Analysis of broken wires by elevator handrail manufacturers.
Analysis of broken wires by elevator handrail manufacturers .
(1) Overload broken wire. The fracture of the elevator wire rope caused by overload or impact load shows cup-shaped plastic shrinkage. Due to the large safety factor of the elevator rope, such broken wires are rare;
(2) Fatigue break. The outer layer of steel wire appearing on the largest side of the bending process of the strand, the broken wire caused by metal fatigue, and the fracture shape is flush.
(3) Worn broken wires. With the friction between the traction sheave rope slip caused by such broken wires in the wire and severe abrasion occurs in the extremely outer wires, both sides of the fracture crop was inclined, flat fracture;
the control mode when a passenger is running at rated speed , When there is no passenger, it will run at the speed, and when the passenger arrives, it will automatically return to the rated speed. This control method can save about 30% of energy without load.
(4) Corrosion and broken wires. Corrosion is severe. The fracture is not uniform, and it is pointed.