Lubrication-free bearings. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Bearings that do not require lubrication

26.05.2015

The Japanese company Coo Space has proposed a new technology for creating rolling bearings that can reduce friction tenfold and dispense with the use of lubrication. The development is called Autonomous Decentralized Bearing (ADB).

Rolling bearings consist of two rings, rolling elements (balls or rollers) and a cage. The latter separates the rolling elements from each other, keeps them at an equal distance and directs the movement. On the inner and outer rings there are grooves - raceways.

There are rolling bearings made without a cage. They have a larger number of rolling elements and a higher load capacity. However, the limiting speeds of full complement bearings are much lower due to the increased torque resistance.

Autonomous Decentralized Bearings do not have a cage. In this case, to keep the balls at an equal distance from each other, small recesses in the surface of the ring serve: thanks to these recesses, the rolling elements periodically slow down and accelerate. This ensures efficient operation even without lubricant.

While bearings of a new type exist in the form of prototypes. But Coo Space is already negotiating with market participants to commercialize the proposed technology.

<< Back: OWC Accelsior S - PCIe-SATA expansion card 26.05.2015

>> Forward: Transcend USB 3.0 Flash Drives 128GB and 256GB 25.05.2015

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Super high pressure in a new way 09.11.2012

The science that studies the behavior of materials under extreme conditions has made a great leap forward. More recently, a method has been discovered to create ultra-high pressure without the use of shock waves that turn solids into liquids. This discovery will allow scientists for the first time to reach an unprecedented level of high static pressure of the environment - more than four million atmospheres. It can form new compounds with altered chemical and physical properties, such as metals that have become insulators.

An international team of scientists used an anvil combined with high-energy X-rays to generate high pressure. They managed to reach a pressure of 640 gigapascals. This is 50% more pressure than has ever been demonstrated before and 150% more than was available during typical high pressure experiments. Achieving such ultra-high pressure would have enormous implications for earth science, cosmology, chemistry, physics and materials science. A static pressure of 640 gigapascals is six million times the air pressure at the Earth's surface and more than one and a half times the pressure at the center of the Earth. The study of such quantities could lead to new discoveries about how the Earth was formed.

A new way to achieve ultra-high pressures was developed jointly by scientists from the University of Bayreuth in Germany, the American University of Chicago and the University of Antwerp in Belgium. Details appeared in the journal Nature.

“We are not stopping there because we expect to increase the available pressure range to terapascal values, or 10 megabars,” said Vitaly Prokopenko, author of the article and a scientist at the Center for Advanced Radiation Sources at the University of Chicago. “This is necessary to study materials in specific conditions. , such as on the surface of the gas giants, Uranus and Neptune, where the pressure corresponds to a value of about seven megabars.

Since the late 1950s, scientists have used diamond anvils to generate extreme pressures to test the strength of materials. This was necessary to form new properties of materials, such as superconductivity, and to try to reproduce the high pressure on various planets. Scientists have tried to reach the pressure of the Earth's inner core, which ranges from 320 to 360 GPa.

The pressure was set by adding a secondary microanvil (10-20 µm in diameter) between two anvils made from gem-quality single-crystal diamonds - about one quarter carat each. And the secondary anvil is made of superhard nanocrystalline diamond.

"Nanocrystalline diamond balls have a very high yield strength, are less compressible and less brittle than single-crystal diamonds. And it is they that give us the opportunity to dramatically expand the range of achievable pressure," explained Natalya Dubrovinskaya, co-author of the article.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews