| 摘要 |
<p>The twin-screw rotor structure, for use in displacement machines for compressible materials and media, has a pitch which is not constant, and is defined by a variable related to the working angle round it. The pitch in the first section increases ( DELTA W1) from the entry end to a max. value after one turn angle. The following section has a reduced pitch to a min. value at a point of one turn angle before the outlet. The last, and third section, has a constant pitch ( DELTA W3). The spirals (7) have a constant thickness (h).</p> |
