Mechanism Of Lubrications (thick Film) Presentation
|Lubrication is essential in reducing friction and wear between moving surfaces.|
Thick Film Lubrication is a mechanism that involves the formation of a thick layer of lubricant between surfaces.
It provides superior load-carrying capacity and is commonly used in heavy-duty applications.
|Types of Thick Film Lubrication|
|Hydrodynamic Lubrication: Occurs when a fluid film is formed due to the relative motion between surfaces.|
Elastohydrodynamic Lubrication (EHL): Involves the deformation of lubricant and surfaces under high loads.
Squeeze Film Lubrication: Occurs when the lubricant is squeezed between surfaces due to external forces.
|Mechanism of Hydrodynamic Lubrication|
|The relative motion between surfaces causes a pressure gradient in the lubricant.|
This pressure gradient generates a hydrodynamic wedge, lifting the surfaces apart.
The lubricant film thickness should be greater than the surface roughness to prevent metal-to-metal contact.
|Mechanism of Elastohydrodynamic Lubrication (EHL)|
|EHL occurs under high loads and high speeds where the lubricant experiences severe deformation.|
The lubricant forms a pressurized film between the surfaces, preventing direct contact.
The lubricant viscosity and elasticity play a crucial role in sustaining the film.
|Mechanism of Squeeze Film Lubrication|
|Squeeze film lubrication occurs when external forces compress the lubricant between surfaces.|
The lubricant acts as a cushion, absorbing and distributing the load evenly.
It is commonly used in journal bearings and thrust bearings.
|Benefits of Thick Film Lubrication|
|Reduction in friction and wear between moving surfaces.|
Increased load-carrying capacity, allowing for higher load applications.
Improved protection against surface damage and corrosion.
|Factors Affecting Thick Film Lubrication|
|Lubricant viscosity: Higher viscosity provides a thicker film for better lubrication.|
Surface roughness: Smoother surfaces reduce the risk of metal-to-metal contact.
Operating temperature: Extreme temperatures can affect the lubricant's viscosity and performance.
|Applications of Thick Film Lubrication|
|Heavy machinery and equipment, such as engines, turbines, and gearboxes.|
Automotive industry for engine and transmission components.
Industrial applications, including steel mills, paper mills, and power plants.
|Maintenance and Considerations|
|Regular lubricant analysis to ensure proper viscosity and contamination levels.|
Periodic checks of lubricant film thickness and surface condition.
Adequate lubricant replenishment and filtration to maintain optimal performance.
|Thick Film Lubrication is a crucial mechanism in reducing friction and wear between moving surfaces.|
It provides superior load-carrying capacity and protection against surface damage.
Understanding the mechanism and factors influencing thick film lubrication is essential for proper maintenance and application.