SU1312219A1 - Gas joint seal - Google Patents

Abstract

The invention relates to the field of engine-building and makes it possible to increase the reliability of the sealing of the joint by reducing the thermal and mechanical stress of the protective ring. The protective ring 1 contains a thickened part 2 and shoulders 3, which are directed towards the gasket 4. There are one or several longitudinal inserts 5 projecting above the surface of the ends of the protective ring. In order to improve the performance of the joint sealing by reducing the temperature of the thickened part of the protective ring, an insert made of heat-conducting material is used. To prevent the protective ring from slipping into the cylinder cavity when the engine is assembled, insert is inserted; it is made of materials with improved (frictional properties. 2 hp, f-crystals, 4 Il. SL O O FagL 2 3

Description

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The invention relates to mechanical engineering, mainly to seals between surfaces that are stationary relative to each other, and can be used, for example, in internal combustion engines (ICE) for sealing a gas joint.

The purpose of the invention is to increase the reliability of the sealing of the joint by reducing the thermal and mechanical stress of the protective ring.

Fig. 1 shows the structure of the joint seal; in fig. 2 - the location of the protective ring in the gasket; in fig. 3 - protective ring with three inserts, cross section; in fig. And - the same, with two inserts.

The protective ring 1 contains a thickened part 2 and shoulders 3., which are directed toward the gasket A. There are one or several longitudinal inserts 5 protruding above the surface of the ends of the protective ring 1.

To improve the performance of the joint seal by reducing the temperature of the thickened part of the protective ring, an insert 5 made of heat-conducting material (for example, steel or copper wire, tube, tape or rod of complex cross section) is used. The longitudinal insert 5 (Fig. 1) is positioned in the groove of the thickened part of the ring 1 so that the surface of the insert 5, which is in contact with the material of the thickened part, several times exceeds the surface in contact with the metal surfaces of the engine. This provides a stable, balanced heat flow from the ring through the insert to the outside parts. Inserts 5 can have a complex cross section (e.g., a Casinny oval, an epicycloid, etc.), which creates a significant increase in the contact surface of the insert with the ring when mounted. - deformations of the latter on the engine.

This is of great importance, since the dissimilar compounds usually possess the lowest thermal conductivity; materials, in a particular case, metal: the surfaces of the parts being coated and the end surfaces of the nonmetallic protective ring, whose thermal conductivity is very small. In the proposed design of protection 92.

The new ring and the insert metal are in contact over a developed surface, which sharply reduces the thermal conductivity threshold between the ring and the engine component to be cooled. In addition, the insert provides the thermal output in the shortest way from the inside of the working volume of the protective ring in a manner similar to the process of cooling the pistons through compression rings in the internal combustion engine by contacting the protruding part of the insert 5 with the metal surface of the component to be cooled (cylinder head or liner).

To prevent the protective ring from slipping into the cylinder cavity during engine assembly, the insert is made of materials with improved frictional properties (for example, steel, asbestos, rubber, etc.). In the case of the use of a metal insert together with a rubber (Fig. 3) protective ring, the necessary temperature conditions in operation and immobility during installation are provided,

The protruding part of the insert, in contact with the surface of the metal parts to be cooled, is kept from friction by movement by friction, while simultaneously keeping the ring from moving.

The inserts can be pre-shaped to ensure consistent installation of the ring in the corresponding bores of the gasket or other parts of the internal combustion engine

Such a seal design ensures its sufficient operability and increases the reliability of the gasket due to its effective isolation from the effects of working gases and low radial pressures on the walls of the holes,.

Claims (3)

1. Sealing the gas joint between the cylinder head and the cylinder liner without an engine collar of an internal combustion engine, comprising a head gasket with cylinder holes and a protective ring made of fire-resistant plastic material with a thickened part and side collar directed toward the gasket, spaced in the cylinder gasket hole, different if it is, that., in order to increase the reliability of By reducing thermal and mechanical stress, the protective ring is provided with at least one insert located equidistantly at the end face relative to the inner surface with the possibility of protruding above the end surface of the ring. 2, Seal according to claim 1, characterized in that the insert is made of a heat-conducting material. 3. Seal on PP. 1 and 2, characterized in that the insert is made of a material with enhanced frictional properties. 2 Editor O. Bugir Compiled by V. Lobanov Tehred M. Khodanich Proofreader S. Shekmar Order 1946/30 Circulation 504. Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Figm