The hook is installed on the wire rope. The rotation of the drum drives the wire rope to wrap around the drum. The length of the wire rope is reduced, the hook is lifted, and the goods rise with the hook, and vice versa.
The main varieties of steel wire ropes commonly used in lifting machinery are as follows:
1. Phosphating coated steel wire rope (patented technology). The steel wire is treated with manganese or zinc-manganese phosphating, and the surface of the steel wire is resistant to The wear resistance and corrosion resistance have been comprehensively improved. The composite effect of the phosphating film and the grease can effectively inhibit the occurrence of fretting wear and completely solve the wear problem during the use of the steel wire rope. The fatigue life is 3 times that of the smooth steel wire rope with the same structure. Through fatigue The test can verify the fatigue life (it is most credible to do the fatigue test in person). It is an upgraded product of the smooth steel wire rope, and can also be used as an alternative to galvanized steel wire ropes that are first plated and then pulled out with a thin zinc layer (the salt spray test can be used to check or compare the resistance). Corrosion capacity), long service life, lower unit cost and better stability.
2. Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing. Generally speaking, hot-dip galvanizing has a thick zinc layer and electro-galvanizing has a thin zinc layer.
3. Stainless steel Steel wire rope, mainly made of 304 or 316 stainless steel, has excellent anti-corrosion effect but is expensive
4. Plastic-coated steel wire rope, based on carbon steel wire rope, the outer layer is coated with polyethylene, polypropylene or nylon
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5. Smooth steel wire ropes have a short service life and a sharp drop in market demand, and will be completely eliminated by phosphate-coated steel wire ropes.
6. Steel wire ropes for marine engineering moorings
7. Cable wire ropes
For lifting machinery used in atmospheric environments, phosphate-coated steel wire ropes are preferred. Hot-dip galvanized-phosphating double-coated steel wire ropes are preferred in corrosive environments, and offshore steel wire ropes are preferred in seawater. When purchasing, please note that the name of the steel wire rope, such as phosphate-coated steel wire rope or 316 stainless steel wire rope, must be indicated on the purchase invoice to protect your legitimate rights and interests. In addition, patented products generally have a patent number spray-marked on the outer packaging of the steel wire rope, and a warranty. The book should have main technical indicators, such as phosphating film type and film weight, for reference only