IRstuff,
I recognise... discussions for hours, and at the end, there was absolutely no need to. Unfortunately, the opposite also happens. Everybody knows that little detail that just stayed under the radar of everybody, and caused so much trouble afterwards...
Talking about bladders... we have...
Hi Guys,
Lafuite, great idea!! How it is possible that we (here in the company) did not find that idea anywhere on the internet, or that no supplier came up with that? Cleaning + smaller orifice, great start, thanks! (Little bit afraid of breaking and losing it into the hydraulics, so last...
Hi Lafuite,
Thanks! Good approach, (new to us) however the idea needs further overthinking: in the test we did, only the flow in the helicoid of the M9 thread was already too high. Some rough calculations showed we need an orifice of 0,05 mm - 0,1 mm max, and a few tenth's in series... To...
Hi Lafuite,
Sorry, I (we ) do not understand "With a triangular file or a machine tool make a groove parallel to the axis at 60 °. Then with a small diameter wire (taken from an electric cable and measured) and a nut you can control the passage section." We would be really appreciate if you can...
Hi Brian,
Nobody can't be trusted to follow procedures: If everybody did what would be (legally) required, no accidents would happen. In fact, safety systems would be redundant... Thing is people will make mistakes, whatever you do. Make a bend in a road, install speed limits, flashing lights...
Hi Brian,
Ok, thanks, that is an escape route... Only problem is that in some (simple hydraulic) systems we will have to introduce electricity to function now, just to close a valve... Stuff to discuss, i'm quite sure...
One thing was intriguing: you said that molecules block very narrow...
Hi LittleInch,
The scope is to find a passive solution, so without batteries or electronics (batteries die or need to be recharged, electronics fail or can be passed - we do not want to introduce parts which require maintenance or special care because that are reasons to leave them out). If...
Hi Brian,
Whatever you do, when there is a instruction that says to do something manually, sooner or later somebody will forget, it is just a matter of time. ( And that doe not mean the person is lazy, or careless, it is a human, and he can have a bad day, and humans just forget)
In a...
Zeusfaber,
No, we are looking for a device that reliefs the pressure very slow. It is a lab test system, so it operates under supervision, and only short. This time it is a motor test system (with brake), but this is not relevant. We are looking for a standard passive system, that relief the...
Hi 3D Dave,
Yes that was a consideration. In this setup a larger leak is not a problem, but we also have smaller systems ( we are a R&D company, prototype builder) , where the "leak" would influence operation. We want to do this development only once, we try to go for 1 standard solution in all...
Dear gentlemen,
It is in a lab environment. It is a brake system, more important it is a hydraulic circuit, in which a passive relieve (safety) system needs to be build in. The hydraulics are small (in the world of hydraulics). This setup was to test electric motors, but it will eventually used...
It is not an emergency braking system, it is a security for a lab braking system (for the moment).
Point is that it must be a passive and automatic system, so that is without electrical valve and without manual push button. In this case the system will be safe after a few days: even without...
Hi LittleInch
By a pump 1 liter/min,
Relieving the gas is not possible because it is an diaphragm accumulator 300 ml (completely closed, no afterfill possible).
Flowrate is as in title 500lm/24hr up to 500ml/144 hr, that is 0,045 l/hr or 0,0007 l/min. Less would be also ok :-)
Thanks for the answers!
73lafuite: when you say "very small rates like this", do you mean the rate i'm asking, or the 45ml/min you mentioned?
Tugboat; no, the flow does not need to be constant, but i'm looking for a passive system, so without electrical controlled valve. But it is still an...
In a lab system, the pressure in the accumulator (500 ml) has to be relieved (automatically) in 24-72 hours.
Pressure at the input is nom. 380 bar (and has to drop to 0 bar). The output side is an open container (ie with a lid and diaphragm), so at 0 bar. The high pressure is used for an...
