National Standard For Noise Of Hydraulic Winch

With the increasing scale of national transportation infrastructure and urban construction, the scale and power of hydraulic winch used in construction projects are becoming larger and larger, and the traction speed is becoming faster and faster. Accordingly, the size of drum open gear pair structure, the key transmission part of hydraulic winch, is becoming larger and larger, and the noise of hydraulic winch is becoming higher and higher under the condition of high power and high speed operation, However, this is not allowed by national standards. The national standard gb1955-2002 for building hoists stipulates that the qualified noise limit of hoists shall not be greater than 85dB (a) outside the machine and 88DB (a) at the operator's ear.