Reinforced shell for high internal pressure of the layered composite material

 

Reinforced shell is a structure of power with a cylindrical section, the end convex bottoms and flanges of the pole holes. The frame formed by the combination of groups of layers of spiral and annular strips placed in them unidirectional high-modulus fibers. The pin holes formed in the annular protrusion with a circular depression on the outer surface. Filaments bonded polymeric binder. The frame is lined with an internal protective coating. Thick-walled annular element of the high modulus material is installed in the annular cavity and is fixed on the outer surface of at least one layer of helically overlapping tapes. The internal diameter of the annular element is equal to dfloor+(2,0-3,0)lenwhere dfloorthe current diameter of the pin holes, andlen- the width of the spiral belt in the pole hole. The use of the invention will increase the strength of the casing. 2 C.p. f-crystals, 3 ill.

The invention relates to shells made of composite materials, in particular reinforced casings for high internal pressure is used as a bearing kinnego pressure.

One of the most loaded parts of reinforced membranes are zones pin holes, where mainly the destruction of the shell due to exceeding the working stresses allowed for the reinforcing material. At the same time it reinforced shells made of composite materials high demands on the durability, reliability and weight perfection when used as load-bearing structures of the cylinders and tanks at high internal pressures.

Known reinforced shell for high internal pressure of the layered composite material containing a main frame with a cylindrical section, the front bottoms and flanges in their pin holes in contact with their inner surfaces 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 with the formation of the annular protrusion of the pin holes, bonded polymeric binder, lined interior protective coating (patent US 3083864, CL 220/83, 1963; 3047191, 220/83, 1962).

This reinforced shell pole ATM due to the high ring strain at the pole hole tensile stresses exceed the limit before, than in the whole of the shell.

Known reinforced shell for high internal pressure of the layered composite material, in which in the area of the pin holes between the layers are ring elements with an inner diameter equal to the pole hole, and sealed with layers of shell bolted connection (US 4053081, CL 220V / 3, 1977).

In this shell ring elements overlap the surface layers with access to the pin hole that leads to the transfer of the meridional efforts through the layer of binder, the strength of which is much lower reinforcing material, and a through bolt connection, which is in itself sufficiently strong hub stresses and not always acceptable from design considerations.

Known reinforced shell for high internal pressure of the layered composite material containing a main frame with a cylindrical section, the front bottoms and flanges in their pin holes in contact with their inner surfaces 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 nor the first inner protective coating (patents FR 2219899, IPC265 N 81/00, 1974; 2251756, IPC2F 16 J 11/00, 1974), in which the bolt flanged connections are located in the layers of composite material at the pin holes.

These shells inherent disadvantages noted above (patent US 4053081, CL 220V / 3, 1977), namely the need to strengthen the shell with additional layers to provide the necessary strength composite material in the area of location of the bolts.

The closest analogue technical solution is reinforced membrane according to the patent FR 2219899, IPC265 N 81/00, 1974, 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 increase the bearing capacity, the weight of the perfection and reliability of the reinforced shell under the action of internal pressure.

The main problem is solved and the technical result is achieved by reducing the annular deformation of the shell at the pin holes introduction thick-walled annular element of vysokovalentnogo internal pressure of the layered composite material, containing the power frame with a cylindrical section, the end convex bottoms and flanges in their pin holes in contact with their inner surfaces 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 with the formation of the annular protrusion of the pin holes, bonded polymeric binder, lined interior protective coating, the structural frame is equipped with at least one thick-walled annular element of high modulus material, installed in the annular depression of the outer surface of the annular protrusion of the bottom, respectively, made their congruent contact surfaces, fixed on the outer surface of the at least one layer of helically overlapping tapes, and the internal diameter of the annular element is equal to dfloor+(2,0-3,0)lenwhere dfloorthe current diameter of the pin holes, andlen- the width of the spiral belt in the pole hole.

The annular element may be the imp is Ala with a circular arrangement of unidirectional high strength reinforcing fibers. Distinctive features reinforced shell for high internal pressure of the layered composite material are the following characteristics: - power frame provided with at least one thick-walled annular element of high modulus material, is installed in the annular depression of the outer surface of the annular protrusion of the bottom; accordingly made congruent contact surfaces; ring element fixed on the outer surface of the at least one layer of helically overlapping bands; - the internal diameter of the annular element is equal to dfloor+(2,0-3,0)lenwhere dfloorthe current diameter of the pin holes, andlen- the width of the spiral belt in the pole hole.

ring element is made of high strength steel or titanium; ring element made of composite material with a circular arrangement of unidirectional high strength reinforcing material.

These essential features help to reduce the level of strain in the bottoms of the pin holes, to improve the weight perfection membranes and increase operating reliability.

About the logs and the prototype is not detected, which allows to characterize reinforced shell for high internal pressure according to the criterion of "novelty."

One set of new essential features with commonly known essential features that allow one to solve the problem and achieve new technical result in weight perfection structures by providing them with increased 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 internal pressure of the layered composite material of Fig.2 is a plot of the bottom of the pole holes with one annular element on the outer surface of the ledge is.

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

Reinforced shell for high internal pressure of the layered 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.

The annular element 20 is installed in the annular depression of the outer surface 21 of the annular protrusion 22 of the bottom of his pole holes 8. The annular element 20 is fixed on the outer surface 23 of at least one layer 24 of the spiral intersecting tapes.

Reinforced shell for high internal pressure of the layered composite material (Fig.1-3) can be produced by the method of winding to a removable mandrel (not shown), followed by curing a polymeric binder. The number of installed rings is determined by the specific design parameters of the internal pressure of the layered composite material on the basis of unidirectional reinforcing material and a polymeric binder is finding it in the stress-strain state within the elastic properties of composite materials which made her the power frame 1, with a view to ensuring high reliability and security without destroying bottoms 3, 4 zones pin holes 7, 8 by reducing levels of strain and stress in the composite material at the pin holes. Tests of reinforced membranes are manufactured using new technical solutions, showed positive results. Implementation of the proposed technical solution allows to increase the weight of the 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 internal pressure of the layered 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 chomienne technical solution is not limited to its use in reinforced membranes. As for high internal pressure, it can be used to implement detected and other properties described in the application materials, to obtain the vessels working under pressure.

Claims

1. Reinforced shell for high internal pressure of the layered composite material containing a main frame with a cylindrical section, the end convex bottoms and flanges in their pin holes in contact with their inner surfaces 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 with the formation of the pin holes of the annular protrusion with a circular depression on the outer surface, bonded polymeric binder, lined interior protective coating, characterized in that the main frame is equipped with at least one thick-walled annular element of high modulus material, mounted in the annular depression of the outer surface of the annular protrusion of the bottom, respectively, made their congruent contact p is the possibility of additional tapes moreover, the internal diameter of the annular element is equal to dfloor+(2,0-3,0)lenwhere dfloorthe current diameter of the pin holes, andlen- the width of the spiral belt in the pole hole.

2. Reinforced shell under item 1, characterized in that the annular element is made of high strength steel or titanium.

3. Reinforced shell under item 1, characterized in that the annular element is made of a composite material with a circular arrangement of unidirectional high strength reinforcing fibers.

 

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The invention relates to shells made of composite materials, in particular reinforced casings for high internal pressure is used as load-bearing structures or sites in the short-term or prolonged exposure to excessive internal pressure

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Pressure vessel // 2244868

FIELD: storing or distributing gases or liquids.

SUBSTANCE: pressure vessel has cylindrical shell made of spiral and ring layers which are made of a fiber composite material and bottoms with flanges made of spiral layers and set in openings. The thickness of the cylindrical shell uniformly decreases along the length in the direction to the bottom with greater opening due to the decrease of the thickness of the ring layers.

EFFECT: reduced weight and cost of vessels.

3 dwg

FIELD: mechanical engineering.

SUBSTANCE: vessel has plastic shell, flanges mounted in the pole openings in the shell, and lid set in one of the pole flanges. The lid is concave inward and bears on the inner side of the pole flange. The butt between the pole flange and lid is made to provide the radius of the circumference formed by intersection of the middle surface of the lid and surface of the bearing part of the flange to be larger than that of the pole opening in the plastic shell. The thickness of the pole flange should be at least 1.5-2 mm, which is sufficient for the formation of the plastic shell. The loading acts on the developed bearing surface of the lid which is mating to the inner surface of the pole flange.

EFFECT: decreased weight of vessel.

2 cl, 5 dwg

FIELD: automotive industry.

SUBSTANCE: high-pressure vessel comprises load-bearing shell made of a composition material, sealing shell, coaxial metallic connecting pipes with flanges embedded in the sealing shell, and nuts screwed on the connecting pipes. The sealing shell is made of two interconnected composition hemispherical molded shells. The method comprises winding composition layer on the preliminary prepared sealing shell and polymerizing the layer. The sealing shell is made of two half shells provided with openings for connecting pipes. Each shell is molded from the composition material with the use of punch and mold. The connecting pipes are glued. The half shells are interconnected. The outer load bearing shell is wound, and it is additionally secured to the connecting pipe through a nut.

EFFECT: enhanced permissible loading and decreased weight and cost.

4 cl, 1 dwg

FIELD: mechanical engineering industry; other industries; devices for production of the high pressure vessels by the method of coiling of the reinforcing materials.

SUBSTANCE: the invention is pertaining to production of the high pressure vessels by the method of coiling of the reinforcing material and may be used in mechanical engineering industry. The mandrel for manufacture of the high pressure vessels out of the composite materials contains the thin-wall sealing body with the holes. Inside the sealing body feed the binary mixture releasing in the process of the chemical reaction the gas creating the necessary internal pressure and ensuring the necessary rigidity of the sealing body in the process of the coiling and the composite material solidification. Usage of the invention will provide the reliable rigidity at the presence of the minimal polar holes in the sealing body and simplification of the process of manufacture of the high pressure vessels.

EFFECT: the invention ensures the reliable rigidity of the high pressure vessels at the presence of the minimal polar holes in the sealing body and simplification of the process of manufacture of the high pressure vessels.

1 dwg

FIELD: mechanical engineering.

SUBSTANCE: method comprises making inner sealing shell, outer load-bearing shell by winding the reinforcing threads on the inner shell and polymerizing the shell. Before making the inner sealing spherical shell, the connecting pipes are set in the mold for rotating molding, the grooves are made in the outer and inner surfaces, and ring projection is made on the inner surface from the side of the outlet opening of the connecting pipes. The inner sealing shell is then mounted for permitting rotation. The thread is wound on the shell by means of rotation of the shell, and before winding next layer each layer the angle between the axis of rotation of the shell and axis of rotation of the device for applying the thread changes by at least 2 degrees. The number of turns and thickness of next layer exceed these for the previous layer. The reinforcing threads are impregnated with a binder in vacuum. The binder is polymerized at a temperature lower than the temperature of softening of the material of the inner shell.

EFFECT: simplified method and enhanced strength of vessel.

2 cl, 1 dwg

FIELD: devices for storage and transportation of compressed gases under pressure, in particular, tanks for storage of oxygen, hydrogen, natural gas and other gases, may be used in different industrial branches, in transportation and other economic objects, where compressed, liquefied gas is used.

SUBSTANCE: composite high pressure tank contains external power cover made of composite material, produced by winding of circular and spiraling layers, and internal hermetic cover made of metal with welded in metallic flanged, mounted on opposite poles of the tank. Onto hermetic cover, firstly one circular layer of composite of low module reinforcing material is wound, then spiraling layers of high module material and final layers are made by circular winding of low module material.

EFFECT: minimized mass and manufacturing costs of the tank.

1 dwg

FIELD: high-pressure vessels.

SUBSTANCE: high-pressure housing comprises shell and elongated bottoms that are made by applying belts along the line of constant deviation.

EFFECT: enhanced strength and reliability.

2 cl, 4 dwg

FIELD: mechanics.

SUBSTANCE: high-pressure cylinder is intended for keeping fluids and gases in motor vehicles using a gas fuel, as well as fluids and fire-extinguishing gases in stationary fire-extinguishing modules. The cylinder incorporates a seamless inner all-metal sealing enclosure (1) and out strengthening element (2) made up of two multi-layer coverings (3, 4). Composite material of coverings (3, 4) is made up proceeding from the following expression, i.e. δB1B2, E1<E2, where δB1 and δB2 are the first (inner) and the second (outer) coverings composite material breaking point, respectively, E1 and E2 are the first (inner) and the second (outer) coverings composite material coefficient of elasticity, respectively.

EFFECT: higher reliability, cyclic strength at a high destructive pressure, longer life, lower weight and smaller sizes.

6 cl, 1 dwg

FIELD: engineering industry.

SUBSTANCE: vessel manufacturing method includes winding of fibre material with a binder on an insulated enclosure, and polymerisation. On the middle part of insulated enclosure there wound and cured to some extent is some part of fibre material with a binder, after that the rest fibre material with a binder is wound and polymerisation is performed.

EFFECT: improving reliability of vessel manufacturing method.

3 cl, 1 dwg

FIELD: mechanics.

SUBSTANCE: cylinder is comprised of an inner sealing metal liner with cylindrical ring and two semi-spherical or elliptical bottoms and external pressure shells. The above mentioned semi-spherical or elliptical bottoms are welded to the cylindrical ring by means of backing rings. The external pressure shell is made from composite material and implemented with continuously wounded strands or woven bands from composite material impregnated with binding compound. The strands or bands are wounded in two layers - helical and circular. The thickness of helical and circular layers is assumed no less than , where, δhel, δcir - thicknesses of helical and circular layers accordingly; δl - thickness of liner wall; El - liner material modulus of elasticity; Eth - modulus of elasticity of composite material along thread; Pmax - maximum operating pressure; R - mean radius of pressure shell on cylindrical part of liner; σyl - yield stress of liner material.

EFFECT: invention allows for extending cylinder serviceability period.

1 dwg

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