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CN-122009481-A - Automatic inclinator guide cylinder and preparation method thereof

CN122009481ACN 122009481 ACN122009481 ACN 122009481ACN-122009481-A

Abstract

The invention provides an automatic inclinator guide cylinder and a preparation method thereof, and belongs to the technical field of helicopter transmission systems. The automatic inclinator guide cylinder is made of a carbon fiber composite material, wherein the carbon fiber composite material comprises carbon fibers and an organic modified material, and the organic modified material comprises one or more of epoxy resin, bismaleimide and polyaryletherketone. The carbon fiber composite material comprises non-metal carbon fibers and an organic modified material, wherein the carbon element of the carbon fibers has extremely high chemical stability and does not react with rainwater, and the composite material has no electrochemical activity of metal and cannot generate micro-battery corrosion or oxygen absorption corrosion. The organic modified material has excellent water barrier property, only forms short wetting on the surface, does not generate dissolution loss or falling off, and has no influence on the integrity of the core structure.

Inventors

  • BAO ZHIPENG
  • JIN GUANGHU
  • ZHANG GENMIAO
  • Fan Chaojin
  • Kang Feiyuan

Assignees

  • 南京航空航天大学

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. An automatic inclinator guide cylinder comprises a cylinder section (1) and a conical cylinder section (3) connected with the cylinder section (1), wherein the free end of the conical cylinder section (3) comprises a convex ring (31) extending outwards along a circle, and the automatic inclinator guide cylinder is characterized in that the automatic inclinator guide cylinder is made of carbon fiber composite materials; The carbon fiber composite material comprises carbon fibers and an organic modified material, wherein the organic modified material comprises one or more of epoxy resin, bismaleimide and polyaryletherketone.
  2. 2. The automatic recliner guide cylinder of claim 1 wherein the carbon fiber composite material has a carbon fiber volume content of 48-55%.
  3. 3. The automatic recliner guide cylinder of claim 1 wherein the epoxy resin includes tetrafunctional glycidylamine or toughened epoxy resin prepreg.
  4. 4. The automatic recliner guide cylinder according to claim 1, characterized in that the carbon fiber has a monofilament diameter of 7 μm±0.2, a tensile strength of 5GPa or more, and an elastic modulus of 294GPa or more; The density of the carbon fiber composite material is 1.5-1.65 g/cm 3 .
  5. 5. The automatic recliner guide cylinder according to claim 1, characterized in that stud holes are distributed on the collar (31), and the distance between every two stud holes is 80-130 mm.
  6. 6. The automatic recliner guide cylinder according to claim 1, characterized in that the size of the transition fillet of the conical cylinder section (3) is not less than 5mm, and the distance of the stud hole from the outermost edge of the collar (31) is not less than 2 times the diameter of the stud hole.
  7. 7. The automatic recliner guide cylinder according to claim 1, characterized in that the cylinder section (1) has an outer diameter of 143±0.2mm, an inner diameter of 138±0.2mm, a height of 225±0.2mm and a wall thickness of 5±0.2mm; The outer diameter of the free end of the conical barrel section (3) is 143-190 mm, the inner diameter of the free end of the conical barrel section is 138-185 mm, the height of the conical barrel section (3) is 85+/-0.2 mm, and the wall thickness of the conical barrel section is 5+/-0.2 mm.
  8. 8. The method for manufacturing an automatic recliner guide cylinder according to any one of claims 1 to 7, comprising the steps of: And paving the carbon fiber composite material layer by layer on the surface of an automatic inclinator guide cylinder mould, and forming to obtain the automatic inclinator guide cylinder.
  9. 9. The preparation method of claim 8, wherein the carbon fiber composite material has a single layer thickness of 0.1-0.2 mm and a layer number of 30-50 layers.
  10. 10. The preparation method according to claim 8, wherein the molding is hot press molding, the temperature of the hot press molding is 100-140 ℃, the pressure is 0.5-1.0 MPa, and the heat preservation and pressure maintaining time is 1-3 h.

Description

Automatic inclinator guide cylinder and preparation method thereof Technical Field The invention belongs to the technical field of helicopter transmission systems, and particularly relates to an automatic inclinator guide cylinder and a preparation method thereof. Background The automatic inclinator guide cylinder is used as a key component in a helicopter transmission system, is a bridge for connecting a helicopter body control system and a rotor system, and is responsible for converting control instructions (longitudinal, transverse and total distances) of a driver into angle changes of rotor blades so as to finally control lifting, tilting and steering of the helicopter. Conventional auto-recliner guides typically use aluminum alloy. The automatic inclinator guide cylinder working environment has a rainwater environment, rainwater (particularly rainwater stored for a long time) is not pure water, gases such as CO 2、SO2、NOx and the like in the air can be dissolved, a weak acid environment (the pH value is usually 5.6-6.5, the acid rain can be as low as pH value < 4), and meanwhile, impurities such as dust, salt (the salt content of the rainwater in coastal areas is higher) and the like can be carried, and the factors can directly trigger electrochemical corrosion of the aluminum alloy. Although a layer of natural oxide film (Al 2O3) is arranged on the surface of the aluminum alloy, the oxide film can be slowly dissolved by the weak acidity of rainwater to expose fresh aluminum matrix, at the moment, the aluminum matrix (anode) and Cu, mg and other elements (cathode) in the alloy can form a micro battery under the action of the rainwater (electrolyte), oxygen absorption corrosion occurs, the generated aluminum hydroxide is loose and easy to fall off, and the new matrix is further exposed, so that the cycle of corrosion-falling-re-corrosion is formed. If the rainwater contains salt, cl - can accelerate to penetrate through an oxide film, so that more serious pitting corrosion is caused, and the aluminum alloy section is thinned and the strength is reduced in a short period. After the aluminum alloy is corroded by rainwater for a long time, the section is thinned and internal microcracks are initiated due to corrosion. Therefore, the automatic recliner guide cylinder manufactured by the commonly used aluminum alloy has the defect of poor corrosion resistance. Disclosure of Invention The invention aims to provide an automatic inclinator guide cylinder and a preparation method thereof, and the carbon fiber composite material automatic inclinator guide cylinder has obvious advantages in corrosion resistance compared with the traditional aluminum alloy automatic inclinator guide cylinder. In order to achieve the purpose of the invention, the invention provides the following technical scheme: An automatic inclinator guide cylinder comprises a cylinder section (1) and a conical cylinder section (3) connected with the cylinder section (1), wherein the free end of the conical cylinder section (3) comprises a convex ring (31) extending outwards along a circle, and the automatic inclinator guide cylinder is characterized in that the automatic inclinator guide cylinder is made of carbon fiber composite materials; The carbon fiber composite material comprises carbon fibers and an organic modified material, wherein the organic modified material comprises one or more of epoxy resin, bismaleimide and polyaryletherketone. Preferably, the carbon fiber composite material has a carbon fiber volume content of 48-55%. Preferably, the epoxy resin comprises a tetrafunctional glycidylamine or a toughened epoxy resin prepreg. Preferably, the monofilament diameter of the carbon fiber is 7 mu m plus or minus 0.2, the tensile strength is more than or equal to 5GPa, and the elastic modulus is more than or equal to 294GPa; The density of the carbon fiber composite material is 1.5-1.65 g/cm 3. Preferably, pile holes are distributed in the convex ring (31), and the distance between every two pile holes is 80-130 mm. Preferably, the size of the transition fillet of the conical barrel section (3) is more than or equal to 5mm, and the distance from the pile hole to the outermost edge of the convex ring (31) is more than or equal to 2 times of the diameter of the pile hole. Preferably, the outer diameter of the cylinder section (1) is 143+/-0.2 mm, the inner diameter is 138+/-0.2 mm, the height is 225+/-0.2 mm, and the wall thickness is 5+/-0.2 mm; The outer diameter of the free end of the conical barrel section (3) is 143-190 mm, the inner diameter of the free end of the conical barrel section is 138-185 mm, the height of the conical barrel section (3) is 85+/-0.2 mm, and the wall thickness of the conical barrel section is 5+/-0.2 mm. The invention also provides a preparation method of the automatic inclinator guide cylinder, which comprises the following steps: And paving the carbon fiber composite material layer by layer on the surface of a