永磁弹簧单向阀的设计与特性研究

Design and Characteristics of Permanent Magnetic Spring Check Valve

针对目前单向阀中因机械螺旋弹簧存在疲劳、断裂等导致其性能降低,压力和流量损失增大等问题,利用磁性材料"同性相斥、异性相吸"的原理,提出斥力、引力两种永磁弹簧单向阀结构。利用ANSYS的Fluent模块对其进行流场仿真分析。在实验室条件下进行相同开启压力流量和压差-流量特性试验。结果表明:新型永磁弹簧单向阀结构合理,斥力永磁弹簧单向阀开启压力最小,反应最灵敏;引力永磁弹簧单向阀压力损失最小。两种永磁弹簧单向阀性能比机械弹簧单向阀优越。

In order to solve the problems such as the performance decrease,the pressure loss and flow loss increases caused by the fatigue and fracture of the mechanical coil spring,we put forward two kinds of permanent magnetic spring check valve structures by using the principle of“homosexual repulsion and heterosexual absorption”of the magnetic material,and the Fluent module of ANSYS is used to simulate the flow field.The same opening pressure flow rate and the differential pressure flow characteristic tests are carried out under laboratory conditions.The results show that the proposed permanent magnetic spring check valve has a reasonable structure,and the opening pressure of the repulsive permanent magnetic spring check valve is the smallest and the reaction is the most sensitive;the pressure loss of the gravitational permanent magnetic spring check valve is the smallest,and the performance of two permanent magnetic spring check valves is better than that of the mechanical spring check valve.