## 2019, v.47;No.561(03) 20-25+78

[打印本页] [关闭]

### 偏心距和偏心角对双吸泵径向力影响的数值分析Numerical Analysis on Effects of Double-Suction Pump Radial Force under Different Eccentricities and Angles

#### 朱荣生,李扬,王秀礼,王海彬Zhu Rongsheng,Li Yang,Wang Xiuli,Wang Haibin

In order to study the radial force of double-suction pumps,the numerical simulation of the double-suction pump and the eccentric double-suction pump was carried out using the RNG k-εturbulence model,respectively.Through simulation,the characteristics of the prototype double-suction pump and the external characteristics,central section as well as the characteristics of radial force acting on the impeller of the double-suction pump under different eccentricity and eccentric angle were obtained,respectively,and the radial force characteristics of the impeller were analyzed by comparison with each other.The results show that:Under the design conditions,the head fluctuation range of the four eccentricities and four eccentric angles was 0%～0.5%,the efficiency reduction range was 0.08%～1.18%,under the small flow conditions and the design conditions,the greater the eccentricity,the more obvious the radial force change,the closer to the design conditions,and the smaller the radial force acting on the impeller.In particular,0.8Q_d ω=180°,F_d=2>F_d=6>F_d=8,the radial force has a large range of fluctuation at ω=180°,d=4 mm.Radial force was more ideal for the following several points:0.8Q_d,ω=0°,1.0Q_d,ω=270°,1.2Q_d,ω=0°andω=270°.By comparing the experimental results of the prototype pump and eccentric pump under design conditions,it is shown that the numerical prediction method of radial force and the 3D models have higher reliability and have certain degree of confidence for analysis of radial force.

double-suction pump;radial force;eccentric distance;eccentric angle;numerical analysis

Abstract:

Keywords:

Zhu Rongsheng,Li Yang,Wang Xiuli,Wang Haibin