摘要
采用MPV-600型微机控磨粒磨损试验机考察了潜油螺杆泵定子丁腈橡胶(NBR)和氟橡胶(FPM)与转子45#钢配副在干摩擦条件下的磨损行为,并用扫描电子显微镜-X射线能量散射分析(SEM-EDXA)法对橡胶的磨痕表面形貌、元素含量进行分析。结果表明:两种橡胶在低载荷条件下的干摩擦磨损主要是以滞后摩擦为主,而较高载荷时NBR的磨损机制表现为粘着磨损;橡胶磨损的物理过程为微切削作用产生的微观分子断裂,随着载荷的增大,宏观分层剥落逐渐起主导作用;干摩擦过程中橡胶分子链发生断裂形成大分子自由基,大分子自由基异构化并发生氧化反应。
In order to study the wear mechanism of PCP stator （NBR and FPM）under dry sliding, a friction wear test was conducted by using MPV-600 micro-computer-controlling grain-abrasion testing machine, in which NBR, FPM and 45# steel pair are the testing subjects. SEM-EDXA was afterwards employed to observe the surface topography before and after the rubber wear. SEM-EDXA was used to analyze element content. The result shows that： Two kinds of rubber in low load conditions of dry friction and wear is the main hysteresis friction, and the wear mechanism of NBR in high load conditions is adhesive wear; The physical process of rubber abrasion is the microscopic fracture which by micro cutting actian With the increase of the load, the macro delamination gradually play a leading role; In the dry friction process rubber molecular chain was broken, macromolecular radicals were formed, macromolecular radicals isomerization and oxidation reactions.
出处
《机械设计与制造》
北大核心
2014年第2期163-166,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(50875178)
辽宁省教育厅科技计划(200814122)
