Working principle of oil pump
2025-08-20
The oil pump transports oil from the low-pressure area to the high-pressure area through mechanical or electric means, and its core principle is based on volume change or power transmission:
Positive displacement oil pump: relying on working components (such as plungers and gears) to perform reciprocating or rotary motion in the pump cylinder, alternately increasing and decreasing the working volume, to achieve liquid suction and discharge. For example, a plunger pump completes the process of oil suction and pressure by the reciprocating motion of the plunger inside the plunger sleeve.
Power oil pump: uses a high-speed rotating impeller to do work on the oil, allowing the oil to obtain energy and be transported to the high-pressure zone.
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