OPTIMIZED FOUR-WING, NON-INTERMESHING ROTORS FOR SYNCHRONOUS DRIVE AT OPTIMUM PHASE RELATION IN INTERNAL BATCH MIXING MACHINES

摘要

ABSTRACTFour-wing, non-intermeshing rotors are optimized forsynchronous rotation to be driven by synchronous drive means ata constant 180° phase angle, there being two long wings andtwo short wings on each rotor. A first long wing and firstshort wing originate at a first end of each rotor, and a secondlong wing and second short wing originate at the second end ofeach rotor, the helix angle "A" being the same for all wings onboth rotors, and being in the range from about 10° to about50°. The axial length 11 is the same for all long wings,the axial length 12 also being the same for all short wings.Each rotor has a transition zone opening between the terminationof a short wing and the termination of the next succeeding longwing relative to the direction of rotation, the next succeedinglong wing originating at the opposite end of the rotor from theshort wing. Thus, there are two transition zone openings oneach rotor, and all four of the transition zone openings are thesame; that is: Q1=Q2=Q3=Q4 The axial and rotationalforces are the same for all the long wings. Also, the axial androtational forces are the same for all the short wings. Theaxial forces on each rotor advantageously are balanced as wellas the rotational and axial forces of both rotors.