油圧用ディサージャの実験研究

抄録

A special silencer (desurger) was developed at Kawasaki Dockyard Co. Ltd. to attenuate noises in a wide range, caused by high speed pumps, motors and oil piping systems. This, as can be seen from Fig.2, comprises a perforated pipe surrounded by a gas vessel. The gas vessel is precharged rather like a rubber-bag accumlator. And then, some tests on this desurger were performed and the results were as follows ; (1) It is possible to attenuate some of the noise by the use of this device. (2) The cut off frequency of this device is relatively low, and it shows effective damping over a wide range of frequency. (3) Precharged gas pressure is effective over pressure ranges from 60 to 90 percent of the system pressure. (4) Small holes seem to bo more likely to the perforated pipe rather than large holes. Suitable design of a special silencer, can make relatively noiseless out-put.