i have an electric motor that's submerged in water/glycol. after 1000 hrs of testing, i noticed two regions of corrosion or pitting 180 degrees from eachother. the corrion only effects the ends of the magnetic region of the rotor (see attached sketch). does anyone know what may have caused...
after 1000 hours of testing an electric motor runnig in water/glycol i noticed two large areas of corrosion on the rotor. The two areas of corrsion were located at each end of the magnetic portion of the rotor. The corrosion did not wrap around the circuference of the rotor which makes me...
I'm fairly new at rotordynamics and I'm having some trouble interpreting some test data. i would appreciate some input. We're working on a motor that runs on magnetic bearings. The mag bearings lost power during a test and the rotor dropped onto a set of auxiliary ball bearings while spinning...
Good afternoon,
I'm having some trouble understanding how parts will behave when submerged under 3,000 psi of water pressure. One case in particular - if there's a annular disk and hub assembly (both steel) with an interference fit of 2,000 psi. so my question is: even though the...
I'm looking to purchase a used 4,000 hp gearbox with a single stage helical gears. It was designed to be a speed reducer but I'd like to run it as a speed increaser.
Gear ratio - 14:1
low speed shaft - 1,800 rpm
high speed shaft - 25,200 rpm
the gearbox is single direction. Can i run...
I'm looking for a gearbox for a 4000 HP motor. Does anyone have any suggested vendors that i can work with? Preferably, I'd love to find a used gearbox that can handle this power. I'd appreciate any info on suppliers that may carry used boxes.
Thanks and best regards,
nick
I'm curious as to how the strength of an annealed 8inch round bar made of Inconel 625 varies from center to O.D. Is it possible that the strength (and hardness) is much higher the further you go out in radius? if so, by how much? Material cert shows that the material was tested to have a yield...
Hello,
I'm working on a motor enclosure design for a large electric motor. Originally it was designed as a one-piece solid cast part. I've been instructed to make a machined design instead. my plan is to take the original cast design and break it up into sections which would be welded...
Here's the problem: a disk made Inconel 625 (no heat treatment) was installed with an interference fit on a rotor. Since the disk was not heat treated, the hoop stress will reach the yield strength while its spinning. The yield strength is about 65 ksi and the hoop stress is expected to reach...
Hi All, I'm working a two large motor housing designs that weigh about 13k pounds. Do you know of any foundries that can manufacture this in one piece? I'm having trouble finding foundries in the US that can do cast steel in this weight.
thanks,
nick
Hi Everyone,
What are recommended Failure Criteria for a filament-wound carbon fiber tube under internal pressure?
Material is 60% fiber and 40% thermoplastic. The tube is wound at high tension (50% of its strength) in the direction parallel to the fiber orientation. I'm calculating that...
I'm trying to figure out the life of an o-ring under the following conditions:
1. Temperature will range from 70 to 300 degF
2. Air pressure in contact with o-ring will not exceed 5 psi
3. radially compressed to less than 1/4 of its strength
4. the only liquid in contact may be some...
I can't find any fatigue properties of Hiperco 50HS. Does anyone know where i can find data such as Fatigue Strength Coefficients, Fatigue Strength Exponents, or S-N Curves? Are there any rule of thumbs when cyclically loading this material? I'm using this material for its magnetic...
Are there any risks in using a heavy shrink fit on a 4340 steel disk? i heard of rules of thumb that suggest 2 to 3 thou per inch but my application requires a shrink fit of 0.035 inch interference on a 7.000 inch diameter rotor. The reason i need such a large shrink fit is because the rotor...
