|
|
|
| Friction factor-based analysis of influence factors of spiral-grooved seal on performance |
| LI Yibin1*, LI Jianzhong1, BAI Xiaobang2 |
| 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Chongqing Pump Industry Co. Ltd., Chongqing 400033, China |
|
|
|
|
Abstract In order to reveal the mechanism that working parameters influence the performance and internal flow of spiral-grooved seals and obtain selection ranges and interrelationships of the parameters, a friction factor was used as a dimensionless indictor for evaluating the performance of spiral-grooved seals. At first, a 3D model of a spiral-grooved seal and its structured-mesh block were built. Then, the spiral angle, relative groove width and relative groove depth were selected, and the characteristic curves of friction factor of spiral-grooved seals are predicted against axial Reynolds number by Fluent software based on the RANS equations. The internal flow field features were analyzed too. The results show that the friction factor decreases with increasing axial Reynolds number, and the decrement gets smaller and smaller. When the spiral angle is 21.05° or the width is 0.5, the friction factor reaches the maximum value and the sealing performance is the best. When the relative groove depth is 3, the sealing performance is the best. This study can provide a theoretical basis for the design of spiral-grooved seals.
|
|
Received: 22 April 2019
|
|
|
|
|
|
|
