There are two types of lift on the market today: a hydraulic lift and a traction lift.
Hydraulic lifts have lower requirements for the shaft, such as top floor height, top floor machine room, and energy saving. The traction lift is the most conventional one, which is driven by a steel cable through a winch and has relatively high requirements for the shaft. The safety of both types of lift is very high, and both have national manufacturing standards. Hydraulic elevators are afraid of height and not of weight, while traction elevators are afraid of weight and not of height.
Nowadays, hydraulic lifts account for less than 10%, or even less. Generally lifts are traction lifts (that is, driven by friction between the traction machine and the wire rope.) Traction lifts are also divided into those with and without machine rooms. (Of course, it can also be divided into passenger elevators, freight elevators and miscellaneous elevators, etc.) Now the lift technology has been very mature, relatively foreign than the domestic advanced much. Nowadays, traction machines are slowly developing towards gearlessness and are becoming more and more reliable and smooth in operation. In terms of power, there are generally three types. Hydraulic, traction, and forced (which are slowly being phased out as they are powered by reels and such). Hydraulic lifts are suitable for low floors and large loads. Compared to traction lifts, there is not much room for development.
