Subject:
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Re: Scrapers
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 13 Sep 2005 20:31:26 GMT
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Viewed:
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4036 times
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In lugnet.technic, Nathan Bell wrote:
>
> Is it possible they have a hydraulic drive controlled by only one engine?
I've never read anything to support this supposition. I've always thought
scrapers mainly use mechanical transmissions. I know Caterpillar likes to put
mechanical transmissions in things where other makers only use diesel-electric.
I'm sure there will have been electric scrapers, but I'm sure the majority are
straight diesel, with planetary's in the hubs probably.
> When
> the scraper bends down in the middle, it shortens the distance between the front
> and rear wheels, and visa- versa. That would mean that the axles would be
> turning at different speeds for a few seconds. Hydraulic drive would make this
> possible.
I saw a great show yesterday showing scrapers in action. The wheel spin when a
scraper got high-centered was amazing. I think it was a clay type soil and the
ground was really uneven, so traction was amazingly bad. I don't think the
operators we're particularly worried about the wheel-spin at all. I doubt
there's much synchronization between the front and rear engines other than a
basic governor on the older machines, new computerised systems may be making
inroads.
I also saw a third type of scraper that must be relatively new called an auger
scraper. It has a rotating auger in the bowl, which is powered, helping load the
bowl.
Theirs a link here
http://rocktoroad.com/auger.html
Steve
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Message has 1 Reply:
 | | Re: Scrapers
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| (...) Thanks Steve. Another thought- You know those long oval-shaped arms (one end bigger then the other) that connect the front half to the rear half? I bet there is a chain in there that drives the auger (or blades). Maybe it is the front engine (...) (19 years ago, 13-Sep-05, to lugnet.technic)
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Message is in Reply To:
| | Re: Scrapers
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| (...) Is it possible they have a hydraulic drive controlled by only one engine? When the scraper bends down in the middle, it shortens the distance between the front and rear wheels, and visa- versa. That would mean that the axles would be turning (...) (19 years ago, 13-Sep-05, to lugnet.technic)
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