Oil-lubricated rotary vane vacuum pump

Abstract

An oil-lubricated rotary vane vacuum pump has a rotary vane unit that includes a rotary vane chamber and a rotary vane rotor. The vacuum pump has an oil separation and reprocessing device in which oil and gas that have penetrated into the rotary vane unit are separated by a separation device formed by a filter element and/or a gravitational and/or impact separator and/or a fine particle separator, preferably along with an oil foam decomposition device and/or with an oil cooler and/or with an oil pump. One or more monitoring and/or maintenance devices are provided for the devices, and the oil separation and reprocessing device is accommodated in an oil separation and reprocessing housing. The gas successively flows through two separation devices within the oil separation and reprocessing housing, and the two separation devices are both accessible for maintenance from a face wall.

1 . An oil-lubricated rotary vane vacuum pump ( 1 ) with rotary vane power unit ( 2 ), comprising a rotary vane chamber ( 5 ) and a rotary vane rotor ( 6 ) and with an oil separating and recycling unit ( 3 ), wherein a separation of oil and gas, which has passed through the rotary vane power unit ( 2 ), is effected in the oil separating and recycling unit ( 3 ) by a separating device (T 1 , T 2 ), which is preferably formed by a filter element and/or by a gravity and/or impact separator ( 24 ) and/or a fine separator ( 25 ), preferably in conjunction with an oil foam degradation unit and/or with an oil cooler and/or with an oil pump, wherein one or more monitoring and/or maintenance units ( 37 ) are provided for the said units and the oil separating and recycling unit ( 3 ) is accommodated in an oil separating and recycling housing ( 13 ) with sidewalls ( 14 ,  15 ), a bottom wall ( 16 ), a ceiling wall ( 17 ) and face walls ( 18 ,  19 ), wherein the sidewalls ( 14 ,  15 ) extend transversely to a rotation plane of the rotary vane rotor ( 6 ) and define a longitudinal extension of the oil separating and recycling housing ( 13 ), wherein the gas within the oil separating and recycling housing ( 13 ) flows through two separating devices (T 1 , T 2 ), which are both accessible for maintenance from a face wall ( 18 ). 
     
     
         2 . The rotary vane vacuum pump according to  claim 1 , wherein both separating devices (T 1 , T 2 ) are singly insertable and removable. 
     
     
         3 . The rotary vane vacuum pump according to  claim 1 , wherein both separating devices (T 1 , T 2 ) are connected to each other, combined for joint insertion and removal. 
     
     
         4 . The rotary vane vacuum pump according to  claim 1 , wherein a gas path is formed without valves between the separating device (T 1 ), which is first in gas flow direction (b) and the separating device (T 2 ), which is second in gas flow direction (b). 
     
     
         5 . The rotary vane vacuum pump according to  claim 1 , wherein the length (c) of the gas path between the separating device (T 1 ), which is first in gas flow direction (b) and the separating device (T 2 ), which is second in gas flow direction (b) corresponds to a diameter dimension or less, of the first separating device (T 1 ). 
     
     
         6 . The rotary vane vacuum pump according to  claim 1 , wherein a further separating device (T 3 ) is provided, for example in the form of a gravity and/or impact separator ( 24 ).