Hi, I have a large 3ft diameter turbine bearing that has a damaged non-contact mechanical Labyrinth seal that uses multiple brass rings in the assembly. My machine shop is proposing to replace the lab seal with a 1 piece aluminum housing out of 6061-T6 with the grooves cut directly into the...
Hi,
I'm currently designing a permanent pipe dock to be installed at the cabin...In addition to considering buckling, I need to consider ice loading...Does anyone know what the design pressure due to ice loading on marine structures is? Is this load dependant on the body of water (My location...
Hi Guys,
Our design group has recently provided a criteria regarding the use of SMAW electrodes and MIG wire consumables with the restriction of less than 16ml/100g of diffusable hydrogen and we are trying to conclude if the consumables we have in stock meet these specs.
BLUE MAX 309LSI SS...
I'm looking for some feedback in regards to standard cavitation repair practices for turbine runner blades in the hydro electric industry. There are various opinions regarding pre-heat of runners prior to a gouging operation and welding Stainless overlays onto cavitated areas.
Typically our...
PROBLEM: Unfortunately site has no more 1.5" square PTFE braided packing in stores for their water seal stuffing box, located on one of their hydraulic turbine units.
Shipping is 7-10 days and they need the unit online ASAP. The question is, can we compress 1.25" square braid (in stock) to fit...
I recently have been performing design calculations for a small cast iron link with an applied bearing load (pins)on each end, compressing the link. 2.375 OD bushings are spaced 6" center to center at the link ends. cross section of the link 3" x 1.5" thick.
Using Eulers formula for pin ended...
Can anyone recommend repair options for a 12" long crack on a 4" thick cast iron turbine casing? This 17 ton component is located inside a turbine pit which holds a dual francis horizontal runner/shaft assembly. Will a weld repair be successful if preheat is not possible?
Thanks.
I am considering using a 1 1/4" nylon lock nut for my application, however, due to thread engagement limitation I would like to consider the Prevailing torque nut. I am unfamiliar with this style of nut. Can anyone provide input on how well it works?
What is a recommended preheat and post heat temperature for welding (7018 electrode) around a 10" dia. 4130 steel shaft (Quenched and tempered)?
I have read that a suggested preheat is in the order of 300 deg.C but have not found any post treat recommendations? Any other precautions I should...
My past experience with removing tapered bolts from a coupling flange was that they were torqued so tightly, we destroyed them while attempting removal. Now that new bolts have been fabricated, I am looking for any industry standards or calculations for taper bolt applications...
Can anyone...
In order to ensure that the proper bolt preload is achieved, I have calculated a corresponding bolt elongation using the following formula:
Total Elongation = sum of [(PxL)/(AE)], at various cross sections of the bolt.
I found that the actual Torque value was less than what I estimated it...
What concerns must I address when cutting 4" thick plate from a large Cast Iron object (to large to preheat)?
The methods used to cut these pieces would probably be Plasma Arc or Exothermic cutting rods. I am looking for specifics on max. allowable temperature before changing metallurgy, heat...
