Design And Experiment Research On The Rotating-guide-bar And Gear Mechanisms Of Differential Velocity Vane Pump

The differential velocity vane pump is a new type rotary positive displacement pump. It iscomposed of driving system, pump body and two coaxial impellers installed in the pump body.The two impellers have respectively uniformly distributed and equal number of blade. Thedriving system drives respectively the two impellers to rotate by periodically varying speed tomake the cavities between adjacent blades of the two impellers open and close periodically andto make the pump drain and aspirating liquid. Compared with the reciprocating and rotarypositive displacement pump in common use, its advantages are large displacement-volume ratioand working load in equilibrium. The differential velocity vane pump has a very gooddevelopmental prospect.The working principle of differential velocity vane pump and the movement regular ofimpellers are proposed based on the research situation and development trend at home andabroad of the positive displacement pumps and its driving system. The angle velocity fuction ofdifferential velocity vane pump is proved the same period. The function system frame of thedriving system is designed. And the rotating–guide-bar and gear mechanisms are proposed whichcan satisfy the movement regular of the impellers.The rotating-guide-bar and gear mechanisms assembled driving system of differentialvelocity vane pump with the cranks and the guide-bars as active parts are presented based onanalyzing the kinematical characteristic of whit-worth mechanism and built the transmissionmovement regular of the rotating-guide-bar and gear mechanisms. With variation of the motioncharacteristic coefficient on the rotating-guide-bar and gear mechanisms assembled drivingmechanism, their motion characteristics and laws are investigated. The basic parameter equationis established. The kinematics characteristics, theory blade angle and mechanics performance areanalyzed for these two types of driving mechanism. The results show that transmissionperformance of rotating-guide-bar and gear mechanisms assembled driving mechanisms with theguide-bars as active part is superior to that with crank as active part.The overall structure of differential velocity vane pump including the pump body androtating-guide-bar and gear mechanisms assembled driving system is designed based on thestructure of differential velocity vane pump. The Structure design of pump body including the distribution ports and the liquid flowing channel to draining outlet of pump shell, the interferingproblem of the vanes and the balance ring of impellers and the circuit of one-way valve aerialdrainage and sealing of the other parts are raised. The driving system including characteristiccoefficient of whit-worth mechanism, the installation phase angle of rotating-guide-bar with gearmechanism and the ratio of gear mechanism is designed. At last, the overall structure ofdifferential velocity vane pump and the two-dimensional drawing are completed.The dynamics simulation of rotating–guide-bar and gear driving of differential velocityvane pump is built by using Pro/E-ADAMS co-simulation software. The3D modle ofdifferential velocity vane pump is established by Pro/E software. The angle velocity of impellerand the collision relationship of vane are obtained by ADAMS used by data import. The structuredesign of rotating–guide-bar and gear mechanisms of differential velocity vane pump isreasonable, which provides the basis of principle prototype.The principle prototype of rotating–guide-bar and gear mechanisms of differential velocityvane pump is manufactured based on its overall structure. The experiment scheme is constitutedto measure the working performance of differential velocity vane pump. It is known thatrotating–guide-bar and gear mechanisms of differential velocity vane pump can work effectively,which provides the theory basis for further design of the differential velocity vane pump.