Traditional Culture Encyclopedia - Traditional culture - Mechanical principle of orange pulley
Mechanical principle of orange pulley
The structure of the orange water pulley is equivalent to an ordinary lever. It is supported or suspended by a vertical log in the middle of its long horizontal pole, and one end of the horizontal pole is connected to the water drawer with a straight rod, and the other end is tied or suspended with a heavy stone. When not drawing water, the stone position is low (bit energy is also small); when to draw water, people will force the straight rod and drawer downward pressure, at the same time. At the same time, the position of the stone at the other end rises (the potential energy increases). When the drawer is full, the stone at the other end is allowed to fall, and the potential energy stored in the stone is thus transformed: by means of a lever, it is possible to raise the drawer. In this way, the main direction of force in the process of drawing water is downward. Because the downward force can rely on the weight of the person, and thus deceive people with a sense of ease, but also greatly reduces the degree of fatigue of people carrying water. This water lifting tool, is a major irrigation machinery in ancient Chinese society.
Ancient China draw water or irrigation with a simple machine, made according to the principle of leverage. It can change the direction of force, so that the bucket can be lifted with less effort. Early records of the orange water pulley can be found in a conversation between Yan Yuan (521-490 B.C.) and Shijin in Volume 5 of Zhuang Zi, "Heavenly Fortune", written by Zhuang Zhou during the Warring States period: "And I don't see the orange water pulley, do I? If you lead it, you will bend down; if you give it up, you will look up." An early drawing of an orange water pulley is found in the Han Wuliang Ancestral Painting Stone (engraved in 147) in Jiaxiang County, Shandong Province. Song Yingxing
Song Yingxing's Tian Gong Kai Wu
Tian Gong Kai Wu (written in 1634) has a diagram of an orange water pulley (see image), using a falling stone as a counterweight.
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