Recent content by hydraulicsman

Thanks for your response. Does gas entrainment not have an impact on system stiffness and reponse? Are we presuming the surface is relatively still?

I was thinking more diaphragm or bladder... Thouhgt a piston may have inertia problems... seal stiction etc. Was wondering if there was large entry, small capacity accumulators.

I'm interested to find out more about hydraulic system shock absorbers. We have been performing some tests on a system that is subject to water hammer... by adding a bladder accumulator locally to the nucleus of the induced water hammer we can mitigate it's effects well... however, the limiting...

Has any manufacturer came up with a way to monitor a sytems bulk modulus in real time? Some sort of special sesnor?

Does anybody have examples of a boosted hydraulic system that uses nitrogen applied directly onto the free surface of the oil within the reservoir? the boost is between 3-8bar.

imaginary

If the motor is still rotating when both tests are performed, there will be a difference in flow measurement. before RV = pump output after RV = RV bleed amount If it's stalled then before rv = pump output (presuming fixed disp gear pump) after rv = RV bleed amount i.e pump output - motor...

http://biem.co.kr/hydac/accumulator%20technology/piston%20accumulators.pdf

Good morning, Yes that's correct.

Hello, The forces must equalize for the cylinder to halt retraction. 444482.2N force 3.517MPa to hold Leak in piston seal - Pressure must equalize on both sides now Presuming 35.17bar in FA when po checks seat. Pressure in AA unknown presuming 0 Cylinder Area ratio = 1.04:1 Presuming no leaks...

The fluid draw from the accumulators is constant.

Thanks for the opinions. I feel it may help if I elaborate on the system slightly. Basically the prime movers are cylinders, there is an external force applied to the cylinder to induce a pumping action... the output from the cylinders is controlled by a an algorithm which fires valves to...

I realize it's a kidney loop. It was more just to show ISZ the idea of the filtration media stack. That's the part I am interested in.

Thank you for the suggestions. Regarding the kidney loop idea, although excellent for cleanliness, incorporating a pump into this system to offline filter would be viewed as a parasitic loss. ISZ - Here is a link to a manaufacturer of depth filters - http://www.cjc.dk/products/fine-filters/

Hi, Thanks for the response. Does anyone know how well a depth filter may work in this enviroment? Also Pall do a range of common radial types but with a special layering method for the fibre called Ultipleat. They claim it works better than the normal element style for cyclic regimes. Anyone...