Applications of lubrication

• Only plain bearings that move at slow speeds and do not carry heavy loads should be lubricated with grease.
• Only plain bearings that move at slow speeds and do not carry heavy loads should be lubricated with grease.
• Lubrication of sliding surfaces is generally more difficult to lubricate than journals.
• Lubrication of sliding surfaces is generally more difficult to lubricate than journals.
• Examples of sliding surfaces that require lubrication:

  • Engine cross-heads
  • Shaping machine tables
  • Rams
• Examples of sliding surfaces that require lubrication:

  • Engine cross-heads
  • Shaping machine tables
  • Rams
• The function of a steam-cylinder lubricant is to form an oil film which will reduce friction and wear of sliding surfaces and prevent leakage of steam past valves, pistons and glades.
• The function of a steam-cylinder lubricant is to form an oil film which will reduce friction and wear of sliding surfaces and prevent leakage of steam past valves, pistons and glades.
• Steam cylinders is the normal method of introducing the oil.
• Steam cylinders is the normal method of introducing the oil.
• Label the following 'Lubricator for reciprocating motion' diagram:





  A ) Guides

  B ) Cross-head

  
• Steam turbines are provided with pressure-circulating systems.
• Steam turbines are provided with pressure-circulating systems.
• Lubrication of steam turbines:

  • The oil should provide adequate and dependable lubrication.
  • The oil should serve as a coolant and protect the turbine parts against rust.
• Lubrication of steam turbines:

  • The oil should provide adequate and dependable lubrication.
  • The oil should serve as a coolant and protect the turbine parts against rust.
• Lubrication of thrust bearings:

  • The oil should be fed at the point of least pressure, which is at the smaller diameter of the thrust area.
  • Centrifugal force will then fling the oil outwards, away from the shaft portion on to the thrust collars where it is needed most.
• Lubrication of thrust bearings:

  • The oil should be fed at the point of least pressure, which is at the smaller diameter of the thrust area.
  • Centrifugal force will then fling the oil outwards, away from the shaft portion on to the thrust collars where it is needed most.
• The main functions of lubricants for ball and roller bearings are:

  • To reduce friction between the various rolling parts of the bearing.
  • To assist in dissipating the heat generated within the bearing.
  • To protect the highly-polished working surfaces of the bearing from corrosion and rusting.
  • To assist in sealing the bearing against the entry of contaminants such as dust and moisture.
• The main functions of lubricants for ball and roller bearings are:

  • To reduce friction between the various rolling parts of the bearing.
  • To assist in dissipating the heat generated within the bearing.
  • To protect the highly-polished working surfaces of the bearing from corrosion and rusting.
  • To assist in sealing the bearing against the entry of contaminants such as dust and moisture.
• Oil is generally a more effective lubricant than grease, provided there are adequate sealing arrangements.
• Oil is generally a more effective lubricant than grease, provided there are adequate sealing arrangements.
• Oil lubrication is applied particularly for high temperatures and high speed.
• Oil lubrication is applied particularly for high temperatures and high speed.