| Summary: | 碩士 === 國立彰化師範大學 === 機電工程學系 === 96 === Improving the vibration problem is the main goal of this study for finding the optimal crankshaft counterweight of the reciprocating compressor. Therefore this research mainly aims for designing the appropriate crankshaft counterweight with effective way to reduce the vibration for a commercial reciprocating compressor. As the counterweight reduces the kinetic orbit of crankshaft connecting rod, the decreasing unbalanced orbit corresponds to less vibration.
First, we will establish an analytical model for computing the counterweight of the crank based on the dimension of air compressor and drive specifications. Design issue is created for a new crankshaft that fit the air compressor with vibration and noise requirements. Finite element software is used to simulate the modal and deformed situation under variant weight of the crank. Besides, spectrum analyzer for modal testing is introduced for analyzing signals from impulse hammer and accelerometer. Through analytical, simulation and experimentation, this research develops a complete process for crankshaft counterweight design. The designed crankshaft counterweight is implemented and verified through vibration reduction of 50.62%. Experimental result validates this research output.
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