Gear Pump Troubleshooting: What Determines Working Pressure? (Part 1)

Analysis of Insufficient Pressure in Gear Pumps

- FAULT CAUSE ANALYSIS -

Part 1: Determinants of Working Pressure in Gear Pumps

Fault Cause Analysis

Determinants of Working Pressure in Gear Pumps:

The actual working pressure of a gear pump is determined by the backpressure of the system downstream of the pump.

1. Causes of Backpressure Downstream of the Pump:​ The resistance encountered by the fluid as it flows through the pipeline system downstream of the pump, as well as the load at the end of the pipeline.

2. During the pump selection process, it is necessary to ensure that the pressure provided by the pump is greater than the resistance of the downstream pipeline system plus the load at the pipeline end. It is important to note that the pressure a pump can achieve in actual operation is not determined by the pump itself alone, but is jointly determined by the pipeline resistance and the end load.

Reference Experimental Case: 

In practical applications,

the working pressure of a pump is influenced by pipeline resistance and the end load.

If the pipeline resistance and end load value is only 0.5 MPa, while the pump's capability is 1 MPa, then the pump's actual working pressure can only reach 0.5 MPa.