Centrifugal pump operating parameters

The operating parameters of the centrifugal pump include the bearing temperature index of the pump, the bearing temperature index of the motor and the vibration index. The specific value needs to be determined according to the specific centrifugal pump model and usage conditions. Generally, you can refer to the following range: 1. Pump bearing temperature index: It is usually required that the bearing temperature of the pump does not exceed 80°C and should be maintained between 60 and 70°C under normal operating conditions. 2. Motor bearing temperature indicators: It is usually required that the bearing temperature of the motor does not exceed 85°C and should be maintained between 75~80°C under normal operating conditions. 3. Vibration indicators: The specific values ​​of vibration indicators are generally evaluated according to the international standard ISO 10816-3. It is generally required that the vertical vibration speed of a centrifugal pump does not exceed 4.5 mm/s and the horizontal vibration speed does not exceed 6 mm/s. The above data are for reference only, and specific operating parameters need to be adjusted and confirmed according to specific conditions. .

For rolling bearings, the maximum ambient temperature is 40 degrees, the maximum temperature rise is 40 degrees, and the maximum bearing temperature is 80 degrees. Domestic and several standards are stipulated in this way, and they are almost the same. Sliding bearings are rated at 115 to 120 degrees depending on the material. The vibration situation is as shown below.