TBM hob cutter ring-rock opposite-grinding test device

Abstract

A TBM hob cutter ring-rock opposite-grinding test device comprises a rock clamping base 10, a cutter ring sample clamping head 11 and a power executing mechanism 12. The cutter ring sample clamping head 11 comprises a connecting base 1, a cutter base 2, a cutter ring sample 3, a cutter shaft 4 and a bearing 7; the cutter base 2 is fixedly connected below the connecting base 1; a groove is formed in the lower end of the cutter base 2; the cutter shaft 4 is movably mounted on the cutter base 2 in the circumferential direction through the bearing 7; the cutter ring sample 3 is coaxially mounted on the cutter shaft 4, and the outer edge of the cutter ring sample 3 is exposed out of the bottom end of the cutter base 2; the cutter ring sample 3 movably rotates along with the cutter shaft 4 relative to the circumferential direction of the cutter base 2; the rock clamping base 10 is arranged below the cutter ring sample 3; and the cutter ring sample clamping head 11 is connected with the power executing mechanism 12 through the connecting base 1. The device is high in reliability, simple in structure and manufacturing process and low in manufacturing cost; when the device is matched with a planer, the parameter control precision is high; and when the cutter spacing S of the cutter ring sample 3 is set to be zero or non-zero, three opposite-grinding test modes can be realized.

Description

technical field [0001] The invention belongs to the intersecting field of mechanical engineering, geotechnical engineering and tunnel engineering, and relates to a TBM hob cutter ring-rock grinding test device, in particular to a TBM hob cutter ring-rock grinding test device used in conjunction with a planer device. Background technique [0002] Full-face rock tunnel boring machine (Full-face Rock Tunnel Boring Machine, TBM), because it has a combination of rock breaking excavation, tunnel support, tunnel slag discharge and other functions in one, the tunneling efficiency and safety factor are high, and the cost With the advantages of good tunnel quality and low environmental pollution, it is widely used in hard rock tunnel projects such as water conveyance tunnels and railway tunnels across mountains and ridges. The TBM directly contacts and cuts the rock through the cutter ring of the disc-shaped hob (hereinafter referred to as the hob). Therefore, the comprehensive cutti...

AI Technical Summary

Problems solved by technology

[0007] ①In some scaled-scale simple TBM hob cutting test benches, in order to accelerate the intensity of knife-rock interaction, the scaled-scale simple TBM hob adopts active drive instead of passive drive close to the actual working conditions, resulting in the test results Deviation from engineering reality

[0008] ②In the cutting test bench of a simple TBM hob with reduced scale, in order to quickly prepare a sample of a simple TBM hob with a reduced scale, the scale ratio is given directly based on literature data or subjective assumptions, and the ratio is applied to uniformly adjust the shape of the hob The size is simply reduced, that is, the prepared sample of a simple TBM hob with a reduced scale is not related to the actual hob, and it is impossible to reverse the actual engineering law based on the test results

[0009] ③ In the simple TBM hob cutting test bench with reduced scale, in order to quickly carry out the knife-rock grinding test, the cutting parameters such as hob depth of cut and hob wire cutting speed are selected directly based on literature data or subjective assumptions, that is, the carried out The knife rock grinding test is quite different from the actual kinematic characteristics and cutting load level of the hob, which cannot reflect the actual working conditions

Although the above-mentioned traditional methods can effectively use rock samples, due to the rock's brittleness, the rock has a step-breaking characteristic, which leads to the formation of uneven random rock faces after the first rolling and breaking of rocks, and the random rock faces lead to subsequent " It is difficult to maintain a constant depth of cut or cutting load when "reciprocating rolling and breaking rocks in a single slit", that is, in "reciprocating rolling and breaking rocks in a single slit", only the cutting state of the first rolling and breaking rocks is theoretically controllable, and the subsequent There is a large randomness in the cutting state of each rolling rock breaking, which makes it difficult for subsequent qualitative and quantitative analysis

[0011] ⑤ In some scaled-scale simple TBM hob cutting test benches, the material performance of the scaled-down simple TBM hob sample is quite different from that of the actual engineering hob

[0012] ⑥The simple TBM hob cutting test bench in scaled scale is a non-standard test bench, which needs to be developed and customized separately, and has special components such as frame, transmission system, drive system, control system and clamping device. The structure is complex and the cost is high

Due to the lack of similarity theory guidance in the process of test bench design and cutting parameter selection, the biggest limitation of the scale-down simple TBM hob cutting test bench is that it is out of touch with the actual engineering and cannot reflect the real TBM tunneling environment. interaction mechanism

Images