Understanding Journal Bearings - EDGE

Understanding Journal BearingsMalcolm E. Leader, Machinery Dynamics , ColoradoABSTRACTThis paper covers the basic aspects of Journal Bearings including lubrication, design and application. Descriptions ofvarious types of Journal Bearings are presented. Guidance is given for choosing the proper bearing type and keeping yourbearings healthy. A section on do s and don ts gives practical are used to prevent friction between parts during relative movement. In machinery they fall into two primarycategories: anti-friction or rolling element Bearings and hydrodynamic Journal Bearings . The primary function of abearing is to carry load between a rotor and the case with as little wear as possible. This bearing function exists in almostevery occurrence of daily life from the watch on your wrist to the automobile you drive to the disk drive in yourcomputer. In industry, the use of Journal Bearings is specialized for rotating machinery both low and high speed.

Provide damping. Damping is required in order to pass through a critical speed. Damping is also required to suppress instabilities and subsynchronous vibration.! Able to withstand shock loads and other abuse.! Reduce noise.! Reduce transmitted vibration.! Provide electrical isolation of rotor to ground.! Very long life under normal load conditions.

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  Journal, Understanding, Noise, Bearing, Damping, Understanding journal bearings

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