CN-122014270-A - Method for reducing unbalanced side force of positive cutter, disc cutter, mounting method and TBM

CN122014270ACN 122014270 ACN122014270 ACN 122014270ACN-122014270-A

Abstract

The application relates to the technical field of working cutters of full-face tunnel boring machines, in particular to a method for reducing unbalanced side force of a positive cutter, a disc cutter, an installation method and a TBM. The included angle between the inner side edge angle surface of the ith right-angle hob and the axis of the cutterhead is formed by adjusting the right-angle hob of the ith right-angle hob The angle between the outer edge corner surface and the axis of the cutterhead is Among them, Is the half-edge angle of the positive cutter of the disc cutter, In the equation, The radius of the positive cutter of the disc cutter, and h is the tunneling distance of one circle of cutter head rotation. The application can reduce sideslip and rock scraping of the rock breaking blade of the disc cutter of the working full-face tunnel boring machine, greatly reduce the lateral force of the rock breaking disc cutter, reduce the abrasion of the disc cutter, prolong the service life of the disc cutter, and avoid abnormal abrasion failure such as tipping, chord grinding and the like of the disc cutter.

Inventors

ZHANG ZHAOHUANG
CAO JINGHUA
HAN JIALIN
ZHUO XINGJIAN
XU CHENGFA
JI WEI
SU CUIXIA
LIU SHUBING
JIA LIANHUI
ZHOU JUN

Assignees

华北电力大学

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (8)

1. A method for reducing unbalanced side force of positive cutter is characterized by that the positive cutter of the ith disc-shaped hob is regulated, so that the included angle between the inner side edge angle surface of the positive cutter of the ith disc-shaped hob and the axis of cutter head is The included angle between the outer side edge angle surface and the axis of the cutter head is , wherein, For the half-edge angle of the positive cutter of the ith disc-shaped hob, In which, in the process, And h is the tunneling distance of the full-section tunnel boring machine for one circle of cutter head rotation.
2. A disc cutter based on the method of claim 1, wherein the disc cutter is a positive disc cutter, and wherein the i-th positive disc cutter has an inner edge angle The edge angle of the outer side of the positive cutter of the disc cutter 。
3. Disc cutter according to claim 2, characterized in that the disc cutter is divided into two parts by a middle section, wherein the thickness of the part near the axis of the cutter disc is smaller than the thickness of the part far from the axis of the cutter disc.
4. A TBM comprising a plurality of disc cutters as claimed in claim 2 or 3.
5. A method for installing a disc cutter based on the method as claimed in claim 1, wherein the disc cutter is a positive disc cutter, and the cutter shaft of the positive disc cutter is tilted so that the positive disc cutter is tilted towards the axis of the cutter head Thereby the included angle between the inner side edge angle surface of the positive cutter of the ith disc-shaped hob and the axis of the cutter head is The included angle between the positive cutter outer side edge angle surface of the ith disc-shaped hob and the axis of the cutter head is 。
6. The disc cutter mounting method according to claim 5, wherein the angle adjustment between the cutter shaft of the i-th positive cutter and the cutter head axis is achieved by adjusting the mounting angle of the bearing seat of the i-th positive cutter.
7. A disc cutter mounting method according to claim 5, wherein the angle adjustment between the cutter shaft of the i-th positive cutter and the cutter head axis is achieved by adjusting the bearing angle of the i-th positive cutter.
8. A TBM comprising a plurality of positive disc cutter cutters, characterized in that the mounting manner of each positive disc cutter is adjusted based on the mounting method of the disc cutter according to any one of claims 5 to 7.

Description

Method for reducing unbalanced side force of positive cutter, disc cutter, mounting method and TBM Technical Field The application relates to the technical field of working cutters of full-face tunnel boring machines, in particular to a method for reducing unbalanced side force of a positive cutter, a disc cutter, an installation method and a TBM. Background The full face tunnel boring machine is a generic name of a full face rock boring machine (TBM) and a Shield (Shield), and the disc cutter is an operation cutter on the full face tunnel boring machine, and belongs to a consumable part. Because the design method is not in line with the operation of the design method, the consumption of the design method in engineering application is accelerated, wherein the total of the tipping, the chord grinding and the bearing damage accounts for about 30% of the damage amount. It was found that the main cause of this situation is the presence of "sliding friction" and "lateral scraping" of the working disc cutter rock breaking blade, and the resultant lateral imbalance forces are the main cause of the damage. Disclosure of Invention The application provides a method for reducing unbalanced side force of a positive cutter, a disc cutter, an installation method and a TBM, which can reduce sideslip and rock scraping of a rock breaking blade of the disc cutter of a full-face tunnel boring machine, greatly reduce the side force of the rock breaking disc cutter, and solve the engineering problems of large bearing damage and large disc cutter consumption of a cutter head of the full-face tunnel boring machine to a certain extent. In a first aspect, the present application provides a method for reducing unbalanced side forces of a positive cutter, comprising adjusting a positive cutter of an i-th disc cutter to make an included angle between an inner side edge surface of the positive cutter of the i-th disc cutter and an axis of a cutter disc beThe included angle between the outer side edge angle surface and the axis of the cutter head is, wherein, For the half-edge angle of the positive cutter of the ith disc-shaped hob,In which, in the process,And h is the tunneling distance of the full-section tunnel boring machine for one circle of cutter head rotation. In a second aspect, the application provides a disc hob based on the method, which is a positive hob of the disc hob, wherein the i-th positive hob has an inner side edge angleThe edge angle of the outer side of the positive cutter of the disc cutter。 In a preferred embodiment, the disc cutter is divided into two parts by a central section, wherein the thickness of the part near the axis of the cutter head is smaller than the thickness of the part far from the axis of the cutter head. In a third aspect, the application provides a TBM comprising a plurality of disc cutter units. The application provides a disc cutter installing method based on the method, which comprises the steps of tilting the cutter shaft of the i-th disc cutter positive cutter to enable the i-th disc cutter positive cutter to tilt towards the cutter disc axisThereby the included angle between the inner side edge angle surface of the positive cutter of the ith disc-shaped hob and the axis of the cutter head isThe included angle between the positive cutter outer side edge angle surface of the ith disc-shaped hob and the axis of the cutter head is。 In a preferred embodiment, the angle adjustment between the cutter shaft of the i-th positive cutter and the cutter head axis is achieved by adjusting the mounting angle of the bearing seat of the i-th positive cutter. In a preferred embodiment, the bearing angle of the positive cutter of the ith disc cutter is adjusted, so that the angle between the cutter shaft of the positive cutter of the ith disc cutter and the cutter disc axis is adjusted. In a fifth aspect, the present application further provides a TBM, including a plurality of disc cutter positive cutters, where an installation manner of each disc cutter positive cutter is adjusted based on any one of the disc cutter installation methods. The application has the following beneficial effects: According to the application, through changing the shape of the positive cutter of the disc cutter or adjusting the installation mode of the positive cutter of the disc cutter, the included angles between the inner side edge angle surface and the outer side edge angle surface of the positive cutter of the disc cutter and the axis of the cutter head are adjusted, so that the sideslip and rock scraping of the rock breaking edge of the disc cutter of the working full-section tunnel boring machine can be reduced, the lateral force of the rock breaking disc cutter is greatly reduced, the phenomenon of 'waving' of the cutter head of the working full-section tunnel boring machine along with the swing vibration of the axis of the cutter head is solved, and the engineering problems of large bearing damage of the cutter head