转子叶片数对翅板摆动泵流场的影响  

Effect of blade numbers on flow field of wings swing pumps

作　　者：张朦淅 邹旻[1] 王子祥 周发戚 ZHANG Meng-xi;ZOU Min;WANG Zi-xiang;ZHOU Fa-qi(School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213000,China)

机构地区：[1]常州大学机械与轨道交通学院,江苏常州213000

出　　处：《机电工程》2022年第5期620-626,667,共8页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51075046);江苏省高等学校自然科学研究项目(19KJB530003)。

摘　　要：针对转子叶片数影响着翅板摆动泵流场及工作性能的问题,为研究不同叶片数下,翅板摆动泵内部流场的变化情况,利用动网格和UDF技术,对叶片数分别为2、3、4、5和6的翅板摆动泵的二维流场进行了研究,对其在运动过程中的工作性能进行了分析。首先,根据翅板摆动泵的工作原理及其转子的运动方式,分析了转子叶片数与泵排量、容积效率的关系;然后,利用Mesh软件进行了网格划分,并结合RNG k-ε湍流模型,编写了UDF文件,对不同叶片数下的翅板摆动泵进行了数值模拟;最后,根据仿真得到的压力及速度分布云图,对比分析了不同叶片数下翅板摆动泵的工作性能。研究结果表明:当转子叶片数为2时,摆动泵吸油腔和排油腔的压力分布都很均匀,流速变化较平缓;随着转子叶片数的增加,吸油腔出现不同程度的低压区域及局部流速增大的现象,而且当叶片数为4、5、6时,在排油腔的弧形壁面与直线壁面间的夹角区域会出现流速降低的现象;经过综合对比可知,当叶片数为2时,翅板摆动泵的工作性能最好。Aiming at the problem that the number of rotor blades affects the flow field and working performance of wings swing pump,in order to study the changes of internal flow field of wings swing pump with different number of blades,the two-dimensional flow field of wings swing pump with 2,3,4,5 and 6 blades respectively was studied by using dynamic grid and UDF technology,and its working performance was analyzed.Firstly,according to the working principle of the wings swing pump and the movement mode of the rotor,the relationship between the number of rotor blades and the displacement and volumetric efficiency was analyzed.Secondly,mesh software was used for meshing.Combining with RNG k-εturbulence model and UDF,the numerical simulations of the pumps with different numbers of blades were carried out.Finally,according to the pressure and velocity distribution cloud diagrams obtained by simulation,the working performances of the wings swing pumps with different numbers of blades were compared and analyzed.The results show that when the number of blades is two,the pressure distribution in the oil suction chamber and the oil discharge chamber is both uniform and the flow rate changes smoothly.With the increase of the number of blades,the oil suction chamber has different degrees of low pressure areas and local increase in flow velocity.Even when the numbers of blades are four,five and six,the flow velocity decreases in the area of the angle between the arc-shaped wall and the straight wall in the oil discharge chamber.Therefore,the comprehensive comparison shows that when the number of blades is two,the performance of the wings swing pump is better.

关 键 词：转子泵 转子叶片数 内部流场 泵排量 容积效率 工作性能 

分 类 号：TH326[机械工程—机械制造及自动化]