Multi-stage frequency ultrasonic vibration pulsating heat pipe device and operation process thereof

A pulsating heat pipe and ultrasonic vibration technology, applied in heat transfer modification, indirect heat exchanger, heat exchange equipment, etc., can solve problems such as affecting the accuracy of temperature measurement and cannot be used under ultrasonic conditions, and achieve the true frequency and amplitude Controllable, simple structure, easy to install

Active Publication Date: 2022-08-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method cannot be used under ultrasonic conditions
Ultrasonic vibration causes friction between the thermocouple and the outer wall surface, which affects the accuracy of temperature measurement

Method used

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  • Multi-stage frequency ultrasonic vibration pulsating heat pipe device and operation process thereof
  • Multi-stage frequency ultrasonic vibration pulsating heat pipe device and operation process thereof
  • Multi-stage frequency ultrasonic vibration pulsating heat pipe device and operation process thereof

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Embodiment 1

[0044] figure 1 It is a schematic diagram of the overall structure of the multi-stage frequency ultrasonic vibration pulsating heat pipe device according to the present invention, figure 2 It is an exploded diagram of the structure. refer to figure 1 , 2 As shown, a multi-stage frequency ultrasonic vibration pulsating heat pipe device includes a pulsating heat pipe 1 , a secondary ultrasonic vibrator 2 , a support frame 3 and an ultrasonic power source 6 in order from top to bottom. The secondary ultrasonic vibrator includes a primary ultrasonic vibrator 4 and an ultrasonic assembly 5, which are fixed on the support frame by means of a flange arranged at a half-wavelength node position, and the ultrasonic power source can be connected to the primary ultrasonic vibrator 4 or the secondary ultrasonic vibrator 2. Select the operating frequency.

[0045] image 3 is a schematic diagram of the structure of the first-stage ultrasonic vibrator 4, Figure 4 for image 3 Schem...

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PUM

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Abstract

The invention relates to a multistage frequency ultrasonic vibration pulsating heat pipe device and an operation process thereof, the device is mainly composed of a pulsating heat pipe, a secondary ultrasonic vibrator and a support frame part, the pulsating heat pipe is installed on the secondary ultrasonic vibrator, and the secondary ultrasonic vibrator is fixed on a support frame; the second-stage ultrasonic vibrator mainly comprises a first-stage ultrasonic vibrator and an ultrasonic assembly, and the overall structure size meets the full-wavelength resonance design requirement. The first-stage ultrasonic vibrator and the ultrasonic assembly are both provided with ultrasonic piezoelectric ceramic transducers, but the resonant frequencies of the first-stage ultrasonic vibrator and the ultrasonic assembly are different. The overall length of the first-stage ultrasonic vibrator meets the half-wavelength resonance design principle. The evaporation end of the pulsating heat pipe is provided with a base and is connected with the ultrasonic vibrator through a double-end stud. According to the device, the frequency change of the ultrasonic vibration device can be adjusted, stable work of the pulsating heat pipe under the multi-stage frequency ultrasonic condition is achieved, and the matching performance of the ultrasonic transmission direction and the flow direction of a working medium in the pulsating heat pipe is guaranteed.

Description

technical field [0001] The invention relates to a multi-stage frequency ultrasonic vibration pulsating heat pipe device and its operation process. The device can realize stable and reliable loading and transmission of the ultrasonic energy field of multi-level frequency on the pulsating heat pipe, and provide an experimental basis for the application of the pulsating heat pipe in the field of ultrasonic vibration processing. Background technique [0002] As a passive heat transfer element, the pulsating heat pipe has the characteristics of simple structure and high heat transfer capacity. It has been used in machining such as turning and grinding to reduce the processing temperature and slow down tool grinding. Therefore, pulsating heat pipes also have broad application prospects in ultrasonic machining. To explore the effect of ultrasound on the heat transfer performance of pulsating heat pipes, it is first necessary to solve how to achieve stable and reliable loading and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/06F28F13/10
CPCF28D15/06F28F13/10
Inventor 钱宁姜帆傅玉灿张靖周徐九华赵彪丁文锋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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