What are the causes of gear noise in gear pumps

The influence of flange surface roughness on gear pumps. The roughness of the flange surface has a significant impact on the sealing effect, especially when non soft gaskets are used. The high roughness value of the sealing surface is one of the main reasons for leakage. For example, when turning a flange surface, the cutting pattern is a spiral line. When using a metal gasket, if the roughness value is large, the gasket cannot block the spiral groove formed by the cutting pattern. Under pressure, the medium will leak out along this groove.