文章來源： 作者：羅茨機電 發布時間：2022-01-19 瀏覽次數：533
At the same speed and voltage of Roots blower, the greater the power, the greater the pressure. The power is equal to the voltage multiplied by the current. In other words, at the same speed and voltage, the greater the current, the greater the power. The speed of the three-phase motor is fixed. After holding the pressure, the motor load is large, which is easy to exceed the current and burn the motor. Roots fan is a positive displacement fan, and the air flow conveyed is directly proportional to the number of revolutions. Each time the three blade impeller rotates, two impellers conduct suction and exhaust for three times. Compared with the two blade type, the gas pulsation is reduced, the load change is small, the mechanical strength is high, the noise is low and the vibration is small. Two three blade impellers are arranged on the two parallel shafts, and a small spacing is always maintained between the wheel and the inner hole surface of the oval chassis and each impeller.
Since the impeller rotates at a certain speed in the opposite direction, a certain amount of gas surrounded by the box and impeller is transported from the suction side to the discharge side. Because roots blower belongs to constant flow fan, the main working parameter is air volume. The output pressure depends on the change of pipeline and load, and the change of air volume is very small. Roots blower is a kind of high-pressure fan. Roots blower is a positive displacement fan. The delivered air flow is directly proportional to the number of revolutions and transports the gas from the suction side to the discharge side. If the load requires a certain pressure effect, use a centrifugal fan. Centrifugal fan belongs to constant pressure fan, so the main working parameter is wind pressure. The output air flow depends on the change of pipeline and load, and the wind pressure changes little. Centrifugal fan, low wind pressure. The compression process of air is usually carried out under the action of several working impellers or several stages of centrifugal force. The centrifugal fan belongs to the square torque characteristic, and the Roots fan basically belongs to the constant torque characteristic.
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