Introduction to the Principle and Precautions of Multi-Stage Centrifugal Fans
Release date:
2021-06-20
What is the working principle of a multistage centrifugal fan? Below, a manufacturer of multistage centrifugal fans will provide a detailed introduction.
Multistage centrifugal fan How does it work? Below, a manufacturer of multi-stage centrifugal fans will provide a detailed introduction.
Working principle of multi-stage centrifugal fans: A multi-stage centrifugal fan works by using a high-speed rotating impeller to compress gas, increasing its pressure and velocity. The gas, having reached a certain pressure, flows out from the impeller’s edge at a higher velocity and enters the diffuser. As the gas speed decreases, part of its kinetic energy is converted into potential energy, causing the gas pressure to continue rising. Multi-stage centrifugal fan structure. Multistage centrifugal fan The structural main body is a cast housing, consisting of an intake shell, an intermediate shell, and an impeller. Typically, depending on the customer’s flow and pressure requirements, the intermediate shell and impeller can be connected in series to form multi-stage booster fans ranging from 2 to 8 stages. For special applications, the number of stages can be increased up to 10, achieving a pressure boost of up to 98 kPa. Currently, the manufactured fans can cover flow rates from 35 to 220 m³/min. The multistage centrifugal fans are directly driven by variable-frequency motors, with the fan and motor connected via a coupling. The fan bearings are equipped with temperature and vibration sensors to prevent damage caused by excessive temperature or intensified vibrations. Additionally, lifting holes, hooks, or lifting rings are installed on both the fan body and the base, making installation and maintenance easier. As part of our pre-sales service for mechanical centrifugal fans, during the trial run of multistage centrifugal fans, the motor must be started strictly according to the operating procedures.
Precautions for using multi-stage centrifugal fans: Timely maintenance and inspection of the lubrication system, use of clean lubricating oil, and thorough lubrication of all bearing parts are crucial measures to ensure an extended fan lifespan. During the initial period of operation of the blower, pay close attention to checking whether the oil has deteriorated or become contaminated with moisture, and ensure that the lubricant level in the oil chamber does not fall below one-half of the required level. However, Multistage centrifugal fan Just like other users, how should we control it? First, we must understand the several key components of a multistage centrifugal fan so that we can better monitor and control each component. A multistage centrifugal fan mainly consists of an air inlet, an air damper, an impeller, a motor, and an air outlet. Its performance varies depending on its operating conditions; therefore, as different parts operate under different conditions, the overall performance of the multistage centrifugal fan will be affected. To tune the multistage centrifugal fan to its ideal state, we can take a multi-faceted approach.
The multistage centrifugal fan is a unique type of centrifugal fan and serves as an industrial production machinery essential for the construction of conventional maglev tracks. A comparative analysis of the operational characteristics between floating centrifugal fans and multistage centrifugal fans: The magnetic levitation centrifugal fan adopts an integrated structure comprising a motor, a soft starter, and a magnetic levitation bearing. The motor’s shaft is directly connected to the centrifugal impeller, eliminating the need for transmission gears and mechanical couplings, thereby reducing equipment size and complexity. The system features DC frequency conversion for automatic adjustment and control of key output parameters such as exhaust volume and air pressure. Standard equipment includes a permanent magnet motor with high-speed rotor, a soft starter, active magnetic levitation bearings, local operation interface, and a safety protection software system. All components are integrally mounted on a common baseplate, eliminating the need for prefabricated foundations or fixed bases. Multistage centrifugal fan It is a unipolar patellar centrifugal fan, with its key technologies lying in magnetic levitation bearings and rare-earth permanent-magnet motors. The main component is the magnetic levitation bearing, which uses magnetic field forces to keep the transmission shaft suspended, ensuring smooth, friction-free operation of the patellar speed. Equipped with phase sensors, the system continuously monitors, adjusts, and detects faults in the motor’s transmission shaft. Its active control mechanism effectively suppresses unbalanced vibrations of the transmission shaft. The fan can be equipped with an uninterruptible power supply (UPS) as desired, and stringent power-off protection measures have been implemented. Multi-stage centrifugal fans require timely maintenance and regular inspection of the lubrication system.
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