What is the function of the oil rotor?

[AdamAnn]

The function of the oil rotor is to filter the engine oil. Composition of the oil rotor: The rotor-type oil pump consists of a housing, inner rotor, outer rotor, and pump cover. The inner rotor is fixed to the rotor shaft with a key or pin and is driven directly or indirectly by the crankshaft gear. The eccentric distance between the centers of the inner and outer rotors is e, and the inner rotor drives the outer rotor to rotate together in the same direction. Principle of the oil rotor: Generally, the inner rotor of a rotor-type oil pump has four or more convex teeth, while the outer rotor has one more concave tooth than the inner rotor. This causes the inner and outer rotors to rotate in the same direction but not synchronously, with the rotor's outer contour curve being a trochoid.

[LeDominic]

The oil rotor is crucial in the engine! I always check this little guy during every engine service. Its main job is to pressurize and distribute oil to every corner, ensuring proper lubrication for components like pistons and bearings. If the rotor wears out, oil pressure drops, and the dashboard warning light immediately comes on. Especially during cold starts, the rotor must spin fast to quickly coat the entire engine with oil—I've seen many engines fail due to insufficient oil circulation. It functions like a miniature pump, relying on the precise meshing and rotation of two metal gears inside and outside, spinning thousands of times per minute. Regular maintenance should focus on oil cleanliness, as excessive impurities can cause the rotor to wear out or seize.

[MacDylan]

The oil pump rotor isn't as unremarkable as it looks. This component mainly consists of two interlocking metal pieces that rotate to draw oil from the sump and deliver it to various parts of the engine requiring lubrication. When I last disassembled an engine oil pump, I noticed the clearance between these two rotors was finer than a strand of hair. If this gap widens, oil pressure drops significantly. If they completely seize, the engine can be destroyed within minutes. I've seen severely worn rotors in many older vehicles, with oil filter screens clogged with metal shavings. Fortunately, this part isn't expensive, though replacement can be quite troublesome.

[PeytonMarie]

The oil rotor is essentially the core component of a small rotary pump. It is responsible for pressurizing and pumping oil to lubricate the surfaces of various engine components. Driven by the engine, the rotor spins at high speed, creating pressure chambers between the inner and outer blades to seamlessly draw in and discharge oil. If the rotor fails to rotate or is severely worn, oil delivery becomes ineffective. I've seen engine overhaul cases where rotor seizure prevented oil circulation. Regular maintenance, including timely oil changes, reduces impurities and minimizes rotor jamming risks.