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Tag: refrigerated air dryers

Tips On Detecting Bearing Faults In Rotary Screw Air Compressors

Every machine working with roller bearings and gears exhibits high-frequency vibrations to some extent. An example of this type of machine is a screw compressor. Single-stage screw compressors are designed with two rotors with four to six blades on each rotor. 

The rotor rotates in the opposite direction of the blades almost touching to create a "screw" that compresses the air. You can also visit https:/compressedair.net.au/screw-air-compressors/ to buy the best screw air compressors.

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The compressor is usually driven by a motor that is connected directly to the male rotor which has a clutch gear which in turn drives the female rotor gear. The gears are synchronized so the rotors never touch.

With this mechanical configuration, vibrations of several different high frequencies can or will occur:

• Rotor grid frequency – equal to the number of male rotor blades multiplied by the motor speed. Therefore this frequency is in sync with the engine speed.

• Gear Frequency – equal to the number of gear teeth times the engine speed. In a multi-stage screw compressor, there is more than one set of transmission frequencies.

• Bearing frequency – depends on the specific bearing used in the machine. In general, the bearing frequency does not match the motor speed. The frequency of indoor and outdoor racing games will be the most common.

Standard alarm methods often do not work well on machines that have high-frequency vibrations, such as screw compressors, even when operated properly. This is due to the large vibrations that naturally occur in screw compressors.