RU2064884C1

RU2064884C1 - Method of sealing-up bolted joints in pressurized compartments

Info

Publication number: RU2064884C1
Authority: RU
Inventors: Загир Шайхуллович Яруллин
Original assignee: Загир Шайхуллович Яруллин
Priority date: 1992-07-03
Filing date: 1992-07-03
Publication date: 1996-08-10

Abstract

FIELD: sealing-up bolted joints in pressurized compartments. SUBSTANCE: to avoid loosening in bolted joints in units of integral tanks and escape of fuel through clearances between fasteners in the vicinity of these units, members to be connected are provided with projections and sealant is applied between web of frame and panel, as well as between web of bracket and panel, but for area of projections. Sizes of projections by radius from bolt axis and over contact surface exceed radius of circle of pressure cone over the same surface. Height of projection on one of engageable part when projection is made on one part only or total height of projections when they are provided on both engageable parts is selected according to required thickness of sealant. EFFECT: higher reliability. 3 cl, 1 dwg

Description

Предложение относится к области авиации, а именно к топливным бакам-отсекам в грузовом полу. The proposal relates to the field of aviation, namely to fuel tank compartments in the cargo floor.

Известен способ герметизации болтовых соединений в герметичных отсеках, заключающийся в нанесении герметика в пространствах между поверхностями стыкуемых элементов и крепежных элементов, соединяющих стыкуемые кронштейн, панель и шпангоут, а также последующий поверхностной герметизацией [1]
Недостатками такого способа герметизации является трудоемкость постановки герметичных элементов крепления, высокая точность изготовления сопрягаемых элементов, высокая чистота герметизируемых поверхностей.A known method of sealing bolt joints in airtight compartments, which consists in applying sealant in the spaces between the surfaces of the joined elements and fasteners connecting the joined bracket, panel and frame, as well as subsequent surface sealing [1]
The disadvantages of this method of sealing is the complexity of setting sealed fasteners, high precision manufacturing of mating elements, high purity of the surfaces to be sealed.

Технической задачей является исключение расшатывания болтового соединения в узлах баков-отсеков, которые подвергают знакопеременным сосредоточенным нагрузкам, тем самым исключение, например, вытекания топлива через зазоры между деталями крепежа в районе этих узлов. The technical task is to eliminate loosening of the bolted joint in the nodes of the tank compartments, which are subjected to alternating concentrated loads, thereby eliminating, for example, fuel leakage through the gaps between the fasteners in the area of these nodes.

Поставленная техническая задача достигается тем, что в стыкуемых элементах выполнены выступы, а герметик нанесен между полкой шпангоута и панелью, а также между полкой кронштейна и панелью, кроме района выступов. The technical task is achieved by the fact that in the mating elements protrusions are made, and the sealant is applied between the frame shelf and the panel, and also between the bracket shelf and the panel, except for the area of the protrusions.

Кроме того, размеры выступов по радиусу от оси болта по поверхности соприкосновения выбирают большими радиуса окружности конуса давления по той же поверхности. In addition, the size of the protrusions along the radius from the axis of the bolt along the contact surface is chosen large by the radius of the circumference of the pressure cone on the same surface.

А высоту выступа на одной из соприкасающихся деталей при выполнении его только на одной из них или суммарную высоту выступов при выполнении их на обеих соприкасающихся деталях выбирают равной требуемой по технологии толщине слоя герметика. And the height of the protrusion on one of the contacting parts when performing it on only one of them, or the total height of the protrusions when performing them on both contacting parts is chosen equal to the thickness of the sealant layer required by the technology.

На чертеже дан общий вид узла, где представлен способ герметизации болтовых соединений в герметичных топливных баках-отсеках. Кронштейн 1 выполняют с выступами 2, аналогично полки 3 шпангоута выполняют с выступами 4. Головка болта 5 герметизируется жгутовым герметиком 6. Между полкой 3 шпангоута и панелью 7 имеются слои герметика 8, 9, а между полкой кронштейна 1 и панелью 7 предусмотрены слои герметика 10, 11. The drawing shows a General view of the site, which shows a method of sealing bolted joints in sealed fuel tanks, compartments. The bracket 1 is made with protrusions 2, similarly, the frames of the frame 3 are made with the protrusions 4. The head of the bolt 5 is sealed with a harness sealant 6. There are layers of sealant 8, 9 between the shelf 3 of the frame and the panel 7, and layers of sealant 10 are provided between the shelf of the bracket 1 and the panel 7 , eleven.

Claims

1. The method of sealing bolted joints in sealed compartments, which consists in applying sealant in the spaces between the surfaces of the joined elements and fasteners connecting the joined bracket, panel and frame, as well as in the subsequent surface sealing, characterized in that the protrusions are made in the joined elements, and sealant is applied between the frame shelf and the panel, as well as between the bracket shelf and the panel, except for the area of the protrusions.

2. The method according to claim 1, characterized in that the size of the protrusions along the radius from the axis of the bolt, on the contact surface, is chosen large by the radius of the circumference of the pressure cone on the same surface.

3. The method according to p. 1, characterized in that the height of the protrusion on one of the contacting parts when performing it on only one of them or the total height of the protrusions when performing them on both contacting parts is chosen equal to the thickness of the sealant required by the technology.