The Development Of Parametric Design System For Oil-free Scroll Vacuum Pump

As a kind of ideally vacuum environment, oil-free vacuum environment is needed urgently by the business organization and scientist. In many developed countries, such as America, Japan, oil-sealing vacuum pumps have been replaced by scroll vacuum pump in more and more fields.there are many kinds of oil-free vacuums in the market such as cryo vacuum pump piston vacuum pump scroll vacuum pump and membrane vacuum pump.Therefore, with high cleanness, simple structure, smaller size and low noise, the scroll vacuum pump is welcome in the field of oil-free vacuum obtainment. Although many manufacturers have been researched on this pump in our state, there is no one having the ability to produce the pump. Developing oil-free scroll vacuum pump which meet the need of state is the duty of internal scientists.My thematic task is to design a whole involute oil-free scroll vacuum pump system with parameterization design and feature-based modeling, working in with Supervisor's key item, including vital parts design, dynamic load calculation and dynamic balancing of transmission.Firstly, dissertating the theoy of design of oil-free scroll vacuum pump, two kinds of structe of oil-free scroll vacuum pump, theory of the molded line of scroll pump, keys to manufacturing and cautions in operation of a scroll vacuum pump are generalized, with the design and fabrication of a scroll pump introduced.This paper analyzes the struct of oil-free scroll vacuum pump, look oil-free scroll vacuum pump as four linkage machine,and getting the two-timea balance method, finding the center of mass, the conditions for the complete dynamic balance of roror interial forces and moment of intertia in the rotary piston vacuum pump are put forword.Based on the major element and the theory of dynamic balance of pump,we design the software to create entitative modeling with UG/Open GRIP, realizing interface visual to design and transfering parameters with UG/Open API combined together to realize the parameterized design of oil-free scroll vacuum pump finally. Operating this software, only with the appropriate parameter,can produce UG modeling of each main part of the oil-free scroll vacuum pump automatically,assembling them can get the rude and unitary modeling of oil-free scroll vacuum pump. The procedure of this software has good common ability adaptability more exploration and man-machine interface(running under the environment of Windows or WinXP)and also a clear convenient input and export, which improves the design efficiency and benefits the product series.