交变工况下深海装备机械密封端面温升和磨损特性
收稿日期: 2021-12-20
修回日期: 2022-01-07
录用日期: 2022-01-14
网络出版日期: 2023-02-17
基金资助
浙江省自然科学基金项目(LY21E050009);浙江省自然科学基金项目(LGG21E050018);浙江省重大项目(LD21E050002);国家自然科学基金项目(52105217)
Temperature Rise and Wear Characteristics of Mechanical Seal Face of Deep-Sea Equipment Under Alternating Conditions
Received date: 2021-12-20
Revised date: 2022-01-07
Accepted date: 2022-01-14
Online published: 2023-02-17
为了研究深海复杂恶劣工况对深海涉水装备动力装置的影响,以深海推进器用接触式机械密封为研究对象,建立其二维轴对称有限元模型,探究了交变工况对密封端面温升的影响;在自行搭建的试验台上进行了机械密封拟实工况试验,监测了端面温升情况,测量并分析了端面形貌及磨损特性.结果表明:交变工况对密封环温度场有显著影响,且端面温升呈现明显的交变瞬态特性;交变工况试验后动环端面粗糙度显著增大,工况瞬变使得端面接触状态不稳定,端面发生磨粒磨损,出现明显的凹坑和深浅不一且密集分布的犁沟;交变转速较交变介质压力对端面温升及磨损的影响程度更大.数值模拟与试验结果趋势吻合良好,为深海推进器机械密封结构设计提供必要的理论指导及试验依据.
郑思敏, 滕黎明, 赵文静, 江锦波, 王梦娇, 彭旭东 . 交变工况下深海装备机械密封端面温升和磨损特性[J]. 上海交通大学学报, 2023 , 57(8) : 948 -962 . DOI: 10.16183/j.cnki.jsjtu.2021.528
In order to study the effects of deep-sea complex and severe working conditions on the power device of deep-sea wading equipment, taking the contacting mechanical seal for deep-sea propeller as the research object, a two-dimensional axisymmetric finite element model is established. The influence of alternating conditions on the temperature rise of seal face is explored. The pseudo-real condition test of the mechanical seal is conducted on a self-built test rig, and the temperature rise of seal face is monitored. The surface morphology and wear characteristics are measured and analyzed. The results show that the alternating conditions have a significant influence on the temperature field of the seal ring, and the temperature rise of seal face shows an obvious alternating transient characteristic. After the alternating condition test, the end face roughness of the rotating ring increases significantly. The transient working condition makes the contact state between the seal faces unstable. Abrasive wear occurs on the end face, with obvious pits and densely distributed furrows of different depths. The alternating speed has a greater influence on the temperature rise and wear of the end face than that of the alternating medium pressure. The numerical simulation results are in good agreement with the experimental results, which provides a necessary theoretical guidance and experimental basis for the structural design of the mechanical seal of the deep-sea propeller.
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