A|At present, the mainstream home elevator structure on the market is traction elevator, strong drive elevator, screw elevator, elevator hydraulic elevator, each of them has its own advantages, but also has its own disadvantages.
Traction elevator, its main component structure is to drive the motor through the wire rope to pull the car and the weight, so as to realize the elevator rise or fall. Its advantage is that the running speed can be done very fast, and the running effect can also be very smooth. However, its main disadvantages are: First, the traction elevator occupies a relatively large space. Second, the installation of the traction elevator has high requirements for civil construction, and it is necessary to dig a bottom pit and sufficient top floor height. Third, the safety of the traction elevator needs high-frequency maintenance to guarantee, when there is no maintenance or overhaul in accordance with the regulations, it is easy to have the wire rope break or the car slip, resulting in falling ladders or cutting and pinching.
Strong drive elevator is a kind of traction elevator, its advantage is that there is no heavy iron, so the utilization rate of the hoistway is high, and the same size of the hoistway is larger than the traction elevator car area. The disadvantage is that the driving method is forced drive, and the principle of the hoist, there is no borrowing part when driving, and the power requirements for the host are relatively large, about 4 times the energy consumption of the traction elevator, high energy consumption and high noise. In addition, the wire rope and brake of the strong drive elevator are always in a state of working fatigue, and long-term in this situation will form a safety hazard, and the wire rope and brake must be checked and replaced regularly.
Screw elevator, it is driven by the drive motor to drive the nut on the screw forward or reverse, so as to realize the rise or fall of the platform. Its advantage is to ensure that the elevator will not fall from the structure, and the space utilization rate of the screw elevator is relatively high. Its disadvantage is that it cannot run at too high a speed (at present, according to regulations, the screw elevator speed can be 0.3m/s), and during operation, because the motor is moving with the platform, there is a certain noise that can be felt on the platform.
Hydraulic elevator, its main structure is a hydraulic cylinder, by controlling the direction and flow of hydraulic oil to provide power, so that the car rises or falls. Its advantage is that it can provide very large power for the car, and the rated load of the hydraulic elevator will be relatively large, and it can even achieve a rated load of one or two tons. But its disadvantages are also obvious, in long-term use of the hydraulic pump seal ring is easy to damage and lead to oil leakage, which in the later use once the oil leakage will cause difficult to repair completely or the construction site is very chaotic. Hydraulic elevators are mainly used in industrial scenes and places where the on-site sanitary conditions are not high.