Carrier pipe casing in the form of rotation of a body made of composite materials, method and tool for its manufacture

 

(57) Abstract:

Usage: the invention relates to the field of engineering, namely to the shell structures of body parts used in aviation, rocket technology, working in difficult conditions - stress state, methods and mandrels for their manufacture. The inventive carrier tube-shell contains a wire frame made of repeating the thickness of the layer systems of intersecting spiral and annular strips forming the ribs with crosshairs and outer cover layers respectively made of unidirectional fibers, bonded utverzhdennym polymeric binder. Between layers placed damper-absorbing layers of elastic material such as rubber, polyurethane. A method of manufacturing a pipe coating includes the introduction of an intermediate continuous molding tape under stacked layers under tension. The proposed frame contains intermediate molding strips of elastic material, the duplicated with ribbons and placed in mutually intersecting grooves. 3 S. p. f-crystals, 8 ill.

The invention relates to the field of engineering, namely obolochek stress state, methods and mandrels for their manufacture.

Known tube-shell in the form of rotation of a body made of composite materials containing shell and the structural frame of the honeycomb structure formed by criss-crossing spiral and annular strips (U.S. patent N 3083864, CL 220-83, 1963).

Also known carrier tube-shell in the form of rotation of a body made of composite materials containing the structural frame of the cellular structure of overlapping unidirectional filaments and outer covering layers (U.S. patent N 4137354, CL 428-116, 1979).

The disadvantages of the casing pipe is reduced stiffness and strength due to local buckling, excessive stress concentration between the layers of reinforcing material in the ribs because of the lack of solidity and continuity of the cured polymeric material. Such pipe coating to ensure reliability in difficult conditions-stress state while loading in compression, bending and torsion require additional hardening and have a higher mass.

The closest in technical essence analogue is a tube-shell in the form of rotation of a body of the composition career is tenki layers of overlapping systems of spiral and annular strips, forming ribs with crosshairs, with an external covering layers respectively made of unidirectional fibers, bonded utverzhdennym polymeric binder (U.S. patent N 4284679, CL 428-218, 1981).

The specified carrier tube-shell selected as a prototype, has similar disadvantages, low resistance to powerful acoustic effects.

A known method of manufacturing a tube-shell cellular structure made of composite materials, including spiral-cross and a ring winding unidirectional yarns, impregnated with a binder (U.S. patent N 3083864, CL 220-83, 1963).

A known method of manufacture of the casing pipe of the layered structure of composite materials, including installation, the mandrel formoobrazuyuschimi elements of rubber-like material and forming between them a grid of mutually intersecting grooves, laying them in overlapping unidirectional yarns, impregnated with a binder, to form ribs winding ribbon tension of the outer covering layers and heat treatment with subsequent extraction of the mandrel and forming elements (U.S. patent N 4137354, CL 428 - 116, 1979).

Known methods is, valinoti ribs, which leads to the loss of their stability.

The method according to U.S. patent N 4137354 technologically difficult because of the many operations associated with the installation and removal of a large number of molding elements.

The closest in technical essence to the invention is a method of manufacturing a pipe coating, including coating of the core of a rubbery material with intersecting grooves, laying in the grooves intersecting spiral and annular strips of unidirectional yarns, impregnated with a polymeric binder to form the skeleton of the cellular structure, causing them forming elements and heat treatment with subsequent extraction of the core and rubber-like coating (U.S. patent N 4284679, CL 428-218, 1981).

This way as the closest analogue is selected as a prototype. The disadvantages of the method include uneven crimping ribs forming elements, which reduces the quality of the finished product.

Famous mandrel for the manufacture of the casing pipe honeycomb structure made of composite materials containing frame with formative elements of rubber-like material with mesh is aimed threads, impregnated with a binder (U.S. patent N 4137354, CL 428-116, 1979).

The disadvantages of the known clamps are its complexity, greater complexity of manufacturing, increased time required for its Assembly and disassembly.

Closest to the technical essence is a mandrel for U.S. patent N 4284679, CL 428-218, 1981, intended for the manufacture of the casing pipe honeycomb structure made of composite materials containing the core and covering his rubbery material with intersecting grooves for laying them in the intersecting spiral and annular strips of unidirectional filaments for the formation of the ribs of the frame pipe coating, with the same drawbacks. This mandrel is selected as a prototype.

The main task, which directed the claimed invention is the development of this design carrier pipe coating in the form of rotation of a body made of composite materials, method and tool for its manufacture, which would ensure its reliable operation in difficult conditions-stress state with the simultaneous action of stress on compression, bending, increased resistance to powerful acoustic effect, kept the sound on what Temotu to such effect.

The technical result that can be obtained by carrying out the invention, is to increase the strength, stiffness and reliability of the carrier pipe coating.

The problem is solved and the technical result is achieved due to changes in the structure of the power frame of the carrier pipe coating, injection method, simultaneously with the laying of intersecting spiral and annular strips intermediate forming elements, a corresponding change to the design covering the core rubber-like material.

For this purpose the carrier pipe casing in the form of rotation of a body made of composite materials containing the structural frame of the honeycomb structure formed from recurring in the wall thickness of the layers of systems of intersecting spiral and annular strips forming the ribs with crosshairs, with an external covering layers respectively made of unidirectional fibers, bonded polymeric binder, its structure of power supplied is placed between the layers of systems of intersecting spiral and annular strips, forming his ribs, duplicated them on the width of the ribs, including the transition edges between the number what cremental attenuation of sound waves, for example, the type of rubber, polyurethane, with the location of the threads of the outer covering layers at an angle of 80-90oto the axis of symmetry of the shell.

In the method of manufacturing a pipe coating, including coating of the core of a rubbery material with vzaimoperesekajushchiesja grooves, laying in the grooves intersecting spiral and annular strips of unidirectional yarns, impregnated with a polymeric binder to form the skeleton of the cellular structure, causing them forming elements and trevorrow with subsequent extraction of the core and rubbery coating between the layers of systems of intersecting spiral and annular strips when they are laying in specific areas administered under the stacked strips of unidirectional filaments intermediate mass elements in the form of continuous strips of elastic material such as rubber, polyurethane, with the application of external molding elements for compression in the form of threads with positioning them at an angle of 80-90oto the axis of symmetry of the core.

In the mandrel for the manufacture of pipes-shell containing the core and covering his rubbery material with intersecting grooves for laying them in overlapping spiral is that the core is a rubbery material is placed in the grooves intersecting spiral and ring belt with transitions between the circular ribbon, duplicated with intermediate forming continuous strips of elastic material such as rubber, polyurethane.

Distinctive features of the carrier pipe coating are the following features:

the supply of power to the damper frame-absorbing layers,

of elastic material with a high damping ratio of the sound waves, such as rubber, polyurethane,

sandwiched between systems of intersecting spiral and annular strips forming the edges of the frame,

duplicated with them on the width of the ribs,

including, and transient stiffeners between ribs,

the location of the threads of the outer covering layers at an angle of 80 - 90oto the axis of symmetry of the shell.

Distinctive features of the method of manufacturing a tube-shell are the symptoms:

the introduction of the intermediate forming elements,

in the form of continuous strips of elastic material such as rubber, polyurethane,

between the layers of systems perceivedas spiral and annular strips when they are laying in specific areas under the stacked strips of unidirectional filaments,

the application of external formooborota.

Distinctive features of the mandrel for the manufacture of pipe coating are signs:

supply covering the core rubber-like material of the intermediate forming elements,

in the form of continuous strips of elastic material such as rubber, polyurethane,

the duplicated layers of systems of intersecting spiral and annular strips of unidirectional filaments,

posted in mutually intersecting grooves and transitions between the ring grooves.

These distinctive features of the carrier pipe coating, method and tool for manufacturing are essential features, because each of them separately and together with the other aims at the implementation of the decisions of the task and the achievement of the technical result, the exclusion of any of them does not allow to solve the problem.

For example, the exception damper-absorbing layers between the layers of the power frame pipe coating, introducing intermediate forming elements when laying the tape method and the mandrel for the manufacture does not allow to solve the problem and achieve new technical result.

Ispolzova equipment, the analogues and the prototype was not detected, indicating their novelty and allows to characterize the proposed technical solution according to their criterion of "novelty".

One set of new essential features of a General known in the carrier pipe casing, the method and the tool for its manufacture can solve the problem and achieve a new technical result is to enable the production of large-size bearing of the casing pipe is 2.5 m or more from composite materials. This allows to characterize the proposed technical solutions are significant differences from the prior art, analogs and prototypes, are the results of experimental research and creative contribution, technological solutions created without the use of standard guidelines normative document, any known methods in this field, which indicates conformity with the criterion of "Inventive step".

In Fig. 1 presents a General view of the carrier pipe coating in the form of rotation of a body made of composite materials; Fig.2 a view of the casing pipe from the side; Fig.3 typical structure of layers of overlapping spiral and ring of the damper-absorbing elements in the ribs; in Fig. 5 the mandrel for the manufacture of pipe wrapper; Fig.6 is an axial cross-section of the mandrel in an enlarged scale; Fig.7 a fragment of a rubber-like coating with a system of intersecting spiral and annular grooves; Fig.8 typical layout covering the core material of the intermediate forming bands of elastic material.

Carrier jacket pipe made in the form of rotation of a body made of composite materials, contains the main frame 1 of the honeycomb structure and the outer covering layers 2 (Fig.1,2). Main frame 1 is made of repeating the wall thickness of the layers 3 systems of intersecting spiral and annular strips 4,5 forming ribs 6,7 with crosshairs 8,9,10. Spiral and annular tape 4,5, external covering layers 2 made of unidirectional filaments 11, fastened utverzhdennym binder 12. Main frame 1 of the honeycomb structure provided with placed between layers 3 systems of intersecting spiral and annular strips 4,5 forming his ribs 6,7 with crosshairs 8,9,10, duplicated them on the width of the ribs 6,7, including transitional ribs 13 between the annular ribs 7, the damper-absorbing layer 14 upregulates 11 external covering layer 2 at an angle of 80-90oto the axis of symmetry of the shell.

In the power frame 1 cross 8,9,10 and ribs 6,7,13, recurring throughout its length, form a rigid structure, a reinforced external covering layers 2, providing with it the reliable operation of pipe coating in difficult conditions-stress state. The presence of damping-absorbing layer 14 sandwiched between 3 systems of intersecting spiral and annular strips 4,5 forming ribs 6,7 with crosshairs 8,9,10, provides an effective perception of the power frame 1 increased resistance pipe coating to a powerful acoustic effect of sound waves due to their absorption and scattering.

To ensure that the carrier pipe coating proposed by the mandrel contains the core 15 and covering his rubbery material 16 with intersecting grooves 17,18,19 for laying them in the intersecting spiral and annular strips 4,5 of unidirectional filaments 11 to form ribs 6,7,13 with crosshairs 8,9,10 power frame 1. Rubber-like material 16 covering the core 15 contains placed in the grooves 17, 18, 19, intersecting spiral and annular tapes 4, 5 and intermediate continuous formoobrazuyuschimi with a reinforcing tape 4, 5 so that the thread 11 is firmly bonded to the elastic material and with neighboring layers 3 a polymeric binder 12.

The carrier casing pipe in the form of rotation of a body made of composite materials are made as follows.

At the core 15 establish and fix it covers its flexible rubber-like material 16 made with intersecting grooves 17, 18, 19, then the core 15 is set on the winding device (not shown) and produce packing in the grooves 17, 18, 19 intersecting spiral and annular strips 4, 5 of unidirectional filaments 11, impregnated with a polymeric binder 12, between layers 3 systems of intersecting spiral and annular strips 4, 5 transitions ribs 13 between the annular bands 5 enter the intermediate continuous forming tape 20 of elastic material is rubber, polyurethane, in the process of forming subsequent layers 3 under the action of the tension on the tape 4,5 partially cut into the elastic material. Intermediate continuous forming tape 20 provide additional podpisovanie impact on layers 3 systems of intersecting spiral and annular strips 4, 5 at their subsequent inflicted is the Rial 16, winding on top of the covering rubber-like material 16 unidirectional threads 11 for formation of the external covering layer 2, creating external podpisovanie impact on layers 3. The mandrel with the received workpiece is placed in a chamber for curing a polymeric binder 12 and simultaneous continuous vulcanization molding strips 20 and modes of curing a polymeric binder 12. However, where respectively applied polymer binder and put elastic material 20, unidirectional filaments are firmly fastened to each other and with the specified layers. After curing the preform core 15 and covering his rubber-like material 16 is removed from the resulting product. Continuous forming tape 20 remain in the ribs 6, 7, 13 of the frame 1 and form them in the damper-absorbing layer 14 of elastic material.

The use of the proposed technical solution is as follows.

Produced specimens, their fragments. As a starting material was used coal dust Chis 5000 (GOST 28008-88) and polymer binder EDMS-MK (OST 3-4759-80). The width of the ribbon was chosen in the range 4-10 mm, number of filaments 4-6 PCs Weight of the impregnated tape CLASS="ptx2">

Carrier pipe casing in the form of rotation of a body made of composite materials, parts, manufactured using new technical solutions were tested in difficult conditions-stress state and powerful acoustic impact sound waves. The test results are positive. Fabrication of full-scale and pilot samples confirmed the efficacy and advisability of making self-supporting pipe shells made of composite materials through industrial processes.

Therefore, new technical solutions meet the criterion of "Industrial applicability".

1. Carrier jacket pipe made of composite materials containing the structural frame of the honeycomb structure formed from recurring in the wall thickness of the layers of systems of intersecting spiral and annular strips forming the ribs with crosshairs, with an external covering layers respectively made of unidirectional fibers, bonded utverzhdennym polymeric binder, characterized in that its structure of power supplied is placed between the layers of systems of intersecting spiral and annular strips, forming his ribs, duplicated them on serierum layers of elastic material with a high damping ratio of the sound waves type of rubber, polyurethane, with the location of the threads of the outer covering layers at an angle 80 90oto the axis of symmetry of the shell.

2. A method of manufacturing a carrier pipe blalock of composite materials, including coating of the core is a rubbery material with intersecting grooves, laying in the grooves intersecting spiral and annular strips of unidirectional yarns, impregnated with a polymeric binder to form the skeleton of the cellular structure, causing them forming elements and heat treatment with subsequent extraction of the core and rubbery coating, characterized in that between the layers of systems of intersecting spiral and annular strips when they are laying in specific areas administered under the stacked strips of unidirectional filaments intermediate mass elements in the form of continuous strips of elastic material such as rubber, polyurethane, with the application of external molding elements for compression in the form of threads with positioning them at an angle 80 90oWith the axis of symmetry of the core.

3. The mandrel for the manufacture of the carrier pipe shell made of composite materials containing the core and covering his rubbery material Savannah threads for the formation of the ribs of the frame pipe coating, characterized in that the covering core rubber-like material is placed in the grooves, intersecting spiral and ring belt with transitions between the circular ribbon in the intermediate continuous formative bands of elastic material such as rubber, polyurethane between them, the duplicated with ribbons.

 

Same patents:

The invention relates to the construction of pipelines, mechanical engineering and can be used in the manufacture of containers, fuselage and other shell-type structures, in particular in the protective shells made of composite materials

The invention relates to mechanical engineering and can be used in reinforced pipe shell ultra high pressure, in particular in pipes-shells made of composite materials

The invention relates to the production of plastic pipes, reinforced with metal or other frame, which can be used for manufacture of pipelines used for transportation of liquid and gaseous environments, including having corrosive properties, at a gauge pressure, vacuum and temperature fluctuations

The invention relates to the manufacture of laminated plastics, in particular, foiled dielectrics that can be used, for example, to obtain substrates of printed circuit boards

The invention relates to the production technology of layered products and can be used in the manufacture of chemically resistant inner walls of containers for the transport of chemically aggressive liquids

The invention relates to the technology of the lining sleeve for repair of internal surfaces of piping and pseudoprotocol for various purposes, for example for water supply, Sewerage, heating

The invention relates to the field of recycling of tires and the production of building structures, such as pipes for various purposes, such as drainage, Sewerage, pipes for road transportation, etc
Up!