Can anyone tell me if there is a benefit to using square wire, as opposed to round wire, for a large torsion spring?
I need to replace some damaged springs (square wire), but can't locate a manufacturer who can build them. I am told that a round wire type can be readily produced. I...
These turbines were installed in the early 1960's. The original contract specification didn't have any wording for a maintenance platform. Given their age there is need to perform inspections and repairs from below the runner.
I just want to know what procedures or guidelines other...
Is anyone aware of a procedure and/or design for installing maintenance platforms in the draft tubes of vertical hydro-turbines?
In one of our facilities we "float the boat". Which entails raising the water in the draft tube to just below the man-door and a maintenance person on a makeshift...
The USBR has a manual (FIST 2-8) on penstock inspection that may answer your question. Also, I believe ASCE has a book written on the subject (Guidelines for Evaluating Aging Penstocks).
http://www.usbr.gov/power/data/fist/fist2_8/vol2-8.pdf
ISO 7919 is a good source for understanding/setting vibration limits as it covers a wide array of machinery types. Depending on your machine there are 5 parts (1-General guidelines; 2-Large Steam Turbines; 3-Coupled Machines; 4-Gas Turbine Sets; 5-Hydro Turbines)
