This article presents a simple mathematical model for the geometric design of a claw-type rotor. Based on the parameter design, the different claw shapes can be produced, and the design of gas ports and the fluid carryover will be discussed. Hence, a better design course will be proposed for the design of gas ports. Additionally, feasible design regions of the parameters are determined for avoiding the interference between two rotor profiles. Finally, the pumping efficiency will be estimated by the comparisons of carryover area and area efficiency in varied parameters designs. These results can indicate a better design course for the designer.
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