| 摘要 |
PURPOSE:To make a drop of compression efficiency by heat generation preventable, by setting up a vane being capable of free protrusion and retraction and adjusting the amount of said motion, while making a noncontact construction possible to meet the sliding surface of each swing blade. CONSTITUTION:This device is comprised of the following mechanism: A vane 17 is set up inside each of swing blades 6 so as to cause one end to come out from each sliding surface of the swing blade 6 while the bottom side of the vane 17 is provided with a screw 18 and a nut 19 respectively, and the vane 17 is so arranged that a distance space between a blade surface and the swing blade surface corresponding to said blade surface can be freely adjusted and set by using a clearance gauge, etc. That is to say, since swing blade surfaces are noncontact in structure, high accuracy for machining these swing blades is unnecessary and likewise a drop of compression efficiency caused by friction and/or frictional heat can be thus obviated. |
