 |
No items matching your keywords were found.
Caterpillar generator
How to share equally kVAR load of 2 caterpillar 3512 generator sets?
These gen sets need to be configured with a load sharing controller.
One method commonly used is a CCCT ( cross-compensation current transformer) that lets each gen set know how much reactive power the other is producing, for VAR balancing purposes.
If you get a load sharing controller, be sure it specifically includes reactive power (kVAR) balancing, because some load sharing controllers only do real power (kW) balancing.
The Cat power folks can get you set up with the right part numbers.
2MW Generator Crank (October 12, 2006)
|
No items matching your keywords were found.
| Account limit of 2112 requests per hour exceeded. |
What can cause a caterpillar generator flexible plate bolts to be shear/cut?
This generator was in parallel with another generator, the bolts were sheared in the opposite direction of normal rotation.
When you say "flexible plate bolts" I know you are speaking about a particular part of the generator, but I don't know Caterpillar generators well enough to know exactly what you are refering to. However, I am going to assume you are talking about the flexible coupling that connects the generator and the motor that runs it. In general, what causes any bolt to shear is a shear stress that exceeds the ultimate strength of the bolt in shear. If this were the cause, then I would suspect the generator has siezed and the motor torque exceeded the shear strength of the bolts. This is one possibility. As a second possibility, remember that a generator is constantly in rotation. With substantial misalignment between the motor and generator, there is a constantly oscillating force on the bolts. This can lead to fatigue of the metal. In such a case, the fatigue strength becomes the limiting factor. A fatigue strength curve is a curve of strength versus number of cycles. Depending upon the RPM of the generator, the number of cycles could be enourmous resulting in very low fatigue strength.
It should be simple to test for a siezed generator. Assuming it's not siezed, I would look at the alignment between the engine and generator and suspect fatigue. If this is a real case, it is possible to send the bolts to a metalurgical lab for testing. They can positively identify whether it is fatigue or not.
2 Comments
First off you posted a comment trashing AutoCAD on a AutoCAD Tips and Tricks blog so there for it sound like you are an ignorant salesman with nothing better to do. Yes I am a fan but I have also seen behind the curtain. You clearly do not know anything about Autodesk. Yes they have a large marketing budget and could possibly trim back what they charge. But the single biggest expense is R&D / Programmers. The $4000 is going to pay for developing better software and for trouble shooting.
And I have played with IntellCRAP before; no it is not 90% of the same thing, more like 30%. And even by your own admission it is for people doing single residential housing design (the stuff I did while in school for $10 an hour). I get paid by major Utilities, ATT, Starbucks, FAA Battery manufactures, and Caterpillar Generator outfitters and many more to design things in CAD. But as I said above, if you like it, go for it, more power to you.
Next if you want all the people designing houses with Autodesk software to become your customer then great that is about .005% of their business. Most companies that buy the software do not give the designer the left over money after buying it anyways so all that money you listed above will be going into the owners pocket not the CAD guy.
Then your comment about Animation just shows how clueless you really are! Parametric has nothing to do with animating a door. Yes with AutoCAD, Revit or Inventor you can show animations of the door moving, but parametric design is about relationships between parts, automatic updating of changes and linking of dimension to the shape of the part.
If you want to talk about productive things in here feel free to ask questions. Hell, send me a copy of your software and I will give it a legitimate going over and give my honest opinion of it. You can even hire me to come give your company a class on how AutoCAD work as I did with a little company named Intergraph. You should never call someone ignorant without having all your facts straight.
I worked for an Autodesk ADN member for three years; we wrote 3rd party software that complimented AutoCAD. I have been using AutoCAD since R9 back in 1990. And yes I have used other platforms such as Solid Edge, Solid Works, and IntellaCAD and they all have their places and can do cretin things well. Do I think AutoCAD is perfect, no not at all… I found something just the other day and complained about it on the blog and newsgroups. A salesman who believed in his product would not try and push on it on potential buyers by making the biggest competitor look bad.
caterpillar generator set manual: