Screw compressor
AssigneeHitachi, Ltd.
InventorsTakeshi Hida, Shigekazu Nozawa, Masayuki Urashin, Noriyuki Yamazaki
Life of this patent
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Abstract
Oil separation from discharge gas of a screw compressor is performed with a demister provided in a discharge chamber. For solving unevenness in the speed distribution of the gas in the chamber, at least one auxiliary demister for oil separation is disposed at a local position immediately behind or near the downstream side of an outlet of a discharge passage in a discharge casing so as to be perpendicular to the flow direction of the gas at the outlet. In addition, at least one obstacle plate is disposed on the downstream side of the auxiliary demister.
Claims5
A screw compressor comprising
- a casing including at least one pair of male and female rotors engaging with each other, an electric drive motor and a bearing member;
- a discharge casing provided with a discharge passage for gas and attached to said casing;
- a discharge chamber provided therein with a main demister for oil separation, a wall of said discharge chamber being joined with said casing such that said discharge chamber contains said discharge casing therewithin;
- and
- at least one auxiliary demister disposed at a local position immediately behind or near the downstream side of an outlet of said discharge passage so as to be perpendicular to the flow direction of gas at said outlet.
A screw compressor comprising
- a discharge casing provided with a discharge passage for gas compressed by male and female rotors engaging with each other;
- a discharge chamber containing said discharge casing therewithin;
- a main demister disposed in said discharge chamber;
- and
- an auxiliary demister disposed on the upstream side of said main demister in said discharge chamber so as to be opposite to an outlet opening of said discharge passage.
Dependencies are inferred from the claim text.