Detailed Analysis and Functions of Core Internal Components of Passenger Elevators
2026-08-13 10:13:42
Detailed Analysis and Functions of Core Internal Components of Passenger Elevators
The interior of a passenger elevator consists of key components such as the car, guide rails, and door operators. Each part has a professional designation and specific function. Understanding these technical terms helps to master the operating principles of elevators and the key points of safety maintenance.
I. Functions of
Elevator Mechanical Components
Elevator guide rails are the tracks along which the car and counterweight move up and down, usually made of T-section steel or hollow guide rails. High-quality guide rails can reduce operating vibration and extend the service life of the elevator.
Guidance function: Ensures the car moves smoothly along the predetermined path
Load-bearing effect: Shares the dynamic load of the car and counterweight device
Vibration-damping design: Dissipates the vibration energy generated during operation through the rail joints
As the core force-transmitting component of the traction system, the breaking tension of elevator steel wire ropes must reach more than 12 times the rated load. Modern elevators commonly use 8-10 strands of steel wire ropes, with 19-31 steel wires in each strand.
II. Core Components of the Control System
Modern elevator control systems have been upgraded from relay logic to microcomputer control, mainly including three major modules:
Main control board: Processes call signals and operation logic
Frequency converter: Adjusts the motor speed to achieve smooth start and stop
Landing controller: Manages the door locks and displays on each floor
✅ More reliable practice: Choosing a control system with redundant design can reduce the risk of failure and downtime.
The elevator load weighing device optimizes operating parameters by detecting the load inside the car. When the overload exceeds 10%, the system will prevent the door from closing and issue an alarm.
III. Protection Mechanism of Safety Equipment
The elevator speed governor is a key device to prevent the car from falling out of control. It triggers the safety gear when the speed exceeds 15% of the rated value. Its working principle includes:
Centrifugal mechanism: The swing block opens when the rotation speed is abnormal
Mechanical interlock: Drives the wedge of the safety gear to act
Electrical switch: Cuts off the power supply in advance
⚠️ Pitfall warning: The steel wire rope of the speed governor must be kept vertical, and the bending radius must not be less than 20 times the rope diameter.
The elevator buffer is installed at the bottom of the hoistway, divided into two types: spring type and hydraulic type. When the car or counterweight accidentally falls, the buffer absorbs the impact energy through controllable deformation.
IV. Key Points of Installation and Maintenance
The selection of elevator lubricating oil needs to consider the operating temperature and load conditions:
Traction machine: Use ISO VG220-320 gear oil
Guide rails: Use lithium-based grease with strong adhesion
Door operator: Synthetic lubricating oil suitable for low-temperature environments
A professional elevator maintenance tool kit usually includes: a laser alignment instrument, a steel wire rope flaw detector, a vibration analyzer, etc. These devices can accurately diagnose hidden faults.
✅ More reliable practice: Use an infrared thermal imager to detect electrical connection points every month to identify hidden dangers of poor contact in advance.
V. Safety and Emergency Equipment
The elevator anti-pinch device is realized through infrared beams or mechanical touch edges, and will reopen the door when an obstacle is detected. The latest standards require the anti-pinch device to be triggered when the door gap is greater than 50mm.
⚠️ Pitfall warning: The light curtain sensor needs to be cleaned regularly to avoid false detections caused by dust.
The elevator emergency call device must ensure continuous operation for more than 2 hours after a power failure. Modern systems mostly use IP network transmission, which has anti-interference advantages compared with traditional intercom systems.
Understanding the professional terms of the internal components of the elevator is only the first step. More importantly, it is to master the coordination principle and maintenance points of each system. From mechanical transmission to safety protection, every component is related to operational reliability and passenger safety.
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