Novel piston top of gas engine

Abstract

The invention provides a novel piston top of a gas engine. The piston top comprises a cylindrical piston top body, wherein annular grooves are distributed in the side wall of the piston top body; the upper end surface of the piston top body is concave inwards to form a first cavity body, and the lower end surface of the piston top body is concave inwards to form a second cavity body; the outer edge of the second cavity body is continuously concave inwards to form a cooling cavity which consists of an inner ring bearing surface, a connecting surface, an upper bottom surface and an outer ring bearing surface which are successively connected, the inner ring bearing surface and the outer ring bearing surface are parallel to the axis of the piston top body, the connecting surface is arc-shaped, and the center of a circle of the connecting surface is positioned on one side of the inner ring bearing surface. Due to the adoption of the piston top of the gas engine disclosed by the invention, the volume of the cooling cavity is reduced, so that the cooling speed of a piston is moderate, too high or too low cooling speed is avoided, and the heat loss is small, so that the oil consumption rate is reduced; at the same time, after the volume of the cooling cavity is reduced, the oil mass of cooling oil is reduced, the consumed power of a lubricating oil pump is reduced, and the cost is reduced; the structure of the piston top is simple, the processing is facilitated, and the processing cost is reduced.

Description

technical field [0001] The invention relates to a combined piston, in particular to a novel gas engine piston top. Background technique [0002] The traditional combination piston is designed as a piston with a cooling cavity, and its top is made of steel. Due to the effective cooling method, the temperature of the ring area is low, so there is no risk of carbon deposition, and it also reduces the number of piston rings. wear and tear. Cooling means heat loss, but this loss is necessary to ensure reliable and long-lasting operation of the piston. If the piston cools too much, it will have a series of adverse effects. The structure of the existing piston top is as figure 1 As shown, the cooling cavity 104' is composed of an inner ring support surface 1041', a first slope 1042', a bottom surface 1042', a connection surface 1044', a second slope 1045' and an outer ring support surface 1046 connected in sequence, and the structure is complex. The production is difficult, whi...

AI Technical Summary

Problems solved by technology

Cooling means heat loss, but this loss is necessary to ensure reliable and long-lasting operation of the piston

If the piston cools too much, it will have a series of adverse effects

The structure of the existing piston crown is as figure 1 As shown, the cooling cavity 104' is composed of an inner ring support surface 1041', a first slope 1042', a bottom surface 1042', a connection surface 1044', a second slope 1045' and an outer ring support surface 1046 connected in sequence, and the structure is complex. The production is difficult, which increases the production cost, and the volume of the piston cooling chamber is relatively large, the cross-sectional area of ​​the cooling chamber is 1272mm2, and the cooling speed is relatively fast, which also leads to excessive heat loss and increased fuel consumption.

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