Authors

Abstract

Taking the lubrication system of rotary tillage engine as the research object, this paper makes a three-dimensional simulation study on the oil flow characteristics in the lubricating oil passage. The oil supply of the oil pump shall be greater than the circulating oil required by the lubrication system to ensure the lubrication of the rotary cultivator. Lubrication system is an important part to ensure the reliability and durability of rotary cultivator. The key component to achieve its performance is the oil pump. The geometric model of lubricating oil flow field in rotary tiller lubrication system is established by using FLUENT software. The results show that the pressure drop in the lubricating oil passage of the main bearing is the largest under the same working conditions. In the oil passage of the cylinder head, the pressure drop of the front main oil passage is the largest and the oil discharge is the largest. Add 1.6mm oil pump rotor on the basis of the thickness of the original oil pump rotor, the oil flow at the connecting rod nozzle reaches the flow index of the original rotary cultivator, and there is no cylinder pulling phenomenon of the rotary cultivator.

Abstract in Chinese

本文以旋耕发动机润滑系统为研究对象，对润滑油道中的油流特性进行了三维仿真研究。油泵的供油量应大于润滑系统所需的循环油量，以保证旋耕机的润滑。润滑系统是保证旋耕机可靠性和耐久性的重要组成部分。实现其性能的关键部件是油泵。利用FLUENT软件建立了旋耕机润滑系统润滑油流场的几何模型。结果表明，在相同工况下，主轴承润滑油道中的压降最大。在缸盖的油道中，前主油道的压降最大，排油量也最大。在原机油泵转子厚度的基础上增加1.6mm油泵转子，连杆喷嘴处的油流量达到原旋耕机的流量指标，旋耕机不存在拉缸现象。