An air compressor is a device that compresses gas. Air compressors are similar in construction to water pumps. Most air compressors are reciprocating pistons, rotating blades or rotating screws. Centrifugal compressors are very large applications.
There are many types of air compressors (air compressors). 1. According to the working principle, it can be divided into three categories: volumetric, dynamic (speed or turbine), and thermal compressors. 2. According to the lubrication method, it can be divided into oil-free air compressor and oil-lubricated air compressor. 3, according to performance can be divided into: low noise, variable frequency, explosion-proof air compressors. 4. It can be divided into refrigerator compressors, air-conditioning compressors, refrigeration compressors, oilfield compressors, natural gas filling stations, rock drills, pneumatic tools, vehicle brakes, door and window opening and closing, and textile machinery according to the purpose Use, tire inflation, plastic machinery compressors, mining compressors, marine compressors, medical compressors, sandblasting and painting. 5, according to the type can be divided into: fixed, mobile, closed. Positive displacement compressor-a compressor that directly relies on changing the gas volume to increase gas pressure. Piston compressor-is a positive displacement compressor, the compression element is a piston, which reciprocates in the cylinder. Rotary compressor-is a positive displacement compressor, compression is achieved by the forced movement of rotating elements. Sliding vane compressor-is a rotary variable capacity compressor. Its axial sliding vane slides radially on a rotor eccentric to the cylindrical cylinder. The air trapped between the slides is compressed and discharged. Liquid-piston compressor-is a rotary positive displacement compressor in which water or other liquid is used as a piston to compress the gas and then discharge the gas. Roots dual-rotor compressors are rotary positive displacement compressors in which two Roots rotors mesh with each other to intercept the gas and send it from the inlet to the exhaust. Speed type compressor-is a rotary continuous air compressor, in which high-speed rotating blades accelerate the gas passing through it, thereby converting speed energy into pressure. This conversion occurs partly on the rotating blades and partly on a fixed diffuser or return-flow baffle. Centrifugal compressor-is 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 the gas is accelerated by a bladed rotor. The main air flow is axial. Mixed flow compressors-also speed type compressors. The shape of its rotor combines some features of both centrifugal and axial flow. Jet Compressor—Using high-speed gas or steam jets to take in the gas, and then convert the speed of the mixed gas into pressure on the diffuser. Permanent magnet variable frequency compressor——Because the variable frequency screw air compressor uses the stepless speed regulation of the frequency converter, it can start smoothly through the controller or the PID regulator inside the frequency converter. , And can quickly adjust the response. Unipolar compression screw air compressor-The head is a screw air compressor composed of a pair of yin and yang rotors. This model is a widely used screw air compressor. Bipolar Compression Screw Air Compressor-The head is composed of two pairs of yin and yang rotors. After the first stage compression, the gas enters the second stage compression. The compression ratio is high and the power is reduced by one gear compared with the first stage compression air compressor. . Bipolar permanent magnet variable frequency air compressor-a new energy-saving product developed since 2014, combining permanent magnet variable frequency and bipolar compression technology, has high energy saving efficiency.
The compressor is directly driven by the motor, which causes the crankshaft to rotate, and the connecting rod causes the piston to reciprocate, causing the cylinder volume to change. Due to the pressure change in the cylinder, the air is passed through the air cleaner (muffler) into the cylinder through the intake valve. 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 check valve (check valve) enters the gas storage tank. When the exhaust pressure reaches the rated pressure of 0.7 MPa, it is automatically stopped by the pressure switch. When the pressure of the gas storage tank drops to 0.5–0.6MPa, the pressure switch is automatically connected and started.
The air compressor is to provide air source power and is the core equipment of the pneumatic system. The main body of the electromechanical air induction device is a device that converts the mechanical energy of the prime mover (usually an electric motor or diesel engine) into gas pressure energy. Air pressure generating device.
a. Traditional aerodynamics: pneumatic tools, rock drills, pneumatic picks, pneumatic wrenches, pneumatic sandblasting b. Instrument control and automation devices, such as tool change in machining centers. c. Vehicle braking, doors and windows opening and closing d. Use compressed air to blow the weft yarn in the air-jet loom to replace the shuttle e, food, pharmaceutical industry, using compressed air to stir the slurry f. Starting of large marine diesel engines g, wind tunnel experiment, ventilation of underground passage, metal smelting h. Oil well fracturing i. High pressure air blasting coal mining j, weapon system, missile launch, torpedo launch k. Submarine sinking and floating, shipwreck salvaging, submarine oil exploration, hovercraft l, tire inflation m, spray paint n 、 Blow molding machine o 、 Air separation industry p. Industrial control power (driving cylinder, pneumatic component) q 、 Producing high pressure air for cooling and drying of processed parts.