SU998798A1

SU998798A1 - Flange connection gasket

Info

Publication number: SU998798A1
Application number: SU802997736A
Authority: SU
Inventors: Юрий Александрович Соловьев; Виталий Васильевич Болотов; Юрий Семенович Пятилетов
Original assignee: Институт Ядерной Физики Ан Казсср
Priority date: 1980-10-29
Filing date: 1980-10-29
Publication date: 1983-02-23

Description

(54) ПРОКЛАДКА ФЛАНЦЕВОГО СОЕДИНЕНИЯ(54) FLANGED CONNECTION GASKET

Изобретение относитс к уплотнительной технике и может быть использовано дл уплотнени фланцевых разъемов аппаратов и труезопроводов.The invention relates to a sealing technique and can be used to seal the flange connectors of apparatus and pipe lines.

Известна прокладка, выполненна в виде толстостенного металлического кольца полого сечени , внутренн полость которого соединена с высоким давлением через радиальный канал iT.A known gasket is made in the form of a thick-walled metal ring of hollow section, the internal cavity of which is connected to high pressure through the radial channel iT.

Недостаток этого устройства состоит в том, что величина деформации предварительного зат га будет небольшой и возникновение разности линейных размеров при температурной качке приведет к по влению течи.The disadvantage of this device is that the magnitude of the deformation of the preliminary thrust will be small and the occurrence of a difference in linear dimensions during temperature buildup will lead to leakage.

Наноолее близкой по техническбй сущности и достигаемому результату вл етс прокладка фланцевого разъема , состо ща из полого металлического тонкостенного кольца, наружна поверхность которого покрыта-м гким металлом, а внутренн полость соединена с высоким давлением радиальными отверсти ми 2.Nano closer in technical essence and the achieved result is a flange connector gasket consisting of a hollow metal thin-walled ring, the outer surface of which is covered with a soft metal, and the inner cavity is connected to a high pressure by radial holes 2.

Однако такие прокладки не примен ют в основном из-за трудности обработки канавки под прокладку по большому диаметру около 4-х метров с точностью 0,025 мм. Така точность обработки св зана с тем, что давлениеHowever, such gaskets are not used mainly because of the difficulty of machining the gasket groove over a large diameter of about 4 meters with an accuracy of 0.025 mm. This processing accuracy is due to the fact that the pressure

на уплотнительной поверхности относительно невелико.on the sealing surface is relatively small.

Если применить тонкостенную трубку , коэффициент усилени будет не больше К 1,3-1,5, т.е. самоуплотн ющее воздействие невелико. В идеальном случае желательно, чтобы величина предварительного з ат га была довольно значительна (около 4% высоты If a thin-walled tube is used, the gain will not be greater than K 1.3-1.5, i.e. self-sealing effect is small. In the ideal case, it is desirable that the magnitude of the preliminary salary is quite significant (about 4% of

10 прокладки), а коэффициент усилени не менее К 5-6. Дл обычных кольцевых прокладок, выполненных из трубки с круглым сечением, такое требование невыполнимо.10 pads), and the gain is at least K 5-6. For conventional annular gaskets made from a tube with a circular cross section, such a requirement is impracticable.

1515

Целью изобретени вл етс увеличение надежности и удешевление фланцевого соединени .The aim of the invention is to increase the reliability and reduce the cost of the flange connection.

Указанна цель достигаетс тем, что прокладка в поперечном сечении This goal is achieved by the fact that the gasket in cross section

20 выполнена в виде эллипса или овала, близкого к эллипсу, причем больша ось эллипса перпендикул рна к опорной поверхности фланцев, а радиальные отверсти выполнены со стороны низко25 го -давлени .20 is made in the form of an ellipse or oval, close to an ellipse, with the major axis of the ellipse perpendicular to the bearing surface of the flanges, and the radial holes are made on the side of low pressure.

На чертеже изображена предлагаема прокладка.The drawing shows the proposed gasket.

Прокладка 1 установлена в кольцевой канавке 2 между фланцами 3 и 4, The gasket 1 is installed in the annular groove 2 between the flanges 3 and 4,

Claims

30, the gap 5 between which is approximately 4% of the height of the gasket 1. Inside the cavity of the gasket 1 is connected to the atmosphere by radial holes. In the cross section, the gasket is made in the form of an ellipse with semi-axes a and b. In the working position, the flanges 3 and 4 tighten up until they touch, completely selecting the gap 5. In this case, the spacer is elastically deformed, so that the major axis of the ellipse decreases by the size of the gap 5, and the minor axis increases correspondingly by the condition of the ellipse . Inside the ellipse of the curb, the pressure remains equal to the atmosphere, due to the radial holes b. The pressure inside the apparatus, acting on the gasket as an arch, tends to compress it along the minor axis of the ellipse, which creates a force acting on (flanges, i.e., gasket self-sealing. The pressure on the sealing surface can be determined from the following formula: where Рц is the pressure on the sealing surface, Р (, р is the pressure of the medium J is the pressure created by the spring effect of the gasket; K is the gain factor; t is the gauge of the ring surface of the seal; a is the greater semi-axis, the ellipse is in a compressed state the ellipse axis in compressed As it can be seen from the formula, there is some freedom of choice. The pressure on the sealing surface XR can be increased both by increasing the absolute dimensions of the ellipse and by increasing the ratio of semi-axes. Thus, it is possible to obtain the optimal dimensions of the ellipse so that deformation at tightening, as well as a high coefficient of gain at a given stiffness, which determines the spring effect P проклад of the gasket when tightening the flange connector. The stiffness of the gasket and the gain increase with the ratio of axles 2, i.e. with increasing exb centrisite of the ellipse. This allows high pressures on the sealing surface Rc to be achieved, thereby reducing the accuracy of manufacture. The technical and economic efficiency of the invention is to reduce the cost of the flange regioner by reducing the accuracy of manufacture and increasing its reliability. Claims The laying of a flange connection consisting of a hollow metal thin-walled ring with radial holes, the outer surface of which is covered with a soft metal, is characterized in that, in order to increase the reliability and cheapening of the Flange connection, the gasket is made in cross section an ellipse or an oval close to the ellipse, with the major axis of the ellipse perpendicular to the bearing surface of the flanges, and the radial holes are made on the low pressure side. Sources of information taken into account in the examination 1. Compaction. Ed. Zhitomirsky V.K.M., Mechanical Engineering, 1964, p. 291, tab. 1, fig. 2

2. Makarov G.V. Sealing devices. M.-L., Mechanical Engineering, 1965, p. 170-171 (prototype).