One end of the piston rod is linked to the piston, while the other end is connected to the crosshead, integrating the piston and crosshead into a single entity, allowing the piston to move back - and - forth within the cylinder. When the compressor is in operation, the motor drives the crankshaft to revolve. The crank - connecting - rod mechanism transforms the rotational motion of the crankshaft into the reciprocating motion of the crosshead. The crosshead then drives the piston to reciprocate in the cylinder via the piston rod, thereby realizing the compression and conveyance of gas. High - strength alloy steels are chosen as materials, for example, high - grade nitriding steels like 38CrMoAl, which feature high wear - resistance, high fatigue strength, and high strength, enabling them to endure the high pressure and alternating loads during compressor operation. Alternatively, stainless steel can be used. It has excellent corrosion - resistance and oxidation - resistance, making it suitable for working environments with high corrosion - resistance requirements, such as in compressors used in industries like chemical engineering, food and beverage.
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