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The power circulation between the secondary cells won't affect its efficiency.


However, a better solution would be to have the ability to rapidly vary real power without impacting the system through power circulation.




 The construction of our power circulation type testng machine far vbelt as well as the devices and methods for measuring angular velocities of pulleys, the fractional difference between their velocities and the transmitting power are introduced. A discussion of two major problems concerning the principles of the testing machinethe continuous operation of the machine and power circulation loading as well as power transmission is made and the trial performance of the machine briefly treated.... The construction of our power circulation type testng machine far vbelt as well as the devices and methods for measuring angular velocities of pulleys, the fractional difference between their velocities and the transmitting power are introduced. A discussion of two major problems concerning the principles of the testing machinethe continuous operation of the machine and power circulation loading as well as power transmission is made and the trial performance of the machine briefly treated.  本文介绍了封闭式三角胶带试验机的结构,以及测量转速、转速差和传递功率的装置及方法。探讨了封闭式三角胶带试验机原理方面的两个主要问题——连续运转问题,封闭加载与动力传递问题。并简介了本试验机的初步使用情况。  This paper deals with the differences of opinions between the author of "Exergy & Exergy Analysis" [1] and the authors of the present paper in determining the optimum enthalpy of feed water in a steam power circulation. The author of paper [1] holds the view that the optimum enthalpy of the feed water obtained from exergy analysis is lower than that from conventional enthalpy analysis. So, according to the conclusion of exergy analysis, it is better to take the lower enthalpy of the feed water The method... This paper deals with the differences of opinions between the author of "Exergy & Exergy Analysis" [1] and the authors of the present paper in determining the optimum enthalpy of feed water in a steam power circulation. The author of paper [1] holds the view that the optimum enthalpy of the feed water obtained from exergy analysis is lower than that from conventional enthalpy analysis. So, according to the conclusion of exergy analysis, it is better to take the lower enthalpy of the feed water The method of enthalpy analysis and that of exergy analysis are both employed in this paper to discuss the same problem and we arrived at a conclusion that, to the same kind of steam power circulation operating at the same condition, no matter whether the method by exergy analysis or enthalpy analysis we used to find the optimum parameter, the conclusion is just the same. There is no question of one being better than the other. We would like to also point out the reason here why the author of paper [1] arrived at the undefined conclusion.  本文就“与分析”一文中有关蒸汽动力循环中确定最优给水焓值的讨论持有不同的看法。[1]文认为对于抽汽回热给水蒸汽动力循环来讲,“(火用)分析得到的最优给水焓值i_(sn),要比传统的焓分析得到的值低。所以根据(火用)分析的结果,可以选取更为合理的给水焓值。”为此本文用焓分析及(火用)分析的方法探讨了该问题。结论是:对同类型的蒸汽动力循环来讲,在相同的前提下,无论用(火用)分析还是用焓分析寻求最佳参数时,结论是一致的,不存在何者更为合理的问题。且指出了[1]文之所以得到这一不确切结论的根由。  In this paper, multimember planetary gearsets consisting of double pinions or duplex or triplex pinion are discussed,the kinematical equations and planar velocity diagrams and composite mechanism are analysed,and the theoretical method and procedure to design the layout of multimember planetary gearboxes are established.The realizable number of speeds of a multimember planetary gearset is equal to that of a planetary train consisting of three to five ordinary threemember planetary gearsets,so the scheme... In this paper, multimember planetary gearsets consisting of double pinions or duplex or triplex pinion are discussed,the kinematical equations and planar velocity diagrams and composite mechanism are analysed,and the theoretical method and procedure to design the layout of multimember planetary gearboxes are established.The realizable number of speeds of a multimember planetary gearset is equal to that of a planetary train consisting of three to five ordinary threemember planetary gearsets,so the scheme and construction to meet the speed ratios required will thus be simplified,bringing many advantages so far as dimension, weight, efficiency cost, etc. are concerned. In addition, no internal power circulation will emerge in any case.The rules and methods presented here has come about as developments based on the layout design of three member planetary trains and trains of variable connection type with three degreeoffreedom.They make it possible to extend the area of applicability of the theoretical method of designing planetary gearbox schemes.New satisfactory layouts meeting the speed ratios required could thus be found easily.  本文讨论由双星或双联行星或三联行星构成的多元件行星齿轮传动,分析其运动学方程组和速度平面图及共复合机构,建立设计多元件行星齿轮变速箱的理论方法和步骤。 一个多元件行星排所能实现的档数,相当于3到5个普通三元件行星排所组成的行星传动的档数,其复合应用所能实现的档数更多。因而按要求的一定传动比值设计的力案和结构可以得到简化,带来在尺寸、重量,效率和成本等许多方面的优点。此外,在任何情况下不会出现传动内部的功率循环。 本文所提出的规律和理论方法是在三元件行星传动和换联式三自由度行星传动方案设计基础上的进一步发展,使行星变速箱方案设计理论扩展到一个新的领域,可以方便地创造出实现所需传动此的许多优良方案。   << 更多相关文摘 
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