Abstract：A set of 100kN·m deadweight torque standard machine is newly developed at National Institute of Metrology. The knife edge support mechanism with high precision and large load capacity is adopt to support moment arm at the fulcrum, the moment-arm adopts the single beam structure and is equipped with the arm limit protection mechanism, the weight loading system adopts the combination of inner and outer ring weight group and lifting mechanism. The working principle and mechanical structure of the machine are introduced, the results of performance test and uncertainty assessment are described. The theoretical analysis and performance tests show that the repeatability is smaller than 5×10-5,the uncertainty is less than 1×10-4 (k=3) in the range of 1kN·m to 100kN·m.
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2022, Vol. 43 
