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Hi everybody. last week our subcontractor report a vibration test on our Sundyne LMC337 compressor. They told us that there is a high frequency vibration pick value which shows that we have problem with thrust washers and we need to replace them. I have a question that basically how is...

if you can send drawing from your part, It might be helpful to talk about your problem. the permissible residual unbalance must be calculated according to ISO 1940-1. this value is calculated for center of gravity and if you want to have a dynamic two plane balance, you must recalculate the...

SSF: Steady State Dynamic this method generate critical speeds and critical domain after calculating eigenfrequencies. This is Finite Element and you need experimental investigations to validate and update your model.

you can also use experimental modal analysis. or if you have a complete, updated finite element model, you can use SSD to find critical speeds.

Gerotor oil pumps are basically unidirectional. if the rotating direction changes, the input and output port needs to be replaced. a few manufacturers claim that their oil pumps are bi directional (reversible) and if the start up rotating direction is not correct, the lubrication system remains...