In order to solve the problems of frequency shift, efficiency decline and life shortening caused by temperature rise in the working process of high-power ultrasonic transducer, the technology of heat pipe is employed for enhancing heat dissipation of the ultrasonic transducer. A new type of high-power transducer with heat pipe heat dissipation (HPUT) is proposed in this study. The heat pipe radiator adopts the form of a copper–water-composite wick, and installs straight fins on the condensation section to enhance heat dissipation. Six heat pipe radiators are embedded in the front cover plate of the transducer close to the piezoelectric ceramic and evenly arranged along the circumference of the transducer. The vibration characteristics, radiated sound field characteristics and heat dissipation characteristics of the HPUT are compared with those of traditional Langevin ultrasonic transducer (TLUT) through simulations and experiments. Results manifest that compared with the TLUT, the HPUT has much lower operation temperature (reduced by 60% in this study), much smaller resonant frequency shift (reduced by 75% in this study) and the higher vibration amplitude (increased by 25% in this study). This study will contribute to the development of high-power ultrasonic transducer which has potential application value in many industrial fields.

为解决大功率超声换能器工作过程中因温升引起的频移、效率下降和寿命缩短等问题，采用热管技术加强超声换能器的散热。本研究提出了一种新型的带有热管散热（HPUT）的大功率换能器。热管散热器采用铜水复合灯芯形式，在冷凝段安装直翅片加强散热。六个热管散热器嵌入在靠近压电陶瓷的换能器前盖板中，沿换能器圆周均匀排列。振动特性，通过仿真和实验，将HPUT的辐射声场特性和散热特性与传统的朗之万超声换能器（TLUT）进行了比较。结果表明，与 TLUT 相比，HPUT 的工作温度低得多（本研究降低了 60%），谐振频移小得多（本研究降低了 75%），振动幅度更高（本研究增加了 25%）。这项研究）。该研究将有助于大功率超声换能器的开发，该换能器在许多工业领域具有潜在的应用价值。更小的共振频率偏移（在本研究中减少了 75%）和更高的振动幅度（在本研究中增加了 25%）。该研究将有助于大功率超声换能器的开发，该换能器在许多工业领域具有潜在的应用价值。更小的共振频率偏移（在本研究中减少了 75%）和更高的振动幅度（在本研究中增加了 25%）。该研究将有助于大功率超声换能器的开发，该换能器在许多工业领域具有潜在的应用价值。