Tag: #PumpTechnology

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 […]

Working Principle of a Double-Acting Vane Pump

Working Principle of a Double-Acting Vane Pump What Is a Double-Acting Vane Pump? A double-acting vane pump is a positive displacement pump in which: • The rotor rotates inside an elliptical cam ring • Multiple sliding vanes divide the space into sealed chambers • Two suction zones and two discharge zones are formed during each […]

Why Is the Single-Acting Vane Pump Called a Non-Unloading Pump

Core Reason: Permanent Eccentricity In a standard single-acting vane pump: The cam ring and rotor maintain fixed eccentricity Pump displacement remains constant Flow is continuously delivered during rotation There is no built-in pressure unloading path Therefore, the pump does not automatically unload under pressure, so it is called a non-unloading vane pump.   Hydraulic Behavior […]