隔膜泵碟形橡胶隔膜的优化设计

Optimal Design of Dish-Shaped Rubber Diaphragm of Diaphragm Pump

通过建立碟形橡胶隔膜通用参数化控制模型,实现隔膜设计的优化。采用流固耦合分析法对不同控制参数下的隔膜泵液力端进行建模、分析,并充分考虑液力系统对隔膜运动及变形的影响,得到符合工程实际的隔膜变形量及应力。通过对某款隔膜泵建模分析,得出倾角以50°~60°、隔膜厚度以6 mm左右为宜且遵循宜厚不宜薄原则的碟形隔膜设计参考理论。

The general parametric control model of dish-shaped rubber diaphragm was established in order to optimize the diaphragm design. The hydraulic ends of diaphragm pump under different control parameters were modeled and analyzed by liquid-structure interaction analysis method,and the effect of hydraulic system on the movement and deformation of diaphragm was fully considered. Then the deformation and stress of diaphragm which were in accord with the actual conditions of engineering practice were obtained. Through modeling and analysis for a certain diaphragm pump,the design principles were developed as follows：preferred dipping angle was 50°~60°,preferred diaphragm thickness was about 6 mm,and thick diaphragm design was favorable over thin design.