Chain Block as an upgrade version of the fixed pulley, fixed pulley fully inherited the advantages of using reverse backstop while reducer and chain brake pulley combination of symmetrically arranged two spur gears rotating structure, a simple, durable and efficient.
mechanical lifting devices
2014年7月18日星期五
Winch Snatch Block winding principle
For the single winding non rotating Winch Snatch Block wire rope, must strictly abide by the principles above, otherwise easily lead to permanent deformation of wire rope; for multi-layer winding, rope rotation direction is decided by the drum rope groove direction, chain hoist 1 ton so as to lay the foundation for the next layer.
Steel wire rope winding drum mutual friction and the extrusion pressure is big, easy to produce the phenomenon of chaos rope, so we should select the wire rope diameter slightly smaller than the rope groove pitch and groove diameter, lashing cargo so as to increase the contact area between the wire rope and drum, reducing the friction force between the adjacent wire rope, so as to improve the steel wire rope life. Practice has proved, wire rope electric hoist wire rope diameter than the rope groove pitch 1%, contribute to the rope tightly, effectively eliminate the climbing rope, rope disorder phenomenon.
In the same diameter, number of wire rope strand diameter smaller, single wire becomes smaller, the flexible of the steel wire rope is good, can reverse bending force to overcome the wire rope good out of drum is also easy, wearing rope. While the coarser outer strand, Wire rope winchthe steel wire is thicker, can better abrasion resistance, mechanical damage, corrosion and extrusion pressure. Therefore, only when the two advantages combine well, is the quality of wire rope is really high performance.
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