硬质合金环研磨加工中的材料去除率分析
Analysis of Material Removal Rate in Lapping of the Hard Alloy Rings

作者: 王 宇 , 左云盛 , 金洙吉 :大连理工大学精密与特种加工教育部重点实验室,辽宁 大连;

关键词: 流体静压密封环预变形研磨材料去除率Hydrostatic Mechanical Seal Rings Pre-Deformation Lapping Material Removal Rate

摘要:
非接触式流体静压密封环是轴封式核主泵核心零部件。采用预变形平面研磨加工技术可以实现密封环低成本高效加工,但在变形以及加工过程的材料去除控制对最终面形精度非常关键。本文通过平面研磨实验对硬质合金环的材料去除特性开展了研究。研究发现,磨粒粒径、研磨压力及研磨盘转速对材料去除率和表面粗糙度都有显著的影响。当选用2 µm的金刚石磨粒且抛光盘转速为30 r/min时,材料去除率和表面粗糙度分别可以达到2.27 µm/min和21.3 nm。此外,通过偏心研磨实验,证明重心位置变化确实可以影响密封环上各点的材料去除率变化。

Abstract: The non-contact hydrostatic mechanical seal ring is the key element of the coolant pump for shaft seal. Pre-deformation plane lapping method is a cost-effective and efficient method for machining the seal rings. The accuracy of the end face of seal ring is dominated by the accuracy of pre-defor- mation and the uniformity of the material removal rate in lapping process. In this paper, the re-moval characteristics of cemented carbide are researched by plane lapping experiments. The re-sults show that the abrasive size, pressure and rotation speed of lapping plate obviously affect the material removal rate and roughness. When the diamond abrasive of 2 μm is used and the rotation speed of lapping plate reaches 30 r/min, the material removal rate and the roughness are 2.27 µm/min and 21.3 nm respectively. Moreover, eccentric pressure in lapping process through ad-justing the position of mass center of weight can influence material removal rate.

文章引用: 王 宇 , 左云盛 , 金洙吉 (2015) 硬质合金环研磨加工中的材料去除率分析。 机械工程与技术, 4, 127-134. doi: 10.12677/MET.2015.42013

参考文献

[1] 王玉明, 黄伟峰, 李永健 (2011) 核电站一回路用机械密封. 摩擦学学报, 4, 408-416.

[2] 王玉明, 刘伟, 刘莹 (2011) 非接触式机械密封基础研究现状与展望. 液压气动与密封, 02, 29-33.

[3] 彭旭东 (2013) 核主泵用机械密封的现状与展望. 第十一届全国摩擦学大会论文集, 兰州, 1.

[4] 洪振旻 (2009) 大亚湾核电站核主泵机械密封泄漏量异常研究. 硕士论文, 上海交通大学, 上海.

[5] Brinksmeier, E., Mutlugunesa, Y., Klocke, F., et al. (2010) Ultra-precision grinding. CIRP Annals, Manufacturing Technology, 59, 652-671.

[6] Young. L.A., Key, B., Philipps, R., et al. (2003) Mechanical seals with laser machined wavy SiC faces for high duty boiler circulation and feedwater applications. Lubrication Engineering, 59, 30-39.

[7] Lebeck, A.O. and Young, A. (1989) Wavy tilt dam seal ring and apparatus for shaping seal rings. US patent No. 4887395.

[8] 周平, 戴恒震, 金洙吉, 等 (2014) 周向波度密封环预变形平面研磨加工中的变形分析. 机械工程学报, 优先出版.

[9] 贾佐诚, 陈飞雄, 吴诚 (2010) 硬质合金新进展. 粉末冶金工业, 3, 52-57.

[10] 张晓峰, 方亮, 邢建东, 等 (2000) 二体磨损与三体磨损之间的关系. 西安公路交通大学学报, 3, 93-97.

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