CN103343693A - Design method for telescopic multiple-cutting-edge expanding excavation hob partition cutting cutterhead - Google Patents

Abstract

The invention belongs to the field of heading machine cutterhead structural design methods, and particularly relates to a design method for a telescopic multiple-cutting-edge expanding excavation hob partition cutting cutterhead. According to the method, overall technical performance requirements and construction requirements of the cutterhead are considered, the fact that the cutterhead designed according to the method has enough rock breaking capacity is guaranteed, and vibration of the cutterhead is reduced; an original front hob and a center hob of the cutterhead are still kept, all edge hobs on edges of an original cutterhead are removed, and a first telescopic multiple-cutting-edge expanding excavation hob assembly, a second telescopic multiple-cutting-edge expanding excavation hob assembly and a third telescopic multiple-cutting-edge expanding excavation hob assembly are respectively installed. The process that rocks are cut through the cutterhead is divided into two steps by means of the method, under the circumstance that breaking conditions are met, the vibration of the cutterhead can be reduced, thus the tunneling service life of a heading machine cutterhead is prolonged, noise is reduced, and economic losses in engineering are reduced. The design method of the cutterhead can be applied to the design field of various full-face rock tunnel boring machine cutterheads.

Description

Scalable multiple-cutting-edge expands the method for designing of digging hobboing cutter subregion cutting cutterhead

Technical field

The invention belongs to full face tunnel boring machine cutterhead method for designing field, particularly scalable multiple-cutting-edge expands the method for designing of digging hobboing cutter subregion cutting cutterhead.

Background technology

Cutterhead is the installation carrier of all broken rock cutters as one of topmost parts of full face tunnel boring machine.Full face tunnel boring machine is many in actual engineering to cause bigger vibration by limit hobboing cutter lateral force.If the cutterhead vibration is excessive, not only influences its application life, and affect the performance of its performance.Therefore, the appropriate design at cutterhead limit hobboing cutter place has very big influence to the vibration of cutterhead.

The design of development machine cutter head structure, China Patent No.: CN201110435177.0, patent name is " the gradual shield cutter of a kind of multi-stage separation ", and positive English, Lu grasped identical people and disclosed the gradual shield cutter of a kind of multi-stage separation inventor's Wei, and it is made up of telescopic multistage shield cutter.During work, the one-level cutterhead rotates rock mass is cut, when driving to certain apart from the time, the secondary cutterhead begins to tunnel forward, and so forth, realizes the progressive excavation of multistage cutterhead.This invention has changed cutter head structure, needs the main drive system of many covers, and limited space is difficult to arrange, involves great expense; Muck removal is difficult to realize that this cutterhead is first turning centre rock simultaneously, and cutting border, back rock is bigger to the disturbance of tunnel peripheral rock, causes the bigger vibration of cutterhead easily.Chinese patent: CN201110403407.3, patent name is: " shield structure limit hobboing cutter displacement monitoring method and device ", people such as inventor Jia Lian brightness disclose the method and apparatus of a kind of shield machine limit hobboing cutter displacement monitoring, and it is accurate that this monitoring system has a signal, advantage such as easy to maintenance.But the not mentioned cutterhead that how to reduce of this patent vibrates.Because full face tunnel boring machine in the course of the work, the lateral force that the limit hobboing cutter is subjected to is the key factor that causes the cutterhead vibration, cutterhead vibration will aggravate the damage of hobboing cutter and the inner miscellaneous part of cutterhead, therefore usefulness in the past the cutterhead designed of method still have the bigger shortcoming and defect of vibration.

Summary of the invention

The difficult problem that the present invention will solve is invented a kind of scalable multiple-cutting-edge and is expanded the method for designing of digging hobboing cutter subregion cutting cutterhead at the defective of existing cutterhead designing technique.This method is to remove all limit hobboing cutters at original cutterhead marginal position, first, second, third scalable multiple-cutting-edge expansion is installed respectively digs the hobboing cutter assembly, the process of cutterhead cutting rock is resolved into two steps realizations, thereby make cutterhead when driving, alleviate vibrations, reduce noise, improve the operating efficiency of full face tunnel boring machine.

The technical solution used in the present invention is that scalable multiple-cutting-edge expands the method for designing of digging hobboing cutter subregion cutting cutterhead, and this method is considered cutterhead overall technology performance requirement, construction requirement, guarantees that the cutterhead of this method design has enough rock breaking capacities, and reduces the cutterhead vibration; Cutterhead still keeps original positive hobboing cutter and center hobboing cutter, remove all limit hobboing cutters at original cutterhead marginal position, symmetry is installed first, second, third scalable multiple-cutting-edge expansion and is dug hobboing cutter assembly 2,5,10, first, second, third scalable multiple-cutting-edge expands and digs hobboing cutter assembly 2,5,10 and all expanded by scalable multiple-cutting-edge and dig hobboing cutter extending equipment 11 and scalable multiple-cutting-edge and expand and dig hobboing cutter 12 and form, and structure is identical; Scalable multiple-cutting-edge expands and digs hobboing cutter 12 and be installed in scalable multiple-cutting-edge and expand and dig in the hobboing cutter extending equipment 11;

Expand the cutter head structure and the concrete execution conditions that dig hobboing cutter according to scalable multiple-cutting-edge designing of hobboing cutter 12 dug in scalable multiple-cutting-edge expansion:

(1) scalable multiple-cutting-edge expands the angle delta θ that digs between hobboing cutter 12 adjacent two blades:

Δθ＝θ （1）

Wherein: θ is the angle (general value is 5～8 °) between traditional cutterhead adjacent edge hobboing cutter;

(2) scalable multiple-cutting-edge expands the total quantity n that digs hobboing cutter 12 blades _k:

$n_k=\mathrm{int}\left(\frac{{\mathrm{\θ}}_{\max }}{\mathrm{\Δ\θ}}\right)+1---\left(2\right)$

Wherein: θ _MaxBe that hobboing cutter 12 maximum setting angle on cutterhead transition circle cambered surface is dug in scalable multiple-cutting-edge expansion;

(3) expand according to scalable multiple-cutting-edge and dig hobboing cutter 12 maximum setting angles and scalable multiple-cutting-edge and expand and dig hobboing cutter 12 quantity and can try to achieve revised scalable multiple-cutting-edge and expand the angle delta θ ' that digs between hobboing cutter 12 adjacent two blades and be:

$\mathrm{\Δ}{\mathrm{\θ}}^{\′}=\frac{{\mathrm{\θ}}_{\max }}{n_k}---\left(3\right)$

(4) adjacent scalable multiple-cutting-edge expand dig between 12 liang of blades of hobboing cutter between s _pDistance is:

Wherein: r is that scalable multiple-cutting-edge expansion is dug hobboing cutter at the cutterhead transition arc radius;

(5) scalable multiple-cutting-edge expands the quantity n that digs hobboing cutter 12 and is:

$n=\mathrm{int}\left(\frac{n_k}{m}\right)---\left(5\right)$

Wherein: m is that every scalable multiple-cutting-edge is expanded digs hobboing cutter blade quantity, and the m value is 1～4;

(6) i expand scalable multiple-cutting-edge the angle theta of digging hobboing cutter 12 and cutterhead card normal plane _iFor:

${\mathrm{\θ}}_i=\frac{{\mathrm{\θ}}_{\max }}{2n}(2i-1)$ i＝1、2...n （6）

(7) i dig the layout phase angle ε of hobboing cutter 12 on the cutterhead card to scalable multiple-cutting-edge expansion _iFor:

${\mathrm{\ϵ}}_{i+1}={\mathrm{\ϵ}}_i+\frac{2\mathrm{\π}}{n}$ i＝1、2...n （7）

Scalable multiple-cutting-edge expansion is dug the concrete installation site of hobboing cutter and can be done slight adjustment according to cutterhead hobboing cutter deployment scenarios; Hobboing cutter 12 is dug in the scalable multiple-cutting-edge expansion that designs to be installed on the cutterhead according to the correlation computations result.

For reaching brokenly the effect of rock, and reduce the cutterhead vibration, cutterhead cutting rock process is resolved into two steps: step 1, expand scalable multiple-cutting-edge and dig hobboing cutter and release to cut marginal portion, tunnel rock; Step 2 is dug the hobboing cutter withdrawal with scalable multiple-cutting-edge expansion, and advances the operator dish to use positive hobboing cutter and center hobboing cutter to continue the rock of other parts of cutting tunnel, repeats the excavation that above-mentioned two steps are finished the tunnel.

The invention has the beneficial effects as follows guaranteeing under the precondition of cutterhead at fractured rock, expand with scalable multiple-cutting-edge at the cutterhead periphery and dig the rock that hobboing cutter replaces hobboing cutter cutting marginal portion, tunnel, original cutterhead limit.Because expanding, scalable multiple-cutting-edge digs the support of hobboing cutter employing hydraulic pressure, and scalable multiple-cutting-edge expansion is dug the hobboing cutter cutting rock and is divided into the independently course of work, therefore the cutterhead of the present invention's design has effectively reduced the vibration that cutterhead produces because of lateral force, thereby prolong the driving life-span of development machine cutterhead, reduce noise, reduced the economic loss in the engineering.

Description of drawings

Fig. 1: hobboing cutter subregion cutting cutterhead, Fig. 2 are dug in scalable multiple-cutting-edge expansion: scalable multiple-cutting-edge expansion is dug hobboing cutter and released state, Fig. 3: hobboing cutter modular construction sketch is dug in scalable multiple-cutting-edge expansion; Among the figure: 1-scraping quarrel Dou, 2-the first scalable multiple-cutting-edge expands and digs hobboing cutter assembly, 3-manhole, 4-positive hobboing cutter, 5-the second scalable multiple-cutting-edge and expand and dig hobboing cutter assembly, 6-cutterhead rear board, 7-center hobboing cutter, 8-cutterhead arc transition face, 9-cutterhead top panel, 10-the three scalable multiple-cutting-edge and expand and dig hobboing cutter assembly, 11-scalable multiple-cutting-edge and expand and dig hobboing cutter ejecting device, 12-scalable multiple-cutting-edge and expand and dig hobboing cutter

Specific embodiment

Describe the specific implementation process that the scalable multiple-cutting-edge of the present invention expands the method for designing of digging hobboing cutter subregion cutting cutterhead in detail with technical scheme by reference to the accompanying drawings.Cutterhead is the installation carrier of all broken rock cutters as one of topmost parts of full face rock tunnel boring machine.Full face rock tunnel boring machine many lateral forces that are subjected to by limit hobboing cutter cutting rock in actual engineering cause bigger vibration.If the cutterhead vibration is excessive, not only influences its application life, and affect the performance of its performance.

Therefore, the present invention is directed to cutterhead work and cause bigger defectives such as vibration by the lateral force that limit hobboing cutter cutting rock is subjected to often, consider cutterhead overall technology performance requirement, construction requirement, the cutterhead that guarantees the design of this method has enough rock breaking capacities and reduces the cutterhead vibration that lateral force that cutterhead is subjected to by limit hobboing cutter cutting rock causes, the limit hobboing cutter that the hobboing cutter assembly replaces original cutterhead digs with scalable multiple-cutting-edge expansion in edge at traditional cutter head structure, and cutterhead still keeps original positive hobboing cutter and center hobboing cutter; Scalable multiple-cutting-edge expands and digs the hobboing cutter assembly and expanded by scalable multiple-cutting-edge and dig hobboing cutter extending equipment and scalable multiple-cutting-edge and expand and dig hobboing cutter and forms, because scalable multiple-cutting-edge expands and dig hobboing cutter and supported by hydraulic pressure, vibrates so can effectively reduce cutterhead during knife cutting tunnel marginal position.

The present invention is divided into two steps with the cutterhead cutting rock course of work: step 1, and hobboing cutter is dug in scalable multiple-cutting-edge expansion release to cut marginal portion, tunnel rock; Step 2 is dug the hobboing cutter withdrawal with scalable multiple-cutting-edge expansion, and advances the operator dish to use positive hobboing cutter and center hobboing cutter to continue the rock of other parts of cutting tunnel, repeats the excavation that these two steps are finished the tunnel.Because cutterhead work has been divided into two processes, when cutterhead cut the rock of tunnel body position, cutterhead can not cause bigger vibration because scalable multiple-cutting-edge expands the lateral force of digging the generation of hobboing cutter cutting rock.

Describe specific implementation process of the present invention in detail with technical scheme by reference to the accompanying drawings.The cutter radius R=4175mm that the present invention uses; Cutterhead knuckle radius r=500mm; The maximum established angle θ of hobboing cutter is dug in scalable multiple-cutting-edge expansion _Max=70 °; Hobboing cutter wear extent ζ _Max=15mm; Getting adjacent scalable multiple-cutting-edge, to expand the angle that digs between the hobboing cutter be θ=6 °; Concrete scalable multiple-cutting-edge expands and digs the scalable multiple-cutting-edge of hobboing cutter subregion cutting cutterhead and expand and dig hobboing cutter 12 relevant parameters and be calculated as follows:

(1) angle delta θ=6 ° (1) between hobboing cutter 12 adjacent two blades are dug in scalable multiple-cutting-edge expansion

(2) scalable multiple-cutting-edge expands the total quantity n that digs hobboing cutter 12 blades _k:

(3) according to θ _MaxAnd (2) can try to achieve revised scalable multiple-cutting-edge and expand the angle of digging between hobboing cutter 12 adjacent two blades:

(4) adjacent scalable multiple-cutting-edge expand dig between 12 liang of blades of hobboing cutter between s _pDistance is:

(5) scalable multiple-cutting-edge expands the quantity n that digs hobboing cutter 12 and is:

$n=\mathrm{int}\left(\frac{n_k}{m}\right)=\mathrm{int}\left(\frac{12}{4}\right)=3---\left(5\right)$

(6) i expand scalable multiple-cutting-edge the angle theta of digging hobboing cutter 12 and cutterhead card normal plane _iFor:

${\mathrm{\θ}}_i=\frac{{\mathrm{\θ}}_{\max }}{2n}(2i-1)=\frac{35}{3}(2i-1)$ i＝1、2...n （6）

It is θ that the hobboing cutter setting angle is dug in the scalable multiple-cutting-edge expansion of the first ₁=11.7 °; It is θ that the hobboing cutter setting angle is dug in second scalable multiple-cutting-edge expansion ₂=35.0 °; The 3rd expands scalable multiple-cutting-edge that to dig the hobboing cutter setting angle be θ ₃=58.3 °.

(7) calculate scalable multiple-cutting-edge expansion and dig the setting angle of hobboing cutter on the cutterhead card:

${\mathrm{\ϵ}}_{i+1}={\mathrm{\ϵ}}_i+\frac{2\mathrm{\π}}{n}$ i＝1、2...n（7）

According to concrete cutterhead hobboing cutter deployment scenarios, can calculate the scalable multiple-cutting-edge of the first and expand and dig the setting angle of hobboing cutter on the cutterhead face and be: ε ₁=63 °, second scalable multiple-cutting-edge expansion is dug the setting angle of hobboing cutter on the cutterhead face and is: ε ₂=187 °, the 3rd digs the setting angle of hobboing cutter on the cutterhead face to scalable multiple-cutting-edge expansion is: ε ₃=302 °.

The hobboing cutter assembly is dug in the scalable multiple-cutting-edge expansion that calculates to be installed on the cutterhead according to the setting angle of cutterhead card and the setting angle at cutterhead transition arc place, mounted scalable multiple-cutting-edge expansion is dug the hobboing cutter cutterhead and in the concrete course of work cutterhead cutting rock is being resolved into two steps, and cutterhead is at first released the multiple-cutting-edge expansion by control device and dug cutter cutting face edge rock; Cutterhead is regained the multiple-cutting-edge expansion and is dug cutter under the control device effect then, and makes positive hobboing cutter and center hobboing cutter continue cutting rock the propelling of operator dish, repeats the excavation that these two steps are finished the tunnel.Therefore the scalable multiple-cutting-edge expansion of this method design is dug the hobboing cutter cutterhead satisfying the driving life-span that can reduce the cutterhead vibration under the condition of fractured rock, prolong the development machine cutterhead, reduces noise, reduces the economic loss in the engineering.

The method for designing of cutterhead of the present invention can be applicable in the multiple full face rock tunnel boring machine cutterhead design field.

Claims (1)

1. a scalable multiple-cutting-edge expands the method for designing of digging hobboing cutter subregion cutting cutterhead, it is characterized in that, this method is considered cutterhead overall technology performance requirement, construction requirement, guarantees that the cutterhead of this method design has enough rock breaking capacities, and reduces the cutterhead vibration; Cutterhead still keeps original positive hobboing cutter and center hobboing cutter, remove all limit hobboing cutters at original cutterhead marginal position, first, second, third scalable multiple-cutting-edge expansion is installed respectively digs hobboing cutter assembly (2,5,10), first, second, third scalable multiple-cutting-edge expands and digs hobboing cutter assembly (2,5,10) and all expanded by scalable multiple-cutting-edge and dig hobboing cutter extending equipment (11) and the expansion of scalable multiple-cutting-edge and dig hobboing cutter (12) and form, and structure is identical; Scalable multiple-cutting-edge expands and digs hobboing cutter (12) and be installed in scalable multiple-cutting-edge and expand and dig in the hobboing cutter extending equipment (11);

Expanding the cutter head structure that digs hobboing cutter and concrete execution conditions according to scalable multiple-cutting-edge expands scalable multiple-cutting-edge and digs hobboing cutter (12) and design:

(1) scalable multiple-cutting-edge expands the angle delta θ that digs between adjacent two blades of hobboing cutter (12):

Δθ＝θ （1）

Wherein: θ is the angle between the adjacent edge hobboing cutter of traditional cutterhead, and general value is 5～8 °;

(2) scalable multiple-cutting-edge expands the total quantity n that digs hobboing cutter (12) blade _k:

$n_k=\mathrm{int}\left(\frac{{\mathrm{\θ}}_{\max }}{\mathrm{\Δ\θ}}\right)+1---\left(2\right)$

Wherein: θ _MaxBe that hobboing cutter (12) maximum setting angle on cutterhead transition circle cambered surface is dug in scalable multiple-cutting-edge expansion;

(3) expand according to scalable multiple-cutting-edge and dig the maximum setting angle of hobboing cutter (12) and scalable multiple-cutting-edge and expand and dig hobboing cutter (12) quantity and can try to achieve revised scalable multiple-cutting-edge and expand the angle delta θ ' that digs between adjacent two blades of hobboing cutter (12) and be:

$\mathrm{\Δ}{\mathrm{\θ}}^{\′}=\frac{{\mathrm{\θ}}_{\max }}{n_k}---\left(3\right)$

(4) adjacent scalable multiple-cutting-edge expand dig between hobboing cutter (12) two blades between s _pDistance is:

Wherein: r is that scalable multiple-cutting-edge expansion is dug hobboing cutter at the cutterhead transition arc radius;

(5) scalable multiple-cutting-edge expands the quantity n that digs hobboing cutter (12) and is:

$n=\mathrm{int}\left(\frac{n_k}{m}\right)---\left(5\right)$

Wherein: m is that every scalable multiple-cutting-edge is expanded digs hobboing cutter blade quantity, and the m value is 1～4;

(6) i expand scalable multiple-cutting-edge the angle theta of digging hobboing cutter (12) and cutterhead card normal plane _iFor:

${\mathrm{\θ}}_i=\frac{{\mathrm{\θ}}_{\max }}{2n}(2i-1)$ i＝1、2...n （6）

(7) i dig the layout phase angle ε of hobboing cutter (12) on the cutterhead card to scalable multiple-cutting-edge expansion _iFor:

${\mathrm{\ϵ}}_{i+1}={\mathrm{\ϵ}}_i+\frac{2\mathrm{\π}}{n}$ i＝1、2...n （7）

Scalable multiple-cutting-edge expansion is dug the concrete installation site of hobboing cutter and can be done slight adjustment according to cutterhead hobboing cutter deployment scenarios; The hobboing cutter assembly is dug in the scalable multiple-cutting-edge expansion that designs to be installed on the cutterhead according to the correlation computations result;

For reaching brokenly the effect of rock, and reduce the cutterhead vibration, cutterhead cutting rock process is resolved into two steps: step 1, expand scalable multiple-cutting-edge and dig hobboing cutter and release to cut marginal portion, tunnel rock; Step 2 is dug the hobboing cutter withdrawal with scalable multiple-cutting-edge expansion, and advances the operator dish to use positive hobboing cutter and center hobboing cutter to continue the rock of other parts of cutting tunnel, repeats the excavation that above-mentioned two steps are finished the tunnel.

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