Table 1

Geometric information about the screw

Segment A B C D E F G H I J K L
Inlet diameter (mm) 68 68 73 73 81.5 81.5 84 84 86 86 89 89
Outlet diameter (mm) 68 73 73 81.5 81.5 89 84 91 86 95 89 93.5
Length (mm) 152 38 65 30 75 25 75 30 70 25 85 110
Rotation of the thread (°) 716 284 396 446 401 536
Pitch of the screw (mm) 70 50 45 40 40 40
Volume / rev (cm3) Eq.1 295 191 119 99 88 72
Compression ratio Eq. 2&3 1.14 1.54 1.37 1.61 1.56 1.20 1.64 1.21 2.38 1.23 1.56

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