溝付シールの安定性向上と漏れ量低減 : 第1報, 平行溝付シールの全溝内にスワールブレーカを設けた場合

概要

論文の詳細を見る
This paper proposes a new type of annular seal named Swirl Braked Grooved Seal (SBGS). The SBGS has circumferential or helical grooves in which several swirl breakers are set up to prevent the circumferential flow. It is expected that these swirl breakers reduce the tangential velocity and the tangential force in the seal. Rotordynamic coefficients and leakage test results are presented for 5 types of the SBGS in the first report. The tested SBGS have 10 circumferential grooves, and several swirl breakers are in all the grooves. The SBGS can reduce cross-coupled stiffness and increase direct damping and direct stiffness compared with the conventional circumferentially grooved seal. The leakage didn't vary according to fins very much. This paper also discusses the difference between the whirl frequency ratio and the effective damping coefficients which are often used for evaluating of seal stability.
一般社団法人日本機械学会の論文
2001-09-25