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Electricity plays the main role in our day to day life. Without electricity, it is not possible to switch on lights, fans, ACs and any other electronic appliances or devices. In fact, your smartphone or laptop may run on battery but to charge that battery, you will need electricity. In order to provide electricity to every corner of the place, transformers play a crucial role. It ensures uninterrupted and guaranteed power transmission throughout. But to make sure these transformers are working properly, dried and purified oil is needed. With the help of the right and efficient transformer oil dehydration and purification system, you can get what you need.
Why transformer oil purification is required?
During the usage of the transformers, they will require purified oil to absorb the moisture. If the oil is not purified in the right way then the pollution can get sopped into the fibers of the transformer. The pollutants and dirt particles can harm the transformer. During the process of insulation, if the oil is not purified, then the contaminated particles or impurities can cause an issue.
Purification is important for improving the insulation properties of the oil which will also accentuate the cellulose insulation.
Purification of the transformer oil purifier can increase the insulation properties. When the transformer gets better insulation, it will have a longer lifespan. Even the chances of the breakdown will reduce a lot. When your transformer will last for a longer time, you will naturally get better returns on the investment. Also, lesser breakdowns mean uninterrupted supply of power. Thus, oil purification system is required for purifying the transformer oil.
Transformer oil filtration machines use oils for a variety of purposes including cooling and insulating. They are essential parts of any electric unit which uses electricity to power various sources. The oil is used for cooling the various parts of the transformer so that any chance of over heating or short circuiting is eliminated. The oil also helps to insulate various parts of the device where any kind of outside temperatures are negated by the oil. However, the oil inside the transformer tends to break down over time. Fine particles may accumulate inside the oils which can severely affect the life and the functioning of the transformer. This where an oil purifier is used. A mobile transformer oil purifier will help to filter out moisture and sludge from inside the vent systems. It helps to clean the oil from any extra ingredients and keeps it viscous and flowing through the insulating vents.
We all know that centrifuges are an important type of auxiliary equipment on board ships and that they are classified into two operating functions. One is a clarifier, which separates solids from liquids. The other type is an oil purifier, which separates liquids of different density. The Purifier operates on the principle of separation by centrifugal force. But in order to optimize the purification process, certain parameters should be adjusted before the purifier is started. Out of those parameters, very important parameters are:
Feed inlet oil temperature
Density of Oil
RPM of the rotating bowl
Back Pressure
Throughput of oil feed
Understanding the Parameters
1. Feed inlet oil temperature: Before entering the purifier, the dirty oil passes through the heater. This increases the temperature, thus reducing the viscosity of the oil to be purified. The lower the viscosity, the better will be the purification.
1. Density of Oil: As the dirty oil entering the purifier is heated to reduce the viscosity, the density also reduces. The lower the density, the better the separation.
1. R.P.M of the rotating bowl: If the purifier has not achieved full RPM (revolutions per second), then the centrifugal force will not be sufficient enough to aid the separation.
1. Back Pressure: The back pressure should be adjusted after the purifier is started. The back pressure varies as the temperature, density, viscosity of feed oil inlet varies. The back pressure ensures that the oil paring disc is immersed in the clean oil on the way of pumping to the clean oil tank.
1. Throughput of oil feed: Throughput means the quantity of oil pumped into the purifier/hr. In order to optimize the purification, the throughput must be minimum.
To ensure a smooth work, there are some tips to prevent and solve problems like overload in oil purifier.
JTR has more than decades of experience in CNC manufacturing services in China and can offer one-stop service (CNC machining parts & CNC machining prototype) for our OEM customers. All processes are carried out through hundreds of advanced CNC Machining machines, lathes, and other manufacturing facilities, ranging from blasters to Ultra Sonic washing machines. JTR CNC Machining Center not only has advanced equipment but also have a professional team of experienced engineers, operators and inspectors to make the customer’s design come true.
Precision CNC machining services for the automotive, heavy truck, HVAC and mining industries. Works with gray iron, steel and aluminum castings as well as steel forgings and steel bar stock. Capable of horizontal machining parts of 25 x 36 in. and vertical machining
JTR offers the following CNC Machining services for our customers:
● Prototype Machining & custom machined parts
● Plastic 3D Printing & Metal 3D Printing
● Precision CNC Machining & Tooling & mold make Services
● Sheet Metal Prototyping & Sheet Metal Fabrication Service
What Types of Aluminum Alloys Used in Aerospace Applications – Aerospace Grade Aluminum
As early as the 19th century, aluminum was used in aerospace. Count Ferdinand von Zeppelin made his hydrogen-filled airship from aluminum. The Wright brothers used an aluminum engine cylinder in their first manned flight in 1903. They found that metals can be strengthened by heating. Many metals, including iron and aluminum, will form atoms if heated and cooled rapidly, a more orderly crystalline structure, which makes them very corrosion-resistant. Aluminum is still the most used metal in modern aerospace applications because of its high strength, low density, and corrosion resistance.
Aluminum in the aerospace industry is almost always used with other metals to form alloys. Sometimes a small part of the added metal will significantly change the properties of the alloy. Most metals begin to decompose when exposed to oxygen. When exposed to oxygen, the combination of heat and oxygen is almost always destructive, aluminum will form a layer of aluminum oxide, namely Al2O3, which exists in the mineral corundum in crystalline form. Corundum is transparent, but natural impurities such as iron, titanium, chromium, vanadium, and magnesium will turn these crystals into red, blue, green, or other colors. We call them ruby, sapphire, and emerald. The top layer of this transparent alumina is formed on aluminum alloy, making it very corrosion-resistant. In fact, The aerospace industry is very pleased to find this transparent aluminum. Nitrogen alumina is formed by fusing aluminum oxide and nitrogen under pressure with a laser to remove electrons and chemically bond. The resultant material is transparent metal, which makes the window and telescope shield used in space excellent because it is stronger and lighter than glass or any other plastic-based alternative. Aluminum alloys used in aerospace over the last 70 years include the alloys 2014, 2219, 7050, and 7055. Aerospace CNC machining at JTR offers high-standard parts with a variety of dimensions and specifications.
– 2014 Aluminum Alloy: an aluminum-based alloy often used in the aerospace industry. 2014 is the second popular alloy of the 2000-series, only after Al 2024. Typical applications of aluminum 2014 are heavy-duty forgings, plates, and extrusions for aerospace fittings, wheels, tanks, and major structural components.
– 2219 Aluminum Alloy: 2219 is an alloy in the wrought aluminum-copper family, it has high strength, but is generally less corrosion resistant than other types of aluminum alloys. The excellent structural strength, high fracture toughness and resistance to stress corrosion cracking make it be widely used in supersonic aircraft skin and structural members. The space shuttle external tanks are also made from aluminum 2195, which replaced the 2219 aluminum-copper alloy. The newer alloy 2050 may be even better than 2195 currently used by space with improved tensile strength and fracture toughness.
– 7050 Aluminum Alloy: 7050 is known as a commercial aerospace alloy, with high toughness, high strength, and high-stress corrosion resistance. When it comes to the aerospace uses of aluminum 7075, you can find it is often used to make fuselage frames, bulkheads, and various other aircraft parts. Al 7075 is available in T7451 and T7651 tempers.
– 7055 Aluminum Alloy: 7055 is heat treatable wrought aluminum alloy that is usually applied for use in the aerospace sector and other high strength requirement areas. It provides high ultimate tensile strength. 7055-T77511 is specially developed for compression-dominated structures.
Other aerospace-grade aluminum alloys including 2024 (2024-T3, 2024-T4/T351, 2024-T851), 6061, 5052, etc.
Up milling and down milling are two common CNC Milling methods in CNC machining. Many people don’t understand the difference between them. Today’s article will talk about the difference between up milling and down milling.
The cutting edge of the milling cutter will be subjected to impact load every time it cuts in. In order to successfully milling, we must consider the correct contact mode between the cutting edge and the material when the cutting edge cuts in and cuts off in a cutting. In the milling process, the workpiece is fed in the same or opposite direction along the rotation direction of the milling cutter, which will affect the cutting in, cutting and whether to use up milling or down milling.
Up Milling Vs Down Milling For CNC Machining
The Golden Rule Of Milling – From Thick To Thin
When milling, the formation of cutting must be considered. The decisive factor of cutting formation is the position of the milling cutter. It is required to form thick chips when the cutting edge cuts in and thin chips when the cutting edge cuts out, so as to ensure a stable milling process. Be sure to remember the golden rule of milling “from thick to thin” to ensure that the chip thickness is as small as possible when the blade is cut out.
Up Milling
In up milling, the cutting tool feeds in the direction of rotation. As long as the machine tool, fixture and workpiece allow, up milling is always the preferred method. In edge up milling, the chip thickness will gradually decrease from the beginning of cutting and finally reach zero at the end of cutting. In this way, the cutting edge can avoid scratching and rubbing the part surface before participating in cutting.
Large chip thickness is advantageous, and the cutting force tends to pull the workpiece into the milling cutter to keep the cutting edge cutting. However, because the milling cutter is easy to be pulled into the workpiece, the CNC machine tool needs to eliminate the backlash to deal with the feed gap of the worktable. If the milling cutter is pulled into the workpiece, the feed will increase unexpectedly, which may lead to excessive chip thickness and fracture of the cutting edge. Back milling should be considered at this time.
Down Milling
In down milling, the feed direction of the cutting tool is opposite to its rotation direction. The chip thickness increases gradually until the end of cutting. The cutting edge must be forcibly cut in, resulting in scratching or polishing due to friction, high temperature and frequent contact with the work hardened surface caused by the front cutting edge. Will shorten the life of CNC tools.
The thick chips and high temperature produced by the cutting edge will lead to high tensile stress, shorten the tool life, and the cutting edge will usually be damaged quickly. It may also cause chips to stick or weld to the cutting edge, which will then carry them to the starting position of the next cutting, or cause the cutting edge to collapse instantaneously.
The cutting force tends to push the milling cutter and the workpiece away from each other, while the radial force tends to lift the workpiece from the workbench. When the machining allowance changes greatly, down milling is better. down milling is also used when machining superalloys with ceramic blades, because ceramics are sensitive to the impact when cutting into the workpiece.
Feed Direction Of Workpiece Fixture Tool
Different requirements are put up for workpiece fixture. It should be able to resist the lifting force during the down milling process. It should be able to resist downforce during down milling.
Comparison Between Up Milling And Down Milling