I would like to ask the master about the knowledge of air compressors

Air compressor refers to the compressor with compressed medium as air, which is widely used in chemical industry, petroleum, transportation, construction, navigation, mining and other fields, and the output accounts for more than 90% of the total output of compressors. There are many types of air compressors, ranging from air pumps for automobiles and tractors to large air compressors for mountain development and mining, with a value ranging from thousands of yuan to hundreds of thousands of yuan.

How to select and purchase air compressors not only involves how to use funds reasonably, but also has a direct relationship with the economy and reliability of normal operation in the future. This article introduces the common sense issues in this regard.

The general purpose air compressor is specified in the national standard, and the exhaust pressure is. If it is higher or lower than this pressure, it is a non-standard special air compressor.

There are mainly the following types of air compressors: according to the gas transmission volume (refers to the volume of gas discharged by each minute when the air compressor is working into the suction state), there are small machines (exhaust volume of less than 10 cubic meters), medium machines (displacement volume of 10 100 cubic meters or more), large machines (displacement volume of more than 100 cubic meters). (China Air Compressor Network.)

According to the structural type, there are rotary type, piston type and membrane air compressor. The common ones are piston type and rotary type, screw type, and sliding vane type. The rotor profile of the screw compressor is complex and the manufacturing cost is high, but its size is small, the weight is light, and the parts are small.

Screw compressors are much more expensive than piston compressors with the same air volume, and maintenance personnel must also have specialized knowledge and experience.

Exhaust volume is one of the main parameters of the air compressor, and the air volume of the air compressor should be matched with the required exhaust volume, and leave a margin of 10. If the air consumption is large and the exhaust volume of the air compressor is small, the air tool will be turned on, which will cause the exhaust pressure of the air compressor to be greatly reduced, and the air tool cannot be driven. Of course, it is also wrong to blindly pursue a large exhaust volume, because the larger the exhaust volume, the larger the motor equipped with the compressor, which is not only the highest level, but also a waste of purchase funds, and a waste of electricity energy when used.

In addition, it is necessary to consider the peak dosage, the usual dosage and the trough dosage when selecting the exhaust volume. If the trough consumption is large, and the usual consumption and peak consumption are not large, the usual foreign method is to obtain a larger exhaust volume of air compressors in parallel with a smaller exhaust volume, and start the machine one by one with the increase of gas consumption, which is not only good for the power grid, but also can save energy.

There are many industrial areas, but it is not necessary to go to all the factories.

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The amount of gas used by the gas equipment, the air pressure nameplate or the manual are indicated.

As long as the air compressor pressure is selected according to the pressure, you can know what kind of air compressor to use according to the sum of air consumption.

For example, three machines A use air pressure and air pressure. There is also c air pressure. Gas.

Then you can choose a machine with a pressure of more than 40 cubic meters, and you can also use more than a few cubic meters, and the gas volume can only be large and not small. However, it should be noted that too little pressure, too much pressure will cause damage to the courage equipment, but the pressure will be attenuated naturally or artificially. Got it?

There are two main parameters in the selection of air compressor: exhaust volume and exhaust pressure.

The exhaust volume is mainly based on the terminal gas consumption +20%. The exhaust pressure is 8 kg and 10 kg.

In addition, it is necessary to pay attention to the quality of the terminal gas to choose, such as oil-free, slightly oily, oily, etc.

The choice of air compressor is closely related to the power, working pressure and volumetric flow of the air compressor, if necessary.

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1. The maximum pressure value of the equipment + pressure loss is reserved.

2. If the two values are very different, you can choose a combination of multiple small machines, including one frequency conversion, which is relatively energy-saving and power-saving.

The exhaust volume of the air compressor should not be less than the air consumption of the gas equipment. You can also consider a backup machine for air compressors.

Overall gas consumption and maximum pressure.

It is required to integrate the air consumption of the company's equipment for 1min, and the air compressor can be used comprehensively.

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The functions of the air compressor are as follows:

1. Traditional aerodynamics: pneumatic tools, rock drills, air picks, pneumatic wrenches, pneumatic sandblasting 2, instrument control and automation devices, such as tool replacement of machining centers, etc. 3. Vehicle braking, opening and closing of doors and windows.

4. In the air-jet loom, the weft yarn is blown with compressed air to replace the shuttle 5. The food and pharmaceutical industries use compressed air to stir the slurry.

6. Starting of large marine diesel engines, wind tunnel experiments, underground passage ventilation, metal smelting 7, oil well fracturing.

8. High-pressure air blasting coal mining.

9. ** system, missile launch, torpedo launch.

10. Submarine sinking and floating, shipwreck salvage, submarine oil exploration, hovercraft 11, tire inflation.

12. Bottle blowing machine.

An air compressor is a device used to compress gas. An air compressor is similar to a water pump. Most air compressors are reciprocating piston type, rotating vanes or rotating screws. Centrifugal compressors are very large applications.

The air compressor is to provide air source power, is the core equipment of the pneumatic system, the main body of the electromechanical induced air source device, it is the device that converts the mechanical energy of the prime mover (usually the motor or diesel engine) into gas pressure energy, and is the air pressure generating device of compressed air.

The full name of air compressor is air compressor, which is the basic product of industrial modernization, and often says that electrical and automation have the meaning of full pneumatic; The air compressor is to provide air source power, is the core equipment of the pneumatic system electromechanical air source device in the main body, it is the original mover (usually the motor) of the mechanical energy into gas pressure energy of the device, is the compressed air pressure generation device.

The market size of China's air compressor industry is growing at a growth rate of more than 8%, and the growth rate in 2010-2011 even exceeded 28%, and the market scale is expanding rapidly. However, in such a large market, foreign companies have dominated the vast majority of the market for a long time. In 2009, there were nearly 400 production enterprises in China's air compressor industry, of which nearly 90% were domestic enterprises, and the total sales revenue was about 6 billion yuan, accounting for 40% of the whole industry; The number of foreign-funded enterprises is close to 10%, and the total sales revenue is about 9 billion yuan, accounting for 60% of the whole industry.

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

The uses of air compressors are as follows:

1. It can be used as aerodynamic force.

After compression, the air can be used as power, mechanical and pneumatic tools, as well as control instruments and automation devices, instrument control and automation devices, such as tool replacement in machining centers.

2. It can be used for gas transportation.

Air compressors are also used for gas pipeline transportation and bottling, such as remote gas and natural gas transportation, chlorine and carbon dioxide bottling, etc.

3. Used in gas synthesis and polymerization.

In the chemical industry, some gases are synthesized and polymerized by increasing the pressure of the compressor. For example, helium is synthesized from hydrogen, methanol is synthesized from hydrogen and carbon dioxide, urea is synthesized from carbon dioxide and ammonia, etc. Polyethylene is produced under high pressure.

Air compressor is the abbreviation of air compressor (English: air compressor) is the main body of the air source device, it is a device that converts the mechanical energy of the prime mover (usually the motor) into gas pressure energy, and is a pressure generating device for compressed air.

It is widely used in our daily life and production, so we can pay attention to it.

Air compressor is the abbreviation of air compressor. Air at normal atmospheric pressure is compressed to air at greater atmospheric pressure by physical compression. It is mainly used to provide terminal gas, pump tires, and provide power for pneumatic tool picks and pneumatic wrenches.

It is also used as a power source for automation equipment to drive pneumatic components.

Upstairs is very right, the air compressor is the abbreviation of the air compressor, as the name suggests, it is a kind of equipment for compressing air, the power of the commonly used air compressor will be different, but the basic air compressor is compressed to the maximum, that is, 8 kilograms, and then supply some pneumatic equipment, such as the air exhaust gun for decoration, the paint gun for painting, the cylinder used in the equipment, etc.

The English name of Koret Screw Type Air Compressor is [Koret Screw Type Air Compressor].

Advanced permanent magnet frequency conversion technology:

Through the frequency adjustment of the inverter, the speed of the motor is changed, so as to drive the speed change of the air end, and the gas production can be adjusted in a wide range between 40% and 100%, which fully adapts to the gas demand of users under different working conditions, improves gas efficiency and saves energy consumption. Because it can achieve smooth adjustment, it avoids frequent start and stop of the motor caused by demand changes, protects the motor and prolongs the service life of the unit.

The role of air compressor is very many, mainly used in medical treatment, factories, mines, tunnels, drilling and water intake, pipeline pressure testing, anti-corrosion and rust removal, etc. In the factory, the role of each factory is different, for example, the stamping plant will be used to drive the punch press, some are cleaning equipment, some are used to use pneumatic tools, blow glass bottles, and our beer is blown out by air compressor. Some also use air compressors for transportation, and I have seen some use air compressors to transport cement at the dock.

The uses of air compressors are quite numerous.

The uses of small air compressors are as follows:

1. Compressed air as power:

Drive all kinds of pneumatic machinery, the exhaust pressure of pneumatic tools is 7 8 kg square centimeter, used to control instruments and automation devices, the pressure is about 6 kg square centimeters, the vehicle is automatic, the doors and windows are opened and closed, the pressure is 2 4 kg square centimeters, agitation in the pharmaceutical industry, brewing industry. The sinking and floating of submarines, the firing and driving of torpedoes, and the salvage of wrecks are all powered by compressed air at different pressures.

2. Compressed gas is used for refrigeration and gas separation

The gas is compressed, cooled, expanded and liquefied for artificial refrigeration (refrigeration, air conditioning, etc.) such as ammonia or freon compressors. Its compression pressure is mostly 8 12 kg square centimeters, and this type of compressor is usually called a "chiller" or "ice machine". In addition to liquefied gas.

If the body is a mixture, each component can be separated separately in the separation device to obtain various gases for qualified lip reading. For example, pure oxygen, pure nitrogen, and pure xenon, krypton, argon, helium and other rare gases can be obtained after air liquefaction and separation.

3. Compressed gas is used for synthesis and polymerization.

In the chemical industry, gases are compressed to high pressures, which are often beneficial for synthesis and polymerization. For example, nitrogen and hydrogen to ammonia, hydrogen and carbon dioxide to methanol, carbon dioxide and ammonia to urea, etc.

In the chemical industry, for example, high-pressure polyethylene has a pressure of 1500 to 3200 kg square centimeter.

4. Gas Delivery:

1) The pressure of the compressor used to transport gas in the pipeline depends on the length of the pipeline. When sending remote gas, the pressure can reach 30 kg square centimeter. The bottling pressure for chlorine is 10 15 kg sq cm and the CO2 bottling pressure is 50 kg 60 sq cm.

2) In the chemical industry, gas compression to high pressure is often conducive to synthesis and polymerization. For example, nitrogen and hydrogen to ammonia, hydrogen and carbon dioxide to methanol, carbon dioxide and ammonia to urea, etc. In the chemical industry, for example, high-pressure polyethylene has a pressure of 1500 to 3200 kg square centimeter.

The reciprocating piston air compressor generally rotates by the motor through the V-belt to drive the shaft, and then drives the piston through the connecting rod to produce reciprocating motion, so that the volume of the piston cavity composed of air valve, piston and cylinder changes, so as to achieve the purpose of compressing air. The compressed air is then compressed through an intercooler and finally enters the air storage tank.

The air storage tank is mainly composed of a cylinder, a pressure gauge, a safety valve, etc., which can stabilize the pressure of the air pipeline and reduce the pressure fluctuation caused by the compressor when it is working. If for some reason the compressed air inside exceeds the rated air pressure, the safety valve will automatically open to discharge the compressed air into the atmosphere to ensure safe operation. Our factory uses the type and type air compressor produced by Fujian Compressor General Factory, and the opening pressure of the safety valve is times the rated discharge pressure.

Of course, the opening pressure of the safety valve is different for different specifications of air compressors.

Screw air compressor.

A pair of mutually meshing rotors rotate at high speed to compress the inhaled air and oil mist and discharge them.

Air compressor simply put, it is to compress the air as a power cleaning and so on, the structure is different according to various principles, mainly to see what to do to reasonably match different principles of different air compressors.