Pump Body Structure Analysis And Optimization Design Of Internal Gear Pump

Compared with the internal gear pump with external gear pump,the internal gear pumpis small size, low noise and high efficiency, etc.In this paper, it is based on the pump body of the involute internal gear pump andresearch in the related structure optimization in order to improve.Made a few main aspects of the work in the paper:1. The outlet of the tank of the internal gear pump as an important structure of the gearpump body, affecting the gear pump performance of the pump body. Outlet of the tankstructure is complex, including the joint of arc bottom and out of the tank wall should connectwith rounded corners and the scope of the size of the radius2. Both sides of the wall area of the outlet of the tank is relatively affect the performanceof the pump body. Size on the variation of affect the stress,the strain and the displacement ofthe pump body. Judging the influence of the pump body by changing.3. Whether oil outlet should be processed into taper, through the gradient flow state toreduce the impact of the fluid in the pump body4. The diameter of the bolt holes affect the performance of the pump body, by studyingthe bolt diameter force to determine whether the bolt hole diameter meet the requirement.5. There is ring clearance between the inside cavity of the pump body and the outsidesurface. pv value of oil film when turning determine whether the relative rotation in thelubrication state, when the minimum oil film thickness is0, the relative rotation is dryfriction, under the state of dry friction,wear occlusion happens affecting the service life ofpump.6The yield strengh is different between the aluminum alloy and the ductile iron. so theycould withstand different pressure. They could withstand different maximum pressurebetween aluminum alloy pump body and ductile iron pump body.Finally, summarized the research of gear pump on pump body, the not yet research workwas discussed.