2013年8月13日星期二

The correct selection of wire rope has an important role on the gantry

  Crane wire rope is the most widely used flexible member, a light weight, good flexibility, wear-resistant, able to withstand shock loads, high-speed operation without noise, broken wires before breaking harbinger of other characteristics. But lifting rope frequently used in various workplaces,sino hoist easy to wear, the high temperature baking, corrosion, etc., if the rope selection, care, maintenance and improper use of wire rope prone to rupture, resulting in fatalities or major danger. Therefore, the appropriate choice of rope is very important.
     After years of practice has proved that the new wire rope and wire rope in the normal state suddenly Duanzhe phenomenon is rare. The main cause of damage to rope in the long-term use, the outer wires due to wear, fatigue or deformed, resulting in gradually broken. With the increase in the number of break, short break the speed gradually accelerated. When the number of broken wires up to a certain limit, will reduce the actual safety factor, if you continue to use, there is the possibility of breaking the whole rope. In addition, the  overhead gantry crane  operator's illegal operations and unreasonable use, such as frequent overloading, pulled oblique hanging crooked, etc., will cause the rope breaks.
     User in the selection should be based on use of the bridge gantry crane  wire rope applications and operating environment and the heavy degree, choose the most suitable rope.
(1) In order to ensure the life of wire rope, the work should be based on institutional level and uses the correct selection of wire rope safety factor and tensile strength.
(2) According to the classification of steel toughness levels used as a  hoist gantry crane   as Secretary Faso, tensioning wire rope for two.
(3) for use in high temperature environments rope to use asbestos core and metal core wire rope is appropriate; work in the open air, moisture, corrosive environments such as galvanized steel wire rope should be used.
(4) wound on the pulley and rope drum rope line contact should be preferred.
(5) In order to make lifting smooth, round and round the phenomenon does not occur, the general interactive twist rope.

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