The current roots pump exist some problems including the uneven clearance

bad rotor meshing result and a low work efficiency.In order to improve the meshing effect of rotors and increase the volumetric efficiency and performance of the roots pump

designing a reasonable rotor which meets the requirements is necessary.In view of the researched roots pump cycloid rotor

first of all

the theoretical profile equation of cycloid rotor is deduced according to the principle of cycloid form and then the actual type line equation is got.The parameter equation of lines is programmed for 2D sketch

which is to import 3D software to generate entity model.Finally

the motion simulation is carried out by using the dynamic simulation of 3D software.There is no interference phenomenon and uniform clearance between the rotors during the process of simulation

which shows that this type of line equation design satisfies the requirement of designing and applying.It is contribute for designing the high performance roots pump.In addition

it has an important practical significance for producing different series of products through change the parameter values.