|
|
|
| Experiment of thrust disk as auxiliary impeller in a high-speed rescue pump |
| BAI Yuxing1,2,3, FENG Zizheng4, WU Jinguo1, KONG Fanyu3, CHEN Ruwen1* |
| 1. School of Automotive & Rail Transit, Nanjing Institute of Technology, Nanjing, Jiangsu 211167, China; 2. Shandong Xingyuan Mine Equipment Group Co., Ltd., Jining, Shandong 272300, China; 3. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 4. The Eleventh Research Institute of the Sixth Academy of CASC, Xi′an, Shaanxi 710000, China |
|
|
|
|
Abstract In order to obtain the hydraulic characteristics of thrust disk as auxiliary impeller in the mine high-speed rescue pump, a multi-function thrust disk experimental platform was built. The hydraulic and anti-cavitation performance of the thrust disk as auxiliary impeller at different speeds and temperatures were studied through the experimental method. The results show that different from the traditional centrifugal pump, the law of speed variation is not applicable to the head generated by the thrust disk as auxiliary impeller. The higher the speed is, the smaller the head coefficient is. The flow range of the thrust disk is related to its own structural characteristics. Under six different speeds, the head decreases as the flow velocity increases, and the maximum and minimum heads are 19.64 m and 2.62 m, respectively; the efficiency increases first and then decreases, the maximum unit efficiency is 6.5%; the power decreases slowly. With the increase of rotating speed, the flow range of the thrust disk as auxiliary impeller increases slightly, and the head and power values increase at the same flow point. In terms of anti-cavitation performance, the influence of temperature on the cavitation perfor-mance is different at different speeds; at different flows, while the anti-cavitation performance of the thrust disk as auxiliary impeller at small flow condition is better than that at large flow condition.
|
|
Received: 27 July 2020
|
|
|
|
|
|
|
