Sunday 16 March 2014

What influences efficiency of V-Belt?




V-belt efficiency depends on the load being transmitted, sheave sizes, the number and size of belts, and their temperature. But most of all, efficiency is affected by installation and maintenance factors, such as tension, misalignment, and worn sheaves.
A well-designed, properly aligned and tensioned V-belt drive is most efficient — about 97% — when first installed. With time and use, the belts stretch, lose tension, and begin to slip in their sheaves. The result: efficiency drops to about 94%, provided that the sheaves are in good condition and slippage is normal. To minimize this drop in efficiency over time, keep belts properly tensioned and aligned.


Saturday 1 March 2014



Most common V belt causes of belt failure.



Listed here are some of the most common V belt causes of belt failure.
        Worn or damaged Sheaves.
        Sheaves Misaligned
        Insufficient Tension
        Wrong Belt Cross-Section or Type
        Improper or Prolonged Storage
        Excessive Heat
        Excessive Oil or Grease
        Use of Belt Dressing
        Abrasive Environment
        Excessive Moisture
        Inappropriate Sheave Material
        Improper Tensioned Idler
        Belts Rubbing Guard
         Belts Pried On or Misplaced Slack
         Defective or Worn Backside Idler
         Excessive Exposure to Oil or Grease
         Use of Belt Dressing
         Worn or Damaged Sheaves
         Insufficient Tension
         Wrong Belt Cross-Section or Type
        Overload Drive-Underbelting
         Insufficient Wrap on Small Sheave
        Foreign Objects In Grooves
        Sheaves Too Small
         Backside Idler
         Sheaves Misaligned
         Improper or Prolonged Storage
         Excessive Tension
         Worn or Damaged Sheaves
         Prying open The Split With a Screwdriver