Nachi oil pumps have 3 potential internal leakage parts: tooth side leakage of the tooth meshing part, radial leakage of the pump chamber and the circumference part of the top of the tooth, and end face leakage (axial leakage) of the tooth end and the cover end part, of which the end face leakage leakage has the largest amount of leakage.
1, tooth side leakage - about 5% of the total leakage of nachi oil pumps.
2, radial leakage - in the nachi oil pump leakage in the total proportion of 20% to 20%
3, end face leakage-75%~80% of the total leakage of nachi oil pumps
Nachi oil pump at higher pressure, because of its large clearance, so there is a large leakage, if not structural treatment but only applied to lower pressure, the efficiency of compression of its volume is very low.
Therefore, to make nachi oil pumps reach high pressure, improve their working pressure and volumetric efficiency. It is necessary to take structural measures to compensate for the end gap.
