Hello everyone!
I need help, guys. My fan started vibrating even without material. I have trouble finding the heavy spot. I attempted to spin the drum so that it stopped with the heavy spot at the bottom and attached a weight on top. After this, the drum stopped halting with the heavy spot at the bottom, and the vibration got slightly better, but it's still there.
I inspected the bearings and one bearing was replaced because it was loose. The situation improved a little, but the vibration is still present. What are some ways to eliminate the vibration?
I considered buying balancing instruments, as I also own a mower and drying fans. I found a few under $5000: Vibromera, ADASH, ACEPOM322 (Chinese). What else would you recommend looking at?
Thanks in advance for your advice!
Greetings!
Thank you for your insight. That clarifies a lot. I'll look into dynamic balancing. For balancing equipment, I also found that the Balanset-1A is highly recommended in terms of price and quality. Here’s a table of some popular devices with approximate prices:
Balanset-1A portable balancing equipment & vibration analyzer: €1,751
FMB-200 Dynamic Balancer by FECON: $4,950
ACEPOM322 Vibration Analyzer and Field Dynamic Balancer: $4,500.00
Adash A4500 VA5 Pro Vibration Analyzer – Thermal Imaging – Ultrasound: $6,200.00
Vibration Analyzer AX-F CMXA 80-F-K-SL by Acepom: $6,500.00
HG904 Hot Sale Double Channels Portable Vibration Analyzer Dynamic Balancer: $7,150.00
Wishing you good luck with your repairs!
Hi there!
What you did is called static balancing, and it is only suitable for narrow rotors, like grinding wheels. Imagine you have a wide rotor: one side has the heavy spot at the bottom, and the other side has the heavy spot at the top. When you rotate it 90 degrees, these spots balance each other out, and the rotor doesn’t turn with the heavy spot down. But when you start it spinning, these heavy spots create centrifugal force, resulting in vibration. This is called couple imbalance, and it can only be corrected with dynamic balancing because it doesn’t show in static balancing.
If I were you, I’d also check for cracks on welded joints and bolt tightness.