External gear machine e.g. external gear pump has slot-like recessed portions that are extended between bearing bore and bearing bushes, so that power flow direction of bearing forces are acted on low pressure side of bearing bush

摘要

The machine has a drive shaft (8) which is rotationally mounted on a bearing bore (9') having bearing bushes. Bearing bushes are arranged in receiving recess portion (23') of housing and are provided with specific material whose expansion coefficient is larger than housing. The outer lateral surface of slot-like recessed portions are extended between bearing bore and bearing bushes, so that the axial power flow direction of the bearing forces are acted on low pressure-terminal-side of bearing bushes supported in wall of the receiving recessed portion.