Improving the reliability of a guide vane actuating mechanism for bulb–type units [articol]

Abstract

The analysis has as purpose to notice the elements that can produce incidents during the running of the regulating apparatus of bulb turbines. The analyzed regulating device has a robust construction. Although, a critical element is the connecting rod which can produce two types of incidents: a) the detachment from the joining bolt of the regulating ring and b) the uncontrolled modification of the length during the running. The kinematical analysis of the guide vane regulating apparatus shows that the connecting rod fulfills a three-dimensional movement of great amplitude. There were made recommendations regarding the reliability increase of the system.