CIESC Journal ›› 2023, Vol. 74 ›› Issue (4): 1660-1679.DOI: 10.11949/0438-1157.20221545

• Surface and interface engineering • Previous Articles     Next Articles

Comparative study on leakage and film-forming characteristics of oil-gas seal with three-typical groove in a wide speed range

Wenxuan XU1(), Jinbo JIANG1(), Xin PENG1, Rixiu MEN2, Chang LIU2, Xudong PENG1   

  1. 1.College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310012, Zhejiang, China
    2.Science and Technology on Diesel Engine Turbocharging Laboratory,China North Engine Research Institute,Tianjin 300400,China
  • Received:2022-11-28 Revised:2023-01-04 Online:2023-06-02 Published:2023-04-05
  • Contact: Jinbo JIANG


许文烜1(), 江锦波1(), 彭新1, 门日秀2, 刘畅2, 彭旭东1   

  1. 1.浙江工业大学机械工程学院,浙江 杭州 310012
    2.中国北方发动机研究所柴油机增压技术重点实验室,天津 300400
  • 通讯作者: 江锦波
  • 作者简介:许文烜(1997—),男,硕士研究生,
  • 基金资助:


How to achieve both low oil leakage at low-speed condition and low gas consumption, high stability at high speed condition is the key problem in the design of the oil-gas seal used in vehicle turbocharger. Taking the oil-gas seals with pump-out spiral groove, splayed compound groove and Rayleigh compound groove as the research object, the two-phase Reynolds model derived from the continuity of oil and gas phase is used to solve the flow field distribution of the three different types oil-gas seals numerically, and the gas film thickness and medium leakage of the oil-gas seals under different working conditions are measured based on a special-designed test platform. The leakage characteristics and film-forming characteristics of the three different oil-gas seals in a wide speed range are compared, and the influence of key structural parameters, including groove depth, spiral angle and pump-out groove length ratio, on the leakage and film-forming characteristics of the splayed compound groove oil-gas seal is emphatically analyzed. The results show that the pump-out spiral groove can be selected as the optimal scheme when oil-gas seal operates under low-speed condition because of its minimum oil leakage, and the splayed compound groove seal can be regarded as the optimal one in the high speed condition because of its significantly lower gas consumption and larger gas film stiffness. But it depends on the reasonable design of its groove depth, helix angle and pump out groove length ratio. Under certain working condition and structural parameters, the compound groove face seal is expected to form an obvious oil-gas interface on the seal face in the radial direction, so as to achieve near zero leakage for both oil and gas.

Key words: oil-gas seal, gas-liquid flow, optimal design, turbocharger, experimental validation



关键词: 油气密封, 气液两相流, 优化设计, 涡轮增压器, 实验验证

CLC Number: