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硬支承平衡机测量与校正系统的研制
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摘要
转子由于其质心偏离其转轴而导致的不平衡,在高速运转过程中会导致转子本身产生振动,此振动会加速轴承的损耗并导致机械寿命的缩短。为改善转子的偏心而对不平衡转子进行测试与校正就成了必需的手段。对转子进行平衡作为转子制造的一道工序,对提升产品质量有重要的作用。
     课题在对国内转子制造业现状进行调查了解的情况下,针对刚性盘状转子的不平衡情况,开发了测试与校正功能一体化的立式平衡机。能够显著改善目前国内中小企业手动平衡效率低下的情况。
     论文从测试与校正两个方面对转子不平衡问题进行了研究。主要内容包括:
     对动平衡技术的国内外发展现况和动平衡原理进行了较为详细的阐述,针对转子不平衡的情况,提出了适合盘状刚性转子的不平衡检测方法,及其实现手段,并详细讨论了测量系统的设计细节。内容包括基于影响系数法的不平衡检测方法,基于MCU的主控电路的设计,基于开关电容的自动跟踪滤波器的设计,锁相倍频电路等。
     详细论述了针对皮带轮和刹车盘,这两种不同类型的盘状刚性转子而采用的不同的校正方法,校正误差的产生与解决方法。包括刀具的选择,校正模型的设计,伺服电机的选择与控制,可编程控制器硬件的设计与梯形图程序的编写,以及基于组态王的上位机软件的编写等。
The rotor because of its centre of mass away from its axis caused by an unbalance in the process of high-speed operation will lead to the rotor itself to vibrate. This vibration will accelerate the loss of bearing and lead to shortening of mechanical life. In order to improve the rotor eccentricity, testing and correcting of the rotor unbalance becomes necessary means. Rotor balancing as a process of the rotor manufactured plays a important role of improve product quality.
     This thesis invents the vertical balancing machines of testing and correcting function to the rigid rotors based on the current situation of domestic manufacturers. This method can significantly improve the low efficiency of manually correction, in domestic small and medium enterprises.
     Papers studied from the two aspects of testing and correcting in the rotor unbalance. The main contents are included as following:
     The development of balancing machine at home and abroad was introduced, and more details about the principle of dynamic balance. The testing method and of unbalance disc-rigid rotor is discussed. The details which design the testing system including coefficient method, MCU circuit design, auto-tracking filter which based on switched-capacitor auto-tracking filter, phase-locked multiplier circuit were introduced.
     For the pulley and the brake disc, these two different types of discoid rigid rotor, we use different correction methods. The error theory, tool selection, correction model design, the choice and control of servo motors, PLC (programmable logic controller) design and ladder programs, the software design of Industrial Personal Computer which based on configuration software.
引文
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