|
| Design of Bybass Valve with Equal Percentage Flow Regulation for Two-Stage Turbocharger System of Diesel Engine |
| DOI：10.13949/j.cnki.nrjgc.2021.02.012 |
| Key Words:two-stage turbocharger system special shaped by-pass valve multi-cross section mixing valve characteristics of flow field regulation characteristic |
| Author Name | Affiliation | | LENG Ling, CHENG Jianghua, WANG Zhenbiao, LIU Sheng, SHI Lei, DENG Kangyao | 1. Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiao TongUniversity, Shanghai 200240, China
2. China North Engine Research Institute, Tianjin 300400, China |
|
| Hits: 2537 |
| Download times: 1206 |
| Abstract:Aiming at the requirement of wide range and high precision regulation characteristics of marine diesel engine two-stage turbocharging by-pass valve, the optimization design research of offset special-shaped by-pass valve disc was carried out to realize the equal percentage flow regulation characteristics, which solves the problem of low flow adjustment accuracy of universal quick-open by-pass valve. And the bypass valve with equal percentage flow characteristics can achieve consistent control parameters within the full opening range. According to the different special-shaped valve structures, the flow regulation characteristics were analyzed, and the design method of multi-cross section mixing valve was put forward. Through the flow characteristic test of various valves, the effective adjustment range of multi-cross section mixing valve was verified. The research shows that the flow characteristics of the optimized multi-cross section mixing valve are the closest to the equal percentage flow characteristics. The maximum effective relative opening is 0.73, which is 2.6 times that of the general plat by-pass valve. The gain change rate is reduced and the regulation accuracy is greatly improved. It shows that the multi-cross section mixing valve can significantly improve the regulation characteristics of the boost pressure, and can effectively and smoothly control the boost pressure of the adjustable two-stage turbocharging system. |
| View Full Text View/Add Comment Download reader |
|
|
|