crank shaft

简明释义

曲柄轴

英英释义

例句

1.The mechanic inspected the crank shaft for any signs of wear and tear.

机械师检查了曲轴是否有磨损的迹象。

2.The crank shaft is crucial for converting linear motion into rotational motion.

曲轴对于将线性运动转化为旋转运动至关重要。

3.He replaced the old crank shaft with a new one to improve performance.

他用新的曲轴替换了旧的，以提高性能。

4.A damaged crank shaft can lead to severe engine problems.

损坏的曲轴可能会导致严重的发动机问题。

5.During the race, the driver felt a vibration indicating a problem with the crank shaft.

在比赛中，驾驶员感到一种震动，表明曲轴存在问题。

作文

The internal combustion engine is a marvel of modern engineering, and one of its most critical components is the crank shaft. The crank shaft plays an essential role in converting the linear motion of the pistons into rotational motion, which ultimately powers the vehicle. Understanding how the crank shaft functions can help us appreciate the complexities of engine design and operation.At its core, the crank shaft is a long, cylindrical piece of metal that is connected to the engine's pistons through connecting rods. As the fuel-air mixture ignites in the combustion chamber, it pushes the piston downwards. This downward movement is what the crank shaft transforms into rotation. The crank shaft is designed with offsets, or 'crank pins,' that allow for this conversion of motion. Each time a piston moves down, it causes the crank shaft to rotate, which in turn powers the vehicle's wheels.Moreover, the crank shaft is not just a simple rod; it is intricately designed to withstand immense forces and stresses. It must be made of high-strength materials to endure the repeated impacts from the pistons, as well as the torsional stresses from the engine's operation. In many engines, the crank shaft is also balanced to reduce vibrations, ensuring smooth operation and longevity of the engine.The manufacturing process of a crank shaft is quite complex. It typically involves forging, machining, and heat treatment to achieve the required strength and durability. Engineers must carefully consider the design of the crank shaft to optimize its performance. Factors such as weight, balance, and material choice all play a significant role in how efficiently the engine operates.In addition to its mechanical functions, the crank shaft also plays a role in the overall efficiency of the engine. A well-designed crank shaft can contribute to better fuel economy and lower emissions. This is increasingly important in today’s automotive industry, where environmental regulations are becoming stricter. Manufacturers are constantly looking for ways to improve the performance of the crank shaft, using advanced materials and technologies to enhance its capabilities.Furthermore, the crank shaft is crucial for the engine's timing. It works in conjunction with the camshaft, which controls the opening and closing of the engine's valves. The synchronization between the crank shaft and the camshaft is vital for optimal engine performance. If these components are not aligned correctly, it can lead to severe engine problems, including misfires and reduced power output.In conclusion, the crank shaft is an indispensable part of the internal combustion engine, serving as the backbone of the engine's operation. Its ability to convert linear motion into rotational motion is fundamental to the functioning of vehicles. As technology continues to advance, the design and manufacturing of the crank shaft will evolve, leading to more efficient and powerful engines. Understanding the significance of the crank shaft helps us appreciate the intricate workings of modern engines and the engineering feats that make them possible.

内燃机是现代工程的奇迹，而其最关键的组成部分之一就是曲轴。曲轴在将活塞的线性运动转化为旋转运动方面发挥着至关重要的作用，这最终驱动了车辆。了解曲轴的功能可以帮助我们欣赏发动机设计和操作的复杂性。从本质上讲，曲轴是一个长柱状金属件，通过连杆与发动机的活塞相连。当燃油-空气混合物在燃烧室点燃时，它会推动活塞向下。这种向下的运动就是曲轴转化为旋转的原因。曲轴设计有偏移，或称“曲柄销”，允许这种运动的转换。每当活塞向下移动时，它就会导致曲轴旋转，从而驱动车辆的车轮。此外，曲轴不仅仅是一个简单的杆；它精心设计以承受巨大的力量和应力。它必须由高强度材料制成，以承受来自活塞的反复冲击，以及来自发动机操作的扭转应力。在许多发动机中，曲轴也经过平衡处理，以减少振动，确保平稳运行和发动机的长寿命。制造曲轴的过程非常复杂。它通常涉及锻造、机械加工和热处理，以达到所需的强度和耐久性。工程师们必须仔细考虑曲轴的设计，以优化其性能。重量、平衡和材料选择等因素在发动机的高效运行中都起着重要作用。除了其机械功能外，曲轴还对发动机的整体效率起着重要作用。设计良好的曲轴可以有助于更好的燃油经济性和更低的排放。这在当今汽车工业中尤为重要，因为环保法规日益严格。制造商们不断寻找改善曲轴性能的方法，利用先进的材料和技术来增强其能力。此外，曲轴对发动机的定时至关重要。它与控制发动机阀门开闭的凸轮轴协同工作。曲轴与凸轮轴之间的同步对发动机的最佳性能至关重要。如果这些组件未正确对齐，可能会导致严重的发动机问题，包括失火和功率输出降低。总之，曲轴是内燃机不可或缺的一部分，作为发动机运作的支柱。它将线性运动转化为旋转运动的能力是车辆功能的基础。随着技术的不断进步，曲轴的设计和制造将不断演变，带来更高效和更强大的发动机。理解曲轴的重要性有助于我们欣赏现代发动机的复杂运作及其背后的工程成就。