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3.螺栓松动的主要原因有哪些?锁紧连杆、主轴承和飞轮螺栓应注意什么? 答:螺栓松动的主要原因有: (1)紧固件和被紧固件承压面的微小凸凹,在力的作用下趋于平坦。 (2)紧固件和被紧固件发生塑性变形和横向位移。 (3)紧固件和被紧固件热膨胀系数不同。 (4)垫圈变形。 (5)垂直于轴线的振动和冲击、轴向的振动和冲击以及轴回转的振动和冲击。现将连杆、主轴承和飞轮螺栓几种常用锁紧方法的注意事项分别介绍如下:
3. What are the main reasons for loose bolts? Locking rod, the main bearing and flywheel bolts should pay attention to what? A: The main reasons for loose bolts are: (1) fasteners and fastener pressure surface of the small convex and concave , In the role of force tends to be flat. (2) Fasteners and fasteners undergo plastic deformation and lateral displacement. (3) Fasteners and fasteners have different coefficients of thermal expansion. (4) gasket deformation. (5) Vibration and shock perpendicular to the axis, vibration and shock in the axial direction, and vibration and impact of shaft rotation. Now the connecting rod, the main bearing and flywheel bolts several commonly used precautions are described below: