Composite high-pressure bladder and method of its manufacture

 

The invention relates to the field of CNG vehicles, used for storage, transport and use of compressed and liquefied gases, and reduces the curvature of the fibers of the inner layers of the shell of the composite material when wound on the external layers and, consequently, increasing its rigidity. This technical result is achieved by the composite high-pressure bladder that contains an inner thin-walled metal shell and the external power shell made of composite material consisting of several layers of fibers of reinforcing material impregnated with a binder, according to the invention the layers of fiber reinforcing material is formed by alternating sections of fibers having different orientation of the coils with respect to the axis of the cylinder, and the parts of the fibers with the same orientation of the coils in each subsequent layer power shell offset sections of the fibers with the same orientation of orbits in the previous layer so in longitudinal section, of the power of the shell sections of the fibers with the same orientation of coils arranged in a checkerboard pattern. In the method of manufacturing a composite high-pressure bladder according to the invention the winding wino three ribbons of fibers of reinforcing material, missing three heads of intraclade engaged along the rotating shell of the reciprocating moving at different speeds relative to the generatrix of the shell. 2 S. and 2 C.p. f-crystals, 2 Il.

The invention relates to the field of CNG vehicles, used for the storage, transportation and use of compressed and liquefied gases. The greatest distribution cylinders of composite materials received in portable devices personal protective respiratory protection for fire and rescue; means of respiratory protection used in transportation and gas fuel systems of vehicles using natural gas. One of the main consumer properties of the cylinders used in these systems is small relative weight or efficiency, and a large number of cycles of charge-discharge at a relatively low cost.

Metal-composite cylinders consist of a thin sealing metal shell (liner), which includes a cylindrical shell made of thin sheet metal and welded along on a special welding machines; ellipsoidal bottoms, made by a method Stamboliiski part of the casing, as a rule, using slip rings, and then welded to the cylinder apparatus radial welding to form a sealed envelope, which is then covered with a binder impregnated reinforcing tape. The tape is formed of several harnesses (rovings) of reinforcing material passing through the feed track and the head of Interstudio, reciprocating motion, and is placed on the surface of the casing, which rotates with a certain speed.

The speed ratio of the shell and heads of intraclade determines the orientation of the tape relative to the generatrix. After making n-the number of the reciprocating movements (turns) head Interstudio surface of the shell is covered with a layer of reinforcing tape one orientation.

After covering the surface of the N-layers of different orientation, forming a package, the wrapping cycle of the product, usually repeated and after passing To-packet power shell is formed (see, for example, U.S. patent 5822838, F 17 C 1/06, 1998).

The quality of composite metal cylinder with equal efficiency and cost is determined by the deformation characteristic of the power shell or its volumetric expansion, which proporcionalnoe shell is determined by how fully implemented in the design of the shell such baseline characteristics of the reinforcing tape, as the modulus of elasticity ERefand tear strength. The smaller the difference, the higher the quality of the composite cylinder.

A disadvantage of known construction power shell is a relatively low stiffness of the material power of the shell caused by the decrease of the modulus of elasticity of the material along the reinforcing fibers. The reduction module is called the curvature of the fibers of the inner layers due to the receipt of "excess" length compressing their outer layers.

The closest in technical essence to the proposed tank is a composite high-pressure bladder that contains an inner thin-walled metal sealing sheath and the external power shell made of composite material consisting of several layers of fiber composite material (see RF patent 2140602, F 17 C 1/06, 1999). The various layers of fiber composite material power shell can have a different orientation of the coils of the fibers relative to the axis of the cylinder, with each layer of turns of the fiber composite material have the same orientation. A known design of composite cylinder high pressure inherent in those who placed composite high-pressure bladder, wherein the pre-metal made internal sealing sheath and then are wound on the sheath of the fibers of reinforcing material impregnated with a binder, followed by polymerization of the composite material in a heat chamber (see RF patent 2140602). The winding of the fiber reinforcing material for the formation of each layer of the power shell produce one ribbon of reinforcing material, passed through the head of Interstudio, reciprocating movement along the generatrix of the rotating shell.

The objective of the invention was to reduce the curvature of the fibers of the inner layers of the power of the shell when the winding on which the external layers of the shell and, consequently, increase its rigidity.

The task is solved in that the proposed composite high-pressure bladder that contains an inner thin-walled metal sealing sheath and the external power shell made of composite material consisting of several layers of fibers of reinforcing material impregnated with a binder, in which according to the invention the layers of fiber reinforcing material power shell is formed by alternating sections of fibers having different orientasi cylinder in each subsequent layer power shell offset sections of the fibers with the same orientation of orbits in the previous layer so in longitudinal section, of the power of the shell sections of the fibers with the same orientation of the coils relative to the axis of the cylinder is placed in a checkerboard pattern.

Another distinctive feature of the proposed tank is that in each layer of fibers power shell has at least three sections of fibers with different orientation of the coils relative to the axis of the cylinder successively replacing each other along the length of the balloon.

In a preferred embodiment, the cylinder turns of one of the portions of the layer of reinforcing fibers of the number of alternating areas of different orientation oriented relative to the axis of the cylinder at an angle 36-60o; the coils of the second area of the layer of reinforcing fibers, following the first section, oriented relative to the axis of the cylinder at an angle 12-20oand turns of the third section of the layer of reinforcing fibers following the second section oriented relative to the axis of the cylinder at an angle 87-89o.

The task is solved in that a method of manufacturing composite cylinder high pressure at which the pre-made from thin metal inner sealing sheath and then are wound on this rotating shell fibers EMERAUDE is the PRS according to the invention the winding of the fiber reinforcing material on the rotating inner shell simultaneously produce three ribbons of fibers of reinforcing material, missing three heads of intraclade engaged along the rotating shell reciprocating movement with different velocities relative to the generatrix of the shell.

The invention is illustrated by drawings.

In Fig.1 shows the proposed tank in longitudinal section.

In Fig.2 depicts a fragment of the power of the shell of the cylinder in longitudinal section.

The proposed composite cylinder high pressure (see Fig.1) contains an internal thin-walled sealing the shell 1 is made of stainless steel, for example, 12X18H10T and external power shell 2 made of composite material. The inner shell 1 is made of welded. It contains a cylindrical shell 3 and two of the bottom 4, is welded around the perimeter to the ring 3. In one of the bottoms 4 are 5 hole under the fitting 6. The fitting 6 has a flange 7, which is welded to the edges of the holes 5. Edge welded to the shell 3 and the bottom 4 are placed on the inner cylindrical slip rings 8.

Power shell 2 (see Fig.2) consists of several layers 9 of the fiber reinforcing material. Each layer 9 fiber reinforcing material power shell 2 is formed with alternating portions 10, 11 and 12 fibers with different orientation and cylinder, for example, sections 10, each subsequent layer power shell 2 offset sections of the fibers with the same orientation of orbits in the previous layer 9 so that in longitudinal cross-section of the power shell 2 (see Fig.2) lots of fibers with the same orientation of the coils relative to the axis of the cylinder, for example, sections 10, arranged in a checkerboard pattern. In this case the points of fibers with different orientation of the coils (10, 11 and 12) in each layer 9 intersect each other at the edges.

In a preferred embodiment, the power shell 2 turns of one of the sections 11 of the layer 9 of reinforcing fibers oriented (see the bottom layer 9 of the shell 2 in Fig.2) at an angle 36-60orelative to the axis of the cylinder. Turns fibers followed by section 12 of the same layer 9 power shell 2 is oriented relative to the axis of the cylinder at an angle 12-20o. Turns fibers next (third) of section 10 of the same layer 9 power shell 2 is oriented relative to the axis of the cylinder at an angle 87-89o. Such arrangement of sections 10, 11 and 12 of reinforcing fibers having different orientation of the coils with respect to the axis of the cylinder, in layers 9 power shell 2 has a higher modulus of elasticity along the grain of the power of the shell 2 by reducing the curvature of the fibers of the material power of the shell 2 and improve its deformation characteristics.

A method of manufacturing a container includes the following operations.

Cylindrical shell 3 of the inner shell 1 is made either by cold drawing, or by welding the edges of the blanks from thin stainless steel sheet thickness of 0.3-1.0 mm, which is welded to the cylinder. Welding is carried out by forming a cylindrical billet butt weld using TIG or electron beam welding. The bottom 4 are made of the same material either by stamping or by hydraulic pressing. In one of the bottoms 4 perform the Central hole 5 under the fitting 6, the flange 7 which are welded to the edges of the holes 5. After welding of the fitting 6, the edges of the shell 3 and the bottom 4 dock on the perimeter at the surface of the inner cylindrical washer rings 8 and weld in a butt joint.

The winding of the fiber reinforcing material on the rotating inner shell 1 are performed simultaneously by three strips of fiber reinforcing material passed through three head Interstudio (not shown) engaged along the rotating shell reciprocating movement with different velocities relative to the generatrix of the shell 1.

Claims

1. To the power envelope of composite material, consisting of several layers of fibers of reinforcing material impregnated with a binder, characterized in that the layers of fiber reinforcing material power shell is formed by alternating sections of fibers having different orientation of the coils with respect to the axis of the cylinder, and the parts of the fibers with the same orientation of the coils relative to the axis of the cylinder in each subsequent layer power shell offset sections of the fibers with the same orientation of orbits in the previous layer so that in longitudinal cross-section of the power shell sections of the fibers with the same orientation of the coils relative to the axis of the cylinder is placed in a checkerboard pattern.

2. The cylinder p. 1, characterized in that each layer of fibers power shell has at least three sections of fibers with different orientation of the coils relative to the axis of the cylinder successively replacing each other along the length of the balloon.

3. The cylinder p. 2, characterized in that the coils of one of the portions of the layer of reinforcing fibers oriented relative to the axis of the cylinder at an angle 36-60ocoils of the second, followed by the length of the cylinder section of the same layer of reinforcing fibers oriented relative to the axis of the cylinder at an angle 12-20oand third coils ucare the axis of the cylinder at an angle 87-89o.

4. A method of making a composite high-pressure bladder, wherein the pre-metal fabricate thin-walled inner sealing sheath and then are wound on this rotating shell fibers of reinforcing material impregnated with a binder, followed by polymerization of the composite material in a heat chamber, characterized in that the winding of the fiber reinforcing material on the rotating inner shell simultaneously produce three ribbons of fibers of reinforcing material passed through three head Interstudio engaged along the rotating shell reciprocating movement with different velocities relative to the generatrix of the shell.

 

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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.

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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.

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FIELD: mechanical engineering.

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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.

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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.

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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.

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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.

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