Large piston-reciprocating low-speed engine

Abstract

The invention discloses a high-power piston-reciprocating low-speed engine for large ships. The piston diameter and the average speed of an existing large high-power piston-reciprocating low-speed engine (hereinafter referred to as a contrast engine) are kept basically unchanged, the rated rotating speed of crankshafts (1,3) is increased to be three times that of the contrast engine, and the piston travel is 1 / 3 of that of the contrast engine, so that the rated power of the engine is identical with that of the contrast engine, and the size of the engine is only 1 / 4 of that of the contrast engine; then the ratio of the crankshaft gear reference circle diameter to the output shaft gear reference circle diameter is set as 1:3, so that the rated rotating speed output by the engine is identicalwith that output by the contrast engine; after the engine has the unchanged functions but the smaller size, a lot of expensive steel materials are saved, the technical difficulty in manufacturing andmaintenance of large working components is overcome, a lot of manufacturing and maintenance costs are saved, the gravity center of the engine is lowered, and the working performance is more excellent.

Description

technical field [0001] The invention belongs to the field of internal combustion engines, in particular to a high-power piston reciprocating low-speed engine used in large ships. Background technique [0002] The large-scale high-power piston reciprocating low-speed engine (hereinafter referred to as "comparison engine") used by large-scale ships, in order to directly drive the propeller with high power and low speed, adopts the technical solution of large cylinder diameter and super long piston stroke of the traditional concept to realize its function. requirements; such as the R1e×96c engine, which is 27.3 meters long, 13.5 meters high, and has an overall weight of 2,300 tons. Such a huge volume not only consumes a lot of expensive manufacturing materials, but also brings great challenges to manufacturing, installation and maintenance. The difficulty increases the cost of engine manufacturing and use, and also correspondingly occupies the bearing and installation space of ...

AI Technical Summary

Problems solved by technology

[0002] The large-scale high-power piston reciprocating low-speed engine (hereinafter referred to as "comparison engine") used by large-scale ships, in order to directly drive the propeller with high power and low speed, adopts the technical solution of large cylinder diameter and super long piston stroke of the traditional concept to realize its function. requirements; such as the R1e×96c engine, which is 27.3 meters long, 13.5 meters high, and has an overall weight of 2,300 tons. Such a huge volume not only consumes a lot of expensive manufacturing materials, but also brings great challenges to manufacturing, installation and maintenance. The difficulty increases the cost of engine manufacturing and use, and also takes up the bearing and installation space of the equipment accordingly

Only a very small number of countries in the world today can produce such large low-speed engines, which are far from meeting the requirements of social development

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