在使用中,由于磨损和在销中形成裂纹而过早地更换活塞销,就决定了对柴油机的这种重要零件进行实验室研究的必要性。在内燃机车柴油机中,经常采用浮动式的(Π型)活塞销,这种活塞销在工作过程中是转动的,从而保证了销的工作表面磨损均匀。很少采用在嵌入衬套中固定的(φ型)活塞销 In use, the premature replacement of the piston pin due to wear and the formation of cracks in the pin determines the need for a laboratory study of this important part of the diesel engine. In diesel locomotive diesel engines, floating (Π-type) piston pins are often used. The piston pins rotate during operation, ensuring uniform wear on the pin’s working surface. Rarely use (φ type) fixed in the embedded sleeve bushing pin