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access icon openaccess Dynamic and static sealing performance of elastic check valve spool

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 28/09/2018, Accepted 12/10/2018, Published 19/10/2018

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.

Inspec keywords: mechanical engineering computing; seals (stoppers); stress analysis; elasticity; computational fluid dynamics; valves; deformation; friction

Other keywords: nonmetallic valve spool; static sealing performance; elastic material; elastic check valve spool; stress; size 0.1 mm; ANSYS Workbench; bidirectional fluid–solid coupling analysis; metal valve spool; nonmetallic elastic valve spool; dynamic sealing performance; medical water jet; check valve spool structure; deformation; pre-compression; static sealing effect; friction coefficient; Fluent; valve sleeve; nonlinear mechanical response

Subjects: General fluid dynamics theory, simulation and other computational methods; Mechanical engineering applications of IT; Tribology (mechanical engineering); Applied fluid mechanics; Mechanical components; Elasticity (mechanical engineering); Civil and mechanical engineering computing; Fluid mechanics and aerodynamics (mechanical engineering)

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