Preparation method of carbon fiber composite shell for shock absorber and shock absorber

Abstract

The invention discloses a preparation method of a carbon fiber composite material shell for a shock absorber, and the preparation method comprises the following steps: step 1, preparing a polydopamine modified layer: immersing a sizing agent-removed carbon fiber cloth into a dopamine mixed solution to obtain a polydopamine grafted and modified carbon fiber; 2, preparing a zinc oxide seed crystal layer: adding the polydopamine grafted and modified carbon fiber obtained in the step 1 into a zinc oxide seed crystal solution to obtain carbon fiber fully coated by the zinc oxide seed crystal layer; the energy recovery mechanism is integrated in the magnetic spring, the excellent damping performance of the shock absorber is reserved, the brand new energy recovery function of the shock absorber is achieved, the energy recovery efficiency is improved through the innovative design, the functionality of the magnetic shock absorber is enhanced, and the energy recovery effect of the shock absorber is improved. And therefore, the device plays a more important role in an automobile suspension system.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile shock absorbers, and in particular relates to a method for preparing a carbon fiber composite material shell for a shock absorber and a shock absorber. Background Art

[0002] With the rapid development of my country's automotive industry, the demand for high-performance shock absorbers is growing. Although traditional metal shock absorbers have been widely used in history, they have many limitations, including heavy weight, low energy efficiency, high noise and limited service life. In order to meet these challenges, the industry has been seeking lighter, stronger and more durable materials, as well as more advanced vibration reduction technologies.

[0003] Traditional hydraulic shock absorbers are of fluid damping type, consisting of a piston with a flow hole and a cylinder that matches it. The piston is connected to the damped body through a rod, and the cylinder is filled with fluid (oil, gas or other fluid media). When the piston moves, the fluid generates a damping force on the piston through the flow hole to achieve vibration reduction. However, the damping force variation of this shock absorber is limited, and it is difficult to apply to high-frequency vibrations, and the fluid is prone to leakage.

[0004] The current explosive growth of automobiles has caused a series of problems such as huge energy consumption, serious waste of resources, and increased environmental pollution. In order to cope with the increasingly tense energy and environmental problems, it is particularly important to improve energy efficiency and green coordinated development, which has also promoted the continuous progress of energy recovery technology. At present, there are devices for recovering the vibration energy of automobile suspension, energy recovery in the form of hydraulic energy storage, and energy recovery in the form of electromagnetic induction coils. The inventor found that the technology for energy recovery based on magnetic springs has not yet been involved.

[0005] Due to the particularity of the magnetic spring, the inventors found that most of the existing outer sleeves equipped with magnetic springs have weak magnetic isolation capabilities. The magnetic spring is easily disturbed by the external magnetic field when in use, which affects the vibration reduction effect.

[0006] After consulting technical manuals in related fields and conducting experiments, the inventor(s) discovered that carbon fiber reinforced materials have high strength, light weight and excellent magnetic isolation capabilities. However, how to use carbon fiber reinforced materials as installation carriers for magnetic springs and how to achieve energy recovery on magnetic springs have become urgent issues to be solved. Summary of the invention

[0007] In order to solve the above problems, the present invention proposes a method for preparing a carbon fiber composite material shell for a shock absorber and a shock absorber.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows: a method for preparing a carbon fiber composite material shell for a shock absorber, the preparation method steps are as follows:

[0009] Step 1: preparing a polydopamine modified layer: immersing the carbon fiber cloth from which the sizing agent has been removed into a dopamine mixed solution to obtain a carbon fiber grafted and modified with polydopamine;

[0010] Step 2: preparing a zinc oxide seed layer: adding the carbon fiber modified by grafting of polydopamine obtained in step 1 to a zinc oxide seed solution to obtain a carbon fiber fully coated with a zinc oxide seed layer;

[0011] Step 3: preparing zinc oxide nanowires: adding the carbon fiber coated with the zinc oxide seed crystals obtained in step 2 into a zinc oxide growth solution to obtain a carbon fiber cloth with zinc oxide nanowires grown on the surface;

[0012] Step 4: preparing a carbon nanotube composite layer: fixing the carbon fiber cloth of zinc oxide nanowires obtained in step 3 on a stainless steel filter screen, and placing it at the exhaust gas end of a tubular furnace to collect carbon nanotubes, and filtering and depositing them to obtain zinc oxide-modified carbon fibers with carbon nanotubes deposited on the surface;

[0013] Step 5, curing and demoulding: placing the obtained zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface into a vacuum mold, injecting resin into the vacuum mold for curing; demoulding the zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface after curing;

[0014] Step 6. Post-processing: Polish the zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface after demolding to remove excess resin and corners to form the final shell shape.

[0015] Furthermore, the dopamine mixed solution in step 1 is prepared by mixing dopamine hydrochloride, tris(hydroxymethyl)aminomethane) and anhydrous ethanol.

[0016] Furthermore, the zinc oxide seed crystal solution in step 2 is prepared by mixing zinc acetate dihydrate and isopropyl alcohol.

[0017] Furthermore, the zinc oxide growth solution in step 3 is prepared by uniformly mixing zinc nitrate hexahydrate and an aqueous solution of hexamethylenetetramine, and then adjusting the pH value of the polyethyleneimine solution.

[0018] Furthermore, the carbon nanotube film attached to the outside of the carbon fiber in step 4 is prepared by a floating catalytic chemical vapor deposition method.

[0019] A shock absorber, comprising a shell made by the method for preparing a carbon fiber composite material shell, and further comprising:

[0020] Working cylinder;

[0021] An energy recovery mechanism, the energy recovery mechanism is installed at the upper end of the working cylinder;

[0022] A magnetic spring, wherein the magnetic spring is mounted at the lower end of the working cylinder;

[0023] The magnetic spring comprises a shell, a first magnet, a second magnet, a movable magnet and a piston rod, wherein the first magnet is mounted on the top end of the shell, the second magnet is mounted on the bottom end of the shell, and the movable magnet is mounted on the piston rod and moves between the first magnet and the second magnet through the piston rod;

[0024] The piston rod passes through the working cylinder, and in the process of the piston rod driving the moving magnet to move, the piston rod drives the energy recovery mechanism to move synchronously, so that the energy recovery mechanism recovers energy.

[0025] Furthermore, the shell is a barrel-shaped structure, and an end cover is installed at the opening of the shell; and a dust cover is installed at the end cover.

[0026] Furthermore, a connecting ring is installed at the bottom of the shell.

[0027] Further, the energy recovery mechanism comprises a first bevel gear, a second bevel gear and an energy recovery motor coaxially mounted in the working cylinder; the first bevel gear and the second bevel gear are arranged opposite to each other, the energy recovery motor is coaxially mounted with a third bevel gear, and the third bevel gear is meshed with the first bevel gear and the second bevel gear;

[0028] The first bevel gear and the second bevel gear are provided with through internal screw holes along their axes, and the outer edge surface of the piston rod is provided with external threads matching the internal screw holes of the first bevel gear and the second bevel gear; the piston rod is threadedly matched with the first bevel gear and the second bevel gear.

[0029] Furthermore, the first bevel gear, the second bevel gear and the third bevel gear are all mounted on the working cylinder via ball bearings.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) In the design innovation of the shock absorber, the magnetic spring is used to replace the traditional hydraulic shock absorber, realizing the contactless transmission of torque and effectively eliminating the leakage problem of the shock absorber shaft seal. This innovative design not only avoids the impact and vibration that may occur in the operation of the traditional hydraulic shock absorber, thereby reducing noise, but also the small size and lightweight characteristics of the magnetic spring make the overall design more compact, saving space and improving the fuel economy and dynamic performance of the vehicle.

[0032] (2) In order to ensure that the magnetic spring can work stably in various environments, its shell is made of carbon fiber reinforced composite material. This material not only has excellent magnetic field isolation performance, effectively protecting the magnetic spring from interference from external magnetic fields, but also significantly reduces the weight of the shock absorber due to its low density, thereby improving fuel efficiency and vehicle dynamic performance. In addition, the excellent corrosion resistance of carbon fiber reinforced composite materials enables it to maintain long-term durability even in harsh environments, extending the service life of the product. These characteristics together ensure that the shock absorber can provide reliable and long-lasting performance under various working conditions.

[0033] (3) The present invention integrates the energy recovery mechanism into the magnetic spring, which not only retains the excellent damping performance of the shock absorber, but also gives it a new function of recovering energy. This innovative design not only improves the efficiency of energy recovery, but also enhances the functionality of the magnetic shock absorber, allowing it to play a more important role in the automobile suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a cross-sectional view of the shock absorber in the present application document;

[0035] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0036] Figure 3 is a cross-sectional view of a carbon fiber composite material shell in the present application document;

[0037] Figure 4 It is a process flow chart of the preparation of carbon fiber composite material shell in this application document.

[0038] In the figure: piston rod 1; flange 2; working cylinder 3; first ball bearing 4; first bevel gear 5; third ball bearing 6; third bevel gear 7; second ball bearing 8; second bevel gear 9; energy recovery motor 10; dust cover 11; end cover 12; first magnet 13; moving magnet 14; second magnet 15; housing 16; connecting ring 17; carbon fiber layer 41; zinc oxide coating layer 42; carbon nanotube film layer 43; epoxy resin layer 44. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1-Figure 4As shown, the technical solution adopted by the present invention is as follows: This embodiment provides a method for preparing a carbon fiber composite material shell for a shock absorber; the steps of the preparation method are as follows:

[0041] Step 1: preparing a polydopamine modified layer: immersing the carbon fiber cloth from which the sizing agent has been removed into a dopamine mixed solution to obtain a carbon fiber grafted and modified with polydopamine;

[0042] Step 2: preparing a zinc oxide seed layer: adding the carbon fiber modified by grafting of polydopamine obtained in step 1 to a zinc oxide seed solution to obtain a carbon fiber fully coated with a zinc oxide seed layer;

[0043] Step 3: preparing zinc oxide nanowires: adding the carbon fiber coated with the zinc oxide seed crystals obtained in step 2 into a zinc oxide growth solution to obtain a carbon fiber cloth with zinc oxide nanowires grown on the surface;

[0044] Step 4: preparing a carbon nanotube composite layer: fixing the carbon fiber cloth of zinc oxide nanowires obtained in step 3 on a stainless steel filter screen, and placing it at the exhaust gas end of a tubular furnace to collect carbon nanotubes, and filtering and depositing them to obtain zinc oxide-modified carbon fibers with carbon nanotubes deposited on the surface;

[0045] Step 5, curing and demoulding: placing the obtained zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface into a vacuum mold, injecting resin into the vacuum mold for curing; demoulding the zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface after curing;

[0046] Step 6, post-processing: polishing the zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface after demolding, removing excess resin and corners, and forming the final shell 16 shape.

[0047] In another embodiment, the dopamine mixed solution in step 1 is prepared by mixing dopamine hydrochloride, tris(hydroxymethyl)aminomethane) and anhydrous ethanol.

[0048] In another embodiment, the zinc oxide seed crystal solution in step 2 is prepared by mixing zinc acetate dihydrate and isopropyl alcohol.

[0049] In another embodiment, the zinc oxide growth solution in step 3 is prepared by uniformly mixing zinc nitrate hexahydrate and a hexamethylenetetramine aqueous solution, and then adjusting the pH value of the solution with polyethyleneimine.

[0050] In another embodiment, the carbon nanotube film attached to the outside of the carbon fiber in step 4 is prepared by a floating catalytic chemical vapor deposition method.

[0051] In another embodiment, the specific steps of the method for preparing the carbon fiber composite material shell 16 are as follows:

[0052] S1 Preparation of polydopamine modified layer: immersing the carbon fiber cloth with the sizing agent removed in a dopamine mixed solution to obtain polydopamine grafted modified carbon fiber.

[0053] S2 Preparation of zinc oxide seed layer: The polydopamine grafted modified carbon fiber obtained in step S1 is added to the zinc oxide seed solution to obtain carbon fiber fully coated with the zinc oxide seed layer.

[0054] S3 Preparation of zinc oxide nanowires: Add the carbon fiber coated with the zinc oxide seed crystal obtained in step S2 to the zinc oxide growth solution to obtain carbon fiber with zinc oxide nanowires grown on the surface.

[0055] S4 Preparation of carbon nanotube composite layer, fix the carbon fiber cloth of zinc oxide nanowires obtained in step S3 on a stainless steel filter, then place it at the exhaust end of a tube furnace to collect carbon nanotubes, filter and deposit them to obtain zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface.

[0056] S5 prepares the mold. Prepare the corresponding mold according to the shape and size of the required shell. Spray the oily release agent evenly in the mold to ensure that the shell can be demoulded smoothly after curing.

[0057] S6 resin preparation, mix the epoxy resin and curing agent in proportion and stir thoroughly. After stirring, put the mixed resin into a vacuum pump to extract the bubbles in the resin to ensure that the resin is uniform and free of bubbles.

[0058] S7 vacuum bag preparation: put the preform fabric after preliminary trimming into the vacuum bag, insert the guide tubes at both ends of the braided round tube, and seal it with sealant. Bend one end to seal, and connect the other end to the vacuum pump to remove air and maintain the vacuum state.

[0059] S8 resin injection: insert the guide tube of the bent part into the mixed resin solution, and use the vacuum negative pressure principle to inject the resin into the preform under a certain pressure to ensure that the resin completely penetrates the fiber preform.

[0060] S9 Curing and post-processing: After the resin infusion is completed, the mold is sealed and the resin is cured at a certain temperature and pressure. After curing, demoulding is performed. The shell after demoulding is polished again to remove excess resin and corners to ensure the final size and shape of the product.

[0061] S10 quality inspection: Check the quality of the completed carbon fiber reinforced composite shell to ensure that there are no bubbles or gaps, and the size and shape meet the design requirements. Perform mechanical property tests to ensure that the product meets the expected performance indicators.

[0062] In this embodiment, the carbon fiber reinforced composite material shell 16 includes a carbon fiber layer 41 , a zinc oxide coating layer 42 , a carbon nanotube film layer 43 , and an epoxy resin layer 44 .

[0063] In this embodiment, the carbon fiber composite material shell 16 is modified with polydopamine, precipitated with a zinc oxide seed layer, and in-situ grown with zinc oxide nanowires to obtain a zinc oxide-coated carbon fiber with a needle-like structure, so as to improve the dielectric absorption loss performance of the carbon fiber.

[0064] In order to further improve the resistance loss and multiple reflection of the composite system, a carbon nanotube film is deposited on the surface of zinc oxide-carbon fiber by floating catalyst chemical vapor deposition (FCCVD) to form a functional composite network structure with multiple components interconnected. Finally, vacuum assisted resin transfer molding (VARTM) process is used to impregnate epoxy resin to prepare a carbon fiber composite shell 16. This comprehensive process allows electromagnetic waves to form multiple reflections and efficient absorption losses inside the carbon fiber composite material to improve its electromagnetic shielding performance.

[0065] This embodiment also provides a shock absorber, which includes a shell 16 made by the preparation method of a carbon fiber composite material shell 16, and also includes a working cylinder 3, an energy recovery mechanism, and a magnetic spring. The energy recovery mechanism is installed at the upper end of the working cylinder 3, and the magnetic spring is installed at the lower end of the working cylinder 3. The magnetic spring includes a shell 16, a first magnet 13, a second magnet 15, a moving magnet 14, and a piston rod 1. The first magnet 13 is installed at the top position of the shell 16, the second magnet 15 is installed at the bottom position of the shell 16, and the moving magnet 14 is installed on the piston rod 1, and moves between the first magnet 13 and the second magnet 15 through the piston rod 1; the piston rod 1 passes through the working cylinder 3, and in the process of the piston rod 1 driving the moving magnet 14 to move, the piston rod 1 drives the energy recovery mechanism to move synchronously, so that the energy recovery mechanism recovers energy.

[0066] In this embodiment, a flange 2 is installed on the top of the working cylinder 3 .

[0067] In this embodiment, the first magnet 13, the second magnet 15, and the movable magnet 14 can be permanent magnets, electromagnets, or other magnets. The upper end magnetism of the movable magnet 14 is set at the same level as the lower end magnetism of the first magnet 13, and the lower end magnetism of the movable magnet 14 is set at the same level as the lower end magnetism of the second magnet 15.

[0068] It should be added that the shell 16 is a barrel structure, an end cap 12 is installed at the opening of the shell 16, and a dust cover 11 is installed at the end cap 12. The first magnet 13 can be fixed to the end cap 12 by an adhesive, and the second magnet 15 can be fixed to the bottom of the shell 16 by an adhesive. The dust cover 11 prevents external dirt from entering the shell 16, ensuring the stability of the magnetic spring.

[0069] It should be supplemented that a connecting ring 17 is welded or bolted to the bottom of the housing 16 , and the connecting ring 17 is used to connect to the vehicle suspension.

[0070] When a car encounters uneven or bumpy roads during driving, the suspension system will be vibrated accordingly. In this dynamic environment, the piston rod 1 in the shock absorber will perform fine linear motion in response to external shocks and vibrations. In this process, the moving magnet 14 will move accordingly relative to the first magnet 13 and the second magnet 15 according to the vibration of the suspension. As the moving magnet 14 moves, the distance between it and the first magnet 13 and the second magnet 15 will change, thereby causing a change in magnetic force. When the moving magnet 14 moves up or down, the distance between it and the first magnet 13 and the second magnet 15 decreases. According to the repulsion principle of magnetic force, this reduction in distance will cause the repulsion force to gradually increase. When the moving magnet 14 moves to a specific critical position, the moving magnet 14 moves in the opposite direction, thereby slowing down the vibration of the suspension.

[0071] In this embodiment, the energy recovery mechanism includes a first bevel gear 5, a second bevel gear 9 and an energy recovery motor 10 coaxially mounted in the working cylinder 3; the first bevel gear 5 and the second bevel gear 9 are arranged opposite to each other, that is, the teeth of the first bevel gear 5 and the teeth of the second bevel gear 9 are arranged opposite to each other. The energy recovery motor 10 is coaxially mounted with a third bevel gear 7, and the third bevel gear 7 is meshed with the first bevel gear 5 and the second bevel gear 9.

[0072] In this embodiment, the first bevel gear 5 and the second bevel gear 9 are provided with through internal screw holes along their axis, and the outer edge surface of the piston rod 1 is provided with external threads that are compatible with the internal screw holes of the first bevel gear 5 and the second bevel gear 9; the piston rod 1 is threadedly matched with the first bevel gear 5 and the second bevel gear 9.

[0073] In this embodiment, the first bevel gear 5, the second bevel gear 9, and the third bevel gear 7 are all mounted on the working cylinder 3 through ball bearings. The ball bearings are used to reduce friction during gear transmission and reduce energy loss. Specifically, for easy distinction, the ball bearing mounted on the first bevel gear 5 is recorded as the first ball bearing 4, the ball bearing mounted on the second bevel gear 9 is recorded as the second ball bearing 8, and the ball bearing mounted on the third bevel gear 7 is recorded as the third ball bearing 6.

[0074] When the car encounters uneven or bumpy roads during driving, the suspension system will vibrate accordingly. In this process, the moving magnet 14 moves accordingly relative to the first magnet 13 and the second magnet 15 according to the vibration of the suspension. The moving magnet 14 drives the piston rod 1 to move longitudinally. Under the cooperation of the external thread of the piston rod 1 and the internal screw hole of the first bevel gear 5 and the internal screw hole of the second bevel gear 9, the first bevel gear 5 and the second bevel gear 9 rotate, and then drive the third bevel gear 7 to rotate, and the third bevel gear 7 drives the energy recovery motor 10 to rotate.

[0075] When the automobile suspension is vibrated, the piston rod 1 in the shock absorber performs corresponding linear motion, thereby driving the first bevel gear 5 and the second bevel gear 9 to rotate, converting the linear motion into rotational motion. This continuous motion conversion process ultimately transmits power to the energy recovery motor 10 through the meshing of the third bevel gear 7, achieving effective energy conversion and energy recovery. This not only improves the efficiency of energy recovery, but also increases the functionality of the shock absorber, making it play a more important role in the automobile suspension system.

[0076] The shell 16 of the magnetic spring in this embodiment is made of carbon fiber composite material, which not only gives the magnetic spring excellent magnetic field isolation performance, effectively resists the interference of external magnetic field, ensures the stable operation of the magnetic spring under changing environmental conditions, but also significantly reduces the overall weight of the shock absorber due to its unique low-density characteristics. It not only improves the durability and reliability of the magnetic spring, but also has a positive impact on the overall performance of the car. The weight-reduced shock absorber can reduce the energy consumption of the vehicle, improve fuel efficiency, and enhance the dynamic response performance and handling stability of the vehicle. The shell 16 made of carbon fiber composite material not only shows foresight in technology, but also demonstrates its excellent performance advantages in practical applications, bringing a revolutionary breakthrough to the development of automobile vibration reduction technology.

[0077] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a carbon fiber composite material shell for a shock absorber, characterized in that: The preparation steps are as follows: Step 1: preparing a polydopamine modified layer: immersing the carbon fiber cloth from which the sizing agent has been removed into a dopamine mixed solution to obtain a carbon fiber grafted and modified with polydopamine; Step 2: preparing a zinc oxide seed layer: adding the carbon fiber modified by grafting of polydopamine obtained in step 1 to a zinc oxide seed solution to obtain a carbon fiber fully coated with a zinc oxide seed layer; Step 3: preparing zinc oxide nanowires: adding the carbon fiber coated with the zinc oxide seed crystals obtained in step 2 into a zinc oxide growth solution to obtain a carbon fiber cloth with zinc oxide nanowires grown on the surface; Step 4: preparing a carbon nanotube composite layer: fixing the carbon fiber cloth of zinc oxide nanowires obtained in step 3 on a stainless steel filter screen, and placing it at the exhaust gas end of a tubular furnace to collect carbon nanotubes, and filtering and depositing them to obtain zinc oxide-modified carbon fibers with carbon nanotubes deposited on the surface; Step 5, curing and demoulding: placing the obtained zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface into a vacuum mold, and injecting resin into the vacuum mold for curing; Demolding the zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface after curing; Step 6, post-processing: polishing the zinc oxide modified carbon fiber with carbon nanotubes deposited on the surface after demoulding, removing excess resin and corners, and forming the final shell (16) shape.

2. The method for preparing a carbon fiber composite material shell for a shock absorber according to claim 1, characterized in that: The dopamine mixed solution in step 1 is prepared by mixing dopamine hydrochloride, tris(hydroxymethyl)aminomethane) and anhydrous ethanol.

3. The method for preparing a carbon fiber composite material shell for a shock absorber according to claim 1, characterized in that: The zinc oxide seed crystal solution in step 2 is prepared by mixing zinc acetate dihydrate and isopropyl alcohol.

4. The method for preparing a carbon fiber composite material shell for a shock absorber according to claim 1, characterized in that: The zinc oxide growth solution in step 3 is prepared by uniformly mixing zinc nitrate hexahydrate and a hexamethylenetetramine aqueous solution, and then adjusting the pH value of the solution with polyethyleneimine.

5. The method for preparing a carbon fiber composite material shell for a shock absorber according to claim 1, characterized in that: The carbon nanotube film attached to the outside of the carbon fiber in step 4 is prepared by a floating catalytic chemical vapor deposition method.

6. A vibration absorber, characterized in that: The shock absorber comprises a shell made by the method for preparing a carbon fiber composite material shell for a shock absorber according to any one of claims 1 to 5, and further comprises: Working cylinder (3); An energy recovery mechanism, the energy recovery mechanism being mounted on the upper end of the working cylinder (3); A magnetic spring, the magnetic spring being mounted on the lower end of the working cylinder (3); The magnetic spring comprises a shell (16), a first magnet (13), a second magnet (15), a movable magnet (14) and a piston rod (1), wherein the first magnet (13) is mounted on the top end of the shell (16), the second magnet (15) is mounted on the bottom end of the shell (16), and the movable magnet (14) is mounted on the piston rod (1) and moves between the first magnet (13) and the second magnet (15) through the piston rod (1); The piston rod (1) passes through the working cylinder (3), and during the movement of the piston rod (1) driving the moving magnet (14), the piston rod (1) drives the energy recovery mechanism to move synchronously, so that the energy recovery mechanism recovers energy.

7. The shock absorber according to claim 6, characterized in that: The shell (16) is a barrel-shaped structure, and an end cover (12) is installed at the opening of the shell (16); and a dust cover (11) is installed at the end cover (12).

8. The shock absorber according to claim 6, characterized in that: A connecting ring (17) is installed at the bottom of the housing (16).

9. The vibration absorber according to claim 6, characterized in that: The energy recovery mechanism comprises a first bevel gear (5), a second bevel gear (9) and an energy recovery motor (10) which are coaxially mounted in the working cylinder (3); the first bevel gear (5) and the second bevel gear (9) are arranged opposite to each other, the energy recovery motor (10) is coaxially mounted with a third bevel gear (7), and the third bevel gear (7) is meshed with the first bevel gear (5) and the second bevel gear (9); The first bevel gear (5) and the second bevel gear (9) are provided with through-type internal threaded holes along their axes, and the outer edge surface of the piston rod (1) is provided with external threads that are compatible with the internal threaded holes of the first bevel gear (5) and the second bevel gear (9); the piston rod (1) is threadedly matched with the first bevel gear (5) and the second bevel gear (9).

10. The vibration absorber according to claim 9, characterized in that: The first bevel gear (5), the second bevel gear (9) and the third bevel gear (7) are all mounted on the working cylinder (3) via ball bearings.

Images