Brief introduction Principle and advantages and disadvantages of refrigeration piston compressor

Brief introduction Principle and advantages and disadvantages of refrigeration piston compressor Principle: Rely on the reciprocating motion of the piston to compress the gas in the cylinder. Usually through the crank connecting rod mechanism, the rotary motion of the prime mover is transformed into the reciprocating motion of the piston. The work completed by the crankshaft every revolution can be divided into the suction process and the compression and exhaust process. Structure: including the body, crankshaft, connecting rod assembly, piston assembly, valve cylinder liner assembly, etc. Advantages of piston compressor: 1. Within the general pressure range, the requirements for materials are low, and more common steel materials are used, which is easier to process and cheaper to manufacture; 2. The thermal efficiency is high, and the thermal insulation efficiency of general large and medium-sized units can reach about 0.7~0.85; 3. The gravity and characteristics of the gas have little effect on the working performance of the compressor, and the same compressor can be used for different gases; 4. Piston compressor is relatively mature in technology, and has accumulated rich experience in production and use; 5. When the air volume is adjusted, the adaptability is strong, that is, the exhaust range is wide, and it is not affected by the pressure level, and it can adapt to a wider pressure range and cooling capacity requirements; Disadvantages of piston compressors: 1. The structure is complicated and heavy, there are many wearing parts, and the maintenance workload is large; 2. There is vibration during the operation of the machine; 3. The exhaust is discontinuous and the airflow has pulsation, which is easy to cause pipeline vibration. In severe cases, the pipeline network or machine parts are often damaged due to pulsation and resonance of the airflow; 4. The power loss is large, and the efficiency is reduced during partial load operation; 5. When multiple compressor units are used in large factories, there are many operators or work intensity.

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