CN102680328A - Electrical large strain control type ring shearing apparatus - Google Patents

Electrical large strain control type ring shearing apparatus Download PDF

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Publication number
CN102680328A
CN102680328A CN2011104020138A CN201110402013A CN102680328A CN 102680328 A CN102680328 A CN 102680328A CN 2011104020138 A CN2011104020138 A CN 2011104020138A CN 201110402013 A CN201110402013 A CN 201110402013A CN 102680328 A CN102680328 A CN 102680328A
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China
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shear
shearing
sensor
box
mounting disc
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CN2011104020138A
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CN102680328B (en
Inventor
蔺晓燕
张常亮
李萍
李同录
赵纪飞
邢鲜丽
王昌业
李振江
黄丽娟
王阿丹
张亚国
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Changan University
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Changan University
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Publication of CN102680328B publication Critical patent/CN102680328B/en
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Abstract

The invention discloses an electrical large strain control type ring shearing apparatus. The electrical large strain control type ring shearing apparatus comprises a foundation base and a platform, wherein the platform is arranged above the foundation base through a supporting rod; a controller, a shearing pinion control unit and a shearing box gap control unit are arranged between the platform and the foundation base; a shearing unit and a vertical unit are arranged on the platform; a gap control structure is arranged between an upper shearing box and a lower shearing box of the ring shearing apparatus to guarantee the tightness of the lower shearing box so as to effectively prevent a sample from leaking in an experiment process; speed control is realized through gear transmission and a controller, the maximum shearing speed can reach 588cm/s, and compared with a domestic ring shearing speed of 1r/min, high-speed ring shearing is truly realized; shear failure is realized through the transmission of a gear mechanism; and ring rotations are carried out by the lower shearing box, so that the sample can be shorn under a continuous displacement condition, that is to say, the shearing displacement is not limited.

Description

Electronic large-scale strain control type ring shear apparatus
Technical field
The invention belongs to the Geotechnical Engineering field, be specifically related to a kind of ring shear apparatus, particularly a kind of electronic large high-speed strain control type ring shear apparatus.
Background technology
Ring shear apparatus is a kind of of Geotechnical Engineering field laboratory experiment instrument, is mainly used in the mensuration of ground motion shear resistance parameter.For the slipping plane on natural landslide, the soil body can be because of repeatedly sliding produce sizable distortion, when analysis of landslide stable, should adopt residual strength.The shearing strength that ring shear apparatus then can be measured ground is with the Changing Pattern that displacement increases, and is specially adapted to measure the residual strength of soil after the big displacement.
It is that soil sample is packed in the ring specimen box that ring is cut experiment, through the top increased pressure board sample is applied pressure at right angle, applies certain shearing that reverses to soil sample on this basis and makes it that process of destroying take place.Ring shear apparatus is divided into two types by its architectural feature, i.e. monocyclic ring shear apparatus and dicyclic ring shear apparatus.Wherein, The monocyclic ring shear apparatus is that soil sample is packed in the monoblock type monocycle cylindrical shape shear box; Certain in addition shearing that reverses when soil sample being applied pressure at right angle through increased pressure board; Its shear failure of soil sample of using this kind ring shear apparatus to experimentize is not to occur in soil sample inside, but comes across near rotation increased pressure board place, and therefore measured data can not reflect the true mechanical index of soil sample.The dicyclic ring shear apparatus is that monoblock type monocycle shear box is designed to two annular shear boxs that separate up and down; The soil sample of using this kind ring shear apparatus to experimentize is sheared along the preset face of ring box contact up and down; Realized that ring truly cuts; But this kind ring shear apparatus is the difficult control of spacing of shear box up and down, and squeeze-out phenomenon appears in soil sample easily in experimentation.
At present, domestic achievement about ring shear apparatus development and exploitation is still few, and the ring shear apparatus of being developed is also mostly to be small-sized ring shear apparatus; This kind ring shear apparatus shear box size is less than normal, and consequent stress concentration effect is bigger to the influence of experimental data, and its loading is less; Shear rate is also lower; Maximal rate generally can only reach 1r/min, so its range of application is very limited, can not satisfy scientific research and need of real project.By contrast, developed countries has carried out the long period the development of ring shear apparatus, and large-scale ring shear apparatus and high automation ring shear apparatus are also come out one after another; But the compression system and the jacking system of external ring shear apparatus all adopt hydraulic means; The stable work in work of this hydraulic means, reliability is better, but in use there are several big defectives in it; Pollute as in experimentation, being prone to produce seepage, existing; Be unfavorable for daily servicing, and maintenance cost is higher; Installation procedure is loaded down with trivial details especially, need to lay a large amount of pipelines, and these pipelines can bring inconvenience to experimentation, needs to be equipped with hydraulic power source and related accessory, like hydraulic pump etc.In addition, external ring shear apparatus costs an arm and a leg, and it is applied also and has difficulty in taking a step, domestic use very few.
Comprehensive above-mentioned situation can know, the independent development of the at present domestic relevant large high-speed ring shear apparatus that is fit to requirement of engineering and exploitation be the genus blank also, the big limitations of shortage of instrument the mensuration of correlation parameter, the further investigation of geologic hazard has been caused very big influence.
Summary of the invention
Defective or deficiency to above-mentioned prior art existence; The objective of the invention is to; A kind of electronic large high-speed strain control type ring shear apparatus is provided; This ring shear apparatus is provided with the clearance control structure between last shear box, down cut box, guarantee the sealing of shear box up and down, effectively prevents sample seepage in the experimentation; Realize speed control through gear drive and controller, its maximum shear speed can reach 588cm/s, compares the ring rate of shear degree of domestic 1r/min, has realized high-speed annular shearing truly; Realize shear failure through the gear mechanism transmission, the down cut box carries out is that annular is rotated, and can realize that sample shears under continuous displacement condition, realizes that promptly shear displacemant do not limit.
In order to achieve the above object, the present invention adopts the scheme of following technological final result:
A kind of electronic large-scale strain control type ring shear apparatus is characterized in that, comprises sole plate and platform; Said platform is installed in said sole plate top through support bar; Between platform and sole plate, be provided with controller, shear pinion wheel control module and shear box gap control unit; Cut cells and vertical unit are installed on platform;
Said shearing pinion wheel control module comprises reducer casing, shearing pinion shaft, shearing moment sensor, shears pinion shaft front end block bearing, shears pinion shaft end bearing bearing, shears bevel gear pair and shear servomotor; Wherein, Shearing servomotor is fixed on the said sole plate; The output terminal of shearing servomotor connects reducer casing; The output terminal of reducer casing connects a gear shearing bevel gear pair, and another gear of shearing bevel gear pair is through shearing pinion shaft end bearing Bearing Installation on sole plate; Shear the top of bevel gear pair shearing pinion shaft and shearing moment sensor are installed successively; Wherein, the bearing of shearing moment sensor upper end is upward through platform and is connected with shearing pinion shaft front end block bearing;
Said shear box gap control unit comprises gap sensor, clearance control servomotor, gap adjustment bevel gear pair and axis, and wherein, axis passes platform, and the lower end of axis is installed intermittently sensor, gap adjustment bevel gear pair successively; The clearance control servomotor also is installed on the sole plate, and the output terminal of this clearance control servomotor is connected with gap adjustment bevel gear pair;
Said cut cells comprises shear box, down cut box, upward shear box mounting disc, the mounting disc of down cut box, shears gear wheel, shears pinion wheel; Wherein, Shear gear wheel and be positioned at platform central authorities; Symmetry is installed two fixed bars on the platform of shearing gear wheel both sides, and the mounting disc of down cut box is fixed on shears on the gear wheel, the top coaxial successively installation down cut box of down cut box mounting disc, upward shear box and last shear box mounting disc; Wherein, be connected through bolt between the mounting disc of down cut box and the down cut box, also be connected between last shear box and the last shear box mounting disc through bolt; Shear pinion wheel and be installed on the shearing pinion shaft front end block bearing, and shear pinion wheel and shear the gear wheel engagement;
Said vertical unit comprises symmetrically arranged two first straight line electric cylinders, adapter sleeve, connecting link, top loading unit; Wherein, the top loading unit comprises pull pressure sensor, spherical hinge, the second straight line electric cylinder, crossbeam, balance stem, pressure at right angle distributing disc, transmission rod, increased pressure board; Wherein, the balance stem two ends are fixed on said two fixed bars upper end, the parallel balance stem below that is positioned at of crossbeam, and two fixed bars pass crossbeam and this crossbeam can the upper and lower slip of relative fixed bar; Described two first straight line electric cylinders are separately positioned on the outside of described two fixed bars through straight line electric cylinder bottom seat, and the electronic cylinder axle of said two first straight line electric cylinders is fixed on the two ends of crossbeam through connecting link and setscrew nut; The electronic cylinder axle of the first straight line electric cylinder is connected with connecting link through adapter sleeve; The second straight line electric cylinder is fixed on the center of said crossbeam below; Below the second straight line electric cylinder, connect spherical hinge, pull pressure sensor and pressure at right angle distributing disc successively; Below the pressure at right angle distributing disc through the fixing increased pressure board of several transmission rods, at the lower surface of increased pressure board through the mounting disc of bolt connection down cut box;
The upper end of said axis is passed the center of shearing gear wheel, the mounting disc of down cut box, down cut box, last shear box, last shear box mounting disc and increased pressure board successively, and the middle shaft-cup that the upper end of this axis is fixed on the increased pressure board center covers;
Said clearance control servomotor, shear servomotor, two the first straight line electric cylinders, the second straight line electric cylinders, intermittently sensor, shearing moment sensor connect controller respectively.
The present invention also comprises following other technologies characteristic:
Said shearing servomotor is fixed on the said sole plate through shearing the servomotor base.
On the said sole plate support is installed, said controller is fixed on the said support, and said clearance control servomotor is fixed on the said support through clearance control servomotor base.
The said shear box mounting disc bottom outer surface of going up evenly is provided with a plurality of sheets convexities, and it is protruding also to be provided with a plurality of sheets on the bottom surface in the mounting disc of down cut box.
Said down cut box and said going up between the shear box are provided with rubber ring.
The below of said pressure at right angle distributing disc is through the fixing said increased pressure board of a transmission rod.
Said ring shear apparatus also comprises pore water pressure sensor, and said pore water pressure sensor is installed in said going up in the hole that is provided with on the shear box sidewall.
Said ring shear apparatus also comprises the perpendicular displacement sensor, and said perpendicular displacement sensor is fixed on the fixed bar through the perpendicular displacement sensor stand, and the lower end of perpendicular displacement sensor contacts with the upper surface of said pressure at right angle distributing disc.
Said ring shear apparatus also comprises the shear displacemant sensor, and said shear displacemant sensor is fixed on the said fixed bar and with the mounting disc of said down cut box through the shear displacemant sensor stand and contacts.
Said ring shear apparatus also comprises the shearing resistance sensor, and said shearing resistance sensor is installed on the said fixed bar and with said upward shear box mounting disc and contacts.
Compare with existing ring shear apparatus, the advantage of electronic large high-speed strain control type ring shear apparatus of the present invention is following:
1, the present invention is the ring shear apparatus of dicyclic, in whole experiment the down cut box with respect on the shear box initial ring to shearing, guaranteed that the area of shear surface remains constant.
2, go up the 40cm of the size of shear box, down cut box by the shear box of domestic traditional instrument 2Increase to 392.7cm 2, it specifically is of a size of internal diameter 20cm, external diameter 30cm, maximum dress appearance height 10cm.Improved the size effect that small sample is sheared, the experimental data that records can reflect the mechanical index of soil sample more realistically.
3, upward shear box, down cut box are processed with the PEEK material.The PEEK material is a kind of thermoplastic special engineering plastic, has performances such as favorable mechanical performance and chemicals-resistant, wear-resistant, hydrolysis, and light specific gravity has extraordinary processing characteristics, can be injection molded into any high-strength transparence plastic part.The PEEK material has high glass transition and fusing point, and load thermal change type temperature is up to 316 ℃, and serviceability temperature is 260 ℃ continuously.In addition, the PEEK material has outstanding self lubricity in all plastics, is particularly suitable for being strict with low-friction coefficient and abrasion performance purposes and uses.Simultaneously, adopt transparent material making shear box to be more conducive to the experimenter and in experimentation, observe the sample state.
4, upward be provided with high-precision gap sensor and clearance control servomotor between shear box, the down cut box, guaranteed the sealing of upper and lower shear box, can effectively prevent sample seepage in the experimentation.
5, the present invention is a kind of high speed ring shear apparatus; Realize speed control through gear drive and controller; Its maximum shear speed can reach 588cm/s; Compare the ring rate of shear degree of domestic 1r/min, realized high-speed annular shearing truly, for landslide, mud-rock flow movement Study on Mechanism provide experiment condition.Simultaneously; Therefore the range of application of ring shear apparatus has also obtained expansion; Generate the back to the residual strength Study on Properties by being mainly used in the soil body at first at shear surface; Expand to and relate in the middle of the research relevant with soil body shear failure process, but the STRESS VARIATION that takes place like sample under the situation such as simulated earthquake, underground water fluctuation, contingent liquefaction phenomenon etc.
6, the present invention mainly realizes shear failure through gear mechanism (promptly shear pinion wheel 8, shear gear wheel 32) transmission; What the down cut box carried out is that annular is rotated; As long as shearing pinion wheel does not stop operating; Shear box can produce a relative displacement up and down, can realize that sample shears under continuous displacement condition, realizes that promptly shear displacemant do not limit.In the sloping body of reality slided, it is much that the phenomenon of hundreds of meters of Mi Naizhi is counted in slip, and therefore these characteristics of the present invention are significant for the shear strength characteristics of rock soil mass motion in the research landslide.
7, the present invention adopts the vertical loading structure; Abandon original hydraulic loaded mechanism; Adopt the more advanced electronic cylinder of technology to apply vertical load; And be furnished with high-accuracy electron device (controller, shear displacemant sensor, shearing moment sensor, gap sensor, perpendicular displacement sensor, pore water pressure sensor, motor, reducer casing etc.) experimentation is controlled, can realize quick loading, load and apply big load continuously.The maximum perpendicular load that the present invention can apply is 4 tons, and the maximum that imposes on sample can reach 1000kPa.Compare with hydraulic mechanism, electronic cylinder has stability suitable with it and reliability, also possesses the inaccessible advantage of a lot of hydraulic mechanisms simultaneously, and is light like electronic cylinder system weight; Has the good long term storing property; There is not fluid seepage, pollution-free problem; Be easy to detect, safeguard, operating cost is low; Easy for installation, simple plug-in type electromagnetic connects, and need not be equipped with the central liquid potential source, need not lay pipeline and leak check or pollution, only needs to lay electric line; Do not need cooling, the nominal load power efficiency is high.Except compression system adopts electronic cylinder, the mechanism that accomplishes compression system up-down task equally also adopts electronic cylinder, we can say that adopting electronic cylinder is the maximum characteristics of the present invention.
8, each parts all adopts mechanical connection, especially conveniently carries out part replacement, has practiced thrift cost.
Description of drawings
Fig. 1 is a structural representation of the present invention.The symbol implication is following among the figure: the 1-sole plate; The 2-reducer casing; 3-shears pinion shaft; 4-shearing moment sensor; 5-shears pinion shaft front end block bearing; The 6-platform; 7-straight line electric cylinder bottom seat; 8-shears pinion wheel; 9-shear displacemant sensor stand; 10-shear displacemant sensor; The 11-rubber ring; The 12-shearing resistance sensor 13-first straight line electric cylinder; The 14-pull pressure sensor; The 15-spherical hinge; The 16-adapter sleeve; The 17-second straight line electric cylinder; The 18-setscrew nut; The 19-crossbeam; The 20-balance stem; 21-perpendicular displacement sensor; 22-perpendicular displacement sensor stand; 23-pressure at right angle distributing disc; The 24-transmission rod; Shaft-cup among the 25-; The 26-increased pressure board; The last shear box mounting disc of 27-; 28-pore water pressure sensor 29-goes up shear box; 30-down cut box; The mounting disc of 31-down cut box; 32-shears gear wheel; The 33-gap sensor; 34-clearance control servomotor; 35-clearance control servomotor base; The 36-support; 37-gap adjustment bevel gear pair; The 38-axis; 39-shears pinion shaft end bearing bearing; 40-shears bevel gear pair; 41-shears the servomotor base; 42-shears servomotor; The 43-controller; The 44-support bar; The 45-fixed bar; The 46-connecting link.
Fig. 2 is the structural representation of the last shear box mounting disc of back-off state.
Fig. 3 is a down cut box mounting disc structural representation.
Fig. 4 is a reducer casing inner structure schematic diagram.Wherein, (a) be overall structural arrangement figure; Label among the figure is represented the gear sequence number, and the number of teeth of each gear is following: Z 47=25, Z 48=75, Z 49=50, Z 50=50, Z 51=65, Z 52=35, Z 53=85, Z 54=35, Z 55=75, Z 56=45, Z 57=40, Z 58=60, Z 59=40, Z 60=60, Z 61=35; Gearing mesh arrangenent diagram when (b) being 1 grade; Gearing mesh arrangenent diagram when (c) being 2 grades; Gearing mesh arrangenent diagram when (d) being 3 grades; Gearing mesh arrangenent diagram when (e) being 4 grades.
Below in conjunction with accompanying drawing and embodiment the present invention is done further and to explain.
Embodiment
As shown in Figure 1, electronic large-scale strain control type boxshear apparatus of the present invention comprises sole plate 1 and platform 6, and platform 6 is installed in sole plate 1 top through some support bars 44; Between platform 6 and sole plate 1, be provided with controller 43, shear pinion wheel control module and shear box gap control unit; Cut cells and vertical unit are installed on platform 6.
Said shearing pinion wheel control module comprises reducer casing 2, shearing pinion shaft 3, shearing moment sensor 4, shears pinion shaft front end block bearing 5, shears pinion shaft end bearing bearing 39, shears bevel gear pair 40 and shear servomotor 42; Wherein, Shearing servomotor 42 is fixed on the sole plate 1 through shearing servomotor base 41; The output terminal of shearing servomotor 42 connects reducer casing 2; The output terminal of reducer casing 2 connects a gear shearing bevel gear pair 40, and another gear of shearing bevel gear pair 40 is installed on the sole plate 1 through shearing pinion shaft end bearing bearing 39; Shear the top of bevel gear pair 40 shearing pinion shaft 3 and shearing moment sensor 4 are installed successively; Wherein, the bearing of shearing moment sensor 4 upper ends is upward through platform 6 and shears pinion shaft front end block bearing 5 and be connected.
Said shear box gap control unit comprises gap sensor 33, clearance control servomotor 34, gap adjustment bevel gear pair 37 and axis 38; Wherein, Said axis 38 passes platform 6, and the lower end of axis 38 is installed sensor at said intermittence, gap adjustment bevel gear pair 37 successively; Support 36 is installed on the sole plate 1; Said controller 43 is fixed on the said support 36; Said clearance control servomotor 34 is fixed on the support 36 through clearance control servomotor base 35, and the output terminal of this clearance control servomotor 34 is connected with gap adjustment bevel gear pair 37.
Said cut cells comprises shear box 29, down cut box 30, upward shear box mounting disc 27, down cut box mounting disc 31, shears gear wheel 32, shears pinion wheel 8, shear displacemant sensor 10 and shearing resistance sensor 12; Wherein, Shear gear wheel 32 and be positioned at platform 6 central authorities; Symmetry is installed two fixed bars 45 on the platform 6 of shearing gear wheel 32 both sides; Down cut box mounting disc 31 is fixed on shears on the gear wheel 32, the said down cut box of the coaxial successively installation in the top of down cut box mounting disc 31 30, goes up shear box 29, goes up shear box mounting disc 27; Be provided with rubber ring 11 between down cut box 30 and the last shear box 29; Said shear box 29 sidewalls of going up are provided with the hole, and pore water pressure sensor 28 is installed in this hole; Wherein, be connected through bolt between down cut box mounting disc 31 and the down cut box 30, also be connected between last shear box 29 and the last shear box mounting disc 27 through bolt; Said shearing resistance sensor 12 is installed on the fixed bar 45 and with said upward shear box mounting disc 27 and contacts; Said shearing pinion wheel 8 is installed in to be sheared on the pinion shaft front end block bearing 5 and shearing pinion wheel 8 and 32 engagements of shearing gear wheel; Said shear displacemant sensor 10 is fixed on the fixed bar 45 and with down cut box mounting disc 31 through shear displacemant sensor stand 9 and contacts; Last shear box mounting disc 27 bottom outer surfaces evenly are provided with a plurality of sheets protruding (as shown in Figure 2), also are provided with a plurality of sheets protruding (as shown in Figure 3) on the bottom surface in the down cut box mounting disc 31.
Said vertical unit comprises symmetrically arranged two first straight line electric cylinders 13, adapter sleeve 16, connecting link 46, perpendicular displacement sensor 21 and top loading unit; Wherein, the top loading unit comprises pull pressure sensor 14, spherical hinge 15, the second straight line electric cylinder 17, crossbeam 19, balance stem 20, pressure at right angle distributing disc 23, transmission rod 24, increased pressure board 26; Wherein, said balance stem 20 two ends are fixed on two fixed bar 45 upper ends, said crossbeam 19 parallel balance stem 20 belows that are positioned at, and two fixed bars 45 pass said crossbeam 19 and crossbeam 19 can the 45 upper and lower slips of relative fixed bar; Two first straight line electric cylinders 13 are separately positioned on the outside of two fixed bars 45 through straight line electric cylinder bottom seat 7; The electronic cylinder axle of two first straight line electric cylinders 13 is fixed on the two ends of crossbeam 19 through connecting link 46 and setscrew nut 18, and the electronic cylinder axle of the first straight line electric cylinder 13 is connected with connecting link 46 through adapter sleeve 16; The second straight line electric cylinder 17 is fixed on the center of crossbeam 19 belows; Below the second straight line electric cylinder 17, connect said spherical hinge 15, pull pressure sensor 14 and pressure at right angle distributing disc 23 successively; Below pressure at right angle distributing disc 23,, connect down cut box mounting disc 27 through bolt at increased pressure board 26 lower surfaces through several (being generally 3) transmission rod 24 fixing said increased pressure boards 26; Said perpendicular displacement sensor 21 is fixed on the fixed bar 45 through perpendicular displacement sensor stand 22, and the lower end of perpendicular displacement sensor 21 contacts with the upper surface of pressure at right angle distributing disc 23.
The upper end of said axis 38 is passed the center of shearing gear wheel 32, down cut box mounting disc 31, down cut box 30, last shear box 29, upward shear box mounting disc 27, increased pressure board 26 successively, and the middle shaft-cup 25 that the upper end of this axis 26 is fixed on increased pressure board 26 centers covers.
Said clearance control servomotor 34, shear servomotor 42, two first straight line electric cylinders 13, the second straight line electric cylinder 17, intermittently sensor 33, shearing moment sensor 4 connect said controller 43 respectively.
Below be above-mentioned each parts roles in the present invention:
Sole plate 1 is used to keep the stability of whole instrument; Reducer casing 2 is used to provide the shear rate of different gears; Shearing moment sensor 4 is used to measure the shearing moment that is applied on the sample; Platform 6 is used to support cut cells, vertical unit; Straight line electric cylinder bottom seat 7 is used to install the second straight line electric cylinder 17; The shearing gear wheel 32 that shearing pinion wheel 8 is used to drive with its engagement rotates; Shear displacemant sensor stand 9 is used for fixing shear displacemant sensor 10; Shear displacemant sensor 10 is used to measure the shear displacemant amount of shear surface; Rubber ring 11 is used to reduce to go up the frictional resistance between shear box and the down cut box; Shearing resistance sensor 12 is used for measuring the frictional resistance at shear history shear surface place; The first straight line electric cylinder 13 is used to go up and down increased pressure board 26; Pull pressure sensor 14 is used to measure the second straight line electric cylinder 17 and is applied to the magnitude of load on the pressure distribution dish 26; Spherical hinge 15 is used to guarantee the axis centering of vertical load and instrument, the eccentric heeling moment that produces of the power that prevents; Adapter sleeve 16 is used to connect the electronic cylinder axle of the connecting link 46 and the first straight line electric cylinder 13; The sample that the second straight line electric cylinder 17 is used in shear box provides vertical load; Setscrew nut 18 is used to adjust the balance of the first straight line electric cylinder 17 of both sides; Crossbeam 19 is used for fixing and is connected the first straight line electric cylinder 17; The perpendicular displacement that perpendicular displacement sensor 21 is used to measure pressure at right angle distributing disc 23 is to calculate the vertical deformation of sample; Perpendicular displacement sensor stand 22 is used for fixing perpendicular displacement sensor 21; Pressure at right angle distributing disc 23 is used for pressure at right angle is distributed in each transmission rod 24; Transmission rod 24 is used for pressure at right angle is reached increased pressure board 26; Middle shaft-cup 25 is used to cover the upper end of axis; Increased pressure board 26 is used for applying pressure at right angle to sample; Last shear box mounting disc 27 is used for fixing shear box 27; Pore water pressure sensor 28 is used to measure the pore water pressure of sample; Last shear box 29, down cut box 30 all are used to place sample; Down cut box mounting disc 31 is used for fixing down cut box 30; Shear gear wheel 32 and be used under the drive of shearing pinion wheel 8, driving shear box 30 rotations; Gap sensor 33 is used to measure the clearance distance of shear box, down cut box; Clearance control servomotor 34 is used to control the gap length between shear box, down cut box; Clearance control servomotor base 35 is used for fixing clearance control servomotor 34; Gap adjustment bevel gear pair 37 is used for converting rotatablely moving of clearance control servomotor 34 into the leading screw axially-movable; Axis 38 is used under the drive of clearance control servomotor 34, regulating the gap of upper and lower shear box; Shear the moment of torsion that bevel gear pair 40 is used to transmit speed reduction unit 2 outputs; Shearing servomotor 42 is used to whole instrument provides power source and control loop rate of shear degree; Controller 43 is used for control gap control servomotor 34, shear rotating speed and two first straight line electric cylinders 13 of servomotor 42, the up-down displacement of the second straight line electric cylinder 17.
Principle of work of the present invention is following:
Electronic large high-speed strain control type ring shear apparatus of the present invention utilization is taken from on-the-spot disturbed sample and is experimentized.The experiment initial stage; Bolt between last shear box and the last shear box mounting disc is unfixing; The power supply of the straight line electric cylinder 13 of two symmetries is started working it about connection; This moment top load maintainer (comprising member 14,15,17,19,20,23,24,26) and go up shear box mounting disc 27 and promoted by integral body together, when rising to the extreme higher position and promptly reach the maximum lift displacement that controller 43 sets, about two straight line electric cylinders 13 quit work; This moment sample is packed into and go up in shear box 29 and the down cut box 30; Two straight line electric cylinders 13 reverse about treating to start once more after the sample filling is accomplished, and the top load maintainer begins to descend, and electronic cylinder 13 quits work when last shear box mounting disc 27 contacts with last shear box 29; And will go up shear box mounting disc 27 and fix with last shear box 29 usefulness bolts, can carry out the main body experiment then.
After the main body experiment formally begins; At first starting the second straight line electric cylinder 17 moves downward its lead screw shaft; The pressure at right angle that applies a certain size by requirement of experiment is given pull pressure sensor 14; Pull pressure sensor 14 is passed to pressure at right angle distributing disc 23 with pressure at right angle again, passes 24 to increased pressure board 26 by transmission rod again.Because it is protruding that last shear box mounting disc 27 bottoms evenly are provided with a lot of sheets; Under the effect that receives upper vertical pressure; These sheets are protruding to embed in the sample soil body; The friction force of shear box mounting disc 27 and sample on when applying pressure at right angle, having increased to sample, thus guaranteed that the sample in the last shear box keeps stable, does not rotate with sample in the down cut box.
After loading procedure was accomplished, the control that servomotor 42 is realized shear rate was sheared in controller 43 controls, realizes target torque by reducer casing 2, and in the shear history, the inner structure state of reducer casing 2 is as shown in Figure 4.
Moment of torsion by reducer casing 2 outputs passes to shearing pinion shaft 3 through shearing bevel gear pair 40, and the shearing moment sensor of installing on the top of shearing pinion shaft 34 is measured and is applied to the shearing moment on the sample.The rotation of shearing pinion shaft 3 has driven and has been installed in shearing pinion wheel 8 rotations of shearing on the pinion shaft 3; Rotate with the shearing gear wheel 32 of shearing pinion wheel 8 engagements thereupon; Down cut box mounting disc 31 is fixed on shears on the gear wheel 32, and down cut box mounting disc 31 is rotated simultaneously.Because it is protruding that a lot of sheets evenly are set on the bottom surface in the down cut box mounting disc 31; Under the effect that receives upper vertical pressure; These sheets are protruding to embed in the sample; The sample that makes down cut box mounting disc 31 when rotating, drive in the down cut box 30 rotates, and has finally realized the annular shear failure of sample.
Gap sensor 33 is gathered gap signal in real time and is sent controller 43 in experimentation; Whether controller 43 real-time judge gaps are in normal range; If it is undesired; Then the rotating speed of the servomotor 34 of control gap control in real time moves up and down thereby drive axis 38 through gap adjustment gear pair 37, and middle shaft-cup 26 is withstood in axis 38 upper ends; Thereby drive increased pressure board 26, last shear box mounting disc 27 and last shear box 29 integral body and do upper and lower motion, realize that the gap is to appropriate clearance between the upper and lower shear box of adjustment.
Shearing moment sensor 4 is gathered the moment of torsion of reducer casing 2 outputs in real time in experimentation; And signal passed to controller 43; Controller 43 is regulated the rotating speed of shearing servomotor 42 according to the required shear rate of experiment; If moment of torsion or rotating speed can not be satisfied the demand, can realize through reducer casing 2 gearshifts.
Shear displacemant sensor 10, shearing resistance sensor 12, pull pressure sensor 14, perpendicular displacement sensor 21 and pore water pressure sensor 28 all are measuring units, are used to gather experimental signal, do not participate in regulating and control.

Claims (10)

1. an electronic large-scale strain control type ring shear apparatus is characterized in that, comprises sole plate (1) and platform (6); Said platform (6) is installed in said sole plate (1) top through support bar (44); Between platform (6) and sole plate (1), be provided with controller (43), shear pinion wheel control module and shear box gap control unit; Cut cells and vertical unit are installed on platform (6);
Said shearing pinion wheel control module comprises reducer casing (2), shearing pinion shaft (3), shearing moment sensor (4), shears pinion shaft front end block bearing (5), shears pinion shaft end bearing bearing (39), shears bevel gear pair (40) and shear servomotor (42); Wherein, Shearing servomotor (42) is fixed on the said sole plate (1); The output terminal of shearing servomotor (42) connects reducer casing (2); The output terminal of reducer casing (2) connects a gear shearing bevel gear pair (40), and another gear of shearing bevel gear pair (40) is installed on the sole plate (1) through shearing pinion shaft end bearing bearing (39); Shear the top of bevel gear pair (40) shearing pinion shaft (3) and shearing moment sensor (4) are installed successively; Wherein, the bearing of shearing moment sensor (4) upper end is upward through platform (6) and is connected with shearing pinion shaft front end block bearing (5);
Said shear box gap control unit comprises gap sensor (33), clearance control servomotor (34), gap adjustment bevel gear pair (37) and axis (38); Wherein, Axis (38) passes platform (6), and the lower end of axis (38) is installed intermittently sensor (33), gap adjustment bevel gear pair (37) successively; Clearance control servomotor (34) also is installed on the sole plate (1), and the output terminal of this clearance control servomotor (34) is connected with gap adjustment bevel gear pair (37);
Said cut cells comprises shear box (29), down cut box (30), upward shear box mounting disc (27), down cut box mounting disc (31), shears gear wheel (32), shears pinion wheel (8); Wherein, Shear gear wheel (32) and be positioned at platform (6) central authorities; Shear the platform (6) of gear wheel (32) both sides and go up symmetry installation two fixed bars (45); Down cut box mounting disc (31) is fixed on shears on the gear wheel (32), the top coaxial successively installation down cut box (30) of down cut box mounting disc (31), upward shear box (29) and last shear box mounting disc (27); Wherein, be connected through bolt between down cut box mounting disc (31) and the down cut box (30), also be connected between last shear box (29) and the last shear box mounting disc (27) through bolt; Shear pinion wheel (8) and be installed on the shearing pinion shaft front end block bearing (5), and shear pinion wheel (8) and shear gear wheel (32) engagement;
Said vertical unit comprises symmetrically arranged two first straight line electric cylinders (13), adapter sleeve (16), connecting link (46), top loading unit; Wherein, the top loading unit comprises pull pressure sensor (14), spherical hinge (15), the second straight line electric cylinder (17), crossbeam (19), balance stem (20), pressure at right angle distributing disc (23), transmission rod (24), increased pressure board (26); Wherein, balance stem (20) two ends are fixed on said two fixed bars (45) upper ends, parallel balance stem (20) below that is positioned at of crossbeam (19), and two fixed bars (45) pass crossbeam (19) and this crossbeam (19) can the upper and lower slip of relative fixed bar (45); Described two first straight line electric cylinders (13) are separately positioned on the outside of described two fixed bars (45) through straight line electric cylinder bottom seat (7), and the electronic cylinder axle of said two first straight line electric cylinders (13) is fixed on the two ends of crossbeam (19) through connecting link (46) and setscrew nut (18); The electronic cylinder axle of the first straight line electric cylinder (13) is connected with connecting link (46) through adapter sleeve (16); The second straight line electric cylinder (17) is fixed on the center of said crossbeam (19) below; Connect spherical hinge (15), pull pressure sensor (14) and pressure at right angle distributing disc (23) successively in the below of the second straight line electric cylinder (17); In the below of pressure at right angle distributing disc (23) through the fixing increased pressure board (26) of several transmission rods (24), at the lower surface of increased pressure board (26) through bolt connection down cut box mounting disc (27);
The upper end of said axis (38) is passed the center of shearing gear wheel (32), down cut box mounting disc (31), down cut box (30), last shear box (29), last shear box mounting disc (27) and increased pressure board (26) successively, and the middle shaft-cup (25) that the upper end of this axis (26) is fixed on increased pressure board (26) center covers;
Said clearance control servomotor (34), shear servomotor (42), two the first straight line electric cylinders (13), the second straight line electric cylinders (17), intermittently sensor (33), shearing moment sensor (4) connect controller (43) respectively.
2. electronic large-scale strain control type ring shear apparatus as claimed in claim 1 is characterized in that, said shearing servomotor (42) is fixed on the said sole plate (1) through shearing servomotor base (41).
3. electronic large-scale strain control type ring shear apparatus as claimed in claim 1; It is characterized in that; Support (36) is installed on the said sole plate (1); Said controller (43) is fixed on the said support (36), and said clearance control servomotor (34) is fixed on the support (36) through clearance control servomotor base (35).
4. electronic large-scale strain control type ring shear apparatus as claimed in claim 1; It is characterized in that; Said shear box mounting disc (27) bottom outer surface of going up evenly is provided with a plurality of sheets convexities, and it is protruding also to be provided with a plurality of sheets on the bottom surface in the down cut box mounting disc (31).
5. electronic large-scale strain control type ring shear apparatus as claimed in claim 1 is characterized in that, said down cut box (30) and said going up between the shear box (29) are provided with rubber ring (11).
6. electronic large-scale strain control type ring shear apparatus as claimed in claim 1 is characterized in that, the below of said pressure at right angle distributing disc (23) is through the fixing said increased pressure board (26) of (3) individual transmission rod (24).
7. electronic large-scale strain control type ring shear apparatus as claimed in claim 1 is characterized in that said ring shear apparatus also comprises pore water pressure sensor (28), and said pore water pressure sensor (28) is installed in said going up in the hole that is provided with on shear box (29) sidewall.
8. electronic large-scale strain control type ring shear apparatus as claimed in claim 1; It is characterized in that; Said ring shear apparatus also comprises perpendicular displacement sensor (21); Said perpendicular displacement sensor (21) is fixed on the fixed bar (45) through perpendicular displacement sensor stand (22), and the lower end of perpendicular displacement sensor (21) contacts with the upper surface of said pressure at right angle distributing disc (23).
9. electronic large-scale strain control type ring shear apparatus as claimed in claim 1; It is characterized in that; Said ring shear apparatus also comprises shear displacemant sensor (10), and said shear displacemant sensor (10) is fixed on said fixed bar (45) through shear displacemant sensor stand (9) and upward and with said down cut box mounting disc (31) contacts.
10. electronic large-scale strain control type ring shear apparatus as claimed in claim 1; It is characterized in that; Said ring shear apparatus also comprises shearing resistance sensor (12), and said shearing resistance sensor (12) is installed in said fixed bar (45) and upward and with said upward shear box mounting disc (27) contacts.
CN 201110402013 2011-12-07 2011-12-07 Electrical large strain control type ring shearing apparatus Expired - Fee Related CN102680328B (en)

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CN103278400A (en) * 2013-04-24 2013-09-04 中国科学院力学研究所 In-situ ring shearing test apparatus for soil
CN103308398A (en) * 2013-06-07 2013-09-18 东北石油大学 Annular cutting device
CN104007026A (en) * 2014-05-21 2014-08-27 广州市市政工程设计研究院 Constant shearing surface direct shearing apparatus
CN104897484A (en) * 2015-05-25 2015-09-09 山西省交通科学研究院 Torsional shear test system and method for geosynthetics
CN105067453A (en) * 2015-07-08 2015-11-18 浙江土工仪器制造有限公司 Ring shear apparatus for circular-ring-shaped soil sample
CN105203407A (en) * 2015-09-11 2015-12-30 山西省交通科学研究院 Test device and test method of residual strength of soil sample
CN105758738A (en) * 2016-04-22 2016-07-13 西安石油大学 Electric double-surface shear apparatus
CN106018126A (en) * 2016-05-24 2016-10-12 西安长庆科技工程有限责任公司 Soil mass dry-wet circulating annular shearing instrument capable of measuring humidity
CN106092756A (en) * 2016-06-07 2016-11-09 中国科学院武汉岩土力学研究所 A kind of hollow ring shear apparatus applying confined pressure
CN106168620A (en) * 2016-09-28 2016-11-30 中国科学院武汉岩土力学研究所 A kind of rock tension and compression ring cuts seepage tests instrument
CN108732057A (en) * 2018-06-04 2018-11-02 重庆交通大学 Ring shear test equipment and its test method under a kind of soil body Frozen-thawed cycled and weathering environment
CN108801804A (en) * 2018-03-21 2018-11-13 中国地质大学(武汉) A kind of vertical shearing face ring scissor test instrument applying confining pressure

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CN102252917A (en) * 2011-06-08 2011-11-23 大连理工大学 Midsize direct shear apparatus with non-lever type loading
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JPH10206306A (en) * 1997-01-23 1998-08-07 Fujita Corp Shearing testing device and method for ground material
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103278400A (en) * 2013-04-24 2013-09-04 中国科学院力学研究所 In-situ ring shearing test apparatus for soil
CN103278400B (en) * 2013-04-24 2015-09-16 中国科学院力学研究所 Soil in-situ ring cuts experiment instrument
CN103308398A (en) * 2013-06-07 2013-09-18 东北石油大学 Annular cutting device
CN103308398B (en) * 2013-06-07 2014-05-21 东北石油大学 Annular cutting device
CN104007026B (en) * 2014-05-21 2016-04-27 广州市市政工程设计研究总院 A kind of constant shear face direct shear apparatus
CN104007026A (en) * 2014-05-21 2014-08-27 广州市市政工程设计研究院 Constant shearing surface direct shearing apparatus
CN104897484A (en) * 2015-05-25 2015-09-09 山西省交通科学研究院 Torsional shear test system and method for geosynthetics
CN104897484B (en) * 2015-05-25 2017-11-10 山西省交通科学研究院 A kind of geosynthetics torsion shear test system and method
CN105067453A (en) * 2015-07-08 2015-11-18 浙江土工仪器制造有限公司 Ring shear apparatus for circular-ring-shaped soil sample
CN105203407A (en) * 2015-09-11 2015-12-30 山西省交通科学研究院 Test device and test method of residual strength of soil sample
CN105758738A (en) * 2016-04-22 2016-07-13 西安石油大学 Electric double-surface shear apparatus
CN106018126A (en) * 2016-05-24 2016-10-12 西安长庆科技工程有限责任公司 Soil mass dry-wet circulating annular shearing instrument capable of measuring humidity
CN106018126B (en) * 2016-05-24 2018-11-13 西安长庆科技工程有限责任公司 A kind of measurable soil body drying and watering cycle ring shear apparatus of humidity
CN106092756A (en) * 2016-06-07 2016-11-09 中国科学院武汉岩土力学研究所 A kind of hollow ring shear apparatus applying confined pressure
CN106092756B (en) * 2016-06-07 2018-11-09 中国科学院武汉岩土力学研究所 A kind of hollow ring shear apparatus applying confining pressure
CN106168620A (en) * 2016-09-28 2016-11-30 中国科学院武汉岩土力学研究所 A kind of rock tension and compression ring cuts seepage tests instrument
CN108801804A (en) * 2018-03-21 2018-11-13 中国地质大学(武汉) A kind of vertical shearing face ring scissor test instrument applying confining pressure
CN108732057A (en) * 2018-06-04 2018-11-02 重庆交通大学 Ring shear test equipment and its test method under a kind of soil body Frozen-thawed cycled and weathering environment

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