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Heading machine disc cutter wear extent pre-estimate calculating method

A disc-shaped hob and calculation method technology, which is applied in the direction of calculation, measuring devices, special data processing applications, etc., can solve problems such as shortening construction time, reducing project cost budget, and having little guiding significance

Inactive Publication Date: 2012-12-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the TBM tool wear is basically a qualitative analysis, and quantitative calculation cannot be done due to the influence of various factors.
For example, the wear amount of the replaced disc hob is measured, and the relevant data of the wear amount of the disc hob during the rock breaking process is obtained. Obviously, this has little guiding significance for the actual construction process, and the wear condition of the disc hob cannot be predicted. It also has no obvious effect on shortening the construction time and reducing the project cost budget

Method used

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  • Heading machine disc cutter wear extent pre-estimate calculating method
  • Heading machine disc cutter wear extent pre-estimate calculating method
  • Heading machine disc cutter wear extent pre-estimate calculating method

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Embodiment Construction

[0050] The calculation method of the present invention will be further described through the following examples. It should be noted that this example is descriptive and does not limit the protection scope of the present invention.

[0051] The operating parameters of the roadheader during the construction process are as follows: the total thrust of the cutter head F = 8600KN, the cutter head torque M' = 4000KNm, the cutter head rotates 4r / min, which is the rotation frequency f 1 = 1 / 15, cutterhead advancing speed V = 1m / h, roadheader structural parameters are as follows: cutterhead diameter D = 6.31m, total number of cutters on cutterhead n 4 =43, disc hob radius r=216mm, energy wear rate 1=6×10 -5 mm 3 / J, disc-shaped hob blade width b=20mm, blade angle θ=20°, the following will take the disc-shaped hob with the advancing distance of 1km and the disc-shaped hob installation radius R=1577.5mm as an example, and the calculation is given For the detailed steps of disc hob wear...

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Abstract

The invention discloses a heading machine disc cutter wear extent pre-estimate calculating method. According to the method, a known heading machine structure parameter and a known technique parameter in a construction process are referred, and a corresponding relation between disc cutter rotation frequency and wear extent is directly established. The calculating method comprises the following steps: (1) measuring the disc cutter acceleration change in a rock breaking process, and obtaining disc cutter rotation frequency; (2) establishing a corresponding relation between the disc cutter rotation frequency and friction work; (3) establishing a corresponding relation between the disc cutter rotation frequency and the wear extent. The disc cutter wear extent at different times and different positions are obtained finally. According to the invention, an accurate disc cutter wear extent pre-estimate calculating formula is established, operation and data processing are simple, and a problem that determining the disc cutter wearing degree and predicting disc cutter life are needed in construction is solved. The invention provides a theory for optimization design of a cutterhead and cutterarrangement scheme and prolongation of disc cutter service life.

Description

technical field [0001] The invention relates to a method for calculating the wear amount of a disc-shaped hob of a full-face rock tunnel boring machine. Background technique [0002] With the continuous expansion of the scale of my country's infrastructure and the continuous increase of deep tunnel (hole) projects, full-face tunnel boring machines have been widely used in engineering practice. Full-section tunnel boring machines are generally divided into two categories: those used for soil formation construction are called shield machines, and those used for rocky formation construction are called full-section rock tunnel boring machines (abbreviated as TBM). TBM tools are vulnerable consumables. During the construction process, the total time spent on tool inspection, replacement and tool head maintenance accounts for about one-third of the project construction time, and tool costs account for about one-third of the project construction cost. One, the number of cutter rin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G06F19/00
Inventor 李丰华蔡宗熙亢一澜黄田
Owner TIANJIN UNIV
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