RU2432647C1 - Antenna dome - Google Patents

Antenna dome Download PDF

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RU2432647C1
RU2432647C1 RU2010130278/07A RU2010130278A RU2432647C1 RU 2432647 C1 RU2432647 C1 RU 2432647C1 RU 2010130278/07 A RU2010130278/07 A RU 2010130278/07A RU 2010130278 A RU2010130278 A RU 2010130278A RU 2432647 C1 RU2432647 C1 RU 2432647C1
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antenna
shell
porous
thickness
coating
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RU2010130278/07A
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Russian (ru)
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Евгений Иванович Суздальцев (RU)
Евгений Иванович Суздальцев
Виктор Георгиевич Кулиш (RU)
Виктор Георгиевич Кулиш
Дмитрий Викторович Харитонов (RU)
Дмитрий Викторович Харитонов
Ирина Александровна Булимова (RU)
Ирина Александровна Булимова
Владимир Викторович Антонов (RU)
Владимир Викторович Антонов
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Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология"
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Abstract

FIELD: physics. ^ SUBSTANCE: antenna dome has a radiotransparent coating made from porous ceramic, on the inner side of which there is a layer of ceramic with a polymer inside the pores, and on the outer surface there is a moisture-resistant coating deposited on a porous coating which is first blocked with acetone, wherein the on the surface of the coating there are annular trapezoidal cavities with depth of 0.003-0.010 times the operating wavelength of the antenna. On the acetone-blocked surface there are also annular belts made from material whose permittivity is greater than that of the coating material, wherein thickness of the annular belts ranges from 5 to 300 mcm. ^ EFFECT: improved radio characteristics of the antenna dome. ^ 1 tbl

Description

Изобретение относится к области авиационной и ракетной техники и преимущественно может быть использовано при изготовлении антенных обтекателей скоростных ракет из пористой керамики.The invention relates to the field of aviation and rocket technology and can mainly be used in the manufacture of antenna fairings for high-speed rockets from porous ceramics.

Известен головной антенный обтекатель ракеты (Патент РФ №2209494, H01Q 1/42 от 27.07.03), у которого радиопрозрачная оболочка состоит из радиопрозрачного внутреннего силового элемента из пористой кварцевой керамики с введенным в поры полимером и внешнего теплозащитного элемента из пористой кварцевой керамики, причем толщина радиопрозрачного внутреннего силового элемента составляет 0,05-0,1 от общей толщины стенки радиопрозрачной оболочки или равномерно увеличивается от носка к основанию до величины, соответствующей 0,1-0,9 от общей толщины стенки, а толщина внешнего теплозащитного элемента меняется в обратной зависимости с сохранением общей электрической толщины стенки радиопрозрачной оболочки, при этом на наружную поверхность внешнего теплозащитного элемента нанесено влагозащитное покрытие. Преимуществом такой конструкции является то, что в ней предусмотрено упрочнение и герметизация пористой керамической оболочки, что повысило несущую способность обтекателя из кварцевой керамики, обеспечило его влагоустойчивость.Known head antenna rocket fairing (RF Patent No. 2209494, H01Q 1/42 dated 07/27/03), in which the radiolucent sheath consists of a radiolucent internal power element made of porous quartz ceramic with a polymer introduced into the pores and an external heat-protective element made of porous quartz ceramic, the thickness of the radiotransparent internal power element is 0.05-0.1 of the total wall thickness of the radiotransparent shell or evenly increases from the toe to the base to a value corresponding to 0.1-0.9 of the total wall thickness, and Thickness of the external heat shield element varies inversely with preservation of the overall electrical radio transparent shell wall thickness, wherein the outer surface of the outer heat shield element applied moisture barrier. The advantage of this design is that it provides for hardening and sealing of the porous ceramic shell, which increased the carrying capacity of the fairing made of quartz ceramics and ensured its moisture resistance.

К недостаткам известной конструкции относится недостаточный уровень радиотехнических характеристик обтекателя, вызванный в первую очередь тем, что введенный в поры полимер увеличивает диэлектрическую проницаемость кварцевой керамики примерно на 10%, а толщина пропитанного слоя значительна и переменна, что существенно усложняет радиодоводку обтекателей после пропитки. Ко второй причине следует отнести отсутствие ограничений по наружному влагозащитному покрытию в части его толщины, что также приводит к снижению радиотехнических характеристик (РТХ) обтекателя.The disadvantages of the known design include an insufficient level of radio technical characteristics of the fairing, caused primarily by the fact that the polymer introduced into the pores increases the dielectric constant of quartz ceramics by about 10%, and the thickness of the impregnated layer is significant and variable, which significantly complicates the radio wiring of fairings after impregnation. The second reason is the absence of restrictions on the external moisture-proof coating in terms of its thickness, which also leads to a decrease in the radio technical characteristics (PTX) of the fairing.

Наиболее близким техническим решением является антенный обтекатель ракеты (Патент РФ №2267837, H01Q 1/42 от 10.01.06), содержащий радиопрозрачную оболочку из пористой кварцевой керамики, на внутренней стороне которой содержится слой керамики с введенным в поры полимером толщиной 0,02-0,05 общей толщины стенки оболочки, а на наружной поверхности влагозащитное покрытие толщиной 50-80 мкм, нанесенное на предварительно блокированную ацетоном пористую оболочку, при этом на поверхности оболочки выполнены кольцевые трапециевидные проточки глубиной 0,003-0,010 рабочей длины волны антенны. Такое профилирование стенки оболочки трапециевидными проточками глубиной 0,003-0,010 длины волны излучения антенны позволяет существенно улучшить радиотехнические характеристики (РТХ) обтекателя.The closest technical solution is the rocket antenna fairing (RF Patent No. 2267837, H01Q 1/42 dated 01/10/06), containing a radiolucent sheath of porous quartz ceramic, on the inside of which there is a ceramic layer with a polymer introduced into the pores with a thickness of 0.02-0 , 05 of the total wall thickness of the shell, and on the outer surface a moisture-proof coating with a thickness of 50-80 μm deposited on a porous shell previously blocked with acetone, while circular trapezoidal grooves with a depth of 0.003-0.010 ra are made on the surface of the shell booming wavelength of the antenna. Such profiling of the shell wall with trapezoidal grooves with a depth of 0.003-0.010 of the radiation wavelength of the antenna can significantly improve the radio technical characteristics (PTX) of the fairing.

К недостаткам известной конструкции следует отнести то, что выполнение профилирования стенки оболочки осуществляется в зависимости от диэлектрической проницаемости материала на стадии механической обработки керамической оболочки. При дальнейшей операции пропитки внутренней поверхности происходит изменение диэлектрической проницаемости пропитанного материала (как в представленном аналоге) и как следствие к ухудшению РТХ оболочки. Кроме того, выполнение проточек глубиной 0,003-0,010 длины волны стенки требует большой точности. Нередки случаи, когда в процессе доводки обтекателя кольцевыми трапециевидными проточками изделие выходило в брак из-за превышения заданных размеров проточек.The disadvantages of the known design include the fact that the profiling of the shell wall is carried out depending on the dielectric constant of the material at the stage of machining of the ceramic shell. During the further operation of impregnation of the inner surface, the dielectric constant of the impregnated material changes (as in the presented analogue) and, as a result, the PTX of the shell worsens. In addition, the implementation of grooves with a depth of 0.003-0.010 wavelength of the wall requires great accuracy. There are frequent cases when, during the refinement of the fairing with circular trapezoidal grooves, the product was defective due to exceeding the specified dimensions of the grooves.

Задачей настоящего изобретения является улучшение радиотехнических характеристик антенного обтекателя из пористой керамики.The objective of the present invention is to improve the radio characteristics of the antenna fairing made of porous ceramics.

Поставленная задача достигается тем, что предложен антенный обтекатель, содержащий радиопрозрачную оболочку из пористой керамики, на внутренней стороне которой содержится слой керамики с введенным в поры полимером, а на наружной поверхности влагозащитное покрытие, нанесенное на предварительно блокированную ацетоном пористую оболочку, при этом на поверхности оболочки выполнены кольцевые трапециевидные проточки глубиной 0,003-0,010 рабочей длины волны антенны, отличающийся тем, что сначала на блокированную ацетоном поверхность наносят кольцевые пояса из материала с диэлектрической проницаемостью большей, чем у материала оболочки, а затем влагозащитное покрытие, при этом толщина кольцевых поясов составляет от 5 до 300 мкм.This object is achieved by the fact that the proposed antenna cowl containing a radiolucent shell of porous ceramics, on the inside of which contains a layer of ceramic with a polymer introduced into the pores, and on the outer surface a moisture-proof coating deposited on a porous shell previously blocked with acetone, while on the shell surface circular trapezoidal grooves with a depth of 0.003-0.010 of the working wavelength of the antenna are made, characterized in that first, they apply to the surface blocked by acetone face belts made of a material with a dielectric constant greater than that of the sheath material, and then a moisture-proof coating, while the thickness of the ring belts is from 5 to 300 microns.

Авторы установили, что выполнение под влагозащитным покрытием кольцевых поясов из материалов с большей, чем у материала обтекателя диэлектрической проницаемостью, позволяет существенно повысить уровень РТХ обтекателя. Это происходит за счет локального регулирования электрической толщины стенки обтекателя и как следствие компенсации его угловых ошибок. При этом за счет увеличения электрической толщины стенки обтекателя, становится возможным использование обтекателей, вышедших в брак на операции механической обработки трапециевидных проточек.The authors found that the execution under the moisture-proof coating of annular belts made of materials with a higher dielectric constant than that of the fairing material, can significantly increase the PTX level of the fairing. This occurs due to local regulation of the electric thickness of the fairing wall and, as a result, compensation of its angular errors. At the same time, due to the increase in the electric thickness of the wall of the fairing, it becomes possible to use fairings that are married to the machining operations of trapezoidal grooves.

Установлено, что толщина каждого кольцевого пояса является величиной переменной и подбирается для каждого конкретного обтекателя с учетом обеспечения его радиотехнических характеристик во всем диапазоне рабочих частот.It was established that the thickness of each annular belt is a variable and is selected for each specific fairing, taking into account the provision of its radio-technical characteristics in the entire range of operating frequencies.

Кроме того, экспериментально было установлено, что минимальная толщина кольцевых поясов составляет 5 мкм, так как нанесение более тонких слоев не приводит к заметному изменению электрической толщины стенки, а максимальная толщина не должна превышать 300 мкм, так как дальнейшее увеличение может привести к нарушению целостности влагозащитного покрытия при эксплуатации обтекателя.In addition, it was experimentally established that the minimum thickness of the annular belts is 5 μm, since the application of thinner layers does not lead to a noticeable change in the electric wall thickness, and the maximum thickness should not exceed 300 μm, since a further increase can lead to a violation of the integrity of the moisture barrier cover during operation of the fairing.

Технология изготовления антенных обтекателей по предложенному техническому решению включает следующие операции:The manufacturing technology of antenna fairings according to the proposed technical solution includes the following operations:

- изготовление керамической пористой заготовки методами керамического производства;- the manufacture of ceramic porous preforms by methods of ceramic production;

- механическая обработка заготовки алмазным инструментом до заданной толщины стенки и профиля изделия с радиодоводкой обтекателя кольцевыми трапециевидными проточками по заданной программе в зависимости от величины диэлектрической проницаемости материала в оболочке;- machining the workpiece with a diamond tool to a predetermined wall thickness and product profile with radio feed of the radome with trapezoidal grooves according to a given program depending on the dielectric constant of the material in the shell;

- герметизация оболочки путем пропитки по внутренней поверхности оболочки ацетоновым раствором кремнийорганического полимера ТМФТ или МФСС с последующей полимеризацией при температуре;- sealing the shell by impregnation on the inner surface of the shell with an acetone solution of an organosilicon polymer TMFT or MFSS followed by polymerization at a temperature;

- нанесение на наружную поверхность методом пульверизации или при помощи тампона ацетона для блокировки капиллярно-активных пор керамики;- application to the outer surface by spraying or using a tampon of acetone to block capillary-active pores of ceramics;

- нанесение на наружную поверхность кольцевых поясов из материала с большей диэлектрической проницаемостью (например, эпоксидной грунтовки ЭП0104) в зависимости от радиотехнических характеристик обтекателя во всем диапазоне рабочих частот;- drawing on the outer surface of the ring belts of a material with a higher dielectric constant (for example, EP0104 epoxy primer), depending on the radio technical characteristics of the fairing over the entire range of operating frequencies;

- нанесение на наружную поверхность влагозащитного покрытия;- application of a moisture protective coating to the outer surface;

- склейка оболочки со шпангоутом при помощи герметика.- gluing the shell with the frame using sealant.

Выполнение антенного обтекателя по предложенному решению позволяет существенно улучшить радиотехнические характеристики антенного обтекателя из пористой керамики, что подтверждается данными таблицы, в которой представлены сравнительные РТХ изделий из кварцевой керамики, выполненных по прототипу и по предложенному техническому решению. Как видно из представленных данных, применение предложенного технического решения позволяет снизить на 25-30% величину вносимой изделием ошибки и на 10-20% крутизну ошибки, как на верхних, так и на нижних частотах, что особенно важно для систем наведения ракет, оснащенных бортовой аппаратурной компенсацией.The implementation of the antenna cone according to the proposed solution can significantly improve the radio technical characteristics of the antenna cone made of porous ceramics, which is confirmed by the data in the table, which shows the comparative PTX of quartz ceramic products made according to the prototype and according to the proposed technical solution. As can be seen from the data presented, the application of the proposed technical solution allows to reduce the error introduced by the product by 25-30% and the error steepness by 10-20% both at the upper and lower frequencies, which is especially important for missile guidance systems equipped with onboard hardware compensation.

№ изделияItem No. Режим измеренияMeasurement mode Верхняя частота, поляризация ЕHigh frequency, polarization E Нижняя частота, поляризация ЕLow frequency polarization E По прототипуAccording to the prototype По предложенному техническому решениюAccording to the proposed technical solution По прототипуAccording to the prototype По предложенному техническому решениюAccording to the proposed technical solution Вносимая изделием ошибка (минуты)Product error (minutes) Крутизна ошибкиSteepness of error Вносимая изделием ошибка (минуты)Product error (minutes) Крутизна ошибкиSteepness of error Вносимая изделием ошибка (минуты)Product error (minutes) Крутизна ошибкиSteepness of error Вносимая изделием ошибка (минуты)Product error (minutes) Крутизна ошибкиSteepness of error 1one -- -- -- -- 19,019.0 0,0710,071 14,014.0 0,0660,066 22 -- -- -- -- 16,016,0 0,0660,066 14,014.0 0,0590.059 33 14,014.0 0,0600,060 10,010.0 0,0540,054 -- -- -- -- 4four 13,013.0 0,0730,073 10,010.0 0,0550,055 -- -- -- --

Таким образом, предложенное техническое решение просто в исполнении и позволяет существенно улучшить РТХ обтекателей из пористой керамики.Thus, the proposed technical solution is simple in execution and can significantly improve the PTX of porous ceramic fairings.

Источники информацииInformation sources

1. Патент РФ №2209494, H01Q 1/42 от 27.07.03.1. RF patent No. 2209494, H01Q 1/42 from 07.27.03.

2. Патент РФ №2267837, H01Q 1/42 от 10.01.06.2. RF patent No. 2267837, H01Q 1/42 dated 10.01.06.

Claims (1)

Антенный обтекатель, содержащий радиопрозрачную оболочку из пористой керамики, на внутренней стороне которой содержится слой керамики с введенным в поры полимером, а на наружной поверхности влагозащитное покрытие, нанесенное на предварительно блокированную ацетоном пористую оболочку, при этом на поверхности оболочки выполнены кольцевые трапециевидные проточки глубиной 0,003-0,010 рабочей длины волны антенны, отличающийся тем, что сначала на блокированную ацетоном поверхность наносят кольцевые пояса из материала с диэлектрической проницаемостью большей, чем у материала оболочки, а затем влагозащитное покрытие, при этом толщина кольцевых поясов составляет от 5 до 300 мкм. An antenna cowl containing a radiolucent shell made of porous ceramic, on the inside of which there is a ceramic layer with a polymer introduced into the pores, and on the outer surface a moisture-proof coating deposited on a porous shell previously blocked with acetone, with circular trapezoidal grooves with a depth of 0.003- 0.010 working wavelengths of the antenna, characterized in that first, ring belts of a material with a dielectric pron impermeability greater than that of the shell material, and then the moisture barrier, the thickness of the annular zone is from 5 to 300 microns.
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