Special pump factory professional sharing: the impact of gear pump and host installation quality

The impact of gear pump and mainframe installation quality

1 The installation requirement of the gear pump and the main machine is less than 0.05.

Usually the working pump is mounted on a variable speed pump, which in turn is mounted on the gearbox. If the end face of the gearbox or variable speed pump is out of tolerance to the center of rotation of the spline shaft, a cumulative error is formed, causing the gear pump to withstand radial forces at high speeds, causing the oil seal to simmer.

2 Is the installation clearance between the components reasonable?

The outer stop of the gear pump and the inner stop of the variable speed pump and the external spline of the gear pump and the spline in the spline shaft of the gearbox, whether the clearance fit is reasonable, both have an influence on the oil of the gear pump. Because the inner and outer stops belong to the positioning part, the matching clearance should not be too large; the inner and outer splines belong to the transmission part, and the matching clearance should not be too small to eliminate interference.

3 gear pump oil is also related to its spline roller.

Because the gear pump shaft extension spline and the gearbox output shaft have a short effective contact length, while the gear pump transmits a large torque during operation, the spline is subjected to large torque and crush wear and even rolling keys generate heat. As a result, the rubber seal of the skeleton oil seal is burned and aged, resulting in oyster sauce. It is recommended that the main engine factory select the gear pump to check the strength of the external spline of the gear pump shaft to ensure sufficient effective contact length.