The cause of the compression loss is related to the leakage loss, which is related to the resistance of the exhaust port exhaust valve and the exhaust muffler. Therefore, the smoothness of the exhaust hole is improved, the height is reduced, the exhaust hole diameter and the lift area are properly arranged, and the exhaust valve is improved. The structure, due to the smooth flow of airflow, reduces the over-compression loss. In addition to the increase in volumetric efficiency described above, the compression efficiency has also increased from the original reed valve, thereby achieving a high level of overall compressor efficiency. In order to reduce the impact of leakage on volumetric efficiency and mechanical efficiency, each rotary compressor manufacturer adopts precision machining, precision assembly and matching size matching technology.
In addition, over-compression is also a problem unique to rotary compressors. During the exhaust process, since the inner surface of the cylinder is not parallel to the outer circumference of the rotor, the cross-section of the high-pressure chamber is gradually reduced, and after the exhaust pressure has been reached during compression, it is further increased to form over-compression, and this over-compression The effect becomes more pronounced as the height of the cylinder increases. Some companies in Japan have designed the cylinder height to a certain extent in their design, and actively promoted low-altitude cylinders in high-efficiency compressors. The super finishing process is used to reduce the friction coefficient between the outer surface of the piston and the sliding piece and improve its anti-wearing property. At present, the structure of the compressor core is becoming more and more mature, and the efficiency of the motor is more important when the size, shape and position accuracy and surface roughness of each slider are almost reached. There are many ways to improve the efficiency of the motor. The commonly used ones are: adopting advanced heat and surface treatment processes for the stator and rotor core of the motor to reduce iron loss and improve magnetic induction.
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513Series Petroleum Submersed Pump
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