Abstract Aiming at the problem that the key components of the roadheader under the coal mine are easily damaged and its cutting performance is poor during cutting, but it is difficult to carry out related research in the laboratory, taking the EBZ160 roadheader as the prototype, an experimental prototype was manufactured based on the similarity theory, and an active vibration cutting method was proposed. Firstly, based on the working principle and dynamics theory of the roadheader experimental prototype, the modal simulation analysis for the experimental prototype was carried out by using the ANSYS Workbench software, and the modal test was carried out based on the hammer method. The first six natural frequencies and modal shapes of the experimental prototype under the no-load state were obtained. Then, taking the cutting specific energy consumption as the evaluation index, the cutting performance of the roadheader experimental prototype under the cutting mode with or without active excitation was studied. The results showed that the maximum relative error between the simulated value and the test value of the first six natural frequencies of the roadheader experimental prototype was 9.92%, which verified the accuracy of the modal simulation analysis results and could provide a basis for the selection of subsequent excitation frequency; the cutting specific energy consumption of the roadheader experimental prototype without and with active excitation was 0.077 6 kW·h/m3 and 0.051 2 kW·h/m3, respectively, which indicated that the performance of the proposed active excitation cutting method was relatively good. The research results provide a new direction for the expansion of roadheader cutting methods, and provide an experimental basis for the structure optimization and cutting efficiency improvement of the roadheader.
Received: 30 November 2020
Published: 28 October 2021
XIE Miao, ZHANG Bao-guo, WANG Peng-fei, LI Zheng. Research on active excitation cutting performance of roadheader based on similarity theory. Chinese Journal of Engineering Design, 2021, 28(5): 576-584.
