WANG Chu-nan1,2，LI He-ping1*，ZHOU Hong-bin1
(1. Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: In order to adapt the extreme work environment for the experimental system of hydrothermal fluid and solid interaction at high-temperature (600 ℃) and high-pressure (100 MPa) and to ensure safe and effective of the valve, taking the HTHP cut-off valve as a researching subject, we have designed and established 3D finite element model using the SolidWorks, and analyzed the temperature and stress distributions of this valve in actual working state using the Ansys software. 4 kinds of materials were selected for comparative analyzing the influences of the thermal conductivity coefficient, thermal expansion coefficient, and elasticity modulus on the temperature and stress distributions of those materials. The sealing structure and performance of valves at operation condition have been discussed. The results show that valve made with the selected nickel-based alloy material can maintain the enough strength at high temperature to satisfy the demand of experimental device working in the ultrahigh temperature and ultrahigh pressure environment. In a certain range, the temperature and stress of the valve are decreased along with the decrease of thermal conductivity coefficient and thermal expansion coefficient but the increase of elasticity modulus.
Keywords: the high-pressure and high-temperature valve; finite element; temperature field; stress field
ACTA MINERALOGICA SINICA Vol. 39, No.2, 2019, page 226-230
