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Hydraulics
Due to its immense power, hydraulics are used for operating various machinery, vehicles, aircraft, ships and equipment. The data and engineering revolving around hydraulics is so vast, its hard to comprehend.
1,856 Questions
What are some everyday household items that operate by hydraulic pressure?
some examples of a hydraulic system of your house old items is a gun turret
How many types of hydraulic filters are there?
3 to 4 depending on the type of machinery. There is a suction filter, return filter, and a pressure filter mainly, but in some cases, off-line fiter can be incorporated
What type of hydraulic fluid does a John Deere 950 use?
Transmission Oil Low Viscosity HY-GARD® (JDM J20D)
What kind of hydraulic fluid does a Bobcat T190 use?
i found that the t190 uses hydrostatic hyd oil
further research found that transmission fluids are hydrostatic which means you can use either a tractor trans oil or even a torque oil 50 also high temp hyd 100 is also used
What type of hydraulic oil is used in Massey Ferguson 245 tractor?
what kind of hydraulic oil should be used for a massey furguson 245
Hydraulic fluid capacity on a 1999 ford 555e backhoe?
The book says the intire hydraulic system holds 36 gallons and the tank holds 28 gallons. This is from the manual of a 1998 555E I purchased.
Short Answer:
A hydraulic press is a means of generating mechanical advantage by using a fluid and two different sized pistons. Hydraulic presses can be used for a lot of things. In a shop it is often used to press metal pins into holes or bearings into housings so that metal parts can be made to stay together without fasteners or threads. In a lab hydraulic presses are often used to compress powders into solid cylinders or tablets. Sticks of chalk used on blackboards are made this way as well as aspirin tablets and other common products. Hydraulic presses can be run manually using the power of someone's arm or they can use an electric pump to create the necessary pressure in the hydraulic fluid.
How it works:
If I have a piston that is three inches in diameter sitting in a cylinder and I pump fluid in the bottom of it that piston will rise and lift whatever is above it such as a 2000 pound car. The pressure of the 2000 pound car on a three inch diameter piston produces about 261 pounds per square inch of pressure in the fluid below the piston.
Piston Area = Pi*r^2 = 3.14 * 1.5 * 1.5 = 7.65 square inches
Pressure = Force / Area = 2000 pounds / 7.65 square inches = 261 pounds per square inch
If I have a pump with a piston that is only 0.25 inches in diameter (area = 3.14 * 0.125^2 = 0.049 square inches) I only need to push on it with about 98 lbs to lift a 2000 lb car.
This works out to about a 20:1 mechanical advantage. The downside is that for every inch I want to raise the car I have to push the small piston in about 20 inches. This is how a hydraulic jack or "bottle jack" you'd find in a garage works.
A practical jack or hydraulic press would have three valves and a fluid reservoir in addition to the pump and lifting piston. The pump would push fluid through a check valve, which only allows fluid to through one way, into the lifting piston cylinder causing it to rise when the handle is pressed down. When the handle is lifted the pump would suck fluid from the reservoir through another check valve. This lets you move the pump back and forth to get 20 inches or more of motion without having a 20 inch long pump piston. The third valve would let the pressurized fluid back into the reservoir when you wanted to lower the car. The reservoir would not be pressurized.
Hydraulic oil is very thin and will leak if it gets a chance. It does not burn out but after several hundred hours it may start to disappear Your transmission oil might leak into the engine or the rear end due to bad seals, however you have to determine how much oil you are using over what period of time. you will use some oil thru normal running conditions ,but not very much.
How does a hydraulic device work?
a hydraulic system multiplies a force by applying the force to a small surface area.the increase in pressure is then transmitted to another part of a confined fluid, which pushes on a larger surface area
What advantages has closed loop hydraulic systems over open loop hydraulic systems?
A closed loop system does not permit the escape or waste of the working fluid.
open system:
A bucket of water with a hole in the bottom that allows a stream of water to fall upon the blades of a turbine and spin it, performing work, can be considered an open system because the water, the working fluid, is not captured and recirculated for re-use but allowed to fall on the ground and drain away.
(I have ignored possible return methods such as the earth's weather system, city storm drains, wells and manpower, and the water utility for this example)
A better example might be that of a jet aircraft engine. The fuel is burned to create hot pressurized gas, which is the working fluid. The working fluid expands through the engine's turbine, turning it and producing work. The working fluid is not recovered, but thrown away into the air.
closed system:
The hydraulic system that lifts the bed of a dump truck and the power steering system in a car are both closed systems because in each one the working fluid is returned to a closed tank for re-use after it has been used to perform work.
What came first Hydraulic elevator or roped elevator?
Roped (traction) elevators came first. Otis Elevator Company invented the modern elevator in 1853 which used ropes. Otis Elevator Company then also invented the first hydraulic elevator which was installed in 1909 at the Singer Building in New York City (since demolished).
Is hydraulic fluid for a jack different from hydraulic brake fluid in a car?
Yes, they are different.
Brake fluid will eat the jack seals. Some people might suggest transmission fluid or motor oil, but there's really no need -- hydraulic jack oil is inexpensive and easily available at many tool, hardware, and auto parts stores. And it's supposed to keep seals in the best possible condition. Here are a few part numbers you can search for:
GUNK 4KTN1 Hydraulic Jack Oil, 12 Oz
Gold Eagle Heavy Duty Jack Oil - JF16
"Ace" Hydraulic Jack Oil (at Ace Hardware Stores).
As of this writing in mid 2010, a 12 oz bottle is about $4.
How do you make a wooden sash window?
A wooden sash window is subject to harsh conditions and requires a high level of skill to make and to fit to the frame. There are a number of diagrams and a description of window sash and how to fit them in the Audels Builders and Carpenters guide.
What is an hydraulic accumulator?
In mobile hydraulics, those used in agricultural, industrial, and automotive applications a hydraulic accumulator works like a shock absorber for a hydraulic system. Often a hydraulic accumulator is composed of a housing with a diaphragm between the oil side and the gas side. Pressurized gas (usually dry nitrogen because of its low expansion/contraction properties in relationship to temperature). The accumulator will have a specification for the gas pressure and the hydraulic system can often be used to manipulate the pressure of the oil used in the accumulator depending upon a specific application.
Rapid increases and decreases for hydraulic power demands (most often occurring in open-center systems) can shock the hydraulic pump, lines and valves. Open-center positive-displacement systems (constantly providing hydraulic flow while the engine is running) must return to sump when there is no hydraulic need. This is done by use of a relief valve or a 'dump'-valve on the pressure side of the system. There are moments when the relief valve may have a very slight delay. This delay can cause the system to build pressure in a very short period of time and this can strain hydraulic components. So the accumulator it used to soften the blow just a little. Another example would be when using a float application with a hydraulic system, an accumulator may help to buffer the changing oil directions within the hydraulic system.
What make petroleum oil suitable as a hydraulic fluid?
Oil transmits power readily because it is minimally compressible, Lubrication abilities and the cooling properties.
What is hydraulic civilization theory?
cities that controlled irrigated farmlands over surrounding areas could hold power over others -- they used food and hunger as a weapon. i.e. Babylon on the Euphrates.
WhatType of hydraulic oil for hydraulic jacks?
Hydraulic jack oil
Available at auto parts store or Wal-Mart
Use AW68 grade hydraulic oil
How do you calculate the volume of hydraulic oil in any hydraulic circuit?
calculate the no of pipes in the circuit & then work out the volume based on the area.
