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Do the elevator wire ropes need to be oiled for maintenance on a regular basis?
2026-04-28
The elevator steel wire ropes must be regularly oiled for maintenance, but they must not be oiled randomly, over-oiled, or use the wrong type of oil. The maintenance logic for elevator steel wire ropes is completely different from that of crane steel wire ropes. It follows the special maintenance standards of "light lubrication, micro maintenance, avoiding greasiness, and avoiding dust accumulation", and is one of the core projects in elevator maintenance. It directly determines the service life of the steel wire ropes, passenger safety, the wear of the traction wheels, and whether the annual inspection of the elevator can be qualified.
First, one must understand the structural characteristics of elevator steel wire ropes. Elevator-specific ones are mostly 8×19S or 6×19S type wire contact flexible steel wire ropes, often paired with fiber cores. The internal core of the rope comes with dedicated anti-corrosion lubricating grease when manufactured. During daily operation, it relies on the internal stored oil for slow and gradual lubrication. The outer layer only needs to be slightly oily, and does not require a thick oil film coating. If the steel wire ropes are completely not oiled and left to dry for a long time, a series of hazards will occur: the dry friction between the steel wires intensifies, the internal steel wires wear out rapidly, and fatigue harden, easily causing early wire breakage and strand separation; the surface of the steel wire rope rusts and oxidizes, especially in basements, damp corridors, and coastal high-humidity salt spray environments, the rust will gradually erode the cross-section of the steel wire, reducing the breaking tension; the steel wire rope becomes hard, loses flexibility, and when passing over the traction wheel and guide wheel, the bending stress concentrates, accelerating aging; at the same time, the rope strands become dry and tight, causing abnormal noise and vibration during operation, and will further aggravate the abnormal wear of the rope groove on the traction wheel, increasing the noise and component wear of the elevator. However, conversely, excessive oiling, applying ordinary engine oil, waste engine oil, or grease, is even more harmful than not oiling. Applying too much oil will cause the surface of the steel wire rope to adhere to a large amount of dust, sand particles, and metal powder, which mix together to form a grinding agent, wrapping in the gaps of the rope strands. During operation, it constantly grinds the surface of the steel wire, causing severe abrasive wear, the more oil, the more wear. Excess oil will drip down along the steel wire rope, polluting the top of the car, the components in the shaft, and the floor of the machine room, presenting fire safety hazards and hygiene issues; a large amount of accumulated oil will fill the rope groove of the traction wheel, reducing the friction between the steel wire rope and the rope groove, and the elevator relies on traction friction to drive, insufficient friction is likely to cause traction slipping, elevator runaway, over-riding, and top-dropping or bottom-jumping major safety risks; inferior ordinary lubricating oil has a viscosity mismatch, it solidifies at low temperatures and becomes thinner at high temperatures, and it will corrode the internal fiber core of the steel wire rope, causing the core to age and powderize, and the overall structure to become loose and deformed. |
