Method 1: Add Pressure Relief Grooves
Relief grooves are machined on side plates or valve plates to connect trapped chambers to low-pressure zones.
This allows oil to escape gradually and prevents sudden pressure build-up.
Method 2: Optimize Port Timing & Geometry
Proper inlet and outlet port timing ensures trapped oil chambers are released at the correct moment.
Optimized port geometry reduces abrupt volume changes during meshing.
Method 3: Improve Pump Structural Design
Advanced pump designs reduce oil trapping by:
Modifying gear tooth profiles
Using floating side plates
Adopting pressure-balanced structures
These designs minimize trapped volume and stabilize internal pressure.
Method 4: Control Operating Conditions
Maintaining proper system conditions helps reduce oil trapping effects:
Avoid excessive operating pressure
Maintain correct oil viscosity
Prevent high-speed operation beyond design limits
Method 5: Choose the Right Pump Type
For applications requiring ultra-smooth flow and low noise, vane pumps or piston pumps offer better control of oil trapping compared to traditional gear pumps.