One instance would be when space is a criteria, on an aircraft for instance.
There is no opposite. Hydraulic refers to liquid; an alternative would be "pneumatic,' which refers to gas.
Pneumatic = Air! There are brake systems that use a combination of both pneumatic and hydraulic components. In those combination braking systems you would use the hydraulic brake fluid that the manufacture specifies.
By removing the air cylinders and replacing them with hydraulic ones which are usually much smaller. Of course all the control valves and pipework would need to be also changed and a hydraulic power pack (tank, pump and motor) would be needed to replace the compressor that was providing the air. A air-to-hydaulic actuator could also provide the power.
No. There are a few reasons why a pneumatic control valve can not be used with hydraulics applications. Firstly, pneumatic seals are incompatible to the chemical properties of hydraulic oils and they do not have the strength to accommodate the high pressures produced by a hydraulic system. Secondly, pneumatic valves are not designed for high pressure operation and the component would get damaged, burst or crack. Finally, the tolerances within pneumatic components would allow by-passing due to the slacker tolerances compared to hydraulic components. By-passing causes all sorts of problems by itself: Over-heating, leaking, internal structure damage of the component.
Yes there is. Pneumatic valve springs. They are metal bellows that have air in them. Their use is in replacing metal wire springs in a high-speed combustion engine. An example would be formula one engines.
If it is frothing or turning buddly it has air entering the system causing the hydraulic to turn into a pneumatic. Check you system for any cracks or leaks, and replace your o-rings.
not quite, it depends on the pressure of system, but hydraulic tends to be high or could be very high pressure, and pneumatic is often lower pressure. the low grade rated pressure hose/ pipe would fail and burst/ causing injury.
Pneumatic systems are inherently more dangerous than hydraulic systems at the same pressures. Most states have laws governing the construction of compressed air systems for just this reason. The ASME Code section 8 specifies rules for construction of air tanks (unfired pressure vessels). There are less regulations on constructing hydraulic systems. An overpressure on an air tank could result in the explosive destruction of the tank, whereas a cracked hydraulic tank would result in just a leak.
No, a hydraulic hoist would not work as well with air instead of fluid. Hydraulic systems rely on the incompressibility of liquids to transfer pressure and lift heavy loads. The compressibility of air would reduce the system's efficiency and lifting capacity.
Almost anything that would be considered a robot has the following basic elements:A moveable body -- Robots may have wheels, limbs connected by mechanical joints, or other types of moveable segments.An actuator -- In order to be activated, robots may use an electric motor, a hydraulic system, a pneumatic system or a combination of all three.A power source -- A robot needs a power source to drive its actuators. Electric robots use batteries or extension cord. Hydraulic robots need pumps to pressurize the hydraulic fluid, and pneumatic robots need air compressors.An electrical circuit -- The electrical circuit powers the electric motor, solenoid or valves that control hydraulic or pneumatic systems.A reprogrammable brain (computer) -- The computer controls all other components. In order to change the robot's behavior, you just have to reprogram the computer.A sensory system -- Some robots have the ability to collect information about their environment and react to it.not written by me but found
The main danger is the pent up power of compressed air. If the tie rods on an air cylinder fail the end would fly off at some terrific speed whereas with an hydraulic cylinder as soon as the end came off the pressure would be gone even though it was much higher to start with.
designed for hydraulic jack perhaps power steering fluid would work Brake fluid Ruins pump