问题
问答题 论述题
简述润滑油的减磨原理，并列举影响油膜层建立的主要因素有哪些？
答案
参考答案：配合件的磨损是由于接触面的相对摩擦引起的，当在摩擦面之间加入润滑剂后，使直接接触的表面相互隔开形成油膜，从而减少接触面的摩擦力，降低磨损。影响油膜层建立的主要因素有：油的黏度，轴颈的转速，轴颈与轴承的配合间隙，轴承摩擦面上的油压等。
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简述润滑油的减磨原理，并列举影响油膜层建立的主要因素有哪些？
参考答案：配合件的磨损是由于接触面的相对摩擦引起的，当在摩擦面之间加入润滑剂后，使直接接触的表面相互隔开形成油膜，从而减少接触面的摩擦力，降低磨损。影响油膜层建立的主要因素有：油的黏度，轴颈的转速，轴颈与轴承的配合间隙，轴承摩擦面上的油压等。
| If you left your book on the table overnight, you would find the following morning that it was still exactly where you had left it, provided nobody had moved it. If a ball is made to roll on a very smooth surface, it will roll a long distance unless something stops it or changes its direction. This tendency of an object to remain at rest unless something moves it and to continue moving unless something stops it is known as the Law of Inertia. The following examples show the truth of this law. (a) Put a table-cloth on a table and arrange a pile of books on it. Hold one edge of the table-cloth and pull it quickly. The table-cloth will come off, leaving the pile of books undisturbed. (b) Place a small piece of cardboard on an open jar and place a coin on it directly over its mouth. Use one finger to flick the piece of cardboard away. You will notice that the coin drops into the jar. (c) Sitting in a car which starts suddenly, you feel you are jerked backwards. In fact, you are not jerked backwards. Your lower half, which is in contact with the cushion, is forced to move forward with the car, and the upper part of your body, which remained at rest, is left behind. |
The Law of Inertia is a law concerning ______.
A．motion
B．distance
C．position
D．direction
