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Construction Equipment Tech Hydraulics, Electronics, General Engineering, ect in constr equip |
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#1
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Hey all; was just wondering if someone could explain to me in lay man terms how a hydraulic valve works. I'm going to try to make a budget one down the road and I think I have all of it figured out except the valve part aka the thing that governs the back and forwards motion.
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#2
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There are a lot of different types of valves out there so its hard to answer your question simply, but here are a couple videos which show valves.
Close center spool valve https://www.youtube.com/watch?v=vY_bguSNgSc Rotary valve (not the best animation but might help) https://www.youtube.com/watch?v=th_eOkTh9yE Basically you are opening one port exit to the pressure from the pump while connecting the other port to the return to the tank. A spool valve does this by sliding the 'lands' (bigger parts) back and forth and a rotary valve does it by turning the cutouts so they line up with the ports. Hope this helps...
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Brian Finster shavin' and smokin' a cigar?!?! |
#3
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Yeah. Im kinda stumped about when one port opens to push it forward, what kind of wiring makes the other port close, or go back to the return tank
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#4
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I remember seeing a control valve sliced in half to show exactly how porting looks inside when I was in trade school.
Do you have a college or trade school type place in your neighbourhood? I'm sure they'd have some cut open components to help show how they work? |
#5
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My stuff use plug type valves. I went to the local Princess Auto and bought a really cheap 3 way air valve and took it apart so that I could see it first hand. I was bad after that and took it back to the store...https://www.google.ca/url?sa=t&rct=j...gEHpI6_JXYupyw I'm sure you could find something like this at any similar store.
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#6
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#7
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Haha, no prob! (: We don't have any trade schools very close to here, but I'll look around
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#8
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Bump?
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#9
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Do a YouTube search. Plenty of videos explaining how they function.
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#10
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One have the 'axial slide' valve, the most common in 1:1, and the 'rotate valve', most common in scale modelling. To find out how the valve are put together is not that big problem (google/youtube) but to make one at home that holds on to any pressure is the challenge. To have good success, miniature O-rings often are to be added in the correct locations in the valve, which most of the German miniature hydraulic producers have realized, but the chineese are struggling a bit more, as some extra O-rings will ad some cent's to the production cost it seams..or whatever. Maggom newest valveblocks and pumps seams to work okay, at a relative reasonable price..as your possible 'plan B'
Last edited by Rimrock; 01-26-2016 at 08:01 AM. |
#11
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Cool. Thanks! (:
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#12
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Finster: OH MY GOD--that's SO genius!!!
Thank you!!! |
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