ZAKF
magnetic levitation blower, as a high-end model in the field of air compressor, its core technology integrates fluid dynamics, electromagnetic technology and intelligent control, which differentiates it from the traditional
Screw Air Compressor, as follows:
Magnetic Levitation Bearing Technology
By replacing the mechanical bearings (such as rolling bearings or sliding bearings) commonly used in screw air compressors with magnetic force, it realizes contactless levitation of the rotor. When the rotor is shifted due to external interference, the sensor detects the displacement in real time and transmits it to the controller, which generates electromagnetic force through electromagnet to counteract the external force, and the axis shift can be precisely controlled within 1μm. This technology does not require lubrication system, and the vibration amount is extremely small, compared with screw air compressor, it is more suitable for the scenarios that require high cleanliness and low noise (such as wastewater treatment, air compression system of electronic industry).
High-speed permanent magnet motor technology
Permanent magnets are installed in the main shaft of the motor, and the stator winding is fed with three-phase current to form a rotating magnetic field, which drives the rotor to synchronous high-speed operation (the speed can reach tens of thousands of revolutions per minute), and it can be directly connected to the impeller, thus eliminating the gear booster box necessary for screw air compressors, and increasing the transmission efficiency to more than 97%. Compared with the asynchronous motor + gear drive of
Screw Compressor, the energy consumption of permanent magnet motor is reduced by 10%-15%, which is especially suitable for continuous high load air compression conditions.
Ternary flow impeller technology
adopts full ternary flow backward curved design, the impeller is made of high-strength aluminum/titanium alloy, milled by 5-axis machining center, with variable efficiency up to 98%, and the range of working conditions is wider than that of screw air compressor (the efficiency of screw compressor is usually optimal in a specific speed range). The impeller needs to pass CAE fluid analysis, 100% radiation flaw detection and 115% over speed test to ensure reliability under high speed operation, which is suitable for high flow rate, medium and high pressure air compression scenarios (e.g. air separation device, powder conveying system).
Intelligent control and high-efficiency inverter technology
is equipped with DSP-based control system and high-efficiency inverter, which can adjust the motor speed in real time (similar to the inverter adjustment of the screw air compressor, but with faster response speed), and support the modes of constant pressure and constant flow. Through the IoT platform docking air compressor centralized monitoring system, it can be linked with screw air compressor and other equipment scheduling - for example, in the factory compressed air station, the magnetic levitation blower bears the high-flow baseload load, and the screw machine as a peak-regulating equipment supplement to optimize the overall energy efficiency.
Technical characteristics and market positioning of screw air compressor
As the mainstream model of traditional air compressor, screw air compressor's technology is complementary to ZAKF magnetic levitation blower:
Twin-screw rotor technology
The rotor is rotated by the mesh of the male rotor (convex teeth) and the female rotor (concave teeth), and compresses the air through the change of the volume between the teeth, and the rotor profiles (such as asymmetric tooth shape and multiple threads) are the core patents, which directly affect the compression efficiency and the market positioning. The rotor profile (e.g. symmetrical tooth shape, multiple threads) is the core patent, which directly affects the compression efficiency and noise level. Compared with the magnetic levitation blower, the screw air compressor is more suitable for small and medium flow rate, medium and low pressure scenarios (such as factory floor air supply, spraying operations), and better adaptability to working conditions (such as oily environments, fluctuating loads).
Volumetric Compression Principle
Relying on the volume change of rotor engagement to realize compression, unlike the power compression of magnetic levitation blower (relying on the impeller kinetic energy to pressure energy), screw air compressor has higher flow stability during pressure fluctuation, suitable for scenarios that require high stability of air pressure (such as pneumatic tools, food packaging air compression).
Oil Lubrication and Cooling System
Most screw air compressors rely on lubricant to participate in the compression process, playing a sealing, cooling, lubrication, and need to be matched with components such as oil separators, coolers, etc. (while the magnetic levitation blower is an oil-free design). Some high-end screw air compressor manufacturers have introduced “oil-free” models (e.g. water-injected screw machines), which are mainly used in clean areas such as pharmaceuticals and foodstuffs, but at a higher cost.
Third, the air compressor manufacturers technology layout and competitive landscape
In the air compressor market, different manufacturers focus on the technical routes of magnetic levitation blowers and screw machines:
Specialized magnetic levitation blower manufacturers focus on magnetic levitation bearing and high-speed motor technology, leading energy efficiency, and focusing on large-scale energy-saving renovation projects (e.g., sewage treatment plants, power plants).
Traditional screw machine leading manufacturers screw rotor line technology is mature, the product line covers the full flow range, supporting service network is perfect, occupy the mainstream share of the industrial market.
Comprehensive compressor enterprises at the same time layout of magnetic levitation and screw technology, to provide systematic compressed air solutions to meet different customer needs.
Fourth, the trend of technological integration and manufacturers' strategy
In recent years, the air compressor industry presents the trend of technological integration:
Magnetic levitation blower manufacturers gradually penetrate the traditional screw air compressor market by optimizing the control algorithm and improving the efficiency of small flow conditions;
Screw air compressor manufacturers develop oil-free models with high-speed inverter technology to compete with maglev blowers in the mid-range market;
Some manufacturers have launched “Maglev + Screw” combination programs, such as large compressed air stations using Maglev blowers to bear the baseload, screw machines are responsible for peaking, to achieve the full working conditions of high-efficiency operation.
When choosing equipment, users need to combine the flow demand (
maglev blowers are suitable for large flow, screw machines are suitable for small and medium flow), pressure range (the former is medium and high pressure, the latter is medium and low pressure), energy-efficiency requirements and the initial investment in a comprehensive manner. zakf and other manufacturers of technological innovation is promoting the
air compressor industry to the direction of high efficiency, intelligent development.
