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首页> 外文期刊>Thermal engineering >The Damping Capacity of Damping Devices during Rotor-over-Stator Rolling
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The Damping Capacity of Damping Devices during Rotor-over-Stator Rolling

机译：转子滚动过程中阻尼装置的阻尼容量

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The article presents results of investigating the influence of elastic damping devices that secure the rotor and the stator under high-amplitude oscillations under unfavorable development of an accident, e.g., upon rubbing of the rotor against the stator. Motion equations for the oscillations of the rotor in the clearance between the rotor and the stator and the oscillations of the rotor rubbing against the stator are written at adopted parameters of the stator considering not only the rigidity of the stator but also the energy losses under deformation of the stator components during the oscillations. Sudden unbalance of the rotor is taken as the initial excitation. A case of severe unbalance of the rotor is examined when, under oscillations accompanied by rubbing, the damping devices experience fairly severe strains in different rolling modes. The investigations were conducted using a rotor that had been affected by accidents accompanied by destruction of the bearings under rubbing in the absence of damping devices. A dynamic model of a symmetrical two-bearing rotor is considered. ADP-2400 shock absorbers served as dampers; the dynamic impact properties of the former had been determined using shock-testing machines. A possibility of the development of self-excited oscillations in the form of asynchronous rolling is considered depending on the absorption factor of the elastic damping devices. It is shown that no asynchronous rolling develops at definite absorption factor values. The oscillations of the rotor are restricted to the synchronous rolling at rotor–stator contact interaction forces that do not endanger the integrity of the turbine plant structure. The elastic damping devices with absorption factors above certain values eliminate the possibility of the development of self-excited oscillations in the form of asynchronous rolling and a practically unlimited increase in the rotor–stator interaction forces and, consequently, eliminate the danger of destruction (self-destruction) of the power-generating plant. In a sense, we can speak about the damping capacity of elastic damping devices during the evolution of an accident accompanied by rubbing of the rotor against the stator. The rigid mount of the stator on the foundation in the absence of damping devices increases the risk of the catastrophic development of the emergency considerably reducing the evolution time of the rolling and the possibility of using safety devices. A conceptual scheme that systemizes the general regulations for preventing TP accidents is provided.
机译：该物品呈现了研究在不利地发展的高幅度振荡下固定转子和定子的弹性阻尼装置的影响，例如，例如在摩擦转子靠在定子时。转子和定子之间的间隙中的转子振动的运动方程以及转子摩擦对定子的振动，考虑到定子的刚性，而且在定子的刚性下面考虑变形的能量损失在振荡期间的定子组件。转子的突然不平衡被视为初始激发。当伴随摩擦伴随的振荡时，检查了转子严重不平衡的情况，阻尼装置以不同的轧制模式体现相当严重的菌株。通过在没有阻尼装置的情况下，使用受摩擦下的轴承破坏的转子进行调查。考虑了对称双轴承转子的动态模型。 ADP-2400减震器用作阻尼器;前者的动态冲击性能已经使用冲击试验机确定。根据弹性阻尼装置的吸收因子，考虑以异步轧制形式开发自激振荡的可能性。结果表明，在明确的吸收因子值下没有产生异步轧制。转子的振动限于转子定子触头相互作用力的同步轧制，其不会危及涡轮机植物结构的完整性。具有高于特定值的吸收因子的弹性阻尼装置消除了异步轧制形式的自激振荡的可能性，以及转子 - 定子相互作用力的实际上无限制地增加，因此消除了破坏的危险（自我 - 发电厂的设施。从某种意义上说，我们可以谈论弹性阻尼装置在事故的演变过程中的阻尼能力，伴随着转子对定子的摩擦。在没有阻尼装置的情况下，定子的刚性安装座在基础上的基础上增加了紧急情况灾难性发展的风险，显着降低了轧制的演化时间和使用安全装置的可能性。提供了一种系统化防止TP事故的一般规定的概念计划。

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