Lubricant sealed rotary vane oil rotary vacuum pump

摘要

A lubricant-tight vane rotary vacuum pump and includes a pump stage (17) having a pump stage housing (10) with a gas inlet and compression chamber (11), and a gas outlet (51), a channel (50) connecting the compression chamber (11) with the gas outlet (51), and a groove (54) at least partially surrounding a mouth of the connecting channel (50) that opens into the gas outlet (51), so that lubricant, which is tossed out of the compression chamber and is collected in the groove (54) and re-entry of the lubricant back into the compression chamber (11) is prevented.