CN106018104B - A kind of stress loading device - Google Patents
A kind of stress loading device Download PDFInfo
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- CN106018104B CN106018104B CN201610326236.3A CN201610326236A CN106018104B CN 106018104 B CN106018104 B CN 106018104B CN 201610326236 A CN201610326236 A CN 201610326236A CN 106018104 B CN106018104 B CN 106018104B
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- lid
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of stress loading devices, it includes load chamber, hydraulic control system and Hydraulic servo system, load chamber is arranged on a pedestal, load chamber includes axial horizontal rear load lid, annular loading frame and preceding counter-force lid, bottom side in annular loading frame is provided with the horizontal specimen stage for bearing model, a left side in annular loading frame, it is right, upside corresponds to a left side for model, it is right, upper surface is provided with stress loading component, the rear surface of the corresponding model of load cover rim axial direction is provided with stress loading component after described, the front surface that the preceding counter-force cover rim axially corresponds to model is provided with preceding reaction plate.It is provided with oil circuit on the wall of annular loading frame and is tightly connected mouth and lead-in wire sealing connector.The axial direction of pedestal upper edge load chamber is provided with two closed slides, and annular loading frame is connect with rear load lid, preceding counter-force lid detachable-type sealed.The present invention sealing structure can reach large scale, heavily stressed stress loading device seal request.
Description
Technical field
The present invention relates to geomechanical model test loading equipemtn, specifically a kind of answering for the experiment of coal petrography engineering simulation
Force loading device.
Background technology
Model loading system is a key technology in geomechanical model test, because it is directly related to simulation effect
And precision, also directly affect formed stress in dummy block（Strain）The similarity degree of field.Can model test result be accorded with
Engineering actual forced status is closed to play a crucial role.
In existing model loading technique, it is common to use have the following two kinds load mode：First, being loaded using true triaxial
System loads model, the high crustal stress genuine three-dimensional load model trial system as disclosed in 101285808 B of CN；Second is that with
Flexible rubber capsule loads model, the high-ground stress flexibility load moment unloading test dress as disclosed in 203414356 U of CN
It sets.In the case where experimental precision is of less demanding, both modes can solve the problems, such as.With the continuous development of engineering,
Seek to develop the common trend for having become geotechnical engineering construction and exploitation in world wide to deep space, but by deep highland
The stability study of stress, High-geotemperature and the influence of rock mass complexity, Deep Underground Space and works has become current important
One of Environment Science project, therefore using more complicated under high-ground stress and high gas pressure synergy than the model of ruler greatly
Stress loading device can be the trend of later model loading system, but this is also to sealing system that more stringent requirements are proposed, need
It is proposed one just for complex stress loading device mating sealing system, with to high-ground stress and high gas pressure joint make
Help is provided with the research and development of lower complex stress loading device.
Invention content
The purpose of the present invention is to provide a kind of stress loading devices, can reach large scale, heavily stressed stress adds
Carry the seal request set.
Technical scheme is as follows：
A kind of stress loading device comprising load chamber, hydraulic control system and Hydraulic servo system, the load chamber setting exist
On one pedestal, the load chamber includes axial horizontal rear load lid, annular loading frame and preceding counter-force lid, the annular load
Bottom side in frame is provided with the horizontal specimen stage for bearing model, the left and right, upside in annular loading frame correspond to model a left side,
Right, upper surface is provided with stress loading component, and the rear surface that the corresponding model of cover rim axial direction is loaded after described is provided with stress loading
Component, the front surface that the preceding counter-force cover rim axially corresponds to model are provided with preceding reaction plate.It is arranged on the wall of annular loading frame
There is oil circuit to be tightly connected mouth and lead-in wire sealing connector, stress loading component is tightly connected mouth by oil circuit and connects with Hydraulic servo system
It connects, the oil pressure that the displacement sensor and stress loading component internal pressure that measure stress loading component displacement are provided in load chamber passes
Sensor；Sealing flange, the rounded boss of central part of sealing flange, the circumference of sealing flange are provided at lead-in wire sealing connector
The wall of portion and annular loading frame is bolted, and the boss of sealing flange is equipped with several through-holes in an axial direction, in each through-hole
It is provided with a piece-root grafting terminal, binding post is fixed in through-holes by glass frit seal, and displacement sensor and oil pressure sensor are logical
Binding post is crossed to connect with hydraulic control system.The axial direction of the pedestal upper edge load chamber is provided with two closed slides, rear to load
The bottom of lid, annular loading frame and preceding counter-force lid is respectively arranged with the supporting rack that can be moved forward and backward on guide rail, annular load
Frame is connect with rear load lid, preceding counter-force lid detachable-type sealed.
Further, the annular loading frame includes loaded ring group and is connected between loaded ring group and rear load lid
Transition rings, loaded ring group includes five loaded rings, between adjacent two loaded rings and loaded ring that transition rings are adjacent thereto
Between be equipped with a locating ring, locating ring is coaxial with loaded ring and two end faces are respectively provided with a sealing ring.
Further, load lid after described, transition rings, the outer ring portion of loaded ring and preceding counter-force lid by pull rod in an axial direction
Concatenation, the pull rod are evenly distributed with more around the axle center of load chamber, and the tail portion of pull rod is fastened with nut, the head peace of pull rod
Equipped with bolt drawbench, bolt drawbench has remained load lid, transition after pressure makes during model is in experiment
Palette between ring, loaded ring and preceding counter-force lid.
Further, the outer ring portion of the loaded ring and supporting rack pass through steel plate welding fabrication, the upper table of supporting rack
Face is bonded and is fastened by bolts with the lower surface of loaded ring, and the lower surface corresponding rails of supporting rack are provided with idler wheel.
Further, load lid includes the circular steel plate of front after described, and the rear surface of circular steel plate is welded with convex backwards
The outside portion of the araneose reinforcement ledges gone out, rear load lid includes an annulus steel plate, annulus steel plate front end and circular steel plate
Welding, the medial surface of annulus steel plate are welded with each end for reinforcing ledges.
Further, oil circuit sealed connection mouth and lead-in wire sealing connector, oil are equipped in the loaded ring and transition rings
Road is tightly connected mouth and lead-in wire sealing connector is set to the upper left wall and/or upper right wall of loaded ring.
Further, the thickness of every loaded ring is 400mm, and the thickness of transition rings is 550mm, and preceding counter-force lid adds backwards
The fixed steel plate there are one size for 1120 × 1120 × 40mm in the one side of lid is carried, the rubber of sealing is bonded on the steel plate
Rubber cushion plate.
The stress loading device of this programme, it is detachable close between rear load lid, annular loading frame and preceding counter-force lid
Envelope connection, and slidably facilitate picking and placeing for large scale model on the guide rail of pedestal, mouth is tightly connected by oil circuit and lead is close
The sealing flange design for sealing connector, ensures the leakproofness of load chamber.Annular loading frame includes the structure of loaded ring group, a side
Face, which facilitates, applies staged and segmented stress, on the other hand also more convenient in installation and manufacture.Load lid, transition afterwards
The outer ring portion of ring, loaded ring and preceding counter-force lid is concatenated by pull rod around axle center, ensures that the contact surface stress between each component is equal
It is even, and concentricity is ensured by locating ring, leakproofness is ensured by sealing ring.It is to save manufacturing cost again, reduces whole device
Weight, and to ensure structural strength, the frame structure of steel plate and reinforcing rib is taken in this case.This programme also carries out preceding counter-force lid
Seal Design, to advanced optimize sealing structure.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the structural schematic diagram of single loaded ring in Fig. 1；
Fig. 3 is the structural schematic diagram of rear load lid in Fig. 1；
Fig. 4 is the structural schematic diagram of sealing flange in Fig. 2；
Fig. 5 is the structural schematic diagram of preceding counter-force lid in Fig. 1.
Reference sign：Lid is loaded after 1-；2- loaded rings；3- transition rings；4- pedestals；Counter-force lid before 5-；6- specimen stages；
7- pull rods；8- stress loading components；9- lead-in wire sealing connectors；10- oil circuits are tightly connected mouth；11- supporting racks；12- installations are flat
Platform；13- tie rod holes；14- sealing flanges；17- idler wheels；18- bolt drawbench；25- steel plates；26- rubber mat plates.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
A kind of stress loading device includes the load chamber to testing model pressure used, and load chamber is oil pressure type, with
Hydraulic control system is connected with Hydraulic servo system to carry out pressure and pressure release control.Load chamber is integrally provided on a pedestal 4,
Including axial horizontal rear load lid 1, annular loading frame and preceding counter-force lid 5, the specimen stage 6 that level bears model is arranged
Bottom side in annular loading frame, left side level in annular loading frame towards right setting stress loading component 8, annular plus
The right side level in frame is carried towards left setting stress loading component 8, stress is arranged in the upper vertical in annular loading frame downward
Charging assembly 8, the rear lid 1 that loads is axially towards preceding setting stress loading component 8, and preceding counter-force lid 5 is axially towards rear setting
Preceding reaction plate, as shown in Fig. 1.Above-mentioned stress loading component 8, specimen stage 6 and preceding reaction plate limit in load chamber at one
A pressure space, model placement are wherein pressurized.In general model uses square, therefore, on model, left and right, rear four surfaces
The triaxiality requirement that corresponding stress loading component 8 can be realized.
It is provided with oil circuit on the wall of annular loading frame and is tightly connected mouth 10 and lead-in wire sealing connector 9, in load chamber
Stress loading component 8 by oil circuit be tightly connected mouth 10 connect with Hydraulic servo system, displacement sensing is set in load chamber
Device and oil pressure sensor pass through lead-in wire sealing connector 9 and liquid to detect call parameter, displacement sensor and oil pressure sensor
Pressure control system connects, and to ensure the leakproofness of load chamber, is provided with sealing flange 14 at lead-in wire sealing connector 9, seals
The rounded boss of central part of flange 14, the circumferential part of sealing flange 14 and the wall of annular loading frame are bolted, close
The boss for sealing flange 14 is equipped with several through-holes in an axial direction, is provided with a piece-root grafting terminal 143 in each through-hole 142, connects
Terminal 143 is fixed on by glass frit seal in through-hole 142, and the table top of boss is stretched out at the both ends of binding post 143,
Its both ends is exposed, and one end that binding post 143 is located at outside load chamber is connect with hydraulic control system, and binding post 143, which is located at, to be added
The one end carried in cabin is connect with displacement sensor and oil pressure sensor.Stainless steel, binding post can be selected in sealing flange 14
143 can be the preferable copper material of electric conductivity.Binding post 143 is located at the set rubber sleeve 144 of the part outside through-hole 142, rubber
Gum cover 144, which seals 143 glue of binding post, to insulate, and avoids short-circuit situation between binding post 143.Sealing flange 14 leads to
142 inner wall of hole has groove, increases frictional force in glass solder, ensures fastness.
The axial direction of 4 upper edge load chamber of the pedestal is provided with two closed slides, it is rear load lid 1, annular loading frame and
The bottom of preceding counter-force lid 5 is respectively arranged with the supporting rack 11 that can be moved forward and backward on guide rail, annular loading frame and rear load
Lid 1, the connection of preceding 5 detachable-type sealed of counter-force lid, facilitate the setting for taking and testing test point of model.
The annular loading frame includes the loaded ring group being coaxially concatenated by five loaded rings 2 together, adjacent two
A locating ring, locating ring and load are equipped between loaded ring 2 and between loaded ring 2 that transition rings 3 are adjacent thereto
Ring 2 is coaxial and two end faces are respectively provided with a sealing ring, to ensure the concentricity and leakproofness of connection, adapts to higher stress examination
It tests.Since the stress loading component 8 of rear load lid 1 protrudes capping, between reasonable between proof stress charging assembly 8
Gap connects loaded ring group and rear load lid 1 using transition rings 3, does not set stress loading component 8 in transition rings 3, be
Facilitate the arrangement in structure.Each loaded ring 2 correspond to left and right, upside stress loading component setting mounting platform 12 with
For installation.The stress loading component 8 of upside constitutes entire load chamber and corresponds to answering for model upper surface in each loaded ring 2
Power charging assembly 8, similarly, the corresponding stress loading component 8 of model left and right surfaces are also this structure.Each stress loading
Component 8 has a pair of independent inlet and outlet of fuel channel to realize independent control, the single stress surface of implementation model it is uniform or heterogeneous
Staged stress applies.
Tie rod hole 13 is set on loaded ring 2, transition rings 3, preceding counter-force lid 5 and rear load lid 1, can be used 20
The high-strength long draw 7 of M130mm passes through all loaded rings 2, transition rings 3, preceding counter-force lid 5 and rear load lid 1, is used in combination
Nut fastens.To avoid the experimental rig each group after elongation strain under crustal stress load and high-pressure gas pressure effect of pull rod 7
Gap is generated between part, and in the end of rear load 1 outside link 7 of lid, a bolt drawbench 18 is installed.All bolts are drawn
The in parallel into and out of oil circuit of device 18 is pulled out, nut check is used after applying prestressing force to all pull rods 7 by bolt drawbench 18
Pull rod, when experiment, all bolt drawbench 18 remained certain pressure, ensured the sealing effect of load chamber with this.
For the frame of loaded ring 2, as shown in Fig. 2, the outer ring portion and supporting rack 11 of loaded ring 2 pass through
Quality steel plate welding fabrication, while mitigating ring body quality also need ensure structure intensity, the upper surface of supporting rack 11 with
The lower surface of loaded ring 2 is bonded and is fastened by bolts, and idler wheel 17 is arranged in the lower surface corresponding rails of supporting rack 11.It crosses
The frame for crossing ring 3 is similar.
Frame for rear load lid 1 includes the circular steel plate positioned at front as shown in Fig. 3, and is to avoid circle
Steel plate deforms during force, and proof strength, the rear surface of circular steel plate is welded with the araneose reinforcement protruded backwards
Ledges, the rear outside portion for loading lid 1 include an annulus steel plate, and annulus steel plate front end is welded with circular steel plate, annulus steel plate
Medial surface is welded with each end for reinforcing ledges.Corresponding, the frame of preceding counter-force lid 5 can also take similar structures.
It is equipped with oil circuit on the loaded ring 2 and transition rings 3 and is tightly connected mouth 10 and lead-in wire sealing connector 9,
Oil circuit is tightly connected mouth 10 and lead-in wire sealing connector 9 is distributed in the upper left wall and upper right wall of loaded ring 2.Oil circuit seals
Connector 10 is similar with the structure of lead-in wire sealing connector 9, is all made of the type of attachment of sealing flange 14, such as Fig. 4
Shown in oil circuit be tightly connected the sealing flange 14 of mouth 10, the center portion thereof corresponds to the multiple oil pipe channels 15 of oil circuit setting, edge
One week multiple bolt hole 16 of distribution, so as to the opening being bolted on 3 wall of loaded ring 2 or transition rings.
To meet the experiment of large scale model, the thickness of every loaded ring 2 is 400mm, and the thickness of transition rings 3 is
550mm, preceding counter-force lid 5 load the fixed steel plate there are one size for 1120 × 1120 × 40mm in the one side of lid backwards
25.Plane to prevent high pressure gas from being contacted with model in steel plate 25 generates leakage, the plane that steel plate 25 is contacted with model
Center design together a diameter of 320mm sealing ring, be above bonded with the rubber mat plate 26 of sealing, rubber mat plate
26 are in close contact with test model front end face.When experiment, to reach more preferably effect, the front end face of model is soaked with epoxy resin
The epoxy resin layer of a saturating 1cm thickness, rubber mat plate 26 and the epoxy resin layer of model front end are in close contact, before formation
The sealing structure of counter-force lid 5.
Claims (7)
1. a kind of stress loading device, including load chamber, hydraulic control system and Hydraulic servo system, the load chamber is arranged at a bottom
On seat, it is characterised in that：The load chamber includes the rear load lid, annular loading frame and preceding counter-force lid of axial level, described
Bottom side in annular loading frame is provided with the horizontal specimen stage for bearing model, and left and right, the upside in annular loading frame correspond to
Left and right, the upper surface of model are provided with stress loading component, and the rear surface that the corresponding model of cover rim axial direction is loaded after described is provided with
Stress loading component, the front surface that the preceding counter-force cover rim axially corresponds to model are provided with preceding reaction plate；
It is provided with oil circuit sealed connection mouth on the wall of annular loading frame and lead-in wire sealing connector, stress loading component pass through oil
Road be tightly connected mouth connect with Hydraulic servo system, be provided in load chamber measurement stress loading component displacement displacement sensor with
The oil pressure sensor of stress loading component internal pressure；Sealing flange, the central part of sealing flange are provided at lead-in wire sealing connector
The wall of rounded boss, the circumferential part of sealing flange and annular loading frame is bolted, and the boss of sealing flange is equipped with several
A through-hole in an axial direction is provided with a piece-root grafting terminal in each through-hole, and binding post is fixed in through-holes by glass frit seal,
Displacement sensor and oil pressure sensor are connect by binding post with hydraulic control system；
The axial direction of the pedestal upper edge load chamber is provided with two closed slides, rear load lid, annular loading frame and preceding counter-force lid
Bottom be respectively arranged with the supporting rack that can be moved forward and backward on guide rail, annular loading frame is covered with rear load, preceding counter-force lid can
Detachable is tightly connected.
2. according to a kind of stress loading device described in claim 1, it is characterised in that：The annular loading frame includes adding
The transition rings for carrying ring group and being connected between loaded ring group and rear load lid, loaded ring group include five loaded rings, and adjacent two
It is equipped with a locating ring between loaded ring and between loaded ring that transition rings are adjacent thereto, locating ring is coaxial with loaded ring
And two end faces are respectively provided with a sealing ring.
3. according to a kind of stress loading device described in claim 2, it is characterised in that：Lid is loaded after described, transition rings, is added
The outer ring portion for carrying ring and preceding counter-force lid is concatenated in an axial direction by pull rod, and the pull rod is evenly distributed with around the axle center of load chamber
More, the tail portion of pull rod is fastened with nut, and the head of pull rod is equipped with bolt drawbench, and model is in bolt during experiment
Drawbench has remained after pressure makes palette between load lid, transition rings, loaded ring and preceding counter-force lid.
4. according to a kind of stress loading device described in claim 3, it is characterised in that：The outer ring portion of the loaded ring and
By steel plate welding fabrication, the upper surface of supporting rack is bonded and is fastened by bolts with the lower surface of loaded ring supporting rack, branch
The lower surface corresponding rails of support are provided with idler wheel.
5. according to a kind of stress loading device described in claim 4, it is characterised in that：Load lid includes front after described
Circular steel plate, the rear surface of circular steel plate are welded with the araneose reinforcement ledges protruded backwards, the outside portion of rear load lid
Including an annulus steel plate, annulus steel plate front end is welded with circular steel plate, the medial surface of annulus steel plate and each end for reinforcing ledges
Welding.
6. a kind of stress loading device according to claim 2,4, any one of 5, it is characterised in that：The loaded ring
It is tightly connected mouth and lead-in wire sealing connector with oil circuit is equipped in transition rings, oil circuit is tightly connected mouth and lead-in wire sealing connector
Set on the upper left wall and/or upper right wall of loaded ring.
7. according to a kind of stress loading device described in claim 6, it is characterised in that：The thickness of every loaded ring is
400mm, the thickness of transition rings are 550mm, preceding counter-force lid load backwards in the one side of lid it is fixed there are one size be 1120 ×
The steel plate of 1120 × 40mm is bonded with the rubber mat plate of sealing on the steel plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326236.3A CN106018104B (en) | 2016-05-17 | 2016-05-17 | A kind of stress loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326236.3A CN106018104B (en) | 2016-05-17 | 2016-05-17 | A kind of stress loading device |
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| CN106018104A CN106018104A (en) | 2016-10-12 |
| CN106018104B true CN106018104B (en) | 2018-07-17 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107132124B (en) * | 2017-05-16 | 2020-07-31 | 宁波市交通建设工程试验检测中心有限公司 | Loading device of pressure testing machine |
| CN108332953B (en) * | 2017-10-20 | 2019-02-15 | 北京空天技术研究所 | A kind of internal pressure deformation of cylindrical matching test device for thermal protection structure |
| US10697281B2 (en) | 2018-02-02 | 2020-06-30 | Northeastern University | Large-scale three-dimensional physical model test system and method for deep cavern group |
| CN108375665A (en) * | 2018-02-02 | 2018-08-07 | 东北大学 | A kind of large size deep tunnel group three-dimensional physical model pilot system and method |
| CN108445145A (en) * | 2018-03-01 | 2018-08-24 | 南京理工大学 | A kind of micro-nano energetic material constant volume burning pressure test device |
| CN108895159B (en) * | 2018-05-29 | 2020-05-19 | 宁国市兴源橡胶制品有限公司 | Gas spring sealing ring for automobile |
| CN116025346B (en) * | 2022-12-23 | 2024-05-07 | 重庆大学 | Test piece box module for large-scale thickened oil exploitation test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202631363U (en) * | 2012-07-09 | 2012-12-26 | 重庆大学 | Multi-directional stress loading device |
| KR101253256B1 (en) * | 2012-09-28 | 2013-04-12 | 한국건설기술연구원 | Apparatus for testing structural strength of long span structure in horizontal heating furnace using uniform loading jig, and method for the same |
| CN103499487B (en) * | 2013-10-13 | 2015-07-15 | 大连理工大学 | Complex load tester |
| CN204479281U (en) * | 2015-01-20 | 2015-07-15 | 中国矿业大学 | A kind of six-degree-of-freedom parallel connection mechanism loading system |
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