Compressors Flashcards
1
Q
What do dry screw compressors require to prevent rotor contact?
A
Trimming gears.
2
Q
What are 2 types of dual rotor screw compressors? Explain them
A
Wet screw, uses injected oil to lubricate, seal and cool air end.
Dry screw, no lubrication, delivers oil free air, some use water spray in compressor chamber to cool and help seal.
3
Q
What are the two type of screw compressor rotors?
A
Single rotor
Dual rotor
4
Q
What is the job of the minimum pressure valve?
A
Maintain pressure in the separator
Get oil flowing on start up
5
Q
Why is obtaining minimum clearances on love blowers so important?
A
To reduces thermal expansion.
6
Q
Timing gears cannot have what?
A
Excessive backlash
7
Q
Why are thrust bearings required in a lobe blower?
A
To maintain rotor position realities to the end plates.
