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Construction Equipment Tech Hydraulics, Electronics, General Engineering, ect in constr equip |
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#1
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help please - which hydraulic pump
hi everyone,
I have been into R/C for a number of years but I am completely new to hydraulics. I am currently building a tipping semi-trailer, thinking of making it hydraulic as a simple installation for my first step. Everything needs to be self-contained within the trailer (pump/ oil tank/ etc) so I can use the existing wireless control installed in the prime mover. The ram will be a multi-stage cylinder with only one port, so I think I need a reversible pump because I'm not planning on servo activated valve gear. Many of the pre-assembled pump/ motor combos seem to need 12V (Garden Trucking/ Wedico/ ScaleArt), but I'll be running 7.2V pack in the trailer due to voltage limits of some other electrical kit. I am comfortable to source an appropriate (gear)motor as long as I know what RPM is required. The extended ram will probably need around 80ml of fluid to fill it, so a pump flow rate of around 200 - 240ml per min flow rate to give a reasonable lift time 20 seconds or so. Looks like most of you guys use 10 - 12bar? Can anybody recommend a suitable pump? Also how much extra should I allow for tank capacity to ensure no air gets in when the ram is fully extended? Also any other advice welcome - eg. do I need a pressure relief valve? filter? Also happy to consider any second hand stuff if anybody has stuff up for grabs..... thanks everyone Last edited by ricm; 05-11-2014 at 05:50 AM. |
#2
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Re: help please - which hydraulic pump
also any help on where to get other bits like tubing, nipples, oil.....?? thanks
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#3
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Re: help please - which hydraulic pump
http://www.wtbcar.com/shopping/index...h=20_27&page=1
They have a hydraulik system dont know if the run on 12v or 7.2v I do know that a Leimbach pump is also made to 7.2v on order also for telescopic http://www.leimbach-modellbau.de/ |
#4
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Re: help please - which hydraulic pump
I am using the pump setup in the wtb link. Works well at 7.2 and 12 volt. I haven't decided what to run the truck I'm building on for voltage yet. I have two 3/4" od rams about 8" long running off of it for my wife's dump truck. I had to limit speed of pump to get a realistic rate of movement. I will be posting the build once done far enough.
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#5
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Re: help please - which hydraulic pump
thanks guys, that's a great help. I'll start with Leimbach as their pump has integrated pressure relief and oil tank which would make for an easier installation between the trailer chassis rails
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#6
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Re: help please - which hydraulic pump
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Jason |
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Re: help please - which hydraulic pump
Quote:
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Thanks for looking. All comments, suggestions, and constructive criticism are appreciated. Dave |
#8
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Re: help please - which hydraulic pump
Im 99% positive there were a few 30" long trailers around that have used the UMS pumps with Scale Art cylinders. These pumps come with the motor attached already.
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Jason |
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