Tag: #EngineeringSolutions

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 Repair Worn Gear Tooth Surfaces in Hydraulic Systems

In real hydraulic system operation, gear tooth wear is one of the most common causes of reduced pump efficiency, increased noise, and pressure instability. Proper evaluation and repair are critical to restoring pump performance. 1.Minor Surface Wear (Light Polishing Wear) Condition: Smooth surface / No deep grooves / Wear within allowable tolerance Repair Method: ✔ […]

Common Gear Pump Failures

Most gear pump failures are system-related rather than pump-related. Proper oil cleanliness, correct suction design, and routine inspection are key to long-term reliability. 1.Insufficient Pressure or Flow One of the most common gear pump problems in daily operation: Internal wear of gears and housing Excessive internal leakage Incorrect pump speed or oil viscosity Result: Reduced […]

How to Analyze Hydraulic Pump Failures in Real Hydraulic Systems

Hydraulic pump failure is rarely caused by a single factor. A systematic diagnosis combining pressure, flow, oil condition, noise, and installation checks delivers the most accurate results： 1️⃣ Start with System Symptoms Effective pump failure analysis begins with observing system behavior: Insufficient pressure or flow Slow or unstable actuator movement Abnormal noise or vibration Excessive […]

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 […]