CN110947527A - Structure for reinforcing signal data pipeline of supergravity centrifugal machine - Google Patents
Structure for reinforcing signal data pipeline of supergravity centrifugal machine Download PDFInfo
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- CN110947527A CN110947527A CN201911310314.0A CN201911310314A CN110947527A CN 110947527 A CN110947527 A CN 110947527A CN 201911310314 A CN201911310314 A CN 201911310314A CN 110947527 A CN110947527 A CN 110947527A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention discloses a structure for reinforcing a signal data pipeline of a hypergravity centrifuge. The reinforced structure is installed on the high-speed rotating arm of the hypergravity centrifuge, the reinforced structure is installed on the top surface of the high-speed rotating arm, various fixed pipelines are arranged inside the reinforced structure, the reinforced structure comprises structural units which are symmetrically arranged on the upper side and the lower side of various pipelines and reinforced carbon fiber composite layers which are arranged on the structural units, the structural units on the upper side and the lower side are wrapped on the pipelines respectively, the reinforced carbon fiber composite layers are filled and leveled by the reinforced carbon fiber composite layers at the inner concave parts of the structural units between every two adjacent pipelines, and the structural units and the reinforced carbon fiber composite layers are formed by stacking different multi-layer carbon fiber composite layers. The signal data line reinforcing structure can overcome huge pulling force caused by high-speed rotation of the hypergravity centrifuge in the using process, and prevent the signal data line from being thrown out and broken under the high-speed operation of the centrifuge. The signal data line is fixed firmly and has simple structure.
Description
Technical Field
The invention relates to an internal structure of a hypergravity centrifuge in the field of structural reinforcement structure design under a hypergravity centrifugal field, in particular to a signal data line reinforcement structure design of a hypergravity centrifugal field.
Background
The supergravity centrifuge is an important experimental device for time-lapse and scale-reduction experiments for researching problems of geological process evolution, soil pollutant migration, deep-sea engineering catastrophe and the like, however, under the supergravity environment, huge centrifugal force acts on inlet and outlet pipelines such as sensors, data lines, water vapor and the like to bear huge centrifugal force, and the huge centrifugal force is very easy to cause the signal data lines and the material inlet and outlet pipelines to be pulled apart and broken after being fixed. Therefore, in order to ensure that the signal data line and the material conveying pipeline can be normally used in the process of measuring the high gravity field, the structure of the signal data line and the material conveying pipeline needs to be reinforced and fixed.
Disclosure of Invention
The invention aims to overcome the defects that a signal data wire is difficult to fix in a supergravity field and is easy to break and damage in the using process, and designs a fixing and reinforcing structure of the signal data wire, so that the reinforcing structure containing the signal data wire can bear large tensile force in the using process, and the signal data wire is prevented from being thrown out and broken under the high-speed operation of a supergravity centrifugal machine. The method is suitable for the high-gravity centrifugal machine and other equipment running at high speed.
The technical scheme adopted by the invention is as follows:
the reinforcing structure is arranged on the high-speed rotating arm of the supergravity centrifugal machine, the reinforcing structure is fixedly positioned on the top surface of the high-speed rotating arm through the inner hexagon screw and the anti-loosening gasket, and the lower surface of the reinforcing structure is bonded on the top surface of the high-speed rotating arm through the adhesive; the reinforced structure is internally provided with various fixed pipelines, one ends of the various pipelines enter the supergravity experiment chamber through pipeline in-chamber joints to be connected with various instruments, the other ends of the various pipelines extend to a central rotating shaft of the supergravity centrifugal machine and penetrate into a hollow cavity of the central rotating shaft to be connected with a slip ring mechanism on the central rotating shaft, and the other ends of the various pipelines are connected to a pipeline leading-out joint after passing through the slip ring mechanism and are led out of a centrifugal chamber of the supergravity centrifugal machine.
The various pipelines comprise metal pipes, conducting wires, optical fiber data lines, non-metal pipes, shielding insulation pipelines and sensor leads.
The reinforced structure comprises carbon fiber composite material layers and reinforced carbon fiber leveling layers which are symmetrically arranged on the upper side and the lower side of each pipeline respectively, the carbon fiber composite material layers and the reinforced carbon fiber leveling layers on the upper side and the lower side of each pipeline are wrapped on the upper surface and the lower surface of each pipeline respectively, and the inner concave part of a structural unit between every two adjacent pipelines is filled by the reinforced carbon fiber leveling layers, so that a sandwich composite reinforced sandwich structure is formed; the composite reinforced sandwich structure is formed by laminating five or more carbon fiber composite material layers in different fiber directions, wherein a single carbon fiber composite material layer is formed by embedding a plurality of reinforced carbon fibers in an epoxy resin matrix at intervals in parallel, the reinforced carbon fibers in the five carbon fiber composite material layers are arranged in different directions in parallel, and the parallel arrangement directions of the reinforced carbon fibers in the five structural units at the upper side are respectively two continuous directions from bottom to top, wherein the two continuous directions are perpendicular to the pipeline direction, parallel to the pipeline direction, and the included angle between the two continuous directions and the pipeline direction is 60 degrees and-60 degrees; the reinforced carbon fiber leveling layer is also formed by embedding a plurality of reinforced carbon fibers in an epoxy resin matrix at intervals in parallel, and the parallel arrangement direction of the reinforced carbon fibers of the reinforced carbon fiber leveling layer is parallel to the pipeline direction.
The carbon fiber composite material layer is replaced by reinforced glass fiber, reinforced aramid fiber or boron fiber and the like.
The epoxy resin matrix is replaced by bismaleimide resin, phenolic resin and the like.
The invention has the beneficial effects that:
according to the signal data wire reinforcing and fixing structure, the signal data wire is embedded in the middle of the carbon fiber layer, and when the rotating shaft drives the rotating arm to rotate at a high speed, the huge centrifugal force borne by the signal data wire is distributed on the carbon fiber layer and almost all borne by the carbon fiber layer. Because the mass of the carbon fiber composite material is very small, the centrifugal force is also very small, and the carbon fiber composite material has extremely high axial tensile strength, so that the carbon fiber layer can overcome huge tensile force caused by the centrifugal force.
In consideration of the Poisson effect, the carbon fiber layer is designed to be laid at multiple angles, and the tensile strength of the signal data line reinforcing structure in different directions can be enhanced. The signal data line is firmly fixed under the reinforcing structure, and the structure is simple.
Drawings
FIG. 1 is a front view of the reinforcement structure of the present invention.
Figure 2 is a top view of the present reinforcing structure.
Figure 3 is a cross-sectional view of the present reinforcing structure.
FIG. 4 is a fiber lay-up diagram of an embodiment of the present reinforcement structure.
In the figure: 1. the test chamber comprises a supergravity test chamber body, 2 pipeline in-chamber joints, 3 reinforcing structures, 4 high-speed rotating arms, 5 bearing systems, 6 sliding ring mechanisms, 7 pipeline leading-out joints, 8 central rotating shafts, 9 reinforcing carbon fiber flattening layers, 10 metal tubes, 11 conducting wires, 12 optical fiber data lines, 13 nonmetal tubes, 14 shielding insulating pipelines, 15 sensor leads, 16 hexagon socket head screws, 17 locking gaskets, 18 various pipelines, 19 splines, 20 carbon fiber composite material layers, 21 reinforcing carbon fibers, 22 epoxy resin substrates.
Detailed Description
The present invention will be further described with reference to the following drawings and examples, but the present invention is not limited thereto.
As shown in fig. 1 and fig. 2, the supergravity centrifuge comprises a high-speed rotating arm 4, a bearing system 5, supergravity experiment chambers 1 and a central rotating shaft 8, wherein the two supergravity experiment chambers 1 are hung at the two outer ends of the high-speed rotating arm 4, the middle part of the high-speed rotating arm 4 is coaxially connected with the central rotating shaft 8 through a spline 19, and the central rotating shaft 8 is arranged on the bearing system 5, so that a rotor system of the supergravity centrifuge is formed; the reinforcing structure 3 is arranged on the high-speed rotating arm 4 of the supergravity centrifugal machine, the reinforcing structure 3 is fixedly positioned on the top surface of the high-speed rotating arm 4 through a hexagon socket head cap screw 16 and a locking gasket 17, and the lower surface of the reinforcing structure 3 is bonded on the top surface of the high-speed rotating arm 4 through an adhesive.
All kinds of pipelines 18 are fixedly arranged inside the reinforcing structure 3, the whole of all kinds of pipelines 18 is arranged in the middle of the reinforcing structure 3 to be reinforced, one end of all kinds of pipelines 18 enters the supergravity experiment chamber 1 through the pipeline in-chamber joint 2 to be connected with all instruments, the other end of all kinds of pipelines 18 extends towards the central rotating shaft 8 of the supergravity centrifugal machine, penetrates into the hollow cavity of the central rotating shaft 8 and is connected with the slip ring mechanism 6 on the central rotating shaft 8, the pipelines are connected to the pipeline leading-out joint 7 after passing through the slip ring mechanism 6 and are led out of the centrifugal chamber of the supergravity centrifugal machine, and the pipeline leading-out joint 7 is positioned at the.
In specific implementation, the slip ring mechanism 6 may specifically include an outer slip ring and an inner slip ring, the outer slip ring may be fixed to an inner wall of a centrifugal chamber of the supergravity centrifuge, and the inner slip ring may be fixed to an outer wall of the central rotating shaft.
As shown in fig. 3, the various types of pipelines 18 include a metal pipe 10, a conductor 11, an optical fiber type data line 12, a non-metal pipe 13, a shield insulation type pipeline 14, and a sensor lead 15.
As shown in fig. 4, the reinforcing structure 3 includes structural units symmetrically arranged on the upper and lower sides of each pipeline 18 and a reinforcing carbon fiber composite layer 9 outside the structural units, the structural units on the upper and lower sides are wrapped on and under the pipelines 18 respectively, and the concave part formed by the structural units between two adjacent pipelines 18 is filled by the reinforcing carbon fiber composite layer 9, so that the outer side surface of the reinforcing carbon fiber composite layer 9 after filling is flush with the outer side surface of the structural units, thereby forming a sandwich composite reinforcing sandwich structure.
The above-mentioned structural unit is formed by five layers of carbon fibers or more layers with different fiber arrangements, the present embodiment adopts five layers of composite material layers 20 to be laminated, a single-layer carbon fiber composite material layer 20 is formed by embedding a plurality of reinforced carbon fibers 21 in an epoxy resin matrix 22 at parallel intervals, the reinforced carbon fibers 21 in the five layers of carbon fiber composite material layers 20 are arranged in different directions in parallel to form a multi-angle laying, the reinforced carbon fibers 21 in the five layers of structural unit at the upper side are respectively two continuous parallel arrangement directions from bottom to top along the direction perpendicular to the pipeline 18, along the direction parallel to the pipeline 18, the included angle between the two continuous parallel arrangement directions and the pipeline 18 is 60 degrees and-60 degrees, the arrangement angle is 0 DEG in the direction perpendicular to the pipeline 18, forming arrangement angles of 0 DEG, 90 DEG, 30 DEG and-30 DEG, and the five-layer structural units on the lower side and the five-layer structural units on the upper side are symmetrical about the horizontal center line of the reinforcing structure 3.
The reinforced carbon fiber composite layer 9 is also formed by embedding a plurality of reinforced carbon fibers 21 in the epoxy resin matrix 22 in parallel at intervals, and the direction of parallel arrangement of the reinforced carbon fibers 21 of the reinforced carbon fiber composite layer 9 is parallel to the pipeline 18 direction.
In specific implementation, various pipelines 18 are arranged in the middle of the upper and lower side structural units at equal intervals, and the reinforced carbon fiber composite layer 9 is connected with the high-speed rotating arm 4 through the socket head cap screws 16 and adhesives.
The case of the embodiment of the present invention is as follows:
referring to FIG. 1, a 1500g hypergravity centrifuge has an indoor radius of 9.7m, a rotor arm radius of 4.5m, a rotor maximum linear velocity of 300m/s, and a copper wire (density of copper rho) with a diameter of 3mm coated in a carbon fiber layer1Is 8.96 multiplied by 103kg/m3) As a pipeline, the mass m of copper wire1Comprises the following steps:
m1＝ρ1V1＝8.96×10-3×π×1.52×4500×10-3＝0.285kg
wherein, V1Representing the volume of a single copper wire on the boom.
The copper wire is subjected to a centrifugal force F1The size is as follows:
r1represents half of the radius of the rotating arm of the centrifuge, m;
representing the rotational angular velocity of the centrifuge, rad/s; v represents the centrifuge rotor linear velocity, m/s; r represents centrifuge bowl radius, m.
The tensile stress sigma on the copper wire1The size is as follows:
wherein A is1Denotes the transverse cross-sectional area, mm, of a single copper wire2。
From the calculation results, the tensile stress on the copper wire has already significantly exceeded the allowable stress (the yield strength limit of brass is 200MPa-300MPa), and therefore the copper wire must be reinforced.
The reinforced structure of specific implementation is divided into structural units symmetrically arranged on the upper side and the lower side of each pipeline 18 and reinforced carbon fiber composite layers 9 outside the structural units, the structural units on the upper side and the lower side are wrapped on the pipelines 18 respectively, and the concave parts formed by the structural units between every two adjacent pipelines 18 are filled and leveled by the reinforced carbon fiber composite layers 9, so that the reinforced structure integrally forms a rectangular section, and a sandwich composite reinforced sandwich structure is formed.
The two structural units comprise 10 carbon fiber composite material layers 20 in total, each layer is 0.125mm thick, and each structural unit sequentially comprises the following components from the inner side close to the pipeline to the outer side along the thickness direction: laying 2 layers at 0 degree, laying 1 layer at 90 degree, laying 1 layer at 30 degree, laying 1 layer at 0 degree vertical to the direction of the pipeline 18, and laying layers symmetrically.
The density of the carbon fiber laminate is about 1.5 multiplied by 103kg/m3Length 2440mm and width 800mm, the mass m of carbon fiber laying layer2Comprises the following steps:
m2＝ρ2V2＝1.5×10-3×2440×800×1.25×10-3＝3.66kg
where ρ is2Denotes the density of the carbon fiber laminate in kg/m3；V2Denotes the volume, m, of the carbon fiber laminate3。
The centrifugal force F generated by the carbon fiber layer2The size is as follows:
thus, the total centrifugal force F has the magnitude:
F＝F1+F2＝2850+36603.7＝39453.7N
since the copper wire is completely covered with the carbon fiber reinforced material, it is considered that the centrifugal force is entirely borne by the carbon fiber layer, and the cross-sectional area a of the carbon fiber which bears the tensile force in the longitudinal direction is the cross-sectional area a of the carbon fiber2The size is as follows:
A2＝2×[0.125×800×2+0.125×800×cos30°×2]＝746.4mm2
the tensile stress on the carbon fiber layer is as follows:
the value is far less than 2500MPa of longitudinal tensile strength of the carbon fiber composite material, so that the designed carbon fiber reinforced structure meets the strength requirement.
The comparative example was carried out as follows:
the two structural units comprise 10 carbon fiber composite material layers 20 in total, each layer is 0.125mm thick, and each structural unit sequentially comprises the following components from the inner side close to the pipeline to the outer side along the thickness direction: laying 1 layer at 0 degree, laying 1 layer at 90 degree, laying 1 layer at 0 degree, laying 1 layer at 90 degree and laying 1 layer at 0 degree. 0 deg. is perpendicular to the direction of the pipeline 18, and is symmetrically layered. The centrifugal force is calculated as above.
In this case, the cross-sectional area A of the carbon fiber that takes up the tensile force in the longitudinal direction3The size is as follows:
A3＝2×(0.125×800×3)＝600mm2
the tensile stress on the carbon fiber layer is as follows:
it can be seen that in this case, the longitudinal tensile stress borne by the carbon fiber layer is greater than the calculation result of the embodiment, so that the low-angle laying method should be selected as much as possible under the condition of the same number of layers.
Therefore, the signal data wire reinforcing structure can overcome huge pulling force caused by high-speed rotation of the supergravity centrifuge in the using process, and prevent the signal data wire from being thrown out and pulled apart under the high-speed operation of the centrifuge. The signal data line is fixed firmly, simple structure has filled the trade blank, has outstanding technological effect.
In addition to the above embodiments, the present invention may have other embodiments, such as changing the shape, density, etc. of the pipe, changing the angle of laying the carbon fiber layers, changing the number of the laid layers, etc. to reinforce. All technical solutions formed by equivalent replacement fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a be used for structure that hypergravity centrifuge signal data pipeline strengthened which characterized in that: the reinforcing structure (3) is arranged on the high-speed rotating arm (4) of the supergravity centrifugal machine, the reinforcing structure (3) is fixedly positioned and arranged on the top surface of the high-speed rotating arm (4) through an inner hexagon screw (16) and a check washer (17), and meanwhile, the lower surface of the reinforcing structure (3) is bonded on the top surface of the high-speed rotating arm (4) through an adhesive; all kinds of pipelines (18) are fixedly arranged inside the reinforcing structure (3), one ends of all kinds of pipelines (18) enter the supergravity experiment chamber (1) through the pipeline cabin-entering joint (2) to be connected with all instruments, the other ends of all kinds of pipelines (18) extend towards the central rotating shaft (8) of the supergravity centrifugal machine and penetrate into the hollow cavity of the central rotating shaft (8) to be connected with the slip ring mechanism (6) on the central rotating shaft (8), and the other ends of all kinds of pipelines are connected to the pipeline leading-out joint (7) after passing through the slip ring mechanism (6) to be led out of the centrifugal chamber of the supergravity centrifugal machine.
2. The structure for reinforcing signal data pipelines of a supergravity centrifuge as claimed in claim 1, wherein: the various pipelines (18) comprise metal pipes (10), conducting wires (11), optical fiber data lines (12), non-metal pipes (13), shielding and insulating pipelines (14) and sensor leads (15).
3. The structure for reinforcing signal data pipelines of a supergravity centrifuge as claimed in claim 1, wherein: the reinforced structure (3) comprises carbon fiber composite material layers (20) and reinforced carbon fiber flattening layers (9) which are symmetrically arranged on the upper side and the lower side of each pipeline (18), the carbon fiber composite material layers (20) and the reinforced carbon fiber flattening layers (9) on the upper side and the lower side are wrapped on the upper surfaces and the lower surfaces of the pipelines (18), and the inner concave part of a structural unit between every two adjacent pipelines (18) is filled and flattened by the reinforced carbon fiber flattening layers (9), so that a sandwich composite reinforced sandwich structure is formed; the composite reinforced sandwich structure is formed by laminating five or more carbon fiber composite material layers (20) with different fiber directions, wherein a single-layer carbon fiber composite material layer (20) is formed by embedding a plurality of reinforcing carbon fibers (21) in an epoxy resin matrix (22) at intervals in parallel, the parallel arrangement directions of the reinforcing carbon fibers (21) in the five carbon fiber composite material layers (20) are different, the parallel arrangement directions of the reinforcing carbon fibers (21) in the five structural units at the upper side are respectively two continuous directions from bottom to top, and the included angles between the two continuous directions and the pipeline (18) direction are 60 degrees and-60 degrees; the reinforcing carbon fiber leveling layer (9) is also formed by embedding a plurality of reinforcing carbon fibers (21) in an epoxy resin matrix (22) in parallel at intervals, and the parallel arrangement direction of the reinforcing carbon fibers (21) of the reinforcing carbon fiber leveling layer (9) is parallel to the direction of the pipeline (18).
4. The structure for reinforcing signal data pipelines of a supergravity centrifuge as claimed in claim 3, wherein: the carbon fiber composite material layer (20) is replaced by reinforced glass fiber, reinforced aramid fiber or boron fiber.
5. The structure for reinforcing signal data pipelines of a supergravity centrifuge as claimed in claim 3, wherein: the epoxy resin matrix (22) is replaced by bismaleimide resin, phenolic resin and the like.
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| 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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