Research and Application of a New Type Rotor Profile of Roots Vacuum Pump
A design method for the three-blade linear arc rotor profile of Roots vacuum pump was proposed,the profile equation and the main structural parameters of the ZJ-5000 Roots vacuum pump rotor profile were given.The finite element analysis of the new Roots vacuum pump was carried out,and the volume flow rate under different inlet pressure was studied.Based on the new rotor profile,the actual product was produced,and the pumping speed and other performance indexes of Roots pumps with three-blade linear arc profile rotor and double-blade rotor were compared.The results show that the new three-blade linear arc profile has the characteristics of high volumetric efficiency,smooth curve,easy processing,accurate positioning and low working noise.Compared with the two blade rotor,the new one can withstand greater pressure difference load,and the pumping efficiency is improved compared with the traditional three-blade rotor.
Roots vacuum pumprealistic rotor profilethree-blade linear arc profile rotorassembly clearance
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