CN104483220B - Method for designing multi-point impact horizontal type TBM cutter disc contraction scale test bed - Google Patents

Abstract

The invention discloses a method for designing a multi-point impact horizontal type TBM cutter disc contraction scale test bed, and belongs to the technical field of tunneling of a full face rock tunnel boring machine. According to the method, pressure rollers in a synchronous loading disc bracket component are arranged on the circumference which has the same radius as that of a cutter disc tool, and by adjusting the arrangement positions and the number of the pressure rollers in the synchronous loading disc bracket component, the adjustment on the load frequency of a contraction scale cutter disc is achieved, the pressure of the synchronous loading disc in the synchronous loading disc bracket component is adjusted, and the adjustment on the torque load value of the contraction scale cutter disc is achieved. The test bed consists of a test bed bottom rack, a cutter disc driving rack, a motor, a coupling, a speed reducer, a main bearing, a cutter disc rack, a contraction scale cutter disc component, a synchronous loading disc component, a synchronous loading disc bracket component and a power loading component. The method is flexible and accurate. By adopting the test bed, the practical working process of a cutter disc can be really simulated, and study on the dynamic characteristics of the cutter disc is achieved.

Description

A kind of multiple spot impacts horizontal tbm cutterhead reduced scale Test-bed Design method

Technical field

The invention belongs to full face rock tunnel boring machine driving technology field, impact horizontal tbm knife particularly to a kind of multiple spot The method for designing of disk reduced scale testing stand.

Background technology

Full face rock tunnel boring machine is the large-scale key technology and equipment that the Tunnel Engineering such as subway, diversion are built, and in driving During, cutterhead is one of topmost part of full face rock tunnel boring machine, and it is born digging excavation, supports the work(of face Can, it is the installation carrier of all broken rock cutters.Load suffered by cutterhead is typical random load, bears high pulling torque, high thrust With the shock loading of random mutation, under random loading, the random torsion that the vibration of cutterhead shows as being forced to elastomer is shaken Move and oscillation crosswise.So the working condition of cutterhead is extremely severe, stressing conditions are sufficiently complex, and the appropriate design of cutterhead is to improve Advance rate, cutterhead life-span, cutter life and the big bearing life of cutterhead, reduce excavating cost, mitigate development machine vibrations, and reduction is made an uproar Sound etc. has important function.Therefore, design is built for the testing stand studying full face rock tunnel boring machine cutterhead characteristic to optimization The design of lengthening the life of cutter head structure and cutterhead is most important.

Design in terms of the domestic testing stand in full face rock tunnel boring machine focuses primarily upon setting of hobboing cutter broken rock assay device Meter.The representative hobboing cutter broken rock testing stand having China Railway Tunnel Group Co's flood to open honor et al. invention, Chinese patent Number: cn201110246883.0, patent name is: " tbm broken rock assay device ", in this assay device experimentation, can survey Measure the multiple parameters such as Tool in Cutting power, axial thrust, pile penetration, knife spacing.But this testing stand can not enter Mobile state to cutterhead Characteristic research, and the loading of this testing stand tunnels the load mode of rock case it is difficult to enter to the load that cutterhead is subject to using cutter Row accurately controls, and is not easy to by Control experiment platform load research experiment.

Content of the invention

The invention solves the problems that a difficult problem, be that the full face rock tunnel boring machine testing stand for existing design can not enter to cutterhead The problem of Mobile state attribute testing, a kind of multiple spot of invention impacts the method for designing of horizontal tbm cutterhead reduced scale testing stand.This design side Method is carried out many using synchronous loading disc assembly, synchronous loading disc carriage assembly and power charging assembly to the reduced scale cutterhead of testing stand Point Impulsive load, by the position of puck, arrangement quantity and pressure size in the synchronous loading disc carriage assembly of adjustment, Realize the control of reduced scale cutterhead load frequency and size.The method is flexibly, accurately.Tbm cutterhead reduced scale using the method design Testing stand, can carry out Research on Dynamic Characteristic to cutterhead, can really simulate the driving operating mode of actual development machine, improve experiment Accuracy.

The technical solution used in the present invention is that a kind of multiple spot impacts horizontal tbm cutterhead reduced scale Test-bed Design method, and it is special Levy and be, in method for designing: the puck in synchronous loading disc carriage assembly is arranged in and knife disc tool radius identical On circumference, by position and the quantity of the puck in the synchronous loading disc carriage assembly of adjustment, realize reduced scale cutterhead and carry The adjustment of lotus frequency；By adjust puck arrangement quantity and in synchronous loading disc assembly synchronization loading disc pressure big Little, realize the adjustment of reduced scale cutter head torque load value, specifically comprise the following steps that

1) pass through the position of puck f in the synchronous loading disc carriage assembly of adjustment, reduced scale cutterhead a is subject to To load frequency be adjusted；Puck f layout feature is as follows with reduced scale cutterhead a load frequency adjustment relation:

Puck f is sequentially arranged along inner circumferential periphery, is disposed with arrangement pressure on each circumference of puck The quantity of roller is identical, if the circumference number being disposed with puck f is k.Make reduced scale cutterhead a in rotation one week, cutterhead knife Tool d is outwards impacted successively by reduced scale cutterhead a center.Knife disc tool d number is n, and it is n that knife disc tool is numbered_i, i is knife It is 1,2,3 ... n.n that dise knife tool place circumference is numbered_iPuck f on the circumference i of place numbers and isN is same circumference upward pressure roller quantity；If two knife disc tool d are located in adjacent circumferential Radius be r_i、r_i+1, r_i+1On radiusPuck f and n_i+1The center angle of knife disc tool d isAngle side To contrary with reduced scale cutterhead a rotation direction.r_iOn radiusPuck f and n_iThe center angle of knife disc tool d isThen because puck f aligns, knife impacts movable sleeve b and side knife impacts the effect of movable sleeve d, reduced scale cutterhead a The shock loading frequency being subject to is:

$f=\frac{1}{t}=\frac{\mathrm{\α}}{{\mathrm{\β}}_{i+1}^j-{\mathrm{\β}}_i^j}---\left(1\right)$

Wherein, α is reduced scale cutterhead a rotational angular velocity；T is the time interval that reduced scale cutterhead a is subject between two Secondary Shocks. For meeting knife disc tool d, percussion is subject to successively by inner circumferential periphery, then should meet condition:

Then in radius r_iCircumferentially, the angle between j-th puck f and the 1st puck is for institute:

$k=\underset{j=2}{\overset{n}{\mathrm{\σ}}}({\mathrm{\β}}_{i+1}^j-{\mathrm{\β}}_i^j)---\left(3\right)$

Then in radius r_iCircumferentially, puck f number n should meet condition for institute:

The condition that should be met according to formula (2), (3), (4), by adjusting adjacent circumferential upward pressure roller f and cutterhead knife The difference of tool d central angleSize and same circumference upward pressure roller f quantity n and arrangement puck circle All quantity k, you can the shock loading frequency that adjustment reduced scale cutterhead a is subject to.

2) pass through to change the pressure of puck f in synchronous loading disc carriage assembly, can adjust synchronization loading disc a The torsion load size being subject to adjusts the torsion load size that reduced scale cutterhead a is subject to.Every knife disc tool d institute is circumferentially Puck f quantity n of arrangement and single puck carry to reduced scale cutterhead a torque to the pressure f of synchronous loading disc a Lotus adjustment relation is as follows:

When single puck f relative synchronization loading disc a rolls, the rolling friction that synchronous loading disc a produces is hindered Power is:

$f_v=\frac{f\·\mathrm{\μk}}{r}---\left(5\right)$

Wherein, f_vThe rolling frictional resistance synchronous loading disc a being produced for single puck f；F is single pressure Roller f is to synchronous loading disc a pressure；R is puck radius；μ k is coefficient of rolling friction.

The torque load that then all puck f produce to synchronous loading disc a is:

$t=\underset{i=1}{\overset{n}{\mathrm{\σ}}}n{f}_v{r}_i---\left(6\right)$

Wherein, t is the torque load that all puck f produce to synchronous loading disc a；F is single puck The rolling frictional resistance that f produces to synchronous loading disc a；r_iFor i-th knife disc tool d place radius size；N is knife disc tool The number of d；N is the puck f quantity that every knife disc tool is circumferentially arranged.(5) formula is brought into (6) formula, obtains:

$t=\underset{i=1}{\overset{n}{\mathrm{\σ}}}\frac{\mathrm{nf}{r}_i\·\mathrm{\μk}}{r}---\left(7\right)$

Knowable to above formula, by change quantity n of the puck f that every knife disc tool d circumferentially arranges with Single puck can be adjusted to reduced scale cutterhead a torsion load to the pressure f of synchronous loading disc a.

A kind of multiple spot impacts horizontal tbm cutterhead reduced scale Test-bed Design method it is characterised in that what this method for designing adopted Testing stand is horizontal type structure, and it is by testing stand underframe 1, cutter plate driver frame 2, motor 3, shaft coupling 4, reductor 5, base bearing 6, knife Plate rail 7, reduced scale cutter head assembly, synchronous loading disc assembly, synchronous loading disc carriage assembly and power charging assembly group Become；Cutter plate driver frame 2 screw is arranged on testing stand underframe 1, and motor 3 and reductor 5 bolt are arranged on cutter plate driver frame 2 On, be connected with shaft coupling 4 between the output shaft of every motor 3 and the input shaft of every reductor 5, the delivery outlet of reductor 5 with The pinion shaft of base bearing 6 is connected；Base bearing 6 is arranged on cutter plate driver frame 2 by bolt, base bearing inner ring and cutterhead frame 7 are connected with；

Reduced scale cutter head assembly is made up of reduced scale cutterhead a, side tool rest b, positive tool rest c and knife disc tool d, reduced scale cutterhead A is welded with cutterhead frame 7, and positive tool rest c and side tool rest b is arranged on reduced scale cutterhead a card, and knife disc tool d is rounded contact shape Formula, knife disc tool d screw is arranged on positive tool rest c or side tool rest b；

Synchronous loading disc assembly by synchronous loading disc a, positive knife impact movable sleeve b, side knife impact movable sleeve d and Cutter attack fixed cover c composition, synchronous loading disc a and the concentric installation of reduced scale cutterhead a, cutter attack fixed cover c uses Screw is arranged on synchronous loading disc a, and the knife disc tool d cooperation that positive knife impacts on movable sleeve b and positive tool rest c is installed, While knife impact movable sleeve d with while tool rest b on knife disc tool d cooperation install, positive knife impact movable sleeve b and the impact of side knife Movable sleeve d and the concentric cooperation of cutter attack fixed cover c；Described synchronous loading disc a is collar plate shape, disk outline For circular arc, card is machined with and knife disc tool d quantity and method for arranging identical square opening e；Positive knife impact movable sleeve One end that b and side knife impact movable sleeve d is the contacts mates of cylindrical drum and knife disc tool d, the other end be square plate with The square opening e cooperation of synchronous loading disc a is installed, and square plate face is in same putting down with synchronous loading disc a card Face；

Synchronous loading disc carriage assembly by two bracket base a, two slide post b, two sliding pair c, two Individual sliding frame d, four spring circle arc support block e, some puck f and puck mounting disc g composition, four Individual spring circle arc support block e screw is arranged on the two ends of two sliding frame d, the support of spring circle arc support block e Face is a part of sphere, and spherical radius is identical with synchronous loading disc a external diameter；Puck f is in puck mounting disc g Radially fixed, adjustable position vertically；With screw, slide post b, slide post and bracket base a are installed on sliding frame Sliding pair c cooperation, bracket base a screw is arranged on testing stand underframe 1, puck mounting disc g bolt It is arranged on two sliding frame d, puck f is arranged on puck mounting disc g, four spring circle arc supports Block e circumferentially supports synchronous loading disc a, puck f to contact with synchronous loading disc a card；

Power charging assembly is by hydraulic actuator fore-stock a, loading roller b, loading roller support base c, cunning Bar d, sliding bar secondary e, slide bar base f, hydraulic actuator g and counter force wall h composition；Counter force wall h welding and On testing stand underframe 1, hydraulic actuator g one end screw is arranged on counter force wall h bolt, the other end and slide bar base F mode connects for screw, slide bar d one end screw is arranged on slide bar base f, and the slide bar d other end props up with loading roller Support seat c welding, loads roller b and is arranged on loading roller support base c, loads roller b and synchronous loading disc a disk Face contacts, and hydraulic actuator fore-stock a is provided with sliding bar secondary e, slide bar d and sliding bar secondary e cooperation peace Dress.

The invention has the beneficial effects as follows this Test-bed Design method has abandoned the load mode that traditional experiment platform tunnels rock, Multiple spot is carried out to the reduced scale cutterhead of testing stand using synchronous loading disc assembly, synchronous loading disc carriage assembly and power charging assembly Impulsive load, by the position of puck, arrangement quantity and pressure size in the synchronous loading disc carriage assembly of adjustment, real Existing reduced scale cutterhead load frequency and the control of size, so as to carry out quantitative study to the dynamic characteristic of cutterhead.The test of design Platform can simulate the leap phenomenon that in actual driving, cutter runs into, so that test load more meets truth.The method sets The testing stand of meter can be tested to the dynamic response of cutterhead, dynamic stress, and the acceleration that can carry out containing crackle cutterhead is tired Labor is tested.

Brief description

Fig. 1 is the perspective view of the present invention；Fig. 2 is reduced scale cutter head assembly schematic diagram；Fig. 3 is synchronous loading disc group Part schematic diagram；Fig. 4 is synchronous loading disc carriage assembly schematic diagram；Fig. 5 is power charging assembly schematic diagram.

In figure: 1- testing stand underframe, 2- cutter plate driver frame, 3- motor, 4- shaft coupling, 5- reductor, 6- base bearing, 7- knife Plate rail ,-reduced scale cutter head assembly, a- reduced scale cutterhead, b- side tool rest, the positive tool rest of c-, d- knife disc tool ,-synchronous loading disc Assembly, a- synchronization loading disc, the positive knife of b- impacts movable sleeve, c- cutter attack fixed cover, and d- side knife impacts movable sleeve, E- square opening ,-synchronous loading disc carriage assembly, a- bracket base, b- slide post, c- sliding pair, d- slides Framework, e- spring circle arc support block, f- puck, g- puck mounting disc ,-power charging assembly, a- Hydraulic actuator fore-stock, b- loads roller, and c- loads roller support base, d- slide bar, e- sliding bar pair, f- Slide bar base, g- hydraulic actuator, h- counter force wall.

Specific embodiment

With technical scheme, the enforcement of the present invention is further described below in conjunction with the accompanying drawings.Axial direction according to actual cutterhead The feature changeable with torque load impact, the multiple spot of design impacts horizontal tbm cutterhead reduced scale testing stand and adopts 4 frequency conversion motors 3 pass through deceleration system provides rotation driving to reduced scale cutterhead a, and is provided to reduced scale cutterhead a using three hydraulic actuator g Axial impact loading.Because reduced scale cutterhead a will bear larger axial load, it requires that cutter plate driver frame 2 will have larger Rigidity.In the present invention, frequency conversion motor 3, reductor 5 and base bearing 6 are arranged on cutter plate driver frame 2, and cutter plate driver frame 2 passes through spiral shell Nail is arranged on testing stand underframe 1.In order that reduced scale cutterhead a is subject to multiple spot shock loading, reduced scale cutterhead a is just disposed with On tool rest c and side tool rest ib, positive tool rest c and side tool rest ib, knife disc tool d is provided with by screw, realizes to reduced scale cutterhead The front of a and marginal position carry out Impulsive load.In actual tbm tunneling process, cutterhead can be rushed by different frequency and size Hit load, this testing stand of design is using synchronous loading disc assembly, synchronous loading disc carriage assembly, power charging assembly With knife disc tool d, multiple spot Impulsive load is carried out to the reduced scale cutterhead a of testing stand, by the synchronous loading disc carriage assembly of adjustment The position of middle puck f, arrangement quantity and pressure size, realize the control of reduced scale cutterhead a load frequency and size System.

, actual tbm cutter diameter is 8530mm to the present invention, designs reduced scale taking the geological conditions of certain seepage tunnel engineering as a example The a diameter of 1490mm of cutterhead a.Knife disc tool d is arranged using bifilar helix method, determines that knife spacing is 50mm, arrangement 11 is just Tool rest c and 5 side tool rest b.In power charging assembly, three hydraulic actuator g can be with different pressure and frequency band Moving slide-bar d and loading roller b carries out Impulsive load to synchronous loading disc a card, with knife in synchronous loading disc assembly The positive knife impact movable sleeve b of tool impact fixed cover c cooperation and side knife impact movable sleeve d and knife disc tool d coordinates, will The shock loading that synchronous loading disc a is subject to passes to knife disc tool d, and then passes to reduced scale cutterhead a.Synchronous loading disc props up Puck f is provided with puck mounting disc g in frame assembly, puck f is adjustable in cutter axis direction Whole position, to adjust the pressure size to synchronous loading disc a card for the puck f, applies to specify to synchronous loading disc a The torsion load of size.When synchronous loading disc a is with reduced scale cutterhead a synchronous axial system, it is arranged in identical with knife disc tool d half Puck f on the circumference of footpath and positive knife impact movable sleeve b and side knife impacts the square plate effect of movable sleeve d, right Knife disc tool d produces the shock loading of certain frequency.Test-bed Design method specifically comprises the following steps that

1) according to formula (2), (3), (4) condition, by adjusting adjacent circumferential upward pressure roller f and knife disc tool d The difference of central angleSize and same circumference upward pressure roller f quantity and arrangement puck circumference number Amount k, the shock loading frequency that adjustable reduced scale cutterhead a is subject to.This testing stand reduced scale cutterhead a upper tool pan cutter d quantity is n =16, reduced scale cutterhead a rotational angular velocity is α=33.6 °/s.Make k=10, n=1, then according to formula (2), knowShould MeetKnown according to formula (3) and (4)Thus a pressure is arranged on same circumference Roller f, and the difference of adjacent circumferential upward pressure roller f and knife disc tool d central angleFor 36 °.Then by formula (1) Understand, make due to the effect of puck f shock loading frequency f that reduced scale cutterhead a is subject to be in such cases: f= If 0.93. making k=16, n=2, known by formula (2)Should meetKnown according to formula (3) and (4)Thus arranging 2 puck f on same circumference, the central angle of 2 pucks is 180 °, And adjacent circumferential upward pressure roller f and the difference of knife disc tool d central angleFor 11.25 °.Then can by formula (1) Know, make due to the effect of puck f shock loading frequency f that reduced scale cutterhead a is subject to be in such cases: f= 2.99. in summary, by adjusting the difference of adjacent circumferential upward pressure roller f and knife disc tool d central angle's The quantity of size and same circumference upward pressure roller and circumference quantity k of arrangement puck, have reached adjustment reduced scale cutterhead a The purpose of the shock loading frequency being subject to.

2) pass through to change quantity n of puck f and the single pressure that every knife disc tool d circumferentially arranges Roller can be adjusted to reduced scale cutterhead a torsion load to the pressure f of synchronous loading disc a.

Puck f radius is r=25mm, coefficient of rolling friction μ k=0.5mm, the radius of puck place circumference r_i, when i is from 1 to n, r_iBe followed successively by 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 727mm, 746mm, 790mm, 819mm and 827mm.Take n=1, adjust f=5kn, can be obtained by formula (7), by In the pressure effect of puck f, the friction torque load that synchronous loading disc a is subject to increases t=0.721knm, i.e. reduced scale Cutterhead a torque load increases t=0.721knm；Take n=5, f=6kn, can be obtained by formula (7), due to applying of puck f Pressure acts on, and the friction torque load that synchronous loading disc a is subject to increases t=4.33knm, and that is, reduced scale cutterhead a torque load increases T=4.33knm.

During experiment, open frequency conversion motor 3, frequency conversion motor 3 holds 6 through shaft coupling 4, reductor 5 and cutter spindle and passes power Pass reduced scale cutterhead a, so that reduced scale cutterhead a is rotated with the speed of 0-50rpm, frequency conversion motor 3 can be to the rotation of reduced scale cutterhead a Speed and driving torque are adjusted.Knife disc tool d on reduced scale cutterhead a is by impacting movable sleeve b and side knife with positive knife Impact movable sleeve d cooperation drives synchronous loading disc a with reduced scale cutterhead a synchronous axial system, on synchronous loading disc carriage assembly Spring circle arc support block e supporting surface be a part of sphere, it with synchronization loading disc a external diameter identical, synchronous loading disc A can rotate with reduced scale cutterhead a under four spring circle arc support block e support, and energy small angle deflection, sliding frame The slide post b and bracket base a cooperation by both sides for the d, synchronous loading disc a can pass through spring circular arc under impact force Support block e drives sliding frame d in reduced scale cutterhead a axis direction parallel sliding；Pressure on puck mounting disc g Power roller f presses to synchronous loading disc a with certain pressure, when synchronous loading disc is with reduced scale cutterhead a synchronous axial system, pressure Positive knife impact movable sleeve b on roller f and synchronous loading disc a and the impact movable sleeve d effect of side knife, to knife disc tool D produces impact, by adjusting the position of puck f, arranging quantity, arrange circumference number and to synchronous loading disc a Pressure, the shock loading frequency of reduced scale cutterhead a and torque load size can be adjusted；Shock loading is by hydraulic actuation Device g band moving slide-bar d and loading roller b acts on to synchronous loading disc a and producing, and synchronous loading disc a impacts through positive knife Movable sleeve b, side knife impact movable sleeve d and knife disc tool d transfer load to reduced scale cutterhead a.

The multiple spot of the present invention impacts horizontal tbm cutterhead reduced scale testing stand, can control the load frequency that reduced scale cutterhead is subject to And size, dynamic characteristic test can be carried out to multiple Split type structure cutterheads and different cutters layout scheme cutterhead, have very high warp Ji and practical value are great for the Research Significance optimizing cutter head structure with extend the cutterhead life-span.

Claims (2)

1. a kind of multiple spot impacts horizontal tbm cutterhead reduced scale Test-bed Design method it is characterised in that in method for designing, inciting somebody to action synchronous Puck in loading disc carriage assembly be arranged in knife disc tool radius identical circumference on, by the synchronous loading disc of adjustment The position of the puck in carriage assembly and quantity, realize the adjustment of reduced scale cutterhead load frequency；By adjusting pressure The arrangement quantity of roller and the pressure size to loading disc synchronous in synchronous loading disc assembly, realize reduced scale cutter head torque load value Adjustment；Specifically comprise the following steps that

1) pass through the position of puck (f) in synchronous loading disc carriage assembly () of adjustment, to reduced scale cutterhead (a) The load frequency being subject to is adjusted；Puck (f) layout feature is with reduced scale cutterhead (a) load frequency adjustment relation such as Under:

Puck (f) is sequentially arranged along inner circumferential periphery, is disposed with arrangement pressure rolling on each circumference of puck The quantity of son is identical, if the circumference number being disposed with puck (f) is k；Make reduced scale cutterhead (a) in rotation one week, cutterhead Cutter (d) is outwards impacted successively by reduced scale cutterhead (a) center；Knife disc tool (d) number is n, and knife disc tool is numbered and is n_i, it is 1,2,3 ... n that i numbers for knife disc tool place circumference；n_iPuck (f) on the circumference i of place is numbered and isN is same circumference upward pressure roller quantity；If two knife disc tool (d) institutes in adjacent circumferential Radius be r_i、r_i+1, r_i+1On radiusPuck (f) and n_i+1The center angle of knife disc tool (d) is Angle direction is contrary with reduced scale cutterhead (a) rotation direction；r_iOn radiusPuck (f) and n_iKnife disc tool (d) Center angle isThen because puck (f) aligns, knife impacts movable sleeve (b) and side knife impacts movable sleeve (d) Effect, the shock loading frequency that reduced scale cutterhead (a) is subject to is:

$f=\frac{1}{t}=\frac{\mathrm{\α}}{{\mathrm{\β}}_{i+1}^j-{\mathrm{\β}}_i^j}---\left(1\right)$

Wherein, α is reduced scale cutterhead (a) rotational angular velocity；T is the time interval that reduced scale cutterhead (a) is subject between two Secondary Shocks； For meeting knife disc tool (d), percussion is subject to successively by inner circumferential periphery, then should meet condition:

Then in radius r_iCircumferentially, the angle between j-th puck (f) and the 1st puck is for institute:

$k\underset{j=2}{\overset{n}{\σ}}({\mathrm{\β}}_{i+1}^j-{\mathrm{\β}}_i^j)---\left(3\right)$

Then in radius r_iCircumferentially, puck (f) number n should meet condition for institute:

The condition that should be met according to formula (2), (3), (4), by adjusting adjacent circumferential upward pressure roller (f) and knife disc tool The difference of (d) central angleSize and quantity n of same circumference upward pressure roller (f) and arrangement puck Circumference quantity k, you can the shock loading frequency that adjustment reduced scale cutterhead (a) is subject to；

2) pass through to change the pressure of puck (f) in synchronous loading disc carriage assembly (), the synchronous loading disc (a) of adjustment The torsion load size being subject to adjusts the torsion load size that reduced scale cutterhead (a) is subject to；Circle that every knife disc tool (d) is located On week puck (f) quantity n of arrangement and single puck to the pressure f of synchronous loading disc (a) to reduced scale cutterhead A () torsion load adjustment relation is as follows:

When single puck (f) relative synchronization loading disc (a) rolls, the rolling friction that synchronous loading disc (a) is produced Resistance is:

$f_v=\frac{f\·\mathrm{\μ}k}{r}---\left(5\right)$

Wherein, f_vThe rolling frictional resistance synchronous loading disc (a) being produced for single puck (f)；F is single pressure rolling Sub (f) is to synchronous loading disc (a) pressure；R is puck radius；μ k is coefficient of rolling friction；

The torque load that then all pucks (f) produce to synchronous loading disc (a) is:

$t=\underset{i=1}{\overset{n}{\σ}}{\mathrm{nf}}_v{r}_i---\left(6\right)$

Wherein, the torque load that t produces to synchronous loading disc (a) for all pucks (f)；f_vFor single puck F rolling frictional resistance that () produces to synchronous loading disc (a)；r_iFor i-th knife disc tool (d) place radius size；N is The number of knife disc tool (d)；N is puck (f) quantity that every knife disc tool is circumferentially arranged；By (5) formula band Enter (6) formula, obtain:

$t=\underset{i=1}{\overset{n}{\σ}}\frac{{\mathrm{nfr}}_i\·\mathrm{\μ}k}{r}---\left(7\right)$

Knowable to above formula, by change quantity n of the puck (f) that every knife disc tool (d) is circumferentially arranged with Single puck can be adjusted to reduced scale cutterhead (a) torsion load to the pressure f of synchronous loading disc (a).

2. as claimed in claim 1 a kind of multiple spot impact horizontal tbm cutterhead reduced scale Test-bed Design method it is characterised in that The testing stand that this method for designing adopts is horizontal type structure, and it is by testing stand underframe (1), cutter plate driver frame (2), motor (3), shaft coupling Device (4), reductor (5), base bearing (6), cutterhead frame (7), reduced scale cutter head assembly (), synchronous loading disc assembly (), synchronization add Load plate carriage assembly () and power charging assembly () composition；Cutter plate driver frame (2) screw is arranged on testing stand underframe (1) On, motor (3) and reductor (5) bolt are arranged on cutter plate driver frame (2), and the output shaft of every motor (3) is subtracted with every Shaft coupling (4) is used to connect between the input shaft of fast machine (5), the delivery outlet of reductor (5) is coordinated with the pinion shaft of base bearing (6) Connect；Base bearing (6) is arranged on cutter plate driver frame (2) by bolt, and base bearing inner ring is connected with cutterhead frame (7)；

Reduced scale cutter head assembly () is made up of reduced scale cutterhead (a), side tool rest (b), positive tool rest (c) and knife disc tool (d), contracting Chi cutterhead (a) is welded with cutterhead frame (7), and positive tool rest (c) and side tool rest (b) are arranged in reduced scale cutterhead (a) card, cutterhead Cutter (d) is rounded contact form, and knife disc tool (d) screw is arranged on side tool rest (b) or positive tool rest (c)；

Synchronous loading disc assembly () by synchronous loading disc (a), positive knife impact movable sleeve (b), side knife impact movable sleeve ( D) with cutter attack fixed cover (c) composition, synchronous loading disc (a) and the concentric installation of reduced scale cutterhead (a), cutter attack Fixed cover (c) screw is arranged on synchronous loading disc (a), on positive knife impact movable sleeve (b) and positive tool rest (c) Knife disc tool (d) cooperation is installed, while knife impact movable sleeve (d) with while tool rest (b) on knife disc tool (d) cooperation install, Positive knife impact movable sleeve (b) and side knife impact movable sleeve (d) and the concentric cooperation of cutter attack fixed cover (c)；Described Synchronous loading disc (a) be collar plate shape, disk outline be circular arc, card is machined with knife disc tool (d) quantity and Method for arranging identical square opening (e)；It is circle that positive knife impacts movable sleeve (b) and one end of side knife impact movable sleeve (d) The contacts mates of column casing and knife disc tool (d) are installed, the other end be square plate with the square opening of synchronous loading disc (a) ( E) cooperation is installed, and square plate face is in same plane with synchronous loading disc (a) card；

Synchronous loading disc carriage assembly () by two bracket bases (a), two slide posts (b), two sliding pairs ( C), two sliding frames (d), four springs circle arc support block (e), some pucks (f) are installed with puck Disk (g) forms, and four spring circle arc support block (e) screws are arranged on the two ends of two sliding frames (d), and spring is justified The supporting surface of arc support block (e) is a part of sphere, and spherical radius is identical with synchronous loading disc (a) external diameter；Puck F () is radially fixed in puck mounting disc (g), vertically adjustable position；With screw, cunning is installed on sliding frame Dynamic post (b), slide post is coordinated with the sliding pair (c) of bracket base (a), and bracket base (a) is arranged on examination with screw Test on platform underframe (1), puck mounting disc (g) bolt is arranged on two sliding frames (d), puck ( F) be arranged on puck mounting disc (g), four springs circle arc support block (e) circumferentially support synchronous loading disc ( A), puck (f) is contacted with synchronous loading disc (a) card；

Power charging assembly () by hydraulic actuator fore-stock (a), load roller (b), load roller support base ( C), slide bar (d), sliding bar pair (e), slide bar base (f), hydraulic actuator (g) and counter force wall (h) form； , on testing stand underframe (1), hydraulic actuator (g) one end screw is arranged on counter force wall for counter force wall (h) welding and bolt On (h), the other end and slide bar base (f) mode connects for screw, slide bar (d) one end screw be arranged on slide bar base ( F) on, slide bar (d) other end welds with loading roller support base (c), and loading roller (b) is arranged on loading roller and supports On seat (c), load roller (b) and contact with synchronous loading disc (a) card, hydraulic actuator fore-stock (a) is upper to be installed There are sliding bar pair (e), slide bar (d) and sliding bar pair (e) cooperation.