When faced with tooth flank damage in large girth gear drives, it used to be that repairs could only be done by applying mechanical treatments and costly repair procedures.
Today, repair lubricants are available that can restore damaged tooth flank surfaces while the tooth flank remain in use, and does so with improved operating performance.
Obviously, this prevents a lot of downtime and repair costs. Repair lubrication provides several other advantages:
- It prevents the continuation of damage through the alleviation of stress risers and new tooth damage by improving the contact ratio.
- It only requires brief girth gear drive downtimes for control and documentation purposes during the repair lubrication process.
- It easily repairs scuffing, scratches and scorings. Plastic material deformation can be repaired up to a certain extent.
- It prevents formation of new pitting by eroding material at the overloaded flank parts, which leads to a more even load distribution over the tooth flanks and hence a reduction of specific tooth flank peak loads and a higher rolling endurance.
- It can prevent transfer damages from an older girth gear on a new pinion flank.
Due to the complexity of the repair process and the possibility of inadvertent damage, repair lubrication should only be carried out by a trained and experienced application engineer.
With expert implementation, however, repair lubrication is a smart solution that enables replacement of damaged large girth gears to be postponed for years.