CN108081700B

CN108081700B - Carbon fiber sectional winding composite thick-wall cylinder

Info

Publication number: CN108081700B
Application number: CN201710774038.8A
Authority: CN
Inventors: 孙九霄; 陆野; 刘刚
Original assignee: Zhenjiang Chunhuan Sealing Materials Group Co ltd
Current assignee: Zhenjiang Chunhuan Sealing Materials Group Co ltd
Priority date: 2017-08-31
Filing date: 2017-08-31
Publication date: 2020-11-17
Anticipated expiration: 2037-08-31
Also published as: CN108081700A

Abstract

The invention provides a carbon fiber section-wound composite thick-wall cylinder which comprises a cylinder main body, wherein a plurality of composite material winding sections and metal composite sections are uniformly arranged on the cylinder main body in a staggered mode at intervals along the length direction of the cylinder main body, the composite material winding sections sequentially comprise a metal layer and a carbon fiber reinforced epoxy resin layer from inside to outside, a heat conducting layer is arranged in the carbon fiber reinforced epoxy resin layer, the heat conducting layer comprises a heat conducting part arranged in the carbon fiber reinforced epoxy resin layer and a heat conducting end connected with the heat conducting part, and the heat conducting end is integrally connected with the metal layer. According to the carbon fiber sectional winding composite material thick-wall cylinder, the heat conduction layer structure is designed, and the heat conduction layer is arranged in the carbon fiber reinforced epoxy resin layer, so that the heat dissipation efficiency of the inner wall is improved, and the service life of the pipe wall is prolonged.

Description

Carbon fiber sectional winding composite thick-wall cylinder

Technical Field

The invention relates to the field of mechanical manufacturing, in particular to a carbon fiber sectional winding composite thick-wall cylinder applied to the outer extension part of a pipe wall.

Background

As is well known, the fiber winding composite material has the advantages of high specific strength, high specific rigidity, corrosion resistance and the like, and is widely applied to the fields of aerospace, energy transmission, pressure vessels and the like. Among them, the carbon fiber composite material has the characteristics of general carbon materials, such as: the composite material has the advantages of friction resistance, electric conduction, heat conduction, corrosion resistance and the like, and also has excellent anti-fatigue and impact-resistant characteristics, particularly ultrahigh strength-to-weight ratio and hardness-to-weight ratio, so that the composite material is widely applied to the fields of aerospace and automobile industry. Carbon fiber composite materials have hitherto become an indispensable industrial material. In addition, in recent years, with the increasing prominence of the problem of thermal stress in engineering, cylindrical axisymmetric structures such as diesel engine pistons, machine tool spindles and the like all bear the double effects of thermal load and mechanical recombination at high frequency, and the thermal influence must be fully taken into consideration when stress calculation is carried out on the cylindrical axisymmetric structures.

However, the composite material has poor heat conductivity and low use temperature, and therefore, the problems of the tube wall temperature exceeding the allowable temperature of the composite material, the over-high temperature in the tube wall, the reduction of the service life, and the like are easily caused. Therefore, how to solve the problem of poor heat dissipation of the composite material layer is an urgent technical problem to be solved by those skilled in the art.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the invention aims to provide a carbon fiber section winding composite thick-wall cylinder. The specific technical scheme is as follows:

the utility model provides a carbon fiber segmentation winding combined material thick wall drum, includes the drum main part, the drum main part is followed its length direction even interval crisscross a plurality of combined material winding sections and the metal composite section of being equipped with, combined material winding section from interior to exterior includes metal level and carbon fiber reinforcement epoxy layer in proper order, be equipped with the heat-conducting layer in the carbon fiber reinforcement epoxy layer, the heat-conducting layer including set up at the intraformational heat conduction portion of carbon fiber reinforcement epoxy and with the heat conduction end that the heat conduction portion is connected, the heat conduction end with metal level body coupling.

According to the carbon fiber section winding composite material thick-wall cylinder provided by the invention, the heat conduction layer structure is designed, and the heat conduction layer is arranged in the carbon fiber reinforced epoxy resin layer, so that the heat dissipation efficiency of the inner wall is improved, and the service life of the pipe wall is prolonged.

According to an example of the present invention, the number of the heat conducting portions is plural, each of the heat conducting portions is a plate-shaped or columnar member, the cross section of the heat transfer end is circular, and the heat transfer end has a grid-shaped structure.

According to an example of the present invention, the carbon fiber reinforced epoxy resin layer is formed by immersing carbon fibers in a liquid resin and applying a tensile force to wind the carbon fibers onto the metal layer, the resin is a thermosetting resin or a thermoplastic resin, the thermosetting resin is one or a combination of a phenolic resin, an epoxy resin, a modified phenolic resin, a modified epoxy resin, a bismaleimide resin or a thermosetting polyimide resin, and the thermoplastic resin is one or a combination of a thermoplastic polyimide resin, a polyetherimide resin, a polysulfone resin or a polyester resin.

According to one example of the present invention, a plasticizer and/or a diluent is added to the resin.

According to an example of the present invention, the winding angle of the carbon fiber reinforced epoxy resin layer is 50 ° to 65 °.

According to one example of the invention, the carbon fiber reinforced epoxy resin layer is of a multilayer structure, and the thickness of a single layer is 0.3-0.5 mm.

According to an example of the invention, the heat conducting part and/or the heat conducting end is made of steel.

According to an example of the invention, when the heat conducting part is formed, the heat conducting part is heated and insulated at 900 ℃ for 40min, then quenched and cooled by water, then heated and insulated at 560 ℃ for 80min, then tempered and air-cooled, and then heat insulated at 84 ℃ for 40min, then water-cooled and sub-temperature quenched, and then tempered and air-cooled by heating and insulated at 560 ℃ for 80 min.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a carbon fiber segment-wound composite thick-walled cylinder according to the present embodiment;

FIG. 2 is a schematic cross-sectional view of another carbon fiber segment-wound composite thick-walled cylinder of the present embodiment;

fig. 3 is a schematic structural diagram of the heat dissipation layer in fig. 2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The carbon fiber segment-wound composite thick-walled cylinder according to the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-3, the carbon fiber section-wound composite thick-wall cylinder of the present embodiment includes a cylinder main body 1, the cylinder main body is provided with a plurality of composite material winding sections 2 and metal composite sections 3 at uniform intervals in a staggered manner along a length direction of the cylinder main body, the composite material winding sections 2 sequentially include a metal layer and a carbon fiber reinforced epoxy resin layer 6 from inside to outside, specifically, the metal layer is a chromium structure layer 4 and a steel structure layer 5, but not limited thereto, other metals or alloy materials can also be used as the metal layer of the present embodiment, the composite material winding section of the present embodiment is to arrange the carbon fiber reinforced epoxy resin layer at a certain winding angle on an outer layer of a steel structure, and the carbon fiber reinforced epoxy plastic is a composite material with good strength, rigidity and heat resistance, and has a small specific gravity and a large structural strength.

Specifically, in this embodiment, the carbon fiber reinforced epoxy resin layer is formed by immersing carbon fibers in a liquid resin and applying a tensile force to wind the carbon fibers on the metal layer, the resin is a thermosetting resin or a thermoplastic resin, the thermosetting resin is one or a combination of several of a phenolic resin, an epoxy resin, a modified phenolic resin, a modified epoxy resin, a bismaleimide resin or a thermosetting polyimide resin, and the thermoplastic resin is one or a combination of several of a thermoplastic polyimide resin, a polyetherimide resin, a polysulfone resin or a polyester resin. And a plasticizer and/or a diluent is added to the resin.

Under the condition that the outer diameter of the pipe wall is kept inconvenient, the thicker the wound composite material is, namely the thinner the metal layer of the inner layer is, the larger the stress value born by the inner wall is, the adverse effect is caused on the strength of the pipe wall, on the contrary, the thinner the wound composite material is, namely the thicker the metal layer of the inner layer is, the smaller the stress value born by the inner wall is, but the adverse effect is caused on the reduction of the weight of the pipe wall, therefore, the winding thickness of the selected proper composite material is also extremely important, therefore, the applicant obtains through a large number of experiments that the thickness of the carbon fiber reinforced epoxy resin layer is 6mm-10mm, the structural strength is ensured, the weight reduction purpose is achieved, the carbon fiber reinforced epoxy resin layer of the embodiment is favorable for being of a multilayer structure, the single-layer thickness is 0.3-0.

In addition, in the experiment, the applicant found that compared with the pure metal cylinder, the composite material cylinder with the outer layer wound with the composite material and the pure metal cylinder with the same outer diameter has a higher temperature in the composite material pipe wall technology than the pure metal cylinder at the same position, and the temperature in the composite material at the outer layer is lower than the temperature at the same position in the pure metal pipe wall, because of the low heat conductivity and the high specific heat of the composite material at the outer layer, the heat transfer plastic cloth is greatly reduced when reaching the composite material layer due to the low heat conductivity coefficient of the composite material at the outer layer, and the heat at the inner wall cannot be transferred, which shortens the service life of the pipe wall, so the applicant designed the heat conducting layer structure, as shown in fig. 3, the heat conducting layer 7 is arranged in the carbon fiber reinforced epoxy resin layer, the heat conducting layer 7 comprises a heat conducting part 8 integrally connected with the wound composite material and heat, the two heat transfer ends are respectively and integrally connected with the chromium structure layer and/or the steel structure layer of the metal composite section. More specifically, the number of the heat conducting parts is multiple, each heat conducting part is a plate-shaped or columnar piece, certainly, other shapes are also possible, the cross section of the heat conducting end is in a circular ring shape, the heat conducting end is in a grid-shaped structure, the grid-shaped structure can be a regular grid or an irregular grid, after the metal inner wall is machined and formed, the heat conducting layer 7 is connected with the metal inner wall (namely metal layers such as a steel structure layer and a chromium structure layer), then the carbon fiber reinforced epoxy resin layer is wound, the heat conducting layer 7 is arranged in the wound carbon fiber reinforced epoxy resin layer, and the heat conducting part 8 transmits the heat of the metal inner wall to pure metal sections on two sides of the composite material winding section through the heat conducting end to dissipate the heat. The material of the heat conducting portion of the present embodiment is preferably steel, but other materials capable of achieving the use strength and the heat conducting performance are within the scope of the present invention.

Because the strength of the heat conduction layer is lower than that of the inner wall and the composite material layer due to the structure of the heat conduction layer, in order to ensure the structural strength of the heat conduction layer, the heat conduction part is heated at 900 ℃ and insulated for 40min before quenching and water cooling, then is heated at 560 ℃ and insulated for 80min before tempering and air cooling, and then is subjected to water cooling and subwarm quenching after being insulated for 40min at 84 ℃, and then is subjected to tempering and air cooling treatment at 560 ℃ and insulated for 80min, so that the heat conduction layer can obtain the best comprehensive mechanical property, the hardness reaches 32.9HRC, the yield strength is 913MPa, and the transverse impact absorption energy is 94.3J.

In addition, in this embodiment, a titanium alloy structural layer (not shown) may be further disposed between the steel structural layer and the chromium structural layer, the titanium alloy is an alloy formed by adding other elements to titanium, and the titanium alloy has the characteristics of high strength, good corrosion resistance, high heat resistance, and the like, and the density of the titanium alloy is generally (about 4.51 g/cc), which is only 60% of that of steel, so as to further realize a lightweight pipe wall structure.

In addition, because the cylinder is mainly stressed in the circumferential direction, the winding angle of the outer layer composite material has a crucial influence on the strength of the cylinder. In the simulation experiment process of the applicant, the amplitude of the reduction of the radial displacement of the inner wall is large when the winding angle of the composite material layer is from 30 degrees to 60 degrees, and the amplitude of the reduction of the radial displacement of the inner wall is large when the winding angle is from 30 degrees to 60 degrees, so that the structural deformation resistance is strongest when the winding angle is about 60 degrees, and therefore, the applicant analyzes the progressive damage process of the composite material to obtain that the inner wall material has the strongest internal pressure resistance when the winding angle is 50-65 degrees.

In summary, according to the carbon fiber segmented winding composite thick-walled cylinder and the pipe wall provided by the invention, the carbon fiber reinforced epoxy plastic is used as the segmented winding layer, the carbon fiber reinforced epoxy plastic has certain structural strength, rigidity and heat resistance, is light in weight and has a certain heat dissipation function, the adhesion of the carbon fiber reinforced epoxy plastic is improved by oxidation and whisker treatment, the problem of anisotropy is solved by a carbon fiber weaving method, the weight of the pipe wall is greatly reduced, the winding angle of the carbon fiber reinforced epoxy resin layer is designed to be 50-65 degrees, the structural strength of the composite material layer is further improved, the lightweight of the pipe wall is achieved while the structural strength of the pipe wall is ensured, and the problems of poor heat dissipation performance and short service life of the composite laminated pipe wall in the prior art are solved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a carbon fiber segmentation winding combined material thick wall drum, its characterized in that, includes the drum main part, the drum main part is equipped with a plurality of combined material winding sections and metal composite section along its length direction even interval is crisscross, combined material winding section from interior to exterior includes the metal level in proper order and passes through carbon fiber reinforcement epoxy layer, be equipped with the heat-conducting layer in the carbon fiber reinforcement epoxy layer, the heat-conducting layer including set up at the intraformational heat conduction portion of carbon fiber reinforcement epoxy and with the heat conduction end that the heat conduction portion is connected, the heat conduction end with metal level body coupling.

2. The carbon fiber section-wound composite thick-wall cylinder as claimed in claim 1, wherein the number of the heat conducting parts is multiple, each heat conducting part is a plate or a column, the cross section of the heat transfer end is circular, and the heat transfer end is of a grid structure.

3. The carbon fiber segmented winding composite thick-walled cylinder according to claim 1, wherein the carbon fiber reinforced epoxy resin layer is formed by soaking carbon fibers in liquid resin and applying tension to wind the carbon fibers on the metal layer, the resin is thermosetting resin or thermoplastic resin, the thermosetting resin is one or a combination of phenolic resin, epoxy resin, modified phenolic resin, modified epoxy resin, bismaleimide resin or thermosetting polyimide resin, and the thermoplastic resin is one or a combination of thermoplastic polyimide resin, polyetherimide resin, polysulfone resin or polyester resin.

4. The carbon fiber section-wound composite thick-walled cylinder according to claim 3, wherein a plasticizer and/or a diluent is added to the resin.

5. The carbon fiber segmented winding composite thick-walled cylinder as claimed in claim 1, wherein the winding angle of the carbon fiber reinforced epoxy resin layer is 50-65 °.

6. The carbon fiber segmented winding composite thick-wall cylinder as claimed in claim 1, wherein the carbon fiber reinforced epoxy resin layer is of a multilayer structure, and the thickness of a single layer is 0.3-0.5 mm.

7. The carbon fiber section-wound composite thick-walled cylinder according to claim 1, wherein the heat conducting part and/or the heat conducting end is made of steel.

8. The carbon fiber section-wound composite thick-walled cylinder according to claim 1, wherein the heat conducting part is formed by quenching and water cooling after heating and heat preservation at 900 ℃ for 40min, tempering and air cooling after heating and heat preservation at 560 ℃, water cooling and sub-temperature quenching after heat preservation at 84 ℃ for 40min, and tempering and air cooling after heating and heat preservation at 560 ℃ for 80 min.