Vibration study on Journal Bearing

Mechanical Engineering

In machines, notably in engines and power plants, hydrodynamic bearings are frequently utilised. A revolving journal or sleeve is what makes up a bearing. The load is supported by the pressure that builds up in the convergent wedge with a changing form that is filled with a lubricant film. The primary goal in designing journal bearings is the load-carrying capability at the desired speed. To prevent contact between mating surfaces, the lubricant film's thickness must also be adequate. The lubricant film produced by the journal rotation in this case serves to isolate the bearing surface from the journal surface. The suitable lubricant must be chosen based on the application field as lubricants lose their film as a result of changes in temperature and pressure distribution. To determine the pressure distribution over the journal bearing for varied loads and speeds, we selected specific lubricants. We have decided to investigate the vibration pattern for two lubricants, namely spin 22 and 20W40, collected by accelerometer and analyzed by vibration analyzer to track the performance of journal bearing with various lubricants. With the help of the pressure distribution for each condition and the vibration patterns for various load and speed conditions for both oils provided in this project report, it is possible to determine the journal bearing's performance under each situation and choose the optimum lubricant to use.

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