Tunnel boring machine hob abrasion type judgment and abrasion loss monitoring system and method

A tunnel boring machine, wear amount technology, applied in the direction of measuring devices, instruments, electrical devices, etc., can solve the problems of difficult to use, poor accuracy and practicability, high hob processing requirements, etc., to achieve strong applicability, low price, reliable results

Active Publication Date: 2022-05-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The open warehouse inspection method is the most common method, but it needs to stop and enter the soil warehouse for manual inspection, which is time-consuming, laborious, expensive, and needs to bear safety risks such as water gushing and collapse on the working surface
The odor additive method is to add irritating substances to the lubricating oil of the hob, and judge whether the hob is worn by the smell of muck. However, it is limited by the soil conditioner and formation conditions, and the accuracy and practicability of this method are poor.
The pressure line monitoring method monitors the oil pressure inside the hob or the on-off of the line by adding lines. When the oil pressure is lost or the line is disconnected, it means that the hob is excessively worn. However, this method has high requirements for hob processing, and additional lines Complex layout, difficult to use in engineering
[0004] Scholars at home and abroad have developed a variety of hob wear real-time monitoring devices and methods based on the principles of acousto-optics, electromagnetics and wireless transmission. sex
The main difficulties faced by the existing methods mainly include the following two points: First, the hob cutting working environment is often filled with conductors such as muddy water and rock

Method used

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  • Tunnel boring machine hob abrasion type judgment and abrasion loss monitoring system and method
  • Tunnel boring machine hob abrasion type judgment and abrasion loss monitoring system and method
  • Tunnel boring machine hob abrasion type judgment and abrasion loss monitoring system and method

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Example Embodiment

[0028] Figure 1 It is a flowchart of the tunnel boring machine hob wear type discrimination and wear quantity monitoring method. as Figure 1 The method includes: obtaining the frequency and frequency distribution of the tBM boring unit time or unit distance of the hob rotation; according to the influence of different wear types of the hob on the interval time between the rotation of the hob, the qualitative judgment of the wear type of the hob is completed by the characteristics of the wear frequency distribution of the hob; and the quantitative calculation of the average wear amount is carried out by using the rotation frequency of the hob.

[0029] Figure 2 The characteristics of the rotation frequency of the hob for different wear types are shown. as Figure 2According to the influence of different wear forms of the hob on the time required for the hob to rotate for one week can be divided into the following four types: Type A is uniform wear, the performance is characteriz...

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Abstract

The invention discloses a tunnel boring machine hob abrasion type judgment and abrasion loss monitoring system and method. The method comprises the steps that the rotating frequency and frequency distribution of a hob in tunneling unit time or unit distance of a tunnel boring machine are obtained; according to the influence of different abrasion types of the hobbing cutter on the rotating interval time of the hobbing cutter, qualitative judgment of the abrasion types of the hobbing cutter is completed through the abrasion frequency distribution characteristics of the hobbing cutter; and the average abrasion loss is quantitatively calculated by using the rotation frequency of the hob. According to the method, hob abrasion type judgment and abrasion average value calculation can be completed at the same time, and the method is simple, reliable and suitable for monitoring all hob abrasion types of the tunnel boring machine; meanwhile, the device is easy to operate, low in price and high in applicability, and has important significance in on-site hob abrasion monitoring and cost control.

Description

technical field [0001] The invention relates to the technical field of hob wear monitoring of a full-section tunnel boring machine, in particular to a system and method for discriminating wear types and monitoring wear amount of a tunnel boring machine hob. Background technique [0002] The full-face tunnel boring machine has become the main tool for tunnel construction due to its high degree of mechanization, fast excavation speed, strong stratum adaptability, safety and high efficiency. As the main tool for the tunnel boring machine to excavate the ground, the hob will wear out due to the abrasive effect of the ground during the tunneling process. When the wear reaches a certain limit, it needs to be replaced and repaired in time, otherwise the tunnel boring machine will be damaged. The thrust increases, the torque increases, the penetration decreases, and the tunneling speed decreases. At the same time, excessive wear will increase the probability of the hob being scrappe...

Claims

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Application Information

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IPC IPC(8): G01B7/00
CPCG01B7/00
Inventor 张晓平王浩杰刘泉声唐少辉
Owner WUHAN UNIV
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