船用柴油机减压阀静态特性建模及仿真

研制了一种可正、反双向安装的某型船用柴油机气体减压阀，采用阀瓣大端作为压力反馈部件，输出压力在1.3~1.5 MPa内可连续可调.通过建立考虑非线性因素--摩擦力和流体流动作用力的减压阀静态特性数学模型，对影响减压阀压力特性的阀瓣大端直径、弹簧刚度以及阀座倾角进行了仿真研究.构建了减压阀性能测试装置，并进行了相关试验.仿真与试验结果表明，考虑非线性因素的仿真模型能较好地预报减压阀静态性能，所研制的减压阀能够满足使用要求.

Modeling and Simulation on Static Characteristics of Pressure Reducing Valve for Ship's Diesel Engine

A kind of gas pressure reducing valve (PRV) fitted by tow direction for a marine diesel engine was developed. The valve disc is served as a pressure feedback unit and the delivery pressure can be adjusted continuously from 1.3 MPa to 1.5 MPa. A pressure reducing valve static characteristics mathematical model was developed by analyzing the nonlinear factors--frictional and fluid dynamic forces, and the influences of several structure parameters on static behavior of the valve were also given. Equipment for testing the static character of the valve was designed and the several groups of operation condition were tested. The results of the simulation indicate that the model can forecast the static performances, and the valve can meet the needs completely.