CN108872027A - It is a kind of it is efficient realize build-up of particles densification gas rush equipment - Google Patents
It is a kind of it is efficient realize build-up of particles densification gas rush equipment Download PDFInfo
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- CN108872027A CN108872027A CN201810714120.6A CN201810714120A CN108872027A CN 108872027 A CN108872027 A CN 108872027A CN 201810714120 A CN201810714120 A CN 201810714120A CN 108872027 A CN108872027 A CN 108872027A
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- 239000002245 particle Substances 0.000 title claims abstract description 43
- 238000000280 densification Methods 0.000 title claims abstract description 23
- 238000009826 distribution Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000011152 fibreglass Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 6
- 238000004080 punching Methods 0.000 abstract description 6
- 238000011160 research Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 description 8
- 210000000498 stratum granulosum Anatomy 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000002459 sustained effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005315 distribution function Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100460844 Mus musculus Nr2f6 gene Proteins 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0019—Means for transferring or separating particles prior to analysis, e.g. hoppers or particle conveyors
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to a kind of gas for efficiently realizing build-up of particles densification to rush equipment comprising bottom leg, cylinder, upper cover, lower head, shell flange, trunnion, pressure sensor and air compressor；Bottom leg is set to the lower part of cylinder, it is used to support the cylinder, the upper end of cylinder is connect with upper cover, the lower end connection of lower head and cylinder, cylinder is surrounded by one or more trunnions, each trunnion is connected to inner barrel, and trunnion is equipped with air inlet for connecting measuring device, the center of upper cover, upper cover trunnion and relief valve are respectively equipped in the two sides of air inlet, upper cover trunnion connects baroceptor, and air compressor connects air inlet, and lower head is equipped with multiple apertures.Gas provided by the invention rushes equipment study stacking states of the particle inside container under different pressures and flow with can be convenient, optimize the technique that gas punching acts on lower build-up of particles densification, journey, which is broken through, for research gas and improves particle apparent density provides effective ways, it is very crucial to the following performance for improving granular materials product.
Description
Technical field
The present invention relates to a kind of gas for efficiently realizing build-up of particles densification to rush equipment, belongs to Physical Experiment equipment and technology neck
Domain.
Background technique
Realize that metallurgy, casting, material and a kind of effective means of chemical field dispersion particle accumulation densification are using gas
Body impact can be such that build-up of particles realizes from loose to fine and close transformation by gas punching.Currently, realizing build-up of particles densification master
To pass through following three kinds of modes：Vibration, compacting and gas impact.However, the noise that vibration generates is big, multicompentnt granular is easy
It is segregated, the time of vibration for reaching densification is long；Compacting is distributed the bulk density of particle since power concentrates near pressing plate
Unevenly, and gas impact energy overcomes these disadvantages well.Under suitable operating condition, gas impact energy is realized well
The accumulation of particle densifies, and high production efficiency can realize densification (for single spheroidal particle 0.2s or so) in a short time,
And obtained bulk density is evenly distributed.
Currently, existing gas rushes, equipment is less, and can not easily all adjust the pressure of pressure, flow and each position of measurement
Power and inside particles interaction force.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of gas for efficiently realizing build-up of particles densification
Impact device, the equipment measure the various parameters in gas impact process in which can be convenient, including gas pressure, inside particles by
Power and bulk density.Dispersion particle (including Preparation of Fine Powders) for metallurgy, casting, material and chemical field is in gas impact bars
The research of accumulation densification under part etc..
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
It is a kind of it is efficient realize build-up of particles densification gas rush equipment comprising bottom leg, cylinder, upper cover, lower envelope
Head, shell flange, trunnion, pressure sensor and air compressor；The bottom leg is set to the lower part of the cylinder, for branch
The cylinder is supportted, the upper end of the cylinder is connect with the upper cover by the shell flange, the lower head and the cylinder
The lower end of body connects, and the cylinder is surrounded by one or more trunnions, and each trunnion is connected to the inner barrel, institute
It states trunnion and is equipped with air inlet for connecting measuring device, the center of the upper cover, is respectively equipped in the two sides of the air inlet
Upper cover trunnion and relief valve, the upper cover trunnion connect baroceptor, and the air compressor connects air inlet, described
Lower head is equipped with multiple apertures.
When the gas rushes equipment for granule particles accumulation densification research, the intracorporal granule particles of cylinder, which are added, can be any shape
The size ratio of shape, granule particles can also be according to experiment changes in demand.Therein, air compressor is used to provide surge,
Surge can be according to particle size and Adjusting Shape.
Gas as described above rushes equipment, it is preferable that flow distribution plate, the shunting are equipped between the upper cover and the cylinder
Plate is porous setting.
Gas as described above rushes equipment, it is preferable that the porous of the flow distribution plate is set as successively being increased by the outside bore dia in center
Big setting.
Gas as described above rushes equipment, it is preferable that the measuring device includes window, baroceptor and/or pressure
Sensor.
Further, multiple trunnions are equipped with 7, wherein a trunnion connects window, and the other three trunnion respectively connects
One baroceptor, remaining three trunnions respectively place a pressure sensor.
Gas as described above rushes equipment, it is preferable that the window includes quartz glass and rubber sheet gasket, the rubber pad
Piece is set between the trunnion and the quartz glass.
Gas as described above rushes equipment, it is preferable that the baroceptor and pressure sensor are connected respectively signal
Amplifier, the signal amplifier are all connected with data delivery casing.
Gas as described above rushes equipment, it is preferable that the exhaust outlet of the air compressor and the air inlet pass through pipeline
Connection is equipped with spinner flowmeter in the center of the pipeline.
Gas as described above rushes equipment, it is preferable that the pipeline of the air compressor and the spinner flowmeter is equipped with
Ball valve is equipped with ball valve between the air inlet and the pipeline.
Gas as described above rushes equipment, it is preferable that the flow of the air compressor is greater than 1.6m3/ min, the cylinder
And/or lower head is glass reinforced plastic production.
If cylinder and lower head are using glass reinforced plastic production, CT scan can be carried out for remainder by unloading upper cover,
Study the internal structure of particle packing.
Gas as described above rushes equipment, it is preferable that the lower head is wholely set with the cylinder, and the lower head is to add
Thickness is arranged, and the aperture of the aperture on the lower head is more than or equal to 4mm.
(3) beneficial effect
The beneficial effects of the invention are as follows：
Gas provided by the invention rushes equipment and studies under different pressures and flow particle with can be convenient inside container
Stacking states, the technique that optimization gas punching acts on lower build-up of particles densification.The equipment applicability is very strong, can be widely used in each
The gas punching accumulation densification of kind particle, including single size and polynary spheric granules, single size and polynary aspherical particle etc.；
Equally, coarse grained accumulation densification both may be implemented, the accumulation densification of fine powder also may be implemented.For research gas break through journey and
It improves particle apparent density and provides effective ways, provide effective equipment to the following performance for improving granular materials product.
It should be pointed out that the part of equipment of the invention is made of nonmetallic materials (glass reinforced plastic), after can be convenient
Continuous stacking states and structure to container internal particle are realized nondestructive inspection (carrying out tomoscan using industry or medicine CT), fixed
Amount obtains macroscopical and each micro-property of particle packing.
Detailed description of the invention
Fig. 1 is the tube structure profilograph of one embodiment of the present invention；
Fig. 2 is the drawing in side sectional elevation of Fig. 1 middle cylinder body structure；
Fig. 3 is the structural schematic diagram of flow distribution plate；
Fig. 4 is the structural schematic diagram of window；
Fig. 5 is the partial structure diagram of lower head；
Fig. 6 is the enlarged drawing in Fig. 5 at I；
Fig. 7 is the overall structure diagram of one embodiment of the present invention.
【Description of symbols】
1：Bottom leg；
2：Trunnion；
3：Shell flange；
4：Flow distribution plate；
5：Upper cover；
6：Cylinder；
7：Lower head；
8：Granule medium；
9：Data delivery casing；
10：Spinner flowmeter；
11：Air compressor；
12：The fixation hole of flow distribution plate；
13：Tap hole；
14：Rubber sheet gasket；
15：Quartz glass；
16：Bolt hole；
17：Gas feed；
18：Relief valve；
19：Window；
C1-C4：Baroceptor；
D1-D3：Pressure sensor；
E1-E4：Baroceptor signal amplifier；
F1-F3：Pressure sensor signal amplifier：
H1-H2：Ball valve.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Embodiment 1
Efficiently realize that the gas of build-up of particles densification rushes equipment, including bottom leg, cylinder, upper cover, lower head, cylinder
Flange, trunnion, pressure sensor and air compressor；Upper cover, cylinder and lower head are in turn connected to form to be impacted for gas
When place particulate matter container, bottom leg be set to cylinder lower part, cylinder is used to support, so that lower head and arranging apparatus
Ground or placed side there is a certain distance, the upper end of cylinder can be fixedly connected with upper cover by shell flange, lower head
It is connect with the lower end of cylinder, in one or more trunnions that are surrounded by of cylinder, each trunnion is connected to inner barrel, trunnion connection
For measuring device；The center of upper cover is equipped with air inlet, is respectively equipped with upper cover trunnion and relief valve in the two sides of air inlet,
Upper cover trunnion can be by flanged joint pressure sensor, for measuring inner barrel pressure；Air compressor connects air inlet,
Lower head is equipped with multiple apertures.In use, the various particles of gas punching accumulation densification can will be needed to be placed in cylinder, air is opened
Compressor, air compressor provide high pressure gas, various particles can be accumulated to densification under the action of high pressure gas impact force,
Last gas is discharged by the aperture of lower head.
Embodiment 2
The present embodiment is on the basis of embodiment 1, the trunnion on cylinder to be set as 7, as shown in Figure 1, bottom leg 1
It being fixedly mounted on cylinder 6, upper cover 5 is tightly connected by shell flange 3 and cylinder 6, and the lower end of cylinder 6 is set as lower head 7,
Glass reinforced plastic production can be used in cylinder 6, and container endoparticle maximum weight is 2000kg/m3.7 branch are equipped with the week of cylinder 6
Ear 2, in side, another 6 point two rows of to be arranged in side for one of setting, every 3 in the vertical direction same straight line parallel set
It sets, only shows three trunnions of a row in Fig. 1, three trunnions of another row are not shown.Pass through flange on the trunnion 2 that side is one
It is connected with window 19, can be fixed by flange；Three trunnions of the same row of the other side be connected separately with baroceptor C1,
C2 and C3, remaining three trunnions are used for placement force sensor D1, D2 and D3.The height of two rows of trunnions may be configured as same height
Degree, i.e. baroceptor C1 and pressure sensor D1 are sustained height, and baroceptor C2 and pressure sensor D2 are same height
Degree, baroceptor C3 and pressure sensor D3 are sustained height setting.Baroceptor can be fixedly connected on branch by flange
On ear, pressure sensor is placed in inner barrel by trunnion, by the flange configured on trunnion, flange is equipped with hole, is used for
Across the data line of connection pressure sensor.
Each trunnion can also be set as needed in different height.
Baroceptor is placed in the intracorporal stratum granulosum internal gas pressure of cylinder for measuring, and monitors in real time inside stratum granulosum
Pressure change, the densification mechanism in learning gas impact process.Pressure sensor is used to measure the pressure inside stratum granulosum, real
When monitoring stratum granulosum internal pressure variation, influence of the learning gas pressure to particle stressor layer.Cross section in Fig. 1 at A-A
Figure is as shown in Figure 2, it can be seen that baroceptor C1-C3, pressure sensor D1-D3, shown in position.Wherein, window is connected
The diameter of trunnion of 19 trunnion than connecting sensor is big, convenient for observing the state of inner barrel particulate matter.It is opened on upper cover 5
Equipped with air inlet 17, air inlet 17 is equipped with air inlet flange, is equipped with upper cover trunnion and relief valve in the two sides of air inlet 17
18, upper cover trunnion is connected with baroceptor C4, enters the intracorporal gas pressure of cylinder for measuring.Relief valve 18 is for guaranteeing
The pressure release of pressure when cylinder internal pressure is greater than security settings internal pressure, guarantees using safe.
In order to which the air pressure impact force for providing air compressor is can be uniformly dispersed out, it is equipped between upper cover 5 and cylinder 6
Flow distribution plate 4.Flow distribution plate 4 is porous setting.In order to by high-speed flow uniform divided flows to whole container, the bore dia of flow distribution plate by
The setting that center is sequentially increased outward, as shown in figure 3, the outer edge of flow distribution plate is equipped with the fixation hole 12 of flow distribution plate, for that will divide
Flowing plate 4 is fixed on cylinder 6, and the centre of flow distribution plate 4 is equipped with multiple tap holes 13, and the tap hole 13 of flow distribution plate is close to cylinder inboard wall
Setting is gradually reduced to central aperture.
Further, as shown in figure 4, window 19 includes high-intensitive quartz glass 15 and rubber sheet gasket 14, wherein high-strength
The maximum pressure of bearing of the quartz glass 15 of degree is 1.6MPa, and rubber sheet gasket 14 is set between trunnion and quartz glass 15, on trunnion
It is using bolt that quartz glass 15 is fixed equipped with bolt hole 16.
The lower head of cylinder body bottom can be to be wholely set with cylinder, and lower head thickeies setting, to bear biggish pressure
Power, and lower head be it is porous, the size of granule medium needs the size greater than hole, so it is true to need the attribute of granule medium
Determine the size in hole, the pore size of aperture needs to be less than the size of granule medium, and the diameter of smallest aperture can reach 4mm, to protect
Experiment effect is demonstrate,proved, the flow of air compressor needs to be greater than 1.6m3/min.As shown in figure 5, for porous setting position on lower head
It sets, wherein Fig. 6 is the enlarged drawing in Fig. 5 at I.
Embodiment 3
The present embodiment be on the basis of embodiment 2, in order to facilitate regulating gas pressure and gas flow, as shown in fig. 7,
It is connect with air inlet by pipeline in the exhaust outlet of air compressor, is equipped with spinner flowmeter 10 in the center of pipeline, can be used for
The flow of gas is measured, the two sides of spinner flowmeter 10 are respectively equipped with ball valve H1 and H2, connect the ball of that side of air compressor
Valve H2 is used to adjust the gas flow of air compressor offer, is equipped with air inlet flange in air inlet and connect with pipeline, air inlet
Flange and pipeline are equipped with ball valve H1, and ball valve H1 is used to control the gas flow size entered inside cylinder 4.
In order to measure the accuracy of 4 air pressure inside situation of cylinder, company is respectively corresponded in baroceptor and pressure sensor
It is connected to baroceptor signal amplifier and pressure sensor signal amplifier, shown in Fig. 7, baroceptor C1-C4 is corresponding
Baroceptor signal amplifier E1-E4 is connected, pressure sensor is correspondingly connected with pressure sensor signal amplifier F1-F3, gas
Pressure sensor signal amplifier E1-E4 and pressure sensor signal amplifier F1-F3 are all connected with data delivery casing 9, finally will letter
Number summarize and to be output to data delivery casing 9, saves real-time experimental data.
Equipment at work, will test the required granule medium 8 and be packed into cylinder 6 that (particle bed height is greater than sensing
The height of device C1), and three pressure sensor D1-D3 are put into inside the stratum granulosum of different height by trunnion, it will count respectively
The flange connected from trunnion according to line is drawn, and by four flanged joints on baroceptor C1-C4 and chamber wall, C1 and D1,
C2 and D2, C3 and D3 are distributed on sustained height, and in order to measure the variation in level pressure and air pressure, research gas punching is caused
Densification mechanism, by the fixed baroceptor of flange, pressure sensor is placed on inside stratum granulosum, and pressure sensor passes through method
Blue (flange has brill aperture, connects data line) connects out data line, then puts the data line of sensor with corresponding signal
Big device connection, is aggregated into data delivery casing, and check whether sensor is normal.Finally upper cover is connected with cylinder by flange 3
It connects and checks leakproofness.18 pressure of relief valve is adjusted to 1.3MPa, valve H1 and H2 is closed and opens air compressor 11, will press
The gas bag of contracting machine is filled to specified pressure.
When experiment starts, valve H2 and H1 are opened respectively, makes high-speed gas through 4 shunting function of flow distribution plate in granule medium
On 8, while baroceptor C1-C4 or pressure sensor D1-D3 records granule medium 8 by data delivery casing 9 in cylinder in real time
Variable condition inside body 6.After the completion of gas impact, particle bed height after gas impacts is observed by window 19, is calculated high
Packing density of particle after degree, gas effect.Assuming that the particle bed height initially accumulated is hinitial(with straight drum part bottom level
It is rear same for 0mm), the height after gas impact is hfinal, the density of granule medium is ρs, quality m, pressure vessel diameter is
D, lower head spherical part volume are Vb, then initial bulk density ρinitialWith the bulk density ρ after gas impactfinalIt presses respectively
Following formula obtains：
The data stored by data delivery casing can analyze state and rule in different moments cylinder endoparticle, be
The process optimization of actual production is provided fundamental basis.In addition, in analysis particle macroscopic property, such as ligancy, radial distribution function
Whens equal, need to unload upper cover 5, flow distribution plate 4 and sensor after the completion of gas rushes, it, can since this equipment uses nonmetallic production
The stacking states of particle and structure are realized nondestructive inspection (carrying out tomoscan using industry or medicine CT), at image
Reason obtains the centre coordinate of each particle in container, to calculate the ligancy and radial distribution function of particle.
The above described is only a preferred embodiment of the present invention, being not the limitation for doing other forms to the present invention, appoint
What those skilled in the art can use the equivalence enforcement that technology contents disclosed above were changed or be modified as equivalent variations
Example.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to the above embodiments
What simple modification, equivalent variations and remodeling, still falls within the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of gas for efficiently realizing build-up of particles densification rushes equipment, which is characterized in that it include bottom leg, cylinder, on
End socket, lower head, shell flange, trunnion, pressure sensor and air compressor；The bottom leg is set under the cylinder
Portion is used to support the cylinder, and the upper end of the cylinder is connect with the upper cover by the shell flange, the lower head
It is connect with the lower end of the cylinder, the cylinder is surrounded by one or more trunnions, and each trunnion is connected to the cylinder
Internal portion, the trunnion is for connecting measuring device, and the center of the upper cover is equipped with air inlet, in the two sides of the air inlet
Be respectively equipped with upper cover trunnion and relief valve, the upper cover trunnion connects baroceptor, the air compressor connect into
Port, the lower head are equipped with multiple apertures.
2. gas as described in claim 1 rushes equipment, which is characterized in that be equipped with and shunt between the upper cover and the cylinder
Plate, the flow distribution plate are porous setting.
3. gas as claimed in claim 2 rushes equipment, which is characterized in that the porous of the flow distribution plate is set as straight from center to exit orifice
The setting that diameter is sequentially increased.
4. gas as described in claim 1 rushes equipment, which is characterized in that the measuring device includes window, baroceptor
And/or pressure sensor.
5. gas as described in claim 1 rushes equipment, which is characterized in that the trunnion is equipped with 7, wherein a trunnion connection
Window, the other three trunnion respectively connect a baroceptor, and remaining three trunnions respectively place a pressure sensor.
6. gas as described in claim 4 or 5 rushes equipment, which is characterized in that the window includes quartz glass and rubber pad
Piece, the rubber sheet gasket are set between the trunnion and the quartz glass.
7. gas as described in claim 4 or 5 rushes equipment, which is characterized in that the baroceptor and pressure sensor difference
It is correspondingly connected with signal amplifier, the signal amplifier is all connected with data delivery casing.
8. gas as described in claim 1 rushes equipment, which is characterized in that the exhaust outlet of the air compressor and the air inlet
It is connected by pipeline, is equipped with spinner flowmeter in the center of the pipeline.
9. gas as claimed in claim 8 rushes equipment, which is characterized in that the pipe of the air compressor and the spinner flowmeter
Road is equipped with ball valve, and ball valve is equipped between the air inlet and the pipeline.
10. gas as described in claim 1 rushes equipment, which is characterized in that the flow of the air compressor is greater than 1.6m3/ min,
The cylinder and/or lower head are glass reinforced plastic production；
The lower head is wholely set with the cylinder, and the lower head is to thicken setting, the hole of the aperture on the lower head
Diameter is more than or equal to 4mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810714120.6A CN108872027A (en) | 2018-06-29 | 2018-06-29 | It is a kind of it is efficient realize build-up of particles densification gas rush equipment |
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|---|---|---|---|
| CN201810714120.6A CN108872027A (en) | 2018-06-29 | 2018-06-29 | It is a kind of it is efficient realize build-up of particles densification gas rush equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612887A (en) * | 2018-11-26 | 2019-04-12 | 东北大学 | A kind of gas impact couples the device of porous top plate punching press |
| CN113074907A (en) * | 2021-03-31 | 2021-07-06 | 东北大学 | Constant pressure device with particle impact function and multi-position force measurement change function by gas |
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