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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >EXPERIMENTAL STUDY OF DESTABILIZING FORCE FROM CENTRIFUGAL COMPRESSOR IMPELLER
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EXPERIMENTAL STUDY OF DESTABILIZING FORCE FROM CENTRIFUGAL COMPRESSOR IMPELLER

机译：离心压缩机叶轮失稳力的实验研究

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摘要

Subsynchronous vibration of centrifugal compressor is one of the important problems of rotating machinery. Many works have been continued for the problem. The stabilizing efforts in labyrinth seals and bearing are applied successfully; however, the destabilizing force from impeller which is shown in Wachel's equation has still many questions. Even in qualitative meaning the problem could not be fully solved. Then, authors make a plan to solve this problem from the basic point of phenomenon. At first, the basic experimental model was developed to realize the subsynchronous vibration in laboratory. The experimental model is based on the experience of axial turbine model which solved stability problem of partial admission operation. The model is composed by two special parts. One is fiber reinforced plastics impeller which has relatively large diameter and very light weight, the other is very slender rotor which gives low natural frequency and very small damping. These designs will realize the subsynchronous vibration even in small power (7.5kW) in laboratory. The excessive vibration due to low damping is solved by special designed amplitude limiter having small clearance and damper. [1] [2] The development of the experimental model was completed, the operation is started and the tendency of instability has been observed.
机译：离心压缩机的次同步振动是旋转机械的重要问题之一。针对该问题的许多工作已经继续进行。迷宫式密封件和轴承的稳定作用已成功应用；然而，沃切尔方程中所显示的叶轮失稳力仍然存在许多问题。即使从质的意义上讲，问题也无法完全解决。然后，作者从现象的基础上制定了解决该问题的计划。首先，开发了基本的实验模型以实现实验室中的次同步振动。该实验模型基于轴向涡轮机模型的经验，解决了部分进气道运行的稳定性问题。该模型由两个特殊部分组成。一种是纤维增强塑料叶轮，它具有较大的直径和非常轻的重量，另一种是非常细长的转子，具有较低的固有频率和很小的阻尼。这些设计甚至可以在实验室中以小功率（7.5kW）实现次同步振动。通过低间隙和阻尼器的特殊设计的限幅器解决了由于低阻尼导致的过度振动。 [1] [2]完成了实验模型的开发，开始了操作并观察到不稳定的趋势。

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