A carbon fiber composite material actuator fiber layup structure

Abstract

The present application relates to a kind of carbon fiber composite material actuator fiber layup structure, the actuator includes look as actuator cylinder, oil pipe and piston rod;Actuator cylinder and piston rod matrix use carbon fiber composite material;Oil pipe is wound carbon fiber composite material on metal matrix as reinforcing layer;The innermost layer of the fiber layup structure of the actuator cylinder is carbon fiber unidirectional tape 90 ° layup, second layer is carbon fiber 0 ° / 90 ° layup, third layer is carbon fiber ± 45 ° layup, the outermost layer is laid 3K plain weave;The innermost layer of the fiber layup structure of the piston rod is wound 3K plain weave after 90 ° winding carbon fiber unidirectional tape, middle layer is in turn 0 ° laid carbon fiber, 90 ° winding carbon fiber, 0 ° laid carbon fiber;The outermost layer is laid 3K plain weave;The innermost layer of the fiber layup of the oil pipe is 90 ° wound carbon fiber forming, outer layer is laid 3K plain weave.

Description

TECHNICAL FIELD

[0001] The present application relates to an electro-hydraulic servo mechanism for a launch vehicle, in particular to a carbon fiber composite material actuator fiber layup structure. BACKGROUND

[0002] Lightweight is an important trend in the development of electro-hydraulic servo actuators, and the development and application of new materials with high strength and low density is one of the main ways to achieve lightweight. In view of this, a design scheme is proposed to apply carbon fiber reinforced resin as the base material of the actuator cylinder and piston rod, to achieve lightweight of the electro-hydraulic servo actuator and further improve the specific power of the servo system.

[0003] The hydraulic cylinder is an important actuating mechanism of the electro-hydraulic servo system. The double-acting symmetrical hydraulic cylinder is widely used in electro-hydraulic servo systems because the two cavities have equal action areas, and the system dynamic characteristics are symmetrical when moving forward and backward. Among them, the actuator cylinder is a key part that contains and stores hydraulic medium. It needs to withstand high oil pressure during work and requires sufficient strength and stiffness. The piston rod is in a high-pressure, high-load, and high-speed working environment, and has high load-bearing strength and is a moving part. Therefore, the piston rod requires high hardness, excellent wear resistance, certain corrosion resistance, and good stiffness.

[0004] CFRP is an anisotropic composite material. The winding angle and thickness of the pre-impregnated carbon fiber reinforced resin have a great influence on the performance of the composite material base cylinder and piston rod. The performance requirements of the cylinder and piston rod are high, and the design scheme of the winding angle and thickness of the fiber reinforced resin is particularly important and will directly affect the strength, surface quality, and other properties of the composite material cylinder and piston rod. Therefore, the winding angle and thickness of the fiber reinforced resin need to be analyzed and considered from multiple dimensions such as material properties, product structure, layup process, and strength simulation to select the optimal layup structure design. SUMMARY

[0005] The technical problem solved by the present application is that in view of the above-mentioned problems, a carbon fiber composite material actuator fiber layup structure is proposed.

[0006] The technical solution of the present application is: a carbon fiber composite material actuator fiber layup structure, the actuator comprising an actuator cylinder, an oil pipe, and a piston rod; the base of the actuator cylinder and the piston rod is made of carbon fiber composite material; the oil pipe is wound with carbon fiber composite material as a reinforcing layer on a metal base.

[0007] The innermost layer of the fiber layup structure of the actuator cylinder is a 90° layup of carbon fiber unidirectional tape, the second layer is a 0° / 90° layup of carbon fiber, the third layer is a ±45° layup of carbon fiber, and the outermost layer is laid with 3K plain weave; the innermost layer of the fiber layup structure of the piston rod is wound with 3K plain weave and then wound with 90° carbon fiber unidirectional tape, the middle layer is sequentially laid with 0° carbon fiber, 90° wound carbon fiber and 0° carbon fiber, and the outermost layer is laid with 3K plain weave; the innermost layer of the fiber layup of the oil pipe is formed by winding with 90° carbon fiber tape, and the outermost layer is laid with 3K plain weave.

[0008] Preferably, the fiber layup structure of the actuator cylinder is four layers laid and then heated and cured together in an outer mold, the heating and curing system is at a temperature of 150±5℃ for 120±5min.

[0009] Preferably, the innermost layer of the fiber layup structure of the actuator cylinder is wound with unidirectional tape on a needle type winding machine, the tension is initially set to 5±0.5kg, the second layer is wound with unidirectional tape, the 0° layer is wound with artificial winding, both are one-time in place, the third layer is laid with artificial laying, and the outermost layer is laid with artificial laying.

[0010] Preferably, the innermost layer of the fiber layup structure of the actuator cylinder is 4mm thick, the second layer is 2mm thick, the third layer is 2mm thick, and the outermost layer is 0.25mm thick.

[0011] Preferably, the fiber layup structure of the piston rod first completes the innermost layer of plain weave and 90° winding, then completes the first curing forming by winding with OPP tape, and then completes the laying and winding of the middle layer and the outermost layer, and then completes the second curing forming by winding with OPP tape.

[0012] Preferably, the innermost layer of plain weave is 0.5mm thick, the 90° wound unidirectional tape is 1.5mm thick, the middle layer of 0° laid carbon fiber and 90° wound carbon fiber is 2mm thick, the 0° laid carbon fiber is 1.5mm thick, and the outermost layer of laid plain weave is 0.5mm thick.

[0013] Preferably, the innermost layer of the fiber layup structure of the oil pipe is 0.75mm thick, and the outermost layer is 0.25mm thick.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] Based on the mechanical model of the CFRP cylinder and the piston rod, the strength analysis and checking of different winding angles and winding thicknesses of the carbon fiber reinforced resin are carried out by means of finite element simulation and combining the winding process of the carbon fiber material, so as to obtain the fiber layer design scheme of the actuator cylinder, the piston rod and the oil pipe which can realize the optimal performance. The actuator structure strength of the layer design scheme is large, and can withstand the high pressure of 20 MPa and the axial load of 5000 N. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Carbon fiber composite actuator appearance diagram;

[0017] Figure 2 Composite material actuator cylinder fiber layer structure schematic diagram;

[0018] Figure 3 Composite material piston rod fiber layer structure schematic diagram;

[0019] Figure 4 Composite material oil pipe fiber layer structure schematic diagram. DETAILED DESCRIPTION

[0020] The application is further described below in combination with examples.

[0021] The carbon fiber composite actuator appearance is shown in Figure 1 The hydraulic cylinder is composed of an actuator cylinder 1, an oil pipe 2 and a piston rod 3 from the outside. The base bodies of the actuator cylinder 1 and the piston rod 3 are made of carbon fiber composite material. The carbon fiber composite material is wound on the metal base body as a reinforcing layer.

[0022] The composite material actuator cylinder fiber layer structure is shown in Figure 2 The innermost layer is made of 4mm C90 layer, a certain type of unidirectional tape with a width of 10mm is used, reciprocating winding is carried out on the thimble type tape winding machine, and the initial tension is 5kg; the second layer is made of 2mm C0 / C90 layer, wherein C90 is wound by the unidirectional tape winding process, C0 is wound by the artificial material rolling method, and C90(1mm) and C0(1mm) are respectively placed in place at one time. Due to the stepped structure of the two ends of the actuator cylinder, according to the structure needs of the actuator cylinder, C0 is additionally provided at both ends to be bent inward (for installing screws and connecting with other structural parts), and C90 is equal in length; the third layer is made of 2mm C±45 layer, which is manually laid; the outer layer is laid with 3K plain 0.25mm. After the laying is completed, the material blank is placed in the outer mold together, and is heated and cured at 150℃*120min.

[0023] The composite material piston rod fiber layer structure is shown in Figure 3As shown in the figure, the innermost layer is wound with 0.5mm 3K plain cloth, wound with 1.5mm C90 unidirectional tape, and wound with opp tape to complete the first curing forming; the middle layer is made of C0 / C90 laying + winding 2mm, C0 laying 1.5mm; the outer layer is laid with 3K plain cloth 0.5mm. After all the laying and winding are completed, OPP tape is wound for the second curing forming.

[0024] The fiber layer structure of the composite oil pipe is as shown in the figure Figure 4 As shown in the figure, the innermost layer is wound with 0.5mm 3K plain cloth, wound with 1.5mm C90 unidirectional tape, and wound with opp tape to complete the first curing forming; the middle layer is made of C0 / C90 laying + winding 2mm, C0 laying 1.5mm; the outer layer is laid with 3K plain cloth 0.5mm. After all the laying and winding are completed, OPP tape is wound for the second curing forming.

[0025] Although the present application has been disclosed with the above preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application by using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not deviate from the technical solutions of the present application, belongs to the protection scope of the technical solutions of the present application.

[0026] The part not described in detail in the present application belongs to the common knowledge of those skilled in the art.

Claims

1. A carbon fiber composite material actuator fiber layup structure, the actuator comprising an actuator cylinder, an oil passage, and a piston rod; characterized by: The actuating cylinder and the piston rod are made of carbon fiber composite material; the oil pipe is wound with carbon fiber composite material as a reinforcing layer on a metal base; The innermost layer of the fiber layer structure of the actuating cylinder is a 90° layer of carbon fiber unidirectional tape, the second layer is a 0° / 90° layer of carbon fiber, and the third layer is a ±45° layer of carbon fiber, and the outermost layer is a 3K plain weave; the innermost layer of the fiber layer structure of the piston rod is wound with a 3K plain weave and then a 90° layer of carbon fiber unidirectional tape, the middle layer is sequentially a 0° layer of carbon fiber, a 90° layer of carbon fiber, and a 0° layer of carbon fiber, and the outermost layer is a 3K plain weave; the innermost layer of the fiber layer structure of the oil pipe is formed by winding a 90° layer of carbon fiber, and the outermost layer is a 3K plain weave.

2. A fiber layup structure for a carbon fiber composite actuator according to claim 1, wherein: After the four layers of the fiber layer structure of the actuating cylinder are laid, the blank is placed in an outer mold for heating and curing, the heating and curing temperature is 150±5℃, and the time is 120±5min.

3. A fiber layup structure for a carbon fiber composite actuator according to claim 1, wherein: The innermost layer of the fiber layer structure of the actuating cylinder is wound with a unidirectional tape on a thimble-type tape winding machine, and the initial tension is 5±0.5kg; the second layer is wound with a unidirectional tape, and the 0° layer is manually wound, both of which are completed at one time; the third layer is manually laid, and the outermost layer is also manually laid.

4. A carbon fiber composite actuator fiber layup structure according to claim 3, wherein: The thickness of the innermost layer of the fiber layer structure of the actuating cylinder is 4mm, the thickness of the second layer is 2mm, the thickness of the third layer is 2mm, and the thickness of the outermost layer is 0.25mm.

5. The fiber layup structure of a carbon fiber composite actuator of claim 1, wherein: The fiber layer structure of the piston rod is first formed by winding a plain weave and a 90° layer, and then OPP tape is wound for the first curing; then the middle layer and the outermost layer are laid and wound, and after all the laying and winding are completed, OPP tape is wound for the second curing.

6. A fiber layup structure for a carbon fiber composite actuator according to claim 1 or 5, wherein: The thickness of the plain weave of the innermost layer of the fiber layer structure of the piston rod is 0.5mm, the thickness of the 90° layer of unidirectional tape is 1.5mm, the total thickness of the 0° layer of carbon fiber and the 90° layer of carbon fiber of the middle layer is 2mm, and the thickness of the 0° layer of carbon fiber is 1.5mm; the thickness of the outermost layer of the plain weave is 0.5mm.

7. The fiber layup structure of a carbon fiber composite material actuator according to claim 1, characterized by: The thickness of the innermost layer of the fiber layer structure of the oil pipe is 0.75mm, and the thickness of the outermost layer is 0.25mm.

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