单螺杆泵衬套的收缩变形分析

Deformation analysis of single-screw pump bush

针对单螺杆泵衬套曲面形状的变形问题,对影响橡胶收缩率的因素、温度变化与衬套形状之间的关系和衬套模芯曲线形状修正方法等问题进行了研究。采用温度场与结构应变场的耦合分析的方法,利用有限元分析软件ANSYS模拟了衬套出模冷却时的温度场,分析了螺杆泵衬套形状随温度的变化特点。研究结果表明,硫化温度与工作温度差异越大,衬套的变形越明显,并呈现出头部变形小、腰部变形较大的特点,通过适当缩小螺杆泵模芯腰部尺寸可以减小温度变化对其最终形状的影响,提高衬套的形状精度。

Aiming at the problem of the deformation of the shape of pump bush, the relationship between temperature and bush shape, the way to refine the shape of bush and the factors that influence the shrinkage of bush were investigated. The temperature field of the bush was simulated through Finite Element Analysis by combining the temperature field and the structure field. The results show that the more differences between the vulcanization temperature and working temperature, the greater deformation of the bushing, the deformation of head is small, while the deformation of waist is large. By reducing the size of waist could ease the influence of temperature change, thus the size accuracy of the pump bush is refined.