论文部分内容阅读
(一)前言活塞是柴油机的重要零件,它承受着交变的热负荷和机械负荷,而冷却和润滑条件都很差。活塞顶部直接受到高温燃气的周期性作用,工作条件极为苛刻。本文所介绍的碗形燃烧室活塞即柴油机的燃烧室呈椭球形,位于活塞顶部,其冷却是靠柴油机机体上的喷嘴,将机油喷入活塞裙部进油孔,然后进入活塞顶冷却腔,从而振荡冷却活塞。
(A) Foreword The piston is an important diesel engine parts, it is subjected to alternating thermal and mechanical load, and cooling and lubrication conditions are poor. The top of the piston is directly affected by the cyclical effect of hot gas and the working conditions are extremely harsh. The bowl-shaped combustion chamber piston described in this paper is an ellipsoidal shape of the combustion chamber of the diesel engine and is located at the top of the piston. The cooling of the bowl-shaped combustion chamber piston depends on the nozzle on the diesel engine body, injecting the oil into the piston skirt into the oil hole and then into the piston top cooling cavity, Thereby oscillatingly cooling the piston.