Project Description
TWIN LOBE AIR COMPRESSOR
Description
These are Positive displacement twin lobe compressors suitable for a wide range of operating speeds to meet the exact capacity requirements of the application. They can be offered for pressures upto 1000m bars and for vacuum duty upto 600m bars. These machines can also be used for compression or boosting of various cases.
Technical Details
- The two lobe type roots blower is a positive displacement blower.
- The lobes of rotors are of cycloid or involute form giving a correct mating to seal the delivery side from the inlet side.
- The high pressure delivery side is sealed from low pressure suction side at all angular positions. This sealing continues until delivery commences.
- To reduce wear, a small clearance is provided between lobes and casing.
- The clearances, however forms a leakage path and has an increasingly adverse effect on efficiency as the pressure ratio increases.
- As the rotors are symmetric about their center of rotation, the operation is dynamically balanced.
- Air is expelled four times with each revolution of the drive shaft, or twice with each impeller, the fundamental frequency of the pressure pulse is four times the shaft speed.
- The operation is positive displacement as the air is drawn, trapped and discharged by the movement of rotors.
- For two lobes of rotors, work done per revolution of rotors. As W=4(P2-P1) V.
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