CN110882859A - Large-capacity centrifuge hanging basket capable of running in high overload environment - Google Patents
Large-capacity centrifuge hanging basket capable of running in high overload environment Download PDFInfo
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- CN110882859A CN110882859A CN201911185536.4A CN201911185536A CN110882859A CN 110882859 A CN110882859 A CN 110882859A CN 201911185536 A CN201911185536 A CN 201911185536A CN 110882859 A CN110882859 A CN 110882859A
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- suspension arm
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- overload environment
- hanging basket
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- 239000000725 suspension Substances 0.000 claims abstract description 69
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000004917 carbon fiber Substances 0.000 claims abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 229910001339 C alloy Inorganic materials 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
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- 238000000034 method Methods 0.000 description 5
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- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241000219492 Quercus Species 0.000 description 1
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- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
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Abstract
The invention relates to the field of geotechnical centrifuge structures, and particularly discloses a high-capacity centrifuge hanging basket capable of operating in a high overload environment, which comprises a hanging arm, wherein the hanging arm is formed by overlapping a plurality of layers of hanging arm components; the suspension arm assembly is a U-shaped plate, the bottom of the suspension arm assembly is an arc part, the two sides of the suspension arm assembly are side plates, and the side plates are tangent to the arc part at the bottom; the upper ends of the two sides of the suspension arm are respectively provided with a pin shaft hole used for being connected with the rotating arm of the centrifugal machine, and a bearing assembly is arranged in the pin shaft hole; and a platform is arranged on the arc part at the bottom of the suspension arm. The suspension arm has the advantages that the suspension arm is designed into a whole, and a multi-layer structure is adopted, so that the mechanical property of the high-carbon alloy steel plate can be well inherited, the use requirement is met, and the structure is simple; likewise, the suspension arm made of carbon fiber can meet the use requirement and has lighter weight.
Description
Technical Field
The invention relates to the field of geotechnical centrifuge structures, in particular to a high-capacity centrifuge hanging basket capable of operating in a high-overload environment.
Background
The hanging basket is a key part of the geotechnical centrifuge and is a link between a rotating arm of the centrifuge and the geotechnical model. The centrifugal machine is positioned in a maximum acceleration field of the centrifugal machine, bears huge centrifugal force generated by a model, a model box and self mass during rotation, and the self rigidity and weight directly influence the scale and the operation condition of the centrifugal machine.
At present, the largest geotechnical centrifuge with the established scale in the world is 1200gt (g is gravity acceleration, t is mass unit, ton) geotechnical centrifuge established by the army engineering force of America in 1998, and the largest centrifugal acceleration of 350g is the most important in the world. In order to solve the key problems to be solved urgently in the countries such as the kilometric deep-ground and deep-sea engineering, the geological structure evolution, the underground space utilization and the like, the construction of a large-scale high-rotation-speed geotechnical centrifuge with larger capacity and higher centrifugal acceleration is urgently needed. To build such a centrifuge, the basket design is critical.
Within the country, grandma [ grandma ] geocentrifuge design review [ R ]. nanjing: the soil institute of south Beijing institute of Water conservancy science, 1990, soil 9002 ] proposed a basket design method and basket design requirements; let us et al conducted design studies on general-scale geotechnical centrifuge baskets [ let us, rochow, liu xiaogang, etc.. methods of designing and optimizing geotechnical centrifuge baskets [ mechanical design [ J ], 2009,26 (11): 68-70, designing a giant multifunctional geotechnical centrifuge basket [ bins ], flood building faithful, Liu Xiao Jiang. 33-36, and issued patents for large-scale geotechnical baskets [ satin, chene, rochei, et al. China, 201310284629.9[ P ]; these earth centrifuge baskets are difficult to carry larger loads to operate in more overloaded environments.
The defects of the prior art are as follows:
the existing high-capacity hanging basket is generally formed by hanging a hanging basket platform by two suspension arms through a pin shaft, the hanging basket platform is used for installing test pieces such as a test model box and the like, and centrifugal force generated by the hanging basket platform and the test pieces is transmitted to the two suspension arms through the pin shaft. The hanging basket structure is difficult to realize the operation requirement of heavy load and high rotating speed.
The deflection of the upper plane of the hanging basket platform is an index which is required to be strictly controlled in the design of the hanging basket, and is related to the precision of the geotechnical test. The existing hanging basket structure operates in a high overload environment, and the deflection of a platform is difficult to control. In addition, if the requirements of large load and high rotating speed are to be realized and the requirements of rigidity and strength are to be met, the existing hanging basket structure is difficult to select proper processing materials.
The cause is as follows:
1) the large-load high-rotation-speed geotechnical centrifuge hanging basket has harsh operation condition: the load capacity exceeds 1500gt, the highest centrifugal acceleration exceeds 500g, and the size scale is large;
2) the hanging basket has strict design requirements: on the premise of ensuring a certain safety margin, the whole hanging basket is required to have higher rigidity, the upper plane of the hanging basket has smaller deflection, and the whole quality of the structure is required to be as small as possible;
3) two ends of the existing hanging basket platform are suspended through the suspension arms, and the middle bearing test piece runs in a high overload environment. In order to control the deflection, the platform structure needs to be fully optimized, and steel with better rigidity is selected for processing, but the quality of the platform is also large. In a high overload environment, the deformation of the load and the self-mass can be difficult to control under the action of centrifugal force. And the larger the platform size or the larger the platform mass, the more difficult the deflection is to control.
4) In order to meet the requirements of large load and high rotating speed, structural members of the hanging basket need larger thickness, and the larger the thickness of the alloy material is, the poorer the mechanical property is.
The existing design scheme can not meet the design requirement.
Disclosure of Invention
The invention aims to overcome the defect that a centrifuge basket in the prior art is not suitable for a heavy-load environment, and provides a high-capacity centrifuge basket capable of operating in a high-overload environment, which is simple in structure and can meet the use requirement of high strength.
The purpose of the invention is realized by the following technical scheme: a high-capacity centrifuge hanging basket capable of operating in a high overload environment comprises a hanging arm, wherein the hanging arm is formed by overlapping a plurality of layers of hanging arm components; the suspension arm assembly is a U-shaped plate, the bottom of the suspension arm assembly is an arc part, the two sides of the suspension arm assembly are side plates, and the side plates are tangent to the arc part at the bottom;
the upper ends of the two sides of the suspension arm are respectively provided with a pin shaft hole used for being connected with the rotating arm of the centrifugal machine, and a bearing assembly is arranged in the pin shaft hole;
and a platform is arranged on the arc part at the bottom of the suspension arm.
Specifically, the bearing assembly comprises a joint bearing, a bearing shaft sleeve and a compression nut, the joint bearing is arranged in the bearing shaft sleeve, the bearing shaft sleeve is arranged in the pin shaft hole, an external thread is arranged at one end of the bearing shaft sleeve, and the compression nut is in threaded connection with the bearing shaft sleeve, so that the bearing shaft sleeve is fixed in the pin shaft hole.
Specifically, the bottom of the platform is an arc surface which is attached to the arc part at the bottom of the suspension arm, the top of the platform is a plane, and two end faces of the platform are aligned to two end faces of the arc part at the bottom of the suspension arm.
Specifically, the bottom of the platform is provided with a plurality of lightening holes which are uniformly arranged.
Specifically, the suspension arm assembly is a structure integrally processed and formed by carbon fiber composite materials.
Specifically, the suspension arm assembly is a structure integrally formed by processing a high-strength alloy thin steel plate.
Specifically, the platform is made of a light high-rigidity material.
The invention has the following advantages:
1. two davits with traditional hanging flower basket structure unite two into one, design into a whole, no matter the davit adopts the rigid laminated structure of multilayer high strength alloy, still adopts carbon-fibre composite overall structure, and at centrifuge operation in-process, the davit mainly bears the pulling force, because of the davit arc surface is tangent with the side, the pulling force can smooth transition. In addition, the suspension arm and the rotating arm are connected by a joint bearing, the suspension arm can deform in a self-adaptive manner under the action of centrifugal force, and high stress concentration cannot be generated.
2. If the suspension arm adopts a multi-layer high-strength alloy steel laminated structure, the mechanical property of a high-carbon alloy steel plate can be well inherited, the processing amount is small, and if the suspension arm is integrally processed by adopting a carbon fiber composite material, the suspension arm is light in weight, good in tensile rigidity, and simple in processing technology.
3. The hanging basket platform mainly bears pressure and is good in stress working condition, and even aluminum alloy machining is adopted, the deflection control requirement of the hanging basket platform can be easily met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the suspension arm of the present invention;
FIG. 3 is a schematic structural view of the boom assembly of the present invention;
FIG. 4 is a schematic view of an assembled structure of the bearing assembly of the present invention;
fig. 5 is a structural schematic diagram of the bearing shaft sleeve of the invention;
FIG. 6 is a schematic structural view of the compression nut of the present invention;
FIG. 7 is a schematic structural diagram A of the platform of the present invention;
FIG. 8 is a schematic structural diagram B of the platform of the present invention;
in the figure: the suspension arm comprises a 1-suspension arm body, a 2-suspension arm assembly body, 21-side plates, 22-arc portions, 3-pin shaft holes, 4-platforms, 5-bearing shaft sleeves, 6-joint bearings, 7-compression nuts and 8-lightening holes.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment,
As shown in fig. 1-8, a large-capacity centrifuge basket capable of operating in a high overload environment comprises a suspension arm 1, wherein the suspension arm 1 is formed by overlapping a plurality of layers of suspension arm components 2; the suspension arm component 2 is a U-shaped plate, the bottom of the suspension arm component is provided with an arc part 22, the two sides of the suspension arm component are provided with side plates 21, and the side plates 21 are tangent to the arc part 22 at the bottom;
the upper ends of two sides of the suspension arm 1 are respectively provided with a pin shaft hole 3 used for being connected with a rotating arm of a centrifugal machine, and a bearing assembly is arranged in the pin shaft hole 3;
the platform 4 is arranged on the arc part 22 at the bottom of the suspension arm 1, but in the actual design process, the arc surface at the bottom of the suspension arm 1 is provided with an opening, the bottom of the platform 4 is provided with a corresponding protruding structure, and then the platform 4 and the suspension arm 1 are integrated through the protruding structure and the opening, so that the fixed installation of the platform 4 and the suspension arm 1 is realized.
In the prior art, a large-capacity hanging basket is generally formed by hanging a hanging basket platform by two suspension arms through a pin shaft, centrifugal force generated by the hanging basket platform and a test piece is transmitted to the two suspension arms through the pin shaft, the hanging basket structure is difficult to realize the operation requirement of large load and high rotating speed, and the deflection of the upper plane of the hanging basket platform is an index which is required to be strictly controlled in the design of the hanging basket, so that the deflection is related to the precision of an earth test. The existing hanging basket structure operates in a high overload environment, and the deflection of a platform is difficult to control; in addition, if the requirements of large load and high rotating speed are met and the requirements of rigidity and strength are also met, the existing hanging basket structure is difficult to select proper processing materials; the invention starts from the direction of solving the problem that the strength and the rigidity of the hanging basket are difficult to meet under the condition of heavy load in the existing structure, the size of the hanging basket needs to be increased when the hanging basket is used under the environment of heavy load in the existing structure, but the larger the thickness of each component of the hanging basket is, the poorer the mechanical property is, the problem is the material problem, so the problem cannot be solved by increasing the thickness of the component, and the alloy has good mechanical property when the thickness is smaller, therefore, the improvement suggestion is given;
the traditional hanging basket is characterized in that the thickness of components is large, the structure is complex, the two ends of the hanging basket are connected with the suspension arms, the integral structure is adopted in the embodiment, namely the suspension arms are of the integral structure, the suspension arms are of a composite structure formed by overlapping a plurality of suspension arm components, the suspension arms are integrally machined and formed by carbon fiber composite materials or integrally machined and formed by high-strength alloy thin steel plates, the suspension arms mainly bear tension in the operation process of a centrifugal machine, the arc parts of the suspension arms are tangent to the side plates, the tension can be in smooth transition, in addition, the suspension arms are connected with the rotating arms by joint bearings, the suspension arms can be deformed in a self-adaptive mode under the action of centrifugal force, high stress concentration cannot be generated, the mechanical properties of high-carbon alloy steel plates can be well.
Furthermore, the bearing assembly comprises a joint bearing 6, a bearing shaft sleeve 5 and a compression nut 7, wherein the joint bearing 6 is arranged in the bearing shaft sleeve 5, the bearing shaft sleeve 5 is arranged in the pin shaft hole 3, an external thread is arranged at one end of the bearing shaft sleeve 5, the compression nut 7 is in threaded connection with the bearing shaft sleeve 5, the bearing shaft sleeve 5 is fixed in the pin shaft hole 3, and the bearing shaft sleeve and the pin shaft hole are in gapless fit.
Further, the bottom of the platform 4 is an arc surface, which is attached to the arc portion 22 at the bottom of the suspension arm 1, the top of the platform 4 is a plane, and two end surfaces of the platform 4 are aligned to two end surfaces of the arc portion 22 at the bottom of the suspension arm 1.
Furthermore, in order to reduce the mass of the platform, a plurality of lightening holes 8 are arranged at the bottom of the platform 4, the lightening holes 8 are uniformly arranged, the deflection cannot be increased after the lightening holes 8 are arranged, and the wall between the adjacent lightening holes 8 plays a role of supporting the upper plane of the platform 4 as a reinforcing rib.
Furthermore, the suspension arm components 2 are integrally formed by processing a high-strength alloy thin steel plate, and in order to ensure that the stress of each suspension arm component 2 is uniform when the hanging basket operates, each suspension arm component 2 needs to be pressed together through a tool to process the pin shaft holes 3 during processing, and the pin shaft holes 3 arranged on two sides of the suspension arm 1 are coaxial.
Furthermore, the platform 4 is made of light high-rigidity materials, preferably aluminum alloy, the structural platform mainly bears pressure, does not need to bear the pulling force of the suspension arm on the platform in the prior art, has good stress working condition, and can easily meet the deflection control requirement of the hanging basket platform even if the platform is made of the light high-rigidity materials such as aluminum alloy and the like.
Example II,
Different from the first embodiment, the suspension arm assembly 2 is of a structure integrally formed by carbon fiber composite materials, the carbon fiber composite materials can reduce the overall mass of the hanging basket, and if the carbon fiber composite materials are integrally processed, the suspension arm is light in mass, good in tensile rigidity and simple in processing technology.
The capacity of the hanging basket disclosed by the invention exceeds 1500gt, and the centrifugal acceleration exceeds 500 g; meanwhile, the integral safety factor of the hanging basket is not lower than 2, the maximum deflection of the platform is not more than 1 thousandth of the maximum effective size of the platform, and the hanging basket has a good processing technology.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (7)
1. The utility model provides a can be at high volume centrifuge hanging flower basket that overload environment operated which characterized in that: the suspension arm (1) is formed by overlapping a plurality of layers of suspension arm components (2); the suspension arm assembly (2) is a U-shaped plate, the bottom of the suspension arm assembly is an arc part (22), the two sides of the suspension arm assembly are side plates (21), and the side plates (21) are tangent to the arc part (22) at the bottom;
the upper ends of two sides of the suspension arm (1) are respectively provided with a pin shaft hole (3) used for being connected with a rotating arm of a centrifugal machine, and a bearing assembly is arranged in the pin shaft hole (3);
and a platform (4) is arranged on the arc part (22) at the bottom of the suspension arm (1).
2. A high capacity centrifuge basket operable in a high overload environment according to claim 1 wherein: the bearing assembly comprises a joint bearing (6), a bearing shaft sleeve (5) and a compression nut (7), wherein the joint bearing (6) is arranged in the bearing shaft sleeve (5), the bearing shaft sleeve (5) is arranged in the pin shaft hole (3), an external thread is arranged at one end of the bearing shaft sleeve (5), and the compression nut (7) is in threaded connection with the bearing shaft sleeve (5) to enable the bearing shaft sleeve (5) to be fixed in the pin shaft hole (3).
3. A high capacity centrifuge basket operable in a high overload environment according to claim 1 wherein: the bottom of platform (4) is the arc surface, and it laminates completely with arc portion (22) of davit (1) bottom, and the top of platform (4) is the plane, the both ends face of platform (4) aligns with the both ends face of davit (1) bottom arc portion (22).
4. A high capacity centrifuge basket operable in a high overload environment according to claim 3 wherein: the bottom of the platform (4) is provided with a plurality of lightening holes (8), and the lightening holes (8) are uniformly arranged.
5. A high capacity centrifuge basket operable in a high overload environment according to claim 1 wherein: the suspension arm component (2) is a structure integrally processed and formed by carbon fiber composite materials.
6. A high capacity centrifuge basket operable in a high overload environment according to claim 1 wherein: the suspension arm component (2) is a structure integrally formed by a high-strength alloy thin steel plate.
7. A high capacity centrifuge basket operable in a high overload environment according to claim 1 wherein: the platform (4) is made of light high-rigidity materials.
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6603337U (en) * | 1964-03-14 | 1969-10-02 | Wilhelm Hachtel | ROLLER HANGER FOR SPIN CURTAINS |
EP0186863A2 (en) * | 1984-12-21 | 1986-07-09 | E.I. Du Pont De Nemours And Company | A centrifuge rotor having a flexible carrier with restoring cap assembly |
EP0744611A1 (en) * | 1991-06-11 | 1996-11-27 | Andrew N. Schofield And Associates Limited | Centrifuges, especially for geotechnical testing methods |
CN102652930A (en) * | 2012-04-18 | 2012-09-05 | 中国工程物理研究院总体工程研究所 | Vibration isolation system of vibrating centrifuge |
CN103341418A (en) * | 2013-07-09 | 2013-10-09 | 中国工程物理研究院总体工程研究所 | Giant soil engineering centrifuge hanging basket |
CN207615035U (en) * | 2017-07-28 | 2018-07-17 | 湖南湘仪实验室仪器开发有限公司 | A kind of barrel structure of centrifuge |
CN108766101A (en) * | 2018-09-07 | 2018-11-06 | 中国工程物理研究院总体工程研究所 | Three Degree Of Freedom for helicopter Dynamic Flight Simulator turns frame system |
CN108933372A (en) * | 2018-07-27 | 2018-12-04 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge hanging basket power supply unit |
CN109569900A (en) * | 2019-01-25 | 2019-04-05 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge self balancing device |
CN208928389U (en) * | 2018-10-30 | 2019-06-04 | 中国工程物理研究院总体工程研究所 | A kind of adaptive load transformational structure under super gravity field |
CN211246976U (en) * | 2019-11-27 | 2020-08-14 | 中国工程物理研究院总体工程研究所 | Large-capacity centrifuge hanging basket capable of running in high overload environment |
-
2019
- 2019-11-27 CN CN201911185536.4A patent/CN110882859A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6603337U (en) * | 1964-03-14 | 1969-10-02 | Wilhelm Hachtel | ROLLER HANGER FOR SPIN CURTAINS |
EP0186863A2 (en) * | 1984-12-21 | 1986-07-09 | E.I. Du Pont De Nemours And Company | A centrifuge rotor having a flexible carrier with restoring cap assembly |
EP0744611A1 (en) * | 1991-06-11 | 1996-11-27 | Andrew N. Schofield And Associates Limited | Centrifuges, especially for geotechnical testing methods |
CN102652930A (en) * | 2012-04-18 | 2012-09-05 | 中国工程物理研究院总体工程研究所 | Vibration isolation system of vibrating centrifuge |
CN103341418A (en) * | 2013-07-09 | 2013-10-09 | 中国工程物理研究院总体工程研究所 | Giant soil engineering centrifuge hanging basket |
CN207615035U (en) * | 2017-07-28 | 2018-07-17 | 湖南湘仪实验室仪器开发有限公司 | A kind of barrel structure of centrifuge |
CN108933372A (en) * | 2018-07-27 | 2018-12-04 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge hanging basket power supply unit |
CN108766101A (en) * | 2018-09-07 | 2018-11-06 | 中国工程物理研究院总体工程研究所 | Three Degree Of Freedom for helicopter Dynamic Flight Simulator turns frame system |
CN208928389U (en) * | 2018-10-30 | 2019-06-04 | 中国工程物理研究院总体工程研究所 | A kind of adaptive load transformational structure under super gravity field |
CN109569900A (en) * | 2019-01-25 | 2019-04-05 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge self balancing device |
CN211246976U (en) * | 2019-11-27 | 2020-08-14 | 中国工程物理研究院总体工程研究所 | Large-capacity centrifuge hanging basket capable of running in high overload environment |
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