Abnormal noise from elevator doors is one of the most common issues reported by clients. Although it usually does not directly affect operational safety, it significantly reduces ride comfort and can even raise concerns about the overall quality of the elevator.
Common causes include:
1. Worn guide rails and pulleys
Over time, door operator guide rails and pulleys wear out or lose lubrication, causing friction or clicking sounds during opening and closing. This is the most common cause.
2. Loose door operator belt or wire rope
Insufficient belt tension or a slack wire rope can cause vibration and noise during start and stop.
3. Foreign objects in the sill groove
Sand, dust, or small objects trapped in the door sill groove produce harsh friction sounds as the door slides. This is especially common on construction sites.
4. Improper engagement of door knife and lock
Incorrect clearance between the door knife and landing door lock hook can cause impact noise during operation.
5. Insufficient installation precision
Deviations in door frame verticality, door gap, or door operator position can lead to uneven movement and abnormal noise.
How to fix it?
First, clean the sill groove and check lubrication. Then inspect belt tension and pulley wear. Finally, verify the clearance between the door knife and lock. If the noise persists, professional maintenance personnel should re-calibrate the door operator using its self-learning function.
Selection tips
When purchasing elevators, pay attention to the door operator brand, pulley material, and guide rail craftsmanship. A high-quality door system is not only quieter but also more durable.