How to find the spring characteristics of a single acting hydraulic cy
How to find the spring characteristics of a single acting hydraulic cy
(OP)
I have a single acting hydraulic cylinder and i have its dimensions, stroke length and i can also measure the hydraulic pressure. Can anybody give some details which experiment will be suitable to determine the spring constant.
Thanks in advance..
Thanks in advance..





RE: How to find the spring characteristics of a single acting hydraulic cy
Mike Halloran
Pembroke Pines, FL, USA
RE: How to find the spring characteristics of a single acting hydraulic cy
RE: How to find the spring characteristics of a single acting hydraulic cy
Ted
RE: How to find the spring characteristics of a single acting hydraulic cy
D=F/(L1-L2) where F is the force which is calculated with pressure and hydraulic cylinder piston and where L1-L2 is the change in length of the spring.
RE: How to find the spring characteristics of a single acting hydraulic cy
That would be the volume of the oil being compressed, the changes in pressure, and the compression of oil and expansion of the hose and cylinder as pressure increases.
I have never worked with a single acting cylinder in that situation, but I would think the principles are the same.
Peter be the man to talk on that topic.
kcj
RE: How to find the spring characteristics of a single acting hydraulic cy
how could I have edited a post rather than reply? k
RE: How to find the spring characteristics of a single acting hydraulic cy
The cylinder and load.
kcj, you need to look at what Jack Johnson wrote about capacitance. The VCCM equation doesn't apply here.
Peter Nachtwey
Delta Computer Systems
http://www.deltamotion.com
RE: How to find the spring characteristics of a single acting hydraulic cy
correct, VCCM are at steady state conditions of speed and load, but his discussions of capacitance and oil volume are what I was referring to. I don't follow some of his applications from natural frequency to calculating gains, but that is my limited math.
I thought OP was asking about the spring rate of oil column, not calculating a mechanical return spring.
kcj
RE: How to find the spring characteristics of a single acting hydraulic cy
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Peter Nachtwey
Delta Computer Systems
http://www.deltamotion.com