The structure of the steel wire rope has an important influence on the fatigue resistance of the steel wire rope. Generally, the surface contact wire rope is in contact with the steel wire rope, and the wire contact wire rope is in contact with the steel wire rope. For elevator steel wire ropes, limited by the working conditions, the relatively small space environment of the elevator shaft can not use the larger diameter traction sheave.
The surface contact wire rope has high rigidity and poor flexibility, because it is rarely used for forging, die pulling or Elevator wire rope produced by rolling. Ordinary elevator ropes use 6 or 8 strands of wire contact wire ropes, and high speed elevators use parallel wire ropes. According to the modern steel wire rope design concept, maintaining proper gap between the strands of the steel wire and between the steel wires in the strand is beneficial to the improvement of the fatigue resistance of the steel wire rope, but the uniformity of the yarn rope must be ensured, so the inner wire rope of the wire contact wire rope The determination of the wire diameter ratio, wire diameter tolerance, and diameter of the hemp core is quite important.
The quality of the grease used in the wire rope has an important influence on the fatigue resistance of the wire rope. It must be selected according to the use and environment of the wire rope and the technical specifications of the grease. The elevator wire rope is mainly used in the indoor elevator shaft. Under the condition that the elevator shaft does not adopt the temperature and humidity control measures, the internal environment of the elevator shaft is closely related to the overall environment of the area, such as the low temperature drying in the northeast region and the high temperature and humidity in the southern coastal area.
The regional temperature and humidity vary greatly. When using grease, the end user's place of use must be considered. The physical properties of the grease are significantly affected by temperature. The wire rope maintains its lubricity for as long as possible. The grease has certain high and low temperature properties. Generally, the high temperature performance is the dropping point of the grease. The low temperature performance is the low temperature brittleness of the grease. The selected grease should ensure high temperature without dripping. Oh, the temperature is not brittle.