大型泵轴承外循环冷却用辅叶轮设计  

Design of axial auxiliary impeller in external circulation cooling system of large pump

作　　者：贾允[1] 贾岩巍 魏显著 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨电气动力装备有限公司,黑龙江哈尔滨150066 [3]水力发电设备国家重点实验室,黑龙江哈尔滨150040

出　　处：《排灌机械工程学报》2015年第2期93-97,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：科技部国家国际合作项目(2011DFB01660)

摘　　要：为解决核主泵双向推力轴承润滑油外循环冷却系统循环动力所需辅助叶轮的设计验证问题,采用CFD分析方法,对油叶轮内特性压力流速进行数值分析.通过分析流道中间流面相对速度矢量分布,验证导叶进口流动有无冲角、叶型设计及与导叶匹配的优劣.数值分析直观反映了叶型设计形成的流动参数及流动规律.结果显示,导叶出口速度方向主要为切向,这有效降低了流体对导叶出口后侧装置的冲撞作用.通过润滑油循环装置模拟试验,将数值结果与试验数据进行对比,在全部5个工况下,两者差异均小于5%,设计结果满足润滑油的流量、扬程、无冲击流动等运行要求.文中采用的数值分析方法可替代逐次试验验证的轴流式辅叶轮设计方法,并成功应用于核电站反应堆冷却剂泵的产品设计.In order to design and validate the auxiliary impeller required by the cycle power of the oillubricated external circulation cooling system on the reactor coolant pump＇ s bi-directional thrust bearing,the CFD method is applied to present a numerical analysis for the pressure feature and flow rate within the oil impeller. The objective is to demonstrate the vector distribution of the relative velocity on the center surface of the flow path,and to verify the possibility of creating any flush angle from the inlet flow of the vane,the pros and cons of the vane shape design and how well it functionally matches the vane. The numerical analysis intuitively reflects the flow parameters and patterns generated by the designed shape of the vane,indicates the fact that the velocity at the vane＇ s inlet mainly affects the tangent angle; thus,effectively lowers the damaging impact on any system devices located adjacent to the rear outlet of the vane. Through simulation of the oil-lubricating circulation,numerical analysis arecomparatively analyzed with the testing results,for all 5 complete working processes,deviations are uniformly less than 5% and precisely satisfied lubricating oil＇ s flow,head,zero-impact on flows and other operating requirements. This paper concludes the practical application of a simplified numerical analysis and reasoning could replace the repetitive testing employed in the traditional design process for axial auxiliary impellers. It has been successfully applied in the design of reactor coolant pump.

关 键 词：大型泵 轴承 外循环冷却 轴流式辅叶轮 设计 

分 类 号：TB42[一般工业技术]