Generator Compartment Build

[Jcparmley]

That is hilarious!  I can't believe I wrote that and didn't catch it.  Must have been too much wine.

  LOL! Sorry!

[Van]

 

[chessie4905]

heres the part number for the airbags  Nephew says he can get them around 80 bucks each.

[chessie4905]

https://www.ebay.com/itm/FIRESTONE-W01-358-7001-W013587001-BRAND-NEW-/392717297261?redirect=mobile

A little checking with that number may find a better price. Was also available on Amazon, but not presently. Watch air pressure. Use regulator. Go to Firestone info for pressure. Don't inflate unloaded.

[richard5933]

Do those have lateral stability?

Do they hold air even when the bus is not aired up? Would hate to have to run the bus just to be able to air up the generator air bags.

Interesting idea though, if they add enough isolation to make worth the effort.

[chessie4905]

Call marathon. 😙  they should stay up fine if they don't have any leaks, just like airbags.

[luvrbus]

Call marathon. 😙  they should stay up fine if they don't have any leaks, just like airbags.

They do those 2 ways,tied into the bus air system with a check valve or manually inflate each one they hold air for months  you can find those at truck wrecking yards some trucks use those for cab mounts and seats lol I forgot what truck now

[buswarrior]

Do those have lateral stability?

Do they hold air even when the bus is not aired up? Would hate to have to run the bus just to be able to air up the generator air bags.

Interesting idea though, if they add enough isolation to make worth the effort.

Absolutely worth the effort, no more mechanical vibration and related noise transmitted to the chassis.

A good piece of braided flex pipe is part of the install for the exhaust

The little bags have a rating, stay under it, no one has ever indicated a lateral stability problem in all the years i've been playing this game.

Air integrity is the same as a tire. It will only leak when something gets old...

Happy coaching!
Buswarrior

[chessie4905]

A little more on air cushion settings on Prevost group.


http://forum.prevostownersgroup.com/archive/index.php/t-6209.html

[freds]

Very interested in air springs for my generator also!!!

This part is made by a number of manufactures:

• Firestone W01-358-7001
• Numatics ASNS11-1-1
• Continental FS-50-5-ci
• Goodyear 1B5-500

Other interesting URL's:

https://www.mrostop.com/w01-358-7001-firestone-single-convoluted-air-spring

https://www.mrostop.com/fs-50-5-ci-1_4-npt-ca-continental-bellows-style-single-convoluted-air-spring

https://www.phoenixvibrationcontrols.com/wp-content/uploads/2017/08/FS-50-5-CI.pdf

https://www.asco.com/ASCO%20Asset%20Library/numatics-air-bellows-catalog.pdf

https://www.asco.com/ASCO%20Asset%20Library/numatics-airbellows-asns11-1-1-catalog.pdf

In my case the following part looks very, very interesting:



https://www.radwell.com/en-US/Buy/FIRESTONE/FIRESTONE/W02-358-3005

https://www.mrostop.com/w02-358-3005-firestone-reversible-sleeve-air-spring?utm_source=octopart&utm_medium=cpc&utm_campaign=octopart%20Shopping

[freds]

Do those have lateral stability?

Do they hold air even when the bus is not aired up? Would hate to have to run the bus just to be able to air up the generator air bags.

Interesting idea though, if they add enough isolation to make worth the effort.

I don't think so, some installations that I have seen have metal cage with a air gap to stop movement as a backup.

[peterbylt]

I also have a 20KW PowerTech generator.
 
Mounted differently, it shares the driver’s side first bay with the Mini Split.
 
It is mounted on a Slide out rack and uses small airbags, the slide out mount and Airbags were with it when I got it.
 
The Radiator Fan came configured so that it blows out, I cut some holes in the Bay door, the one in front of the generator has the same square inches as the Radiator, There are also holes cut in the floor under the Generator head for incoming air.
 
Everything works great.

The problem I am experiencing is when I am driving with the Baydoor closed after about 5 miles at interstate speeds the temperature starts to go up and the high heat sensor will kick the Generator off, approx. 210 – 215 degrees.
 
If I drive with the bay door open, no issues at all (except people pulling up beside me and telling me the Bay door is open)
 
I noticed in your first pictures a Blower, I am thinking if I have one of those pulling air up through the floor it will create a positive pressure inside the generator bay and overcome the pressure gradient created on the outside of the door at interstate speeds.
 
Could you tell me where you got that blower and the CFM if you know it?


 

 



Peter

[chessie4905]

Not surprised there is a problem. Need the air to flow through somehow. And radiator sealed against air inlet so air doesnt go around radiator instead of going through.

[chessie4905]

I was there this evening when he installed 4 new generator air bags. Tag says the old ones were 1992, except one the prev. owner replaced a few years ago. While there, looked over generator. On the exhaust at the engine, there is a circular container about 12 to 14 inches in diameter and about 3" thick. It is made of cast iron. On one side, the exhaust comes out via insulated flex pipe and terminates back of compartment to black iron pipe that goes up through roof. Little flapper on outlet. No noise at exhaust. Btw, the engine has a little turbocharger. No radiator in compartment, so must plumb to engine radiator. Is on a slide out. Engine sits in compartment just behind left front wheel and is parallel to coach.

[Jcparmley]

Those are all great points to consider.  I've drawn up a sketch of what might work.  Let me know what you think.  The first bay would have the squirrel cage fan pulling in fresh air (from the side through the door or through the floor?) through the radiator.  The air would go past a few switch backs with sound deadening material.  It would then enter the generator compartment, which will also be lined with deadening material.  The air would then exit the generator compartment through a switch back and into what is now the AC bay and back to fresh air.  Would such a design work with keeping the gen cool and also keep it silent?


 

Openings have to go around corners to suppress sound.

Creating a series of switchback cavities, with enough cross section to satisfy the particular air flow needs of the equipment is the challenge.

Sound deadening material lining the switchback takes all the bounce out, and silence will be lovely.

Switchback cavities consume space, but the silence of operation will make you forget soon enough...

Happy coaching!
Buswarrior