1, AC elevator
Elevator driven by AC induction motor. According to the dragging mode, it can be divided into AC single speed, AC double speed, AC voltage regulation and speed regulation, AC voltage transformation and frequency conversion, etc.
2.DC elevator
The rated speed of elevators driven by DC motors is generally above 2.00 m/s.
3. Hydraulic lift
Generally, it refers to an elevator that uses an electric pump to drive the liquid to flow, and the elevator car is lifted by a plunger.
4. Rack and pinion elevator
An elevator with a guide rail made into a rack has a car equipped with a gear engaged with the rack, and a motor drives the gear to rotate to lift the car.
5. Spiral elevator
The plunger of a straight-top elevator is processed into a rectangular thread, and then a big nut with a thrust bearing is installed on the top of the oil cylinder, and then the motor drives the nut to rotate through a reducer (or belt), so that the screw can lift the car.
6, linear motor
The power source of linear motor driving elevator is linear motor. In addition, in the early days, the elevator was driven directly by steam engines and internal combustion engines, but now it is basically gone.
Extended data:
The invention and origin of elevators
1852, the owner of Otis, the boss of new york yonkers bedstead manufacturing company, asked him to build a freight elevator to transport the company's products. As a skilled foreman, Otis doesn't think this is a difficult task. Otis designed a brake.
Bogie springs and brake rods are installed at the top of the platform of the elevator, which are connected with the guide rails on both sides of the elevator shaft, and the lifting rope is connected with the bogie springs, so that only the weight of the lifting platform is enough to pull the springs and avoid contact with the brake rods.
If the rope is broken, the truck spring will weaken the tension, and both ends should engage with the brake lever, so that the platform can be firmly fixed in place to avoid further falling, and the safety elevator will come out.
Baidu encyclopedia-elevator
Baidu Encyclopedia-Elisha Graves Otis