Heat-shielding material

FIELD: textile, paper.

SUBSTANCE: heat-shielding material is made of a shaped layer of aramid fibre of non-woven structure with diametre of fibre from 1 to 10 nm, laid between two layers of rubber mix on the basis of ethylene-propylene rubber with further curing in item composition.

EFFECT: invention makes it possible through usage of new nanofibre filler to solve the problem of its recycling on completion of item life cycle.

1 dwg, 1 tbl

 

The invention relates to thermal insulation materials based on heat resistant ethylene-propylenediene rubbers that can be used in aircraft and rocket science.

Known heat-shielding material AR-998 THE 38.1051211-83-prototype. The known material is a composition comprising a heat-resistant reinforcing filler of asbestos fabric ALT-6 GOST 6102-72 with 2-sided coating of rubber composition on the basis of synthetic ethylene-propylenediene rubber stamps 51-2110 THE 38.10551177-88.

A significant disadvantage of this material is that in the process of recycling (thermal processing) products that have completed their useful life, remains ash to asbestos dust (hazard class 1)which environmental readings shall be either disposed of or recycled to the technical indicators, allowing its use in the manufacture of asbestos products.

To this drawback are added.

- the complexity of technology for rubber-reinforced material in connection with the necessity of making a special adhesive rubber 51-2110 method of swelling in toluene (toxic organic solvent, 3 hazard class);

low elongation heat-shielding material AR-998, which degrades the characteristics of the deformation of the product as a whole.

T is nicesly object of the invention is to eliminate this drawback.

The technical result is achieved in that the heat-shielding material capable of environmentally friendly recycling part of the product aircraft, rocket, made of formed layer of aramid fiber non-woven structure with a fiber diameter of 1 to 10 nm, sandwiched between two layers of rubber mixtures based on ethylene-propylenediene rubber and subsequent vulcanization in the composition of the product.

Introduction aramid fiber allows implementation of environmentally friendly recycling process in the composition of the product (without bottom ash asbestos) and collectively improved physical and mechanical properties of the claimed protective material.

The drawing shows derivatograph aramid fiber, where

THE curve of fly ash mass;

DTG - speed ash mass;

The DTA rate of change of enthalpy.

Thermal insulation material made by the method of duplication on the tables with heating from 50 to 60°C. the Cloth of aramid fiber non-woven patterns ("Putinka") pre-soaked in alcohol-acetone mixture (ratio 1:1), dried in air for 30 to 40 min and laid between two layers of rubber compound 51-2110 (layer thickness from 0,6 up to 1 mm), short of pressing roller to gain no more than 0.5 MPa. Then duplicated by the above technology-material (arm-H is -998) subject to cutting into pieces for placement in Assembly units (bottoms, ends, caps) according to the technical requirements of design documentation.

Vulcanization heat-shielding material is provided independently by the combined mode with other heat-insulating materials in the composition of Assembly units at a temperature of from 145 to 155°C and pressure P≥1,0 MPa. Comparative evaluation of physical-mechanical and thermal characteristics presented in the table.

When thermal decomposition of aramid fiber (drawing) of the characteristic decomposition temperature corresponds to 500°C. Aramid fiber, decomposing into low molecular weight components, evaporates, and the remainder is a fine carbon product, coke deposited on the heat-shielding material.

Application in thermal insulation material new nanocolonies filler above composition can solve the problem of its disposal at end of product life cycle.

No.IndicesMaterial
AR-998AWS-OT-998
1Density, kg/m31100 900-1000
2Elongation, %
on the basis, ≥8410
(when the thickness of the rubber 1 mm)
on a duck,≥10260
(when the thickness of the rubber 0.6 mm)
3Coefficient of thermal conductivity, λ, W/m·K0,290,142
4The coefficient of thermal diffusivity, a·107m2/c1,590,85-1,20
5Specific heat capacity, kJ/kg·K1,661,75
6The remainder termorasshirennyi, g/m23400

Thus, more environmentally friendly thermal insulation material comprising heat-resistant reinforcing filler of aramid is Alekna nonwoven structure, has, along with environmental benefits, improved technical indicators shown in the table.

Heat-shielding material capable of environmentally friendly recycling part of the product aircraft, rocket, made of formed layer of aramid fiber non-woven structure with a fiber diameter of 1 to 10 nm, sandwiched between two layers of rubber mixtures based on ethylene-propylenediene rubber and subsequent vulcanization in the composition of the product.



 

Same patents:

FIELD: machine building.

SUBSTANCE: thermal power cooled wall construction of high-temperature air-gas path element includes metal shell with cooling agent channels arranged in it. Shell is equipped on the path side with heat insulating screen adjacent to it. Screen is installed in shell as to seating with tightness and has grooves separated with ribs on the side of mating surface. Screen is made from heat-resistant composite material of carbon - carbon type or carbon - silicone carbide type or from metal of fekhral type.

EFFECT: wall construction provides effective cooling, decrease of temperature and thermal stresses in its elements, which allows producing light and reliable power machines and thermal units having the required running hours for various branches of engineering.

8 cl

FIELD: medicine, fire fighting equipment.

SUBSTANCE: invention refers to protection of objects flammable or failing under mechanical impact or vibration, and can be used for explosives storage or transportation. A fire- and heat-resisting compositional system contains a lidded power assembly container housing enclosing an object to be protected along the outer contour, and a thermal component. Besides in the interfaces of the mating fragments of the power assembly housing and the lid, there is a thermal ring cell made of a reinforced polymer composite wherein the reinforcing element represents a fibreglass tape wound round the contour of the interface of the housing components and spaced in a cured epoxy binding agent in the offered ratio. The method for making the fire- and heat-resisting compositional protection system presents a pre-fabrication technology as said thermal component made of said reinforcing tape composite and binding agent to produce a material blank.

EFFECT: better fire- and heat-resistance indices due to reduced heat loss in the interfaces of the power housing components, higher axial compression strength due to higher bonding strength of the binding agent and reinforcing element.

3 cl, 2 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: micro-porous heat-insulating material is made out of pyrogenic silicon dioxide, glass fibre, and powder-like damper corresponding to titanium dioxide of silicon carbide; additionally material contains sintering additive in form of amorphous boron. The procedure for production of the said material consists in crumbling glass fibre, in introducing pyrogenic silicon dioxide, powder-like damper and sintering additive, in mixing in a mixing installation, in charging produced mixture into a mould, in dry pressing and in high temperature burning at temperature 850-1000°C during 2-4 hours. Components are mixed in the mixing installation of an anchor-blade type at shaft revolution speed 500-1000 rev/min during not more, than 20 min. The mixing installation consists of a cylinder case with a conic bottom and of a shaft with blades mounted coaxially to the case. An anchor is additionally attached to the shaft; the anchor forms gaps of 20 and 4 mm between a vertical wall of the case and the case bottom. The blades are inclined to horizon line at angle 85° in the direction of shaft rotation.

EFFECT: raised strength characteristics of micro-porous heat-insulating material without essential deterioration of its thermo-physical properties.

3 cl, 2 dwg, 1 tbl, 4 ex

FIELD: machine building.

SUBSTANCE: procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing -rotating body of a cylinder shape or a pipe-casing of a composed structure. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. A layer of heat insulation is poured. Further mixture is conditioned; and process plugs are removed. The set of pipe diminishing pieces is made within the range of diametre values of working pipe branches with smaller diametre from 25 to 230, mainly from 32 to 219 mm and selectively correlating to them branches of the working pipe of bigger diametre within the range from 35 to 435, mainly from 45 to 426 mm. Thus there are created from two to ten, preferably, to six combinations of the latter with the same branch of the working pipe of smaller diametre. Also for the diminishing piece with branches of the working pipe of bigger diametre within range from 45 to 60 mm the pipe diminishing piece has hydro-insulation of a circular-cylinder configuration with invariable external diametre along whole length of a heat-insulated part of the diminishing piece. Notably, volume of the least heat insulated section is protected with the heat insulated layer. Specific volume protection of the latter related to a unit of payload volume of conditional running metre of a corresponding branch is not less, than 4.0. Interval change from 12.5-1.0 to 2.5-0.6 of volume protection of the working pipe with heat-insulating material is facilitated for pipe diminishing pieces with hydro-insulation in form of composed shape casing. The first interval is ratio of specific volume of heat insulation to a unit of payload volume of conditional running metre of the smallest diametre of the working pipe branch connected in the diminishing piece, while the second interval is the same for the branch of a bigger diametre. The complete set of items for the heat-hydro-insulated pipeline includes items each consisting of the working pipe, of the layer of heat insulation and of external hydro-insulation. It also includes the set of pipe diminishing pieces Notably, each diminishing piece with hydro-insulation in form of the pipe-casing is conditionally identical to shape of the diminishing piece with diametre exceeding relative diametres of the said working pipe diminishing piece by thickness required and sufficient to the protective layer of heat insulation arranged underneath; also the layer is formed out of two-component foamed solidificated mixture of calculated density in the middle of the layer not less, than 60 kg/m3. The complete set is equipped with wires of the on-line remote control system.

EFFECT: versatility, process simplicity and efficiency of fabrication.

24 cl, 17 dwg

FIELD: machine building.

SUBSTANCE: procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing -rotating body of a cylinder shape or a pipe-casing of a composed structure. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. A layer of heat insulation is poured. Further mixture is conditioned; and process plugs are removed. The set of pipe diminishing pieces is made within the range of diametre values of working pipe branches with smaller diametre from 25 to 230, mainly from 32 to 219 mm and selectively correlating to them branches of the working pipe of bigger diametre within the range from 35 to 435, mainly from 45 to 426 mm. Thus there are created from two to ten, preferably, to six combinations of the latter with the same branch of the working pipe of smaller diametre. Also for the diminishing piece with branches of the working pipe of bigger diametre within range from 45 to 60 mm the pipe diminishing piece has hydro-insulation of a circular-cylinder configuration with invariable external diametre along whole length of a heat-insulated part of the diminishing piece. Notably, volume of the least heat insulated section is protected with the heat insulated layer. Specific volume protection of the latter related to a unit of payload volume of conditional running metre of a corresponding branch is not less, than 4.0. Interval change from 12.5-1.0 to 2.5-0.6 of volume protection of the working pipe with heat-insulating material is facilitated for pipe diminishing pieces with hydro-insulation in form of composed shape casing. The first interval is ratio of specific volume of heat insulation to a unit of payload volume of conditional running metre of the smallest diametre of the working pipe branch connected in the diminishing piece, while the second interval is the same for the branch of a bigger diametre. The complete set of items for the heat-hydro-insulated pipeline includes items each consisting of the working pipe, of the layer of heat insulation and of external hydro-insulation. It also includes the set of pipe diminishing pieces Notably, each diminishing piece with hydro-insulation in form of the pipe-casing is conditionally identical to shape of the diminishing piece with diametre exceeding relative diametres of the said working pipe diminishing piece by thickness required and sufficient to the protective layer of heat insulation arranged underneath; also the layer is formed out of two-component foamed solidificated mixture of calculated density in the middle of the layer not less, than 60 kg/m3. The complete set is equipped with wires of the on-line remote control system.

EFFECT: versatility, process simplicity and efficiency of fabrication.

24 cl, 17 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly to procedures of fabricating heat-hydro-insulated diminishing pieces used for connecting pipelines of different diametres. Procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing of a composed structure conditionally similar by shape to working pipe subs. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. At least two-component foamed solidificated mixture is poured as a layer of heat insulation. Further mixture is conditioned; and process plugs are removed. The set of diminishing pieces is fabricated within the range of values of diametres of working pipe branches of smaller diametre from 200 to 950, mainly from 219 to 920 mm and within the range of values of diametres of working pipe branches of bigger diametre from 250 to 1050, mainly from 273 to 1020 mm. The set of diminishing pieces of working pipe branches of smaller diametre selectively correlates to the set of diminishing pieces of working pipe branches of bigger diametre. There are made from one to ten, preferably, to five combinations of the latter with the same branch of the working pipe of smaller diametre. There is facilitated volume protection of the working pipe with heat-insulating material. Volume protection is calculated from ratio of specific volume of heat-insulation to a unit of payload volume of a conditional running metre of the working pipe of each branch connected with a diminishing piece not over 1.4 at the section of diminishing piece of smaller diametre, and not below 0.25 at the section of bigger diametre. Also at least part of pipe diminishing pieces hydro-insulated with polymer or polymer containing material is designed to facilitate volume protection of the working pipe calculated from ratio of specific volume of hydro-insulation to a unit of payload volume of conditional running metre of the working pipe of each branch connected in the diminishing piece not over 0.17 at the section of diminishing piece of smaller diametre, and not below 0.08 at the section of bigger diametre. The complete set of items for the heat-hydro-insulated pipeline consists of items each containing a working pipe or branches of the working pipe, of a layer of heat insulation and of external hydro-insulation. Further, the complete set includes the set of pipe diminishing pieces fabricated according the above described procedure. Each diminishing piece contains a sub of working pipes, and hydro-insulation in kind of a pipe-shell of a complex form conditionally identical to the sub of working pipes in diametre correspondingly exceeding diametres of the said subs of the working pipes at thickness required and sufficient for underneath placement of a protective layer of hydro-insulation. This protective layer of heat-insulation consists of at least two-component foamed solidificated mixture. In the middle of the layer this mixture has calculated density not less, than 60 kg/m3. The complete set is equipped with wires of the on-line remote control system.

EFFECT: facilitating versatility, process simplicity and efficiency of items production, design of which ensures reduced heat losses and increased reliability of pipeline operation in whole.

25 cl, 16 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly to procedures of fabricating heat-hydro-insulated diminishing pieces used for connecting pipelines of different diametres. Procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing of a composed structure conditionally similar by shape to working pipe subs. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. At least two-component foamed solidificated mixture is poured as a layer of heat insulation. Further mixture is conditioned; and process plugs are removed. The set of diminishing pieces is fabricated within the range of values of diametres of working pipe branches of smaller diametre from 200 to 950, mainly from 219 to 920 mm and within the range of values of diametres of working pipe branches of bigger diametre from 250 to 1050, mainly from 273 to 1020 mm. The set of diminishing pieces of working pipe branches of smaller diametre selectively correlates to the set of diminishing pieces of working pipe branches of bigger diametre. There are made from one to ten, preferably, to five combinations of the latter with the same branch of the working pipe of smaller diametre. There is facilitated volume protection of the working pipe with heat-insulating material. Volume protection is calculated from ratio of specific volume of heat-insulation to a unit of payload volume of a conditional running metre of the working pipe of each branch connected with a diminishing piece not over 1.4 at the section of diminishing piece of smaller diametre, and not below 0.25 at the section of bigger diametre. Also at least part of pipe diminishing pieces hydro-insulated with polymer or polymer containing material is designed to facilitate volume protection of the working pipe calculated from ratio of specific volume of hydro-insulation to a unit of payload volume of conditional running metre of the working pipe of each branch connected in the diminishing piece not over 0.17 at the section of diminishing piece of smaller diametre, and not below 0.08 at the section of bigger diametre. The complete set of items for the heat-hydro-insulated pipeline consists of items each containing a working pipe or branches of the working pipe, of a layer of heat insulation and of external hydro-insulation. Further, the complete set includes the set of pipe diminishing pieces fabricated according the above described procedure. Each diminishing piece contains a sub of working pipes, and hydro-insulation in kind of a pipe-shell of a complex form conditionally identical to the sub of working pipes in diametre correspondingly exceeding diametres of the said subs of the working pipes at thickness required and sufficient for underneath placement of a protective layer of hydro-insulation. This protective layer of heat-insulation consists of at least two-component foamed solidificated mixture. In the middle of the layer this mixture has calculated density not less, than 60 kg/m3. The complete set is equipped with wires of the on-line remote control system.

EFFECT: facilitating versatility, process simplicity and efficiency of items production, design of which ensures reduced heat losses and increased reliability of pipeline operation in whole.

25 cl, 16 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly to procedures of fabricating heat-hydro-insulated diminishing pieces and to designs of heat-hydro-insulated diminishing pieces proper. Procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing of a composed structure conditionally similar by shape to working pipe subs. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. At least two-component foamed solidificated mixture is poured as a layer of heat insulation. Further mixture is conditioned; and process plugs are removed. Set of pipe diminishing pieces is fabricated within ranges of values of diametres of working pipe branches with smaller diametres from 200 to 950, preferably, from 219 to 920 mm and selectively correlating to them in ranges of diametres of working pipe branches with bigger diametres from 250 to 1050, preferably, from 273 to 1020 mm. Thus there are created combinations of from one to ten, preferably, to five diminishing pieces with the same branch of the working pipe of smaller diametre. Also there is facilitated volume protection of working pipe with heat-insulating material. Volume protection is calculated from ratio of specific volume of heat-insulation to a unit of payload volume of conditional running metre of the working pipe of each branch connected in a sub at the section of change from smaller diametre - not above 1.4, and not below 0.25 at the section of bigger diametre. Also, at least part of pipe diminishing pieces with ratio of diametres of the pipe-casing bigger to smaller from 1.29 are made with hydro-insulation in form of a casing of complex structure out of work-pieces of the pipe-casings of bigger and smaller diametres by means of cutting. For this purpose cylinder not-flat wedges are cut out in a near-end zone of the branch of bigger diametre. Between each two nearest cuts there is left a cylinder blade. Side facets of adjacent blades are joined, mainly, by welding, and the branch of smaller diametre is connected, mainly, by welding. The complete set of items for the heat-hydro-insulated pipeline includes items each consisting of the working pipe or branches of the working pipe, of the layer of heat insulation and of external hydro-insulation. It also includes the set of pipe diminishing pieces. Notably, each diminishing piece contains sub of working pipes with hydro-insulation in form of the pipe-casing exceeding relative diametres of the said working pipe diminishing piece by thickness required and sufficient to the protective layer of heat insulation arranged underneath; also the layer is formed out of two-component foamed solidificated mixture of calculated density in the middle of the layer not less, than 60 kg/m3. The complete set is equipped with wires of the on-line remote control system.

EFFECT: facilitating versatility, process simplicity and efficiency of production.

25 cl, 16 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly to procedures of fabricating heat-hydro-insulated diminishing pieces and to designs of heat-hydro-insulated diminishing pieces proper. Procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing of a composed structure conditionally similar by shape to working pipe subs. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. At least two-component foamed solidificated mixture is poured as a layer of heat insulation. Further mixture is conditioned; and process plugs are removed. Set of pipe diminishing pieces is fabricated within ranges of values of diametres of working pipe branches with smaller diametres from 200 to 950, preferably, from 219 to 920 mm and selectively correlating to them in ranges of diametres of working pipe branches with bigger diametres from 250 to 1050, preferably, from 273 to 1020 mm. Thus there are created combinations of from one to ten, preferably, to five diminishing pieces with the same branch of the working pipe of smaller diametre. Also there is facilitated volume protection of working pipe with heat-insulating material. Volume protection is calculated from ratio of specific volume of heat-insulation to a unit of payload volume of conditional running metre of the working pipe of each branch connected in a sub at the section of change from smaller diametre - not above 1.4, and not below 0.25 at the section of bigger diametre. Also, at least part of pipe diminishing pieces with ratio of diametres of the pipe-casing bigger to smaller from 1.29 are made with hydro-insulation in form of a casing of complex structure out of work-pieces of the pipe-casings of bigger and smaller diametres by means of cutting. For this purpose cylinder not-flat wedges are cut out in a near-end zone of the branch of bigger diametre. Between each two nearest cuts there is left a cylinder blade. Side facets of adjacent blades are joined, mainly, by welding, and the branch of smaller diametre is connected, mainly, by welding. The complete set of items for the heat-hydro-insulated pipeline includes items each consisting of the working pipe or branches of the working pipe, of the layer of heat insulation and of external hydro-insulation. It also includes the set of pipe diminishing pieces. Notably, each diminishing piece contains sub of working pipes with hydro-insulation in form of the pipe-casing exceeding relative diametres of the said working pipe diminishing piece by thickness required and sufficient to the protective layer of heat insulation arranged underneath; also the layer is formed out of two-component foamed solidificated mixture of calculated density in the middle of the layer not less, than 60 kg/m3. The complete set is equipped with wires of the on-line remote control system.

EFFECT: facilitating versatility, process simplicity and efficiency of production.

25 cl, 16 dwg

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly to procedures of fabricating heat-hydro-insulated diminishing pieces and also for proper designs of heat-hydro-insulated diminishing pieces used for connecting pipelines of different diametres and for connecting branches with simultaneous change of one diametre of pipeline to another. Procedure for fabricating set of heat-hydro-insulated pipe diminishing pieces consists in connecting diminishing piece with different diametre branches of working pipe for each pipe sub. Hydro-insulation is fabricated separately in form of a pipe-casing of a composed structure conditionally similar by shape to working pipe subs. Diminishing pieces of working pipes are centred. There are installed wires of on-line remote control system. The said hydro-insulation is conjugated with working pipe subs. Ends of hydro-insulation are sealed with process plugs. At least two-component foamed solidificated mixture is poured as a layer of heat insulation. Further mixture is conditioned; and process plugs are removed. Set of pipe diminishing pieces is fabricated within ranges of values of diametres of working pipe branches with smaller diametres from 200 to 950, preferably, from 219 to 920 mm and selectively correlating to them in ranges of diametres of working pipe branches with bigger diametres from 250 to 1050, preferably, from 273 to 1020 mm. Thus there are created combinations of from one to ten, preferably, to five diminishing pieces with the same branch of the working pipe of smaller diametre. Also there is facilitated volume protection of working pipe with hydro-insulating material. Volume protection is calculated from ratio of specific volume of hydro-insulation to a unit of payload volume of conditional running metre of the working pipe of each branch connected in a sub at the section of change from smaller diametre - not above 0.17, and not below 0.08 at the section of bigger diametre. Also at least part of pipe diminishing pieces with ratio of diametres of the pipe-casing bigger to smaller from 1.29 are made with hydro-insulation in form of a casing of complex structure out of work-pieces of the pipe-casings of bigger and smaller diametres by means of cutting. For this purpose cylinder not-flat wedges are cut out in a near-end zone of the branch of bigger diametre. Between each two nearest cuts there is left a cylinder blade. Side facets of adjacent blades are joined, mainly, by welding, and the branch of smaller diametre is connected, mainly, by welding. Each diminishing piece made according to this procedure consists of pipe sub and of hydro-insulation in form of the pipe-casing of complex structure conditionally identical to shape of the diminishing piece with diametre exceeding relative diametres of the said working pipe diminishing piece by thickness required and sufficient to the protective layer of heat insulation arranged underneath; also the layer is formed out of two-component foamed solidificated mixture of calculated density in the middle of the layer not less, than 60 kg/m3. Each diminishing piece is equipped with wires of the on-line remote control system.

EFFECT: facilitating versatility, process simplicity and efficiency of production of set of heat-hydro-insulated pipe diminishing pieces, design of which ensures reduced heat losses and increased reliability of pipeline operation in whole.

24 cl, 16 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed body comprises load bearing all-wound cocoon-type envelopment, second cocoon envelopment and flat cables of onboard cable circuit arranged in cross section at distanced defined by relationship protected by this invention. Space between load bearing envelopment and second cocoon envelopment that adjoins the cable is filled with elastic rubber interlayer with thickness varying over cross section. Interlayer convex outer surface fairs smoothly with load bearing and cable outer surfaces.

EFFECT: higher reliability and strength due to ruling out local bending strains in load bearing envelopment and second cocoon envelopment.

5 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed housing comprises casing made from composite material with its inside coated by heat-insulation rubber-like material, and shield representing a solid coat made from electrically conducting composition. The latter consists of polymer binder, organic solvent and ultra-dispersed electrically conducting powder with stable conductivity, for example aluminium powder.

EFFECT: adequate protection against SHF radiation and unauthorised change of engine operating parametres.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: solid-fuel rocket engine housing made from composite material consists of a pressure all-wound cocoon-type shell, the second cocoon shell and flat cables of the onboard cable system. Middle part of cables is arranged in the space between cocoons, and end cable parts from the space between cocoons to connectors and the connectors themselves - outside at bottoms of pressure shell; at that, connectors are fixed on bottoms. Lengths of end cable parts are bigger than lengths of meridional arches under them on the bottoms, and differences between lengths of end cable parts and lengths of meridional arches corresponding to them under them comply with the ratios protected with this invention.

EFFECT: improving operating reliability of wound cables in solid-fuel rocket engine housing made from composite material owing to eliminating tension of metal cable wires.

5 dwg

FIELD: aviation.

SUBSTANCE: charge for solid rocket fuel consists of a body, tightly clamped with the fuel charge and a protective, strengthening layer fulfilling the functions of a heat-shield and strengthening layer. The fuel charge is prepared from high energy fuel with a high level of plasticisation with nitro ester. In contrast to the fuel the protective-strengthening layer is made from a polymerous base which is characterised by its limited turgescence in nitro ester. Between the protective-strengthening layer and fuel charge is an intermediary layer with a technologically safe and compatible with the fuel plasticising agent, which does not have any nitro ester. The quantity of plasticising agent in the intermediary layer is limited from above by the conditions of adhesive, strength properties of the system, the protective-strengthening layer, intermediary layer, fuel at the level and above the strength properties and beneath from the conditions of discontinuity of rigid and deformation properties in the section attached to the body of the fuel charge to the level required of the resource to enable the operation of the fuel charge.

EFFECT: invention enables high quality and reliability of charges from high energy, mixed, solid fuels during long, guarantee periods of operation.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: body of solid propellant rocket engine comprises force solid-wound shell of low extension of "cocoon" type and cylindrical shell with joint units. Force shell is connected with cylindrical shell with the help of tapes. Medium part of tapes is fixed by zonal spiral layer on force shell, and ends of tapes from front and back bottoms are inverted relative to borders of zonal spiral layer in directions of back and front joint units accordingly and are fixed on cylindrical shell. All parts of tape are installed at the angle to longitudinal axis of body defined from ratio defended by the present invention.

EFFECT: increased reliability of rocket engine body design of low extension due to provision of high strength of force and cylindrical body shells fixation.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to rocket systems and can be used in developing composite-material casings of solid-propellant rocket engines. Forming the solid-propellant rocket engine bottom heat-protection coating proceeds as follows. First extruded rubber material tape is wound on the mandrel end face circular ledge to make a reel so that the tape ends come in contact with the mandrel, thus forming the heat-protection coating profile. The latter produced, the casing with bottom is formed by winding their elements up, which is followed by polymerisation of a binder in final structure. In compliance with this invention, the heat-protection coating is formed by winding two doubled tapes, one of them being made from the 1.2 kg/dm3-density erosion-proof rubber material while the other one represents the 0.9 kg/dm3-density heat-resistance rubber material.

EFFECT: reduced weight of heat-protection coating thanks to lower optimum mean-integral density.

2 dwg

FIELD: physics.

SUBSTANCE: device for generating charge from mixed solid fuel comprises a case with elastic baffles with a circular groove, and covers with a ledge, which enters the circular groove of the elastic baffles. To reduce tension in the butt end of the elastic baffles in the area where they are fastened to the case, the case flanges are put into a circular cavity. The preferred inner diameter of the ledge of the cover is equal to 1.0001 - 1.002 times the outer diameter of the free part of the elastic baffles.

EFFECT: reduced tension arising at the edges of the "case-elastic baffle" and "elastic baffle-fuel" contact surfaces, during the manufacturing process and use of solid fuel charges strongly attached to the case and prevention of their exfoliation.

4 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to production of composite materials enclosures and can be used in solid-propellant rocket engine body designs. The solid-propellant rocket engine body from composite materials comprises a load-bearing cocoon-like enclosure made in continuous winding up, the second cocoon wound-up enclosure and flat cables of the onboard circuitry wound in inter-cocoon space. The aforesaid onboard circuitry cables are spaced apart over the enclosure cross section by distances calculated from the ratios protected by this invention. The space between the cables is filled by elastic rubber layers arranged over the entire length of the cylindrical part, the said layers feature a variable width equal to the inter-cable distance at appropriate radius of the given layer location.

EFFECT: higher strength and reliability of solid-propellant rocket engine body provided by uniform distribution of strains in body composite material layers in operation.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to rocket-propelled vehicles, particularly, to solid-propellant rocket engines. The solid-propellant rocket engine comprises a combustion chamber, a heat insulated nozzle bottom and a solid-propellant charge partially cladded in over the outer surface. A heat-insulating screen is arranged on the nozzle bottom at the point the bottom abuts on the combustion chamber, opposite the charge uncladded part, to form a stagnant zone. The aforesaid screen represents a separate part or is made integral with the nozzle bottom. The invention notably reduces the combustion chamber wall and joint assembly.

EFFECT: higher reliability of solid-propellant rocket engine and total momentum of thrust.

2 dwg

FIELD: physics.

SUBSTANCE: method of mix solid propellant charge fastening to rocket engine case consists in preparation of heat-resistant coating, namely drying and degreasing, pouring of propellant lot to the case and hardening. To provide reliable fastening the heat-resistant coating is radiated with ultraviolet radiation with power density 1...6 kW/m. Propellant is hardened at temperature 40...70°C within 5...17 days.

EFFECT: improved technical characteristics of rocket engine.

2 dwg, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention can be particularly used in the cable industry when making electrical cable shielding used in explosive environments, in electrical engineering when making working sheath of earthing electrodes in general-purpose protective earthing systems, protection from static electricity and electrochemical protection from corrosion in the ground, fresh and sea water etc. The rubber mixture contains the following in pts. wt: synthetic ethylenepropylene diene rubber 90-100, technical sulphur 0.3-0.5, paraffin-naphthalene oil 10-15, bis-tertbutylperoxyisopropyl benzene 5.0-6.5, zinc oxide 5-8, electroconductive technical carbon 80-100, carbon-fibre material made from hydrocellulose fibre 15-25. The electrical current conductor comprises at least one conductor which has a shielding or working sheath made from the said rubber mixture.

EFFECT: improved operational characteristics of the electroconductive rubber mixture and electrical current conductors made from the said mixture.

4 cl, 2 tbl, 3 ex

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