Scholarlink

<p>As a continuation of Part&#xa0;1’s numerical simulation, this paper presents a comprehensive experimental study of an end-sealed squeeze film damper (SFD). Three overlapping buckle piston rings with opening gaps of 40&#xa0;mm, 50&#xa0;mm, and 60&#xa0;mm, with their flow conductances quantified through static leakage tests. Dynamic excitation experiments by single frequency are conducted under varying oil supply pressures (1.0, 3.0, and 4.0&#xa0;barG) to evaluate inertia and damping coefficients. Results show that both higher supply pressure and larger opening gaps increase the dynamic coefficients. These measurements show good agreement with the predictions using the numerical model developed in Part&#xa0;1, further validating the model’s applicability. A full‐sized rotor test rig incorporating an end-sealed SFD, with a total rotor mass of 640&#xa0;kg, is developed based on an aero-engine, assembling piston rings with a 60&#xa0;mm opening gap. The SFD’s ability to suppress lateral vibration as the rotor crosses the first-order critical speed is assessed under three unbalances (3022.5&#xa0;g&#xa0;mm/0&#xa0;deg, 6254&#xa0;g&#xa0;mm/190&#xa0;deg, and their combinations), and the effect of oil supply pressure on vibration amplitude is also investigated. The results confirm that the end-sealed SFD significantly dissipates rotor vibration energy, providing excellent vibration suppression, not limited to the resonance response, with a maximum amplitude reduction of 71.7%. These findings highlight the importance of co-optimizing rotor unbalance, piston ring’s opening gap, and oil supply pressure for effective SFD design.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dynamic characteristics of piston ring end-sealed squeeze film damper considering bubble dynamics: Part 2—Experiments validation

  • 期刊论文

  • 发表日期：

    2026年1月9日

查看全文
  • Yanzhong Huang,
  • Kefan Xu,
  • Guanghui Zhang,
  • Wenjie Gong,
  • Yunfan Jiang,
  • Lihui Li,
  • Tianwen Liu

摘要

As a continuation of Part 1’s numerical simulation, this paper presents a comprehensive experimental study of an end-sealed squeeze film damper (SFD). Three overlapping buckle piston rings with opening gaps of 40 mm, 50 mm, and 60 mm, with their flow conductances quantified through static leakage tests. Dynamic excitation experiments by single frequency are conducted under varying oil supply pressures (1.0, 3.0, and 4.0 barG) to evaluate inertia and damping coefficients. Results show that both higher supply pressure and larger opening gaps increase the dynamic coefficients. These measurements show good agreement with the predictions using the numerical model developed in Part 1, further validating the model’s applicability. A full‐sized rotor test rig incorporating an end-sealed SFD, with a total rotor mass of 640 kg, is developed based on an aero-engine, assembling piston rings with a 60 mm opening gap. The SFD’s ability to suppress lateral vibration as the rotor crosses the first-order critical speed is assessed under three unbalances (3022.5 g mm/0 deg, 6254 g mm/190 deg, and their combinations), and the effect of oil supply pressure on vibration amplitude is also investigated. The results confirm that the end-sealed SFD significantly dissipates rotor vibration energy, providing excellent vibration suppression, not limited to the resonance response, with a maximum amplitude reduction of 71.7%. These findings highlight the importance of co-optimizing rotor unbalance, piston ring’s opening gap, and oil supply pressure for effective SFD design.