| 摘要 |
Improved water-injected screw compressor element which mainly consists of a housing ( 2 ) on the one hand, confining a rotor chamber ( 5 ) with an inlet ( 6 ) on one far end and an outlet ( 7 ) on the other far end and in which two co-operating rotors ( 3,4 ) are provided which are bearing-mounted in the housing ( 2 ) with their shaft ( 16, 20 ) by means of water-lubricated bearings ( 17, 18, 21,22 ), characterised in that for every rotor are provided two pistons, a first piston ( 37, 38 ) and a second piston ( 17, 21 ) respectively, which can be each axially shifted in a guide, whereby each of these pistons ( 17, 21, 37, 38 ) makes contact with the rotor ( 3,4 ) concerned with one side or is part of it, and makes contact with a pressure chamber ( 41, 42, 43, 44 ) with an opposite side, in order to partly or almost entirely compensate for axial force components exerted by the compressed gasses on the rotors.
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