1 on the center part of the internal meshing gears, tooth profile parameters to optimize the design, not only for making measurements, and the work of the transmission is more stable and reduce the pump oil pulsation.

2 adjusting and improving the gear pair and gear pair and the pump body to fit between the precision and the gap, improve wear resistance and reliability. .

3improve the fitting precision and surface roughness, the flexibility, reliability, durability is increased.

4the research and grinding process to improve the accuracy of form and position, so that the parts not only with accurate, and run without jamming and impact of the phenomenon, when the rotation is stable and no vibration and low noise.

5of all parts selection of domestic materials and independent supporting manufacturing and processing.