viscosity index

简明释义

粘度指数

英英释义

例句

1.The viscosity index 粘度指数 of this hydraulic fluid is critical for its performance in extreme conditions.

这种液压油的粘度指数 viscosity index 对其在极端条件下的性能至关重要。

2.Manufacturers often test the viscosity index 粘度指数 of their products to ensure they meet industry standards.

制造商通常测试其产品的粘度指数 viscosity index 以确保符合行业标准。

3.When selecting lubricant, consider the viscosity index 粘度指数 to ensure optimal performance in varying temperatures.

在选择润滑油时，考虑粘度指数 viscosity index 以确保在不同温度下的最佳性能。

4.A higher viscosity index 粘度指数 means less change in viscosity with temperature fluctuations.

更高的粘度指数 viscosity index 意味着粘度在温度波动时变化较小。

5.The oil's high viscosity index 粘度指数 indicates that it maintains its viscosity better across a wide temperature range.

这款油的高粘度指数 viscosity index 表明它在较宽的温度范围内能更好地保持其粘度。

作文

The term viscosity index refers to a measure of how the viscosity of a fluid changes with temperature. Viscosity itself is a property that describes a fluid's resistance to flow; for example, honey has a higher viscosity than water. Understanding the viscosity index is crucial in various industries, particularly in lubrication and automotive engineering. A higher viscosity index indicates that the fluid's viscosity changes less with temperature fluctuations, making it more stable under different operating conditions.In the context of engine oils, the viscosity index plays a significant role in determining the oil's performance. For instance, an oil with a high viscosity index will maintain its protective qualities even at high temperatures, ensuring that the engine remains well-lubricated and functions efficiently. Conversely, oils with a low viscosity index may become too thin at elevated temperatures, leading to inadequate lubrication and potential engine damage.To illustrate the importance of the viscosity index, consider the operation of an engine during different seasons. In colder temperatures, engine oil needs to be able to flow easily to ensure proper lubrication during startup. An oil with a high viscosity index will remain viscous enough to provide protection, while also being thin enough to flow quickly at lower temperatures. This balance is essential for maintaining engine health and performance.Moreover, the viscosity index is not only relevant for engine oils but also for hydraulic fluids, gear oils, and other lubricants used in machinery. Industries rely on fluids with specific viscosity index ratings to ensure optimal performance and longevity of their equipment. For example, hydraulic systems require fluids that can operate effectively across a range of temperatures without losing their ability to transmit power.In addition to practical applications, the viscosity index is also a topic of research in fluid dynamics. Scientists and engineers study how different additives can improve the viscosity index of oils and fluids. These additives can help stabilize the viscosity across temperature changes, enhancing the overall performance of the fluid.In summary, the viscosity index is a critical parameter in understanding fluid behavior, especially in applications involving lubrication and machinery. It helps predict how a fluid will perform under varying temperature conditions, ensuring that engines and equipment operate smoothly and efficiently. As technology advances, the importance of the viscosity index will likely continue to grow, influencing the development of new fluids and lubricants designed to meet the demands of modern engineering challenges.

“粘度指数”一词指的是流体粘度随温度变化的程度。粘度本身是描述流体流动阻力的属性；例如，蜂蜜的粘度比水高。理解“粘度指数”在各个行业中至关重要，特别是在润滑和汽车工程中。较高的“粘度指数”表明流体的粘度在温度波动下变化较小，使其在不同的操作条件下更稳定。在发动机油的背景下，“粘度指数”在确定油品性能方面发挥着重要作用。例如，具有高“粘度指数”的油在高温下会保持其保护特性，确保发动机保持良好的润滑并高效运行。相反，具有低“粘度指数”的油在高温下可能变得过于稀薄，导致润滑不足并可能损害发动机。为了说明“粘度指数”的重要性，可以考虑发动机在不同季节的运行。在较冷的温度下，发动机油需要能够顺畅流动，以确保启动时的适当润滑。具有高“粘度指数”的油将保持足够的粘度以提供保护，同时在较低温度下也能稀薄到快速流动。这种平衡对于保持发动机的健康和性能至关重要。此外，“粘度指数”不仅与发动机油相关，还与液压油、齿轮油和其他用于机械的润滑剂相关。各行业依赖具有特定“粘度指数”评级的流体，以确保设备的最佳性能和使用寿命。例如，液压系统需要能够在温度范围内有效工作的流体，而不会失去传递动力的能力。除了实际应用外，“粘度指数”也是流体动力学研究的一个主题。科学家和工程师研究不同添加剂如何改善油和流体的“粘度指数”。这些添加剂可以帮助稳定粘度在温度变化中的表现，从而增强流体的整体性能。总之，“粘度指数”是理解流体行为的关键参数，尤其是在涉及润滑和机械应用的情况下。它有助于预测流体在不同温度条件下的表现，确保发动机和设备平稳高效地运行。随着技术的进步，“粘度指数”的重要性可能会继续增长，影响新流体和润滑剂的发展，以满足现代工程挑战的需求。