Detailed Explanation of Elevator Door System

The Perfect Combination of Safety and Function

Hello everyone, today we will talk in detail about one of the eight systems of the elevator - the door system. 

The elevator door machine is a mechanism responsible for opening and closing the elevator hall car door. When it receives the elevator opening and closing signal, the elevator door machine controls the door opening motor through its own control system, converts the torque generated by the motor into a force in a specific direction, and closes or opens the door. When the closing force is greater than 150N, the door machine automatically stops closing the door and opens the door in the opposite direction, which plays a certain degree of door closing protection.

The technology of the door machine has gone through the development of mechanical door machines, variable frequency door machines and permanent magnet synchronous door machines.

● Function: Seal the entrance of the floor station and the entrance of the car
The main function of the door system is to prevent unauthorized personnel from entering the elevator shaft or car, thereby ensuring the safety of the elevator operation.

● Composition: car door, floor door, door opener, door lock device
The door system consists of the following parts:
Car door: The door at the entrance of the car, which consists of car door panel, door guide rail, car sill, etc.

Floor door: Also known as hall door, the door set at the entrance of each floor station, consists of door, door guide rail, floor door sill, floor door linkage mechanism and self-returning door mechanism, etc.

Door opener: A device that opens or closes the car door and floor door.

Door lock device: An electromechanical interlocking safety device set on the inside of the floor door, which locks the floor door after the door is closed, and connects the safety circuit at the same time, so that the elevator can run.

● Car door
The car door is set at the entrance of the car, which consists of car door panel, door guide rail, car sill, etc. These components work together to ensure that passengers can enter and exit the car safely and smoothly.

● Floor door
The floor door, also known as the hall door, is set at the entrance of each floor station. It consists of doors, door guides, floor door sills, floor door linkage mechanisms and self-recovery door mechanisms. These components work together to ensure that passengers can safely enter and exit the elevator shaft.

● Door opener
The door opener is a device that opens or closes the car door and floor door. It controls the opening and closing of the door through the motor and transmission mechanism to ensure that the door opening and closing process is smooth and reliable.

● Door lock device
The door lock device is set on the inside of the floor door. When the door is closed, it locks the floor door and connects the safety circuit to enable the elevator to run. This is an electromechanical interlocking safety device that ensures that the elevator will not start running if the door is not closed or locked.

Through the collaborative work of these components, the elevator door system can not only meet the basic functional requirements, but also ensure the safety of passengers to the greatest extent. I hope this article can help everyone better understand the structure and working principle of the elevator door system.