TY - JOUR
T1 - Minimum clearance technology to improve performance of twin-screw refrigeration compressors by spraying coating on rotors
AU - Sun, Shizhong
AU - Li, Yanpeng
AU - Chen, Wenqing
AU - Xing, Ziwen
AU - Liu, Hua
N1 - Publisher Copyright:
© IMechE 2021.
PY - 2021/8
Y1 - 2021/8
N2 - During the operating of twin-screw refrigeration compressors, the leakage has a significant influence on the performance of compressors. In this paper, a novel minimum clearance technology that applies the abradable coating to the rotor surface is proposed to lessen the leakage. In order to adapt to the application of the abradable coating, the deformation of rotors during operation is analyzed and a suitable clearance is designed based on the fluid-solid coupling analysis. Then, a suitable coating pre-treated by sandblasting is obtained according to the results of friction coefficient and abradability test. Finally, a prototype is tested and the total efficiency, volumetric efficiency, refrigerating capacity, and COP of the prototype are compared before and after spraying the coating. Test results show that the volumetric efficiency and refrigerating capacity increase significantly after spraying the abradable coating, and the input power decreases slightly. As a result, the COP increases by 6.71% and 7.89% at two nominal operating conditions.
AB - During the operating of twin-screw refrigeration compressors, the leakage has a significant influence on the performance of compressors. In this paper, a novel minimum clearance technology that applies the abradable coating to the rotor surface is proposed to lessen the leakage. In order to adapt to the application of the abradable coating, the deformation of rotors during operation is analyzed and a suitable clearance is designed based on the fluid-solid coupling analysis. Then, a suitable coating pre-treated by sandblasting is obtained according to the results of friction coefficient and abradability test. Finally, a prototype is tested and the total efficiency, volumetric efficiency, refrigerating capacity, and COP of the prototype are compared before and after spraying the coating. Test results show that the volumetric efficiency and refrigerating capacity increase significantly after spraying the abradable coating, and the input power decreases slightly. As a result, the COP increases by 6.71% and 7.89% at two nominal operating conditions.
KW - Abradable coating
KW - clearance
KW - deformation
KW - fluid-solid coupled analysis
KW - twin-screw refrigeration compressor
UR - https://www.scopus.com/pages/publications/85100507227
U2 - 10.1177/0954408921989581
DO - 10.1177/0954408921989581
M3 - 文章
AN - SCOPUS:85100507227
SN - 0954-4089
VL - 235
SP - 1082
EP - 1091
JO - Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering
JF - Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering
IS - 4
ER -