Overview
The traction wire rope is also called the traction rope. The elevator special wire rope connects the car and the counterweight, and is driven by the traction machine to lift the car. It carries the sum of the weight of the car, counterweight, rated load and so on. The traction machine is wound around the traction sheave and the guide wheel in the machine room, one end is connected to the car, and the other end is connected to the counterweight.
Traction wire rope structure and material requirements
The traction wire rope is generally a circular strand structure and is mainly composed of a steel wire, a strand and a rope core. The steel wire strand is made up of several steel wires. The steel wire is the basic strength unit of the steel wire rope; the wire strands are made of steel wire ropes of the same diameter per strand, and the number of strands is large, and the fatigue strength is high. Elevators are generally 6 shares and 8 shares. The cord core is a wrapped flexible mandrel of strands, usually made of synthetic fiber of fiber sisal or polyolefin (polypropylene or polyethylene), which can support and fix the rope and can store lubrication. Agent. The material of the steel wire in the steel wire rope is made of high-quality steel with a carbon content of 0.4% to 1%. In order to prevent brittleness, the content of impurities such as sulfur and phosphorus in the material should not exceed 0.035%.
Wire rope replacement criteria
Generally, it can be considered from the following four aspects: a large number of broken steel wire ropes. Wear and development of the wire rope are simultaneously generated and developed. Corrosion on the surface and inside, especially internal corrosion, can be checked with a magnetic flaw detector. The wire rope has been used for a long time. Of course, it cannot be generalized with the frequency of use. The general safety period must be at least one year. If it has been used for 3 to 5 years, it is worth considering. To correctly determine the time, it is necessary to analyze and judge from the records of regular inspection. Broken wires are evenly distributed between the strands. The maximum number of broken wires in one lay length exceeds 32 (about 20% of the total number of wires). Broken filaments are concentrated in one or two strands. The maximum number of broken wires in a lay length exceeds 16 (about 10% of the total number of wires). After the traction rope is worn, its diameter is less than or equal to 90% of the nominal diameter of the original wire rope. The wire on the surface of the traction rope is heavily worn or corroded.
Washer,Plain Washer,Flat Washer,Spring Washers
Jiangsu Jiajie Special Screw Co., Ltd , https://www.jiajiescrewcompany.com