The Effect Of Surface Texture On The Coefficient Of Performance Of Compressor

With the development of society, refrigeration equipment, such as refrigerator, air-condition and small business refrigeration plant, have already widely appeared in our daily life and industrial production.Various kinds of compressor is the core part of above-mentioned equipment, which is called the heart of refrigeration system. So the various functions of compressor is very important for the corresponding index of refrigeration equipment. The friction power accounted for 10% of the total power in compressor, and it has a wide field of application,so the global energy loss is the striking thing. Nowadays, international scholars are searching for a effective way to decrease the needless loss of energy, who improve the efficiency of compressor by optimizing the structure and material of compressor,which lighten the huge burden of energy in nowadays society. Surface texture technology, which is a late-model and already mature surface treatment technique, has already been used in the business widely, such as engine piston, computer hard disk, golf ball and so on. Machining microstructure on the surface of the core parts in compressor by the surface texture technology can change the tribology performance of the parts, which can decrease the frictional wear in compressor and improve the energy efficiency ratio and service life.Complete the manufacture of surface texture on the surface of core parts in compressor by the lithography or photopolymer and micro-electrochemical machining technology, and design experimental research and on-board test. In experimental research, the experiment condition is close to the working condition, but own to the limitation of testing machine, the tribology performance of sliding vane is only study in experimental research. The diameter,area rate and depth of micro-pit is take into account in experimental research to observe the variation of the tribology performance of sliding vane in different speed. From the experimental data, most show the effect of friction reduction when the diameter of micro-pit is 100?m, the friction coefficient decrease as the speed increase when the diameter of micro-pit is 200?m, the friction coefficient increase as the speed increase in low area rate of micro-pit while the friction coefficient decrease as the speed increase in high area rate of micro-pit when the diameter of micro-pit is 300?m. The anti-friction rate reach the maximal as 78.3% when the diameter,area rate and depth of micro-pit is separately 200?m,40% and 0.02.In the on-board test, the sliding vane, bent axle and piston are installed in compressor to observe the effect of surface texture, which is also the energy efficiency ratio. Through the data, the area rate should low,the diameter and depth of micro-pit should low as the speed is low while the diameter and depth of micro-pit should large as the speed is high for sliding vane. The energy efficiency ratio of compressor increases at first then decreases while the speed is continuous improve for bent axle. For piston, the optimal energy efficiency ratio of compressor can obtained when the parameter of surface texture is in the middle level.