Establishment of 20 kN·m Torque Standard Machine at NIM

• Abstract:

  A set of 20 kN·m deadweight torque standard machine is newly established at National Institute of Metrology (NIM). The torque standard machine is capable of realizing torque from 100 N·m to 24 kN·m both in clockwise and anti-clockwise direction. The torque machine adopts the H-type air bearing with low friction to support the arm lever at the fulcrum, the weight loading system which consists of five groups of weights may generate five different torque ranges, as a result when the torque transducers with different rated capacities are calibrated, there needs not exchange weights and no counter-torque occurs during the loading process. This paper introduces the mechanical structure and working principle 20 kN·m torque standard machine, the uncertainty evaluation and results of performance test are described. The results show that the repeatability of the machine is better than 2 × 10^-5 ,the uncertainty of the machine is less than 2 × 10^-5 (k = 2).
• Keywords:

  torque standard machine, air bearing, arm lever, weight loading system, uncertainty
• Download:

  IMEKO-TC3-2017-026.pdf
• DOI:

  _unreg_tc3-2017.026

Event details:

• IMEKO TC:

  TC3
• Event name:

  TC3 Conference 2017 - Measurement facing new challenges!
• Title:

  23^rd Conference on the Measurement of Force, Mass and Torque (together with 4^th TC22 Conference on Vibration Measurement and 13^th TC5 Conference on the Measurement of Hardness)

• Place:

  Helsinki, FINLAND
• Time:

  30 May 2017 - 1 June 2017