Experiment system and method for rock breaking efficiency analysis of TBM disc cutter

Abstract

The invention relates to an experiment system and method for the rock breaking efficiency analysis of a TBM disc cutter, and the system comprises a data collection box which is used for recording the data collected by a sensor; a rotor part which comprises an upper rod piece and a press machine; a rotor part which comprises a central rod piece, an M-shape cutter disc, and a reduced scale hob, wherein the central rod piece is connected to the bottom of the upper rod piece through a connection part and rotates relative to the axis of the upper rod piece, two door openings of the M-shape cutter disc are respectively provided with an installation shaft, installed in a lateral direction, in a fixed manner, and the reduced scale hob is disposed on the installation shafts and can freely roll in the radial direction of the installation shafts; a monitoring system which comprises a rotating speed sensor for measuring the rotating speed of the reduced scale hob and a pressure sensor which is used for measuring the changes of pressure withstood by the installation shafts in a rotating cutting process; and a power system which supplies power to the M-shape cutter disc. The experiment system is smaller in size, and can be widely used on various types of press machines. According to the data recorded by the data collection box, the system can obtain the rock breaking efficiency through combining with an efficiency analysis method.

Description

technical field [0001] The invention relates to an experimental system and method for simulating rock breaking by a TBM disc-shaped hob, in particular to an experimental system and method for analyzing the rock-breaking efficiency of a TBM disc-shaped hob. Background technique [0002] Disc-shaped hobs are currently the most commonly used cutters on TBMs for hard rock tunnel boring machines. The study of the rock-breaking mechanism under the action of disc-shaped hobs is of great significance for improving rock-breaking efficiency and guiding the mechanical manufacture of cutters. Studying the hob's stress, wear, penetration depth and rock fracture zone development can greatly improve the rock breaking effect and tunneling speed. [0003] In terms of TBM test research, the most representative early stage is the single-blade linear cutting test device (LCM) designed by Ozdemir et al. of the Colorado School of Mines. Do double-knife straight-line rock-breaking motion, and can...

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Problems solved by technology

[0003] In terms of TBM test research, the most representative early stage is the single-blade linear cutting test device (LCM) designed by Ozdemir et al. of the Colorado School of Mines. Do double-knife straight-line rock-breaking motion, and can measure hob three-way force, penetration, knife spacing and other parameters; but in actual engineering, the disc-shaped hob performs rotary cutting motion, and this device cannot break rock by turning , can not truly simulate the working process of the tool

The mini-hob rotary cutting test device (RIAT) designed by F.J.Macias of Trondheim Normal University in Norway, the device installs the mini hob on the scaled cutter head, the cutter head is fixed, and the lower rock sample is rotated In order to achieve the effect of rotary cutting, the rock-breaking process of the disc-shaped hob can be better simulated, and the hob wear and penetration depth can be recorded; the main factor affecting the rock-breaking effect and hob wear is the force of the hob , the device cannot measure key parameters such as the stress and rotational speed of the hob, and the purpose of cutting the rock is achieved by rotating the lower rock sample, which is still far behind the direct rotary cutting of the disc-shaped hob in engineering practice.

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