Overview of Air Compressors
Air Compressor (English: Air Compressor), which is the main body of the air source device, belongs to general machinery. It is a device that converts the mechanical energy of the motor into pressure energy or kinetic energy. It is used to increase the pressure of air. generating device.
According to the purpose, it is generally divided into power gas source and process gas source.
Power air source: Compressed air is used to drive other power machinery.
Process gas source: Compressed gas that becomes an integral part of the final product.
Classification of Air Compressors
1. Positive displacement compressor
The working principle of the positive displacement compressor is to compress the volume of the gas, confine a certain amount of continuous airflow in a closed space, and through some mechanical movement, the volume of the gas is reduced and the density is increased to increase the pressure of the compressed air.
Positive displacement compressors are divided into reciprocating compressors and rotary compressors.
1) Reciprocating compressor
Reciprocating compressors are divided into piston compressors and diaphragm compressors.
A. Piston compressor. It is a common type of reciprocating compressor. Through the movement of the piston, the compressed gas is sealed by the piston ring.
Iwata oil-free piston Air Compressor
B. Diaphragm compressor. It is a kind of reciprocating compressor. The difference from the piston machine is that the piston does not directly contact the compressed gas, and the compressed gas is compressed by diaphragm extrusion.
2) Rotary compressor
Rotary compressors are divided into screw compressors and vane compressors.
A. Screw compressor. It is a kind of rotary compressor, and a certain volume is formed between the screws and between the screw and the casing. With the rotation of the screw, the volume between the screw and the casing gradually decreases, so as to achieve the purpose of compressing air.
Screw Air Compressor
B. Sliding vane compressor. It belongs to the rotary variable capacity compressor. Through the radial movement of the sliding vanes on the eccentric rotor, the air between the two sliding vanes is gradually squeezed and then discharged to achieve the purpose of compressing air.
Scroll Air Compressor
2. Dynamic compressor
The working principle of the dynamic compressor is to increase the movement speed of gas molecules, and then through a certain diffuser, the kinetic energy of the gas molecules is converted into the pressure energy of the gas, thereby increasing the pressure of the compressed air.
According to the direction of air flow, dynamic compressors can be divided into centrifugal compressors and axial compressors.
1) Centrifugal compressor
The centrifugal compressor is a speed type compressor. Its working principle is to increase the movement speed of gas molecules, and then convert the kinetic energy of gas molecules into the pressure energy of gas through a diffuser, thereby increasing the pressure of compressed air.
2) The axial flow compressor is a dynamic compressor, and the gas is accelerated by the rotor equipped with blades. The direction of its airflow is axial.
