This guide details critical maintenance procedures for piston compressor crankshafts and valves, key components influencing reliability and lifespan. It systematically explains the primary causes of bearing (main and connecting rod) failure, including lubrication faults, improper clearances, and geometric inaccuracies. The article further analyzes the origins of crankshaft cracks, fractures, and bending, outlines inspection methods (including non-destructive testing), and specifies repair criteria. Finally, it provides actionable strategies to extend compressor valve life through optimized design, proper operation, and preventive maintenance. Adherence to these guidelines supports systematic maintenance planning, reduces unplanned downtime, and enhances overall compressor performance and longevity.

This guide covers critical maintenance procedures for compressor core components. It details the primary causes of cracks in the compressor body (freezing, casting stress, mechanical impact) and outlines two inspection methods: kerosene penetration and hydraulic pressure testing. Comprehensive step-by-step instructions are provided for welding repairs, distinguishing between pre-heat (gas) and non-pre-heat (electric) processes. The article analyzes root causes of premature cylinder wear, separating manufacturing flaws from operational/maintenance issues. Common connecting rod defects, such as bending and bore wear, are described alongside their consequences. Causes and inspection techniques for connecting rod bolt failure are explained. Finally, the guide details the repair process for metallic packing glands, including piston rod refurbishment and the scraping-in of packing rings for a proper seal.

This article examines four critical factors governing compressor performance: temperature, humidity, air cleanliness, and clearance volume. Excessively high temperatures can reduce efficiency, accelerate wear, and cause hazardous carbon deposits, while overly low temperatures also pose operational risks. High humidity in intake air leads to corrosion, reduced capacity, and potential system freezing. Impurities in the air accelerate component wear and increase energy consumption. The unavoidable clearance volume within the cylinder directly reduces the machine's discharge capacity, requiring careful design consideration. Finally, the article outlines practical methods to increase discharge capacity and explains the strict necessity of limiting exhaust temperature to prevent dangerous carbon buildup and ensure safe, reliable operation. Understanding and controlling these interrelated factors is essential for optimal compressor performance and longevity.