CN107740841A - A kind of multi-buffer device for SHPB impact tests - Google Patents
A kind of multi-buffer device for SHPB impact tests Download PDFInfo
- Publication number
- CN107740841A CN107740841A CN201710979159.6A CN201710979159A CN107740841A CN 107740841 A CN107740841 A CN 107740841A CN 201710979159 A CN201710979159 A CN 201710979159A CN 107740841 A CN107740841 A CN 107740841A
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- China
- Prior art keywords
- wall pipe
- thin
- layer
- endergonic structure
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
Abstract
The invention discloses a kind of multi-buffer device for SHPB impact tests, including pressure-bearing buffer system, hydraulic pressure body structure and thin-wall pipe endergonic structure, the pressure-bearing buffer system includes buffering outer barrel, cushion rubber layer, second level buffer unit and trip rod termination, cushion rubber layer is sequentially provided with the buffering outer barrel, trip rod termination, second level buffer unit, the hydraulic pressure body structure includes compression disk and compression box, compression disk is connected with second level buffer unit, compression disk moves in compression box, the thin-wall pipe endergonic structure includes hydraulic fluid tank, thin-wall pipe endergonic structure layer and lossless mobile dish, two layers of thin-wall pipe endergonic structure layer is provided with the hydraulic fluid tank, every layer of thin-wall pipe endergonic structure layer is connected with lossless mobile dish.The present invention has the characteristics that safe and efficient, simple to operate, avoids the generation of the peril such as blast off phenomenon during impact test, the guarantee safe efficient progress of SHPB impact tests.
Description
Technical field
The present invention relates to the multi-buffer device for SHPB impact tests, belongs to dynamic rock mechanics separate type Hopkinson
Bar (SHPB) laboratory test field.
Background technology
Split hopkinson bar (hereinafter referred to as SHPB) experiment is the important of mechanical characteristic under study of rocks dynamic action
One of means, at present, the research for the experiment have also gradually been goed deep into, and achieve plentiful and substantial achievement in research.But due to rock
Stone sample density is big, the speed of incident bar, reflective spindle and transmission bar during experiment, for test equipment and testing crew
For there is lot of unstable factor.
During experiment, common buffer unit includes spring bumper, hydraulic damping device etc., wherein, spring delays
Flushing device is the elastic potential energy that the kinetic energy of sample during experiment is changed into spring, and hydraulic damping device is then to utilize fluid
Viscous damping is acted on, and dynamic impulsion energy absorption is converted into fluid heat energy etc. and carries out Pulvis Biofermini Co No Ⅰ.With experiment difficulty
Increase, gradually expose that energy stores form is single, impact direction buffering effect is undesirable, device is difficult to reset or resets hardly possible
The problems such as to control, influence experiment process and the gross error to causing result of the test.Xiao Sanxia, Jiang Guoping (04 month 2014
30 days) a kind of split hopkinson press bar experiment buffer unit is proposed, the device is tied using two cylindrical springs as buffering
The principal mode of structure, the cushioning effect during experiment is realized by piston and piston rod, simple in construction, cost is relatively low.But
SHPB experiments under high strain-rate, rod member speed, action time is shorter, is only tied by spring and piston cylinder as buffering
Structure, it is impossible to which cushioning effect is played in completion, moreover under high velocity effect, spring and piston cylinder easily deform and destroyed, to experiment
The collection of data and whole experiment process produce larger adverse effect；In addition, the patent is in reflective spindle knockout process, kinetic energy
The energy of conversion is not handled, and easily causes the destruction in laboratory apparatus and laboratory, and experimenter is produced potential
Threaten.At present, during SHPB experiments, still advised without buffering, reset and the risk that can realize trial stem well
The buffer unit kept away.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides one kind and is used for SHPB impact tests
Multi-buffer device, have the characteristics that it is safe and efficient, simple to operate, solve SHPB impact tests during reflect rod member at a high speed
The problems such as pedestal destruction, the secondary impact destruction to incident bar, rod member kinetic energy can not absorb and change caused by under effect, keeps away
Exempt from the generation of the peril such as blast off phenomenon during impact test, ensure the safe efficient progress of SHPB impact tests.
Technical scheme：In order to solve the above technical problems, a kind of multi-buffer for SHPB impact tests of the present invention fills
Put, including pressure-bearing buffer system, hydraulic pressure body structure and thin-wall pipe endergonic structure, it is outer that the pressure-bearing buffer system includes buffering
Cylinder, cushion rubber layer, second level buffer unit and trip rod termination, described buffer in outer barrel are sequentially provided with cushion rubber layer, hit
Rod end head, second level buffer unit are hit, the hydraulic pressure body structure includes compression disk and compression box, compresses disk and the second level
Buffer unit connects, and compression disk moves in compression box, and the thin-wall pipe endergonic structure includes hydraulic fluid tank, thin-wall pipe is inhaled
Energy structure sheaf and lossless mobile dish, the hydraulic fluid tank is interior to be provided with two layers of thin-wall pipe endergonic structure layer, every layer of thin-wall pipe energy-absorbing
Structure sheaf is connected with lossless mobile dish, and two lossless mobile dish form cavity, and cavity connects with compression box；Incident bar is hit
The effect of hitting causes reflective spindle to impact cushion rubber layer with certain speed, and impulsive force is delivered to trip rod termination, and trip rod termination is made
For second level buffer unit, the compressing compression disk movement of second level buffer unit, compression disk is moved in compaction cavum
Gas volume, so as to drive lossless mobile dish to move, lossless mobile dish oppress thin-wall pipe endergonic structure layer, thin-wall pipe energy-absorbing
Structure sheaf draws the energy of impact.
Preferably, the second level buffer unit includes three springs, one end of spring is connected with compression disk, spring
The other end is connected with trip rod termination.
Preferably, the material of the cushion rubber layer is natural rubber material.
Preferably, the thin-wall pipe endergonic structure layer includes several energy absorbent blocks, the top of energy absorbent block is square,
The side of energy absorbent block is isosceles trapezoid and isosceles triangle, and isosceles trapezoid is alternately distributed with isosceles triangle, the base of energy absorbent block
For octagon, adjacent energy absorbent block forms cellular three-dimensional space structure by being welded to connect.
Preferably, the material of the thin-wall pipe endergonic structure layer is HDPE sheet materials.
In the present invention, the cushion rubber layer uses the natural rubber material (NR) based on polyisoprene, a diameter of
30cm cylindrical structure is nested in second level buffering outer barrel, with the common pressure-bearing in trip rod termination.The second level buffer unit
Trip rod termination is connected with being connected compression disk by 3 sets of performance identical high-compressibility springs, spring structure is diameter
10cm circle, the center of circle of spring structure are the end points of the positive side triangle centered on the center of circle of second level buffering outer barrel.Institute
State compression tank wall, hydraulic pressure tank wall, the lossless mobile dish of hydraulic fluid tank are smooth interface, zerofriction force acts in moving process.It is described
Thin-wall pipe endergonic structure layer material is the HDPE sheet materials strengthened, and is that regular triangular is welded to be formed with trapezoidal by strength
Three-dimensional netted cell compartment structure, structure sheaf mobile dish lossless with hydraulic fluid tank, hydraulic pressure tank wall are to be welded to connect.The rubber substrate delays
Rush layer and be arranged to 4cm, be connected on the inside of hydraulic pressure tank wall and with thin-wall pipe endergonic structure layer, the lossless mobile dish of hydraulic fluid tank, protected
Protect due to hydraulic pressure it is excessive caused by buffer unit bottom destroy.
Beneficial effect：The multi-buffer device for SHPB impact tests of the present invention, passes through pressure-bearing buffer system, hydraulic pressure
Body structure and thin-wall pipe endergonic structure realize the energy conversion and suction during rock sample SHPB dynamic impact tests
Receive, realizing three-level by cushion rubber layer, second level buffer unit, rubber substrate cushion buffers, and ensure that the peace of experiment
Full property and high efficiency, solve and reflect pedestal caused by under rod member high velocity effect during SHPB impact tests and destroy, to entering
The secondary impact for penetrating bar destroys, rod member kinetic energy can not absorb and the generation of peril such as change；Thin-wall pipe energy-absorbing material is adopted
With the HDPE sheet materials of reinforcing, cheap, applicability and stability are strong, meet the requirement in SHPB experiments and regulation.
Brief description of the drawings
Fig. 1 is laboratory installation overall structure figure of the present invention；
Fig. 2 is apparatus of the present invention cut-away view；
Fig. 3 is thin-wall pipe endergonic structure layer schematic diagram；
Diagram：1. buffer outer barrel；2. the second level buffers outer barrel；3. second level buffer unit；4. cushion rubber layer；5. hit
Rod end head；6. compress disk；7. compress tank wall；8. built in compression box；9. thin-wall pipe endergonic structure layer；10. hydraulic pressure tank wall；
11. rubber substrate cushion；12. built in hydraulic fluid tank；13. the lossless mobile dish of hydraulic fluid tank；14. isosceles trapezoid；15. isoceles triangle
Shape.
Embodiment
As shown in Figure 1 to Figure 3, this kind of multi-buffer device for SHPB impact tests, including pressure-bearing buffer system,
Hydraulic pressure body structure and thin-wall pipe endergonic structure, the device are arranged on SHPB test bracket pedestals, are filled for the experiment end
Put.The pressure-bearing buffer system includes buffering outer barrel 1, cushion rubber layer 4, second level buffer unit 3 and its outer rim 2 and trip rod
Termination 5, the hydraulic pressure body structure includes compression disk 6, compression tank wall 7, built in compression box 8 and hydraulic fluid tank built in 12, it is described
Thin-wall pipe endergonic structure include thin-wall pipe endergonic structure layer 9, hydraulic pressure tank wall 10, rubber substrate cushion 11 and hydraulic fluid tank without
Damage mobile dish 13.
The effect of impact of incident bar causes reflective spindle to impact cushion rubber layer 4 with certain speed, buffers and fills as the first order
Put, natural rubber material (NR) is because the particularity of its material has certain cushioning effect to reflective spindle, and by the active force
Trip rod termination 5 is delivered to, in the presence of second level buffer unit 3 (predominantly 3 sets of performance identical high-compressibility springs),
Spring is compressed and promotes compression disk 6 to moving in built in compression box 8, with compression disk 6 gradually in move, built in compression box
8 with hydraulic fluid tank built in 12 volumes reduce, promote the lossless mobile dish 13 of hydraulic fluid tank to both sides move, compression disk 6 do work(conversion
The work(and part energy moved for the lossless mobile dish 13 of hydraulic fluid tank, energy is gradually absorbed by thin-wall pipe endergonic structure layer 9, complete
Into the absorption and conversion of energy.At the same time, in whole energy conversion and absorption process, in the second level, buffer unit 3 is in height
Under the rebound effect of compressibility spring so that initial position is progressively replied in cushion rubber layer 4 and trip rod termination 5, drives compression
Disk 6 externally does work, and the lossless mobile dish 13 of hydraulic fluid tank return to initial position under pressure, completes an endergonic process.
Under special circumstances, when speed is excessive or caused energy is excessive, it is possible to produce in the case of destruction, rubber substrate cushion
11 can be protected, and prevent secondary injury caused by accident.
As shown in figure 3, thin-wall pipe endergonic structure layer 9 is included comprising several energy absorbent blocks, the top of energy absorbent block is pros
Shape, the side of energy absorbent block is isosceles trapezoid and isosceles triangle, and isosceles trapezoid is alternately distributed with isosceles triangle, the bottom of energy absorbent block
While being octagon, adjacent energy absorbent block forms cellular three-dimensional space structure by being welded to connect.Isosceles trapezoid 14
The length of side of the square that base is formed as the upper surface of the structure, the length of the hypotenuse is the length of side of equilateral triangle, of different shapes
Structure is formed by strength welding manner, forms the three-dimensional netted cell compartment structure in space, and the lossless movement of mobile dish 13 of hydraulic fluid tank is done
Work(be delivered in isosceles trapezoid 14 and isosceles triangle 15, the structure that gradually reduces simultaneously is gradually absorbed.Buffered in the second level
Under the rebound effect of device 3, the energy that thin-wall pipe endergonic structure layer 9 absorbs equally is converted to the lossless mobile dish of support hydraulic case
The kinetic energy of 13 movements, returns to initial position.
Claims (5)
- A kind of 1. multi-buffer device for SHPB impact tests, it is characterised in that：Including pressure-bearing buffer system, hydraulic pressure casing Structure and thin-wall pipe endergonic structure, the pressure-bearing buffer system include buffering outer barrel, cushion rubber layer, second made of rubber Level buffer unit and trip rod termination, described buffer are sequentially provided with cushion rubber layer, trip rod termination, second level buffering in outer barrel Device, the hydraulic pressure body structure include compression disk and compression box, and compression disk is connected with second level buffer unit, compression circle Disk moves in compression box, and the thin-wall pipe endergonic structure includes hydraulic fluid tank, thin-wall pipe endergonic structure layer and lossless movement Disk, is provided with two layers of thin-wall pipe endergonic structure layer in the hydraulic fluid tank, every layer of thin-wall pipe endergonic structure layer with lossless movement Disk connects, and two lossless mobile dish form cavity, and cavity connects with compression box；The effect of impact of incident bar cause reflective spindle with Certain speed impacts cushion rubber layer, and impulsive force is delivered to trip rod termination, and trip rod termination acts on second level buffer unit On, the compressing compression disk movement of second level buffer unit, compression disk moves the gas volume in compaction cavum, so as to drive nothing Mobile dish movement is damaged, lossless mobile dish oppress thin-wall pipe endergonic structure layer, and thin-wall pipe endergonic structure layer draws the energy of impact Amount.
- 2. the multi-buffer device according to claim 1 for SHPB impact tests, it is characterised in that：The second level Buffer unit includes three springs, and one end of spring is connected with compression disk, and the spring other end is connected with trip rod termination.
- 3. the multi-buffer device according to claim 1 for SHPB impact tests, it is characterised in that：The rubber delays The material for rushing layer is natural rubber material.
- 4. the multi-buffer device according to claim 1 for SHPB impact tests, it is characterised in that：The light-wall pipe Part endergonic structure layer includes several energy absorbent blocks, and the top of energy absorbent block is square, the side of energy absorbent block for isosceles trapezoid with etc. Lumbar triangle shape, isosceles trapezoid are alternately distributed with isosceles triangle, and the base of energy absorbent block is octagon, and adjacent energy absorbent block passes through weldering Connect in succession, form cellular three-dimensional space structure.
- 5. the multi-buffer device according to claim 4 for SHPB impact tests, it is characterised in that：The light-wall pipe The material of part endergonic structure layer is HDPE sheet materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979159.6A CN107740841A (en) | 2017-10-19 | 2017-10-19 | A kind of multi-buffer device for SHPB impact tests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979159.6A CN107740841A (en) | 2017-10-19 | 2017-10-19 | A kind of multi-buffer device for SHPB impact tests |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107740841A true CN107740841A (en) | 2018-02-27 |
Family
ID=61237732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710979159.6A Pending CN107740841A (en) | 2017-10-19 | 2017-10-19 | A kind of multi-buffer device for SHPB impact tests |
Country Status (1)
| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359173A (en) * | 2019-08-14 | 2019-10-22 | 浙江慈鑫机械有限公司 | A kind of Computerized flat knitting machine protection mechanism |
| CN117470639A (en) * | 2023-12-22 | 2024-01-30 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
| CN117470639B (en) * | 2023-12-22 | 2024-04-09 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
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| GB191401365A (en) * | 1913-01-28 | 1914-06-25 | Georges Ribis | Improvements in Shock Absorbing Devices for Vehicles. |
| NL9202070A (en) * | 1992-11-30 | 1994-06-16 | Doornes Bedrijfswagen Fab | Controllable frequency-dependent damper system |
| CN2376556Y (en) * | 1999-03-19 | 2000-05-03 | 白泷 | Shock-absorber for vehicle |
| US20040135382A1 (en) * | 2002-10-29 | 2004-07-15 | Aisin Seiki Kabushiki Kaisha | Bumper apparatus for vehicle |
| CN1912418A (en) * | 2006-09-04 | 2007-02-14 | 江苏大学 | Oil-hydraulic-air multimedia coupling vibrition damper |
| CN101638076A (en) * | 2009-08-27 | 2010-02-03 | 王博 | Crease type crash energy absorption box |
| CN103953677A (en) * | 2014-04-14 | 2014-07-30 | 山东科技大学 | Driven anti-collision buffering device |
| CN104976272A (en) * | 2015-07-08 | 2015-10-14 | 中国船舶重工集团公司第七一九研究所 | Heavy load hydraulic damper |
| CN205003016U (en) * | 2015-09-30 | 2016-01-27 | 中国水利水电第八工程局有限公司 | Dynamic testing equipment split hopkinson pressure bar's multi -level buffer device |
-
2017
- 2017-10-19 CN CN201710979159.6A patent/CN107740841A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191401365A (en) * | 1913-01-28 | 1914-06-25 | Georges Ribis | Improvements in Shock Absorbing Devices for Vehicles. |
| NL9202070A (en) * | 1992-11-30 | 1994-06-16 | Doornes Bedrijfswagen Fab | Controllable frequency-dependent damper system |
| CN2376556Y (en) * | 1999-03-19 | 2000-05-03 | 白泷 | Shock-absorber for vehicle |
| US20040135382A1 (en) * | 2002-10-29 | 2004-07-15 | Aisin Seiki Kabushiki Kaisha | Bumper apparatus for vehicle |
| CN1912418A (en) * | 2006-09-04 | 2007-02-14 | 江苏大学 | Oil-hydraulic-air multimedia coupling vibrition damper |
| CN101638076A (en) * | 2009-08-27 | 2010-02-03 | 王博 | Crease type crash energy absorption box |
| CN103953677A (en) * | 2014-04-14 | 2014-07-30 | 山东科技大学 | Driven anti-collision buffering device |
| CN104976272A (en) * | 2015-07-08 | 2015-10-14 | 中国船舶重工集团公司第七一九研究所 | Heavy load hydraulic damper |
| CN205003016U (en) * | 2015-09-30 | 2016-01-27 | 中国水利水电第八工程局有限公司 | Dynamic testing equipment split hopkinson pressure bar's multi -level buffer device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359173A (en) * | 2019-08-14 | 2019-10-22 | 浙江慈鑫机械有限公司 | A kind of Computerized flat knitting machine protection mechanism |
| CN117470639A (en) * | 2023-12-22 | 2024-01-30 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
| CN117470639B (en) * | 2023-12-22 | 2024-04-09 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
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Application publication date: 20180227 |
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