为研究液压滑阀内泄漏规律,搭建了滑阀内泄漏模拟实验台,对10,16,20 mm 3种阀芯直径的滑阀正常间隙(5μm)和过大间隙(40μm)下的泄漏规律进行了试验研究。结果表明,无论在正常间隙还是过大间隙下,滑阀内泄漏都是层流,并得到了径向间隙...为研究液压滑阀内泄漏规律,搭建了滑阀内泄漏模拟实验台,对10,16,20 mm 3种阀芯直径的滑阀正常间隙(5μm)和过大间隙(40μm)下的泄漏规律进行了试验研究。结果表明,无论在正常间隙还是过大间隙下,滑阀内泄漏都是层流,并得到了径向间隙、密封长度、压差、阀芯直径等因素对泄漏量的影响规律。此外,发现由层流公式得出的理论泄漏量与实测泄漏量总会存在一定的偏差,分析得出偏差可能是由于油液温度、阀芯偏心、倾斜和流态的变化引起的。研究结果可为滑阀内泄漏量的预测、阀的设计和使用提供有益的指导和借鉴。展开更多
The tri-propellant thermal propulsion system is one of the hottest subjects in the field of underwater vehicles recently. To improve efficiency of underwater vehicles, a method of radial clearance control of the tri-p...The tri-propellant thermal propulsion system is one of the hottest subjects in the field of underwater vehicles recently. To improve efficiency of underwater vehicles, a method of radial clearance control of the tri-proportion has been proposed. Based on analyzing the factors which influence the pressure decrease and leakage of the tri-proportion controller, a method is used for precision analysis and proportion adjustment by using the median optimizing theory. Analysis results show that accuracy of the proportion controller is dependent on all the leakage, while the leakage is decided by radial clearance and pressure; the leakage can be controlled effectively and the accuracy of the proportion can be improved with the radial clearance control method. The method of accuracy analysis and clearance control has value on the design of various hydraulic motors.展开更多
To find the influence of rotor clearance on internal mixer's capacity,3D finite element method(FEM)models were built and pressure field,viscosity field,velocity field,and temperature field were simulated.In additi...To find the influence of rotor clearance on internal mixer's capacity,3D finite element method(FEM)models were built and pressure field,viscosity field,velocity field,and temperature field were simulated.In addition,the experiment was also conducted on the X(S)M-1.7L laboratory mixer.The simulation shows that rotor clearance brings some effect on internal mixer's capacity such as the pressure,temperature,viscosity,velocity,and shear stress,etc.The experimental result indicates that rotor clearance affected the maximum power,consumption of unit energy,production capability,mixing time,and dumping temperature and so on.展开更多
文摘为研究液压滑阀内泄漏规律,搭建了滑阀内泄漏模拟实验台,对10,16,20 mm 3种阀芯直径的滑阀正常间隙(5μm)和过大间隙(40μm)下的泄漏规律进行了试验研究。结果表明,无论在正常间隙还是过大间隙下,滑阀内泄漏都是层流,并得到了径向间隙、密封长度、压差、阀芯直径等因素对泄漏量的影响规律。此外,发现由层流公式得出的理论泄漏量与实测泄漏量总会存在一定的偏差,分析得出偏差可能是由于油液温度、阀芯偏心、倾斜和流态的变化引起的。研究结果可为滑阀内泄漏量的预测、阀的设计和使用提供有益的指导和借鉴。
基金supported by CSIS Foundation of China under Grant No.07J4.1.2
文摘The tri-propellant thermal propulsion system is one of the hottest subjects in the field of underwater vehicles recently. To improve efficiency of underwater vehicles, a method of radial clearance control of the tri-proportion has been proposed. Based on analyzing the factors which influence the pressure decrease and leakage of the tri-proportion controller, a method is used for precision analysis and proportion adjustment by using the median optimizing theory. Analysis results show that accuracy of the proportion controller is dependent on all the leakage, while the leakage is decided by radial clearance and pressure; the leakage can be controlled effectively and the accuracy of the proportion can be improved with the radial clearance control method. The method of accuracy analysis and clearance control has value on the design of various hydraulic motors.
基金National Key Technological Equipment Programof China duringthe 10th Five-Year Plan Period(No.ZZ01-20-01-03-02)
文摘To find the influence of rotor clearance on internal mixer's capacity,3D finite element method(FEM)models were built and pressure field,viscosity field,velocity field,and temperature field were simulated.In addition,the experiment was also conducted on the X(S)M-1.7L laboratory mixer.The simulation shows that rotor clearance brings some effect on internal mixer's capacity such as the pressure,temperature,viscosity,velocity,and shear stress,etc.The experimental result indicates that rotor clearance affected the maximum power,consumption of unit energy,production capability,mixing time,and dumping temperature and so on.
