A rotary screw compressor is one of the more common compressors that are used for large industrial projects. It is a gas compressor, utilizing what is called a positive displacement mechanism, typically used to replace piston compressors. If a large amount of high-pressure air is needed for a job, for example operating a jackhammer, these are the compressors that are used because of how efficient they are at generating high pressure on the fly. Here is an overview of how the rotary screw compressor works, and the different types that are available.
How Do They Work?
These copeland semi hermetic compressors are the results of helical screws, ones that mesh together into what are called rotors. Working together, they are able to compress a significant amount of air, and come in either dry running or oil flooded compressor styles. They are very effective and are actually not that large. They tend to be very compact. They do not require a suspension spring and are mounted on rubber vibration insulating platforms so that they can absorb high frequencies of vibration. Referencing again the jackhammer, this is one of the reasons that it is so loud. It’s not just the impact against the asphalt, but the power behind these Rotary screw compressors, with pumping speeds of up to 10 cubic ft per minute.
One of the more popular ones is the oil free compressor, one that operates almost entirely through the spinning of the screws. It does not need oil, but as a result of that, they typically have a lower maximal discharge. The oil-injected compressors provide cooling and are able to deliver quite a bit more pressure. There are receiver tanks that are used to contain the compressed air, and the oil is cooled and filtered throughout the entire process.
Different Control Schemes Rotary Screw Compressors
There are five different control schemes that you will often find with these devices. There is the start and stop scheme, the load and unload scheme, and one that uses modulation. There are also variable schemes including variable displacement and variable speed drives, the latter of which offers a very low operating costs.
Advantages Of The Rotary Screw Compressor
There are a couple advantages to using this particular compressor over the many others that are available. Specifically, the twin screw supercharger is one of the most efficient, one that is used in high precision manufacturing companies, particularly those that are computer-controlled. They are cooled on the inside, reducing the overall heat that is produced which can be quite significant. There may also be blowers involved, allowing for additional airflow, one that is common with the two-stroke diesel engine.
This brief overview of what a rotary screw compressor actually is should give you a few ideas on why you may need to use one. If you are in any industry that requires a significant amount of air pressure for the devices that you use, this would be at the top of your list. You can find more information on these compressors, and great deals if you need to buy one soon. They will definitely help you run your business more efficiently, especially if you are operating power tools were devices that require high amounts of air pressure to use them.