The noise performance of worm gear reducers varies significantly depending on the model, structural design and working conditions. The core differences are mainly reflected in three aspects: normal operating sound characteristics, abnormal noise types and causes. The following is a specific analysis based on common types:
1. Comparison of typical noise characteristics of different types of reducers
1, NMRV series (aluminum alloy box)
Normal noise: Smooth operation. The noise is usually controlled below 60 decibels when no-load. There is a slight 'rustling' sound, which is a normal sliding friction sound.
Abnormal performance: If there is a 'clicking' impact sound or a 'howling' high-frequency sound, it is mostly related to poor lubrication or improper meshing clearance.
2. SCWU series (cast iron box, heavy-duty type)
Normal noise: Mainly medium and low frequency 'buzzing' sound, with strong structural rigidity and small vibration.
Abnormal performance: Under abnormal working conditions, 'gnawing' abnormal noises and shell numbness are prone to occur. This is often caused by installation deviation or overload, which causes the rupture of the oil film and causes metal friction.
2. Root cause of noise difference: influence of structure and materials
3. Common abnormal noise types and their diagnostic directions
The 'rustling' sound intensifies → Insufficient lubrication or the lubricating oil is mixed with copper powder, indicating wear of the worm gear
'click' periodic impact → The tooth surface is pitted, peeled or broken, and the machine needs to be shut down for inspection.
'Whisting' high-frequency sound → The meshing is too tight or the oil film is broken, accompanied by a temperature rise exceeding 80℃
'Buzzing' resonance sound → Coaxiality deviation or insufficient base rigidity, often caused by improper installation
'clatter' loose sound → The fastener is loose or the bearing is moving axially, and the gap can be sensed manually
