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Introduction and difference between air levitation blower and magnetic levitation blower

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The levitation centrifugal blower uses permanent magnet bearings, direct coupling technology, high-efficiency impellers, high-speed motors, and no additional friction. The fan automatically adjusts the power consumption of the motor according to the output (air volume adjustable range 45-100%) to maintain the high efficiency of the equipment operation.


Using copper rotor suspension bearing and direct connection technology, no vibration is generated, and the vibration intensity of the magnetic levitation fan blower (on the base) is less than 2.5mm/s. The magnetic levitation fan does not need to be equipped with a sound insulation device; the equipment is light in weight, no special foundation is required, and the installation and layout are simple and flexible. When the whole machine is running, the noise (including the motor) at 1m outside the soundproof cover is lower than 80db (A). (The blower itself does not produce noise, only the airflow noise of the air duct.) The outlet pressure is stable and there will be no pulse phenomenon. Magnetic levitation fan


No lubricating oil


The fan adopts copper rotor suspension bearing technology, the system does not require a lubricating oil system, and provides clean air to special industries such as electronics, medicine, and food. The operating temperature of the air bearing reaches 600 degrees, and all the drawbacks of the oil bearing system have been successfully solved.


No maintenance


There is no gearbox and oil bearing required for traditional wind turbines. The series of high-tech impellers and motors that we have adopted do not use couplings, are directly connected, and have an intelligent control system. The key components adopt AL7075 (aviation aluminum). These technologies ensure that the equipment is Maintenance-free reduces the user's maintenance cost and improves the stability of the air supply system.


Convenient operation control


The fan can be self-checked on the number of revolutions, pressure, temperature, flow rate, etc. of the fan on a personal computer and operated at constant pressure, load/no-load operation, overload control, and unmanned operation through anti-surge control. The fan adjusts the flow rate by adjusting the number of revolutions of the impeller. According to the changes in the temperature and pressure of the intake air, the flow rate can be easily adjusted by adjusting the number of revolutions. The flow can be adjusted automatically and manually.


Equipment installation space


The blower equipment is light in weight, small in size, and easy to install, which can greatly save the user's investment in the building and auxiliary electrical control system.


Parallel operation


Multiple blowers can be operated in parallel. Under the conditions of parallel operation, each blower can meet the adjustment needs of different flow rates and keep the safety margin between each blower outlet pressure and surge pressure the same. Any single blower can be started and stopped. Will not affect the air volume changes of other blowers. When the rated load of the motor is 60%, the wind pressure can meet the process requirements, and there will be no surge when multiple fans are running in parallel.


The design of the blower takes into account the airflow synchronization, so that the new blower can be operated in parallel with the original blower.


Anti-surge


The blower also provides and installs a device to monitor the blower's surge. The following three surge treatment modes are available: boundary adjustment mode, shutdown mode and continuous operation mode. When the machine is set to "continue running" mode, the surge that occurs will not cause any adverse effects on the machine. When the machine is set to "Stop Mode" and surging occurs, the machine will automatically stop for the operator to check the cause of the surging. When the machine is set to "boundary adjustment mode", the operating parameters can be intelligently adjusted when the fan operating point is near the surge boundary to return it to the normal operating area. This "boundary adjustment mode" is the most commonly used setting mode.


2. Magnetic levitation blower


1. Working principle


The magnetic levitation centrifugal blower is a new type of high-efficiency, environmental protection, energy-saving, and energy-saving blower formed by integrating magnetic bearing technology and high-speed motor technology into traditional fans. The magnetic bearing is controlled by the inner magnetic levitation bearing, and the magnetic field is generated by the electric current, and the magnetic field generates the attraction force at the same time, so as to realize the levitation of the rotating shaft. The high-speed motor generates a frequency-controllable alternating current through the variable frequency power supply and inputs the alternating magnetic field generated by the stator of the motor to drive the shaft to rotate at a high speed, which is a synchronous permanent magnet motor. With the high-speed rotation of the rotating shaft, the blower impeller drives the air to enter from the inlet of the volute. The air is guided and pressurized by the volute to become a gas with a certain flow rate and pressure, and finally blows out from the outlet of the volute. .


2. Performance characteristics


Energy-saving and high-efficiency, the magnetic suspension bearing used in the magnetic suspension centrifugal blower has no mechanical loss and contact loss, which can meet the high speed stepless variable speed regulation.


The cooling efficiency is high. The cooling system uses two methods that combine water-cooling and air-cooling, which can effectively protect the motor and meet the requirements of the fan to start and stop at any time.


Low noise and convenient installation. Because of the overall box structure, the fan noise is less than 80 decibels, the vibration range of the machine body is extremely small, the installation foundation requirements are low, and the installation is convenient.


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