RU2336428C1 - Ice cylinder block - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: device incorporates separate cylinders, adjacent cylinders at dead top center are jointed together by high-strength high-thermal conductivity metal plates to withdraw heat from cylinders out into the atmosphere. Said plates are arranged along cylinder block lengthwise axis, their thickness being equal to distance between inner surfaces of adjacent ribs and their width being equal to rib length on side facing adjacent cylinder rib. Plate length equals distance between adjacent cylinders less rib extension above outer smooth cylinder surface.

EFFECT: higher vibration resistance of cylinders and reduced wear of cylinder-and-piston group.

2 cl, 2 dwg

Description

The invention relates to engine building, in particular to reciprocating internal combustion engines (ICE), and can be used in multi-cylinder internal combustion engines with air cooling, as well as reciprocating compressors.

A known cylinder block of an internal combustion engine containing separately located cylinders having ends and a finned outer surface [1].

The disadvantage of this unit is its low vibration resistance and, as a consequence, increased wear of the working surfaces of the cylinders.

A known cylinder block of an internal combustion engine containing separately located cylinders having ends [2].

The disadvantage of this unit is its low vibration resistance and, as a consequence, increased wear of the working surfaces of the cylinders.

The closest in technical essence to the claimed invention is a cylinder block of an internal combustion engine [3] containing separately located cylinders having ends, and at least one of the ends of the cylinders is made with a slope obliquely to the longitudinal axis of the cylinder.

The disadvantage of the block is the low vibration resistance of the ICE cylinders and the difficulty of making inclined chamfers and grooves, as well as the ends of the cylinders, the cross section of which does not lie in one plane. In addition, the specified technical solution only reduces the level of acoustic vibrations in the cylinder, but does not completely eliminate them.

The claimed invention is aimed at eliminating the noted drawbacks and from its application the following result was obtained: increasing the vibration resistance of the internal combustion engine cylinders and reducing the wear of cylinder-piston parts.

The specified technical result is achieved through the use of a cylinder block of an internal combustion engine containing separately located cylinders having ends and a finned outer surface, while adjacent cylinders in the zone of top dead center are connected by high-strength metal plates located along the longitudinal axis of the cylinder block, and the number of plates per one is less than the number of cylinders in the block, and the thickness of the plates corresponds to the distance between the inner surfaces of adjacent ribs, the width is Line ribs on the side facing to the edge adjacent the barrel.

New distinctive features of the cylinder block of the internal combustion engine are that separately located cylinders in the zone of top dead center are rigidly interconnected by high-strength metal plates having certain geometric dimensions.

- средняя возмущающая сила; α - угол наклона поршня при его перекладке; h - зазор между поршневым кольцом и поршневой канавкой.Figure 1 shows the arrangement of cylinders of a single-row internal combustion engine (all pistons are shown at top dead center) with rigid connections between adjacent cylinders by connecting their plates in the zone of top dead center: A is the outer fin surface of the cylinder; B - the inner working surface of the cylinder. Figure 2 shows a diagram of disturbing forces when shifting the piston at top dead center:

- average disturbing force; α is the angle of inclination of the piston when it is shifted; h - the gap between the piston ring and the piston groove.

The cylinder block of the internal combustion engine contains separately located cylinders 1, 2, 3 (FIG. 1) having ends 4 and finned outer surface A, while adjacent cylinders 1 and 2, 2 and 3 in the zone of top dead center are connected by high-strength metal plates 5 located along the longitudinal axis 6 of the cylinder block, the number of plates being one less than the number of cylinders in the block, and the thickness of the plates corresponds to the distance between the inner surfaces of adjacent ribs, the width to the length of the rib from the side facing the rib bottom cylinder. In the intercostal space of adjacent cylinders, the plates 5 are rigidly fixed by soldering, gluing or welding with the base metal of the cylinders.

The use of metal plates 5 on the cylinder block is manifested during the operation of the internal combustion engine at the moment of piston shifting near the top dead center.

, которая, действуя через поршневое кольцо на внутреннюю рабочую поверхность Б цилиндра, вызывает его отклонение от вертикальной плоскости, перпендикулярной оси блока цилиндров. При появлении зазора h и исчезновении силы

цилиндр занимает исходное положение. Периодическое появление силы

вызывает колебания (вибрации) цилиндра, что увеличивает износ деталей цилиндропоршневой группы. Так как зоной формирования возмущающей силы

(динамической нагрузки) в момент перекладки поршня является зона верхней мертвой точки, то установка «жестких» пластин между соседними цилиндрами ограничивает их смещение от вертикальной оси и относительно друг друга, что приводит к повышению вибростойкости как отдельных цилиндров, так и блока в целом.At the moment of shifting the piston in the cylinder, accompanied by its rotation (relative to the axis of the piston pin) through the angle α (Fig. 2), the clearance h between the piston rings and the piston grooves is selected and the appearance of a disturbing force

which, acting through a piston ring on the inner working surface B of the cylinder, causes it to deviate from a vertical plane perpendicular to the axis of the cylinder block. When the gap h appears and the force disappears

the cylinder is in its original position. Periodic appearance of power

causes oscillations (vibrations) of the cylinder, which increases the wear of the parts of the cylinder-piston group. Since the zone of formation of the disturbing force

(dynamic load) at the moment of piston shifting is the top dead center zone, the installation of “hard” plates between adjacent cylinders limits their displacement from the vertical axis and relative to each other, which leads to increased vibration resistance of both individual cylinders and the block as a whole.

The geometric dimensions, location and material of the connecting plates are selected so as to ensure maximum structural rigidity in the plane of the piston in the cylinder.

INFORMATION SOURCES

1. Arkhangelsk B.E. Tractor T-40. / B.E. Arkhangelsky, A.S. Balaev, K.N. Vinogradov and others .-- M .: Kolos, 1964. - S.11-17.

2. Patent No. 19812831 Germany, IPC F02F 7/00. Cylinder block of an internal combustion engine; publ. 1999.

3. Patent No. 2230920 Russia, IPC F02B 77/13, F02F 1/18. The cylinder block of an internal combustion engine. / B.P. Gritsenko, V.V. Bespalov .; publ. 2002.

Claims (2)

1. The cylinder block of the internal combustion engine, containing separately arranged cylinders having ends and a ribbed outer surface, characterized in that the adjacent cylinders in the zone of top dead center are connected by high-strength metal plates located along the longitudinal axis of the cylinder block, the number of plates being one less the number of cylinders in the block. 2. The cylinder block according to claim 1, characterized in that the thickness of the plates corresponds to the distance between the inner surfaces of adjacent ribs, and the width of the plates corresponds to the length of the rib from the side facing the edge of the adjacent cylinder.

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