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關於液体摩擦的流体力学理論基礎,經过了許多的实驗証明与修正之後,我們今天已可应用这方面的成果來設計產生承压油膜的滑动軸承。在一定的負荷及滑動速度之下,滑油由於它本身的粘性及附着性的關係,能在兩滑動面間形成一層具有一定厚度的、能承受压力的楔形油膜。这楔形油膜把兩个滑動面分開,使它們离開相当的距离。当这距离大於兩滑動面的凹凸不平的高度之和(卽其粗糙度之和),則在滑動時兩个滑動面便不会直接接觸,而祇是油層与油層問發生相对运動,这時兩滑動面間便存在着液体摩擦。油膜軸承設計包括下列內容:(1)計算在某一
With regard to the theoretical basis of hydrodynamics of liquid friction, after a lot of experiments have been proved and amended, we can now apply the results of this field to design a sliding bearing with pressure-bearing film. Under a certain load and sliding speed, the oil can form a certain thickness of the wedge-shaped oil film that can bear the pressure between the two sliding surfaces due to its own viscosity and adhesion. This wedge-shaped film separates the two sliding surfaces so that they are separated by a considerable distance. When the distance is greater than the sum of the unevenness of the two sliding surfaces (the sum of their roughness), the two sliding surfaces will not directly contact with each other when sliding, but only the relative movement between the oil layer and the oil layer occurs. There is liquid friction between the sliding surfaces. Oil film bearing design includes the following: (1) Calculated in a certain