| The rotor oil pump with higher flow， lower power consumption， higherefficiency，lower noise and wear is becoming the tendency，along with automobileenterprises are more and more strict with the oil pump. This paper is based on theproject of Noise Control Mechanism of Rotary Oil Pump Based on Sound-VibrationCoupling (12JJ9015)funded by Hunan Natural Science Funds. A type of CUMMINS6B elliptical cycloid rotor oil pump is studied in this paper. The main findings of thispaper are as follows:(1)The profile of inner and outer rotor is deduced according to the principle ofgear meshing, and the sliding rate of tooth profile and meshing characteristic areanalyzed. Then the transmission of power and wear of rotor in different section oftooth profile can be obtained.(2)Kinematics simulation and contact dynamics simulation of the pump areaccomplished with dynamics simulation software ADAMS and finite element softwareABAQUS. Then the transmission ratio of rotor and meshing contact stress areobtained. The simulation results show the rotation speed and strength of rotor canmeet requirements well.(3)Compute the theoretical flow of oil pump, design the inlet and outlet oilchamber according to the meshing. At last, three schemes of tooth profile correctionwere proposed based on processing requirement and the linetype of rotor. Flow fieldsimulation was finished with PUMPLINX software.(4)Test the speed characteristic and pressure performance of original pumps andthree newly designed pumps. Then it shows that the experiments are consistent withthe simulation results, the newly designed pumps perform better than the originalpump. So the improvement has achieved the aim. |
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