Hydraulics

by using a non-compressible fluid, it acts like a solid push-rod.

Barber chairs are often raised and lowered using gas or hydraulic struts. These struts work by using strong springs or pressurized gas. Some of these devices can be recharged, or have replaceable seals, but others are disposable items that are replaced as a unit.

IS : 2062 - Specification of Steel for General Structural Purposes

CHEMICAL COMPOSITION

Grade C% Max. Mn% Max. S% Max. P% Max. Si% Max. C.E.% Max.

A 0.23 1.50 0.050 0.050 0.40 0.42

B 0.22 1.50 0.045 0.045 0.40 0.41

C 0.20 1.50 0.040 0.040 0.40 0.39

MECHANICAL PROPORTIES

Grade UTS(MPa) Min. Y.S.(MPa) Min. El.% Min. 5.65 Sqrt(So)

Bend

Test

A 410 250 240 230 23 3T

B 410 250 240 230 23 2T & 3T *

C 410 250 240 230 23 2T

* 2T - <= 25mm

* 3T - > 25mm

Static Hook Load:

The static hook load is the maximum weight in static conditions (not tripping) that the derrick/mast and the substructure can withstand.

For instance in a stuck pipe situation, if a derrick is able to pull up to 1,000 Klb before failure, then its SHL will be 1,000 Klb (not considering safety margins). This value has nothing to do with the power of the rig, which is determined by the power of the drawwork.

To calculate the static load that the derrick/mast and the substructure will withstand, it is needed to find the heaviest load in AIR, and it can be either casing or drilling string, in most cases it will be the casing string, unless small holes are being drilled.

SHL = (HAS + TB + MO) * 1.25

SHL…Static Hook Load (lb)

HAS…Heaviest String in Air (lb)

TB…Traveling Block (lb)

MO…Margin of Overpull (lb)

The flow of oil in an hydraulic system can be compaired to any water system; in both systems you will find the tank (place where the liquid is store), the conduits or channels through which the liquid will travel (pipes), the pump (to impulse the liquid through long distances or to de a job such as filling a cylinder (piston) or pushing hot or cold water through an air conditioning system in a building, filters (to ensure purity of the liquid), and finally you may have temperature controls. The oil characteristics of a hydraulic system are such that permits the oil to perform amazing work such as keeping a building structure level (this is the case at the outshore airport of Tokyo, which keeps sinking into the see bed and by means of hydraulic systems they turn the support of the structure hydraulic jacks as needed to keep the whole airport level.

The brakes in any car is another example of a hydraulic system where the flow of oil impulse by the brake pedal and or the ABS pump will force the pads of the brakes grab the wheel discs hindering the wheels from turning.

The power steering in any car is another example of oil flowing trough pipes to help the driver turn the car around.

1. car fuel pump 2. excavator 3. human heart

travel jack hydraulic type with 50 metric tonnes capacity - specification

you can but you'll be buying a new one very shortly afterwards. Use hydraulic fluid. Brake fluid works well also

they are used when a heavy weight has to be lifted, for example, when a car is lifted in a garage so that the mechanic can see the bottom of the car. they can also be used in mountain bikes and car brakes use hydraulics.

Force is equal to pressure times area. By increasing the area of the output force, the force goes way up. This is because water cannot be compressed, and therefore the pressure cannot change. In this way, a hydraulic device works almost like a lever. It increases the area of the output force and therefore decreases the amount of input force needed.

Can you tell that sameone is agreing with you

Normally this is not an option as single phase and three phase motors are built differently it is also very dangerous to try hooking it up this way. You can try taking it to a motor shop and having it rebuilt but the costs associated are really not worth it and most "reputable" motor repair shops will not attempt this. It will be cheaper and cause less problems to just purchase the correct motor for the application. Trying to retrofit anything to something other than its intended purpose is hard, expensive, and dangerous. So once again I would not attempt this.

If the hoses ("tubes") expand, the pressure available at the working device will be lower, reducing the force available. Also, if the hoses are moving around because they are flexible, they are more likely to get worn or damaged.

The brakes in my car are hydraulic.

a solid would simply generates friction much higher than liquids

These days that's no longer always the case. It used to be because as the rail warmed up in the sun it got longer, so gaps was left for the rail to have something to expand into. w/o the gapsor with too small gaps it happened that the rail broke loose from the sleepers and caused the train to derail. To day many railroads are using concrete sleepers, which are strong enough to keep the rails in place w/o any gaps.

One similarity is that they both use fluids. Both gasses and liquids are fluids. the two are also compressible.

As systems, neither one is better than the other. There is no "Better", only "More suitable for a specific purpose." Car tyres are Pneumatic... they're full of air. Air is compressible, which is why it's used. If you filled your car tyres with Hydraulic fluid (which is incompressible) you would not only increase the weight of the tyres dramatically (and hence increase the relative tread-wear), but also make them hard, decreasing their ability to absorb shock. This would defeat many objects in the design of car tyres! The rams on a digger or crane, however, are Hydraulic. They need to be filled with something that is not compressible in order to fulfill their function. If you were to fill the rams on a digger with air the arm would bounce up & down like a yo-yo! Also, at the pressures required by these systems, air would quickly leak from the seals, no matter how tight they were. Hydraulic fluid, being far more viscous than air, however, does not leak under the same conditions. As a rule, Pneumatic systems are employed where a certain amount of "play" or "give" is required, or where the loss of fluid would be undesirable (Air power-tools for example) Hydraulic systems are used when extremely great pressure is needed in order to move something. Hydraulic systems are also easier to control & regulate due to their ability to retain pressure indefinitely. There are many uses for both Hydraulic and Pneumatic systems but because both types have specific roles, there is no saying that one system is better than the other.

Normally using a calibrated bellows or bourdon tube. As pressure is sensed by the device it inflates the tube or bellow which in turn causes the needle to rotate.

Pre-seventies pitot and static systems on aircraft use this very technology to relay information like true air speed to the pilots.

Pneumatic systems use air or an inert gas. Hydraulic systems use water or oil.

It consist of
1.a cylinder with a piston
2.piston rod,connecting rod
3.crank and crank shaft
4.delivery pipe
5.suction pipe
6.delivery valve
7.suction pipe with a foot and filter
During suction stroke the piston moves to the left, causing the inlet valve to open.
 Water is admitted into the cylinder through the inlet valve.
 During the discharge stroke the piston moves to the right closes the suction valve and opens the out let valve.
 Through the outlet valve the volume of liquid moved out of the cylinder.