Inverter air compressors are the future of the air compressor industry. In the future, air compressors will definitely use frequency converters a lot. If you are the right buyer of air compressors, it is best to choose inverter air compressors of the same power. I have to ask, is it possible to add a frequency converter to a general screw air compressor?
Under normal circumstances, the installation of frequency converters in general screw air compressors will have the following disadvantages:
Is it okay to add a frequency converter to the screw air compressor?
Generally, the screw air compressor uses a power frequency motor, and the frequency adjustment scale after installing the inverter is only 25~50Hz, which cannot play the role of energy saving at all, and can only achieve the function of soft start. However, in actual use, the motor is often burned due to the decrease in the speed of the motor, resulting in a great loss of heat dissipation.
Generally speaking, the set fuel injection amount of the screw air compressor main engine is stable with the entire oil amount. It will not automatically reduce the fuel injection amount in time due to the decrease in the screw speed and the temperature of the host machine. Continue the fuel injection of the full amount of oil, which may cause serious problems. The emulsification phenomenon occurs, resulting in water in the system, which greatly damages the bearing and the main engine, and greatly shortens the service life of equipment components and the whole machine.
General screw air compressors inevitably have air leakage in the triangle leakage area, especially the linear screw of general screw air compressors that are designed to operate at full load. When the speed is forcibly reduced, the leakage in the triangle area is extremely enlarged. It is easy to cause the phenomenon of airflow back-channeling and cause airflow disorder, which greatly reduces the gas production and increases the turbulence rate of the main engine, which increases the failure rate of the main engine and affects the life of the bearing and the main engine.
Fourth, the general screw air compressor usually uses the PID closed-loop program-controlled control system. The installed inverter control system and the pressure signal sensor of the machine cannot achieve better synchronization matching, which will cause the signal transmission during operation to be dull and disorderly. A series of phenomena, such as frequent occurrences, increases the equipment failure rate. Generally, screw air compressor manufacturers do not support the installation of external frequency converters.The installation of a frequency converter is generally only suitable for the transformation of single-unit compressor air compressors, and it is especially not suitable for double-stage compression. Because two-stage compressors are driven by a small power motor through large and small gears to drive the two main engines to overload operation, frequency conversion transformation After that, it is more likely to cause the phenomenon of burning the motor and will greatly reduce the transmission power.
