The purpose of lubrication on tissue machines is to ensure that bearings, gears, and couplings operate smoothly for a long time by keeping the metal surfaces separated. Lubricants reduce friction, heat, and wear by maintaining an oil film between the moving metal surfaces. Oils and greases can both be used as lubricants, and each type has its advantages. Lubricants can be applied manually or by circulating or automatic systems. Circulating lube oil systems use heaters and water-cooled heat exchangers to maintain the oil in the proper temperature range, and filters to remove solid debris. Water and solid particulates can be removed from oils by vacuum dehydrators and centrifuges.
Learning Objectives
- Describe the functions of lubricants on tissue machines
- List the safety hazards and safety guidelines associated with lubrication systems
- Describe sliding, rolling, and fluid friction
- List the advantages of grease lubricants
- List and describe the main components of a circulating lube oil system, like those used on tissue machines