What is hydraulic oil phenomenon, what harm to hydraulic element
When the hydraulic pump is working properly, there is a moment when a dead volume is present; Died from a closed volume size change and lead to shock pressure, cavitation and noise hazard of the hydraulic pump performance and life of the phenomenon is known as the trapped oil, pump and hydraulic components abrasion, corrosion, sealing accelerated aging or dissolved
The pressure has risen sharply, much more than the pressure of the gear pump. Shafts and bearings are heavily impacted; It produces a lot of radial force; Increasing power loss, heating oil, causing noise and vibration; Reduce the stability and longevity of the gear pump; Pressure fluctuation; Cavitation, etc.
For the gear pump to work smoothly, the overlap coefficient of gear mesh must be greater than one, that is, there is always two pairs of gears engaged at the same time. This is where some of the oil is trapped in a closed cavity formed by two pairs of gears, as shown on the right. This closed volume decreases with the gear and gradually increases. Closed volume decrease can make the trapped oil produced by squeezing pressure, and outflow from cracks, cause the oil heating, bearing and other parts have also been added unbalanced load. The increase of closed volume causes a partial vacuum, which causes the oil to produce air holes, causing noise, vibration and cavitation. This is the oil of the gear pump.
