How to correctly choose a silent oil-free air compressor

How to correctly choose a silent oil-free air compressor

Since the silent oil-free air compressor uses oil-free self-lubricating technology, its core components, Jose ring and bearings, have high requirements for materials, and it has been difficult to solve them well. With the advancement of science and technology, some special wear-resistant materials have been applied, and this technological barrier has been broken through. In less than 10 years, the silent oil-free air compressor was first born in Europe. Because of its environmental protection, energy saving, ultra-low noise, no oily substances, fresh compressed air quality, clean, safe and durable, it is used in European and American countries. Has been widely promoted and applied.

In 2002, Ruian Aite Electromechanical took the lead in introducing silent air compressor production technology from Germany, and obtained a number of national invention patents, providing technical support for domestic silent oil-free air compressor manufacturers, and it was quickly promoted in China. Get rid of the embarrassing situation of relying on imports.

However, due to some domestic manufacturers' technical irregularities and shoddy manufacturing, the silent and oil-free air compressors produced do not meet international standards. So how to correctly choose a silent oil-free air compressor?

This article will focus on the related technologies of silent oil-free air compressors for your reference.

1. At present, the main engines of silent oil-free air compressors all use miniature reciprocating piston compressors. If they are not of this type, it can be judged with certainty that this type of air compressor is not a silent oil-free air compressor, and the air quality cannot reach Requirements for silent oil-free air compressors. The working principle of the main engine of the silent oil-free air compressor: When the motor single-shaft drives the compressor crankshaft to rotate, through the transmission of the connecting rod, the self-lubricating piston without adding any lubricant will reciprocate. The inner wall of the cylinder, the cylinder head and the piston The working volume formed by the top surface will change periodically. When the piston of a piston compressor starts to move from the cylinder head, the working volume in the cylinder gradually increases. At this time, the gas follows the intake pipe and pushes the intake valve to enter the cylinder until the working volume reaches the maximum. , The intake valve is closed; when the piston of the piston compressor moves in the reverse direction, the working volume in the cylinder decreases and the gas pressure increases. When the pressure in the cylinder reaches and is slightly higher than the exhaust pressure, the exhaust valve opens and the gas is discharged out of the cylinder , Until the piston moves to the limit position, the exhaust valve is closed. When the piston of the piston compressor moves in the reverse direction again, the above process repeats. Namely: the crankshaft of the piston compressor rotates once, the piston reciprocates once, and the process of air intake, compression and exhaust is realized in the cylinder, which completes a working cycle. The single-shaft and double-cylinder structure design makes the compressor gas flow rate twice that of the single-cylinder when the rated speed is constant, and the vibration and noise control is well controlled.

2. Whether the technical parameter identification is complete and correct. The parameters identified in accordance with international conventions include metric units and American units. For example, the parameter identification of electromechanical is very formal and accurate (see the table below). Manufacturers with simple parameter identification are unable to do such technical parameter testing because they do not have relevant testing equipment, or some parameters do not meet the general technical standards. Therefore, when choosing, it is recommended that you ask the manufacturer to provide detailed parameters for your convenience. Make the right choice.

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3. Whether the host has passed and industrial product license certification. Although some manufacturers have passed some foreign certifications, they have not passed the domestic compulsory certification because they do not meet the domestic industry standards. There may be risks in use. The above content refers to many technical documents of silent oil-free air compressors. I would like to thank the electromechanical expert group and air compressor related industry associations for providing technical information.