使用 HNBR 和 EPDM 橡胶的板式热交换器的结构分析和密封能力

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Mateus de Sousa Zanzi, Gabriel Benedet Dutra, Giovani Silveira Magalhães Martins, Guilherme Mariz de Oliveira Barra, Jorge Luiz Goes Oliveira, Kleber Vieira Paiva
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引用次数: 0

摘要

橡胶是大多数工业领域都关注的工程聚合物。在带垫片的板式热交换器(GPHE)中,这些元件包括垫片,负责在高压缩、高温和高压条件下密封系统。因此,有必要了解工作条件如何影响 GPHE 的结构行为和密封性能,以及橡胶材料和特性。这项工作旨在借助密封性能实验和应变仪测量实际设备和 GPHE 组件原型中关键板材位置,确定 GPHE 的完整性和机械特性。对氢化丁腈橡胶(HNBR)和乙丙橡胶(EPDM)垫圈材料进行了评估。根据压缩强度实验,系统刚度范围约为 0.3 至 7.0 kN/mm,受板块数量和压缩水平的综合影响。压缩强度、压缩级别和橡胶材料对密封性能的综合影响是通过至少由六个垫片组成的原型获得的,其条件显示了稳定的压缩强度行为。在实际规模热交换器的临界区域,使用 EPDM 和 HNBR 垫圈在拧紧过程中测得的 von Mises 应力水平分别为 316 兆帕和 133 兆帕。根据水压试验推测,硬度和刚度较高的材料(三元乙丙橡胶)可能会产生较高的运行压力负荷。为了根据系统的几何形状、压缩程度和垫片材料确定密封能力,开发了经验相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Structural analysis and sealing capacity of gasketed plate heat exchangers with HNBR and EPDM rubbers

Structural analysis and sealing capacity of gasketed plate heat exchangers with HNBR and EPDM rubbers

Rubber is an engineering polymer of interest in most industrial sectors. In gasketed plate heat exchangers (GPHEs), these elements comprise gaskets that are responsible for sealing the system under high levels of compression, temperature and pressure. Therefore, it is a necessity to understand how operating conditions affect GPHE structural behavior and sealing performance, regarding rubber materials and features. This work aims at determining GPHE integrity and mechanical characteristics with the aid of sealing performance experiments and strain gauge measurements at critical plate locations in a real equipment and in prototypes consisting of GPHE components. Hydrogenated nitrile butadiene rubber (HNBR) and ethylene-propylene-diene rubber (EPDM) gasket materials were evaluated. Based on compression strength experiments, the system stiffness ranged from approximately 0.3 to 7.0 kN/mm regarding the combined effects of the number of plates and the compression level. The combined effects of compressive strength, compression levels and rubber material on sealing performance were obtained with prototypes comprising at least six gaskets, whose conditions presented stable compressive strength behavior. In critical region on the real-scale heat exchanger, the measured von Mises stress level was 316 MPa and 133 MPa using EPDM and HNBR gaskets during tightening, respectively. It is conjectured that higher operation pressure loads can occur with the harder and stiffer material (EPDM), as showed by hydrostatic tests. Empirical correlations were developed in order to relate sealing capacity based on the system geometry, compression level and gasket material.

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来源期刊
CiteScore
3.60
自引率
13.60%
发文量
536
审稿时长
4.8 months
期刊介绍: The Journal of the Brazilian Society of Mechanical Sciences and Engineering publishes manuscripts on research, development and design related to science and technology in Mechanical Engineering. It is an interdisciplinary journal with interfaces to other branches of Engineering, as well as with Physics and Applied Mathematics. The Journal accepts manuscripts in four different formats: Full Length Articles, Review Articles, Book Reviews and Letters to the Editor. Interfaces with other branches of engineering, along with physics, applied mathematics and more Presents manuscripts on research, development and design related to science and technology in mechanical engineering.
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