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August 3, 2020 - created by Bert linsheng, 2 likes, 0 followers, 1 member, 1 viewYou will find that from corner gas stations to large manufacturing plants, air compressors have been widely used in various occasions. Moreover, more and more air compressors are entering home... moreYou will find that from corner gas stations to large manufacturing plants, air compressors have been widely used in various occasions. Moreover, more and more air compressors are entering home workshops, basements and garages. Various models can now be purchased through local home centers, tool dealers and mail order catalogs. These models are sized to handle all kinds of tasks, from inflatable toys to nail guns, sanders, drills, impact wrenches, staplers and spray guns Wait for power tools.
The biggest advantage of pneumatics is that each tool does not need its own bulky motor. Instead, a single electric motor on the compressor converts electrical energy into kinetic energy. This allows light, compact, and easy-to-operate tools to run quietly with little wear on parts.
Although there are compressors that use rotating impellers to generate air pressure, positive displacement compressors are more common and include models used by homeowners, woodworkers, mechanics, and contractors. Here, the air pressure is increased by reducing the size of the space containing the air. Most compressors you will use use reciprocating pistons to accomplish this.
Like small internal combustion engines, conventional piston compressors have a crankshaft, connecting rods and pistons, cylinders and valve heads. The crankshaft is driven by an electric motor or a gas engine. Although some models only consist of a pump and an electric motor, most compressors have an air tank that can keep a certain amount of air within a preset pressure range. The compressed air in the air tank drives the pneumatic tool, and the motor will cycle on and off to automatically maintain the pressure in the air tank.
On the top of the cylinder, you will find a valve head with intake and exhaust valves. Both are simple thin metal discs-one on the bottom and one on the top of the valve plate. When the piston moves down, a vacuum is created above it. This allows outside air to push open the intake valve at atmospheric pressure and fill the area above the piston. When the piston moves upward, the air above it compresses, keeping the intake valve closed and pushing the exhaust valve open. The air moves from the outlet to the water tank. With each stroke, more air enters the tank and the pressure rises.
Typical compressors are available in 1-cylinder or 2-cylinder versions to suit the requirements of the tools they provide power. At the homeowner/contractor level, most 2-cylinder models operate in the same way as single-cylinder models, except that there are two strokes per revolution instead of one. Some commercial 2-cylinder compressors are 2-stage compressors, with one piston pumping air into the second cylinder, thereby further increasing the pressure.
When the tank pressure reaches a preset limit (approximately 125 psi for many single-stage models), the compressor uses a pressure switch to stop the motor. However, in most cases, you do not need that much pressure. Therefore, the air line will include a regulator that you can set to match the pressure requirements of the tool used. The pressure gauge before the pressure regulator monitors the tank pressure, and the pressure gauge after the pressure regulator monitors the air pressure. In addition, there is a safety valve on the water tank. If the pressure switch fails, the safety valve will open. The pressure switch can also be equipped with an unloading valve, which reduces the tank pressure when the compressor is turned off.
Compressor power
One of the factors used to specify compressor power is motor power. However, this is not the best indicator. You really need to know the amount of air the compressor can deliver at a certain pressure.
In cubic feet per minute (cfm), the rate at which the compressor can deliver a large amount of air. Since air pressure plays an important role in the speed at which air enters the cylinder, cfm will change as the air pressure changes. It also changes with the temperature and humidity of the air. In order to establish a level playing field, manufacturers calculate standard cubic feet per minute (scfm) with an air level of 68 degrees Fahrenheit and a relative humidity of 36% as cfm. For example, the Scfm rating is given at a specific pressure of 90 psi (3.0 scfm). If the pressure is reduced, the scfm will increase, and vice versa.
You may also encounter a level called "displacement cfm". This number is the product of the cylinder displacement and the motor speed. Compared with scfm, it provides an index of compressor pump efficiency.
The cfm and psi ratings are important because they represent the tools that a particular compressor can drive. When choosing a compressor, make sure it can provide the air volume and pressure required by the tool.
Linsheng Electrical Company mainly produces air compressors for automobiles. Is a professional of Air compressor Suppliers . Our air compressor has a built-in pressure gauge, which is compact and low... less
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