Diaphragms in some turbines use crush pins to establish their position. Positioning these diaphragms properly is doubly challenging. The supporting crush pins need to be in contact with their seating areas when the proper diaphragm position is attained. Cylinder distortion affecting the seating area of the crush pins usually complicates the positioning process.
Mechtell streamlines diaphragm re-alignment by measuring the diaphragm itself and the precise location of each crush pin seat. From these measurements we calculate the height of each crush pin to achieve the desired diaphragm position as well as pin contact for all the pins.
The Mechtell diaphragm alignment process typically requires just a single fitting to achieve both the proper positioning and the desired pin contact . Further, we can position the diaphragms relative to specified bores or to the actual position of the rotor as measured before it is removed.