Air Compressor Introduction

The air compressor (air compressor) is the main body of an air source device. It is a device that converts mechanical energy of a prime mover (usually a motor) into gas pressure energy, and is an air pressure generating device for compressed air.

Features The motor directly drives the compressor, causing the crankshaft to produce a rotating motion, driving the connecting rod to cause the piston to reciprocate, causing a change in cylinder volume. Due to the change of the pressure in the cylinder, the air is passed through the air filter (muffler) through the intake valve into the cylinder. During the compression stroke, due to the reduction of the cylinder volume, the compressed air passes through the exhaust valve and passes through the exhaust pipe. The valve (check valve) enters the gas tank. When the discharge pressure reaches the rated pressure of 0.7MPa, it is automatically stopped by the pressure switch. When the pressure of the gas tank drops to 0.5--0.6MPa, the pressure switch is automatically connected and started.

Uses 1. Traditional aerodynamics: pneumatic tools, rock drills, pneumatic picks, pneumatic wrenches, pneumatic sand blasting, instrument control, and automation devices such as tool change in machining centers. 3. Vehicle braking, opening and closing doors and windows, 4 jets The loom blows the weft with compressed air in place of the shuttle 5, the foodstuff, and the pharmaceutical industry, uses compressed air to agitate the slurry, 6 starts the large-scale marine diesel engine 7, wind tunnel experiment, underground tunnel ventilation, metal smelting 8, oil well fracturing 9, High-pressure air blasting coal mining 10, weapon systems, missile launches, torpedo launches 11, submarine ups and downs, wreck salvage, submarine oil exploration, hovercraft 12, tire inflation 13, spray paint,

14, blowing machine 15, air separation industry classified air compressor of many types, according to the principle of work can be divided into positive displacement compressors, speed compressors, positive displacement compressor's working principle is the volume of compressed gas, the unit The density of gas molecules in the volume increases to increase the pressure of the compressed air. The working principle of the speed compressor is to increase the movement speed of the gas molecules and convert the kinetic energy of the gas molecules into the pressure energy of the gas, thereby increasing the pressure of the compressed air.

The commonly used air compressors are piston air compressors, screw air compressors (screw air compressors are divided into twin-screw air compressors and single-screw air compressors), centrifugal compressors, and vane-type air compressors. Machine, scroll type air compressor. The following is the definition of various compressors. Compressors such as cams, diaphragms, and diffusion pumps are not included because of their special purpose and relatively small size.

Positive displacement compressors - Compressors that directly rely on changing the volume of gas to increase gas pressure.

Reciprocating compressor - is a positive displacement compressor, the compression element is a piston, reciprocating in the cylinder.

Rotary compressor - is a positive displacement compressor, compression is achieved by the forced movement of the rotating element.

Slide vane compressor - is a rotary variable-capacity compressor, its axial slide in the same cylinder cylinder eccentric radial sliding. The air trapped between the slides is compressed and discharged.

Liquid-piston compressors are rotary positive displacement compressors in which water or other liquid acts as a piston to compress gas and then discharge the gas.

Roots dual-rotor compressor - is a rotary positive displacement compressor, in which two Roots rotors mesh with each other to intercept the gas and send it from the air inlet to the exhaust port. No internal compression.

Screw compressors - are rotary positive displacement compressors in which two rotors with helical gears mesh with each other to compress and discharge the gas.

Speed ​​compressor - is a rotary continuous air compressor, in which high-speed rotating blades accelerate the gas passing through it, which converts speed energy into pressure. This conversion takes place on the rotating blades and partly on a fixed diffuser or return baffle.

Centrifugal Compressor - A speed-type compressor in which one or more rotating impellers (the blades are usually on the side) accelerate the gas. The main air flow is radial.

Axial compressors - are speed-type compressors in which gas is accelerated by a bladed rotor. The main airstream is axial.

Hybrid-flow compressors, also known as speed-type compressors, have rotors that combine the characteristics of both centrifugal and axial flow.

Jet Compressor - Takes in the inhaled gas with a high-velocity gas or steam jet and then converts the velocity of the gas mixture to pressure on the diffuser.