external gear

简明释义

外齿轮

英英释义

例句

1.The robot uses an external gear to increase its lifting capacity.

这台机器人使用一个外部齿轮来增加其提升能力。

2.For the car's transmission, the external gear plays a crucial role in power distribution.

在汽车的变速器中，外部齿轮在动力分配中起着至关重要的作用。

3.The clock mechanism relies on an external gear to keep accurate time.

这个钟表机制依赖于一个外部齿轮来保持准确的时间。

4.In this bicycle design, the external gear allows for smoother shifting.

在这个自行车设计中，外部齿轮允许更平滑的换挡。

5.The model train features an external gear system for better speed control.

这款模型火车采用了一个外部齿轮系统，以便更好地控制速度。

作文

In the world of machinery and engineering, the term external gear refers to a type of gear system where the teeth are located on the outer surface of the gear wheel. This design allows for efficient power transmission between two shafts that are not necessarily aligned with each other. The concept of external gear is fundamental in various applications, from simple mechanical devices to complex industrial machinery. Understanding how external gear systems work can provide insights into their advantages and limitations.One of the primary advantages of using external gear systems is their ability to transmit torque effectively. When two gears mesh together, the teeth interlock and transfer rotational motion from one gear to another. This interlocking mechanism is crucial in ensuring that the gears operate smoothly and efficiently. In contrast to internal gears, which have their teeth on the inside surface, external gear systems are generally easier to manufacture and maintain. Their straightforward design means that they can be produced in large quantities and at a lower cost, making them a popular choice in many industries.Moreover, external gear systems can be designed to achieve different gear ratios. By varying the size of the gears, engineers can create systems that either increase or decrease the speed of rotation. For instance, a small external gear driving a larger gear will result in a reduction of speed but an increase in torque. This principle is widely utilized in automotive transmissions, where different gear ratios allow vehicles to accelerate smoothly and efficiently.However, there are also some challenges associated with external gear systems. One of the main issues is wear and tear. As the gears rotate and interact with each other, friction can lead to degradation of the gear teeth over time. This is particularly true if the gears are not properly lubricated or if they are subjected to excessive loads. Regular maintenance is essential to ensure the longevity of external gear systems, and engineers must consider factors such as material selection and lubrication methods to mitigate these risks.Another consideration is the noise generated by external gear systems during operation. The meshing of gear teeth can produce vibrations that translate into sound, which may be undesirable in certain applications. Engineers often implement design modifications, such as using helical gears instead of spur gears, to reduce noise levels. Additionally, proper alignment and installation practices can help minimize vibration and improve overall performance.In conclusion, the concept of external gear is integral to the functioning of many mechanical systems. Its ability to efficiently transmit power and torque makes it a preferred choice in various applications, from household appliances to heavy machinery. While there are challenges related to wear, maintenance, and noise, advancements in materials and engineering practices continue to enhance the reliability and performance of external gear systems. As technology evolves, the role of external gear in modern engineering will undoubtedly continue to expand, providing innovative solutions to meet the demands of an ever-changing world.

在机械和工程的世界中，术语外齿轮指的是一种齿轮系统，其齿位于齿轮轮的外表面。这种设计允许在两个不一定对齐的轴之间高效传递动力。外齿轮的概念在从简单机械设备到复杂工业机械的各种应用中都是基础性的。理解外齿轮系统的工作原理可以提供对其优缺点的深入了解。使用外齿轮系统的主要优点之一是它们有效传递扭矩的能力。当两个齿轮啮合时，齿互锁并将旋转运动从一个齿轮转移到另一个齿轮。这种互锁机制对于确保齿轮平稳高效地运行至关重要。与内部齿轮相比，后者的齿位于内表面，外齿轮系统通常更容易制造和维护。它们简单的设计意味着可以大规模生产，并且成本较低，使其成为许多行业的热门选择。此外，外齿轮系统可以设计成实现不同的齿轮比。通过改变齿轮的大小，工程师可以创建速度加快或减慢的系统。例如，一个小的外齿轮驱动一个较大的齿轮，将导致速度降低但扭矩增加。这一原理在汽车变速器中广泛应用，不同的齿轮比允许车辆平稳高效地加速。然而，外齿轮系统也存在一些挑战。其中一个主要问题是磨损。随着齿轮旋转并相互作用，摩擦可能导致齿轮齿随时间退化。如果齿轮没有得到适当润滑或承受过大的负荷，这种情况尤其严重。定期维护对于确保外齿轮系统的长期使用至关重要，工程师必须考虑材料选择和润滑方法等因素，以减轻这些风险。另一个考虑因素是外齿轮系统在操作过程中产生的噪音。齿轮齿的啮合会产生振动，这可能在某些应用中是不可取的。工程师通常会实施设计修改，例如使用斜齿轮而不是直齿轮，以降低噪音水平。此外，适当的对齐和安装实践可以帮助最小化振动并改善整体性能。总之，外齿轮的概念是许多机械系统运行的核心。它高效传递动力和扭矩的能力使其成为各种应用的首选，从家用电器到重型机械。尽管与磨损、维护和噪音相关的挑战仍然存在，但材料和工程实践的进步继续增强外齿轮系统的可靠性和性能。随着技术的发展，外齿轮在现代工程中的作用无疑将继续扩大，为满足不断变化的世界需求提供创新解决方案。