Abstract
The friction of the orbiting scroll leads to large power consumption and low energy efficiency of the scroll compressor. The common methods to solve this problem are high cost and a complex process. Considering special structures and operating principles to apply the coating technology on the scroll compressor is a new subject. Given the material of the orbiting scroll being aluminum alloy, the unbalanced magnetron sputtering technology for the orbiting scroll of the scroll compressor was chosen and the Cr transition layer was coated to enhance the bonding strength. Moreover, we innovatively performed an experiment to verify the feasibility of unbalanced magnetron sputtering film coating technology for the diamond-like carbon film coated in the scroll compressor. This article elaborates the parameter test methods of the film properties before and after experiments and the experimental system components. The results showed that the diamond-like carbon film has low coefficient and high bonding strength, which renders it a good wear-reducing effect and an excellent self-lubricating property. Due to the thin film layer and high operating temperature, the thickness should be increased to raise the abrasion resistance. The refrigeration system with the scroll compressor coated with the diamond-like carbon film can satisfy the national standard conditions with low Vickers hardness. Its performance was improved at low speed. Therefore, the unbalanced magnetron sputtering with increased Cr bond layer is a feasible and appropriate technology for coating diamond-like carbon film.
Highlights
Compared with other types of compressors, the wear of each part of the scroll compressor has a great impact on the reliability and performance of it [1,2]
The results showed that the diamond-like carbon film has low coefficient and high bonding strength, which renders it a good wear-reducing effect and an excellent self-lubricating property
The surface scratch of the sample with the diamond-like carbon (DLC) film is relatively shallow and smooth. It proves that the DLC film has a good wear-reducing effect and an excellent self-lubricating property
Summary
Compared with other types of compressors, the wear of each part of the scroll compressor has a great impact on the reliability and performance of it [1,2]. Under a normal operation condition, the forces acting on both sides of the orbiting scroll in the axial direction should be equal. According to the source of forces, forces on the scroll can be divided into the axial gas force Fag , the axial back force Fab , and the axial seal reaction force. Fd. The axial force Fa is the difference between the axial gas force and the axial back force. In order to obtain the axial sealing force of the orbiting scroll, the axial force is generally ensured to be negative
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