Yes, we are in the process of contacting the manufacturer. Also, I have been thinking about startup time. I think that's how I got the 449HP. That would be approximately what it would take to get the 20ton drum up to 24rpm in half a revolution. I'll have to investigate whether or not starup time...
Just doing a little thinking...
Should I not even be looking at the weight of the drum and focusing more on the amount of scrap metal that the drum needs to dump off? At almost 20 tons and 24 rpm I'd think that once the rotor got going, it'd have quite a bit of inertia and would therefore need...
Let me apologize in advance for not knowing the basics; it's been awhile since I've needed to use them.
I need to determine what the HP rating needs to be for a motor that will turn a Drum Magnet used for ferrous separation systems. Here's and example of what it looks like...
Thanks guys.
OK, so let me see if I did this right:
SAE Grade 8 bolts are 150ksi ultimate tensile and 91ksi ultimate shear.
921587N ~ 207181 lbs
Choose 16 1-inch bolts:
(207,181/16)/[pi(.5)^2)]= 16.4ksi per bolt
If I choose 6 bolts (still 1"), it comes out to 43.9ksi per bolt, almost 2...
I need to design a flange for a disc brake rotor that will be used to stop an automobile shredder (the rotor and hammers). Here are the specs on the brake rotor/caliper that were given to us by our brake supplier:
Rotor Disc Material: St 52.3 (ASTM A738 equivalent)
Rotor Disc Diameter: 2.6m...
Just thought I'd give an update on what was going on. Here's the original thread that you can refer to:
thread507-86835
Well, after dumping more than 1000 cubic yards of dirt, the pad fill is pretty much done. I'm not sure what type of dirt was used, but it pretty much seemed like the same...
Focht3,
Here's the deal. I was asked to be in charge of determining what we would need to complete this project. As far as the actual design, I simply based my models on what I was told to make them. At first was told to make it 10" thick, but then the "maintenance" guy said we...
Well, I thought I'd all let you know that it doesn't matter now. The contractors already came and are starting construction. I guess the least I could do is keep you updated as to what ends up happening with this situation. I'll be taking a lot of pictures during the construction to see how it...
Focht3,
I've only been working here for about 2 months (also my first real job), and haven't quite been caught up to speed on how things work around here. From what I've seen and heard, the shredders do get delivered in pieces. In fact, we just shipped that blue part in the picture today. It got...
aggman,
Just to clarify, the parts I listed above are not the only parts that get put on the pad (at least that's what I've been told). There are many more parts, so they do indeed add up to about 300-400 tons.
I agree, though, I am probably in over my head. I'm trying my best with what I have...
Oops. Corrections to the above weights.
http://www2.et.byu.edu/~brb6/EngTip/Site_03.JPG
140,000 lbs not 60,000
http://www2.et.byu.edu/~brb6/EngTip/Site_04.JPG
34,000 lbs not 15,000
http://www2.et.byu.edu/~brb6/EngTip/Site_05.JPG
98,000 lbs not 90,000
OK, here are some pictures that may shed some light.
http://www2.et.byu.edu/~brb6/EngTip/Site_01.JPG
In this picture you'll see our crane, and the relative size of the parts we work with.
http://www2.et.byu.edu/~brb6/EngTip/Site_02.JPG
Here are the relative sizes of parts to a person...
OK, here's some more info. Focht3...we're in El Paso, TX. While we are close to the Rio Grande, I wouldn't exactly call it waterfront. We're well over 1000 feet from the river. Also, the river has been completely bone dry for quite some time. Don't know how that affects it though.
I also just...
Thanks for the replies so far. Those books/links look like good places to start.
Truth be told: In my mind management should have paid to have a structural expert be in charge of this project, but because I am an "engineer" it's assumed that I know everything engineering. Like I said...
First of all, let me say, WOW! I can't believe the wealth of knowledge that can be found on this site. First time posting and hope to be able to contribute.
I'm supposed to be a design engineer, but manufacturing engineering is my background, so I'm VERY new to working with structural design...
