Magnetic levitation technology:
Suspending objects in the air is a dream of mankind since ancient times. Magnetic levitation technology is a technology that uses magnetism to overcome gravity to suspend objects. We are familiar with the magnetic levitation train. In fact, the magnetic levitation blower is also a typical application of this technology in the industrial field.
working principle:
The RAETTS magnetic suspension blower adopts the direct drive structure of high-speed permanent magnet synchronous motor, and integrates the centrifugal impeller and motor drive. It detects the vibration of the rotor shaft and the space gap of the rotor shaft in real time through the built-in displacement sensor, sends the obtained signal to the magnetic suspension bearing controller for conditioning, analysis and calculation, and generates control current, Then the current is input into the magnetic bearing winding to generate electromagnetic force, so as to realize the suspension of the rotor shaft. The magnetic suspension blower is equipped with magnetic suspension bearing, high-speed permanent magnet synchronous motor and three-dimensional flow impeller, direct drive structure, integrated design of centrifugal impeller and motor drive, efficient frequency converter speed regulation, intelligent monitoring control and unmanned watch. When the fan starts, it suspends first and then rotates. It belongs to active suspension, no friction, no lubrication. The three-dimensional flow impeller is directly connected with the rotor, with zero transmission loss. It is a high-tech, green, energy-saving and environmental protection product.
Core design:
1. Ultra efficient permanent magnet synchronous motor
The efficiency of the motor is more than 96%. Compared with other motors, it is small in size, small in power loss, and compact in thermal protection structure. The optimized high-speed rotation design precisely controls the speed and provides surging power.
2. Magnetic bearing technology
The magnetic suspension bearing system is the core system of the magnetic suspension blower. The motor rotor is fixed between two radial magnetic bearings and two axial magnetic bearings. The position of the rotor is detected by the position sensor, and the position signal is real-time reflected to the magnetic bearing controller. No contact between shaft and bearing, no need of lubricating oil, extremely low energy consumption, high efficiency, suitable for a variety of working environments.
3. Three dimensional flow turbine technology
Based on the three-dimensional flow theory, the inner space of the impeller is infinitely divided, a scientific fluid flow model is established, and the grid division and flow field calculation are carried out to ensure that the setting angle, number of blades, and section shape are reasonable and efficient. Avoid flow separation of blades, reduce flow loss, ensure smooth air flow, uniform transmission, and ensure optimal flow and efficiency.
4. Intelligent management system
In addition to the main control system, the Leitz magnetic suspension blower is also equipped with a global wireless communication intelligent management service system. With the help of intelligent hardware and software equipment, the system monitors the speed, temperature, pressure, flow, power and other parameters through wireless communication technology to achieve unmanned duty.
5. Other key technologies
Original cooling technology: air cooling or water-cooling models, good cooling effect;
Two stage compression technology: two stage impellers are matched efficiently, and the pressure can reach 150kPa;
Intelligent PLC control system: support 485/dry contact/Ethernet and other communication modes;
Product features:
1. High energy saving: The energy saving rate of Leitz air suspension fan is greatly improved compared with the traditional fan, and it has obvious energy saving advantages compared with similar fans.
2. High efficiency: The ultra-high efficiency permanent magnet synchronous motor is equipped with a three-dimensional flow turbine, which makes the comprehensive efficiency as high as 86% (the efficiency of the traditional Roots blower is only 55-60%). It is a national second-class energy efficiency equipment product.
3. Environmental protection and low noise: small size, light weight, no mechanical friction, no mechanical vibration, no oil stain, the noise is lower than 85dB, and the noise of traditional fans is higher than 100dB.
4. Scientific structure: Direct drive, active suspension, support frequent start and stop, UPS power supply provides power failure protection. The vector free frequency conversion control uses the method of frequency adjustment to control the rotation of the permanent magnet motor, thus controlling the flow of the blower to meet the use of various working conditions. The intelligent control system can predict surge and realize local control, and the equipment installed with GPRS system can realize remote monitoring and data transmission.
5. Semi permanent life: Integrated design, modular management, simple structure, small size, high efficiency, unattended, maintenance free, and semi permanent service life under normal working conditions (support frequent startup and shutdown).
6. Carbon reduction and cost reduction: Using a 37kW Leitz magnetic levitation blower in a project can save about 190000 kilowatt hours of electricity annually, save about 100000 yuan of electricity annually (recover the machine cost in one year), save about 23 tons of standard coal for power generation, and reduce about 172 tons of carbon emissions.
Application industry
Leitz magnetic suspension blower is widely used in sewage and wastewater treatment, raw material pressure transportation, food and drug treatment, metal treatment, thermal power generation, cement industry, chemical industry, semiconductor industry, brewing industry, biopharmaceutical industry, fermentation industry, paper industry, textile printing and dyeing industry, etc.
