Airspring dump

[deldirt]

youtube "airspring dump"

anyone tried this ?

 

[Duffster]

Post a link.

 

[beenthere]

YouTube - Air Spring Dump Trailer

Surprised she wasn't wearing the tongue of that trailer, when the box raised.

Wonder what the availability of these air springs are in that configuration. Anyone have more info on them?

 

[blueone]

I've used these in industrial applications for years, like lift tables, clamps, without fail. Check this link.Firestone Industrial Products Co. ~ North America Industrial Applications

Look at the last one it has 53,600 lbs of force applied right you could move anything, well almost.

 

[beenthere]

And the advantage and cost comparison to doing the same comparable job/lift with hydraulic is what?

What did the woman "trigger" to get the trailer to raise in the YouTube vid?
I noticed she didn't demonstrate but a "lift" of an empty trailer. Was air added to the air spring to get it to lift?

 

[LD1]

It sure was easy with an empty trailer.

It appears to be about 10" in diameter and @ 100psi of air that would give roughly 11,000lbs of force. But hydraulics are positive displacement. The fluid wont compress, which means hydraulics will raise just as fast under load as empty.

Look at the volume of air required to fill that bladder with 100psi. How long would it take your air compressor to fill a tank that size to 100psi??? I am guessing longer than if it were a hydraulic trailer. That trailer with 7k on it looks like it would raise pretty slow to me.

 

[Zick]

YouTube - Double Spring Dump Trailer

He has more videos. Doesn't seem too bad.

 

[Iplayfarmer]

Interesting.

To me the advantage of the air spring is the reserve capacity created by a tank. There's no cheap and portable way to store hydraulic energy. With a moderately sized tank, a very small compressor can store enough compressed air for a dump.

The inverse would also be true. The same sized motor could dump a lot faster or a lot more weight via stored compressed air than could be done with hydraulics.

I wonder how much these would cost.

 

[bobodu]

Now.......hook something like that to the truck's exhaust. Hmmmm.

 

[jimmysisson]

Maybe the advantage to air is the smaller compressed size, so the geometry can be easier and still have a low bed.
Jim

 

[20 20]

YouTube - Double Spring Dump Trailer

He has more videos. Doesn't seem too bad.

I have to wonder what the true weight of that load was. The narrator said 5000+lbs, To me I would say under 4000lbs??????? Hard to tell without being there or seeing it on scales

 

[schmism]

It sure was easy with an empty trailer.

It appears to be about 10" in diameter and @ 100psi of air that would give roughly 11,000lbs of force. But hydraulics are positive displacement. The fluid wont compress, which means hydraulics will raise just as fast under load as empty.

Look at the volume of air required to fill that bladder with 100psi. How long would it take your air compressor to fill a tank that size to 100psi??? I am guessing longer than if it were a hydraulic trailer. That trailer with 7k on it looks like it would raise pretty slow to me.

depends on your compressor. would be easy to slap the air chuck on the tank before i run to get gravel from the shop compressor. else a little portable compressor running off the aux circuit of the 7 way (running off the tow vehicle) running during transit.... if your trip time is 10 min and it takes 5 min to fill the thank, what do you care?

Some other obvious advantages. Low pressure 100psi air vs 3500psi hydraulics. Could be plumbed and parts acquired for a feild fix at any big box hardware store... no so for leaky/blown hydraulic lines.
No additional linkages or scissor mechanisms to wear out. no pins on the ends of the hydraulic rams to shear off (ask Eddie about that)
only need a compressed air source to run the bags. if the onboard compressor buns up you can always stop at a gas station and fill the tank. If the motor on your electric over hydraulic burns up... still no dumping the load without re plumbing to a separate hydraulic source.

as to speed. loaded version looked no slower than electric over hydraulic setup which can seem agonizingly slow especially at near capacity.

 

[bobodu]

So what keeps the thing from shooting straight up when half the load is dumped???