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转速下
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  rotating speeds
     The controlling-theory of flow is also proved, namely, the flow is mainly controlled by the inflow effect at lower rotating speeds (50rpm and 300rpm), and by rotating effect at higher speeds (1300rpm and 1700rpm), by both factors at transition speed (800rpm).
     实验结果还进一步证明了盘腔内部流场控制理论,即,低转速下(50rpm和300rpm)进口进气效应控制内部流场,过渡转速下(800rpm)进口进气效应和盘腔旋转效应共同控制内部流场,高转速下(1300rpm和1700rpm)盘腔旋转效应控制内部流场。
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     J~ω~1/2 curves obtained at different rotating speeds were analysed and confirm that the brightener's cathodic behavior accords with RDE theoretical equation.
     并通过分析不同转速下的J~ω1/2曲线,确定了该光亮剂的阴极行为符合列维奇提出的旋转圆盘电极理论公式。
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     The complexity of pressure fluctuation dynamics in submerged circulative impinging stream reactor (SCISR) with different rotating speeds was studied by using the multi-scale and R/S analysis method. The Daubechies second order wavelet was firstly used to decompose pressure signals at different rotative speeds to 1—9 scale detail signals and scale approximation signals.
     对浸没循环撞击流反应器不同转速下的压力波动信号用Daubechies二阶小波在1~9尺度下进行分解,并分别对分解的信号进行R/S分析.
短句来源
     Thus, the frequencies of different vibrations under different rotating speeds of the output shaft can be realized.
     能够实现输出轴不同转速下的不同振动频率。
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     With the influence coefficient estimation and the gain matrix calculation for each discretized rotating speed,a gain table is constructed corresponding to the individual discretized rotating speeds,so the gain scheduling control can be implemented to the quasi steady-state active balancing system of the speed-varying rotor.
     通过每个离散转速下影响系数的估计和增益矩阵的计算,形成对应于各离散转速的增益表,从而实现变速转子准稳态主动平衡系统的增益调度控制。
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  “转速下”译为未确定词的双语例句
     Machining Center with Mechanical Accuracy 3μm under the Spindle Speed 20 000r/min
     在20 000r/min的高转速下机械精度为3μm的加工中心
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     The results show that the component 2X (X referred to the rotor’s rotating frequency) emerged at 1/2 and 1 times of critical rotational speed, however 1/2X, 3/2X, 2X and 3X at 2 times .
     发现发生裂纹故障时,在1/2和1倍临界转速下,产生2X谐波; 而在2倍临界转速附近产生1/2X,3/2X,2X和3X谐波。
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     simulate the representative flow field in metering section of the triple-screw extruder, consisted with three-thread element with pitch 75mm, at 60, 120, 180, 240 and 300rpm.
     模拟分析首先以螺距75mm的三头螺纹元件为代表,计算由其构成的三螺杆挤出机在60、120、180、240及300rpm转速下的流场,分析流动规律,并分析了特有的中心区在输送、建压方面的作用。
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     By calculating two cylindrical shells with different ordering of the laminates ([0°/90°/90°/0°] and [0°/90°0°/90°), the effects of rotating speed、geometric nonlinear and ordering of the laminated on the natural characteristics of cylindrical shells are discussed in detail.
     通过研究[0°/90°/90°/0°]和[0°/90°/0°/90°]两种铺层圆柱壳在不同转速下的固有特性,揭示了复合材料旋转圆柱壳的固有特性随转速及铺层方式的变化规律。
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     PARC Corporation the behaviours of corrosive wear of No. 45 steel, Cr17Ni2, and 1Cr18Ni9Ti were studied on the self-made corrosive wear apparatus at different rotating velocities and in the slurry medium of 10% H_2SO_4+100%SiC. The corrosive potentials and polarization resistance were measured as a function of the time.
     PARC公司生产的M351系统,对45~#、1Cr18Ni9Ti、Cr17Ni2等3种材料在不同转速下往10%H_2SO_4+10%Sic砂浆中的腐蚀磨损行为进行了研究,完成了腐蚀磨损过程中电位、极化阻率随时间变化曲线的测定。
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  相似匹配句对
     the possibility of sampling under high engine speed.
     高转速取样的可能性。
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     After cultivating 72 hours,the highest CMC-ase activity would be 4 731.8 μg·30 min~(-1)·mL~(-1) wit the concentration of deoxidize glucide being 5 012.2 μg·mL~(-1).
     min-1转速发酵72 h。
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     measurement of rotation speed;
     转速的测试;
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     The Research of the Measuring of Rotation Speed
     转速测量仪
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     coma
     昏迷()
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  rotating speeds
It shows that dissolution rates of dolomite are related with rotating speeds at conditions far from equilibrium.
      
A commercial AA2618 alloy was treated through melt spinning at rotating speeds of 20 and 40 m·s-1.
      
A new method is proposed to separate vibration signals of inner and outer rotors for a system with very little difference in rotating speeds.
      
Experiments were repeated at various rotating speeds ranging from 2000 to 5000?rpm.
      
At various rotating speeds, frequencies accounting for hub size, beam cross-section orientation and curvature have been computed and presented by curves.
      
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This paper discusses the possibility and reality of adopting flexible rotors in marine steam turbines. Firstly, it deals with the advantages of using flexible rotors in marine steam turbines. In order to reducing the specific weight of the turbine equipment and improving the manoeuvreability, it is advisable to consider the adoption of flexible rotors in modern high speed steam turbines. In this paper, it explains that with high speed turbines, it is difficult to obtain a really rigid rotor due to the influence...

This paper discusses the possibility and reality of adopting flexible rotors in marine steam turbines. Firstly, it deals with the advantages of using flexible rotors in marine steam turbines. In order to reducing the specific weight of the turbine equipment and improving the manoeuvreability, it is advisable to consider the adoption of flexible rotors in modern high speed steam turbines. In this paper, it explains that with high speed turbines, it is difficult to obtain a really rigid rotor due to the influence of the support rigidity. Though the first critical speed is designed to be 20~30% above the working speed, the actual first critical speed often falls down to a value below the working speed. By calculation, it can be proved that with a well-balanced rotor, the deflection of the rotor due to vibration when operating at a speed near or equal to the first critical speed for a fairly long period is very small, and we can expect the rotor working in a satisfactory manner. The paper also discusses the problem of self-excited vibration of a supercritical rotor. It explains that whirling effect due to the instability of oil film is the main opposition of the reliability of flexible rotor, and the oil whirling only appears when the working speed is at a value of twice the first critical speed. Therefore we must keep the working speed lower than that value. The paper also lists the region of the. critical speeds of flexible rotors. In conclusion, the author expresses his own opinions with regarding to the adoption of flexible rotors in high speed marine steam turbines, and claims that it will be advantageous and possible.

本文主要讨论舰船汽轮机采用柔性转子的可能性及现实性问题。文章首先说明了舰船汽轮机采用柔性转子的好处,着重说明了由于近年来舰用汽轮机的转速提高及设计点后移,为了进一步减轻重量及提高操纵性和机动性就要求采用柔性转子。文章论证了对高速汽轮机来说,由于支承刚性的影响,实际上很难得到刚性转子。尽管计算临界转速大于工作转速(20~30)%,而实际的临界转速仍然有可能落入工作转速以内。文中通过计算,证明了即使在临界转速下长期运转,只要转子平衡得好,振动挠度是很小的,转子工作亦是可靠的。文章还对超临界转子的自激动问题进行了讨论,并指出由于油膜不稳定性而引起的自激振动严重地影响柔性转子的工作可靠性。这种自激振动只是在工作转速大于二倍临界转速时才发生,因此必需使工作转速小于二倍临界转速。文中大致地给出了采用柔性转子时选取临界转速的范围。文章最后对舰船汽轮机采用柔性转子的可能性问题提出了意见,认为舰船高速汽轮机采用柔性转子是可能的,并且有一系列的好处。

This paper deals with the different characteristics of the flexible and the rigid rotor balancing. To begin with the characteristic of the vibration of flexible rotor. it decribes the fundamental principle on the balancing of flexible rotors. This paper gives us a general idea of the model test about the balancing of flexible rotor in the test room.The result of the model test of flexible rotor, shows that, by using the principle of orthogonslity of the modes of vibration we may select the balancing correction...

This paper deals with the different characteristics of the flexible and the rigid rotor balancing. To begin with the characteristic of the vibration of flexible rotor. it decribes the fundamental principle on the balancing of flexible rotors. This paper gives us a general idea of the model test about the balancing of flexible rotor in the test room.The result of the model test of flexible rotor, shows that, by using the principle of orthogonslity of the modes of vibration we may select the balancing correction plane with regard to the curve of the mode, and then correct the unbalance on this mode by measuring the vibration of the bearing pedestal. By balancing the rotor with modes in

本文叙述了挠性转子动平衡与刚性转子动平衡的不同特点。从分析挠性转子的振动特性出发,阐述了挠性转子动平衡的基本原理。本文介绍了在实验室里进行挠性转子动平衡模型实验的概况。实验结果指出,对挠性转子找平衡,可以通过对轴承坐振动的测量,再根据振型规律及振型函数正交原理,参考振型曲线选择平衡校正平面的位置,逐阶地对转子进行质量校正,最后达到工作转速下转子的总体平衡。本文还介绍应用这个实验成果,有效地对国产第一台20万瓩废汽轮发电机及30万瓩双水内冷汽轮发电机转子进行现场平衡,大大地减少了平衡次数,缩短了找平衡工作时间,提高了平衡质量,达到了动平衡的技术要求。

This paper concerns a photoelastic investigation with scattered light of three dimensional stresses in rotating turbine discs. The test method employed is non-destructive, so that only one model is needed for investigating stresses in a rotating disc at various speeds, and for determining the static shrink fit stresses. The stresses at various speeds being known, then the speed at which shrink fit pressure is counter balanced may be determined.

本文介绍了用散光法对旋转叶轮应力的实验研究.由于这是一种非破坏试验方法,所以仅一个模型就可以对几种不同转速以及静过盈状态下的应力进行测定.根据几种不同转速下套装叶轮应力的情况,可以确定松动转速.

 
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