What is the Oil Trapping Phenomenon?

[AdelineAnn]

During normal operation of a hydraulic pump, the varying sealed volume should be connected to the corresponding oil suction and discharge chambers of the oil distribution device. The "occluded volume" formed due to the pump's structure (not connected to the suction or discharge chambers) is called the oil trapping phenomenon. The related introduction is as follows: Consequences of Oil Trapping: "Oil trapping" causes the liquid to be compressed, leading to increased pressure or the creation of a partial vacuum resulting in cavitation. The consequences include increased power loss, elevated oil temperature, noise and vibration, affecting the smooth operation and lifespan of the pump. Working Process of a Hydraulic Pump: The oil trapping phenomenon and the working process of a positive displacement hydraulic pump are generally divided into three stages: first, the volume of the suction chamber increases to create a vacuum and draw in the liquid (suction stage), then it goes through an intermediate stage (transition stage where neither suction nor discharge occurs), and finally, the volume of the discharge chamber decreases to expel the liquid into the system (discharge stage).