Open AccessNumerical research on sealing performance of high speed and high pressure centrifugal compressor seal
Author(s) -
Jun Wu,
Zhenxing Zhao,
Lu Dai,
Xingsheng Lao,
Weijian Lv
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/711/1/012049
Subject(s) - labyrinth seal , centrifugal compressor , seal (emblem) , leakage (economics) , gas compressor , mechanics , volumetric flow rate , materials science , mechanical engineering , engineering , physics , art , turbine , economics , visual arts , macroeconomics
In this paper, two seal schemes of stepped labyrinth seal and straight through-hole seal are selected for the shaft end seal of S-CO 2 centrifugal compressor with the output of 100kW. The full three-dimensional CFD numerical simulation method is adopted to analyze and compare the sealing characteristics of two S-CO 2 seals in S-CO 2 centrifugal compressor under different outlet back pressures and sealing gaps. The results show that the leakage flow rate of S-CO 2 stepped labyrinth seal and through-hole seal increases with the decrease of back pressure. The leakage flow rate of the stepped labyrinth seal and the through-hole seal reaches the corresponding critical value when the back pressure is 1.0 MPa and 3.0 MPa respectively. The critical leakage flow rate of the stepped labyrinth seal and the through-hole seal under the condition of 0.1 mm sealing gap is 0.158 kg/s and 0.128 kg/s respectively. Compared to the through-hole seal, the stepped labyrinth seal can withstand greater pressure differentials at the same sealing gap and has superior S-CO 2 sealing performance.