Experimental Study and Influencing Factors Analysis of the Electric Gear Urea Pump Supply Performance

Abstract

Abstract An experimental study on four electric gear urea pumps was carried out, and the variation rules of supply flow rate, speed, and volumetric efficiency of the urea pumps were obtained. Test results show that the volumetric efficiency will be affected by the coupling of multiple factors simultaneously, showing complex nonlinearity. A simulation model whose accuracy was verified by test data was established for analyzing the influencing factors of supply performance. With the increase in speed, the variation of volumetric efficiency has a linear relationship with the change of radial clearance and a quadratic parabola relationship with the change of axial clearance. In the range of working speed, the influence of radial clearance on volumetric efficiency is more significant, while the influence of axial clearance on volumetric efficiency will be gradually enhanced with increasing speed. The radial tolerance range should be as small as possible to ensure the consistency of the urea pump’s volumetric efficiency.