GUIDE APPARATUS FOR TURBOMACHINES

摘要

The invention relates to a guide apparatus for turbomachines, in particular for Francis or Kaplan turbines or pumps or pump turbines having a plurality of guide blades (3) which can be actuated via in each case one link (4) on a common adjusting member (5). Here, every guide blade or every second guide blade can be equipped with a safety element. It is principally characterized in that a bending-failure link (6) which can have a screw connection and a bending body (7) is provided as safety element. The screw connection is prestressed and is configured with a defined fracture cross section (12). The triggering force on the bending-failure link (6) and the holding force after a fracture of the safety element can therefore be selected independently of one another. The guide blades are protected against damage by foreign bodies in the guide apparatus.