31 / 2023-12-25 09:10:18

感知刀盘设计及性能研究

全断面硬岩掘进机；刀盘；惠通斯电桥；载荷无线监测

Cutterhead hob has the characteristics of cutting hard rock, less tool wear, and small dust concentration, and is widely used as a cutting part of various new type tunneling machines. However, there is no reliable cutterhead hob load monitoring scheme at present, and the load of the tunneling machine can not be perceived when the machine is working, which greatly hinders the application and development of the full-section hard rock tunneling machine. In view of the above problems, a mechanical decoupled three-dimensional load wireless measurement device for cutterhead hob is proposed and a physical prototype is built. The device uses elastic metal columns to convert the hob load into strain, and through different Wheatstone bridge circuits, realizes the mechanical decoupling of the three-dimensional load of the cutterhead hob. The strain of each metal column is converted into the voltage output change of the bridge circuit, and the wireless strain acquisition instrument is used to realize the wireless acquisition and transmission of the cutterhead hob load. Firstly, the mechanical mechanism and measurement circuit of the three-dimensional load measurement device of the cutterhead hob are introduced in detail. Based on the CSM load formula, the micro-strain formula and the Wheatstone bridge formula, the relationship between the input load and the output voltage of the measurement device is deduced. Secondly, the three-dimensional load calibration test is carried out based on the load calibration device, and the performance analysis and characteristic parameter evaluation of the measurement device are carried out. Finally,the measurement contrast test of rock breaking load of cutter head is carried out,and the load signal is transmitted to the host computer wirelessly by using the wireless strain acquisition instrument. By comparing the load measurement error between the standard dynamometer and the designed sensor,the measurement reliability of the device is verified. The test results show that the nonlinear error of the sensor in all directions is less than 5%,the coupling error is less than 15%,and the test error in the three measurement directions is not more than 10%. The decoupling measurement and wireless transmission of the load of cutter head can be realized.