| 引用本文: | 孙新庆,全齐全,唐德威,邓宗全.一种压电换能器的结构设计与拉伸式装配方法[J].哈尔滨工业大学学报,2023,55(1):72.DOI:10.11918/202205105 |
| SUN Xinqing,QUAN Qiquan,TANG Dewei,DENG Zongquan.Structure design and tensile assembly method of a piezoelectric transducer[J].Journal of Harbin Institute of Technology,2023,55(1):72.DOI:10.11918/202205105 |
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| 摘要: |
| 压电换能器装配预应力直接影响产品性能。大直径压电换能器对装配预应力控制和压电陶瓷应力分布均匀性提出了更高的要求。为实现大直径压电换能器的高预紧力装配,开展了大直径压电换能器结构设计、装配方法设计和径向应力均匀化研究。首先,基于传输线方法和模态分析开展压电换能器设计,采用Morris方法进行了尺寸参数对压电换能器纵振频率、振幅比和节面位置偏差的灵敏度分析,并设计了预期性能的压电换能器；然后,根据压电换能器对预应力控制的需求,提出了一种液压拉伸式装配方法；针对拉伸装配过程中压电陶瓷组的径向应力分布不均匀问题,对拉伸装配过程中的2个关键状态进行了静应力分析,以指导压电换能器的结构改进设计；最后,设计了拉伸装配装置,并基于该装置完成了压电换能器装配试验。试验结果验证了所提拉伸式装配方法可实现预期性能的压电换能器装配。压电换能器装配后的串联谐振频率和并联谐振频率分别稳定在18.05 kHz和19.57 kHz附近,串联谐振阻抗在10 Ω以内,机电耦合系数在0.34~0.36之间。研究结果为控制压电换能器装配预应力提出了新的解决思路,并为大直径压电换能器设计时如何均化陶瓷应力状况提供了解决方法。 |
| 关键词: 压电换能器 结构设计 拉伸装配 灵敏度分析 静应力分析 |
| DOI：10.11918/202205105 |
| 分类号:TB552 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(9,2, 52111530038) |
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| Structure design and tensile assembly method of a piezoelectric transducer |
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SUN Xinqing,QUAN Qiquan,TANG Dewei,DENG Zongquan
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(State Key Laboratory of Robotics and System (Harbin Institute of Technology), Harbin 150001, China)
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| Abstract: |
| The prestress of piezoelectric transducer assembly directly affects the product performance. The large-diameter piezoelectric transducer has higher requirements for prestress control and stress distribution uniformity of piezoelectric ceramics. For the high pre-tightening force assembly of large-diameter piezoelectric transducer, the structure design, assembly method design, and radial stress homogenization of large-diameter piezoelectric transducer were studied. First, a piezoelectric transducer was designed based on the transmission line method and modal analysis. The Morris method was used to analyze the sensitivity of size parameters to the longitudinal vibration frequency, amplitude ratio, and pitch position deviation of the piezoelectric transducer, and piezoelectric transducer with expected performance was designed. Then, a hydraulic tension assembly method was proposed to realize high pre-tightening force assembly of piezoelectric transducer. In order to address the issue of uneven radial stress distribution of piezoelectric ceramics in the process of tensile assembly, the static stress of two key states was analyzed. Finally, a tensile assembly device was designed, and the assembly test of piezoelectric transducer was completed using the device. Results showed that the tensile assembly method could realize the expected performance of piezoelectric transducer assembly. After assembly, the series resonant frequency and parallel resonant frequency of the piezoelectric transducer were stable at 18.05 kHz and 19.57 kHz, the series resonant impedance was within 10 Ω, and the electromechanical coupling coefficient was between 0.34 and 0.36. The research results provide a new method for controlling the prestress of piezoelectric transducer assembly, and offer a solution for the design of large-diameter piezoelectric transducers with uniform ceramic stress. |
| Key words: piezoelectric transducer structure design tensile assembly sensitivity analysis static stress analysis |
