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백투백 방식 부하시험장비에서의 토크 추정을 이용한 수명시험법 연구
김도식,성백주,이주홍,정동수 한국신뢰성학회 2019 신뢰성응용연구 Vol.19 No.3
Purpose: Dynamometer and large-torque measurement sensors are required for the reliability testing of large mechanical and hydraulic drive power components. When torque meters cannot be used because of high torque, mounting problems, or high cost, it is necessary to estimate torque values. Methods: In order to solve the problems caused by high torque multiplication, test equipment is constituted by the back-to-back method and the pressure sensors are installed in the hydraulic motor and hydraulic pump in-line ports. The efficiency and torque were estimated using the hydraulic motor and gearbox modeling equations. Results: A comparison of the estimated output torque with the actual torque measured with the pressure sensors during the testing of a track drive system showed an error below 2% in the low-speed high-torque region. Conclusion: The proposed torque estimation method involving pressure sensors can be used in combination with a back-to-back-type hydraulic dynamometer for conducting life tests.