JKS INTERNATIONAL

Self-lubricating Bearing and Bush Design Calculating Method

Estimate the expected service duration based on load, speed, and environment.

Evaluate lubricant needs depending on the material, load, temperature, and movement conditions.

Select bearing material based on thermal resistance, wear, load capacity, and self-lubrication ability.

Equivalent dynamic load (W): Calculate the equivalent dynamic load based on the actual loads acting on the bearing.
Basic dynamic load rating (C): Determine the bearing's load capacity based on its dimensions and material.
Rating life (L): Calculate the expected life of the bearing in revolutions or hours, based on the load and operating conditions.

PV Value: The pressure-velocity (PV) value indicates the heat generated in the bearing due to friction. It is a key factor in determining the bearing's suitability for an application.
PV Limit: Self-lubricating bearings have a PV limit, which is the maximum PV value they can withstand without excessive wear or failure.
Heat Dissipation: Consider the bearing's ability to dissipate heat, as excessive heat can degrade the lubricant and reduce bearing life.
Lubrication Film: For some self-lubricating bearings, a thin lubricating film is formed by the migration of lubricants from the bearing material to the contact surface. The thickness of this film is crucial for low friction and wear.

Bearing Dimensions: Determine the appropriate bearing dimensions (inner diameter, outer diameter, width) based on the load, speed, and space requirements.
Shaft and Housing Fits: Ensure proper fits between the bearing, shaft, and housing to prevent excessive play or fretting.
Break-in Period: Self-lubricating bearings often require a break-in period to transfer the lubricant to the contact surface and achieve optimal performance.

Finite Element Analysis (FEA): For complex applications, FEA can be used to simulate the bearing's behavior under load and predict its performance.
Experimental Testing: Conducting tribological tests (friction and wear tests) can help validate the bearing design and optimize its performance.
Design Optimization: Parametric optimization techniques can be used to explore different design parameters and find the optimal bearing design for a specific application.