VACUUM PUMP

摘要

The invention relates to a vacuum pump, particularly a screw-vacuum pump, having a pump housing (14) wherein pump elements (10) are arranged. The pump housing (14) has a first flange (48) that is connected to a second flange (50) of a pump element (10), such as a transmission housing. There is a sealing groove (54) in one of the two flange surfaces (52) of the flange connection (44) in which a sealing element, such as an o-ring, is arranged. There is a circumferential protective channel (60) within the sealing groove (54). The protective channel (60) is connected via a gas channel (62) and a connection channel (64), such as to a gas source or a vacuum shaft. The protection channel (60) protects the sealing element arranged in the sealing groove (54).