Tag: #OilTrapping

Oil Trapping in Double-Acting Vane Pumps

A hidden issue in vane pump design — oil trapping (hydraulic lock) — can lead to noise, pressure spikes, and component damage. 🔎 What Is Oil Trapping? Oil trapping occurs when: 👉 A sealed chamber of oil is trapped between two vanes 👉 The chamber volume decreases during rotation 👉 But the oil cannot escape […]

How to Eliminate Oil Trapping in Hydraulic Pumps

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 […]

Oil Trapping in Gear Pumps： Causes & Effects in Hydraulic Systems

1.What Is Oil Trapping? Oil trapping occurs when a small volume of hydraulic fluid becomes sealed between meshing gear teeth during rotation. As the gears continue to rotate, this trapped oil has no direct flow path to the inlet or outlet. 2.How Does Oil Trapping Occur in Gear Pumps? Two gear teeth come into full […]