A hydraulic jack is a commonly used tool in industrial applications and projects. Migrcraft, as an international hydraulic tool brand, has partnered with the best research and development systems to bring the best quality hydraulic jack system to the industry. This article is for the proper classification and the working procedures of hydraulic jacks. It lets customers know more about this product and choose what hydraulic jack is helpful for specific purposes and the precautions necessary when it's in use.
The history of hydraulics Technology
Humanity has been utilizing fluids as a source of energy for many years. From the early days of using water to turn farm mills to the complex modern-day fluid power we find in construction equipment, our ability to harness fluid energy has improved rapidly. We now use fluid power in our aptly named hydraulics. These ingenious designs use pressurized fluids to galvanize energy into pure force. But how did hydraulics ever come to fruition?
It took a true genius to realize the potential that confined fluids had. In 1648, Blaise Pascal (the unit of pressure's namesake) discovered that fluids exerted an equal force in every direction. He claimed that it would be one day possible to channel the energies of the liquid to our advantage. It eventually happened.
In 1738, a Swiss mathematician called Daniel Bernoulli put this theory into practice. He used pressurized water in mills and pumps. Then in 1975, an Englishman named Joseph Bramah patented the first hydraulic press. The hydraulic press formed the foundations of the industrial revolution and allowed the production of machines to cut or stamp things, as well as cranes and printing presses to name but a few.
Eventually, it was realized that simple H2O wasn't the best liquid for hydraulics and that oil was a far better choice. The oil was less susceptible to evaporation and held its temperature more readily than water. A non-corrosive, dense oil could perform to a greater degree and create more power without corroding the machine.
As time went on, from the industrial revolution to the present day, the use of hydraulics became increasingly widespread, meaning that innovations in technology became exponentially faster. New materials were used in new internal designs, creating greater forces and generating more power, allowing faster production.
Hydraulics can give more than 10x the power of an electric motor, meaning it is more effective at lifting heavy objects and forcing things to move. Hydraulics can be controlled safely and precisely and are closed off, protecting workers. For this reason, they are prevalent.
In the present day, hydraulic cylinders are used heavily in construction. Mining, drilling, shipping and manufacturing workers all use tailored hydraulic cylinders to aid them in their vocation.
Proper classification and use of hydraulic jacks
Hydraulic transmission systems and technology are more than 300 years old. The discovery of this hydraulic technology led to its wide use in cranes and construction machinery in the last century. The military has been using this technology for a long time, and it started penetrating the civilian industry after the end of the world wars.
Hydraulic technology is so popular because the hydraulic transmission device is very light, has low inertia, high power, high efficiency, low noise, and is very durable.
So this hydraulic technology is used in many types of equipment, including the jack. The jack was originally an elementary lifting equipment, which is generally used in factories and mines. When the vehicle is repaired, the most common one is used to prop up the vehicle for easy maintenance, which is the jack's credit.
Hydraulic jacks are relatively extensive because they are very stable in work, compact in structure, and have a self-locking effect, so they are more popular.
The only disadvantage is that the lifting speed is relatively slow, and the lifting height is limited.
Now the hydraulic jacks on the market are also divided into two types: professional hydraulic jacks and general hydraulic jacks.
Generally, special hydraulic jacks are used for special equipment, and special hydraulic jacks are double-acting.
With the progress of the times, the development of various technologies, and the technology of various equipment are also changing, this hydraulic technology is gradually becoming perfect, and the shortcomings of hydraulic jacks are believed to be improved.
The working principle of hydraulic jack
Jacks are divided into mechanical and hydraulic jacks, and the principles differ.
The principle on which hydraulic jacks are based is Pascal's principle.
That is, the pressure of the liquid is the same everywhere. The pressure exerted on the smaller piston is relatively tiny in a balanced system. The pressure exerted on the large piston is enormous, which can keep the liquid stationery.
Therefore, through the transmission of the liquid, different pressures on different ends can be obtained so that they can achieve a transformation purpose.
The hydraulic jacks we see commonly use this principle to achieve force transmission.
The mechanical jack adopts the mechanical principle, the handle is pulled back and forth, and the claw is pulled out to push the ratchet gap to rotate. The small bevel gear drives the big bevel gear and turns the lifting screw so that the lifting sleeve can be lifted or lowered to achieve lifting and pulling force. But more complex than a hydraulic jack.
Preparations before using the hydraulic jack
Before using the hydraulic jack, you need to do some preparatory work; otherwise, the hydraulic jack will not be used correctly, resulting in low work efficiency and other problems.
So what are the preparations for hydraulic jacks before use? The following are four points of preparation for hydraulic jacks summarized by TorcStark.
Choosing a hydraulic jack with suitable tonnage is necessary when lifting with the hydraulic jack. The bearing capacity should be manageable, and the bearing capacity of the hydraulic jack should be greater than 1.2 times the gravity of the heavy object. The minimum height of the hydraulic jack is appropriate. The minimum height of the hydraulic jack should be adapted to the clearance at the bottom of the heavy object if an object has to be moved quickly. When the sleepers are used to support heavy objects during the lifting and landing process, the lifting height of the hydraulic jack should be greater than the sum of the sleepers' thickness and the sleepers' deformation.
If multiple hydraulic jacks are used to lift the same equipment, the same type of hydraulic jacks should be selected, and the sum of the rated lifting weights of each hydraulic jack should not be less than 1.5 times the gravity of the equipment it undertakes.
Hydraulic jacks should be cleaned before use, and each part should be checked for flexibility and damage. Do not remove the quick connector when loaded to avoid accidents and damage to parts. This hydraulic puller should also be highly valued before use.
The position where the heavy object is lifted must be a safe and solid place to prevent damage to the equipment. The hydraulic jack should be placed flat before use, not inclined, and the bottom should be flat. Strictly prevent the hydraulic jack from tilting or overturning due to the subsidence of the foundation or the offset of the load, and a rugged pillow or steel plate can be placed at the bottom of the hydraulic jack to expand the pressure-bearing area to avoid accidents from falling or sliding. Do not use oily boards or steel plates as pads to prevent slippage and safety accidents when under force.
Precautions for the use of hydraulic jacks
The hydraulic jack cannot be eccentric or overloaded to prevent the jack from being damaged and causing an accident. When there is a load, keep the quick connector to avoid accidents.
Hydraulic jacks use oil as the medium, and we must do maintenance of oil and hydraulic jacks, as well, to avoid blockage or oil leakage, which will affect the use results.
For new or long-standing hydraulic jacks, the piston rod may show a small sudden jump because there is a lot of air in the oil cylinder when starting to use. The hydraulic jack can be reciprocated 2-3 times with no load to remove the air in the cavity.
Maintenance of hydraulic jacks:
How to refuel or change hydraulic oil?
Put the jack in a vertical position, and the pump core and the piston are lowered to the lowest point.
Remove the rubber oil plug on the jacket and inject the cleaned hydraulic oil into the piston port.
Regularly check and lubricate the transmission connecting rod. If it is not in use, users should remove the piston rod, adjusting the screw and pump core to ensure that the connecting rod is clean and rust-proof.
Summarize
The above article introduces hydraulic jacks' history, classification, use, working principle, and precautions. Please contact us if you have any other questions or need to buy hydraulic jacks.