Screw compressors, unlike piston compressors, do not have any valves or other mechanical forces that could cause unbalance. This allows a screw compressor to run at high speeds while delivering a high flow rate in a small package. Continuous, workplace and industrial applications are ideal for rotary air compressors. Oil-free and oil-injected versions are available, with the option of fixed or variable speed drive operation.
The energy efficiency of rotary screw compressors is their main advantage. However, there are numerous advantages to using this type of compressor. These are some of them:
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output with low noise
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no duty cycle continuous operation at temperatures up to 46 degrees C small footprint for point-of-use installations
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In oil-lubricated machines, low oil carryover (as low as 3 ppm) is possible.
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Over time, there is no capacity loss.
With "full-feature" variants, the installation footprint can be even smaller. These machines have a built-in refrigerant dryer (dewpoint at +4°C compressor output).
The 2.2-500 kW range of workplace and industrial rotary screw compressors offers a wide range of options. Advanced designs, such as a vertical, close-coupled configuration, have recently been introduced. Interior permanent magnet motor drive and inverter systems are another distinguishing feature. Energy savings of up to 50% are possible with these systems when compared to fixed-speed designs.
What is a screw compressor and how does it work?
We'll take a closer look at twin screw air compressor technology in this article. What exactly is a screw compressor, and how does it work?
The screw element technology, also known as a twin screw compressor, is a form of rotating displacement compressor that was invented in the 1930s. A male and female rotor element, operated either by the male rotor or by a timing gear, is the key feature:
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The male rotor powers the female rotor in oil-injected screw compressor technology.
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A timing gear drives both rotors for harmonic running in oil-free compressor technology, with the minimum determined clearance between both parts.
A screw compressor's basic principle is that the male and female rotors rotate in opposite directions. Air is drawn in between them as a result of this. As air moves with the rotors, the gap between the rotors and their housing shrinks, causing air compression.
After that, the pressurised air is pushed out the exit. Rotary screw compressors are more sophisticated than piston compressors, despite the fact that they belong to the same class. As a result, the screw rotors' speed is tuned to a certain extent. This is meant to prevent mechanical losses (because to high-speed heat) and volumetric losses (due to low-speed air losses) during compression.
What types of rotary screw compressors are there?
Oil-lubricated screw compressors
This variant is also sometimes called an oil-flooded compressor or an oil-injected compressor. The technical name, however, is oil-lubricated.
Rotary screw compressors with oil lubrication inject oil into the compression chamber. The compressor element is cooled and lubricated with this oil. It also aids in the removal of heat from the compression process as well as the reduction of leaks in the compression chamber. Oil-injected compressors, the next step up from piston technology, have as many applications as there are industries. Users that require huge amounts of medium-pressure air typically use this type of compressor.
The lack of a duty cycle is one of the primary selling features for users. An oil-injected rotary screw compressor could run for the entire working day without causing any problems. In reality, it would be advantageous. This is especially critical in manufacturing, where a malfunctioning compressor can halt output.
It can also be used in situations where air demand is difficult to foresee or where trying to manage it is undesirable. Would you like your compressor to make the decision on when you can work?
Call All Air Compressors for Air Compressor System Preventative Maintenance.
All Air Compressors specialises in compressed air service and repair, as well as air piping and line filters. Our mobile technicians are available for scheduled maintenance as well as breakdowns and repairs throughout NSW.
We're ready to assist you in ensuring that your air compressor and compressed air system are in good working order so that you can keep your operations running smoothly. Please contact us today to schedule regular air compressor maintenance.