What are the composition and classification of passenger elevators?

Passenger elevator: an elevator designed to transport passengers. It is required to have perfect facilities and certain car interior decoration.

Passenger elevator is a vertical elevator powered by motor. It is equipped with box shaped pod and is used for passengers in multi-storey buildings. Fixed lifting equipment serving the specified floor. It has a lift car running between at least two vertical rigid guide rails. The size and structural form of elevator car are convenient for passengers to access or load and unload goods. It is customary to regard the elevator as the general name of vertical transportation in the building regardless of its driving mode.

Composition of passenger elevator

Traction System 

The main function of the traction system is to output and transmit power for the passenger elevator to make the elevator run. The traction system is mainly composed of traction machine, traction steel wire rope, guide wheel and reverse rope wheel.

Guidance system

The main function of the guidance system is to limit the freedom of movement of the lift car and counterweight of the passenger elevator, so that the lift car and counterweight can only move up and down along the guide rail. The guide system is mainly composed of guide rail, guide shoe and guide rail frame.

Lift car

Lift car is an elevator component for transporting passengers and goods. It is the working part of the elevator. The car is composed of car frame and car body.

Door system

The main function of the door system is to seal the landing entrance and car entrance. The door system consists of car door, landing door, door opener and door lock device.

Weight balance system: the main function of the system is to relatively balance the weight of the car. During the operation of the elevator, the weight difference between the car and the counterweight can be kept within the limit to ensure the normal traction transmission of the elevator. It is mainly composed of weight and compensation system.

Electric drive system

The function of electric drive system is to provide power and implement elevator speed control. The electric drive system consists of traction motor, power supply system, speed feedback device, motor speed regulation device, etc.

electric control system 

The main function of the electrical control system is to operate and control the operation of the elevator. The electrical control system is mainly composed of control device, position display device, control panel (cabinet), leveling device, layer selector, etc.

protection system 

Ensure the normal use of the elevator and prevent all accidents endangering personal safety. It is composed of speed governor, safety gear, buffer and end station protection device.

Frequency converter system

The passenger elevator adopts vector controlled digital closed-loop VVVF frequency converter, which can accurately control the rotating torque of the main engine in real time according to the actual load of the car and the speed of up and down, through the adjustment of the current and phase, so as to ensure the smooth operation of the elevator.

Passenger elevator classification

By driving mode

AC elevator, DC elevator, rack and pinion elevator, screw elevator;

Classification by speed

There is no strict speed classification for passenger elevators. In China, it is customary to classify them according to the following methods.

Low speed elevator: it usually refers to the elevator with a speed lower than 1.00m/s.

Medium speed elevator: it usually refers to an elevator with a speed of 1.00 ~ 2.00m/s.

High speed elevator: it usually refers to an elevator with a speed greater than 7m / s.