Maintenance of industrial compressor crankshaft

After the crankshaft is bent and deformed, the working surface of the cylinder will be eccentrically worn, the copper sleeve of the small end of the connecting rod and the connecting rod lining will be overheated and worn early, and the crankshaft will be ground into a tapered shape. Therefore, the bending condition of the crankshaft should be checked when inspecting industrial compressors. , detect it early and take corresponding measures.
Before overhauling the industrial compressor, the crankshaft needs to be scrubbed clean and placed on the frame of the inspection platform, or the center holes at both ends of the crankshaft are pressed against the lathe with a thimble, and then a dial indicator is used. test.
During maintenance, align the dial indicator at the measuring point with one or two main journals in the middle of the crankshaft. After slowly turning the crankshaft one turn by hand, the swing error indicated on the dial indicator is the crankshaft's deflection. Bending swing error, it should be pointed out that the results measured in this way may have a large error, because it also involves the out-of-round condition of the two main journals supported on the frame and the middle main journal. Take a look Whether it has an impact on the bending play of the crankshaft? If it does, the bending play of the crankshaft must be adjusted according to the situation. The out-of-roundness of the middle main journal can be measured with an outer diameter dial indicator or a crankshaft gauge.
The curvature of the industrial compressor crankshaft refers to the ratio of the distance between the center line of the shaft and the theoretical center line to the measured shaft length. During maintenance, for specific parts, the length of the part has been determined. , so it usually refers to the degree of offset between the two. The bending swing difference is twice the bending degree. After industrial compressor maintenance, timely repair and replacement can ensure the normal operation of the industrial compressor crankshaft.