journal bearing

简明释义

轴颈轴承

英英释义

例句

1.In high-speed applications, the performance of the journal bearing 滑动轴承 can significantly affect efficiency.

在高速应用中，滑动轴承的性能会显著影响效率。

2.Proper lubrication of the journal bearing 滑动轴承 is essential for its longevity.

对滑动轴承进行适当的润滑对其耐用性至关重要。

3.The engineer explained how the journal bearing 滑动轴承 reduces friction in the motor.

工程师解释了如何通过滑动轴承来减少电动机中的摩擦。

4.During maintenance, we found that the journal bearing 滑动轴承 was worn out and needed replacement.

在维护期间，我们发现滑动轴承已经磨损，需要更换。

5.The design of the journal bearing 滑动轴承 allows for smooth rotation of the shaft.

滑动轴承的设计允许轴平稳旋转。

作文

In the realm of mechanical engineering, various components play crucial roles in ensuring the smooth operation of machines. One such essential component is the journal bearing, which is a type of bearing that supports a rotating shaft. The journal bearing is designed to reduce friction between the moving parts, allowing for efficient motion and reducing wear and tear on the machinery. Unlike other types of bearings, the journal bearing operates on a principle of hydrodynamic lubrication, where a thin film of lubricant is created between the bearing surface and the shaft. This film prevents direct contact between the two surfaces, significantly minimizing friction and heat generation.The design of a journal bearing typically consists of a cylindrical sleeve that encases the shaft. The inner surface of the bearing is usually made from materials with excellent wear resistance, such as bronze or polymers, while the outer surface may be mounted in a housing that provides support. As the shaft rotates within the journal bearing, the lubricant is drawn into the space between the bearing and the shaft, creating a hydrodynamic wedge that lifts the shaft away from the bearing surface. This mechanism is vital because it allows the shaft to rotate smoothly without the risk of seizing or excessive wear.One of the significant advantages of using a journal bearing is its ability to handle high loads and speeds. In applications like automotive engines and turbines, journal bearings are commonly used due to their durability and reliability. They can accommodate misalignment and thermal expansion, making them suitable for various operating conditions. However, it is essential to maintain proper lubrication and ensure that the bearing is not subjected to excessive loads beyond its design limits, as this could lead to premature failure.The performance of a journal bearing is influenced by several factors, including the viscosity of the lubricant, the speed of the shaft, and the load applied to the bearing. Engineers must consider these factors when designing systems that incorporate journal bearings. For instance, in high-speed applications, a lower viscosity lubricant may be required to ensure adequate lubrication and prevent overheating. Conversely, in heavy-load applications, a higher viscosity lubricant may be necessary to maintain the integrity of the lubricating film.In conclusion, the journal bearing is a fundamental component in many mechanical systems, providing essential support and enabling efficient motion. Its unique design and operation principles make it a preferred choice in various applications, particularly where high loads and speeds are involved. Understanding how journal bearings work and their importance in machinery can lead to better maintenance practices and improved machine longevity. As technology continues to evolve, the design and materials used in journal bearings will likely advance, further enhancing their performance and reliability in modern engineering applications.

在机械工程领域，各种组件在确保机器平稳运行中发挥着至关重要的作用。其中一个基本组件是滑动轴承，这是一种支撑旋转轴的轴承。滑动轴承的设计旨在减少运动部件之间的摩擦，从而实现高效运动并减少机械磨损。与其他类型的轴承不同，滑动轴承基于流体动力润滑原理工作，在轴承表面和轴之间形成一层薄薄的润滑膜。这层膜防止两个表面之间直接接触，从而显著降低摩擦和热量产生。滑动轴承的设计通常由一个圆柱形套筒组成，该套筒包裹着轴。轴承的内表面通常由具有优良耐磨性的材料制成，如青铜或聚合物，而外表面可能安装在提供支撑的外壳中。当轴在滑动轴承内旋转时，润滑剂被吸入轴承和轴之间的空间，形成一个流体动力楔，将轴抬离轴承表面。这一机制至关重要，因为它允许轴平稳旋转，而不必担心卡住或过度磨损。使用滑动轴承的一个重大优势是它能够承受高负荷和高速。在汽车发动机和涡轮机等应用中，滑动轴承因其耐用性和可靠性而被广泛使用。它们可以适应不对中和热膨胀，使其适用于各种操作条件。然而，保持适当的润滑并确保轴承不受超过设计极限的过大负载是至关重要的，因为这可能导致提前失效。滑动轴承的性能受到多种因素的影响，包括润滑剂的粘度、轴的转速和施加于轴承的负载。工程师在设计包含滑动轴承的系统时必须考虑这些因素。例如，在高速应用中，可能需要较低粘度的润滑剂，以确保充分润滑并防止过热。相反，在重载应用中，可能需要较高粘度的润滑剂，以维持润滑膜的完整性。总之，滑动轴承是许多机械系统中的基本组件，提供必要的支撑并使高效运动成为可能。其独特的设计和操作原理使其成为各种应用中的首选，特别是在涉及高负荷和高速的情况下。理解滑动轴承的工作原理及其在机械中的重要性，可以带来更好的维护实践和改善机器的使用寿命。随着技术的不断发展，滑动轴承的设计和材料可能会进一步进步，从而提升其在现代工程应用中的性能和可靠性。