CN207051095U - Automatic centering load maintainer under a kind of triaxial stress - Google Patents
Automatic centering load maintainer under a kind of triaxial stress Download PDFInfo
- Publication number
- CN207051095U CN207051095U CN201720891205.2U CN201720891205U CN207051095U CN 207051095 U CN207051095 U CN 207051095U CN 201720891205 U CN201720891205 U CN 201720891205U CN 207051095 U CN207051095 U CN 207051095U
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- loading system
- supporting plate
- pressure head
- sample
- steel ball
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004816 latex Substances 0.000 description 5
- 229920000126 latex Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses automatic centering load maintainer under a kind of triaxial stress, load maintainer includes base, is separately installed with base for the X that three axle pressures are carried out for sample to loading system, Y-direction loading system and Z-direction loading system；X includes horizontally disposed and the arrangement that is square four pull bars to loading system and Y-direction loading system, the both ends of every pull bar are respectively fixedly connected with the supporting plate and reverse supporting plate being vertically arranged, electro-hydraulic servo actuator for providing power is installed, the output end of electro-hydraulic servo actuator is provided with steel ball structure pressure head through supporting plate on the outside of supporting plate；Steel ball structure pressure head is connected with by support bar on the inside of reverse supporting plate；True rock stressing conditions are simulated by three-dimensional loading system, and X can be realized according to the displacement of sample in the course of the work to loading system and Y-direction loading system automatic centering, side force caused by reduction, lift the precision of style.
Description
【Technical field】
The utility model belongs to automatic centering under technical field of experiment equipment, more particularly to a kind of triaxial stress and loads machine
Structure.
【Background technology】
Rock cranny is the important rock mass structure for influenceing high dam stability of foundation, and crack is in stress field and hydraulic pressure force coupling action
Seepage characteristic under is the important indicator of dam foundation stability evaluation.It is limited to test method and the condition of testing equipment, current crack
Seepage characteristic is converted to comprehensive infiltration coefficient by indexs such as fractured zones density, apertures by statistical method, and traditional is vertical
The maximum overlying burden that permeameter can be born is small, only can reach 10MPa, it is impossible to bear the load of high intensity, its non-true triaxial by
Power, head pressure are small, cause the accuracy of measurement low, and are also measured at present without suitable appliance arrangement.
【Utility model content】
The purpose of this utility model is to provide automatic centering load maintainer under a kind of triaxial stress, to solve existing equipment lotus
Carry small, non-true triaxial stress, be also easy to produce the problem of side force.
The utility model uses following technical scheme：Automatic centering load maintainer under a kind of triaxial stress, load maintainer bag
Base is included, is separately installed with base and adds for carrying out the X of three axle pressures for sample to loading system, Y-direction loading system and Z-direction
Loading system；
X includes horizontally disposed and the arrangement that is square four pull bars, every pull bar to loading system and Y-direction loading system
Both ends be respectively fixedly connected with the supporting plate and reverse supporting plate being vertically arranged, be provided with the outside of supporting plate for providing power
Electro-hydraulic servo actuator, the output end of electro-hydraulic servo actuator is provided with steel ball structure pressure head through supporting plate；Reversely support
Steel ball structure pressure head is connected with by support bar on the inside of plate；The position correspondence of two steel ball structure pressure heads, size is identical, and two
Steel ball structure pressure head is used to apply load to sample.
Further, the two bottom sides of each supporting plate and reverse supporting plate are connected on line slideway by sliding block,
Sliding block is used to drive supporting plate and reverse supporting plate to slide along line slideway, with adjust X to loading system or Y-direction loading system with
The relative position of sample.
Further, steel ball structure pressure head includes the rebound, clamping plate, the pressure head body that are sequentially connected, pressure head body and clamping plate it
Between connected by connecting plate, be fixedly connected between rebound and clamping plate by screw；
Be further opened with multiple through holes on clamping plate, each through hole close to one end of pressure head body with tapered, in each through hole
Steel ball is mounted on, each steel ball is used to rotate in through-holes, so that pressure head body and connecting plate are with compression sample synchronizing moving；
Each connecting plate and clamping plate junction are provided with jackscrew screw and for being oriented to for pressure head body and spacing bearing；
Cushion pad is provided with the end face of pressure head body and sample contacts；Cushion pad is arranged on the edge of pressure head body and sample contacts end face
Place.
Further, Z-direction loading system includes force section and reverse force section, four root posts that force section is vertically arranged,
Upper end per root post is fixedly connected with horizontally disposed supporting plate, is provided with the top of supporting plate for providing power
Electro-hydraulic servo actuator, the output end of electro-hydraulic servo actuator are provided with ball indenter through supporting plate；
Reverse force section includes four support bars being arranged on base, and is connected at the top of every support bar same
Push-down head；The position correspondence of upper ball indenter and push-down head, size is identical, and is used to apply load to sample.
Further, X is mounted on load sensor, deformation to loading system, Y-direction loading system and Z-direction loading system
Sensor, high accuracy displacement sensor, electrohydraulic servo valve.
The beneficial effects of the utility model are：The utility model proposes crack Penetration Signature under the conditions of research stress variation
The experimental rig of response, various environmental stress field conditions of the Dam Foundation Rock crack in reservoir filling running can be simulated,
Carry out Experimental Study on Seepage Characteristics research, true rock stressing conditions are simulated by three-dimensional loading system, and in the course of the work can root
Realize that X to loading system and Y-direction loading system automatic centering, side force caused by reduction, lifts style according to the displacement of sample
Precision.
【Brief description of the drawings】
Fig. 1 is the structural representation of automatic centering load maintainer under a kind of triaxial stress of the utility model；
Fig. 2 is the structural representation of steel ball structure pressure head in the utility model.
Wherein：101. base；102.X is to loading system；103.Y is to loading system, and 104.Z is to loading system；105. draw
Bar；106. supporting plate；107. reverse supporting plate；108. line slideway；109. electro-hydraulic servo actuator；110. load sensor；
111. steel ball structure pressure head；112. deformation-sensor；113. high accuracy displacement sensor；114. electrohydraulic servo valve；117. column；
Ball indenter on 119.；602. connecting plate；603. steel ball；604. clamping plate；605. cushion pad；606. pressure head bodies；607. rebound；
608. jackscrew screws；609. bearing.
【Embodiment】
The utility model is described in detail with reference to the accompanying drawings and detailed description.
The utility model discloses automatic centering load maintainer under a kind of triaxial stress, as shown in Figure 1 and Figure 2, including base
101, it is separately installed with base 101 for carrying out the X of three axle pressures for sample to loading system 102, Y-direction loading system 103
With Z-direction loading system 104, X is horizontally disposed to loading system 102 and Y-direction loading system 103, and Z-direction loading system 104 is vertical
Set, and X is vertically intersected on same intersection point two-by-two to loading system 102, Y-direction loading system 103, Z-direction loading system 104, hands over
It is used to place sample to be tested at point, three sets of loading systems use electro-hydraulic servo control, independent loads, and load control is accurate, can
Realize the experiment condition of stress-seepage coupling.
X includes horizontally disposed and the arrangement that is square four pull bars to loading system 102 and Y-direction loading system 103
105, four pull bars 105 are parallel to each other, and the both ends of every pull bar 105 are respectively fixedly connected with the supporting plate 106 being vertically arranged
With reverse supporting plate 107, supporting plate 106 is provided with the end face away from reverse supporting plate 107 and watched for providing the electro-hydraulic of power
Actuator 109 is taken, i.e. the outside of supporting plate 106 is provided with the electro-hydraulic servo actuator 109 for providing power.It is new in this practicality
The inner side and outer side being previously mentioned in type refers to：Position close to sample is inner side, and the position away from sample is outside.It is electro-hydraulic to watch
The output end for taking actuator 109 is provided with steel ball structure pressure head 111 through supporting plate 106, is also equipped with load sensor 110.
The reverse inner side of supporting plate 107 is connected with steel ball structure pressure head 111, two steel ball structure pressure heads 111 by support bar
Position correspondence, size is identical, and two steel ball structure pressure heads 111 be used to sample apply load.
Steel ball structure pressure head 111 includes being sequentially connected rebound 607, clamping plate 604, pressure head body 606 from outside to inner side, presses
Connected by connecting plate 602 between head body 606 and clamping plate 604, be fixedly connected between rebound 607 and clamping plate 604 by screw.
Rebound 607, in order to adapt to the shape of sample, rebound 607 is traditionally arranged to be square plate.
Two relative sides of the in the vertical direction of rebound 607 be respectively connecting to electro-hydraulic servo actuator output end and
The outside connection electro-hydraulic servo actuator of clamping plate 604, i.e. rebound 607, inner side connecting cleat 604.Two relatively of clamping plate 604
Side is connected with the pressure head body 606 for applying load to sample by connecting plate 602, i.e., on the vertical direction of clamping plate 604
It is connected on two opposite flanks by connecting plate 602 with pressure head body, rebound 607 serves the transmission effect of power.
It can be applied force directly to by pressure head body 606 on sample, sample is pressed.The shape of clamping plate 604 and rebound
607 is similar, it is possible to achieve keeps the effect such as uniform force, attractive in appearance.Multiple through holes are offered on clamping plate 604, each through hole is close
One end of pressure head body 606 can block steel ball 603 with tapered, ensure that steel ball 603 will not slip.
Steel ball 603 is mounted in each through hole, each steel ball 603 is used to rotate in through-holes and pressure-bearing, so that pressure
Head body 606 and connecting plate 602 are with compression sample synchronizing moving.The both ends of each steel ball 603 contact rebound 607, pressure head respectively
Body 606, when sample is pressurized, it is possible to cause sample center to move up and down, then in order to avoid sample is influenceed by side force
Test effect, set steel ball 603 that pressure head body 606 and connecting plate 602 can be made synchronously to be moved up and down with sample, after drive
Clamping plate 604, rebound 607, the electro-hydraulic servo actuator etc. of side, sample can be thus kept not lifted by side force
Test effect.
The quantity of steel ball 603 is calculated according to the maximum endurance of complete machine, is according to maximum endurance in the utility model
1000kN is calculated, it can be deduced that is provided with 81 steel balls altogether on clamping plate 604.
The junction of each connecting plate 602 and clamping plate 604 is provided with the jackscrew screw 608 for fixed connecting plate 602,
Jackscrew screw 608 plays a part of placement pressure head body 606 and dropped, but has no effect on pressure head body 606 and connecting plate 602 relative to folder
Plate 604 moves up and down.
Each connecting plate 602 and the junction of clamping plate 604 are provided with for being oriented to for pressure head body 606 and spacing bearing
609, pressure head body 606 and connecting plate 602 is not deviated by longitudinal centre line during movement by bearing 609, to ensure
The pressure degree of accuracy during experiment, is not in side force.
Be provided with cushion pad 605 on the end face of pressure head body 606 and sample contacts, cushion pad 605 be arranged on pressure head body 606 with
The edge of sample contacts end face.Cushion pad 605 can effectively slow down impulsive force of the pressure head body 606 to sample.Due to measuring
When, sample outer surface is enclosed with latex film, and it is larger that the edge of latex film bears pressure, is easily formed damaged, causes to permeate water
Spill, do not reach expected test effect.Thus, if using hard material pressure head body 606, easily latex film is caused to damage
Wound, therefore, can mitigate the damage to latex film using cushion pad 605, avoid the occurrence of the situation generation for exposing infiltration water, lifting
Test effect.
The two bottom sides of supporting plate 106 and reverse supporting plate 107 are connected on line slideway 108 by sliding block, sliding block
For driving supporting plate 106 and reverse supporting plate 107 to be slided along line slideway 108, to adjust X to loading system 102 and sample
Relative position, realize both direction automatic centering.Because X is to the steel ball structure pressure head 111 of loading system and Y-direction loading system
And sample contacts, so, the cushion pad of nitrile rubber material is installed in the end of each steel ball structure pressure head 111, can be with
Sealing function is played, the corner of latex film can also be protected not to be damaged, avoid seepage water from spilling.
The junction of each steel ball structure pressure head 111 and electro-hydraulic servo actuator 109, each steel ball structure pressure head 111 with
The equal in the vertical direction in junction of support bar is provided with multiple steel balls, and so, horizontal steel ball structure pressure head 111 is in free shape
State, can be when upper push-down head pressurizes to sample, and the steel ball structure pressure head 111 of horizontal direction follows moving up and down for sample and moved
It is dynamic, it is ensured that pressure head moves down after stress, and loading system will not be by side force.
Z-direction loading system 104 includes force section and reverse force section.Force section includes four root posts 117 being vertically arranged,
Upper end per root post 117 is fixedly connected with horizontally disposed supporting plate 106, and the top of supporting plate 106, which is provided with, to be used for
The electro-hydraulic servo actuator 109 of power is provided, the output end of electro-hydraulic servo actuator 109 is provided with steel through supporting plate 106
Ball pressure head 119；
Reverse force section includes four support bars being arranged on base 101, is connected at the top of every support bar same
One push-down head.Upper ball indenter 119 and push-down head are conventional pressure head of the prior art, and position correspondence, and size is identical, and
It is used to apply sample load, and upper steel ball structure pressure head 119 is connected with infiltration water pressurized cylinder, to permeate water pressurized cylinder
High-pressure osmosis water, and the pressure adjustable of delivery port are provided for it, pressure variable speed pressurization can be achieved.
X is mounted on load sensor 110 to loading system 102, Y-direction loading system 103 and Z-direction loading system 104, become
Shape sensor 112, high accuracy displacement sensor 113, electrohydraulic servo valve 114.
The utility model distinguishing feature different from normal vertical permeameter be：Maximum 0~100MPa of overlying burden, data
Collection is accurate, and control model automaticity is high.
It is of the present utility model to be using process：Sample to be tested is placed on lower steel ball structure pressure head, and by X to loading
The steel ball structure pressure head 111 being connected in system 102 and Y-direction loading system 103 with reverse supporting plate 107 props up sample to be tested, opens
Dynamic electro-hydraulic servo actuator 109, makes X be connected into loading system 102 and Y-direction loading system 103 with electro-hydraulic servo actuator 109
Steel ball structure pressure head 111 gradually prop up sample to be tested, when the steel ball structure pressure head 111 around sample to be tested approaches, if after
Continuous electro-hydraulic servo actuator 109 continues to exert a force, and sample to be tested can carry out the movement of small range with the size of force, and X is to loading
System 102 and Y-direction loading system 103 also can move small range with sample along horizontal guide rail 108 and move, until sample to be tested reaches
During to stress balance, then X realizes to loading system 102 and Y-direction loading system 103 by being automatically moved on line slideway 108
Automatic centering, true triaxial stress, will not produce side force.
Claims (5)
1. automatic centering load maintainer under a kind of triaxial stress, it is characterised in that the load maintainer includes base (101), institute
State and be separately installed with base (101) for the X that three axle pressures are carried out for sample to loading system (102), Y-direction loading system
And Z-direction loading system (104) (103)；
The X includes horizontally disposed and the arrangement that is square four drawings to loading system (102) and Y-direction loading system (103)
Bar (105), the both ends of the every pull bar (105) are respectively fixedly connected with the supporting plate (106) being vertically arranged and reversely support
Plate (107), is provided with the electro-hydraulic servo actuator (109) for providing power on the outside of the supporting plate (106), described electro-hydraulic to watch
The output end for taking actuator (109) is provided with steel ball structure pressure head (111) through the supporting plate (106)；The reversely support
Steel ball structure pressure head (111) is connected with by support bar on the inside of plate (107)；The position of two steel ball structure pressure heads (111)
Corresponding, size is identical, and two steel ball structure pressure heads (111) are used to apply load to sample.
2. automatic centering load maintainer under triaxial stress as claimed in claim 1, it is characterised in that each supporting plate
(106) it is connected to the two bottom sides of reverse supporting plate (107) by sliding block on line slideway (108), the sliding block is used for
The supporting plate (106) and reverse supporting plate (107) is driven to be slided along line slideway (108), to adjust the X to loading system
(102) or Y-direction loading system (103) and sample relative position.
3. automatic centering load maintainer under triaxial stress as claimed in claim 2, it is characterised in that the steel ball structure pressure head
(111) rebound (607), clamping plate (604), the pressure head body (606) being sequentially connected, the pressure head body (606) and clamping plate are included
(604) connected between by connecting plate (602), fixed and connected by screw between the rebound (607) and the clamping plate (604)
Connect；
Multiple through holes are further opened with the clamping plate (604), each through hole is close to one end of pressure head body (606) with cone
Degree, steel ball (603) each being mounted in the through hole, each steel ball (603) is used to rotate in the through hole, with
Make the pressure head body (606) and connecting plate (602) with compression sample synchronizing moving；
Each connecting plate (602) and the clamping plate (604) junction are provided with jackscrew screw (608) and for be described
Pressure head body (606) is oriented to and spacing bearing (609)；The pressure head body (606) on the end face of sample contacts with being provided with buffering
Pad (605)；The cushion pad (605) is arranged on the edge of the pressure head body (606) and sample contacts end face.
4. automatic centering load maintainer under the triaxial stress as described in claim 1-3 is any, it is characterised in that the Z-direction adds
Loading system (104) includes force section and reverse force section, four root posts (117) that the force section is vertically arranged, described in every
The upper end of column (117) is fixedly connected with horizontally disposed supporting plate (106), is installed at the top of the supporting plate (106)
Have for providing the electro-hydraulic servo actuator of power (109), the output end of the electro-hydraulic servo actuator (109) passes through the branch
Fagging (106) is provided with ball indenter (119)；
The reversely force section includes four support bars being arranged on the base (101), and the top of the every support bar
Portion is connected to same push-down head；The upper ball indenter (119) and the position correspondence of the push-down head, size is identical, and
For applying load to sample.
5. automatic centering load maintainer under the triaxial stress as described in claim 1-3 is any, it is characterised in that the X is to adding
Loading system (102), Y-direction loading system (103) and Z-direction loading system (104) are mounted on load sensor (110), deformation passes
Sensor (112), high accuracy displacement sensor (113), electrohydraulic servo valve (114).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720891205.2U CN207051095U (en) | 2017-07-21 | 2017-07-21 | Automatic centering load maintainer under a kind of triaxial stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720891205.2U CN207051095U (en) | 2017-07-21 | 2017-07-21 | Automatic centering load maintainer under a kind of triaxial stress |
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| Publication Number | Publication Date |
|---|---|
| CN207051095U true CN207051095U (en) | 2018-02-27 |
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ID=61497853
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|---|---|---|---|
| CN201720891205.2U Expired - Fee Related CN207051095U (en) | 2017-07-21 | 2017-07-21 | Automatic centering load maintainer under a kind of triaxial stress |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645562A (en) * | 2018-05-09 | 2018-10-12 | 西北工业大学 | The three axis Hopkinson bar synchronous dynamic caliberating devices and method of three-dimensional impact force snesor |
| CN109406310A (en) * | 2018-12-26 | 2019-03-01 | 深圳大学 | The Dynamic And Static Loads synchronous servo control system of three axis six-way Hopkinson pressure bars |
| CN110082210A (en) * | 2019-05-22 | 2019-08-02 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of pressure loading device |
| CN113447361A (en) * | 2021-07-19 | 2021-09-28 | 中国科学院地质与地球物理研究所 | Variable angle loading testing machine |
| CN113514331A (en) * | 2021-06-08 | 2021-10-19 | 浙江大学 | Large-load double-shaft compression loading device |
| CN113533021A (en) * | 2021-06-28 | 2021-10-22 | 王志 | Vertical loading device for overall static performance of horizontal lifeline device |
| WO2022166108A1 (en) * | 2021-02-05 | 2022-08-11 | 济南恒瑞金试验机有限公司 | Test system for testing performance during medical rehabilitation of injury to bone, tendon, and ligament in rats and mice |
| CN116786743B (en) * | 2023-08-24 | 2023-10-31 | 山西天宝集团有限公司 | Device and method for intelligent centering flange of new energy wind power generation press |
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2017
- 2017-07-21 CN CN201720891205.2U patent/CN207051095U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645562A (en) * | 2018-05-09 | 2018-10-12 | 西北工业大学 | The three axis Hopkinson bar synchronous dynamic caliberating devices and method of three-dimensional impact force snesor |
| CN109406310A (en) * | 2018-12-26 | 2019-03-01 | 深圳大学 | The Dynamic And Static Loads synchronous servo control system of three axis six-way Hopkinson pressure bars |
| CN110082210A (en) * | 2019-05-22 | 2019-08-02 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of pressure loading device |
| WO2022166108A1 (en) * | 2021-02-05 | 2022-08-11 | 济南恒瑞金试验机有限公司 | Test system for testing performance during medical rehabilitation of injury to bone, tendon, and ligament in rats and mice |
| CN113514331A (en) * | 2021-06-08 | 2021-10-19 | 浙江大学 | Large-load double-shaft compression loading device |
| CN113533021A (en) * | 2021-06-28 | 2021-10-22 | 王志 | Vertical loading device for overall static performance of horizontal lifeline device |
| CN113533021B (en) * | 2021-06-28 | 2024-06-04 | 王志 | Vertical loading device for overall static performance of horizontal lifeline device |
| CN113447361A (en) * | 2021-07-19 | 2021-09-28 | 中国科学院地质与地球物理研究所 | Variable angle loading testing machine |
| US11287356B1 (en) | 2021-07-19 | 2022-03-29 | Institute Of Geology And Geophysics | Variable angle loading testing machine |
| CN116786743B (en) * | 2023-08-24 | 2023-10-31 | 山西天宝集团有限公司 | Device and method for intelligent centering flange of new energy wind power generation press |
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