journal bearing

简明释义

轴颈

英英释义

例句

1.The engine's performance largely depends on the quality of the journal bearing.

发动机的性能在很大程度上取决于滑动轴承的质量。

2.A worn journal bearing can lead to increased friction and overheating.

磨损的滑动轴承会导致摩擦增加和过热。

3.The design of the journal bearing must account for load and speed conditions.

设计滑动轴承时必须考虑负载和速度条件。

4.Regular maintenance can extend the life of the journal bearing in machinery.

定期维护可以延长机械中滑动轴承的使用寿命。

5.In many applications, the journal bearing is preferred for its simplicity.

在许多应用中，因其简单性，滑动轴承被优先选择。

作文

In the world of mechanical engineering, the importance of various components cannot be overstated. One such crucial component is the journal bearing, which plays a vital role in the operation of rotating machinery. A journal bearing is a type of bearing that supports a rotating shaft, allowing it to turn smoothly while minimizing friction and wear. This is particularly important in applications where high speeds and heavy loads are present, such as in engines, turbines, and other industrial machinery.The design of a journal bearing typically consists of a cylindrical sleeve that encases the shaft. This sleeve is often made from materials that have good wear resistance and low friction characteristics, such as bronze or polymer composites. The space between the shaft and the bearing is filled with a lubricant, which can be oil or grease, depending on the application. The lubricant forms a thin film that separates the shaft from the bearing surface, preventing direct contact and thus reducing wear.One of the primary advantages of using a journal bearing is its ability to handle radial loads effectively. Unlike rolling element bearings, which can only support loads in certain directions, journal bearings can accommodate forces acting in multiple directions. This makes them suitable for applications where the load may change frequently or where misalignment might occur.However, journal bearings also have their limitations. For instance, they require precise alignment to function correctly, as any misalignment can lead to increased friction and premature failure. Additionally, the performance of a journal bearing can be affected by factors such as temperature, speed, and the viscosity of the lubricant used. Therefore, careful consideration must be given to these factors during the design and selection process.In recent years, advancements in materials and manufacturing processes have led to the development of improved journal bearings. For example, the introduction of composite materials has enhanced the performance and durability of these bearings, allowing them to operate efficiently under extreme conditions. Furthermore, the use of advanced lubrication techniques, such as hydrodynamic and hydrostatic lubrication, has significantly improved the reliability of journal bearings in high-speed applications.In conclusion, the journal bearing is an essential component in many mechanical systems, providing support and facilitating smooth rotation of shafts. Its ability to handle radial loads and reduce friction makes it a preferred choice in various industries. As technology continues to evolve, the design and performance of journal bearings will likely improve, further enhancing their application in modern machinery. Understanding the principles behind journal bearings and their operational characteristics is crucial for engineers and technicians who strive to design efficient and reliable mechanical systems.

在机械工程的世界中，各种组件的重要性不容小觑。其中一个关键组件就是滑动轴承，它在旋转机械的运行中发挥着重要作用。滑动轴承是一种支撑旋转轴的轴承，允许其平稳地转动，同时最小化摩擦和磨损。这在高速和重载应用中尤为重要，例如发动机、涡轮机和其他工业机械。滑动轴承的设计通常由一个圆柱形的套筒组成，该套筒包裹着轴。这个套筒通常由具有良好耐磨性和低摩擦特性的材料制成，例如青铜或聚合物复合材料。轴和轴承之间的空间充满润滑剂，可以是油或脂肪，具体取决于应用。润滑剂形成一层薄膜，将轴与轴承表面分开，防止直接接触，从而减少磨损。使用滑动轴承的主要优点之一是其有效处理径向载荷的能力。与只能支持某些方向载荷的滚动元件轴承不同，滑动轴承可以适应多个方向施加的力。这使得它们适用于载荷可能频繁变化或可能发生失配的应用。然而，滑动轴承也有其局限性。例如，它们需要精确对齐才能正常工作，因为任何失配都可能导致摩擦增加和提前失效。此外，滑动轴承的性能可能会受到温度、速度和所用润滑剂粘度等因素的影响。因此，在设计和选择过程中必须仔细考虑这些因素。近年来，材料和制造工艺的进步导致了改进的滑动轴承的发展。例如，复合材料的引入增强了这些轴承的性能和耐用性，使其能够在极端条件下高效运行。此外，采用先进的润滑技术，如流体动力润滑和静态润滑，显著提高了滑动轴承在高速应用中的可靠性。总之，滑动轴承是许多机械系统中不可或缺的组件，提供支撑并促进轴的平稳旋转。其处理径向载荷和减少摩擦的能力使其成为各个行业的首选。随着技术的不断发展，滑动轴承的设计和性能可能会进一步改善，进一步增强其在现代机械中的应用。理解滑动轴承背后的原理及其操作特性对努力设计高效和可靠机械系统的工程师和技术人员至关重要。