Reinforced shell for high-pressure laminates of composite material (options)

 

(57) Abstract:

The sheath is designed for high pressure vessels made of laminated composite material. The wrapper contains the power frame with a cylindrical section, the front bottoms and flanges in their pin holes formed by the combination of groups of layers of spiral and annular strips oriented in a spiral and circumferential directions respectively placed in them unidirectional high-modulus filaments, bonded polymeric binder, lined interior protective coating, while the structure of power in the Central zone bottoms formed with a combination of at least two groups of layers of spiral tapes, narrowed towards the pole holes, with a constant radius of pin holes at the base of the flanges with the increase of the width of 1.1-2.1 times in the subsequent layers of each group, and made of high modulus yarns of linear density 29-100 Tex on the basis of aramid fibers and epoxidised binder. The technical result is increased reliability and simplified design. 2 S. and 2 C.p. f-crystals., 5 Il.

The invention relates to shells made of composite materials, in particular reinforced shells for the impact of excess internal pressure.

It reinforced shells made of composite materials high demands on the durability, reliability and efficiency in conditions of excessive pressure of the gas flow in an engine, without destroying their constituent elements and details.

Known reinforced shell for high-pressure laminates of composite material containing a main frame with a cylindrical section, the front bottoms and flanges in their pin holes formed by the combination of groups of layers of spiral and annular years, oriented in a spiral and circumferential directions respectively placed in them unidirectional high-modulus filaments, bonded polymeric binder, lined interior protective coating (patent EPO 0191655 B1, 29 53/66, F 17 f/16, 1989).

This reinforced shell to reduce stress concentration in the areas of pin holes bottoms spiral belt formed by the groups speed by changing the angle of inclination of the helical ribbons.

However, this design is not available dense stacking spiral bands around the respective pin holes formed cavity in the overlap of the material has some porosity and friability, that reduces the quality of the products, their durability and reliability.

Similar disadvantages reinforced shell for U.S. patent 3083864, CL 220-3, 1963.

Attempts to reduce the concentration of stresses in the zones of pin holes (US patent 4053081, CL 220-3, 1977.) the introduction of the formed mesh reinforced elements will change to the specified profile bottoms and disorientation subsequent layers of spiral tapes, complicates the forming frame, increases the weight, complexity and cost of materials.

The closest analogue technical solution is reinforced shell for EPO patent 0191655 B1, selected as a prototype.

The main task is the creation of a reinforced shell made of laminated composite material of high quality that would have eliminated the above-mentioned disadvantages, the shell would have increased strength.

The technical result from the use of the invention is to achieve weight perfection and increase operational reliability.

The main problem is solved and the technical result is achieved by changing the framing of the reinforced membrane introduction sweetone spiral ribbons with increasing width in the other parallel form, and run it from aramid fiber.

To do this in a reinforced shell for high-pressure laminates of composite material containing a main frame with a cylindrical section, the front bottoms and flanges in their pin holes formed by the combination of groups of layers of spiral and annular strips oriented in a spiral and circumferential directions respectively placed in them unidirectional high-modulus filaments, bonded polymeric binder, lined interior protective coating, its structure of power in the Central zone bottoms formed with a combination of at least two groups of layers of spiral tapes narrowed towards the pole holes with the increase of the width of 1.1-2.1 times in the subsequent layers of each group with a constant radius of pin holes at the base of the flange, and is made of high modulus yarns of linear density 29-100 Tex. On the basis of aramid fibers and epoxydodecane connecting structure of power shell can be formed from groups of layers with unequal number of threads in the layers of spiral ribbons.

In another embodiment, the structural frame of the reinforced membrane can be formed with a combination of on manroop constant radius pin holes at the base of the flanges and is made of high modulus yarns of linear density 29-100 Tex on the basis of aramid fibers and epoxidised binder. While the structural frame can be formed from groups of layers with equal number of threads in the layers of spiral ribbons.

Distinctive features reinforced shell for high-pressure laminates of composite material are the following features:

- education framework in the Central zone bottoms with a combination of at least two groups of layers of spiral tapes, narrowed towards the pole holes;

- constant radius pin holes of groups of layers at the base flanges;

- increase the width of the spiral tape in successive layers each group 1.1-2.1 times;

- formation framework of groups of layers with unequal number of threads in the layers of spiral ribbons.

Or:

- education framework with a combination of at least two groups of layers of spiral tapes with the increase of the width of 1.1-2.1 times in the subsequent layers of each group;

- constant radius pin holes of groups of layers at the base flanges;

- formation framework of groups of layers with different number of threads in the layers of spiral ribbons.

General features of the variants reinforced shell is executing its kasvatusele. These distinctive features are essential, because each of them separately and together is aimed at solving the problem and achieving a new technical of the two variants of execution of the power of the frame shell. In the first embodiment, a spiral belt in the Central areas of the bottoms narrowed towards the pole holes with an increase in their width in the subsequent layers, in another embodiment, a spiral belt is made of a variable width, increasing in layer groups. And in both cases groups of layers with increasing width of the helical ribbons formed with a constant radius of pin holes at the base of the flanges and is made of high modulus yarns of linear density 29-100 Tex and epoxidised binder. In the first embodiment, the structural frame may be formed with a combination of layer groups with unequal number of threads in the layers of spiral tapes, in another embodiment with equal number of them. These important features make it possible to increase the density of material in areas of the pole flanges, to reduce the deformability of the bottoms, to ensure optimal weight of the membranes and increase operating reliability.

Distinguishing the essential features of imperialism is adequate to characterize reinforced shell for high-pressure variants in the exercise of its power frame according to the criterion of "novelty."

One set of new essential features with commonly known essential features allows you to solve the problem and achieve a new technical result in weight perfection of products to ensure their high strength and reliability that characterizes the proposed solution significant differences from the prior art, analogs and prototypes. A new technical solution is the result of research work and creative input without the use of standardized projects or recommendations in this technical field, is the original, non-obvious to specialists in the art, corresponds in essential features the criterion of "inventive step".

The invention is illustrated by drawings with a brief description.

In Fig. 1 presents a General view of the reinforced shell for high pressure of the layered composite material of Fig.2 shows the bottom of the reinforced shell with the narrowed helical ribbons (first option), Fig. 3 shows the bottom of the reinforced shell in the longitudinal section (first option), Fig.4 shows the bottom reinforced obolos the e reinforced shell in the longitudinal section (the second option).

A more detailed description of the invention consists in the following.

Reinforced shell for high-pressure laminates of composite material (Fig.1) contains the structural frame 1 with a cylindrical section 2, the front bottoms 3, 4 and flanges 5, 6 in their pin holes 7, 8, formed by the combination of groups 9, 10 and 11 layers 12, 13, 14 spiral and annular strips 15, 16, which are oriented in a spiral and circumferential directions respectively placed in them unidirectional high-modulus filaments 17, 18, bonded polymeric binder, lined interior protective coating 19.

Power frame 1 reinforced shell in the Central areas of the bottoms 3, 4 (Fig. 2, figs.3 - the first option) is formed with a combination of at least two groups of 9, 10 layers 12, 13 of spiral tapes 15, narrowed towards the pole holes 7, 8 with a constant radius at the base 20 of the flanges 5, 6 with the increase of the width of 1.1-2.1 times in the subsequent layers 13 each from groups 9, 10, and made of high modulus filaments 17, 18 linear density 29-100 Tex on the basis of aramid fibers and epoxidised binder.

Main frame 1 of the reinforced membrane of the first variant can be made by forming g the new shell (Fig.4, Fig.5 - the second option) is formed with a combination of at least two groups of 9, 10 layers 12, 13 of the spiral tape 15 with the increase of the width of 1.1-2.1 times in the subsequent layers 13 each from groups 9, 10 with a constant radius of pin holes 7, 8 at the base 20 of the flanges 5, 6 without narrowing to pin holes and is made of high modulus yarns 17, 18 linear density 29-100 Tex on the basis of aramid fibers and epoxidised binder. Main frame 1 of the reinforced membrane of the second option can be done by forming groups 9, 10 layers 12, 13 with an equal number of threads 17 in the layers 12, 13 of spiral tapes 15.

Reinforced shell for high-pressure laminates of composite material (Fig. 1 - Fig.5) may be made by way of the winding to a removable mandrel (not shown), followed by curing a polymeric binder.

The functioning of the reinforced shell for high-pressure laminates of composite material based on aramid fibers and epoxidised binder is finding it in the stress-strain state within the elastic properties of the composite material of her power frame 1, with a view to ensuring high on the creation of the proposed structures and reinforcement material. Tests of reinforced membranes are manufactured using new technical solutions, showed positive results. Implementation of the proposed technical solution to achieve weight perfection of products, ensuring high durability and reliability.

Thus, a new technical solution produced in production conditions, provides problem solving and the achievement of a new technical result in the proposed set of features corresponds to the criterion "industrial applicability", i.e. the level of invention.

It should be noted that there may be various combinations of run-reinforced shell for high-pressure laminates of composite material in the form, size and position of the individual elements. The proposed form of execution is only possible preferred options for its implementation, can be different combinations, if all this does not go beyond the limits of existing features set forth in the claims.

The proposed solution is not limited to its use in reinforced membranes for high pressure, it may be the opportunities operating under positive pressure.

1. Reinforced shell for high-pressure laminates of composite material containing a main frame with a cylindrical section, the front bottoms and flanges in their pin holes formed by the combination of groups of layers of spiral and annular strips oriented in a spiral and circumferential directions respectively placed in them unidirectional high-modulus filaments, bonded polymeric binder, lined interior protective coating, characterized in that its structure of power in the Central zone bottoms formed with a combination of at least two groups of layers of spiral tapes, narrowed towards the pole holes, with a constant radius of pin holes at the base of the flanges with the increase of the width of 1.1-2.1 times in the subsequent layers of each group, and made of high modulus yarns of linear density 29-100 Tex on the basis of aramid fibers and epoxidised binder.

2. Shell under item 1, characterized in that the power frame formed of groups of layers with unequal number of threads in the layers of spiral ribbons.

3. Reinforced casing for high pressure from cleistogamy in their pin holes, formed by the combination of groups of spiral and annular strips oriented in a spiral and circumferential directions respectively placed in them unidirectional high-modulus filaments, bonded polymeric binder, lined interior protective coating, characterized in that its main frame is formed with a combination of layers of spiral tapes with the increase of the width of 1.1-2.1 times in the subsequent layers of each group with a constant radius of pin holes at the base of the flanges and is made of high modulus yarns of linear density 29-100 Tex on the basis of aramid fibers and epoxidised binder.

4. Shell on p. 3, characterized in that the power frame formed of groups of layers with equal number of threads in the layers of spiral ribbons.

 

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