Find the leakage
Find the leakage
(OP)
Hello Guys,
We have a problem with the machine. The pump mentioned in the scheme position 112 doesn't give pressure to the other manifolds. We tried to close the pump delivery and the pressure was around 180 bar, which means the pump is ok and probably there is some leakage in one of the manifolds. What is the quickest way to find out the leak without having to check and every component? Is there a way. Sorry I am a software guy with a passion to learn hydraulics. Also, what is the use of the second compensator in the diagram. Generally only is pressure and the other is load sense, but here but looks the same. Can some on explain me. please
We have a problem with the machine. The pump mentioned in the scheme position 112 doesn't give pressure to the other manifolds. We tried to close the pump delivery and the pressure was around 180 bar, which means the pump is ok and probably there is some leakage in one of the manifolds. What is the quickest way to find out the leak without having to check and every component? Is there a way. Sorry I am a software guy with a passion to learn hydraulics. Also, what is the use of the second compensator in the diagram. Generally only is pressure and the other is load sense, but here but looks the same. Can some on explain me. please
RE: Find the leakage
Rich
PRA
RE: Find the leakage
That pump is smaller than the rest.
You need to describe the machine and the operation much better, but if there is a leak then you need to go find it by a person looking for the oil spurting out somewhere.
Remember - More details = better answers
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RE: Find the leakage
It's not really clear what valve you operated when you "closed the pump delivery" - that would be useful to know.
Can you see whether the pump is on stroke? Knowing whether it is delivering lots of flow but with that flow not developing pressure, or simply not delivering flow (because the compensator is holding it off-stroke) would help you narrow the problem down.
Is the solenoid on the valve at EV11 energising (test with a solenoid pen, not just with a voltmeter)?
If I was on-site and not in the mood for thinking too hard, I'd probably pull the orifice at position 122 out and check it isn't blocked before doing much else. Lazy, but surprisingly often successful.
If the pump is on stroke, then have a check round the manifolds fed by that pump and check whether anything is unusually noisy or hot.
@LittleInch. The problem with hydraulic systems is that they sometimes provide opportunities for oil to leak across valves from a pressure to a return line. Relief valves and actuator piston seals are prime sites for this - and when it happens, it's all internal - there's nothing visible.
A.
RE: Find the leakage
To detect an internal leak on a noisy installation, here is what I do:
I let the machine run without cycling for a long time. With obviously in the state of cycle which has the defect. If needed 30mn to 2h. And I'm going to drink a beer .... Then I take an infrared thermometer and I know where the hot oil is going. You should know that each time the pressure drops by 100bar in a component without providing mechanical energy: its temperature increases by 5.5 ° C.
Good luck
RE: Find the leakage
I can work myself around a P&ID pretty well by now, but fluid / hydraulic diagrams are still utter spaghetti....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Find the leakage
RE: Find the leakage
RE: Find the leakage
Some of them are like that, but not all. Most of the types I've worked with are positioned solely by hydraulics, but have a dedicated servo pump - either integral or running off the same shaft - to provide the power to do that.
A.
RE: Find the leakage
Usually these pumps are bi-directional and most commonly used in closed loop hydrostatic drives for mobile equipment
RE: Find the leakage
RE: Find the leakage
My conclusion: Forums can help me learn new things, but I am disgusted by the rudeness of seekers. I won't help anyone anymore.
RE: Find the leakage
RE: Find the leakage
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.