Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Mechanical & Electrical

 
 
SFT Search:
Reply
 
Thread Tools Display Modes
  #1  
Old 02-02-2024, 05:02 PM
greywynd's Avatar
greywynd greywynd is offline
I can dig it
 
Join Date: Dec 2005
Location: Wainwright, Alberta
Posts: 6,957
Default Hydraulic Power Pack/Unit

I’m starting to think about how to put together a hydraulic unit for various uses I have.

Looking for 10 gpm, average 1500psi, with a 2200-2500 max pressure. One of the main uses would be to drive hydraulic motors, and I want to be able to adjust the speed of the motor. On the commercial units that we use at work, they use a variable output pump that is activated by an electric pusharm. I’m guessing a flow control valve and a bypass line can also be used?

I know the very basics of hydraulics and that’s about it.

To drive the pump I figure there are three possible options. Electric motor, gas/diesel engine, or tractor PTO.

I’m not looking to be ‘cheap’, but if I can do it for a reasonable price over time I’m okay with that.

Give me some input on what sort of other factors and variables I’m not thinking of!

Looking forward to seeing what the collective mind here puts forward.


Sent from my iPhone using Tapatalk
Reply With Quote
  #2  
Old 02-02-2024, 06:48 PM
Scotts's Avatar
Scotts Scotts is offline
Stuff, Just stuff
 
Join Date: Dec 2004
Location: Wichita Kansas
Posts: 5,708
Default

The variable output pump will build less heat. If this is for your bore repair I would go with that as you tend to run them for more than a few hours at a time and the heat build up from a relief and flow control system might be too much. Or you could run a heat exchanger to keep the fluid cool and that adds another layer of complexity to the system.

The above system should run on any power you decide to go with.

Scott
Reply With Quote
  #3  
Old 02-02-2024, 07:41 PM
Whitetrash's Avatar
Whitetrash Whitetrash is offline
Elite Member
 
Join Date: Mar 2009
Location: Estes Park, CO [Around 8000 Ft. Elv.]
Posts: 4,622
Default

+1 on what Scotts said I would go electric drive with a larger than required tank reservoir. Because of how long the run cycle might be more is better sort of like a deep sump pan on a high performance motor. 10 GPM figure on running 15-20 Gal tank the oil will stay cooler and the pump happier. Electric drive is quieter and more dependable IMO unless power is an issue. I would also consult our "Guru" Ron on all things oil related on perhaps the best Synthetic Hydraulic Fluid that would be least effected by Temperature extremes. Oh, I thought this might be for bore welding depending on end use this might be overkill
__________________
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery."
Winston Churchill
Reply With Quote
  #4  
Old 02-02-2024, 07:57 PM
Whitetrash's Avatar
Whitetrash Whitetrash is offline
Elite Member
 
Join Date: Mar 2009
Location: Estes Park, CO [Around 8000 Ft. Elv.]
Posts: 4,622
Default

I cannibalized an old Coates truck tire machine to make my power pack. There is a thread here somewhere about it. No clue how to find it it's many years old but, the power pack is still getting it done when I need it.
__________________
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery."
Winston Churchill
Reply With Quote
  #5  
Old 02-02-2024, 08:20 PM
digr's Avatar
digr digr is offline
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 9,296
Default

Quote:
Originally Posted by Whitetrash View Post
I cannibalized an old Coates truck tire machine to make my power pack. There is a thread here somewhere about it. No clue how to find it it's many years old but, the power pack is still getting it done when I need it.
Here it is
__________________
Drawing by Smartdraw
Reply With Quote
  #6  
Old 02-02-2024, 09:04 PM
Whitetrash's Avatar
Whitetrash Whitetrash is offline
Elite Member
 
Join Date: Mar 2009
Location: Estes Park, CO [Around 8000 Ft. Elv.]
Posts: 4,622
Default

Thanks, Digr I am truly amazed you found it that easily. What's cool about it is the Hydraulic motor circuit I can use with parts of the original tire machine that ran the mount/demount cycle so it has gear reduction mechanical advantage. It will Cold Twist 1/2" pickets for railings with out even grunting.
__________________
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery."
Winston Churchill
Reply With Quote
  #7  
Old 02-03-2024, 06:07 PM
greywynd's Avatar
greywynd greywynd is offline
I can dig it
 
Join Date: Dec 2005
Location: Wainwright, Alberta
Posts: 6,957
Default

Getting some ideas for sure.

The main plan is for this to be able to run my boring unit, which is where the flow and pressure specs came from.

However I always figure that it can do other things too, maybe a press in future, or saws, or who knows exactly.

I even debated about setting something up to be PTO powered off the little Kubota for the fact that for now it will only see occasional use.

Gerry this isn’t a ‘rush’ project by any means so good chance I will be by again before I get anything started.


Sent from my iPhone using Tapatalk
Reply With Quote
  #8  
Old 02-03-2024, 06:53 PM
Whitetrash's Avatar
Whitetrash Whitetrash is offline
Elite Member
 
Join Date: Mar 2009
Location: Estes Park, CO [Around 8000 Ft. Elv.]
Posts: 4,622
Default

Mine at this point is pretty much dedicated to powering my wood splitter. I would like to upgrade the splitter at some point 5 horse electric motor, 2 stage pump and a 100ft cord so it will cycle faster have a little more grunt and I don't have to string my welder extension cords across the yard every time I want to run it. That will free up my old power pack for running a small press brake, picket twister maybe even a baby plate roll.
__________________
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery."
Winston Churchill
Reply With Quote
  #9  
Old 02-04-2024, 12:49 AM
mccutter's Avatar
mccutter mccutter is offline
Do I have a life?
 
Join Date: Mar 2006
Location: Central Florida
Posts: 11,426
Default

Look around for a surplus "Jaws Of Life" cutter from a fire dept. replacing with a newer unit?

Pic is a random debay sample. They want $3Gs OBO for it...
Attached Thumbnails
Click image for larger version

Name:	jaws.jpg
Views:	118
Size:	197.0 KB
ID:	170028  
__________________

TA Arcmaster 185 w/tig/stick kit
MillerMatic 252 w/3rd gen 30A
MM140 w/o AS, w/CO2
Hobart (Miller) 625 plasma
Hobart 250ci plasma
Victor O/A (always ready, but bored)
HF 80 lunchbox w/tig
45ACP Black Talons for those stubborn jobs...
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 06:39 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.