Study On A Through Single Vane Vacuum Pump Used In Vehicle

With advantage of compact frame, excellent dynamical equilibrator and convenient mend, the rotary vane vacuum pump plays an important role in the vacuum equipment market. The traditional rotary vane vacuum pump is widely used in metallurgy, machinery, electronics, chemicals, petroleum, pharmaceutical and other industries. In recent years, with the development and popularization of gasoline direct injection engine, hybrid and pure electric vehicle, electronic pump gradually replaced the engine intake manifold, and become the main vacuum source of a car vacuum booster brake system. Through single vane vacuum pump is one kind of sliding vane vacuum pumps which has the advantages of simple structure, small energy consumption, durability, no additional devices, it will play an important role in the future of the auto parts marketThis paper studies functional construction, working principle, and the main factors which affecting working performance of the vacuum pump, and the reasons that influence the pumping speed, ultimate vacuum, noise, oil spills. Based on the performance requirements of the existing passenger car, brake system vacuum pump mounted on the engine camshaft. The paper also design a through single rotary vane vacuum pump prototype in order to meet the market’s demand.The study of this paper contains that as followings. First, for the problem of low exhausting speed, this paper proposes a new method of the pump body profile construction and a new structure of rotary vane pump, decides mathematical model of the pump body, and establishes a new mathematical equation of the cross-sectional area of the new working chamber volume. Then, deduces the a specific formula and variation of the cross-sectional area of the rotational vane vacuum pump, decides the relationship between exhausting speed and the rotor diameter, And creates a pump sample. In addition, programmed a analysis program of the pump in order to make the adjustment and optimization of the parameters more convenient. The performance of the vacuum pump is tested, and the test results are compared with the theoretical analysis to identify the problems that existing in application of practical engineering.The results show that, with the design method for the pump mentioned in this paper, the pumping speed and ultimate performance of the rotary vane vacuum pump prototype can be met. However, noise and other issues still exist, which need to be optimal designed later. Through the research, a feasible design methods and test data are provided for further research and development on through single vane vacuum pump.