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| An Automatic High Accuracy 100N·m Torque Standard Machine |
| ZHANG Zhi-min1,LI Tao2,ZHANG Yue1,GUO Bin1,MENG Feng1,JI Hong-lei2,DAI Ming2 |
1.National Institute of Metrology, Beijing 100013, China
2.Shanghai Marine Equipment Research Institute, Shanghai 130025, China |
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Abstract A set of high accuracy 100N·m torque standard machine is developed at National Institute of Metrology (NIM). The air bearing technology and flexible coupling are firstly used in this torque standard machine in China, the accurate adjustment technology is used, and the low expansion alloy (INVOR) is used as the material of arm lever, as a result the uncertainty of this machine is minimized. The operation principle, mechanical structure and electric control system of this machine are introduced, the uncertainty assessment and the results of performance test are described. The results show that the repeatability of the machine is better than 2×10-5，the uncertainty is less than 2×10-5 (k=2).
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［1］Peschel D, Mauersberger D. Determination of the Friction of Aerostatic Radial Bearing for the Lever-Mass System of Torque Standard Machines［A］. Proceedings of the XIIIth IMEKO World Congress［C］,Torino,Italy,1994,216-220.
［2］张智敏，李涛，张跃，等.基于空气轴承支撑技术的100N·m扭矩标准机的设计［J］. 计量技术，2007(10): 35-37. |
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2010, Vol. 31 
