6 votes

Why are hydraulic systems widely used to multiply force ? won't a couple of gears do the job?

Power density. Modern hydraulic systems are way better compared to ropes and pulleys, gears, electromagnetic systems or levers. Freedom of geometry. Put a cylinder somewhere, get a rubber hose to it, ...
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  • 231
5 votes

Why actuators are mounted in inverted position?

The cylinder will be mounted where it is easiest to get the hydraulic lines to it.
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  • 4,820
4 votes

How to lift an antenna tower into position?

The forces to lift a 100 ft tower from horizontal are going to be enormous. So you will have to build the tower stronger, which will make the forces even larger. For a 100 ft tower erect it once, and ...
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  • 4,820
3 votes

Why are hydraulic systems widely used to multiply force ? won't a couple of gears do the job?

Hydraulics can be used more naturally with engines for servo-like motions (try reversing direction or holding position on a engine driven gear box). Piston must be of precise dimensions without any ...
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  • 3,345
3 votes
Accepted

Can an AC compressor used as a Hydraulic pump?

No, the clearances, compression ratio and valves are not designed for that use. If you want a hydraulic pump then use a power steering pump, now available in two flavours mechanical ie engine or belt ...
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  • 14.1k
2 votes

Can an AC compressor used as a Hydraulic pump?

Air compressors work by compressing air, a gas. Hydraulic pumps work by pumping hydraulic fluid, a liquid, which is not compressible. Attempting to run hydraulic fluid through an air compressor will ...
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  • 8,479
2 votes

Q: Could you siphon an 10 meter tall water column?

Siphons are limited by atmospheric pressure. The exact why of this is a bit complicated, and the statement isn't quite correct, but we are right at the limit. Other factors are the liquid's vapor ...
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  • 4,820
2 votes

Can an AC compressor used as a Hydraulic pump?

I would say definitely not. Pumps like that are designed specifically for their application, and changing the working fluid is not what I would call a minor change. It's possible you could hook it up ...
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  • 451
2 votes

How to lift an antenna tower into position?

Figure 1. This video shows a gin pole arrangement. Source: YouTube. Figure 2. Same arrangement with pull-rope highlighted in blue and recommended guy-ropes on gin pole in yellow. I would be very ...
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  • 8,479
2 votes

Why are hydraulic systems widely used to multiply force ? won't a couple of gears do the job?

Fraxinus answer has covered many valid points (i.e. Power density, Freedom of geometry and cooling/lubrication). Other significant reasons are: Hydraulic systems are simple, safe and economical ...
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1 vote

will a hydraulic gear pump be capable of the same pressure at all speeds?

I think 2 GPM with lowering speed to 1.7 GPM will be OK. In fact, engineer always select next larger capacity when (in most of the case) the equipment is not readily available. For pressure, actually ...
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  • 248
1 vote

Calculate hydraulic cylinder and pump forces on backhoe

The first thing that comes to mind is that hydraulic actuators are better suited for this type of operation, so I would think twice before changing this. For the pressure rating you can get a ball ...
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  • 22.7k
1 vote

How to Calculate Pressure at a Elevated Tank's Tap

An easy way to think of this is to remember that every 10 m of water "head" raises the pressure by about 1 bar (= 1 atmoshpere). The other point to remember is that pressure difference is ...
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  • 8,479
1 vote

Why are hydraulic systems widely used to multiply force ? won't a couple of gears do the job?

"Can transfer force through long curved paths" - this part can in principle be done with cables, which is the technology that was used for construction equipment before hydraulics. ...
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  • 1,367
1 vote

Why are hydraulic systems widely used to multiply force ? won't a couple of gears do the job?

Obvious reason it that the hydraulic system can be in many separate locations and provide power. Think of a JCB arm with 2 or 3 joints and trying to connect gears with shafts for that strength and ...
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1 vote

Mathematical model of an hydraulic jack

There are two pistons, which one are you referring to? Downstroke of left piston will cause fluid to make right hand piston to rise by the volume of fluid displaced. Upstroke of left piston will draw ...
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  • 14.1k
1 vote

Is a Tesla Valve a good fit for this requirement (prevent heavy load accidentally crashing downard but less restriction otherwise)

https://www.chemicalprocessing.com/blogs/chemical-reaction/100-year-old-tesla-valve-is-cool-but-not-well-suited-for-industry/ According to this article , the tesla valve fails during high pressure and ...
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1 vote

Everyday examples of hydraulic pressure drop generating heat

That's not going to work. The same flow that should run buy so fast to create heat by friction will take away any heat on the surface of the pipe, even so fast, that instant water heaters use this ...
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  • 21.1k
1 vote

Why actuators are mounted in inverted position?

Piping: Flexible is used where needed - to accommodate joints and movement. Fixed pipes are used as they are cheaper and also need to have less fixings per length. As for “inverted” which of those is ...
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  • 14.1k
1 vote

Resistive divider hydraulics analogy, is this true?

With laminar flow (and some other assumptions like fully developed flow, everything at equilibrium, newtonian fluids, and uniform viscosity throughout the system), then Poiseuille's law applies and ...
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