Logarithmic spiral arrangement method of positive cutters on cutterhead of tunnel boring machine

A technique of tunnel boring machine and layout method, which is applied to tunnels, earthwork drilling, mining equipment, etc., can solve problems such as large overturning moment, inconsistent wear, and uneven force on tools, and achieve uniform force, simple layout method, and The effect of uniform force on the cutterhead as a whole

Inactive Publication Date: 2018-07-17
南通土力机械制造有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

There are different problems in the actual use process, such as uneven force on the cutter, inconsistent wear, large overturning moment, etc., so it is necessary to study a more reasonable arrangement of the positive cutter on the cutter head

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  • Logarithmic spiral arrangement method of positive cutters on cutterhead of tunnel boring machine
  • Logarithmic spiral arrangement method of positive cutters on cutterhead of tunnel boring machine
  • Logarithmic spiral arrangement method of positive cutters on cutterhead of tunnel boring machine

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Embodiment Construction

[0032] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0033] The logarithmic spiral arrangement method of positive knives on the tunnel boring machine cutterhead according to the present invention uses m logarithmic spirals combined with n concentric circles to determine the arrangement position of the cutters on the tunnel boring machine cutterhead; The concentric circles are the rotary paths of different positive knives on the cutter head; the logarithmic helix equation is ρ=ρ 0 ×e θcotα , where: ρ is the polar diameter, which means the distance from any point on the logarithmic spiral to the origin of coordinates; ρ 0 is the initial polar diameter; θ is the polar angle; α is the helix angle, indicating the angle between the polar diameter of any point on the logarithmic helix and the tangent direction of the point; (ρ, θ) is the polar coordinate position of any point on the helix; The included a...

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Abstract

The invention relates to a logarithmic spiral arrangement method of positive cutters on a cutterhead of a tunnel boring machine. The arrangement position of the cutters on the cutterhead of the tunnelboring machine is determined by combining m logarithmic spiral lines with n concentric circles; and the concentric circles are rotary paths of different positive cutters on the cutterhead. The logarithmic spiral line equation is rho=rho 0*e<theta cot alpha>, wherein rho is the polar diameter, indicating the distance from any point on the logarithmic spiral line to the origin of the coordinates; rho 0 is the initial polar diameter; theta is the polar angle; alpha is the spiral angle, which indicates the included angle between the polar diameter of any point on the logarithmic spiral line and the tangent direction of that point; (rho, theta) is the polar coordinate position of any point on the spiral line; and the included angle between the polar diameter of any point on the logarithmic spiral line and the tangent direction of the point is a certain value alpha, which can make the included angles beta of the moving directions of all cutters on the cutterhead and the tangent lines of thelogarithmic spiral lines at the positions where the cutters are located be equal. The arrangement method is simple, the included angles beta of all the cutters on the cutterhead can be kept consistent, and the overall stress of the cutters on the cutterhead is more uniform.

Description

technical field [0001] The invention relates to the technical field of tunnel boring machine cutter head design, in particular to a logarithmic spiral arrangement method of positive knives on the tunnel boring machine cutter head. Background technique [0002] Tunnel excavation technology plays an important role in urban infrastructure construction. Tunnel boring machine (also known as shield machine) is the main development trend of tunnel boring equipment at present. The cutter is a key component of the shield machine. Whether its arrangement on the cutter head is Reasonability will directly affect the service life of the tool, and then affect the construction quality, construction cost and construction efficiency. The reasonable arrangement of cutters on the cutter head is the core technology to realize the stable and efficient excavation of the cutter head. The main design principles of cutter arrangement are: 1) Minimize the overturning moment as much as possible; ) Tr...

Claims

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Application Information

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IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 宋华高明昕付丽华杨建张影刘磊李艳辉章岱兴
Owner 南通土力机械制造有限公司
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