曲轴是压缩机、内燃机和发动机等机器中的重要零件之一。在压缩机中曲轴接受原动机的动力,将旋转运动转变为活塞的直线往复运动并压缩气体而作功。活塞的惯性力以及承受到气体的压力,通过连杆使曲轴产生交变的弯曲应力和扭转应力,故设计曲轴必须要有足够的强度。此外还要考虑曲轴的 Crankshafts are one of the most important parts in compressors, internal combustion engines and engines. In the compressor crankshaft to accept the power of the prime mover, the rotary motion into a linear piston reciprocating and compressed gas work. The inertia force of the piston and the pressure to the gas, through the connecting rod so that the crankshaft alternating bending stress and torsional stress, so the design of the crankshaft must have sufficient strength. Also consider the crankshaft