How much does a high air volume multi-stage centrifugal fan cost

Working Principle:

A multi-stage centrifugal blower works on gas through a high-speed rotating impeller, adding mechanical energy to the gas to increase its velocity. Gas with a certain pressure flows out of the impeller at a higher speed, and the gas velocity is reduced by a diffuser, converting a portion of the kinetic energy of the gas into pressure energy and increasing its pressure. After being compressed by multi-stage impellers, the gas that reaches the required pressure is collected by the volute and discharged into the device through the exhaust port.

Multi stage centrifugal blowers are widely used in various smelting blast furnaces and iron furnaces for blowing air, supporting coal washing jigs, mining flotation, sewage aeration, chemical gasification and other occasions that require air transportation. They can also be used to transport other special gases. This series of blowers has the characteristics of high efficiency, low noise, smooth operation, * pulse, wide stable area, clean, dry and oil-free gas transportation, few vulnerable parts, and easy installation, operation, and maintenance.

The difference between multi-stage centrifugal blower and Roots blower

The differences between the two can be addressed by starting with their operation. Their operating rules are different and their application approaches are also not very similar. In order to better help everyone understand, we will carefully analyze where their differences lie.

1. Let's start with the working principles of Roots blower and multi-stage centrifugal blower

Roots blower is a type of positive displacement fan that relies on the rotation of the impeller to achieve air transmission. There is always a small gap between the impeller and the inner wall of the casing, between the impeller and the wall panel, and between the impellers of the Roots blower. In this way, under the drive of the synchronous gear, gas can be transported from the inlet of the Roots blower along the inner wall of the Roots blower housing to the outlet side.

The working principle of multi-stage centrifugal blower is similar to that of centrifugal ventilator. The high-speed rotation of the rotor drives the air to move at high speed, and centrifugal force is used to make the air flow along the involute shape of the casing towards the outlet of the fan.

2. The working parameters and usage locations of Roots blower and multi-stage centrifugal blower are different. Roots blower belongs to constant flow volumetric blower, and the main working parameter is air volume. The output pressure of the Roots blower varies with changes in the pipeline and load, while the air volume changes very little. Centrifugal blower belongs to constant pressure blower, and its main working parameter is pressure. The output air volume varies with the changes in pipeline and load, and the pressure change is not significant. Therefore, if the load requires a constant flow effect, Roots blower is the preferred choice. If the load requires constant pressure effect, centrifugal blowers are even better.

Multi stage centrifugal fans and Roots blowers are actually two different types of blowers, and they are also relatively common models. It is better to distinguish them and it is more conducive to our future use. Due to their different placement and purposes, there will be many different types of blowers. Therefore, before purchasing and using them, we must first determine the product model and application scope.

Performance parameter table of C20-1.4 multi-stage centrifugal fan

Multi stage centrifugal blower product real-life shooting

Overview of Characteristics of C20-1.4 Multi stage Centrifugal Fan:

1. By citing excellent turbine machinery technology from the United States and Germany, and integrating industrial experience, we have developed high-speed, energy-saving, high-efficiency, and low-noise products. Compared with other domestic multi-stage centrifugal fan manufacturers of the same model, the power is reduced by 10% -15%.

2. Low vibration, fan bearing vibration<4mm/s, can be used without using anchor bolts for fixation!

3. The motor adopts a specially designed high-efficiency wideband motor with a frequency of 30-70Hz and a speed of 4000r/min. The motor uses imported SKF bearings from Sweden, standard variable frequency motor enameled wire, and the main shaft is coated with ceramic to eliminate magnetic fields and improve efficiency.

Generally, manufacturers of similar multi-stage centrifugal fans use ordinary two-stage motors with a frequency of 50Hz and a speed of 2900r/min.

4. Zungu multi-stage centrifugal fan standard configuration monitoring device. The monitoring cabinet monitors the fan current, voltage, speed, vibration, and temperature in real-time. Two sets of vibration sensors and two sets of temperature sensors are installed at both ends of the centrifugal fan. When the fan temperature or vibration exceeds the set range, the power is automatically cut off and the fan stops running to avoid serious damage to the fan caused by surge or other abnormal situations. The fan monitoring cabinet can achieve nearby or remote control of the fan. Other similar products in China generally do not have this configuration.

5. The fan adopts forced air cooling, with bearings and oil tanks attached to both ends of the casing, effectively isolating the temperature transmission of the fan casing. A cooling fan is also installed, effectively eliminating the drawbacks of using water circulation to cool the fan in different regions and reducing the cost of use.

6. The fan casing is made of HT250 high-quality cast iron, and the impeller is made of aluminum alloy gravity cast steel mold. The bearings are imported from SKF, Sweden. Stable performance and long service life.

7. The oil tank uses Shell lubricating oil from the United States.

Broadband energy-saving multi-stage centrifugal fans can replace Roots fans above SR150. A miniaturized multi-stage centrifugal fan with an air volume of 15-30m3/min reduces the cost to the price level of Roots fans with soundproof covers. However, the advantages of energy conservation, noise reduction, and a sudden increase in technological sophistication are evident. Cost advantage and environmental adaptability, comparable to other types of fans! The miniaturized multi-stage centrifugal fan (air volume 15-30m3/min) further expands the flow range of the multi-stage centrifugal fan series products (15-220m3/min), with a speed of 3550rpm-10000rpm,. Stability, energy saving, noise reduction, low cost, easy maintenance, fan environmental protection industry, endless improvement, pursuit of unlimited.