit. First is design of powertrain, coupling and then design of transmission. Gearbox consists from design gears, bearings and shafts. These components are checked for durability and strength. Countershaft is controlled for static a dynamic strength.
The gearbox with electric motor and flexible clutch
Cutting segments
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cutting and slicing
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strips or pieces of waste
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large tensile stress
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Line for waste recycling
Shredding:
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wood, paper, textiles, oil filters, tires, plastics and electrical waste
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hour capacity between 1500 to 2500 kg / hour
Design of shredder attributes
Double-roll waste shredder
Electric motor Siemens
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Power 30 kW
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6 pols
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Speed 980 min
-1
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Computational clutch torque Mv = 878 Nm
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Nominal torque
Mkn = 1250 Nm
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Maximum torque Mkmax = 2560 Nm
Flexible coupling KTR – ROTEX 75
Claw clutch SIT – SITEX ST-C
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Computational clutch torque
Mv =15 320 Nm
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Nominal torque
Mkn = 24 000 Nm
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Maximal torque
Mkmax=48 000 Nm
The drive unit
Transmission
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Gear ratio = 5,71
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Gear module = 2,5
Number of teeth:
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The first gear = 21
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The second gear = 120
The first gear set
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Gear ratio = 3,17
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Gear module = 5
Number of teeth:
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The third gear = 17
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The fourth gear = 54
The second gear set
The axial distance of the shafts is 180 mm.
Control of the coutershaft
Coaxial gearbox
