Jacket pipe made of composite materials

 

The invention relates to the structures of membranes and can be used in pipes-shells made of composite materials, in particular in the compartments, connecting the hulls of aircraft In the pipe-casing made of composite materials containing its corresponding profile of the structural frame of the arched rib-cellular structure with integral frames, with light filler between the ribs formed by layers of intersecting systems of high modulus filaments spiral and circumferential directions, bonded utverzhdennym polymeric binder, lightweight aggregate made of expanded polyethylene, monocitarnogo side edges of the power frame with a continuous film of polyethylene with a density of 0.6-0.8 g/cm3when it is the specific density of 0.1-0.15 g/cm3equipped with mesh substrate of glass or baselton, bonded with him an adhesive composition based on chemically slivaushiesia polyolefin, located on the inner surface of the power frame arched rib-cellular structure and bonded with him polymeric binder. The technical result of the invention is the optimal weight, high strength and robust construction. 2 C.p. f-crystals, 2 Il.

To pipe shells made of composite materials are increased requirements to ensure their high stiffness, strength and reliability with minimum weight indicators.

Famous jacket pipe made of composite materials containing its corresponding power profile skeleton rib-cellular structure with integral frames, with light filler between the ribs formed by layers of intersecting systems of high modulus filaments spiral and circumferential directions, bonded utverzhdennym polymeric binder (patent RU №2107215, IPC6F 16 L 9/12, 1997).

Famous jacket pipe made of composite materials with light filler in cells (patent RU №2096678, IPC6F 16 L 9/12, 1995).

Similar shell made of composite materials (US patent No. 4278485, NCI 156-173, 1989).

The disadvantages of the casing pipe should be attributed to the presence of the porous structure of the lung filler with side ribs, significant geometric deviations of the profile edges from the set, the non-bonded spots and weak strength, the link between these elements, reducing the strength and reliability of a design, excessive weight parameters are pores.

The closest analogue, selected as a prototype, is a tube-shell in patent RU No. 2107215.

The main task is the creation of the casing pipe with the power frame rib-cellular structure and light filler in his cell, in which the geometric parameters of multiple edges would correspond to the set.

The technical result from the use of the invention is to improve the strength, reliability and weight design perfection, improving technology in the manufacture.

The main problem is solved and the technical result is achieved by changing the properties of lightweight aggregate, increase the solidity, the introduction of a dense structure from the side edges of the frame, the introduction of the reinforcing substrate on the surface of the smallest radius, using the new concept of stress distribution.

To do this, the pipe-shell made of composite materials containing its corresponding profile of the structural frame of the arched rib-cellular structure with integral frames, with light filler between the ribs formed by the layers of intersecting systems of high modulus filaments spiral and circumferential directions, bonded utverzhdennym polymeric binder, a light C is a film of polyethylene with a density of 0.6-0.8 g/cm3when the specific gravity of 0.1-0.15 g/cm3equipped with mesh substrate of glass or baselton, bonded with him an adhesive composition based on chemically slivaushiesia polyethylene, located on the inner surface of the power frame arched rib-cellular structure and bonded with him polymeric binder. The mesh substrate can be made in the form of a single layer of glass or baselton, and as an adhesive composition for bonding the substrate with light filler used chemically slivaushiesia polyolefin. Polymer binder as the basis may contain epoxy resin.

Distinctive features of the pipe shell made of composite materials are signs of:

- performance lightweight aggregate from polyethylene foam,

- monolithic lightweight fill material from the sides of the ribs of the power frame with a continuous film of polyethylene with a density of 0.6-0.8 g/cm3when the specific gravity of 0.1-0.15 g/cm3,

- supply a lightweight fill material mesh substrate of glass or baselton located on the inner surface of the power frame arched rib-cellular structure,

- bond substrate a polymeric binder, for example, stereoside single layer of glass or baselton.

These features of the pipe shell made of composite materials are essential, as each of them separately and together is aimed at solving the problem and achieving a new technical result. The availability of lightweight aggregate in the surface layers from the side edges of the continuous film to the higher density and a reinforcing substrate of woven filler allows greater load capacity to use the rib-cellular structure in the stress-strain state of a lightweight aggregate that allows you to create a tube-shell lighter weight and increase the weight perfection

These distinctive essential features are new, because their use in the prior art, analogs and prototype not found that characterizes the proposed technical solution according to the criterion of "Novelty".

One set of new essential features with commonly known essential features can solve the problem of creation of the casing pipe of a more perfect design and achieve a new technical result, which characterizes the proposed solution significant differences from investorskih and experimental studies creative contribution without the use of standards or recommendations in this field of technology is a novel and non-obvious for specialists created using the new concept of stress distribution throughout the volume of the aggregate, meets the criterion of "Inventive step".

The invention is illustrated by drawings with a brief description.

In Fig.1 presents a General view of the tube-shell made of composite materials; Fig.2 is a cross section of the pipe shell in the axial-radial direction.

A more detailed description of the invention showing the positions of the drawings is as follows.

Jacket pipe made of composite materials (Fig.1) it contains the corresponding profile main frame 1 of the arched rib-cellular structure with integral frames 2, 3, with light filler 4 between the ribs 5-7, formed by layers of systems of intersecting filaments 8-10 spiral and circumferential directions, bonded utverzhdennym polymeric binder. Lightweight aggregate 4 is made of foamed polyethylene, monocitarnogo with sides of ribs 5-7 power frame 1 by a continuous film 11 of polyethylene with a density of 0.6-0.8 g/cm3when the specific gravity of 0.1-0.15 g/cm3, sleep is Eski slivaushiesia polyolefin, located on the inner surface 13 of the power frame 1 arched rib-cellular structure and bonded with him polymeric binder. The mesh substrate 12 may be made in the form of a single layer of glass or baselton. As the adhesive for bonding the substrate 12 with light filler 4 can be used chemically slivaushiesia polyolefin and a polymer binder for bonding the substrate 12 with the frame 1 as the base may contain epoxy resin.

The operation of the tube-shell made of composite materials lies in the perception of its power frame 1 arched rib-cellular structure compressive, tensile, bending loads, or combinations thereof, through affecting the end frames 2, 3 and finding his ribs 5-7, lightweight fill material 4 and the substrate 12 in the stress-strain state. The transfer of load and strain in lightweight aggregate 4 comes from the ribs 5-7 through a solid film 11 of foamed polyethylene of high density and substrate 12 via the adhesive layer.

Tube-shell made of composite materials, manufactured using new technical solutions, high quality, most effective from the way, a new technical solution for implementing the pipes-shells made of composite materials produced industrially, confirmed by the new technical result, a pronounced increased strength, durability, and weight perfection, and corresponds to the criterion "industrial applicability", i.e. the level of invention.

Scope of the invention should be understood broader than the specific implementation. contained in the description, claims and drawings. The form of execution of the invention is only possible preferred options for its implementation. Can be various combinations in terms of size and location of individual elements, if this is not beyond the scope of the technical solution described in the claims, the expression of these and other properties stated in the description.

Claims

1. Jacket pipe made of composite materials containing its corresponding profile of the structural frame of the arched rib-cellular structure with integral frames, with light filler between the ribs formed by layers of intersecting systems of high modulus filaments spiral and circumferential directions, bonded utverzhdennym polymer is toron ribs framework with a continuous film of polyethylene with a density of 0.6-0.8 g/cm3when it is the specific density of 0.1-0.15 g/cm3equipped with mesh substrate of glass or baselton, bonded with him an adhesive composition based on chemically slivaushiesia polyolefin, located on the inner surface of the power frame arched rib-cellular structure and bonded with him polymeric binder.

2. Tube-shell under item 1, wherein the mesh substrate is in the form of a single layer of glass or baselton, and as an adhesive composition for bonding the substrate with light filler used chemically slivaushiesia polyolefin.

3. Tube-shell under item 1 or 2, characterized in that the polymeric binder as the Foundation it contains the epoxy resin.

 

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