Not enough information. I don't understand what you mean by "series parallel" when there are only two motors in the picture? Are you trying to operate in parallel when the lever is depressed one way and series when depressed the other? And what is the logic of the spool in the control valve? ISZ
Another thing to consider is how long will the system be active? You don't mention if this has to be running indefinitely but you will see some systems with little to no cooling. In some cases they are meant to run intermittently and there is sufficient thermal mass that they can run long enough...
Peter Nachtwey convers this topic in many of his articles. (see www.powermotiontech.com) He recommends that the actuator natural frequency should be 3-4x the frequency of acceleration for sine waves. Larger piston area is the easiest way to increase the natural frequency. If the valves aren't...
One option is thermal mass like rock, depending on how cool it gets at night. Could make a bed of rock with a tube running thru the middle that pulls night air thru it to cool it down. Then during the day it will absorb heat from inside the grow box. Depending on how complicated you are willing...
I seem to remember that gear-type flow dividers can in certain instances turn into pressure intensifiers. I can't remember the specifics though and its too late for me to look into it.
And a purely mechanical option is what they use to lift buildings. I have never seen a detailed drawing but...
My first thought is pack it full of grease to keep the water out, but where would it go next? Would have to better understand the system and how it goes together. And reliance on inspection is not a good solution because most people won't do it.
I'll put on my reliability hat and say that this...
You will be increasing torque by ~50%. No idea if the gears can handle this, depends on your duty cycle and gear safety factor. Even if you don't break them you could get into pitting, which may be offset by using a thicker/better lube. And high power will create more gearbox heat.
Also need...
I hadn't thought of the roller clutch idea, think that has some merit. I see some built to handle the requisite power level but they don't list the backlash, have to call the vendor. Also have to ask about the shock load capability. ISZ
TugboatEng "I don't understand fully what is trying to be achieved here...."
The machine system being developed has 40-50° of backlash which can not be reasonably reduced (3 planetary stages, 1 big spur gear stage), and the system constantly changes speed and direction when in use by the...
I'm looking at the feasibility of a lab set-up that would replicate two different systems to help develop our controls. The main issue I have is backlash between the motor under test and the dyne. It has a significant impact on our controls and must be accounted for in the lab rigs. Ideally it...
"Because of the difference in the stress cycle curves for pitting and bending, the effective load for pitting and bending will be different. Thus, it is difficult to predict the mode of failure without the complete analysis of the duty cycle as indicated. Therefore, if the shape or magnitude of...
Agree with dgallup. Full syn group 4 is going to have the best viscosity index - i.e. least change in viscosity due to temperature changes. Dino is usually the worst, not to mention it is much more prone to oxidation. Just part of the reason I run group 4 in my personal vehicles which see -10°F...
Late in responding, but I'll throw in my 2 cents.
Part of your decision has to do with how long this has to last. When I worked for CaseIH we sometimes just used plain bearings because the machine only has to run a couple weeks a year for maybe 10 years, and farmers are usually good about...
You have to remember that many forklifts are operated in freezers, which is why they called out ATF as an option. Like GruntGuru said the high VI offers better cold temperature operation. If you are just running this rig periodically and it will never really get warm I would go with VG32 or...
We use external proportional pressure reducing valves to directly control the pressure of our six Rexroth pump system. Admittedly not a cheap option, but we don't have interactions and we can adjust the pressure on the fly. ISZ
I read an article in a transmission repair magazine recently that said you need six different fluids to cover some 90% of cars on the road right now and they expected that to increase in the future. ISZ
I used to work for the big red company in implements, specifically the test side. I can tell you that most of the basic information you are asking for was learned thru blood, sweat and tears. The actual loads are going to vary wildly depending on the soil type, compaction, moisture, specific...
