[Chinese Packaging Network News] As we all know, there are many types of air compressors, which can be roughly divided into piston air compressors, rotary vane air compressors, centrifugal air compressors, screw air compressors, and reciprocating air compressors. Screw air compressor. The following is the working principle of various types of air compressors.
(The picture above shows the Shanghai Payne piston air compressor)
Piston air compressor
The piston-type air compressor gasoline engine type motor is bolted to the base, and the base is fixed with the anchor bolt. During operation, the motor drives the crankshaft directly through the coupling and drives the connecting rod, crosshead and piston rod, so that the piston reciprocates in the cylinder of the compressor and completes the processes of suction, compression, and discharge. The machine is a double-acting compressor, that is, the air is sucked in, compressed and discharged by the piston moving up and down. When the piston moves from the side axis of the cover, the cylinder volume increases, the pressure in the cylinder is lower than the atmospheric pressure, the outside air passes through the filter, and the suction valve enters the cylinder; after reaching bottom dead center, the piston moves from the shaft to the cover side When the suction valve is closed, the cylinder volume gradually becomes smaller, the air in the cylinder is compressed, and the pressure rises. When the pressure reaches a certain value, the exhaust valve is opened and the compressed air enters the gas storage tank via the pipeline. Work on the ground and continuously send compressed air into the air tank to gradually increase the pressure in the tank and obtain the required compressed air.
2. Rotary air compressor
Rotary vane compressors Each type of compressor has different lubricant requirements. The lubricating oil function of a rotary vane compressor is to lubricate the blades that slide in and out during compression. Lubricating oil is also used as a sealant between the blade and the frame to enable gas compression. ISO68-150 products usually meet the viscosity requirements of rotary vane compressors.
3. Centrifugal air compressor
Centrifugal air compressor works on the principle that the gas enters the impeller of the centrifugal compressor. Under the action of the impeller blades, it follows the impeller for high-speed rotation while flowing under the effect of rotating centrifugal force to the impeller outlet and is expanded by the impeller. Pressure, its pressure energy and kinetic energy are improved, the gas into the diffuser, the kinetic energy is further converted into pressure energy, the gas and then through the curve, the return flow into the next stage impeller further compression, so that the gas pressure to the process Required requirements.
Screw air compressor
The main components of screw air compressors are screw heads and oil and gas separation barrels. The screw type single-stage compression air compressor is a pair of parallel-toothed yin and yang rotors (or screws) rotating in the cylinder, so that the air between the rotor slots continuously produces periodic volume changes, while the air follows The rotor axis is transported from the suction side to the output side to achieve the entire process of suction, compression and exhaust of the screw air compressor. The air inlet and the air outlet of the air compressor are respectively located at two ends of the casing. The slots of the female rotor and the teeth of the male rotor are driven and rotated by the main motor. The compressor is directly driven by the motor, so that the crankshaft generates a rotating motion, and the connecting rod is driven to cause the piston to reciprocate, causing the volume of the cylinder to change. 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 air tank and is automatically stopped by the pressure switch when the discharge pressure reaches the rated pressure.
5. Reciprocating air compressor
Reciprocating air compressor oil-lubricated cylinders, crankcase parts, coils, pistons, valves and packing rods. The crankcase components include crosshead bearings, crosses, crosshead guides, and crank pins. In most reciprocating compressors, a fluid is used as a lubricant for all components. Smaller reciprocating compressors use splash oil. Larger devices typically use an oil pump system to lubricate the upper crankcase components. Air compressors Some large machines use two different lubricants, one for cylinders and the other for other components that require lubrication. Since the cylinder lubricant must coexist with the gas, it must be compatible with the downflow process. Cylinder lubricants can be designed to provide lubrication for specific gases or operating conditions.
6. Screw air compressor
Helical compressor air compressors have many advantages including improved compression efficiency, low outflow temperature, high reliability, and less maintenance due to simple mechanical construction. Screw gas compressors must have several functions. They lubricate the bearings, provide a sufficient seal between the screw and the frame, remove the heat from the compression process, wash away any particles in the compressor, and protect the system from corrosion. Compressors Due to the closed-loop design of the system, synthetic products are particularly suitable for screw compressors. Lubricating oil and compressed gas enter the separator. The separated oil passes through an oil cooler and returns to the compressor. The degradation of the lubricating oil in this process can lead to compressor problems such as bearing failure, insufficient sealing or corrosion. In many applications, the use of synthetic compressor lubricants can result in effective hydrocarbon compression and production gases.