SU1219834A1 - Sealing of slide valve - Google Patents

Description

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The invention relates to mechanical engineering, in particular to engine construction, and can be used as a spool-type gas distribution valveless valve mechanism of internal combustion engines.

The purpose of the invention is to increase the reliability of compaction.

The drawing shows the seal of the valve, section.

The seal of the spool contains an insert 1 with an opening 2 for the passage of gas, which is installed in the bore 3 of the cover 4 of the cylinder 5 and is flush with the walls 6 of the gas exchange channel 7, having a surface 9 adjacent to the spool 8 of the same radius of curvature and a spring 10 attached to it 1 has a porous coating of cermet or welded (brass, bronze) balls and an annular groove 12 around the hole 2, the liner 1 is full step, with a large step

13 is located on the side of the spool 8, and the smaller step 14 - with a gap. 15 in the bore 3 of the cover 4 of the cylinder 5 and has compression rings 16, the spring 10 is installed between the stage 13 and the cover 4 and is isolated from the latter by an additionally installed gasket 17, and the annular groove 12 by drainage channels 18 is connected to the top of the gap 15. The insert 1 is fixed from twist lock 19.

Seal works as follows.

Insert 1 in its lesser degree

14 is established in the bore 3 of the upper part of the gas exchange channel 7 in the cylinder 4 of the cylinder 5. The insert 1 1 has the ability to move the Editor O. Golovach

Compiled by D. Kiselev Tehred A.Aliyev

Order 1308/45

Circulation 500 I Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/3

Branch PPP Patent, Uzhgorod, st. Project, 4

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98342

c along the axis under the action of the disc spring 10 and possible beatings of the spool 8, as well as in the process of compensating for wear of the sliding surfaces one relative to the other surfaces. The spring 10 constantly presses the concave surface 9 of the insert 1 to the cylindrical part of the spool 8 and thereby seals the combustion chamber.

The leakage of gases through the gap between the lower step 14 of the liner 1 and the bore 3 is eliminated by compression elastic rings 16, wearing the lower step 14 of the liner 1. The spring is protected from the heat flow coming from the engine combustion chamber through the cylinder 4 of the cylinder 5 using thermal insulation strip 17 which prevents its self-release and loss of elasticity during the operation of the seal.

The reliability of lubricating the pipe surfaces of the insert 1 and spool 8 is ensured by the presence on the concave surface 9 of a porous layer 11, in the capillaries of which the lubricant constantly enters it from the cylindrical part of the spool 8. The flow of engine oil into the gas exchange channel 7, and thereby into the combustion chamber is prevented by an annular groove 12 around the opening 2. The oil is drained from the groove 12 through drainage channels 18, the output of which is to prevent the combustion chamber from being depressurized during the opening of the opening 2 and the grooves 12 of the spool 8 are located in the gap 15 between the lower stage 14 of the insert 1 and the bore 3. This achieves a good lubrication of the sealing rings 16.

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Proofreader V. But ha

Claims (1)

GASKET SEAL, mainly for gas distribution of an internal combustion engine, comprising a liner with a gas passage hole, mounted in a bore of the cylinder cover flush with the walls of the gas exchange channel, having a surface of the same radius of curvature adjoining the golden wire and spring-pressed against it, characterized in that , in order to increase the reliability of the seal, the surface of the liner adjacent to the spool has a porous coating of cermet or brass or bronze balls welded together and a groove around the gas exchange channel, the liner is stepped, with a large step located on the side of the spool, and a smaller one with a gap in the bore of the cylinder cover and has compression rings, the spring is installed between the larger diameter step and the cover and is isolated from the last additional installed 15 gasket, and the annular groove - drainage channels made in the liner, and connected to the upper part of the specified gap.