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In one application, there is a complex relationship between the temperature and power loss of components, and correspondingly, these coefficients are interdependent with many factors such as bearing size, load and lubrication conditions.

They affect many of the performance characteristics of the application and its components, and depend on the running state in many ways when steady-state conditions are reached, such as at startup and during normal operation.

Estimating operating temperature and verifying limit speed are the key steps of application analysis.

This section describes these basic relationships in detail and guides you on the factors to consider.

Bearing operating temperature and heat flow

Temperature has an important effect on many performance characteristics of an application.The heat flow from the application or within the application determines the temperature of its components.

The steady-state temperature at which heat is at equilibrium.Working temperature:

Friction power loss between the bearing and the seal resulting in heat

Heat generated by the application is transferred to the bearing through the shaft, bearing housing, base and other surrounding components

Heat dissipated from the bearings is carried away by shafts, housings, bases, lubricating cooling systems (if used) and other cooling devices

The operating temperature of the bearing depends not only on the friction generated by the bearing, but also on the design of the application.Therefore, bearings, their adjacent components and applications should be subjected to thermal analysis.

Bearing dimensions, operating temperature and lubrication conditions

For a given bearing type, bearing size, operating temperature, and lubrication conditions are interdependent as follows:

Select the bearing size according to the bearing load, speed and lubrication conditions.

The operating temperature is a function of the bearing load, size, speed and lubrication conditions.

Lubrication conditions depend on the operating temperature, viscosity and speed of the lubricant.

These interdependencies can be analyzed by iterative method to realize excellent bearing configuration design and select suitable components for them.