Year: 2025
Type: article
Abstract: 本文主要观察对象为煤矿反馈的6个反冲洗阀芯组件，分别从过液阀套、阀座、进液阀芯、排污阀芯等存在动密封的结构件的密封面进行重点分析，通过分析发现过液阀套密封面和阀座密封面出现的较明显的塑性变形是造成反冲洗阀串液的主要原因，这些缺陷会直接导致反冲洗阀串液；另外由于动密封主要是针对高压液，密封过程中会使得动密封面周围出现较大的速度波动和压力波动，密封面容易在气蚀和压力冲击下出现凹坑等缺陷，这些小的缺陷也会加剧反冲洗阀的串液；同时由于高压乳化液洁净度差，有大量的铁屑等附着在密封面上，影响密封面，同时压伤密封面。The primary subjects of this study are six backflush valve core assemblies reported by a coal mine. The focus is on the sealing surfaces of the structural components with dynamic seals, such as the liquid passage valve sleeve, valve seat, inlet valve core, and sludge discharge valve core. The analysis reveals that the relatively significant plastic deformation on the sealing surfaces of the liquid passage valve sleeve and valve seat is the main cause of liquid cross-contamination in the backflush valve. These defects directly lead to cross-contamination. Additionally, since the dynamic seals are mainly for high-pressure liquid, the sealing process can cause significant velocity and pressure fluctuations around the sealing surfaces. The sealing surfaces are prone to pitting and other defects due to cavitation and pressure impact, which can further exacerbate the cross-contamination in the backflush valve. Moreover, the high-pressure emulsion has poor cleanliness, with a large amount of iron filings and other debris adhering to the sealing surfaces, affecting the sealing performance and causing damage to the sealing surfaces.
Source: Mine Engineering
Author: 洪琛 马
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4410376333