Performance Prediction And Experimental Study Of Electromagnetic Vibration Pump

Electromagnetic vibration pump is one type of first proposed new household positive displacement pump. It is mainly used to transport water and other low viscosity liquid. It has many advantages including small flow, high head, simple structure, good self-priming performance. Electromagnetic driving method was combined with displacement pump in vibration pump for the first time. Its specific speed can reach below 10, and this is a breakthrough in super-low specific speed pump design.The working principle of electromagnetic vibration pump and its performance were studied in the paper. The power generated by electromagnetic actuator and the deformation produced by the elasticity board module were simulated by ANSYS software after rationality simplification of the model. The flow and head of vibration pump were deduced and then the correlation between the pump performance and effect factors were analyzed. Experiments based on sample pump were carried out.The main work and research results are summarized as follows:1. The characteristics and working principle of vibration pump were described. Techniques of reciprocating pump and its development were introduced. Compared with the pump which have small flow and high head, the significant of vibration pump were proposed. The vibration pump design and computation theory were briefly introduced;2. The basic theories of finite element analysis for electromagnetic were described. The electromagnetic force generated by electromagnetic actuator mechanism which was effected by gap thickness and the number of coils were simulated by ANSYS software. Conclusions were obtained such as that "electromagnetic force decreases with the increase of the gaps according to parabola curves";3. Based on the basic principle of elasticity, strength of elasticity board module was calibrated. The performance predication method of vibration pump was raised through static analysis of elasticity board module. The maximum travel of pump spindle affected by gap thickness and the number of coils were analyzed. Conclusions were proposed such as "maximum travel of pump spindle decreases significantly with the increase of the gaps";4. Compared with the maximum travel of pump spindle of simulation and air gap thickness, whether the rotor and stator will collide can be predicted. This will provide references for design and computation of the vibration pump;5. Self-priming and other features were verified through experiments and the reasons of low efficiency of vibration pump were discussed. Take one sample pump for example, which air gap thickness was 3.2mm and the number of coils was 415, the test results showed the technology standards were up to the design requirements;6. Experiments based on sample pump were carried out and the characteristics of the pump were obtained. The comparison of simulation value and experimental data indicates that this method is feasible and accurate and it is significant for engineering application.