Experimental Studies about the Effects of Dynamic Loads upon Gear Noise

抄録

In order to investigate the generating mechanism of gear noise, a power circulating type gear testing machine was installed in an anechoic room. From some preliminary measurements, the effects of operating conditions, accuracies, blank thickness and lubrication on gear noise were studied. The more detailed experiments were successively performed about the generating mechanism, with the test gear which had much involute errors. The largest source is considered to be the load fluctuations in the direction of line of action. Sound intensity is proportional to fluctuating load and square of fluctuating frequency. Tooth profile errors have much effects upon gear noise, especially under the light loads. If separation occurs at a certain speed, noise suddenly increases, and a strange noise of subharmonic frequency is occasionally built up.