Screw compressor

Abstract

In a screw compressor for gaseous media, in particular refrigerants, comprising a compressor housing, two screw rotors arranged in screw rotor bores in the compressor housing, which are rotatingly drivable and interact to compress the medium, and a control slide arranged adjacent the screw rotors and movable in a direction of displacement for controlling the compression of the screw compressor, in order to solve the problem that the compression of the screw compressor can be controlled, but not precisely regulated, it is proposed that a scannable element, which is scannable with a measuring sensor so as to recognize a position of the control slide in the direction of displacement, be coupled with the control slide.

1 . Screw compressor for gaseous media, in particular refrigerants, comprising a compressor housing, two screw rotors arranged in screw rotor bores in the compressor housing, which are rotatingly drivable and interact to compress the medium, a control slide arranged adjacent the screw rotors and movable in a direction of displacement for controlling the compression of the screw compressor, and a scannable element which is scannable with a measuring sensor so as to recognize a position of the control slide in the direction of displacement and is coupled with the control slide.  
   
   
       2 . Screw compressor in accordance with  claim 1 , wherein the scannable element has a scannable outer contour.  
   
   
       3 . Screw compressor in accordance with  claim 2 , wherein the scannable outer contour is a path with a scan area.  
   
   
       4 . Screw compressor in accordance with  claim 3 , wherein a path follower rests on the scan area of the path in mechanical contact therewith.  
   
   
       5 . Screw compressor in accordance with  claim 4 , wherein the scan area extends at an incline to the direction of displacement of the control slide.  
   
   
       6 . Screw compressor in accordance with  claim 5 , wherein the scan area extends substantially in a straight line.  
   
   
       7 . Screw compressor in accordance with  claim 4 , wherein the path follower is movable in a transverse direction extending transversely to the direction of displacement.  
   
   
       8 . Screw compressor in accordance with  claim 7 , wherein the path follower is movable in a straight line.  
   
   
       9 . Screw compressor in accordance with  claim 3 , wherein the path is designed such that the maximum distance to be traveled by the path follower in the transverse direction is less than the maximum distance to be traveled by the path in the direction of displacement.  
   
   
       10 . Screw compressor in accordance with  claim 1 , wherein the scannable element is arranged within the housing in the area of a bearing receptacle of the screw rotors.  
   
   
       11 . Screw compressor in accordance with  claim 1 , wherein the scannable element is arranged on a carrier mounted on the control slide.  
   
   
       12 . Screw compressor in accordance with  claim 11 , wherein the scannable element extends in the direction of displacement of the control slide away from the control slide.  
   
   
       13 . Screw compressor in accordance with  claim 12 , wherein the carrier is arranged at the end of a guide element of the control slide.  
   
   
       14 . Screw compressor in accordance with  claim 11 , wherein the carrier is arranged within a cross-sectional area of the control slide.  
   
   
       15 . Screw compressor in accordance with  claim 11 , wherein the carrier is arranged within a cross-sectional area of the guide element.  
   
   
       16 . Screw compressor in accordance with  claim 1 , wherein the measuring sensor is a position sensor.  
   
   
       17 . Screw compressor in accordance with  claim 16 , wherein the measuring sensor detects a displacement path of the path follower generated by the path transversely to the direction of displacement.  
   
   
       18 . Screw compressor in accordance with  claim 1 , wherein a control device is provided, which determines a position of the control slide by means of the measuring sensor and regulates a position of the control slide via actuation of an adjusting device for the control slide.