DR two-stage compression permanent magnet variable frequency air compressor
The two-stage compression reduces the pressure ratio of each stage, greatly reducing the sealing leakage between the rotors and improving the volumetric efficiency of the machine head;
Compared with single stage compression, two-stage compression air compressors use oil injection to cool the high-temperature air after the first stage compression, and the air is compressed at equal pressure, thereby reducing the suction temperature of the second stage. The entire compression process approaches isothermal compression, reducing compression power consumption;
With the same power air compressor, compared to single stage compression, two-stage compression can theoretically increase the exhaust volume by up to 8-15%, saving 8-15% of energy consumption. When operating continuously at full load for a long time, the efficiency cost ratio is good;
In addition to energy conservation, two-stage compression also has stable and reliable characteristics. By using two-stage compression, the service pressure is achieved, and the pressure ratio of each stage is small, which means that the pressure difference between the inlet and outlet of each stage rotor is small, the main components are under small force, and the thermal load is low. At the same time, it can also reduce the load on the bearings, extend the service life of the host, and ensure the effective and reliable operation of the entire machine.
DaVos dedicated two-stage compression host
The special main engine of Dawos is adopted, with unique main engine design. The primary compression unit and the secondary compression unit are integrated in one machine body. Through gear drive, the rotor of each compression unit can obtain good linear speed. DaVos dedicated two-stage compression host
The rotor profile reduces the leakage area and improves compression efficiency.
Between the first and second stage compression chambers, injection cooling is introduced to replace the intercooler, significantly reducing the loss of compressed air. At the same time, the dew point temperature of compressed air is controlled to prevent liquid water from entering the second stage host and causing corrosion, while also preventing oil emulsification.
Both the primary and secondary engines have introduced a partial axial intake design, fully utilizing the effective length of the screw, resulting in better compression efficiency; Reduce radial imbalance force and improve component life; It also significantly reduces operating noise.
Centrifugal cooling and ventilation design
Using a centrifugal fan, the cooling method has been changed from forced exhaust cooling to suction cooling, significantly reducing operating noise. Centrifugal cooling and ventilation design
The heavyweight heat exchanger has a large heat exchange area, and the cooler directly sucks in cooler air from outside the unit, achieving cooling of oil and air, and forcibly expels hot air directly from the top of the unit, resulting in better cooling effect.
The suction hole of the centrifugal fan located inside the machine body directly discharges the hot air, so that the internal temperature of the air compressor is always kept low.
When cleaning the air-cooled cooler, there is no need to disassemble the air guide cover, just remove the cover plate to complete.
electric machinery
1、Hybrid Permanent Magnet (HPM.) Motor
The stator coil and permanent magnet rotor of a hybrid permanent magnet motor generate strong electromagnetic force, driving the motor shaft to rotate at different speeds. The motor shaft directly drives the directly connected male rotor of the main engine, without efficiency loss of the intermediate transmission part, and frequency conversion speed regulation is energy-saving;
Eliminated the use of worn parts and motor bearings in the motor, without gears/bearings/shaft seals, etc;
The volume is 1/3 of that of a regular motor, which can be maintained on-site and one of the winding coils can be replaced;
It can start/stop infinitely, saving 30% of energy waste caused by traditional air compressors due to unloading;
Soft start, starting current less than 1 time the rated current, ordinary air compressor Y - △ start, 3-5 times the rated current, more energy consumption;
The increase in motor air gap can enable the HPM motor to operate normally at an ambient temperature of 46 degrees Celsius, eliminating the hassle of shutdown. And the service coefficient of the HPM standard motor is 1.25, greatly extending the service life of the motor.
Up to 96% continuous operational efficiency.
2. Microcomputer synchronous control system
Core Technology: Microprocessor Synchronously Control system
The advanced microcomputer control drive system helps Lasting achieve intelligent control, variable speed control, automatic air volume adjustment, load start, soft start, elimination of current surge, and extension of component service life, greatly increasing the reliability of the system.
3、Air Conditioner
LASTING oil-free screw air compressor uses pre cooled hot air to protect the cooler from thermal load damage, and the design of the pre cooler adopts a multi-core structure. The three tube parallel pre cooler of the cooling air regulator greatly reduces the exhaust temperature of the second stage compression chamber, with a value of approximately 30 ° F (17 ° C).
The air-cooled LASTING oil-free screw air compressor also ensures the stability of CTD by adjusting the flow rate of the variable frequency centrifugal fan, while achieving energy-saving and noise reduction effects.
Technical parameters:
