文档介绍：摘要
天然气汽车减压装置是天然气的汽车的一个重要部件,它的质量好坏车的性能有很大的关系,它在天然气汽车中主要起减压和稳压的作用。因此,通过利用减压装置,可以把2-20MPa的压缩天然气压力降到1-,以便与空气混合进入汽缸,G气体压力随着燃料充装和使用不断变化,要保持较稳定的空燃比控制,还要求无论瓶内压力如何变化,减压调节器也应保证进入混合器的燃气压力基本恒定,以此实现比较稳定的燃气与空气混合比控制。从而实现减压和稳压的作用。
本次毕业设计在原有减压产品的基础上,对其结构布局及形状进行了修改,并对输入发动机过程中的天然气压力的变化值进行了精确的设计,主要是对一级减压阀的缝隙减压和二级减压阀的缝隙减压,以及三级减压阀利用真空度进行减压进行计算,使其能够满足减压至预期的要求。而且对各主要受载荷的零部件进行了强度校核,使选择的材料满足强度要求。预计本次设计出来的减压装置具有结构简单,外行美观,精度高的特点,可提高同类产品的质量,可以满足广大用户的需求。
关键词:天然气汽车;减压装置;减压阀
ABSTRACT
The natural gas automobile pressor is a natural gas automobile important part, its quality quality vehicle performance has the very big relations, it is main the reduced pressure in the natural gas automobile and the constant voltage function. Therefore, through use pressor, may 1-pression natural gas pressure drop to 1- enters the mixer, in order to enters the cylinder with the air mix, because in the high-pressure G gas pressure changes, must maintain the stable air-fuel ratio control, also requests regardless of how the bottle internal pressure does change, the reduced pressure regulator also should guarantee enters the mixer basically the fuel gas pressure constant, by this realization quite stable fuel gas and air mixture ratio control. Thus realization reduced pressure and constant voltage function.
This graduation project in original reduced pressure product foundation, have carried on the revision to its structural configuration and the shape, and to input in the engine process the natural gas pressure change value to carry on the precise design, mainly is to the level pressure relief valve slit reduced pressure and two level of pressure relief valve slit reduced pressure, as well as three levels of pressure relief valves carry on the reduced pressure using the vacuum degree to carry on putation, enables its to satisfy the reduced pressure to the anticipated request. Moreover to each mainly has been carried on the load spare part the intensity examination, causes the choice the materia