According to the University of Maryland campus news network reported on March 31, the school engineer modified the wood structure to make the negative structure of the lithium battery to enhance the safety and performance of the battery. The research paper titled "Large Capacity, Low Bend and Channel Guided Lithium Batteries" has been published in the Proceedings of the National Academy of Sciences on March 20th.
Lithium batteries play an important role in modern manufacturing, whether they are used in charging treasures, mobile phones, notebooks or electric vehicles. However, when the battery is fully charged, the negative electrode will rapidly expand and will shrink when the battery is exhausted. Significant structural changes can lead to more lithium metal on the surface of the battery, which has led to safety hazards such as explosions.
Scientists at the University of Maryland have proposed to abandon the traditional practice of using lithium to store lithium ions and switch to using natural pipes that transport water and nutrients in wood to contain lithium ions. In this way, wood will become the "home" of metal ions. Due to the fixed structure, the wood will not collapse or be damaged regardless of the amount of ions.
In order to ensure that the high current density does not block lithium ions outside the "home" when charging, scientists have increased the access to the interior of the wood. This modification makes the number of ions in each inlet not much, the local current density is small, the battery does not generate heat and burn, and the explosion is avoided. In addition, due to the larger internal structure of the wood, it is able to hold more electricity than the metal block under the same volume conditions.
Researchers say that the current use of natural materials such as wood to improve lithium battery construction is only part of the research. It is the natural biological structure that inspires scientific research that one can think of using renewable materials to create new ways of storing energy.
YRT Turntable Bearing is a rotary mechanism with outer ring rotation and inner ring support. It is mainly divided into three series: YRT type, YRTS type and YRTM type. The three series bearings have the same installation dimension, the internal structure is different, and the performance is similar. YRT series bearings consist of three rows of rollers, two rows of axial rollers ensure stable axial bearing capacity. A row of radial rollers ensure that the bearing can bear radial force and overturning moment, which is suitable for the slewing mechanism with axial load. YRT turntable bearings are mainly used for CNC machine manufacturing industry. As its core components, domestic YRT series bearings demand is also more dependent on imports. The accuracy parameters of domestic YRT turntable bearings are also based on international manufacturers. Since twenty-first Century, especially with the national high-end CNC machine tools and basic manufacturing equipment special start, greatly promoted the development of industry of machinery and equipment, machine tool development process of high speed and precision, complex, intelligent "has been further accelerated.
1.YRT type
The Yrt Bearing consists of a thrust / centripetal seat, a thrust / centripetal shaft ring, a thrust washer, two rolling pin cage assemblies and a group of centripetal cylindrical rollers. A screw hole for the installation of a seat ring and a shaft ring. This type of bearing has high axial and radial bearing capacity.
2.YRTS type (radial nylon maintainer)
The radial roller uses nylon retaining device to make the YRTS bearing have the characteristics of high limit speed and very low friction torque. Therefore, the bearing is suitable for engine with torque.
3.YRTM type (including steel grid measuring system)
YRTM is a two way thrust cylindrical roller YRT combined bearing equipped with steel grating ruler. It realizes real-time monitoring and adjusting the rotation accuracy of bidirectional thrust cylindrical roller combined bearing, so as to ensure the high accuracy operation of the machine.
YRT bearing bearing is suitable for axial and radial bearing mechanism. High tilt stiffness and high precision, suitable for rotary table, chuck and iron cutter head, and bearing configuration in measurement and experiment. This type of bearing is also required to match the equipment parts. When installing the required control installation screw tightening torque. It is mainly used in high precision field of high precision CNC turntable, indexing head, military radar, aviation, spaceflight and measurement and test.
Main model
YRT series (German INA/FAG company corresponding model) main model:
YRT50, YRT80, YRT100, YRT120, YRT150, YRT180, YRT200, YRT260, YRT325, YRT395, YRT460, YRT580, YRT260
YRTS series (German INA/FAG company corresponding model) main model:
YRTS200, YRTS260, YRTS325, YRTS395, YRTS460
YRTM series (German INA/FAG company corresponding model) main model:
YRTM150, YRTM180, YRTM200, YRTM260, YRTM325, YRTM395, YRTM460
Yrt Bearing
Yrt Bearing,Rotary Table Roller Bearing,Yrt Types Slewing Bearings,Rotary Table Slewing Bearing
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