Greetings, dear forum members!
I need some advice. My shaft is showing significant vibration with an empty drum. I can't find the heavy spot. I spun the drum so that it halted with the heavy spot at the bottom and placed a weight on top. After this, the drum no longer stops with the heavy spot at the bottom, and the vibration improved slightly, but it's still noticeable.
I examined the bearings and replaced one because I found it loose. The vibration reduced slightly, but the vibration issue remains. How can I eliminate the vibration?
I’m planning to purchase balancing instruments, as I also have a mower and drying fans. I looked at some options under $5000: Vibromera, ADASH, ACEPOM322 (Chinese). What else should I consider?
Thanks in advance for your help!
Hi everyone!
Thank you for the clarification. That explains a lot. I’ll focus on dynamic balancing. Regarding balancing equipment, the Balanset-1A seems to be the best option considering price and quality. Here’s a table with approximate prices of some popular devices, but please verify for accuracy:
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
Best of luck with your repairs!
Hello!
Your method is known as static balancing, and it works well only for narrow rotors, for example, grinding wheels. Consider a wide rotor: one side’s heavy spot is at the bottom, and the heavy spot on the other side is at the top. When you turn it 90 degrees, these heavy spots balance out, and the rotor stops rotating heavy side down. However, when you start spinning it, these points generate centrifugal force, leading to vibration. This is called couple unbalance, and it is only fixed by dynamic balancing, as it doesn't appear in static balancing.
You should also look for cracks in the welded joints and ensure bolt tightness.