2013年9月28日星期六

transportation and other high strength pull cord of transportation


Apart from round Electric hydraulic stacker, there are triangular shares, stocks and other flat oval shaped stocks and shares. Compared with round stock, they have a higher intensity, and the drum or pulley rope groove contact performance, long life, but making more complex.
With high-quality carbon steel wire, cold drawing and heat treatment after repeated high strength can be achieved. Wet or outdoor environment in the workplace can be twisted galvanized steel wire rope, in order to enhance rust resistance.
Rope in all industrial countries are standard products, which can use to choose its diameter, number of strands, number of wires per strand, tensile strength and sufficient safety factor, and its specifications are available in the relevant manual Richard. Except the wire rope wear layer, the main deflection pulleys due to repeated Electric hydraulic stacker and roll, and gradually cause metal fatigue fracture, so the rope pulley or reel diameter ratio is an important factor in the decision life rope. The ratio of large, wire bending stress, long life, but a large organization. You must use the occasion to determine the appropriate ratio. Surface layer of wire rope wear, corrosion or broken wires within each twist at the number exceeds the specified value should be scrapped.
Wire rope is mainly used in lifting, transportation and other high strength pull cord of transportation.
Classification
1. Round strand wire rope
2. Braided rope
3. Flat rope
Discard criteria
Excerpt from "lifting wire rope inspection and retirement of practical norms" (GB5972-86) 2.5.1 (latest specification has been revised to GB5972-2006, the following is for reference only, please refer to the latest specification) the nature and quantity of broken wires
The overall design does not allow lifting rope with unlimited long life.
8 shares for the six stocks and wire rope, wire break occurs mainly in appearance. For multi-strand wire rope (typical multi-strand structure) is different, most of which occurred in the broken wire rope inside, so it is "invisible" fracture.
The following table takes into account these factors, therefore, when combined with paragraph 2.5.2 ~ 2.5.11 factors considered together, it is applicable to various structures rope.

没有评论:

发表评论