Analyze energy saving in determining the capacity of centrifuge motor

1. According to the recommended method, it is not appropriate to determine the motor power of the continuous operation centrifuge (especially the continuous operation, intermittent operation scraper discharge centrifuge), which is based on the maximum discharge power. The reason is that the motor capacity is too large and the design is too conservative. The selected motor is in a low load state for most of the operating period under normal operating conditions, resulting in a low motor power factor, high energy waste, and no energy saving requirements.

2. If the motor capacity is insufficient (when the operating conditions and various actual conditions are not expected), the motor may not start up in case of an accident, and this situation should be taken seriously.

3. From the perspective of energy saving, it is hoped that the selected motor will work under the condition of rated power or as close as possible to the rated power, so that the motor power factor is relatively high and meets the energy saving requirements. This is the meaning of determining the motor capacity according to the "equal power method" described earlier. The reason why this method is reasonable is that when selecting the motor, it refers to the maximum power of the centrifuge in one operating cycle (such as discharge power), but not fully considering the maximum power, allowing the selected motor to be short during operation. The overload of the time part. In order to properly solve the overload problem of the motor when the centrifuge is started, measures such as setting the centrifugal friction clutch or the hydraulic coupling can be adopted, and the latter application is more suitable in the case of explosion-proof requirements. Their application principle is that the friction plate drives the pulley or the liquid impact turbine to slowly start the centrifuge and gradually reach the working speed. Therefore, this kind of measure is actually trying to extend the start-up time to avoid the unreasonable selection of the motor with excessive power due to the difficulty of starting the centrifuge. At the same time, with the clutch or the coupling, the start of the centrifuge can be relatively stable and prevent the starting torque from being excessive. Large and overloaded the motor.

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Hun Yuan Ya Lian Wan Jia Dian Zi Shang Wu You Xian Ze Ren Gong Si , https://www.ylwjastragalus.com