Pulsating heat pipe heat dissipating type high-power ultrasonic transducer

Abstract

The invention discloses a pulsating heat pipe heat dissipating type high-power ultrasonic transducer and relates to the technical field of ultrasonic transducers. The pulsating heat pipe heat dissipating type high-power ultrasonic transducer comprises a piezoelectric ultrasonic transducer and a pulsating heat pipe heat dissipating device. The piezoelectric ultrasonic transducer comprises a stressbolt, a rear cover plate, piezoelectric ceramic elements and a front cover plate, wherein a series of holes are formed along the radial direction of the front cover plate. The rear cover plate is cylindrical, and the front cover plate is conical. The front cover plate, the piezoelectric ceramic elements and the rear cover plate are closely connected through the stress bolt. The pulsating heat pipeheat dissipating device is organically coupled inside the piezoelectric ultrasonic transducer. On the premise that the performance of the transducer is not influenced, based on the mechanical structure of a traditional piezoelectric ultrasonic transducer, the pulsating heat pipe heat dissipating type high-power ultrasonic transducer is formed through organic coupling with pulsating heat pipes. The efficient heat-transferring characteristic of the pulsating heat pipes is utilized to take away heat generated inside the high-power piezoelectric ultrasonic transducer when the high-power piezoelectric ultrasonic transducer works; it is guaranteed that the transducer runs efficiently and safely within a normal-temperature range; and in addition, the service life of the piezoelectric ultrasonictransducer can be prolonged.

Description

technical field [0001] The invention relates to the technical field of ultrasonic transducers, in particular to a pulsating heat pipe cooling type high-power ultrasonic transducer. Background technique [0002] In the application of power ultrasonic technology, the stability of the working performance of the transducer is very important and has always been highly valued by the industry. The piezoelectric ultrasonic transducer is the core device for energy conversion in the ultrasonic vibration system, and the temperature has a significant impact on its performance. Due to the power loss caused by the impedance mismatch between the transducer and the power supply under high-power working conditions and the dielectric loss of the piezoelectric ceramic itself, heat is generated, and because the piezoelectric ceramic is an insulating material, its thermal conductivity is poor. The temperature rise in the center of the piezoelectric ultrasonic transducer is serious. If the tempe...

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Problems solved by technology

The cooling system adopts the principle of vapor compression refrigeration. Through the process of compression, condensation, throttling and evaporation of the refrigerant, a refrigeration cycle is formed. The refrigerant continuously takes away the heat of the ultrasonic transducer. The cooling system is relatively complicated and requires additional power equipment. The investment cost is increased, which is not conducive to practical application and promotion; the application number is CN201110226180.1, and the Chinese invention patent titled "High Power Ultrasonic Transducer with Heat Pipe Cooling Device" discloses an ultrasonic transducer cooled by heat pipes , the cooling scheme adopts the method of bonding the heat pipe and the outside of the transducer to control the working temperature so that the ultrasonic transducer can work efficiently

However, due to the limitations of this type of heat pipe, it is necessary to use gravity to realize the reflux of the heat pipe working medium, so that the working posture of the ultrasonic transducer is limited; the application number is CN200620133985.6, and the name of the Chinese utility A new type of patent discloses a multi-vibrator ultrasonic transducer arranged in an array. The transducer uses a "T"-shaped tube to realize the cooling of each vibrator by multiple gases to achieve the effect of rapid cooling, but the gas The cooling method has a small heat transfer area, so it cannot meet the high-density and stable heat dissipation requirements of the transducer

The above several schemes realize external heat dissipation for the piezoelectric ultrasonic transducer. Although the external temperature of the transducer can be effectively reduced, the internal temperature is still high, and there is a large temperature gradient inside and outside the piezoelectric ultrasonic transducer. Its performance is still greatly affected by

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