共查询到20条相似文献,搜索用时 140 毫秒
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斜轴泵与斜盘泵相比,舍去了滑履副,减少了泄漏,泵的容积效率较高。并且,目前斜轴泵采用组合轴承(液压力的轴向分力由两个串联排列的向心推力球轴承承受,径向分力由这两个轴承与另一个向心圆柱轴承一起承受),缩小了泵的尺寸,提高了它的使用寿命。另外,斜轴泵在抗污染方面也比斜盘泵好。因此,可以说斜轴泵在多方面体现了其优越性。 相似文献
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导轴承是立式长轴泵的重要部件。在立式长轴泵的运行过程中,导轴承的寿命都很短。针对此一缺陷,分析了导轴承寿命短的原因,并给出了具体的解决办法。 相似文献
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某核电站设备冷却水泵调试运行期间,出现泵驱动端和自由端恒位油杯油位低、启动时恒位油杯中润滑油吸入轴承箱导致轴承箱油位高(视油窗显示100%)、润滑油从轴承箱端迷宫密封处泄漏且轴承箱温度高等缺陷。随后,对设备冷却水泵诸多缺陷开展了专项治理工作,经对该泵轴承箱进行改造,消除了轴承箱迷宫密封漏油现象,为以后处理泵轴承箱恒位油杯油位低、启动时润滑油吸入轴承箱、轴承箱端迷宫密封漏油、轴承箱温度高等缺陷提供了参考。 相似文献
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锅炉给水泵轴承温度变化状态预测 总被引:1,自引:0,他引:1
为了预测锅炉给水泵轴承温度的变化情况,提高给水泵运行的安全性和经济性,采用了统计学习理论中的核心算法--支持向量机,建立了给水泵温度预测模型(SVAR).并通过一个实例,与基于灰色方法建立的预测模型(GM)和基于自回归方法建立的预测模型(AR)进行了比较.结果表明:基于支持向量自回归的给水泵轴承温度预测模型具有精度高、速度快、易于建模的特点.应用该方法建立的预测模型能够很好地预测给水泵运行中的温度状况,有效地避免给水泵运行中出现的故障. 相似文献
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潜油螺杆泵采油系统中轴向承载能力决定其排量、机组下潜深度、寿命等关键技术指标。根据潜油螺杆泵采油系统中轴向压力的计算方法计算出轴向载荷,对联轴装置中影响轴向承载能力的关键零部件——推力轴承进行了有限元分析。分析结果表明:总体应力分布比较均匀,但是偏向一侧,这与实际情况中,单向推力轴承承受偏心轴向载荷时的载荷分布是完全一致的。 相似文献
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为研究一种核主泵电机滑动轴承的可靠性,在少子样无法进行大量整机试验的情况下,分析了核主泵电机滑动轴承的工况,确定了其失效模式并绘制了故障树。采用ANSYS软件仿真分析了轴承重要单元受力情况,求解了单元应力分布,根据应力-强度干涉法,利用蒙特卡罗抽样法得到了单元可靠度;采用数据手册法得到了其他单元的可靠度,并计算得到了轴承的整体可靠度。对少数试制轴承的缩小推力瓦模型样本和原尺寸冷却器展开试验,结果表明该核主泵电机滑动轴承满足工程可靠性要求。 相似文献
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The current research of hydrodynamic bearing in blood pump mainly focuses on the bearing structure design.Compared with the typical plane slider bearing and Rayleigh step bearing,spiral groove bearing has excellent performance in load-carrying capacity.However,the load-carrying capacity would decrease significantly with increasing flow rate in conventional designs.In this paper,the special treatment is made to the upper spiral groove bearing to make sure that both the circulatory flowing and load-carrying capacity are high.Three-dimensional computational fluid dynamics(CFD) models in the space between rotor and shaft are developed by using FLUENT software.Effects of groove number,film height and groove depth on load-carrying capacity of the spiral groove bearings are investigated by orthogonal experiment design.The experimental results show that film height is the most remarkable factor to the load-carrying capacity.The variation tendency of load-carrying capacity reveals that the best combination of geometry is the one with groove number of 8,film height 0.03 mm and groove depth 0.08 mm.The velocity and pressure distributions in spiral groove bearings are also analyzed,and the analysis result shows that the distributions are in conformity with the design of the blood pump based on the principle of hydrodynamic bearing.The displacement of the rotor with the best combination parameters is tested by using laser displacement sensors,the testing result shows that the suspending performance is satisfactory both in axial and radial directions.This research proposes a bearing design method which has sufficient load-carrying capacity to support rotor as an effective passive hydrodynamic bearing. 相似文献
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通过分析轴套在齿轮泵中的作用和受力特点,提出了轴套结构优化设计的思路,用实例给出了单边径向浮动润滑轴套具体的设计方法。 相似文献
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针对流体静压轴承在液体火箭发动机涡轮泵中的设计和应用,以现有的滚动轴承支承的涡轮泵转子为应用对象,提出流体静压轴承的参数设计思路,采用粒子群优化算法设计得到支承刚度最大化的轴承结构参数组合,并计算分析所设计轴承的性能以及轴承-转子系统的动力学特性。分析表明:优化设计得到流体静压轴承的承载力和支承刚度可以满足要求,但轴承总流量达泵流量的21%,这会显著降低涡轮泵的总体效率;仅将滚动轴承改为流体静压轴承,而不改变其他结构或布局,转子的稳定性不能满足要求;涡轮泵流体静压轴承转子系统设计时应尽量将轴承布置在转子位移较大的位置,以充分发挥其阻尼作用。 相似文献
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含油轴承模型的比较分析 总被引:1,自引:0,他引:1
通过对含油轴承的结构模型和理论模型的比较,介绍了含油轴承的结构模型发展状况,包括变渗透度模型、磁流体含油轴承、含油轴承材料技术等。同时对比研究了理论模型的特点,包括Darcy模型、Slip-How模型、Brinkman模型、Boltzmann模型、紊流模型,论述了影响含油轴承摩擦学性能的因素,包含热效应、粗糙度效应、非牛顿效应和回油循环效应等。并且提出了含油轴承的理论发展问题,包括温度问题、噪音问题、二相流问题、各种摩擦学影响因素的综合系统研究和含油轴承失效机理过程研究。 相似文献
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In this paper, two types of water-lubricated hydrostatic conical bearings with spiral grooves for high-speed spindles are investigated. One has a rigid bearing surface and the other has a compliant one. In these bearings, pressurized water is first fed to the inside of the rotating shaft and then introduced into spiral grooves through feeding holes. Therefore, water pressure is increased due to the effect of the centrifugal force at the outlets of the feeding holes by shaft rotation and, furthermore, water pressure is also increased by the viscous pump effect of spiral grooves. The static characteristics of these bearings are theoretically predicted and calculated results are compared with experimental results. It was found that the compliant surface bearing had a larger load capacity in a relatively large bearing clearance than the rigid surface bearing, and lower bearing power consumption in a small bearing clearance although the load capacity is reduced. 相似文献