Durability analysis of rotary direct drive electro-hydraulic pressure servo valve based on failure physics principle

• DOI: 10.1371/journal.pone.0316711
• Publication Date: 2025-02-21T18:27:08Z
• Authors: Jianrui Zhang; Xing Wei; Ni Li; Xiaonan Pan; Yitong Sun
• Keywords: Electrohydraulic servo valve; Check valve

The rotary direct drive electro-hydraulic servo valve (RDDPV) is extensively employed in hydraulic systems across aerospace, automotive, and various industrial sectors owing to its remarkable precision rapid response characteristics. investigation of the durability life such devices, constituting intricate amalgamations mechanical, electrical, components, has perennially posed a formidable challenge. To address this challenge, our study proposes methodology grounded failure mechanisms systematically quantify RDDPV. In conjunction with finite element analysis, delves into fatigue transmission mechanism wear slide valve—two components recognized as vulnerabilities within Initially, novel approach proposed that integrates probability theory fuzzy traditional Miner theory, enhancing accuracy predictions for mechanisms. Subsequently, meticulous examination ensued, wherein we quantitatively characterized radial between core sleeve using degree line wear. Ultimately, employing index calculations, total operational ascertained at about 435,000 hours, thereby aligning national standards. This research not only contributes significantly field but also holds substantial reference value precise quantification analogous pressure valves.