RU2327924C1 - Method of power jacket winding of high pressure cylinder from polymer composite materials and high pressure cylinder from polymer composite materials - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: in realisation of method of power jacket winding on high pressure cylinder from polymer composite materials on sealing liner, which consists of cylindrical part and spherical bottoms with pole flanges, with tape of fiber threads spiral layers are wound, touching with tape coils that are installed in bottoms of pole flanges necks. Threads of tape in the area of contact are arc-bent, tape is deformed to garrot of circular section, and with array of arc-bent threads pressing ring is formed for pole flange neck. Maximum length of threads for ring formation is determined by formula:

where 1 - maximum length of threads for ring formation, H - tape width, mm; r - radius of pole flange neck, mm; c= 1.02-1.25 - experimental coefficient, which considers change of thread length from tape "packing", depends on tape tension, viscosity of binder, deviation from optimal location of threads in the ring.

EFFECT: increase of operation reliability.

2 cl, 9 dwg

Description

The invention relates to the field of engineering, in particular to the production of composite high-pressure cylinders, used mainly for storage and transportation of compressed and liquefied gases.

The most promising are multilayer, mainly two-layer, high-pressure cylinders containing an inner sealing layer (liner) and an outer one, a power one, made by winding a tape formed from threads or bundles of high-modulus high-strength material impregnated with a polymer binder followed by heat treatment according to a certain mode. With sufficient annular and axial rigidity of the liner, winding is performed on the liner as a mandrel, without reinforcing it in the axial and annular directions. The power shell, in this case, is made in the form of a “Cocoon” having pole holes on the bottoms. The pole holes are closed by flanges, often made integral with the liner. One of the flanges is a plug, and the other has a production neck. The zones of the pole openings with flanges in this case are concentrators when the cylinders are loaded with ultimate pressures.

Known pressure vessel of polymer composite materials by as USSR No. 763646 of 03/13/78, IPC ³ F17C 1/00, containing a sealing liner and a power shell.

Known pressure vessel of polymer composite materials according to the application EPO No. 0167334 from 08.01.86, IPC ⁷ F65C 13/12. The known vessel is made two-layer and contains an internal sealed shell, on which are wound power polymer layers.

Known high-pressure cylinder made of polymer composite materials according to the patent of the Russian Federation No. 2269044 C1 dated 05/20/2004, IPC ⁷ F16J 12/00, containing a liner, flanges and a power shell with reinforcements in the zones of the flanges.

Known pressure vessel made of polymer composite materials according to the application EPO No. 0147042, IPC ⁷ F17C 1/16, containing the liner and the power shell.

Known pressure vessel of polymer composite materials according to the patent of Germany No. 1625937 from 08/14/69, IPC ⁷ F65J 11/06. Known vessel contains an internal sealed shell and power sheathing.

Known capacity of polymer composite materials according to the patent of the Russian Federation No. 2246062 C2 from 08/13/2004, IPC ⁷ F16J 12/00. Known capacity contains a liner with pole flanges and a power shell of variable thickness, maximum - in the area of the necks of the pole flanges.

Known high-pressure vessel made of polymer composite materials according to the application of Germany No. OS 3103646 from 08/12/82, IPC ⁷ F17C 1/13, containing the inner sealing layer and the power shell.

A known method of performing a pressure vessel of a polymer composite material by and.with. No. 1132094 dated 04/27/82, IPC ⁷ F16J 12/00, in which a power sheath is applied to the inner sealing layer and pole flanges by spiral winding with a bundle of unidirectional fibrous material. In this case, the power shell is applied with a continuous bundle to the cylindrical and bottom sections of a spherical shape with the loops of the neck of the flange covered by loops. The loop-like winding of the “flange sections” of the power shell leads to a sharp increase in the thickness of the latter in this zone and the appearance of a section with a negative curvature of its outer surface. This significantly reduces the structural bearing capacity due to the occurrence of additional bending stresses. Laboratory studies have fully confirmed this design flaw of the known balloon.

Also known is a method of winding the power shell of a high-pressure cylinder made of polymer composite materials and a high-pressure cylinder made of polymer composite materials according to the patent of England No. 1150131 from 04/30/69, NCI B8G; B5A, manual gearbox B65h 81/02.

When implementing the known method on a sealing liner consisting of a cylindrical part and sphere-shaped bottoms with pole flanges, spiral layers are wound with a ribbon of fibrous filaments, touching tapes of coils located on the bottoms of the necks of the pole flanges.

Known high-pressure cylinder made of polymer composite materials contains a liner and a power shell with pole holes made by winding a tape of fibrous filaments.

The disadvantage of this method is the low quality of the structure due to the low strength of the sealing site of the pole flange and the uneven tension of the threads when winding the tape in this area. When testing cylinders with ultimate pressure, the destruction of the power shell occurs along the bottom, with a focus in the neck region of the pole flange.

A disadvantage of the known design is the low reliability of its operation due to the low strength of the power shell in the zone of the pole hole and the uneven loading of the strands of tape in this zone. When testing cylinders with ultimate pressure, the destruction of the power shell occurs along the bottom, with a focus in the area from the pole hole.

The known method and known design, as the closest in technical essence and the achieved result, are selected as a prototype.

The technical problem to which the claimed invention is directed is the development and creation of high-quality high-pressure cylinders with increased reliability.

The technical result for the method that can be achieved by solving the problem is to improve the quality of manufacturing cylinders by improving the winding circuit of the power shell in its bottom, in the area adjacent to the neck of the pole flange.

The technical result for the device, which can be achieved by solving the problem, is to increase the reliability of its work by improving the reinforcement scheme of the power shell in the area of its pole hole.

The problem with the achievement of the technical result for the method is solved by the fact that spiral layers are wound on a sealing liner consisting of a cylindrical part and sphere-shaped bottoms with pole flanges, a ribbon of fibrous filaments, touching tapes of coils located on the bottoms of the necks of the pole flanges, while in accordance with the invention, the tape threads in the contact zone are bent in an arc, the tape is deformed to a circular bundle, and an crimp ring of the neck of the pole flange is formed with an array of filaments bent along the arc, In this case, the maximum length of threads for ring formation is determined by the formula:

где

Where

l is the maximum length of the threads to form a ring,

N - tape width, mm;

r is the radius of the neck of the pole flange, mm;

c = 1,02-1,25 - experimental coefficient, taking into account the change in the length of the thread from the "stranding" of the tape, depends on the tension of the tape, the viscosity of the binder, the deviation from the optimal arrangement of threads in the ring.

Distinctive features for the method are the following features:

- the tape threads in the touch zone are bent in an arc - the sign is significant, it involves the presence of new operations, it is aimed at solving the problem with achieving a technical result, improving the quality of manufacturing cylinders by improving the winding structure of the power shell in its bottom, in the adjoining zone to it the neck of the pole flange, aimed at increasing the strength of the power shell in this zone;

- deform the tape to a bundle of circular cross section - a significant sign, it requires new operations, aims to solve the problem with achieving a technical result, to improve the quality of manufacturing cylinders by improving the winding of the power shell in its bottom, in the area adjacent to the neck of the pole a flange aimed at increasing the strength of the power shell in this zone by reducing the unevenness of the tension of the threads during winding of the tape;

- an array of filaments bent along the arc forms a crimp ring of the neck of the pole flange, while the maximum length of the filaments for forming the ring is determined by the formula:

где

Where

l is the maximum length of the threads for the formation of the ring, mm;

N - tape width, mm;

r is the radius of the neck of the pole flange, mm;

c = 1.02-1.25 - an experimental coefficient that takes into account the change in the length of the thread from the “stranding” of the tape, depends on the tension of the tape, the viscosity of the binder, the deviation from the optimal location of the threads in the ring - a significant sign, it requires new operations and their new implementation , aimed at solving the problem with achieving a technical result, improving the quality of manufacturing cylinders by improving the winding circuit of the power shell in its bottom, in the area adjacent to the neck of the pole flange, aimed at increasing the strength of the power shell in this zone; to prove the significance of the feature described by the mathematical dependence, we consider Fig.6:

from the ADO triangle we have:

the length of the arc l _about in the area of the angle α of the circle 2πr is determined by the formula:

или l₀=0,01745 rα;

or l ₀ = 0.01745 rα;

substituting the expression for α from (1), we obtain:

the length of the arc l _{о is} determined without taking into account the thickness of the tape s, taking into account the thickness of the tape, the filaments bent along the arcs will be located equidistantly to the ABC arc within the thickness of the bundle and their length will be determined by the following formula:

The task is to achieve a technical result for the device is solved in that the container contains a liner and a power shell with pole holes made by winding a tape of fibrous filaments, in this case, in accordance with the invention, each pole hole is formed by the inner edge of the ring, made integral with the power a sheath from an array of filaments bent along an arc of bundles of circular cross-section, and the maximum length of these threads is determined by the formula:

где

Where

l is the maximum length of the strands of the ring, mm;

N - tape width, mm;

r is the radius of the pole hole, mm;

c = 1,02-1,25 - experimental coefficient, taking into account the change in the length of the thread from the "stranding" of the tape, depends on the tension of the tape, the viscosity of the binder, the deviation from the optimal arrangement of threads in the ring.

Distinctive features for the device are the following features:

- each pole hole is formed by the inner edge of the ring integral with the power shell - an essential feature, provides for the presence of a new element (ring), a new relationship (along with the power shell) and a new location (the inner edge of the pole hole), aimed at solving the problem with the achievement of a technical result, to increase the reliability of the work by improving the reinforcement scheme of the power shell in the area of its pole hole and thereby increase the strength of the material in hub zone;

- the ring is made of an array of strands of circular bundles bent along an arc - an essential feature, provides for the presence of new elements (array of strands), a new shape (curved in an arc) and a new arrangement (located in round bundles), aimed at solving the problem with achieving the technical result, to increase the reliability of the work by improving the reinforcement scheme of the power shell in the area of its pole hole;

- the maximum length of the threads is determined by the formula:

где

Where

l is the maximum length of the strands of the ring, mm;

N - tape width, mm;

r is the radius of the pole hole, mm;

c = 1.02-1.25 - an experimental coefficient that takes into account the change in the length of the thread from the “stranding” of the tape, depends on the tension of the tape, the viscosity of the binder, the deviation from the optimal location of the threads in the ring - a significant sign, provides a new ratio of sizes, is aimed at solving the task with the achievement of a technical result, to increase the reliability of the work by improving the reinforcement scheme of the power shell in the area of its pole hole; the evidence of the materiality of the feature described by the mathematical dependence is given in the evidence of the materiality of the features of the method.

These distinguishing features are significant, since each individually and all together are aimed at solving the problem with the achievement of technical results. The use of a single set of essential distinguishing features in the known solutions was not found, which characterizes the conformity of the technical solution to the criterion of "novelty."

A single set of new essential features with common known provides a solution to the problem with the achievement of technical results and characterizes the proposed technical solutions by significant differences compared with the prior art and analogues. These technical solutions are the result of research and experimental work to improve the reliability of high-pressure cylinders made of polymer composites without using known design solutions, recommendations, materials and are non-obvious, which indicates their compliance with the criterion of "inventive step".

The invention is illustrated by drawings, where Fig. 1 is a general view of a method for winding a power shell, Fig. 2 is a view of a zone of touching the neck of a pole flange with a tape, Fig. 3 is a sectional view of a tape located on the bottom of a liner, in Fig. 4 - section of a partially deformed tape near the neck of the pole flange, in Fig. 5 - section of a tape deformed into a bundle, in Fig. 6 - arrangement of a theoretical tape having no thickness in the contact zone with the neck of the pole flange, in Fig. 7 - general view of the balloon , Fig.8 is a longitudinal section of the edge of the pole hole ment, 9 - a cross-sectional view of the edge of the pole hole.

In the method of winding the power sheath 1 of a high-pressure cylinder 2 of polymer composite materials onto a sealing liner 3, consisting of a cylindrical part 4 and sphere-shaped bottoms 5 with pole flanges 6, spiral layers 9 are wound with a tape 7 of fibrous threads 8, touching tapes of coils located on the bottoms 5, the necks 10 of the pole flanges 6. The threads 8 of the tape 7 in the contact zone 11 are bent along the arc 12, deform the tape 7 to a bundle of circular cross section 13 and an array of 14 curved along the arc 12 threads 8 form a crimp ring 15 of the neck 10 of the pole flange 6, the ring 15 to form the maximum length of the filaments 8 is determined by the formula:

где

Where

l is the maximum length of the threads 8 to form the ring 15,

H - tape width 7, mm;

r is the radius of the neck 10 of the pole flange 6, mm;

c = 1.02-1.25 - the experimental coefficient, taking into account the change in the length of the thread from the "stranding" of the tape 7, depends on the tension of the tape Q, the viscosity of the binder, the deviation from the optimal location of the threads 8 in the ring 15.

The high-pressure cylinder 2 made of polymer composite materials contains a liner 3 and a power shell 1 with pole holes 16 made by winding a tape 7 of fibrous threads 8. Each pole hole 16 is formed by the inner edge 17 of the ring 15, made integral with the power shell 1 of the array 14 bent along an arc of 12 threads 8 tows of circular cross section 13, and the maximum length of these threads is determined by the formula:

где

Where

l is the maximum length of the threads 8 to form the ring 15,

H - tape width 7, mm;

r is the radius of the neck 10 of the pole flange 6, mm;

c = 1.02-1.25 - the experimental coefficient, taking into account the change in the length of the thread from the "stranding" of the tape 7, depends on the tension of the tape Q, the viscosity of the binder, the deviation from the optimal location of the threads 8 in the ring 15.

An embodiment of the method consists in the fact that a tape 7 of the power sheath 1 is wound on the liner 3, a crimp ring 15 of the neck 10 of the pole flange 6 is formed from an array of 14 threads 8 curved into an arc 12, and the arcs 12 of the threads 8 of different lengths, no more than l, are positioned in array 14 with overlaps for their additional fastening. Such a reinforcement scheme is ensured by the fact that the winding is carried out on a special machine with programmed control, and when winding the sealing zone of the pole flange 6, the program parameters are set so that the tape 7 approaches the neck 10 of the pole flange 6 until it touches the last thread 19 at point 20. In fact, it adjoins along arc 21. Also, in fact, strands 8 of length l and less are located in ring 15 with deviations, taken into account by coefficient c, from the optimality specified by the program.

The embodiment of the cylinder 2 is that the power shell 1 forms a ring 15 containing yarns 8 arcs 12, length l and less, located with an overlap 18. Studies have shown that when the arrangement of threads 8 arcs 12 with a maximum length less than l decreases the strength of the ring 15 in the circumferential direction, and more than l - the thickness of the power shell 1 in the zone of the ring 15 increases, and on the outer surface of the power shell 1, a section 22 with negative curvature is formed, which significantly reduces the strength of the balloon.

Cylinder 2 works as follows. When it is loaded with ultimate pressure in the zone of the pole hole, maximum stresses arise, and due to the optimal overlaps 18 of the threads 8 of the arcs 12 of the arcs 12 of the ring 15 located in the circumferential direction, these stresses do not reach the permissible ones.

Thus, the use of inventions will make it possible to create a high-pressure cylinder from polymer composites with increased reliability of its operation, which confirms the intended use. The feasibility of the invention is confirmed by the positive test results of samples and fragments of structures, the development and manufacture of which are completely based on the description provided. In this regard, the new technical solution also meets the criterion of "industrial applicability", i.e. level of invention.

Claims (2)

1. The method of winding the power shell of a high-pressure cylinder made of polymer composite materials, in which spiral layers are wound onto a sealing liner consisting of a cylindrical part and sphere-shaped bottoms with pole flanges, with tapes of fibrous filaments touching tapes of the turns located on the bottoms of the necks of the pole flanges characterized in that the tape threads in the contact zone are bent in an arc, the tape is deformed to a circular bundle, and an crimp ring of the pole neck is formed with an array of filaments bent along the arc ANCA, wherein the maximum length of the filaments is determined by the formula to form a ring

where l is the maximum length of the threads to form a ring, N - tape width, mm; r is the radius of the neck of the pole flange, mm; c = 1,02-1,25 - experimental coefficient, taking into account the change in the length of the thread from the "stranding" of the tape, depends on the tension of the tape, the viscosity of the binder, the deviation from the optimal arrangement of threads in the ring. 2. A high-pressure cylinder made of polymer composite materials, made by the method according to claim 1, containing a liner and a power shell with pole holes, made by winding a tape of fibrous filaments, characterized in that each pole hole is formed by the inner edge of the ring, made integral with the power a sheath of an array of strands of bends of circular cross section curved in an arc, and the maximum length of these threads is determined by the formula

where l is the maximum length of the strands of the ring, mm; N - tape width, mm; r is the radius of the pole hole, mm; c = 1,02-1,25 - experimental coefficient, taking into account the change in the length of the thread from the "stranding" of the tape, depends on the tension of the tape, the viscosity of the binder, the deviation from the optimal arrangement of threads in the ring.

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