CN110057705A - Cutter ring abrasion test device and test method under a kind of water jet and corrosive liquid - Google Patents
Cutter ring abrasion test device and test method under a kind of water jet and corrosive liquid Download PDFInfo
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- 238000005299 abrasion Methods 0.000 title claims abstract description 58
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 239000011435 rock Substances 0.000 claims abstract description 93
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- 238000000034 method Methods 0.000 claims abstract description 44
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
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- 238000009826 distribution Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses cutter ring abrasion test device and test methods under a kind of water jet and corrosive liquid.In the experimental rig, telescopic oil cylinder is connected in three-dimensional rack, crossbeam is sequentially connected with below telescopic oil cylinder, gusset piece, three-dimensional force transducer and knife rest, bearing is connected in knife rest, cutter shaft, reduced scale cun cutter ring, vertical spray head guide rail is connected with below knife rest, lateral spray head guide rail is sequentially connected on vertical spray head guide rail, head cartridge and spray head, crossbeam is symmetrically furnished with two sets of knife rests about telescopic oil cylinder, reduced scale cun cutter ring, the components such as spray head, extremely hard rock sample is placed in feed bin box, feed bin cassette bottom portion is coupled by bolt with hydraulic motor, infrared radiation thermometer is fixedly linked on support base outer ring.The test method can cooperate the experimental rig to complete cutting wear test overall process of cutter ring under the conditions of water jet auxiliary and corrosive liquids, can predict for the hobboing cutter cutter ring wear-out life under the conditions of water jet and corrosive liquid and its wearability design provides foundation.
Description
Technical field
The present invention relates to rock tunnel development machine hobboing cutters to cut wear test technical field, and in particular to a kind of water jet is auxiliary
It helps and the hobboing cutter cutter ring revolution cutting abrasion test device and test method under the conditions of corrosive liquids.
Background technique
Rock tunnel development machine (abbreviation TBM) is answered extensively due to many advantages, such as construction efficiency is high, operational security is strong
For tunnel excavation.TBM is essentially relying on the hobboing cutter cutting and crushing rock on cutterhead, and the broken rock performance of hobboing cutter directly determines TBM
The reliability and stability of complete machine driving.Hobboing cutter mainly includes the critical components such as cutter ring, knife hub, cutter shaft, hobboing cutter by cutter ring with
Rock contacts with each other, and due to the strong abrasion of rock, can bring and be seriously worn in cutting process to hobboing cutter cutter ring, and then serious
Hobboing cutter service life and efficiency of breaking rock are restricted, therefore pole is special it is necessary to grasp the hobboing cutter cutter ring fretting wear in hobboing cutter cutting process
Property.China has a vast territory, complex geologic conditions, when hobboing cutter cutting broken rock stratum is related to extremely hard formation (compressive strength of rock
150MPa or more) or when corrosive formation (in the corrosive liquid environments such as seawater, strong acid, highly basic) or even part is extremely hardly
When layer is in corrosive liquid environment, hobboing cutter cutter ring efficiency of breaking rock is low and hobboing cutter cutter ring abrasion loss sharply increases, and gives the hobboing cutter longevity
Life prediction and its wearability design bring great challenges.It was worn away to solve hobboing cutter cutter ring under extremely hard rock and corrosive environment
Big to wait engineering problems, some novel auxiliary hobboing cutter rock breaking methods are gradually suggested.More typically auxiliary hobboing cutter rock breaking method is
Water jet assist hobboing cutter rock breaking method, China Railway Construction Heavy Industry Co., Ltd. application patent of invention (application number:
201710377326.X, 201811311806.7), title is respectively as follows: a kind of Hob for cutting rock, cutter head of shield machine and shield machine, and one
Kind development machine and development machine cutting mechanism propose to assist in hob holder position or cutter head center region installation water jet device
Hobboing cutter rock breaking method.The patent of invention (application number: CN201310188881.X) of Dalian University of Technology's application, title are as follows: high pressure
Method for arranging and structure of the water jet in development machine cutterhead propose one kind and arrange water jet auxiliary hobboing cutter on TBM cutterhead
Rock breaking method and structure.
Water jet assists hobboing cutter rock breaking method that can provide hydraulic pressure fracturing rock when hobboing cutter cutter ring cuts rock,
Hobboing cutter cutter ring interface can be washed away simultaneously, and then is removed hobboing cutter cutter ring interfacial corrosion abrasive material and reduced hobboing cutter cutter ring interfacial contact temperature
Degree, to reduce hobboing cutter cutter ring cutting rock break load and the abrasion of hobboing cutter cutter ring.Due to changing original hobboing cutter after increasing water jet
Cutting environment and cutting characteristic, corrosive liquids has corrosion effect to hobboing cutter cutter ring in addition, leads to hobboing cutter cutter ring fretting wear
Characteristic changes, so that it is different from traditional hobboing cutter cutter ring wearing character, it is therefore necessary to it is auxiliary to study water jet
It helps and corrosive liquids is to the affecting laws of the friction and wear characteristic of hobboing cutter cutter ring.It is that acquisition is above-mentioned by Experimental Method in Laboratory
Water jet auxiliary and corrosive liquids to the most effective means of hobboing cutter cutter ring friction and wear characteristic, therefore design it is a kind of can research
Water jet auxiliary and corrosive liquids to hobboing cutter cutter ring cut extremely hard rock fretting wear rule experimental rig and test side
Method seems particularly important.
By having multiple units at present and devising related TBM hob abrasion examination to pertinent literature and data investigation discovery
Experiment device.The patent of invention (application number: 201310032227.X) of Central South University's application, a kind of title are as follows: hard rock hob broken rock
Characteristic test device, the test device being related to can carry out hob abrasion test, but the device uses and actively rotates hobboing cutter cutter ring
Mode realize hobboing cutter sliding frictional wear, there is certain difference with true hobboing cutter cutter ring passive rotation fretting wear, and
The experimental rig can not carry out the hobboing cutter cutter ring cutting wear test under the conditions of water jet auxiliary and corrosive liquids；Middle iron tunnel
The application of Group Co., Ltd, office patent of invention (application number: 201710905705.1), title are as follows: hob abrasion test experiments are flat
Platform and matched measurement evaluation method, the abrasion test device being related to also realize that hobboing cutter rubs by the way of actively rotating hobboing cutter
Scouring damage, and what is simulated is the abrasion of hobboing cutter linear incision, turning round cutting abrasion with true hobboing cutter has biggish distortion, simultaneously should
Experimental rig can not carry out the hobboing cutter cutting wear test under the conditions of water jet auxiliary and corrosive liquids；Changsha University's application
Patent of invention (application number: 201811158653.7), title are as follows: a kind of shield cutter material wear test platform has developed one kind
Hobboing cutter material abrasion test device, hobboing cutter cutter ring is cut under the conditions of which can not carry out water jet auxiliary and corrosive liquids
Wear test, and when hobboing cutter cutter ring to rub extremely hard rock when, since hobboing cutter cutter ring cutting loading is excessive, easily cause experimental rig side
Turn over unstability.Meanwhile hobboing cutter and its accessory disassembly and installation process complexity under the device, hobboing cutter installation site is also non-adjustable,
The friction and wear characteristic ability for studying hobboing cutter cutter ring is limited.
From the point of view of to sum up, existing hob abrasion experimental rig can complete it is generally conventional under the conditions of hobboing cutter cutter ring fretting wear
Test, but existing hob abrasion experimental rig cannot complete the hobboing cutter knife under the conditions of water jet auxiliary and corrosive liquids substantially
Circle cutting wear test.When cutting extremely hard rock in view of hobboing cutter simultaneously, hobboing cutter cutting loading is bigger under identical cutting wearing depth,
It is be easy to cause rock feed bin or even entire test device unstability, therefore higher to the stability requirement of abrasion test device.In addition,
There are different installation radiuses on cutterhead for hobboing cutter, and turn round passive rotation cutting and crushing around the cutterhead center of circle under the installation radius
Rock, therefore the hobboing cutter cutter ring passive rotation friction and wear characteristic under different installation radiuses need to be studied.The present invention is directed to existing
The deficiency of hobboing cutter frictional wear test device is practical in conjunction with the hobboing cutter fretting wear under the conditions of water jet auxiliary and corrosive liquids
Research Requirements devise the hobboing cutter cutter ring abrasion test device under the conditions of this water jet auxiliary and corrosive liquids and test side
Method, to realize different installation radiuses, depth of cut, around cutter head center rotational speed, normal pressure, water jet and corrosive liquids
Etc. hobboing cutter cutter ring cutting rubbing wear testing under multi-parameters and its monitoring.
Summary of the invention
The purpose of the present invention is to provide the hobboing cutter cutter rings under the conditions of a kind of water jet auxiliary and corrosive liquids to wear examination
Experiment device and test method realize that the hobboing cutter cutter ring under the conditions of water jet auxiliary and corrosive liquids cuts extremely hard rock fretting wear
The hobboing cutter cutter ring friction and wear characteristic under different parameters is studied in test and its dynamic monitoring, is the hob abrasion under different parameters
Life prediction and its wearability design provide support.
The present invention mainly realizes that the invention mainly comprises telescopic oil cylinder, three-dimensional rack, three axis force sensings by following scheme
Device, reduced scale cun cutter ring, infrared radiation thermometer, support base outer ring, extremely hard rock sample, wear-resisting roller, support base chassis, liquid are led
Pipe, hydraulic motor, feed bin box, rack supporting rib, crossbeam, cross beam support muscle, bearing right end cap, cutter shaft, fastening nut, transverse jet
Head guide rail, head cartridge, spray head, water jet conduit, vertical spray head guide rail, bearing left end cap, bearing, knife rest, knife rest supporting rib,
Gusset piece.
The telescopic oil cylinder is fixed on the middle position of the three-dimensional rack, and the three-dimensional bracket right angle turn uses machine
Frame supporting rib is reinforced, and the three-dimensional bracket lower end is anchored on ground；The telescopic oil cylinder passes through its piston rod and the crossbeam
Connection is arranged symmetrically about intermediate position there are two the cross beam support muscle on the crossbeam, and the crossbeam passes through bolt
Couple with the gusset piece, the gusset piece passes through the three-dimensional force transducer and the Connection of the Scraper holder, opens inside the crossbeam
Have an oat tail groove structure, the knife rest can be slided in company with the gusset piece along dovetail groove, to reach different installation radiuses, and finally by
The locked positioning of bolt.
The knife rest two sides are furnished with the knife rest supporting rib, and a pair of bearing of installation, the knife rest are left in the knife rest
Right two sides are connected with the bearing left end cap and bearing right end cap, for positioning the outer ring of the bearing, the bearing right end cap with
Sealing ring is furnished between the cutter shaft；The bearing inner race and the cutter shaft interference fit joint, the cutter shaft pass through key and the contracting
The connection of size cutter ring, is screwed on the cutter shaft by the fastening nut, and the reduced scale cun cutter ring can be together with the cutter shaft and institute
State bearing inner race rotation；Interference fit joint inside the bearing outer ring and knife rest；The three-dimensional force transducer, knife rest, cutter shaft, reduced scale
Very little cutter ring and the fastening nut are symmetrically distributed on the crossbeam about the telescopic oil cylinder, required reduced scale cun cutter ring with it is described
Extremely hard rock sample contacts.
The vertical spray head guide rail is connected with immediately below the knife rest, the transverse direction spray head guide rail can be on vertical spray head guide rail
It moves up and down, and is finally fastened by bolts positioning；The transverse direction spray head guide rail is provided with oat tail groove structure, and the head cartridge can be
It is moved left and right on the transverse direction spray head guide rail, and is finally fastened by bolts positioning；The spray head is connected on the head cartridge,
And the spray head can swing unspecified angle on the head cartridge, and finally be positioned by bolt fastening, on the head cartridge
The spray head of different structure form can be installed.
The extremely hard rock sample and the feed bin box are circle, and the extremely hard rock sample is placed in the feed bin box,
And by four symmetrical bolt fastenings, the height of the feed bin box is higher than the extremely hard rock sample, table in the feed bin box
Face is coated with corrosion-resistant coating, and feed bin cassette bottom portion is coupled by bolt with the hydraulic motor, and the hydraulic motor is fixed on ground
Face；The feed bin box edge bottom and several described wear-resisting roller contacts, several described wear-resisting rollers are evenly arranged in institute
It states in the hemisphere face groove on support base chassis, the wear-resisting roller can freely roll in hemisphere face groove, the support bottom
Seat chassis supports feed bin box edge by the wear-resisting roller.
The infrared radiation thermometer is fixedly linked on the support base outer ring, and reduced scale described in face cun cutter ring centre bit
It sets, the reduced scale cun cutter ring entire surface Characteristics of The Distribution of Temperature during test can be acquired in real time；The support base outer ring
It is provided with a drainage hole with the connection place on support base chassis, drainage hole is connected with the liquid conduits.
The mobile piston rod by the telescopic oil cylinder of vertical direction of the crossbeam, knife rest and reduced scale cun cutter ring is flexible to be moved
Dynamic control is realized, and telescopic oil cylinder has the function of locked displacement and keeps constant pressure, it can guarantees the reduced scale cun knife
Enclose the friction-wear test under constant pressure and constant depth of cut；The circular-rotation of the feed bin box and extremely hard rock sample is by institute
It states hydraulic motor rotation to realize, the hydraulic motor can be adjusted by flow velocity and pressure, realize hydraulic motor rotary speed stepless-adjustment
Section, and then realize the revolving speed step-less adjustment of feed bin box and extremely hard rock sample.
The three-dimensional force transducer is used to test the reduced scale cun cutter ring abrasion under the conditions of water jet auxiliary and corrosive liquids
Three directional loads data, and for calculating corresponding coefficient of friction.
In view of the structure size of true hobboing cutter cutter ring is excessive, it is not easy to carry out indoor wear experimental study, and full-scale
Cutter ring selling at exorbitant prices, therefore true hobboing cutter cutter ring is replaced using the reduced scale cun cutter ring, the mechanics after material and heat treatment
Performance is consistent with true hobboing cutter cutter ring.
The test method that the abrasion test device is related to includes the following steps:
Step 1: reduced scale cun cutter ring fretting wear parameter setting
(1) radius is installed and revolving speed determines.For reduced scale cun cutter ring or true cutter ring, corresponding passive revolving speed and around
Shown in following two formula of the relationship of the revolving speed of the crossbeam center or cutter head center；
n1r1=n2r2 (1)
N1R1=N2R2 (2)
In formula, n1For the passive revolving speed of the reduced scale cun cutter ring, r1For the reduced scale cun cutter ring radius, n2Turn for the crossbeam
Speed, r2For installation radius of the reduced scale cun cutter ring on crossbeam；N1For the passive revolving speed of true hobboing cutter cutter ring, R in engineering1For work
True hobboing cutter cutter ring radius, N in journey2For cutterhead revolving speed true in engineering, R2For installation of the true hobboing cutter on cutterhead in engineering half
Diameter；
For hobboing cutter cutter ring friction condition true in preferable model engineering, following formula need to be met:
n1=N1 (3)
Then obtain following formula:
In order to accelerate wear test process, the crossbeam revolving speed n is set2Greater than cutterhead revolving speed N true in engineering2, and be it
Integral multiple can then greatly reduce the installation radius of the reduced scale cun cutter ring, and then it is whole greatly to reduce cutter ring abrasion test device
Body size.
(2) cutter ring normal pressure and depth of cut determine.In view of TBM hob broken rock true in engineering exist permanent normal pressure and
Two kinds of broken rock modes of constant depth of cut, two kinds of cutting wear working conditions of the reduced scale cun cutter ring pass through the lock of the telescopic oil cylinder
Dead displacement is realized with constant pressure holding function；The constant positive pressure of the reduced scale cun cutter ring is according in true TBM progradation
Thrust determines, according to Hertz contact stress criterion, it is only necessary to guarantee true hobboing cutter in reduced scale cun cutter ring contact stress and engineering
Cutter ring contact stress is equal；
The reduced scale cun constant depth of cut of cutter ring determines that method also uses Hertz contact stress criterion, though contact stress
Change constantly, but according to document (Study of pressure distribution within the crushed zone
In the contact area between rock and disc cutters) it is found that there are basic contact stress, it is as follows
Shown in formula:
In formula, P0For the basic contact stress of cutter ring,For the contact angle of cutter ring and rock, C is dimensionless factor, for normal
Section cutter ring is about 2.12, r hobboing cutter cutter ring radius；T is blade degree；H is cutter ring depth of cut；S is knife spacing, σcFor rock list
Axis compression strength, σtFor Tensile Strength of Rock；
It need to guarantee that the reduced scale cun basic contact stress of cutter ring is equal with the basic contact stress of hobboing cutter cutter ring true in engineering
, then it needs to meet following formula:
In formula, saFor the reduced scale cun cutter ring knife spacing,For the contact angle of the reduced scale cun cutter ring and rock, raFor institute
State reduced scale cun cutter ring radius, TaIt is wide for the reduced scale cun cutter ring blade；sbFor hobboing cutter cutter ring knife spacing true in engineering,For work
The contact angle of true hobboing cutter cutter ring and rock, r in journeybFor hobboing cutter cutter ring radius true in engineering, TbFor hobboing cutter knife true in engineering
It is wide to enclose blade；
Depth of cut needed for reduced scale described in convolution (6) and formula (7) available test cun cutter ring.
(3) wearing- in period determines.Test should be ground with the reduced scale cun cutter ring abrasion distance with hobboing cutter cutter ring true in engineering
Damage is equidistant, therefore need to meet following formula:
2πr2n2t2=2 π R2N2T2 (7)
The then actual wear test period of the reduced scale cun cutter ring are as follows:
In formula, t2The time required to the reduced scale cun cutter ring abrasion, T2For hobboing cutter cutter ring wearing- in period true in engineering.
Step 2: reduced scale cun cutter ring installation and removal
Key: being mounted on the cutter shaft by the installation process of the reduced scale cun cutter ring first, then by the reduced scale cun knife
Circle is set on key along axial direction, and withstands the stepped locations of the cutter shaft, and then the fastening nut is tightened on the cutter shaft,
By the reduced scale cun cutter ring fastening；
The disassembly process of the reduced scale cun cutter ring: unscrewing the fastening nut first, and removed, then gently with hammer
Son taps the reduced scale cun cutter ring along the cutter shaft free end, and takes out the reduced scale cun cutter ring；
The installation and removal process of above-mentioned reduced scale cun cutter ring is simple, without dismounting the bearing, greatlies simplify cutter ring mill
Damage test process.
Step 3: test process operating method
(1) the extremely hard rock sample is placed in the feed bin box, and be fastened by bolts locked；When corrosivity need to be studied
When liquid influences hobboing cutter cutter ring wearing character, the corrosive liquid of the rock surface injection certain depth in the feed bin box is needed
Body, when only research water jet influences the wearing character of hobboing cutter cutter ring, without the rock surface injection in the feed bin box
Corrosive liquids；
(2) it weighs to the reduced scale cun cutter ring before abrasion, and according to the installation radius and step set in step 1
The reduced scale cun cutter ring is mounted on the corresponding position of the crossbeam, and locked by the reduced scale cun cutter ring installation method in rapid two
Fastening is set；
(3) telescopic oil cylinder is controlled, drives the crossbeam mobile to the extremely hard rock sample direction, until the reduced scale
Depth of cut or normal pressure needed for very little cutter ring reaches test, required depth of cut or normal pressure are determining according to step 1, and
Eventually by the locking function of the telescopic oil cylinder, guarantee constant depth of cut or constant pressure；
(4) when Research on Wear Characteristics of the water jet to hobboing cutter cutter ring need to be studied, by adjust the lateral spray head guide rail,
Head cartridge, vertical spray head guide rail, determine the relative position of the spray head and the reduced scale cun cutter ring, and regulate required water-jet
The design parameters such as pressure, the flow velocity of stream；
(5) start the three-dimensional force transducer and the infrared radiation thermometer, prepare reduced scale described in real-time testing cun cutter ring
Abrasion load and temperature field feature；
(6) according to the hydraulic motor rotary speed and wearing- in period of step 1 setting, start the hydraulic motor, make described
Hydraulic motor keeps constant rotational speed.When need to study water jet influences the wearing character of hobboing cutter cutter ring, start the liquid
While pressure motor, water jet pumping plant need to be started simultaneously according to the water jet parameter of setting.When only research corrosive liquids to rolling
When the wearing character of knife cutter ring influences, without starting water jet pumping plant.It is final to realize water jet auxiliary and corrosive liquid concrete conditions in the establishment of a specific crime
Hobboing cutter cutter ring friction-wear test under lower or both coupling condition；
(7) three directional loads in the reduced scale cun cutter ring wear process are recorded by the three-dimensional force transducer, goes forward side by side one
Step calculates the coefficient of friction of reduced scale described in wear process cun cutter ring.The reduced scale cun knife is recorded by the infrared radiation thermometer
The temperature field feature in wear process is enclosed, the friction fuel factor of the reduced scale cun cutter ring can be further analyzed；
(8) when reaching wearing- in period specified by step 1, the hydraulic motor is automatically stopped rotation, cutter ring abrasion examination
Test completion；According to the reduced scale cun cutter ring method for dismounting of step 2, the reduced scale cun cutter ring is disassembled, is weighed simultaneously to it
Abrasion loss is calculated, is then placed on observing the reduced scale cun cutter ring wear morphology feature below scanning electron microscope, analyzes its mill
Disfigurement looks, abrasion mechanism etc..
Compared with prior art, water jet auxiliary and coupling under the conditions of corrosive liquids or both may be implemented in the present invention
Under the conditions of reduced scale cun cutter ring cut extremely hard rock friction-wear test, the installation and removal of reduced scale cun cutter ring are very during test
It is convenient and simple, radius continuously adjustable is installed, and apparatus structure is stablized, due to load mistake under pole hard rock cutting can be overcome to wear
The problems such as causing device to be turned on one's side greatly.Meanwhile the abrasion test device and test method operating process being related to are simple, can directly obtain
Obtain the features such as cutting abrasion load, cutter ring temperature field, abrasion loss and the cutter ring abrasion mechanism in cutter ring wear process, therefore this
Invention can be very good true hobboing cutter cutter ring passive rotation friction and wear characteristic in model engineering, can be water jet and corrosive liquid
Under the conditions of hobboing cutter cutter ring wear-out life prediction and its wearability design provide foundation.
Detailed description of the invention
Attached drawing 1 is experimental rig positive structure schematic of the present invention；
Attached drawing 2 is extremely hard rock sample, wear-resisting roller, support base chassis part subdivision schematic top plan view；
Attached drawing 3 is the enlarged drawing of the components attachment areas such as reduced scale cun cutter ring, bearing, knife rest, spray head；
Attached drawing 4 is the oat tail groove structure schematic diagram inside crossbeam；
Attached drawing 5 is reduced scale cun cutter ring side view；
In attached drawing: 1- telescopic oil cylinder, 2- solid rack, 3- three-dimensional force transducer, 4- reduced scale cun cutter ring, 5- infrared measurement of temperature
Instrument, 6- support base outer ring, the extremely hard rock sample of 7-, the wear-resisting roller of 8-, 9- support base chassis, 10- liquid conduits, 11- are hydraulic
Motor, 12- feed bin box, 13- rack supporting rib, 14- crossbeam, 15- cross beam support muscle, 16- bearing right end cap, 17- cutter shaft, 18-
Fastening nut, 19- transverse direction spray head guide rail, 20- head cartridge, 21- spray head, 22- water jet conduit, the vertical spray head guide rail of 23-,
24- bearing left end cap, 25- bearing, 26- knife rest, 27- knife rest supporting rib, 28- gusset piece.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Hobboing cutter cutter ring wear test dress as shown in attached drawing 1, Fig. 2 and Fig. 3, under the conditions of water jet auxiliary and corrosive liquids
It sets by telescopic oil cylinder 1, three-dimensional rack 2, three-dimensional force transducer 3, reduced scale cun cutter ring 4, infrared radiation thermometer 5, support base outer ring 6,
Extremely hard rock sample 7, wear-resisting roller 8, support base chassis 9, liquid conduits 10, hydraulic motor 11, feed bin box 12, rack supporting rib
13, crossbeam 14, cross beam support muscle 15, bearing right end cap 16, cutter shaft 17, fastening nut 18, lateral spray head guide rail 19, head cartridge
20, spray head 21, water jet conduit 22, vertical spray head guide rail 23, bearing left end cap 24, bearing 25, knife rest 26, knife rest supporting rib
27, gusset piece 28 forms.
Telescopic oil cylinder 1 is fixed on the middle position of three-dimensional rack 2, and 2 right angle turn of three-dimensional bracket uses rack supporting rib
13 reinforce, and for reinforcing 2 frame entirety mechanics strength and stiffness of three-dimensional branch, 2 lower end of three-dimensional bracket is anchored on ground；Telescopic oil cylinder
1 is coupled by its piston rod with crossbeam 14, is arranged symmetrically about telescopic oil cylinder 1 there are two cross beam support muscle 15 on crossbeam 14,
For enhancing the whole mechanics strength and stiffness of crossbeam 14；Crossbeam 14 is coupled by bolt with gusset piece 28, and gusset piece 28 passes through
Three-dimensional force transducer 3 couples with knife rest 26, and oat tail groove structure is provided with inside crossbeam 14, and knife rest 26 can be in company with gusset piece 28 along dovetail
Slot sliding, to reach different installation radiuses, and finally by the locked positioning of bolt, oat tail groove structure is as shown in Figure 4.
26 two sides of knife rest are furnished with knife rest supporting rib 27, can promote the whole mechanics strength and stiffness of the knife rest 26；Knife
A pair of bearings 25 is installed in frame 26, is connected with bearing left end cap 24 and bearing right end cap 16 at left and right sides of knife rest 26, is used for locating shaft
Hold 25 outer ring, be furnished with sealing ring between bearing right end cap 16 and cutter shaft 17, for block outside water or corrosive liquids into
Enter bearing 25；25 inner ring of bearing and 17 interference fit joint of cutter shaft, cutter shaft 17 is coupled by key and reduced scale cun cutter ring 4, by fastening spiral shell
Mother 18 is screwed on cutter shaft 17, and for fastening reduced scale cun cutter ring 4, reduced scale cun cutter ring 4 can be rotated together with cutter shaft 17 and 25 inner ring of bearing；
The outer ring of bearing 25 and 26 inside interference fit joint of knife rest.
Preferably, the diameter dimension of reduced scale cun cutter ring 4 is about the 1/3 of true hobboing cutter cutter ring, and a diameter of 140mm, knife
Tread degree is 5mm, and the mechanical property after material and heat treatment is consistent with true hobboing cutter cutter ring, and the side view of reduced scale cun cutter ring is as schemed
Shown in 5.
Three-dimensional force transducer 3, knife rest 26, cutter shaft 17, reduced scale cun cutter ring 4 is symmetrical about telescopic oil cylinder 1 with fastening nut 18
Be distributed on crossbeam 14, reduced scale cun cutter ring 4 is contacted with extremely hard rock sample 7, and pass through telescopic oil cylinder 1 can possess constant pressure or
The constant depth of cut of person.
As shown in figure 3, being connected with vertical spray head guide rail 23 immediately below knife rest 26, lateral spray head guide rail 19 can be led in vertical spray head
It is moved up and down on rail 23, and is finally fastened by bolts positioning；Lateral spray head guide rail 19 is provided with oat tail groove structure, and head cartridge 20 can
It is moved left and right on lateral spray head guide rail 19, and is finally fastened by bolts positioning；Spray head 21 is connected on head cartridge 20, and is sprayed
First 21 can swing unspecified angle on head cartridge 20, and finally be positioned by bolt fastening, can install not on head cartridge 20
With the spray head 21 of structure type；In short, relative position and the relative angle of spray head 20 and reduced scale cun cutter ring 4 and extremely hard rock sample 7
Vertical spray head guide rail 23, lateral spray head guide rail 19, the control adjustment of head cartridge 20 can be passed through.
Extremely hard rock sample 7 and feed bin box 12 are circle, and extremely hard rock sample 7 is placed in feed bin box 12, and right by four
Claim the bolt fastening of distribution.In the specific implementation, each surface of extremely hard rock sample 7 is polished flat by sander, it is ensured that it is placed on
Convenient for reduced scale cun cutter ring 4 and extremely hard rock sample 7 fretting wear steadily occurs for the levelness on surface when feed bin 12 inside of box；Generally
It is preferred that selecting compressive strength of rock is more than 150MPa, diameter 500mm, it is highly the rock of 100mm as extremely hard rock sample.
The height of feed bin box 12 is higher than extremely hard rock sample 7, is generally higher by extremely hard 7 50~100mm of surface of rock sample, convenient for storage
Fill the corrosive liquids on extremely hard 7 surface of rock sample, corrosive liquids generally refers to the seawater suffered from TBM work progress, strong
Acid solution body, highly basic liquid and other to hobboing cutter cutter ring have corrosive liquid medium；12 inner surface of feed bin box is coated with anti-corrosion
Layer is lost, to guarantee that feed bin box 12 is not damaged by corrosive liquids；12 bottom of feed bin box is coupled by bolt with hydraulic motor 11, liquid
Pressure motor 11 is fixed on ground；12 edge bottom of feed bin box is contacted with several wear-resisting rollers 8, it is generally preferable to wear-resisting roller number
Amount is 12, and wear-resisting roller 8 is evenly arranged in the hemisphere face groove on support base chassis 9, and lubricating oil is contained in groove, is supported
Pedestal chassis 9 supports the edge of feed bin box 12 by wear-resisting roller 8, and when feed bin box 12 rotates, wear-resisting roller 8 can be in hemisphere
It freely rolls in the groove of face, while feed bin 12 rotary resistance of box can be effectively reduced, can also prevent due to reduced scale cun cutter ring 4
Cut abrasion load excessive phenomena such as causing feed bin box 12 to be turned on one's side.
Infrared radiation thermometer 5 is fixedly linked on support base outer ring 6, and the center of face reduced scale cun cutter ring 4, can be with
Reduced scale cun 4 entire surface Characteristics of The Distribution of Temperature of cutter ring during acquisition test in real time；Support base outer ring 6 and support base chassis
9 connection place is provided with a drainage hole, and drainage hole is connected with liquid conduits 10, rubs for water jet auxiliary reduced scale cun cutter ring 4 to be discharged
Wipe the water-jet flowing liquid or corrosive liquids overflowed when testing.
Realize that the vertical direction of reduced scale cun cutter ring 4 moves up and down by the piston rod telescopic moving control of telescopic oil cylinder 1, and
Telescopic oil cylinder 1 has the function of locked displacement and keeps constant pressure, it is ensured that reduced scale cun cutter ring 4 is ground with extremely hard rock sample 7
Constant pressure or constant depth of cut during damage；By the driving of hydraulic motor 11, feed bin box 12 and extremely hard rock are realized
The revolving speed of the uniform rotation of sample 7, hydraulic motor 11 can be with step-less adjustment, it is generally preferable to which 11 maximum (top) speed of hydraulic motor is 20
Circle is per minute.
Three-dimensional force transducer 3 is used to test reduced scale cun cutter ring 4 abrasion three under the conditions of water jet auxiliary and corrosive liquids
To load data, the ratio of circumferential load and vertical load, the friction of available hobboing cutter cutter ring cutting abrasion rock are calculated
Coefficient.
Specific test method step:
Step 1: reduced scale cun cutter ring fretting wear parameter setting
(1) radius is installed and revolving speed determines.For reduced scale cun cutter ring 4 or true cutter ring, corresponding passive revolving speed and
Shown in following two formula of relationship around 14 center of crossbeam or the revolving speed of cutter head center；
n1r1=n2r2 (1)
N1R1=N2R2 (2)
In formula, n1For the passive revolving speed of reduced scale cun cutter ring 4, r1For reduced scale cun 4 radius of cutter ring, n2For 14 revolving speed of crossbeam, r2For contracting
Installation radius of the size cutter ring 4 on crossbeam 14；N1For the passive revolving speed of true hobboing cutter cutter ring, R in engineering1Really to be rolled in engineering
Knife cutter ring radius, N2For cutterhead revolving speed true in engineering, R2For installation radius of the hobboing cutter true in engineering on cutterhead；
For hobboing cutter cutter ring friction condition true in preferable model engineering, following formula need to be met:
n1=N1 (3)
Then obtain following formula:
In the specific implementation, in order to accelerate wear test process, 14 revolving speed n of crossbeam is set2Greater than cutterhead true in engineering
Revolving speed N2, and be its integral multiple, then the installation radius of reduced scale cun cutter ring 4 can be greatly reduced, and then greatly reduce cutter ring abrasion
Experimental rig overall dimensions.For example, reduced scale cun cutter ring 4 is 1/3 of true hobboing cutter cutter ring in engineering, i.e. r1/R1=1/3, in engineering
Hobboing cutter installs radius R2When for 3m, 14 revolving speed n of crossbeam is set2It is true cutterhead revolving speed N in engineering25 times, then reduced scale cun cutter ring 4
Installation radius r2Only 0.2m has obtained very big reduction according to radius in test.
(2) cutter ring normal pressure and depth of cut determine.Under simulation hobboing cutter cutter ring constant positive pressure or constant depth of cut
Wear test when, realized respectively by constant pressure maintaining or locked displacement function by telescopic oil cylinder 1；
The constant positive pressure of reduced scale cun cutter ring 4 is determined according to the thrust in true TBM progradation, according to Hertz contact
Stress criterion, it is only necessary to guarantee that the contact stress of reduced scale cun cutter ring 4 is equal with hobboing cutter cutter ring contact stress true in engineering；
The reduced scale cun constant depth of cut of cutter ring 4 determines that method also uses Hertz contact stress criterion, though contact stress exists
Moment variation, but according to document (Study of pressure distribution within the crushed zone in
The contact area between rock and disc cutters) it is found that there are basic contact stress, such as following formula institute
Show:
In formula, P0For the basic contact stress of cutter ring,For the contact angle of cutter ring and rock, C is dimensionless factor, for normal
Section cutter ring is about 2.12, r hobboing cutter cutter ring radius；T is blade degree；H is cutter ring depth of cut；S is knife spacing, σcFor rock list
Axis compression strength, σtFor Tensile Strength of Rock；
It need to guarantee that basic contact stress and the basic contact stress of hobboing cutter cutter ring true in engineering of reduced scale cun cutter ring 4 are equal i.e.
Can, then it needs to meet following formula:
In formula, saFor reduced scale 4 knife spacing of cun cutter ring,For the contact angle of reduced scale cun cutter ring 4 and rock, raFor reduced scale cun knife
Enclose 4 radiuses, TaIt is wide for reduced scale cun 4 blade of cutter ring；sbFor hobboing cutter cutter ring knife spacing true in engineering,For hobboing cutter true in engineering
The contact angle of cutter ring and rock, rbFor hobboing cutter cutter ring radius true in engineering, TbIt is wide for hobboing cutter cutter ring blade true in engineering.
Here, by depth of cut needed for reduced scale in above-mentioned formula (6) and formula (7) available test cun cutter ring 4, with simulation
The depth of cut of true hobboing cutter cutter ring in engineering.For example, blade width is 17.8mm when hobboing cutter radius true in engineering is 216mm,
Depth of cut is 8mm, and when knife spacing is 80mm, and the radius of reduced scale cun cutter ring 4 used is 70mm in testing, and blade width is 5mm,
Knife spacing is 15mm, and according to above-mentioned two formula, the depth of cut for finding out the reduced scale cun cutter ring 4 under experimental condition is 1mm.
(3) wearing- in period determines.The abrasion distance of test reduced scale cun cutter ring 4 should be worn with hobboing cutter cutter ring true in engineering
It is equidistant, then needs to meet following formula:
2πr2n2t2=2 π R2N2T2 (7)
The then wear test time of single reduced scale cun cutter ring 4 are as follows:
In formula, t2The time required to the reduced scale cun abrasion of cutter ring 4, T2For hobboing cutter cutter ring wearing- in period true in engineering.Such as work
True hobboing cutter cutter ring wearing- in period is 1 hour in journey, the installation radius R of true hobboing cutter cutter ring in engineering2For 3m, reduced scale cun cutter ring
4 installation radius r2It is set as 0.2m, sets 14 revolving speed n of crossbeam2It is true cutterhead revolving speed N in engineering25 times, then test
Wearing- in period is 3 hours.
Step 2: reduced scale cun cutter ring installation and removal
Key: being mounted on cutter shaft 17 by the installation process of reduced scale cun cutter ring 4 first, then by reduced scale cun cutter ring 4 along axial direction
It is set on key, and withstands the stepped locations of cutter shaft 17, be positioned and postpone, fastening nut 18 is tightened on cutter shaft 17, realize contracting
The fastening of size cutter ring 4；
The disassembly process of reduced scale cun cutter ring 4: unscrewing fastening nut 18 first, and removed, then gently will with hammer
Reduced scale cun cutter ring 4 is tapped along 17 free end of cutter shaft, and takes out reduced scale cun cutter ring 4.
The installation and removal process of above-mentioned reduced scale cun cutter ring 4 is simple, without dismounting bearing 25, greatlies simplify cutter ring abrasion
Test process.
Step 3: test process operating method
(1) extremely hard rock sample 7 is placed in feed bin box 12, and be fastened by bolts locked；When corrosive liquids need to be studied
When being influenced on hobboing cutter cutter ring wearing character, the corrosive liquids of rock surface injection certain depth of the need in feed bin box 12, one
As the corrosive liquids depth that preferably covers be higher by extremely hard 7 20~30mm of surface of rock sample.When only research water jet to hobboing cutter knife
When the wearing character of circle influences, corrosive liquids is injected without the rock surface in feed bin box 12；
(2) it weighs to the reduced scale cun cutter ring 4 before abrasion, and according to the installation radius and step 2 set in step 1
In reduced scale cun cutter ring 4 installation method, reduced scale cun cutter ring 4 is mounted on the corresponding position of crossbeam 14, and be locked；
(3) telescopic oil cylinder 1 is controlled, driving crossbeam 14 is mobile to extremely hard 7 direction of rock sample, until reduced scale cun cutter ring 4 reaches
Depth of cut or normal pressure needed for test, required depth of cut or normal pressure determine according to step 1, and eventually by stretching
The locking function of contracting oil cylinder 1 guarantees constant depth of cut or constant pressure；
(4) when Research on Wear Characteristics of the water jet to hobboing cutter cutter ring need to be studied, by adjusting lateral spray head guide rail 19, spray
Head bracket 20, vertical spray head guide rail 23, determine the relative position of spray head 21 and reduced scale cun cutter ring 4, and regulate required water jet
The design parameters such as pressure, flow velocity；
(5) couple three-dimensional force transducer 3 and external dynamic deformeter, and start three-dimensional force transducer 3, dynamic strain indicator and
Infrared radiation thermometer 5 prepares the abrasion load and temperature field feature of real-time testing reduced scale cun cutter ring 4；
(6) according to 11 revolving speed of hydraulic motor and wearing- in period of a kind of setting of step, start hydraulic motor 11, make hydraulic horse
Rotational speed is kept constant up to 11；When need to study water jet influences the wearing character of hobboing cutter cutter ring, start hydraulic motor 11
While, water jet pumping plant need to be started simultaneously according to the water jet parameter of setting；When only research corrosive liquids to hobboing cutter cutter ring
Wearing character influence when, without starting water jet pumping plant.It is final realize under the conditions of water jet auxiliary and corrosive liquids or
The friction-wear test of reduced scale cun cutter ring 4 under the two coupling condition；
(7) three directional loads in the reduced scale cun cutting wear process of cutter ring 4 are recorded by three-dimensional force transducer 3, and further
The coefficient of friction of reduced scale cun cutter ring 4 in wear process is calculated, in the specific implementation, calculates coefficient of friction with reference to following formula；Pass through
Infrared radiation thermometer 5 records the temperature field feature in reduced scale cun 4 wear process of cutter ring, can further analyze rubbing for reduced scale cun cutter ring 4
Chafing effect；
In formula, μ is coefficient of friction, FrFor circumferential load, FvFor vertical load；
(8) when reaching wearing- in period specified by step 1, hydraulic motor 11 is automatically stopped rotation, cutter ring wear test
It completes.According to the method for dismounting of the reduced scale cun cutter ring 4 of step 2, reduced scale cun cutter ring 4 is disassembled, is weighed to it, in conjunction with step
Suddenly the initial weighing in (2) calculates the abrasion loss of reduced scale cun cutter ring 4, is then placed on observation contracting below scanning electron microscope
The wear morphology feature of size cutter ring 4, analyzes its wear morphology, abrasion mechanism etc.；
Embodiments of the present invention are described in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode.For those skilled in the art, can the invention patent other structures easy to accomplish design and test method repair
Change.Therefore, without departing from the general concept defined in the claims and the equivalent scope, the present invention is not limited to specific details
With legend shown here.
Claims (7)
1. cutter ring abrasion test device under a kind of water jet and corrosive liquid, it is characterised in that: by telescopic oil cylinder (1), three-dimensional machine
Frame (2), three-dimensional force transducer (3), reduced scale cun cutter ring (4), infrared radiation thermometer (5), support base outer ring (6), extremely hard rock sample
(7), wear-resisting roller (8), support base chassis (9), liquid conduits (10), hydraulic motor (11), feed bin box (12), rack support
Muscle (13), crossbeam (14), cross beam support muscle (15), bearing right end cap (16), cutter shaft (17), fastening nut (18), lateral spray head
Guide rail (19), head cartridge (20), spray head (21), water jet conduit (22), vertical spray head guide rail (23), bearing left end cap
(24), bearing (25), knife rest (26), knife rest supporting rib (27), gusset piece (28) composition；
Telescopic oil cylinder (1) is fixed on the middle position of three-dimensional rack (2), and three-dimensional bracket (2) right angle turn is supported using rack
Muscle (13) is reinforced, and three-dimensional bracket (2) lower end is anchored on ground；Telescopic oil cylinder (1) is coupled by its piston rod with crossbeam (14),
It is arranged symmetrically about telescopic oil cylinder (1) there are two cross beam support muscle (15) on crossbeam (14), crossbeam (14) passes through bolt and connection
Fishplate bar (28) connection, gusset piece (28) are coupled by three-dimensional force transducer (3) with knife rest (26)；
Knife rest (26) two sides are furnished with knife rest supporting rib (27), install a pair of bearings (25) in knife rest (26), and bearing (25) inner ring connects
Have cutter shaft (17), equipped with reduced scale cun cutter ring (4) on cutter shaft, reduced scale cun cutter ring (4) is contacted with extremely hard rock sample (7)；It is closed on crossbeam
The components such as two sets of reduced scales cun cutter ring (4), knife rest (26), three-dimensional force transducer (3) are symmetrically furnished in telescopic oil cylinder；
It is connected with vertical spray head guide rail (23) immediately below knife rest (26), is connected with lateral spray head guide rail on vertical spray head guide rail (23)
(19), lateral spray head guide rail (19) is connected with head cartridge (20), and spray head (21) is connected on head cartridge (20)；
Extremely hard rock sample (7) is placed in feed bin box (12), and by four symmetrical bolt fastenings；The height of feed bin box (12)
Degree is higher than extremely hard rock sample (7), and feed bin box (12) inner surface is coated with corrosion-resistant coating；Feed bin box (12) bottom by bolt with it is hydraulic
Motor (11) connection, hydraulic motor (11) are fixed on ground；
Infrared radiation thermometer (5) is fixedly linked on support base outer ring (6), and the center of face reduced scale cun cutter ring (4)；Branch
The connection place of support pedestal outer ring (6) and support base chassis (9) is provided with a drainage hole, and drainage hole is connected with liquid conduits (10).
2. cutter ring abrasion test device under a kind of water jet according to claim 1 and corrosive liquid, it is characterised in that: horizontal
Oat tail groove structure is provided with inside beam (14), knife rest (26) can be slided in company with gusset piece (28) along dovetail groove, to reach different installations
Radius, and can be by the locked positioning of bolt.
3. cutter ring abrasion test device under a kind of water jet according to claim 1 and corrosive liquid, it is characterised in that: knife
It is connected with bearing left end cap (24) and bearing right end cap (16) at left and right sides of frame (26), for positioning the outer ring of bearing (25), bearing
Sealing ring is furnished between right end cap (16) and cutter shaft (17)；Bearing (25) inner ring and cutter shaft (17) interference fit joint, cutter shaft (17) are logical
Key and reduced scale cun cutter ring (4) connection are crossed, is screwed on cutter shaft (17) by fastening nut (18), for fastening reduced scale cun cutter ring (4),
Reduced scale cun cutter ring (4) can be rotated together with cutter shaft (17) and bearing (25) inner ring；The internal mistake in the outer ring and knife rest (26) of bearing (25)
It is full of connection.
4. cutter ring abrasion test device under a kind of water jet according to claim 1 and corrosive liquid, it is characterised in that: horizontal
It can be moved up and down on vertical spray head guide rail (23) to spray head guide rail (19), and positioning can be fastened by bolts；Lateral spray head guide rail
(19) it is provided with oat tail groove structure, head cartridge (20) can move left and right on lateral spray head guide rail (19), and can be fastened by bolts
Positioning；Spray head (21) can swing unspecified angle on head cartridge (20), and can be positioned by bolt fastening, on head cartridge (20)
The spray head (21) of different structure form can be installed.
5. cutter ring abrasion test device under a kind of water jet according to claim 1 and corrosive liquid, it is characterised in that: material
Box (12) edge bottom in storehouse is contacted with several wear-resisting rollers (8), and wear-resisting roller (8) is evenly arranged in support base chassis (9)
Hemisphere face groove in, support base chassis (9) support the edges of feed bin box (12) by wear-resisting roller (8).
6. cutter ring abrasion test device under a kind of water jet according to claim 1 and corrosive liquid, it is characterised in that: red
Entire surface temperature profile of the outer temperature measurer (5) for real-time monitoring reduced scale cun cutter ring (4)；Telescopic oil cylinder (1) has locked position
Move and keep constant the function of pressure；The revolving speed of hydraulic motor (11) can be with step-less adjustment；Three-dimensional force transducer (3) can be real-time
Three directional loads data are worn in the cutting for monitoring reduced scale cun cutter ring (4).
7. cutter ring abrasion test device test method under a kind of water jet and corrosive liquid, which is characterized in that this method includes such as
Lower step:
Step 1: reduced scale cun cutter ring fretting wear parameter setting
1) radius is installed and revolving speed determines
For reduced scale cun cutter ring (4) perhaps its corresponding passive revolving speed of true cutter ring and in crossbeam (14) center or cutterhead
Shown in following two formula of the relationship of the revolving speed of the heart；
n1r1=n2r2 (1)
N1R1=N2R2 (2)
In formula, n1For reduced scale cun cutter ring (4) passive revolving speed, r1For reduced scale cun cutter ring (4) radius, n2For crossbeam (14) revolving speed, r2For
Installation radius of the reduced scale cun cutter ring (4) on crossbeam (14)；N1For the passive revolving speed of true hobboing cutter cutter ring, R in engineering1For in engineering
True hobboing cutter cutter ring radius, N2For cutterhead revolving speed true in engineering, R2For installation radius of the hobboing cutter true in engineering on cutterhead；
For hobboing cutter cutter ring friction condition true in preferable model engineering, following formula need to be met:
n1=N2 (3)
Then obtain following formula:
2) cutter ring normal pressure and depth of cut determine
The constant positive pressure of reduced scale cun cutter ring (4) is determined according to the thrust in true TBM progradation, is answered according to Hertz contact
Power criterion, it is only necessary to guarantee that the contact stress of reduced scale cun cutter ring (4) is equal with hobboing cutter cutter ring contact stress true in engineering；
Reduced scale cun cutter ring (4) constant depth of cut determines that method also uses Hertz contact stress criterion, according to basic contact stress
Formula calculation method, is shown below:
In formula, P0For the basic contact stress of cutter ring,For the contact angle of cutter ring and rock, C is dimensionless factor, for normal section
Cutter ring is about 2.12, r hobboing cutter cutter ring radius；T is blade degree；H is cutter ring depth of cut；S is knife spacing, σcIt is anti-for Rock Under Uniaxial Compression
Compressive Strength, σtFor Tensile Strength of Rock；
It need to guarantee that basic contact stress and the basic contact stress of hobboing cutter cutter ring true in engineering of reduced scale cun cutter ring (4) are equal i.e.
Can, then it needs to meet following formula:
In formula, saFor reduced scale cun cutter ring (4) knife spacing,For the contact angle of reduced scale cun cutter ring (4) and rock, raFor reduced scale cun knife
Enclose (4) radius, TaIt is wide for reduced scale cun cutter ring (4) blade；sbFor hobboing cutter cutter ring knife spacing true in engineering,It is true in engineering
The contact angle of hobboing cutter cutter ring and rock, rbFor hobboing cutter cutter ring radius true in engineering, TbFor hobboing cutter cutter ring blade true in engineering
It is wide；
3) wearing- in period determines
The abrasion distance of test reduced scale cun cutter ring (4) should be worn with hobboing cutter cutter ring true in engineering to be equidistant, then needs to meet
Following formula:
2πr2n2t2=2 π R2N2T2 (7)
The wear test time of single reduced scale cun cutter ring (4) are as follows:
In formula, t2The time required to reduced scale cun cutter ring (4) abrasion, T2For hobboing cutter cutter ring wearing- in period true in engineering；
Step 2: reduced scale cun cutter ring installation and removal
Key: being mounted on cutter shaft (17) by the installation process of reduced scale cun cutter ring (4) first, then by reduced scale cun cutter ring (4) along axis
To being set on key, and the stepped locations of cutter shaft (17) are withstood, is positioned and postpones, fastening nut (18) is tightened in cutter shaft (17)
On, realize the fastening of reduced scale cun cutter ring (4)；
The disassembly process of reduced scale cun cutter ring (4): unscrewing fastening nut (18) first, and removed, then gently will with hammer
Reduced scale cun cutter ring (4) is tapped along cutter shaft (17) free end, and takes out reduced scale cun cutter ring (4)；
Step 3: test process operating method
1) extremely hard rock sample (7) is placed in feed bin box (12), and be fastened by bolts locked；When corrosive liquids pair need to be studied
When hobboing cutter cutter ring wearing character influences, the corrosive liquids of the rock surface injection certain depth in feed bin box (12) is needed；When
When only research water jet influences the wearing character of hobboing cutter cutter ring, corrosivity is injected without the rock surface in feed bin box (12)
Liquid；
2) it weighs to the reduced scale cun cutter ring (4) before abrasion, and according in the installation radius and step 2 set in step 1
Reduced scale cun cutter ring (4) installation method, reduced scale cun cutter ring (4) is mounted on the corresponding position of crossbeam (14), and be locked
It is good；
3) telescopic oil cylinder (1) is controlled, driving crossbeam (14) is mobile to extremely hard rock sample (7) direction, until reduced scale cun cutter ring (4) reaches
Depth of cut or normal pressure needed for test, required depth of cut or normal pressure are determining according to step 1, and eventually by
The locking function of telescopic oil cylinder (1), guarantees constant depth of cut or constant pressure；
4) when Research on Wear Characteristics of the water jet to hobboing cutter cutter ring need to be studied, by adjusting lateral spray head guide rail (19), spray head
Bracket (20), vertical spray head guide rail (23), determine the relative position of spray head (21) and reduced scale cun cutter ring (4), and regulate required
The design parameters such as pressure, the flow velocity of water jet；
5) couple three-dimensional force transducer (3) and external dynamic deformeter, and start three-dimensional force transducer (3), dynamic strain indicator and
Infrared radiation thermometer (5) prepares the abrasion load and temperature field feature of real-time testing reduced scale cun cutter ring (4)；
6) according to a kind of hydraulic motor of setting (11) revolving speed of step and wearing- in period, start hydraulic motor (11), make hydraulic horse
Rotational speed is kept constant up to (11)；When need to study water jet influences the wearing character of hobboing cutter cutter ring, start hydraulic motor
(11) while, water jet pumping plant need to be started simultaneously according to the water jet parameter of setting；When only research corrosive liquids to hobboing cutter
When the wearing character of cutter ring influences, without starting water jet pumping plant；Under the conditions of final realization water jet auxiliary and corrosive liquids
Or both reduced scale cun cutter ring (4) under coupling condition friction-wear test；
7) three directional loads in reduced scale cun cutter ring (4) cutting wear process are recorded by three-dimensional force transducer (3), and further counted
Calculate the coefficient of friction of reduced scale cun cutter ring (4) in wear process；Reduced scale cun cutter ring (4) abrasion is recorded by infrared radiation thermometer (5)
Temperature field feature in the process can further analyze the friction fuel factor of reduced scale cun cutter ring (4)；
8) when reaching wearing- in period specified by step 1, hydraulic motor (11) is automatically stopped rotation, and cutter ring wear test is complete
At；According to the method for dismounting of the reduced scale cun cutter ring (4) of step 2, reduced scale cun cutter ring (4) is disassembled, is weighed to it, in conjunction with
Initial weighing in step 2) calculates the abrasion loss of reduced scale cun cutter ring (4), is then placed on observation below scanning electron microscope
The wear morphology feature of reduced scale cun cutter ring (4), analyzes its wear morphology, abrasion mechanism etc..
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| CN111122370A (en) * | 2019-12-31 | 2020-05-08 | 中铁工程服务有限公司 | Test device capable of simulating eccentric load working condition of TBM cutter head |
| CN112763308A (en) * | 2020-12-29 | 2021-05-07 | 哈尔滨工程大学 | Multi-degree-of-freedom erosion auxiliary system capable of continuously adjusting and monitoring in real time |
| CN113790970A (en) * | 2021-09-02 | 2021-12-14 | 中国电建集团贵阳勘测设计研究院有限公司 | Testing method for cutting concrete compressive strength by using water gun |
| CN113866030A (en) * | 2021-10-08 | 2021-12-31 | 杭州电子科技大学 | Precision-maintaining life prediction method and device for precision complex broach |
| CN113959885A (en) * | 2021-11-26 | 2022-01-21 | 山东农业大学 | Cutting knife abrasion corrosion test bed and test method |
| CN113984566A (en) * | 2021-10-15 | 2022-01-28 | 四川大学 | Micro-lubrication-based friction wear machine for contrast test ring block and test method thereof |
| CN114018740A (en) * | 2021-10-26 | 2022-02-08 | 武汉大学 | Small-size rock abrasiveness testing device and method |
| CN114769283A (en) * | 2022-04-14 | 2022-07-22 | 江苏杰夏环保科技有限公司 | SMP-based control processing system and processing method |
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| CN111101962A (en) * | 2019-11-28 | 2020-05-05 | 沈阳建筑大学 | Multipurpose hob cutter head test bench and operation method |
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| CN112763308A (en) * | 2020-12-29 | 2021-05-07 | 哈尔滨工程大学 | Multi-degree-of-freedom erosion auxiliary system capable of continuously adjusting and monitoring in real time |
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| CN113984566B (en) * | 2021-10-15 | 2022-07-22 | 四川大学 | Micro-lubrication-based friction wear machine for comparison test ring block and test method thereof |
| CN114018740A (en) * | 2021-10-26 | 2022-02-08 | 武汉大学 | Small-size rock abrasiveness testing device and method |
| CN113959885A (en) * | 2021-11-26 | 2022-01-21 | 山东农业大学 | Cutting knife abrasion corrosion test bed and test method |
| CN114769283A (en) * | 2022-04-14 | 2022-07-22 | 江苏杰夏环保科技有限公司 | SMP-based control processing system and processing method |
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