There are two main ways for elevators to move up and down. For low rise applications (buildings between two and four floors), hydraulic jacks are the king's way. The jack can be on the ground or on the ground, and can be retracted nearly 100 feet according to the actual situation and needs. If you just want to go to a few floors or so, jacks are usually the wisest choice. When you want to reach more than five floors, you must consider other different options. Once your elevator rises more than 100 feet, there is only one way to use the rope system. Or there is an exception to this rule, which is the mixed use of rope and hydraulic (rope hydraulic).
Having said so much, let's briefly understand the elevator wire rope. First of all, please remember that when rope is mentioned in the elevator manufacturing industry, we don't mean the rope you climbed in PE class, nor the rope you use in your daily life. The elevator wire rope is highly engineered and made of steel and other composite materials. In addition, they are not single wires, but several wires of different sizes are wound together. A typical cable or rope can have more than 150 precisely designed wires, which are firm, flexible and have a long service life. Multi strand wire is used to increase the life and flexibility of elevator wire rope. When you run the cable on the pulley, the wire on the pulley travels shorter than the wire outside. Over time, this tension will cause rope loss on one side. Therefore, if properly maintained, the elevator rope will be flexible and firm in operation and have a long service life.
According to their different functions, the ropes in the elevator are also divided into different types, such as elevator traction rope, governor rope, balance rope, etc.