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friction power loss
相关语句
  摩擦功耗
     A formula of the friction power loss is derivated from Langevins formula and Navier Stokes equation by Newton inner friction modular and it is in good agreement with the experiments.
     选择牛顿内摩擦模型 ,Langevins和 Navier-Stokes方程导出了磁粒子的旋转摩擦功耗公式 ,并由实验进行了验证 .
短句来源
     In the normal temperature environment,the friction coefficient of bio-additive and modification additive are 0.085 8 and 0.098 859.The computation results show that the friction power loss of bio-additive decreases 82.3 percent,and that of modification additive decreases 80 percent around the top dead centre.
     在常温条件下,原剂和改性添加剂的摩擦因数分别为0.085 8和0.098 859。 通过计算发现,在上止点位置附近,加入原剂和改性添加剂后摩擦功耗分别降低了82.3%和80%。
短句来源
     Research on the Friction Power Loss of the Magnetic Fluid Seal
     磁流体密封摩擦功耗的研究
短句来源
     Friction power loss formula is derivated from Newton inner fraction modular by Langevins formula and Navier-Stokes equation.
     以牛顿内摩擦模型由朗之万和纳维 -斯托克斯方程导出磁粒子的旋转摩擦功耗公式。
短句来源
     From the point of view of decreasing the secondary motion of piston and friction power loss of piston skirt cylinder wall tribopair, the design of structure parameters of piston is studied and some important results are obtained.
     并从减小活塞的二阶运动和摩擦功耗两个方面研究了活塞结构参数的设计。
短句来源
更多       
  摩擦功率
     Friction power loss of the O-ring and mechanical seal was calculated in autonomous underwater vehicle tail stalk seals.
     计算了橡胶O形圈和机械密封结构在水下航行器尾轴密封中的摩擦功率损耗。
短句来源
     The corresponding computer program can be used to calculate the entire trajectory of piston and the friction power loss,which has the excellent convergence.
     该模型采用优化的数值分析方法,使计算程序有较好的收敛性,能计算出整个四冲程范围内的活塞二阶运动和摩擦功率的轨迹。
短句来源
     It is the purpose of the paper to deduce the formula for calculating friction power loss by motion of the magnetic fluid,with the analysis of the curve of speed distribution of the Newton Fluid inner Friction Law as a base.
     在分析牛顿液体内摩擦定律的运动速度分布规律基础上,推导出计算磁流体运动中摩擦功率损失的公式;
短句来源
     The result shows the seal element can hold back the leakage through axial clearance and reduce friction power loss between scroll tooth and bottom of scrolls.
     结果表明:密封条不但可以阻止通过轴向间隙的泄漏,而且降低了涡旋齿与涡盘底部摩擦功率损失。
短句来源
     The Influence of Piston Skirt Profile on the Secondary Motion and Friction Power Loss of Piston
     活塞裙部型线对活塞系统二阶运动和摩擦功率的影响
短句来源
更多       
  摩擦功率损耗
     Friction power loss of the O-ring and mechanical seal was calculated in autonomous underwater vehicle tail stalk seals.
     计算了橡胶O形圈和机械密封结构在水下航行器尾轴密封中的摩擦功率损耗
短句来源
  “friction power loss”译为未确定词的双语例句
     Analysis of Rolling Friction Power Loss of Roller Bearing Clutch
     滚柱轴承离合器滚动摩擦功耗分析
短句来源
     In addition, because the viscosity of water is low, the power loss of water film between the porting pair mainly depends on the leakage power loss while the friction power loss caused by the viscosity of water is small so that it can be ignored compared with the leakage one.
     另外,由于水的粘度很小,配流副的水膜功率损失主要取决于泄漏功率损失,致使因水的粘度而引起的摩擦损失功率很小,较泄漏功率损失而言可忽略。
短句来源
     For the vibration of the cylinder, friction force and the friction power loss of the cylinder piston system become less, the minimum oil film thickness, the displacement and the velocity of piston secondary motion become larger.
     通过与不考虑缸体振动时的相应结果对比表明:考虑缸体的结构振动后,缸套 活塞间的摩擦力和摩擦功耗减小,油膜厚度、活塞的二阶运动位移及速度增大.
短句来源
     Results show that the order of factors contributing to friction power loss is temperature,rotating speed and load,the magnitude of power loss estimated in primary design stage is about 1%,which still has a small margin.
     在正常情况下轴承摩擦损失功率数量级一般不大,方案设计时取设计工况传递功率的1%仍有一定的裕度。
短句来源
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  friction power loss
By minimizing the cost function, which is the sum of the friction power loss and the metabolic energy proportional to blood volume, Murray derived an optimal condition for a vascular bifurcation.
      
It can also be expressed as percentage of the friction power loss in the unmanipulated reference case.
      


Floating ring bearing contributes to an increased rotary speed of drill bit, which is the result of reduced friction power loss by the rotation of the floating ring. It is generally believed that the principal parameters are the gaps in the inside and the outside of the floating ring. An experiment of a floating ring bearing unit in a rock bit has been conducted under simulated operating conditions and with the outside gap greater than the inside gap that is commonly used at home and abroad. However,...

Floating ring bearing contributes to an increased rotary speed of drill bit, which is the result of reduced friction power loss by the rotation of the floating ring. It is generally believed that the principal parameters are the gaps in the inside and the outside of the floating ring. An experiment of a floating ring bearing unit in a rock bit has been conducted under simulated operating conditions and with the outside gap greater than the inside gap that is commonly used at home and abroad. However, the floating ring was hardly able to rotate. Theoretical analysis of the lubrication state for rock bit under heavy load and low speed has been made in order to find out the suitable gaps. The lubrication state is a mixed or boundary one, so equations of floating ring bearing with full oil film lubrication are not suitable for rock bit′s bearings, and the effect of metal contact and elastic deformation on the surface should be consi-dered. The experimental results agree with theoretical analysis that the outside gap of a floating ring should be much smaller than the inside gap to keep the floating ring rotate satisfactorily. The results can be used in the design of floating ring bearing of a rock bit.

由于浮动套轴承的浮动套可以转动,降低了摩擦功率,从而可以提高牙轮钻头的转速。使浮动套转动的主要参数是浮动套的内、外间隙值。根据牙轮钻头轴固定,牙轮转动的工作特点,进行牙轮钻头浮动套轴承单元实验,发现按国内、外现用内小外大的间隙值配置参数,浮动套不会转动。通过对重载低速工况下的牙轮钻头浮动套轴承的润滑状态进行理论分析,得出属于混合润滑或边界润滑状态的结论。并证明全膜润滑状态下的浮动套轴承计算公式,不适用于牙轮钻头浮动套轴承,后者需考虑金属接触及弹性变形的影响,间隙配置应使外间隙远小于内间隙。实验结果与理论分析相一致。本文得出的间隙配置原则,可供牙轮钻头浮动套轴承设计使用。

A mathematical model to describe the mixed lubricated piston rings and their friction performances was proposed and its results were compared with that from other lubrication models. In mixed lubrication model, the load and friction power sharing between the oil film and asperity apices is considered, so the model makes it easy to discuss the effect of the oil film temperature variation caused by the application of low heat rejection technique and surface roughness, etc. on the ring pack friction power loss....

A mathematical model to describe the mixed lubricated piston rings and their friction performances was proposed and its results were compared with that from other lubrication models. In mixed lubrication model, the load and friction power sharing between the oil film and asperity apices is considered, so the model makes it easy to discuss the effect of the oil film temperature variation caused by the application of low heat rejection technique and surface roughness, etc. on the ring pack friction power loss.

本文给出了描述内燃机活塞环组混合润滑状态及摩擦特性的通用数学模型,并将其计算结果和其它三种润滑模型的结果进行了比较。在混合润滑模型中,由于同时考虑了油膜和表面粗糙凸峰相接触所承担的外载及其与摩擦功的关系,因此可以方便地用于讨论燃烧室采用隔热技术后油膜温度升高对环组摩擦功的影响。此外,文中还对表面粗糙度等的影响作了概要的讨论。

in the past, only the fluid shearing stress of lubricant oil between piston ring andcylinder wall was calculated in order to decide the friction power loss of engine. This methodobviously could not reflect the lubricating state of the friction couple objectively. In fact, thefriction force is created by two asliects: one is the fluid shearing stress , the second is the shearingeffect of the asperities between the surfaces. So far, however, there have been little reportsstudying on this two aspects...

in the past, only the fluid shearing stress of lubricant oil between piston ring andcylinder wall was calculated in order to decide the friction power loss of engine. This methodobviously could not reflect the lubricating state of the friction couple objectively. In fact, thefriction force is created by two asliects: one is the fluid shearing stress , the second is the shearingeffect of the asperities between the surfaces. So far, however, there have been little reportsstudying on this two aspects comprehensively. In order to provide scientific basis for the design andealculation of the low friction power loss of the package of rings, this paper`presents a calculationmethed for the friction power loss of piston ring-cylinder wall of different kinds of engines in thelight of the analysis of the lubricating state of rings in the course of motion. Furthermore , using thismethod , the friction loss power of friction couple of piston ring-cylinder in S195 diesel engine iscalculated and the influencing factors of friction power loss are` also discussed. For verifying thiscalculation method, the film thickness was measured using the simulated test. The test resultsshowed that the theoretical values and the measured values are almost identical.

以往在计算内燃机活塞环-缸套摩擦副的摩擦功耗时,只是计算活塞环与缸套之间流体润滑剂的粘性剪应力,这显然不能客观地反映出该摩擦副的润滑状态。实际上,活塞环-缸套间的摩擦力产生于两个方面,一是粘性流体的剪应力,二是摩擦界面相互接触峰元的剪切作用。然而截至目前,针对这两方面进行全面分析研究的报道却还很少,因此,为了给低摩擦功耗环组的设计提供科学依据,基于对活塞环在运动过程中润滑状态的分析,提出了一种适用于不同类型内燃机设计计算的活塞环-缸套摩擦功耗的计算方法,并以其对现有结构的S195柴油机活塞环-缸套摩擦副的摩擦功耗进行了计算,同时还对影响摩擦功耗的因素作了考察与讨论,利用台架试验测量油膜厚度的方法对这种算法进行试验验证的研究结果表明,理论值与实测值吻合得很好。

 
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