Briefly describe the types of passenger elevators

Elevators designed to transport passengers are called passenger elevators. There are many types and classification methods. On the one hand, according to the driving mode, it can be divided into traction drive elevators, hydraulic elevators, linear motor drive elevators, rack and pinion drive elevators, Drum-driven elevators, screw-type elevators, inclined elevators, etc. Below we will make a few analysis according to the classification of driving mode: 　　 AC elevator, using AC induction motor as the driving force of passenger elevator. According to the drag mode, it can be divided into AC single speed, AC double speed, AC voltage and speed regulation, AC variable voltage and frequency conversion speed regulation, etc.　　

DC elevator, an elevator that uses a DC motor as the driving force. The rated speed of this type of elevator is generally above 2.00m/s.　　Hydraulic elevators generally use an electric pump to drive liquid to flow, and a plunger to lift the car up and down.　　

In a rack and pinion elevator, the guide rail is processed into a rack, the car is equipped with a gear that meshes with the rack, and the motor drives the gear to rotate to make the car lift.　　

For screw elevators, the plunger of the straight-top elevator is processed into rectangular threads, and then a large nut with thrust bearing is installed on the top of the cylinder, and then the nut is driven by the motor through the reducer (or belt) to rotate, so that the screw is lifted An elevator in which the car rises or falls.　　

The power source of elevators driven by linear motors is linear motors.