Noise Source Identification and Noise Reduction of a Double Crank Four Ring-Plate-Type Cycloid Reducer

A double crank four ring-plate-type cycloid reducer is a new drive that has high load capacity and high transmission efficiency. The vibration and noise tests of the reducer prototype are completed using the HEAD acoustics multi-channel noise test and analysis system. The noise distributing laws of the reducer surface at different rotational speeds and different loads are obtained. The main noise sources "of the reducer are identified as the noise: 1) generated by involute spur gears when they mesh; 2) generated by the four ring-plates and cycloidal gear; and 3) radiated by the cylinder block vibration because of internal excitements. The relevant noise reduction measures are proposed for each of these noise sources. The experiment results show that noise reduction is achieved.