Design technology and evaluation of high precision and large torque standard machine

Shanghai Marine Equipment Research Institute has successfully developed a high accuracy 200 kN·m torque standard machine. This paper introduces the design principle, structure and function of 200 kN·m high torque standard machine, as well as the main technical design scheme and measurement uncertainty evaluation of the whole machine. The torque standard machine belongs to the static weight type balance structure, and adopts the knife-edge support design scheme of high strength, high rigidity, high wear resistance and high sensitivity. Breakthrough lever beam micro-jacking mechanism design, balancing mechanism synchronous motion control system design, support limit protection mechanism design, balance arm pull rod lifting control technology design, large mechanism components of ultra-high sensitivity realisation technology design, automatic intelligent control technology design, As well as the key technologies such as the innovative technology design of the static weight type torque standard and the reference type torque standard, the whole large-scale precision standard machine has reached a high level of precision and automatic control. The successful development of 200 kN·m high-torque standard machine solves the problem of safe and reliable operation of high-torque standard machine under heavy load, provides technical means for high-precision large-torque value and value transmission, and promotes the in-depth development of large-torque parameter and value transmission in China's industrial system.