CN115780111A - Cable-integrated geotechnical centrifuge combined rotating arm structure - Google Patents
Cable-integrated geotechnical centrifuge combined rotating arm structure Download PDFInfo
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- CN115780111A CN115780111A CN202211369444.3A CN202211369444A CN115780111A CN 115780111 A CN115780111 A CN 115780111A CN 202211369444 A CN202211369444 A CN 202211369444A CN 115780111 A CN115780111 A CN 115780111A
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- geotechnical centrifuge
- rotating arm
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- 229910052802 copper Inorganic materials 0.000 claims abstract description 31
- 239000010949 copper Substances 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000008054 signal transmission Effects 0.000 claims abstract description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention relates to the technical field of geotechnical centrifuges, and particularly discloses a cable-integrated geotechnical centrifuges combined rotating arm structure which comprises a main arm and an auxiliary arm, wherein a mounting hole is formed in the middle of the main arm, the auxiliary arm is mounted on the main arm, the auxiliary arm comprises connecting plates and side plates, the two connecting plates are arranged in a straight line, the two side plates are symmetrically arranged on two sides of the two connecting plates, copper bars are embedded in the side plates, and signal transmission cables are embedded in the connecting plates. The invention has the advantages that the geotechnical centrifuge has the functional requirements of supplying power to the experimental model and outputting the experimental test signal under various centrifugal acceleration, and the requirement of developing the geotechnical centrifuge experiment is met.
Description
Technical Field
The invention relates to the technical field of geotechnical centrifuges, in particular to a cable-integrated geotechnical centrifuge combined rotating arm structure.
Background
The geotechnical centrifuge is an experimental device applied to the fields of geotechnical engineering and the like, and can simulate a supergravity field by utilizing a stable centrifugal acceleration field formed by high-speed rotation. According to the similarity ratio principle of the model, researchers can perform experimental research on hectometer high dams, giant landslides and the like in the real world on the geotechnical centrifuge, evaluate the safety of the high dams, the giant landslides and the like, and master the landslide occurrence mechanism and the like. In addition, the geotechnical centrifuge is also widely applied to the fields of deep-sea engineering, underground environment pollutant assessment, earthquake resistance assessment of urban building structures, high-energy explosion research and the like, and provides powerful support for important strategic fields of major engineering disaster prevention and reduction, energy development, environmental protection and the like.
A high-speed, high-capacity geotechnical centrifuge (where g is gravity acceleration and t is ton in mass) has an important role in studying geological evolution, environmental pollutant migration, and the like, and its typical structure and composition are shown in fig. 1.
In order to meet the requirements of experiments, the geotechnical centrifuge is required to have the capability of transmitting electric power to a model or an experimental device in a hanging basket and outputting an experimental test electric signal to ground data acquisition and analysis equipment. The existing geotechnical centrifuge adopts cables for supplying power to the model in the hanging basket and outputting test signals. The cable extends out of the preformed hole on the rotating shaft and needs to extend to the hanging basket along the rotating arm. During operation, the geotechnical centrifuge can generate a large centrifugal force (up to n times of the self weight of the geotechnical centrifuge, which is related to the g value of the geotechnical centrifuge) on an object mounted on the geotechnical centrifuge. Therefore, in order to prevent the cable from being broken under the action of centrifugal force, protective measures need to be taken, and the existing solution is to press or bind the cable on a protrusion of a rotating arm of the geotechnical centrifuge through a plurality of wire clamp or nylon strapping tapes so that the cable rotates at high speed along with the rotating arm of the geotechnical centrifuge, and the cable is protected through the wire clamp and the strapping tapes.
The existing fixing and connecting mode of the rotating arm and the cable has the following problems:
1. increase geotechnical centrifuge windage resistance
After the geotechnical centrifuge reaches the rotation speed required by the experiment, most of the power generated by the driving unit of the geotechnical centrifuge is used for overcoming the wind resistance in operation, and the consumed energy is mainly converted into heat generated by the friction between the rotating arm of the centrifuge and air. In a relatively closed machine chamber, if the partial heat cannot be removed in time, the temperature rise in the machine chamber is increased, the accuracy of an experimental result is influenced, and even the safe operation of the centrifugal machine is endangered. Therefore, the smooth outer surface of the rotating arm can reduce wind resistance, reduce heat generated by friction and reduce energy consumption.
The existing cable arrangement mode causes the cable to protrude out of the upper surface of the rotating arm, damages the good pneumatic appearance of the rotating arm and increases the wind resistance of the centrifuge in operation.
2. Weak protection ability
To ensure that the cable is firmly fixed on the rotating arm of the geotechnical centrifuge, the friction force between the cable and the wire clamp needs to be larger than the centrifugal force borne by the cable in a centrifugal field. Under the certain condition of wire clip quantity, the clamp force of increase wire clip is the only way that improves frictional force between cable and wire clip, and the clamp force is not enough to lead to the cable to be broken by centrifugal force, and the clamp force too big leads to the cable to be pressed from both sides by the wire clip and presss from both sides absolutely easily, is difficult to control.
In addition, when the centrifugal acceleration of geotechnical centrifuge increases, the structural strength of clamp is just not enough to resist the centrifugal force effect. Therefore, when the centrifugal acceleration of the geotechnical centrifuge is higher than 350g, the reliable fixing of the cable cannot be realized in the conventional mode (the conventional cable fixing mode is only mature and applied to the geotechnical centrifuge below 350 g)
3. Influencing structural strength and dynamic balance of pivoted arm
The wire clamp for fixing the cable needs to prefabricate a screw hole on the rotating arm of the geotechnical centrifuge, and the screw hole for processing and installing the cable wire clamp on the rotating arm can cause the stress value of the opening position of the rotating arm of the centrifuge to be greatly increased, so that the rotating arm is easy to generate structural damage at the screw hole under a centrifugal field, and the safe operation of the high-speed geotechnical centrifuge is seriously influenced.
In addition, the cables are arranged on the rotating arm by drilling, so that the mass distribution of the rotating component is uneven, the dynamic balance of the rotating arm is affected, and the vibration of the geotechnical centrifuge during operation is large.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cable-integrated geotechnical centrifuge combined rotating arm structure.
The purpose of the invention is realized by the following technical scheme: the cable-integrated geotechnical centrifuge combined rotating arm structure comprises a main arm and auxiliary arms, wherein mounting holes are formed in the middle of the main arm, the auxiliary arms are mounted on the main arm and comprise connecting plates and side plates, the two connecting plates are arranged in a straight line shape, the two side plates are symmetrically arranged on two sides of the two connecting plates, copper bars are pre-buried in the side plates, and signal transmission cables are pre-buried in the connecting plates.
Specifically, the curb plate on the symmetry be provided with two copper bars, the one end of copper bar is located the middle part of curb plate, and the other end is located the tip of curb plate, all be provided with attach fitting on the tip of copper bar.
Specifically, the middle part of the copper bar is provided with a bending part.
Specifically, a boss is arranged at the bottom of the auxiliary arm, an installation groove is formed in the top of the main arm, and the boss of the auxiliary arm is arranged in the installation groove and is connected to the main arm through a bolt.
Specifically, the middle part of the side plate is provided with a semicircular clamping groove, the semicircular clamping grooves of the two side plates are spliced into a complete circular clamping groove, and the connecting plates are arranged on two sides of the circular clamping groove.
Specifically, the surface of the copper bar is subjected to insulation treatment.
Specifically, the connecting plate and the side plates are made of carbon fiber materials and are formed through hot pressing by a die.
Specifically, one side of each of the two side plates opposite to each other is provided with a mounting table, and the connecting plate is arranged on the mounting table and connected with the side plates through bolts.
The invention has the following advantages:
1. according to the invention, the cable and the copper bar are embedded in the auxiliary arm made of the high-strength carbon fiber material, the centrifugal force borne by the cable in a centrifugal field is shared by utilizing the characteristics of the carbon fiber material such as high strength and high rigidity, the reliable fixation and protection of the cable are realized, meanwhile, the projections on the outer surface of the rotating arm of the geotechnical centrifuge are reduced, the main parts of the auxiliary arm are solidified and molded through the mold, the smooth transition of the outer surface can be realized, and thus the wind resistance of the geotechnical centrifuge is reduced.
2. The auxiliary arm adopts the symmetry structure that opens and shuts, links to each other with the main arm through the screw, and the later stage of being convenient for is maintained and is changed, has reduced the replacement cost, and it is from becoming integrative, and accessible dynamic balance checks and the balancing can not influence the dynamic balance of geotechnological centrifuge rocking arm after guaranteeing to assist the arm installation.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic view of the combined rotating arm structure of the present invention;
FIG. 3 is a schematic view of an auxiliary arm structure according to the present invention;
FIG. 4 is a schematic view of the side panel of the present invention;
FIG. 5 is a schematic view of a copper bar structure according to the present invention;
FIG. 6 is a schematic view of the connection plate structure of the present invention;
in the figure: 101-rotating arm, 102-pipeline, 103-rotating shaft, 104-pipe clamp, 105-hanging basket, 106-support, 1-main arm, 2-auxiliary arm, 3-connecting plate, 4-side plate, 5-connecting joint, 6-signal transmission cable, 7-boss, 8-circular clamping groove, 9-mounting table, 10-semicircular clamping groove, 11-copper bar, 12-bending part and 13-mounting groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising "does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1 to 6, the cable-integrated geotechnical centrifuge combined rotating arm structure comprises a main arm 1 and an auxiliary arm 2, wherein a mounting hole is formed in the middle of the main arm 1, the auxiliary arm 2 is mounted on the main arm 1, the auxiliary arm 2 comprises connecting plates 3 and side plates 4, the two connecting plates 3 are arranged in a straight line, the two side plates 4 are symmetrically arranged on two sides of the two connecting plates 3, copper bars 11 are pre-buried in the side plates 4, and signal transmission cables 6 are pre-buried in the connecting plates 3. According to the invention, an auxiliary arm 2 is arranged on a main arm 1 of a centrifuge, the auxiliary arm 2 is connected to the main arm 1 through a bolt to form a rotating arm of the centrifuge, a model or an experimental device in a hanging basket at one end of the rotating arm is used for transmitting electric power and testing electric signals for experiments through the auxiliary arm 2, the auxiliary arm 2 is arranged to reduce the protrusion on the outer surface of the rotating arm of the geotechnical centrifuge, and main parts of the auxiliary arm 2 are solidified and formed through a mold, so that smooth transition of the outer surface can be realized, and the wind resistance of the geotechnical centrifuge is reduced.
Further, curb plate 4 on the symmetry be provided with two copper bars 11, the one end of copper bar 11 is located the middle part of curb plate 4, and the other end is located the tip of curb plate 4, all be provided with attach fitting 5 on the end of copper bar 11. In this embodiment, two copper bars 11 are arranged on each side plate 4, two ends of each copper bar 11 are provided with connecting joints 5, and the connecting joints 5 are used for wiring, so that the two copper bars 11 on the same side plate 4 respectively transmit electric power to test models at two ends of the rotating arm, and the side plates 4 are of symmetrical structures.
Furthermore, a bending part 12 is arranged in the middle of the copper bar 11. In order to prevent the copper bar 11 and the side plate 4 from sliding in the centrifugal field, the middle of the copper bar 11 is bent at multiple positions to form multiple bending parts 12 so as to improve the connection strength between the copper bar and the side plate 4.
Further, a boss 7 is arranged at the bottom of the auxiliary arm 2, an installation groove 13 is arranged at the top of the main arm 1, and the boss 7 of the auxiliary arm 2 is arranged in the installation groove 13 and connects the auxiliary arm 2 to the main arm 1 through a bolt. In the embodiment, the boss 7 is arranged at the bottom of the auxiliary arm 2, the mounting groove 13 is arranged at the top of the main arm 1, the auxiliary arm is limited by matching the boss 7 with the mounting groove 13, the auxiliary arm 2 is connected to the main arm 1 through a bolt after the boss 7 of the auxiliary arm 2 is placed in the mounting groove 13, and the main arm 1 is reserved with a connecting hole.
Furthermore, the middle parts of the side plates 4 are provided with semicircular clamping grooves 10, the semicircular clamping grooves 10 of the two side plates 4 are spliced into a complete circular clamping groove 8, and the two connecting plates 3 are arranged on two sides of the circular clamping groove 8. The semicircular clamping groove 10 of the side plate 4 is clamped on the main shaft during installation.
Further, the surface of the copper bar 11 is subjected to insulation treatment. In the embodiment, the outer surface of the copper bar 11 is subjected to insulation treatment before being embedded, for example, an insulating sleeve is sleeved, an insulating material is coated, and the like, and strong electricity is transmitted by adopting the copper bar 11 which is subjected to insulation treatment and bent at multiple positions, so that the interface connection strength between the copper bar 11 and a carbon fiber material is improved, and the reliability of large-current output is improved.
Further, the connecting plate 3 and the side plate 4 are made of carbon fiber materials and are formed by hot pressing through a die. The side plate 4 is made of carbon fiber materials, and is formed by hot pressing through a mold, and the bottom and the middle part are respectively provided with a positioning surface and a positioning hole which are corresponding to the main arm 1 and the main shaft, in the embodiment, the characteristics of high strength, high rigidity and the like of the carbon fiber materials are utilized to share the centrifugal force borne by the cable in a centrifugal field, so that the reliable fixing and protection of the cable are realized, the cable is pre-embedded in the auxiliary arm 2 made of the carbon fiber, the protrusions on the outer surface of the rotating arm of the geotechnical centrifuge are reduced, the main part of the auxiliary arm is formed by curing through the mold, the smooth transition of the outer surface can be realized, so that the wind resistance of the geotechnical centrifuge is reduced, the connecting plate 3 is pre-embedded with experimental test signal transmission cables 11 with different specifications, two ends of the signal transmission cables 11 are provided with plug-in, and the plug-in are respectively exposed out of the upper surface and the side surface of the connecting plate 3; the auxiliary arm 2 taking the carbon fiber as the main material has high strength, light structure and good weather resistance, and can adapt to the indoor environment of a centrifuge and bear the centrifugal acceleration of more than 350 g.
Furthermore, one side of each of the two side plates 4 opposite to each other is provided with a mounting table 9, and the connecting plate 3 is arranged on the mounting table 9 and connected with the side plates 4 through bolts. In this embodiment, a threaded hole is formed in the mounting table 9, steps adapted to the mounting table 9 of the side plate 4 are arranged on two sides of the connecting plate 3, and the threaded hole is formed in the steps and used for connecting a bolt.
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 all within the protection scope of the present invention, unless the content of the technical scheme of the present invention is departed from.
Claims (8)
1. The utility model provides a geotechnique's centrifuge combination rocking arm structure of integrated cable which characterized in that: the auxiliary arm comprises a main arm (1) and an auxiliary arm (2), wherein a mounting hole is formed in the middle of the main arm (1), the auxiliary arm (2) is installed on the main arm (1), the auxiliary arm (2) comprises connecting plates (3) and side plates (4), the connecting plates (3) are arranged in a straight line shape, the side plates (4) are symmetrically arranged on two sides of the connecting plates (3), copper bars (11) are pre-embedded in the side plates (4), and signal transmission cables (6) are pre-embedded in the connecting plates (3).
2. The cable-integrated geotechnical centrifuge combined rotating arm structure according to claim 1, wherein: curb plate (4) on the symmetry be provided with two copper bars (11), the one end of copper bar (11) is located the middle part of curb plate (4), and the other end is located the tip of curb plate (4), all be provided with attach fitting (5) on the end of copper bar (11).
3. The cable-integrated geotechnical centrifuge combined rotating arm structure according to claim 1, wherein: the middle part of the copper bar (11) is provided with a bending part (12).
4. The cable-integrated geotechnical centrifuge combined rotating arm structure as claimed in claim 1, wherein: the auxiliary arm is characterized in that a boss (7) is arranged at the bottom of the auxiliary arm (2), an installation groove (13) is formed in the top of the main arm (1), the boss (7) of the auxiliary arm (2) is arranged in the installation groove (13), and the auxiliary arm (2) is connected to the main arm (1) through a bolt.
5. The cable-integrated geotechnical centrifuge combined rotating arm structure according to claim 1, wherein: the middle of the side plate (4) is provided with a semicircular clamping groove (10), the semicircular clamping grooves (10) of the two side plates (4) are spliced into a complete circular clamping groove (8), and the two connecting plates (3) are arranged on two sides of the circular clamping groove (8).
6. The cable-integrated geotechnical centrifuge combined rotating arm structure as claimed in claim 1, wherein: and the surface of the copper bar (11) is subjected to insulation treatment.
7. The cable-integrated geotechnical centrifuge combined rotating arm structure as claimed in claim 1, wherein: the connecting plate (3) and the side plate (4) are made of carbon fiber materials and are formed by hot pressing through a die.
8. The cable-integrated geotechnical centrifuge combined rotating arm structure according to claim 1, wherein: and one side, opposite to the two side plates (4), is provided with a mounting table (9), and the connecting plate (3) is arranged on the mounting table (9) and is connected with the side plates (4) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369444.3A CN115780111A (en) | 2022-11-03 | 2022-11-03 | Cable-integrated geotechnical centrifuge combined rotating arm structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369444.3A CN115780111A (en) | 2022-11-03 | 2022-11-03 | Cable-integrated geotechnical centrifuge combined rotating arm structure |
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| Publication Number | Publication Date |
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| CN115780111A true CN115780111A (en) | 2023-03-14 |
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| CN202211369444.3A Pending CN115780111A (en) | 2022-11-03 | 2022-11-03 | Cable-integrated geotechnical centrifuge combined rotating arm structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891055A (en) * | 2010-07-09 | 2010-11-24 | 叶保国 | Frame type double-connected chain plate, chain links for double-connected delivery and chains thereof |
| CN102709072A (en) * | 2011-03-28 | 2012-10-03 | 上海电气集团股份有限公司 | Copper-aluminum composite bus of current-carrying conductor of medium-voltage isolation switch and preparation method thereof |
| CN109261381A (en) * | 2018-11-20 | 2019-01-25 | 中国工程物理研究院总体工程研究所 | A kind of pipelining structure applied to high speed geotechnical centrifuge |
| CN212328624U (en) * | 2020-05-13 | 2021-01-12 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge with small capacity and high G value |
| CN113941455A (en) * | 2021-10-13 | 2022-01-18 | 中国工程物理研究院总体工程研究所 | Novel pipeline support structure applied to high-speed geotechnical centrifuge |
-
2022
- 2022-11-03 CN CN202211369444.3A patent/CN115780111A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891055A (en) * | 2010-07-09 | 2010-11-24 | 叶保国 | Frame type double-connected chain plate, chain links for double-connected delivery and chains thereof |
| CN102709072A (en) * | 2011-03-28 | 2012-10-03 | 上海电气集团股份有限公司 | Copper-aluminum composite bus of current-carrying conductor of medium-voltage isolation switch and preparation method thereof |
| CN109261381A (en) * | 2018-11-20 | 2019-01-25 | 中国工程物理研究院总体工程研究所 | A kind of pipelining structure applied to high speed geotechnical centrifuge |
| CN212328624U (en) * | 2020-05-13 | 2021-01-12 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge with small capacity and high G value |
| CN113941455A (en) * | 2021-10-13 | 2022-01-18 | 中国工程物理研究院总体工程研究所 | Novel pipeline support structure applied to high-speed geotechnical centrifuge |
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