Air occupies a certain space, but it has no fixed shape and volume. When pressure is applied to air in a closed container, the volume of air is compressed, increasing the internal pressure. When the external force is withdrawn, the air returns to its original volume under the internal pressure. If there is a movable object in the container, when the air returns to its original volume, the object will be pushed outward by the pressure of the air inside the container. This principle is widely used in production and life. For example: the ball into the compressed air, the more gas, the harder the ball; tires into the compressed air, the tires will be able to withstand a certain weight. In large automobiles, compressed air is used to switch the doors and brakes; water compressors use compressed air to pressurize water; in factories, compressed air is used to start the hammer to hit the iron; in coal mines, it can start the pickaxe to drill holes. It is also used for piping liquids and granular objects.
Compressed air is second only to electricity, the second largest power source of energy, but also has a variety of uses of the process air source, its application throughout the petroleum, chemical, metallurgy, electric power, machinery, light industry, textiles, automobile manufacturing, electronics,
Air compressor food, medicine, biochemical, national defense, scientific research and other industries and sectors.
Question 2: What are the uses of compressed air? Also say what is the principle? The first explanation ("compression" as a verb):
Compression of air, is to do work on the air. At this point, other forms of energy (such as kinetic energy, etc.) is converted to internal energy of the air, the air temperature increases, and if you put a ball of nitrocellulose cotton in the air, the cotton will burn
The second explanation ("compressed" as an adjective):
That is to say that the air is compressed. Compressed air is used for a variety of purposes. First of all, when we inflate the tires of a car, if the pressure is not high enough, the tires will not be filled, and the car will not run so comfortably. This is just one example.
In fact, compressed air has a wide range of industrial uses. For example, many machines such as air wrenches (such as mechanical wrenches used in automobile wheels) can quickly tighten or loosen the bolts, so they are widely used in mechanical assembly. In addition, the use of compressed air for cleaning, such as mechanical processing process, in the paw block on the wind, so that the workpiece in the process of placement, the following will not be padded chips, etc.. There are also many bearings for compressed air support. In short, compressed air applications in factories abound.
The following information from zhidao.baidu/question/4994575
Air occupies a certain space, but it does not have a fixed shape and volume. When pressure is applied to air in a closed container, the volume of the air is compressed, increasing the internal pressure. When the external force is withdrawn, the air returns to its original volume under the internal pressure. If there is a movable object in the container, the object will be pushed outward by the pressure of the air inside the container when the empty Christine returns to its original volume. This principle is widely used in production, life. For example: the ball into the compressed air, the more gas, the harder the ball; tires into the compressed air, tires can withstand a certain weight. In large automobiles, compressed air is used to switch the doors and brakes; water compressors use compressed air to pressurize water, in factories, compressed air is used to open the hammer to hit the iron; in coal mines, it can be opened to the wind pick drilling. Compressed air is also used for piping liquids and granular objects.
Compressed air is the second largest power energy after electricity, and is a process with a variety of uses of the gas source, its applications throughout the petroleum, chemical, metallurgy, electric power, machinery, light industry, textiles, automobile manufacturing, electronics, food, medicine, biochemistry, national defense, scientific research and other industries and sectors. Undesirable is the compressed air contains a considerable number of impurities, mainly: solid particles - in a typical big city environment per cubic meter of the atmosphere contains about 140 million particles, of which about 80% in the size of less than 2 μm, the air compressor suction filters are incapable of eliminating. In addition, the air compressor system will continue to produce internal abrasive debris, rust residue and oil carbide, they will accelerate the wear and tear of the air equipment, resulting in seal failure; water - the relative humidity in the atmosphere is generally as high as 65% or more, the compression of condensation, that is, it becomes wet saturated air, and entrained with a large number of liquid droplets of water, which is the root cause of corrosion of the equipment, piping and valves, and icing in the winter will also block the pneumatic system in the Small holes in the pneumatic system. It is worth noting that: even if it is separated from the net of pure saturated air, with the lowering of the temperature, there will still be condensate precipitation relief about every 10 ℃, its saturated water content will fall by 50%, that is, half of the water vapor into liquid water droplets (see Table 1). So in the compressed air system using multi-stage separation and filtration devices or compressed air pretreatment into a certain relative humidity in the dry air is very necessary; oil - high-speed, high-temperature operation of the compressor using lubricants can play a role in lubrication, sealing and cooling, but contaminated compressed air. The use of self-lubricating materials to develop less oil machine, semi-oil-free machine and oil-free machine although the compressed air to reduce the oil content, but also with the consequent reduction in the life of wearing parts, machine internal and piping system corrosion and air compressors in the break-in period, wear and tear and load reduction period of the rise in oil content and other side effects. This is undoubtedly a threat to the pursuit of high reliability of automated production lines. It should also be emphasized that the oil brought into the system is not beneficial under any circumstances. Because after many high-temperature oxidation and condensation emulsification, oil performance has been greatly reduced, and acidic, the subsequent equipment not only can not play a lubricating role, but will destroy the normal lubrication; microorganisms - in the pharmaceutical, bioengineering ...... >>
Question 3: What is called compressed air First of all, compressed air is produced by the compressor compression of the gas with a certain pressure, because the gas contains a large number of impurities, so it needs to be filtered, then you need to filter the filter. Do not understand can ask me
Question 4: What is compressed air to do the work Pneumatic is compressed air as a power source, driven machinery to complete the expansion or rotation action. Because it is the use of air has the characteristics of compression, inhalation of air compression storage, air will be like a spring with the elasticity, and then control its direction with the control element, driven by the executive element of the rotation and expansion. How much air from the atmosphere will be discharged into the atmosphere, will not produce any chemical reaction, and will not consume any components of the polluted air, in addition to the viscosity of the gas is smaller than the liquid, so that the flow rate is fast, so that the main feature is energy-saving and environmentally friendly.
Question 5: Introduction to compressed air systems Compressed air systems are systems in which air at atmospheric pressure is compressed and fed to a pneumatic system at a higher pressure.
Question 6: What is the purpose of compressed air for boilers? 5 points The compressed air used in large boilers have two major uses, one is to use compressed air to blow dust and maintenance when blowing pipe, as long as half of the air compressor can be. The second is used for instrumentation and pneumatic valves and other control systems, you need to use an oil-free air compressor to do.
Question 7: What is compressed air molding mold Injection molds are divided into: injection molds, blow molds, plastic molds, suction molds, molds, extrusion molds and so on. Compressed air molding mold is blow mold, is a total of more than one plastic mold in a structural form.
Question 8: Oxygen, compressed air is a kind of gas Oxygen, compressed air is a kind of gas
Oxygen is one of the components of air, colorless, odorless, tasteless. Oxygen is heavier than air, in standard conditions (0 ℃ and atmospheric pressure 101325 Pa) under the density of 1.429 g / liter, can be dissolved in water, but the solubility is very small.
At a pressure of 101kPa, oxygen turns into a light blue liquid at about -180 degrees Celsius and a snowy light blue solid at about -218 degrees Celsius.
Oxygen can combine directly with many elements to form oxides.
Oxygen is a gas necessary for combustion and plant and animal respiration. Oxygen-enriched air is used for medical treatment and high-altitude flights, pure oxygen is used for steelmaking and cutting and welding metals, and liquid oxygen is used as an oxidizing agent for rocket engines.
Oxygen used in production is obtained by fractionation of liquid air. Laboratory borrow oxygen salts (potassium chlorate, potassium permanganate, etc.) by thermal decomposition to produce oxygen.
Physical Properties:
① Color, taste, state: colorless and odorless gas (standard condition)
② Melting and boiling point:
③ Density: greater than the air
④ Water solubility: not easily soluble in water
⑤ Storage: azure cylinders
Chemical Properties:
A. Oxygen reacts with metals:
2Mg and Mg.
2Mg + O2 == 2MgO, burning violently emits a bright light, releasing a lot of heat, resulting in a white solid.
3Fe + 2O == 2Fe3O4, red-hot wire burns vigorously, sparks, emits a lot of heat, generating a black solid.
2Cu + O2 == 2CuO, heated bright red copper wire surface generated a layer of black material.