Open AccessDynamic and static sealing performance of elastic check valve spool
Author(s) -
Cao Chao,
Zhao Jiyun,
Li Gulin,
Jin Xin,
Cao Zijian
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8979
Subject(s) - materials science , ball valve , mechanical engineering , compression (physics) , check valve , deformation (meteorology) , workbench , globe valve , composite material , structural engineering , engineering , visualization
The non‐metallic valve spool has the advantages of safety, stability, and biocompatibility. In order to expand the application of non‐metallic elastic valve spool in medical water jet, a check valve spool structure with double‐protrusion structure of polyurethane is designed to replace the metal valve spool and the spring thus achieves control of the fluid. Based on the non‐linear mechanical response of elastic materials, ANSYS Workbench was used to calculate the stress and deformation under the different friction coefficient and pre‐compression. The results show that the static sealing effect of the valve spool is best when the pre‐compression is 0.1 mm and the friction coefficient between the spool and the valve sleeve is 0.2. Then, based on bidirectional fluid–solid coupling analysis through Fluent, the flow field changes during the interaction between fluid and elastic material and the key bearing position of the valve spool are clarified. The results shows that size, processing quality, and material properties of the inner ring protrusion will determine the dynamic sealing performance of elastic valve spool.