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chan pin xi lie bao dao zhi mi feng jian mi feng jian xiao zuo yong da zhong guo gong cheng yuan yuan shi
Author(s): WANG Yuming
Pages: 77
Year: 2009
Issue:
6
Journal: Hydraulics Pneumatics & Seals
Abstract: 顾名思义,"密封"就是防止或限制"泄漏"的技术或者零部件.这里的"泄漏"主要指具有一定的压力、温度和其他物理、化学特性(如易燃、易爆、有毒、腐蚀、放射性等等)的流体的泄漏.泄漏的动力有三种:一是压力差,二是浓度差(扩散),三是表面张力(渗漏).泄漏不仅会造成物料损失、能源浪费,而且还会污染环境,威胁设备和人身安全.为了达到密封之目的,密封副之间一般都是小间隙或者接触.
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