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This post was last edited and deleted by Xǐzai on 2022-12-1 12:03
Let’s talk about the operating conditions – what is the structural condition and load-bearing capacity of other components and parts during operation, as well as how does the movement of moving parts, friction pairs, and lubrication conditions work?
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It’s hard to say; it depends on judging from the comprehensive piston force curve. Textbooks specify that the pull on the piston rod should be positive; one can check whether the comprehensive piston force curve shows a larger value in the positive range or in the negative range. If the positive range is large, it means the piston rod is under tension more often; this results in the right side in your diagram being in constant contact with the crosshead pin, thereby causing poor lubrication.
As long as the clearance between the small-end bearing and the crosshead pin, as well as the clearances on both sides of the crosshead, are within the specified limits, and lubrication is proper, burning of the bearings will not occur