Comparison of magnetic suspension single-stage centrifugal blower VS multi-stage centrifugal blower

(1) Multi-stage centrifugal blower uses the inlet throttle net to adjust the flow, which leads to the loss of inlet resistance. Even if the flow rate is 70% of the design flow rate, the throttle net is still needed to adjust the flow rate. Magnetic suspension single-stage centrifugal blower adopts frequency regulator to adjust air volume, which is more energy-saving than throttle valve.

(2) Multi-stage centrifugal blower adopts multiple impellers, which inevitably leads to interstage loss. The magnetic suspension single-stage centrifugal blower adopts a single impeller, and there is no interstage loss.

(3) Multi-stage centrifugal blower is a rolling bearing or a sliding bearing, which belongs to relative friction movement, and there is bound to be wear and useless work consumption. The bearings of magnetic suspension single-stage centrifugal blower have no contact, wear and useless work consumption during operation.

(4) Generally, the air volume adjustment range of the current centrifugal blower is 65%~100%, and that of the magnetic suspension single-stage centrifugal blower is 45%~100%.

(5) Magnetic suspension single-stage centrifugal blower needs to be imported from abroad, so the direct investment of equipment is greater than that of multi-stage centrifugal blower.

(6) Although the rotating speed of multistage centrifugal blower is low, the bearing is still worn, and the lubricating oil should be replaced regularly. Although the magnetic suspension single-stage centrifugal blower has a high rotating speed, various components operate in a non-contact manner, without wear and need of lubricating oil. The main component of the magnetic suspension bearing is replaced once every 20 years, and the price is generally 100,000 yuan.

Comparison of magnetic suspension single-stage centrifugal blower VS traditional single-stage centrifugal blower

(1) The traditional single-stage centrifugal blower adopts the structure of low-speed motor+speed-increasing gearbox+rolling or sliding mechanical bearing+mechanical guide vane, and the air volume is adjusted by mechanical guide vane, so it is impossible to use frequency conversion adjustment, and there is resistance loss. The magnetic suspension single-stage centrifugal blower adopts frequency converter to adjust the air volume, which is relatively energy-saving.

(2) The traditional single-stage centrifugal blower adopts rolling or sliding mechanical bearings, which have short bearing life, need complex hole lubricating oil and shaft sealing system, and have wear and useless work consumption; The bearings of magnetic suspension single-stage centrifugal blower have no contact, wear and useless work consumption during operation.

(3) The traditional single-stage centrifugal blower has hundreds of mechanical moving parts, which has high failure frequency, relatively complicated maintenance and high direct maintenance costs. The maintenance cost of magnetic suspension single-stage centrifugal blower is low.

(4) The traditional single-stage centrifugal blower needs an anti-vibration device, the foundation needs special treatment, the structural size is large, the floor area is large, and the voice is high (above 90dB), so it needs a sound insulation cover. The magnetic suspension single-stage centrifugal blower occupies a small area, has no vibration, does not need special foundation treatment, and the noise is below 80dB.