The efficiency of an oil free scroll compressor is not static and is affected by a combination of factors. Understanding these factors is essential to optimize the performance of the equipment and improve production efficiency. Combined with the working principle of oil-free scroll air compressor, the following analysis from multiple dimensions.
I. Equipment structure and manufacturing process
(a) Scroll disk precision and wear
As the core component of oil free scroll compressor, the manufacturing precision of scroll disk directly affects the working efficiency. The scroll teeth of the static and dynamic scroll disk need to be meshed precisely, and if the processing precision is insufficient, resulting in too large a gap between the teeth, it will cause gas leakage in the compression process and reduce the compression efficiency. In addition, after a long period of operation, the scroll disk will appear wear, especially in the high load or irregular use, the wear increases. The increased gap caused by wear will also trigger gas backflow and leakage, making the air compression is not sufficient, which in turn reduces the working efficiency.
(ii) Eccentric Shaft and Bearing Performance
The eccentric shaft drives the moving scroll disk to do eccentric rotary translation, and the stability and accuracy of its operation is critical. If the material of the eccentric shaft is not good and the manufacturing process is rough, deformation, vibration and other problems may occur, affecting the normal trajectory of the moving scroll disk, resulting in irregular changes in the volume of the compression chamber and a decline in compression efficiency. The bearing as a key component to support the eccentric shaft, if poor lubrication, wear and tear, will increase the operating resistance, consume more energy, reduce the overall efficiency of the equipment. Second, the operating environment conditions
(a) Inlet temperature and humidity
Inlet temperature has a significant impact on the working efficiency of oil-free scroll compressor. According to the gas equation of state, high temperature environment, air density decreases, the same volume of air contains less mass, in the compression process, need to consume more energy to reach the set pressure, thus reducing efficiency. In addition, high humidity environment, the water vapor content in the air is higher, in the compression process, water vapor will condense into water, which not only increases the resistance of the compression process, but also may cause corrosion on the internal components of the equipment, affecting the performance and efficiency of the equipment.
(ii) Altitude
As the altitude increases, the atmospheric pressure decreases and the air becomes thin. Oil-free scroll compressor in the air intake process, the amount of air intake is relatively reduced, compressed output compressed air volume and pressure will also be reduced accordingly. This means that in high altitude areas, in order to achieve the same air supply effect, the compressor needs to consume more energy, and the working efficiency decreases. Operation and Maintenance
(a) Operating Parameter Setting
Whether the operating parameters of oil-free scroll compressor, such as exhaust pressure and rotational speed, are set reasonably or not directly affects the working efficiency. If the exhaust pressure is set too high, more than the actual demand for air, the compressor needs to consume more energy to maintain high-pressure output, resulting in waste of energy and reduced efficiency; while the speed is not set properly, too high or too low will affect the stability and efficiency of the compression process.
(ii) Regular maintenance
Regular maintenance is the key to ensure the efficient operation of oil-free scroll compressors. If the air filter is not cleaned in time, the clogging of the filter element will increase the resistance of air intake, resulting in insufficient air intake, affecting the compression efficiency; not on time to replace the lubricating oil (for models with auxiliary lubrication parts), will make the bearings and other parts of the lubrication is poor, increasing the friction resistance; long term without checking and calibrating the equipment's operating parameters will lead to the equipment deviates from the optimal working condition, the efficiency of the decline. The working efficiency of
oil free scroll compressor is affected by the structure of the equipment, operating environment, operation and maintenance and other factors. Enterprises and users in the use of the process, need to fully understand these influencing factors, through the optimization of equipment selection, improve the operating environment, standardize the operation and maintenance of measures to maximize the efficiency of the oil free scroll air compressor, to give full play to its maximum performance, to provide reliable protection for the production activities.
