Dry-compression compressor and method for oil separation for a dry-compression compressor

A dry-compressing compressor for generating a compressed gas, having one or more compressor stages, comprising

• a compressor housing,
• at least one compressor rotor, which is rotatably mounted in relation to the compressor housing via a rotor bearing,
• wherein the compressor housing comprises
• a compression chamber for compressing gas drawn in by the compressor rotor and
• at least one oil chamber, in which at least one oil-lubricated bearing of the rotor bearing for mounting a shaft section of the compressor rotor is accommodated, a shaft seal arrangement assigned to the shaft section, which is arranged between the oil-lubricated bearing and the compression chamber to seal the compression chamber against oil ingress from the oil chamber, and has a seal,
• wherein the oil chamber has at least one gas inlet for a leakage gas flow from the shaft seal arrangement and a gas outlet which is connected to at least one oil separator, wherein the oil chamber is designed to provide an oil chamber pressure pOR which exceeds the ambient pressure po of the compressor housing by an oil separation pressure difference Δp, which is preferably at least 20 mbar, characterized in that the oil separator comprises a plurality of separation stages, wherein the plurality of separation stages comprise an oil mist separator having one or more of a fine separator and a residual oil separator.

A dry-compressing compressor for generating a compressed gas, having one or more compressor stages, comprising

• a compressor housing,
• at least one compressor rotor, which is rotatably mounted in relation to the compressor housing via a rotor bearing,
• wherein the compressor housing comprises
• a compression chamber for compressing gas drawn in by the compressor rotor and
• at least one oil chamber, in which at least one oil-lubricated bearing of the rotor bearing for mounting a shaft section of the compressor rotor is accommodated,
• a shaft seal arrangement assigned to the shaft section, which is arranged between the oil-lubricated bearing and the compression chamber to seal the compression chamber against oil ingress from the oil chamber,
• wherein the oil chamber has at least one gas inlet for a leakage gas flow from the shaft seal arrangement and
• a gas outlet which is connected to at least one oil separator,
• wherein the oil chamber is designed to provide an oil chamber pressure pOR which exceeds the ambient pressure p0 of the compressor housing by an oil separation pressure difference Δp, which is preferably at least 20 mbar
• characterized in that the compressor comprises a blow-off valve for releasing the oil chamber pressure pOR from the oil chamber.