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Analysis on Flow Field of the Valveless Piezoelectric Pump with Two Inlets and One Outlet and a Rotating Unsymmetrical Slopes Element 被引量:13
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作者 XIA Qixiao ZHANG Jianhui +1 位作者 LEI Hong CHENG Wei 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2012年第3期474-483,共10页
Typically,liquid pump and liquids mixer are two separate devices.The invention of piezoelectric pump makes it possible to integrate the two devices.Hower,the existing piezoelectric mixing-pumps are larger because the ... Typically,liquid pump and liquids mixer are two separate devices.The invention of piezoelectric pump makes it possible to integrate the two devices.Hower,the existing piezoelectric mixing-pumps are larger because the need the space outside the chamber,and another shortcome of them is that they cannot adjust the mixing ratio of two liquids.In this paper,a new piezoelectric pump being capable of integrating mixer and pump is presented,based on the theory of the piezoelectric pump with the unsymmetrical slopes element(USE).Besides the features of two inlets and one outlet,the piezoelectric pump has a rotatable unsymmetrical slopes element(RUSE).When the pump works,two fluids flow into the inlet channels respectively.Then the RUSE controls the ratio of the two flows by adjusting the flow resistances of the two inlet channels.The fluids form a net flow due to the USE principle,while they are mixed into a homogeneous solution due to strong turbulence flow field and complex vortices generated by RUSE in the chamber.And then the solution flows through the outlet.Firstly,the theoretical analysis on this pump is performed.Meanwhile,the flow field in the chamber is calculated and simulated.And then,the relationship between the flows of the two channels and the rotating angle of the RUSE is set up and analyzed.Finally,experiment with the proposed pump is carried out to verify the numerical results.A RUSE with 20° slope angle is used in the experiment.Four sets of data are tested with the RUSE at the rotating angles of 0°,6°,11°,and 16°,respectively,corresponding to the numerical models.The experimental results show that the empirical data and the theoretical data share the same trend.The maximum error between the theoretical flow and the experimental flow is 11.14%,and the maximum error between the theoretical flow ratio of the two inlets and the experimental one is 2.5%.The experiment verified the theoretical analysis.The proposed research provides a new idea for integration of micro liquids mixer and micro liquids pump. 展开更多
关键词 piezoelectric PUMP valveless rotatable unsymmetrical slopes element
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Advances in Valveless Piezoelectric Pump with Cone-shaped Tubes 被引量:12
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作者 Jian-Hui Zhang Ying Wang Jun Huang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第4期766-781,共16页
This paper reviews the development of valve- less piezoelectric pump with cone-shaped tube chrono- logically, which have widely potential application in biomedicine and micro-electro-mechanical systems because of its ... This paper reviews the development of valve- less piezoelectric pump with cone-shaped tube chrono- logically, which have widely potential application in biomedicine and micro-electro-mechanical systems because of its novel principles and deduces the research direction in the future. Firstly, the history of valveless piezoelectric pumps with cone-shaped tubes is reviewed and these pumps are classified into the following types: single pump with solid structure or plane structure, and combined pump with parallel structure or series structure. Furthermore, the function of each type of cone-shaped tubes and pump structures are analyzed, and new direc- tions of potential expansion of valveless piezoelectric pumps with cone-shaped tubes are summarized and deduced. The historical argument, which is provided by the literatures, that for a valveless piezoelectric pump with cone-shaped tubes, cone angle determines the flow resistance and the flow resistance determines the flow direction. The argument is discussed in the reviewed pumps one by one, and proved to be convincing. Finally, it is deduced that bionics is pivotal in the development of valveless piezoelectric pump with cone-shaped tubes fromthe perspective of evolution of biological structure. This paper summarizes the current valveless piezoelectric pumps with cone-shaped tubes and points out the future development, which may provide guidance for the research of piezoelectric actuators. 展开更多
关键词 piezoelectric pump valveless Cone-shapedtube BIONICS
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Theory and Experimental Verification on Valveless Piezoelectric Pump with Multistage Y-shape Treelike Bifurcate Tubes 被引量:6
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作者 HUANG Jun ZHANG Jianhui +1 位作者 XUN Xianchao WANG Shouyin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2013年第3期462-468,共7页
Among most traditional piezo water cooling systems, piezoelectric valve pumps are adopted as their driving sources. The valves in these pumps induce problems of shock and vibration and also make their structure compli... Among most traditional piezo water cooling systems, piezoelectric valve pumps are adopted as their driving sources. The valves in these pumps induce problems of shock and vibration and also make their structure complicated, which is uneasy to minimize and reduce their reliability and applicability of the whole system. In order to avoid these problems caused by valve structure, a novel valveless piezoelectric pump is developed, which integrates both functions of transforming and cooling. The pump’s Y-shape tree-like construction not only increases the efficiency of cooling but also the system reliability and applicability. Firstly, a multistage Y-shape treelike bifurcate tube is proposed, then a valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes is designed and its working principle is analyzed. Then, the theoretical analysis of flow resistance characteristics and the flow rate of the valveless piezoelectric pump are performed. Meanwhile, commercial software CFX is employed to perform the numerical simulation for the pump. Finally, this valveless piezoelectric pump is fabricated, the relationship between the flow rates and driving frequency, as well as the relationship between the back pressure and the driving frequency are experimentally investigated. The experimental results show that the maximum flow rate is 35.6 mL/min under 100 V peak-to-peak voltage (10.3 Hz) power supply, and the maximum back pressure is 55 mm H2O under 100 V (9 Hz) power supply, which validates the feasibility of the valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes. The proposed research provides certain references for the design of valveless piezoelectric pump and improves the reliability of piezo water cooling systems. 展开更多
关键词 piezoelectric PUMP valveless Y-shape tube treelike bifurcate
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Analysis of the Flow Rate Characteristics of Valveless Piezoelectric Pump with Fractal-like Y-shape Branching Tubes 被引量:7
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作者 HUANG Jun ZHANG Jianhui +1 位作者 WANG Shouyin LIU Weidong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第3期628-634,共7页
Microchannel heat sink with high heat transfer coefficients has been extensively investigated due to its wide application prospective in electronic cooling. However, this cooling system requires a separate pump to dri... Microchannel heat sink with high heat transfer coefficients has been extensively investigated due to its wide application prospective in electronic cooling. However, this cooling system requires a separate pump to drive the fluid transfer, which is uneasy to minimize and reduces their reliability and applicability of the whole system. In order to avoid these problems, valveless piezoelectric pump with fractal-like Y-shape branching tubes is proposed. Fractal-like Y-shape branching tube used in microchannel heat sinks is exploited as no-moving-part valve of the valveless piezoelectric pump. In order to obtain flow characteristics of the pump, the relationship between tube structure and flow rate of the pump is studied. Specifically, the flow resistances of fractal-like Y-shape branching tubes and flow rate of the pump are analyzed by using fractal theory. Then, finite element software is employed to simulate the flow field of the tube, and the relationships between pressure drop and flow rate along merging and dividing flows are obtained. Finally, valveless piezoelectric pumps with fractal-like Y-shape branching tubes with different fractal dimensions of diameter distribution are fabricated, and flow rate experiment is conducted. The experimental results show that the flow rate of the pump increases with the rise of fractal dimension of the tube diameter. When fractal dimension is 3, the maximum flow rate of the valveless pump is 29.16 mL/min under 100 V peak to peak (13 Hz) power supply, which reveals the relationship between flow rate and fractal dimensions of tube diameter distribution. This paper investigates the flow characteristics of valveless piezoelectric pump with fractal-like Y-shape branching tubes, which provides certain references for valveless piezoelectric pump with fractal-like Y-shape branching tubes in application on electronic chip cooling. 展开更多
关键词 piezoelectric PUMP valveless fractal-like Y-shape branching tube
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Simulation Analysis and Experimental Verification of Spiral-tube-type Valveless Piezoelectric Pump with Gyroscopic Effect 被引量:5
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作者 LENG Xuefei ZHANG Jianhui +2 位作者 JIANG Yan WANG Shouyin ZHAO Chunsheng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第4期822-829,共8页
The current research of the valveless piezoelectric pump focuses on increasing the flow rate and pressure differential. Compared with the valve piezoelectric pump, the valveless one has excellent performances in simpl... The current research of the valveless piezoelectric pump focuses on increasing the flow rate and pressure differential. Compared with the valve piezoelectric pump, the valveless one has excellent performances in simple structure, low cost, and easy miniaturization. So, their important development trend is the mitigation of their weakness, and the multi-function integration. The flow in a spiral tube element is sensitive to the element attitude caused by the Coriolis force, and that a valveless piezoelectric pump is designed by applying this phenomenon. The pump has gyroscopic effect, and has both the actuator function of fluid transfer and the sensor function, which can obtain the angular velocity when its attitude changes. First, the present paper analyzes the flow characteristics in the tube, obtains the calculation formula for the pump flow, and identifies the relationship between pump attitude and flow, which clarifies the impact of flow and driving voltage, frequency, spiral line type and element attitude, and verifies the gyroscopic effect of the pump. Then, the finite element simulation is used to verify the theory. Finally, a pump is fabricated for experimental testing of the relationship between pump attitude and pressure differential. Experimental results show that when Archimedes spiral θ=4π is selected for the tube design, and the rotation speed of the plate is 70 r/min, the pressure differential is 88.2 Pa, which is 1.5 times that of 0 r/min rotation speed. The spiral-tube-type valveless piezoelectric pump proposed can turn the element attitude into a form of pressure output, which is important for the multi-function integration of the valveless piezoelectric pump and for the development of civil gyroscope in the future. 展开更多
关键词 GYROSCOPE valveless piezoelectric pump spiral tube
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3D FEM Analyses on Flow Field Characteristics of the Valveless Piezoelectric Pump 被引量:5
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作者 HUANG Jun ZHANG Jianhui +1 位作者 SHI Weidong WANG Yuan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2016年第4期825-831,共7页
Due to the special transportation and heat transfer characteristics,the fractal-like Y-shape branching tube is used in valveless piezoelectric pumps as a no-moving-part valve.However,there have been little analyses on... Due to the special transportation and heat transfer characteristics,the fractal-like Y-shape branching tube is used in valveless piezoelectric pumps as a no-moving-part valve.However,there have been little analyses on the flow resistance of the valveless piezoelectric pump,which is critical to the performance of the valveless piezoelectric pump with fractal-like Y-shape branching tubes.Flow field of the piezoelectric pump is analyzed by the finite element method,and the pattern of the velocity streamlines is revealed,which can well explain the difference of total flow resistances of the piezoelectric pump.Besides,simplified numerical method is employed to calculate the export flow rate of piezoelectric pump,and the flow field of the piezoelectric pump is presented.The FEM computation shows that the maximum flow rate is 16.4 m L/min.Compared with experimental result,the difference between them is just 55.5%,which verifies the FEM method.The reasons of the difference between dividing and merging flow resistance of the valveless piezoelectric pump with fractal-like Y-shape branching tubes are also investigated in this method.The proposed research provides the instruction to design of novel piezoelectric pump and a rapid method to analyse the pump flow rate. 展开更多
关键词 piezoelectric pump valveless fractal-like Y-shape branching tube FEM
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Theoretical Analysis and Experimental Verification on Flow Field of Piezoelectric Pump with Unsymmetrical Slopes Element 被引量:18
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作者 XIA Qixiao ZHANG Jianhui +1 位作者 LEI Hong CHENG Wei 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2009年第5期735-744,共10页
Regular valveless piezoelectric pumps have rectifying elements outside their chambers to produce net flow. These rectifying elements outside the chamber will increase the overall volume of the pump and prevent its min... Regular valveless piezoelectric pumps have rectifying elements outside their chambers to produce net flow. These rectifying elements outside the chamber will increase the overall volume of the pump and prevent its minimization. Valveless piezoelectric pump with unsymmetrical slopes elements(USE), proposed in this paper, differs from other valveless pumps in that it is easy to be minimized by developing the chamber bottom as such a rectifying element. In this research, the working principle of the proposed pump was analyzed first. Numerical models were thereby established and numerical simulation was conducted to the chamber flow field with the method of time-dependent velocity. The effects of the USEs on the flow field in the chamber were shown clearly in simulation. And the particular feature of flow field in the chamber was discovered. It behaves a complex flow field, in which strong turbulent occurs companying a lot of vortexes in different directions and different sizes. This feature is just opposite to what regular piezoelectric pumps expect: a moderate flow field. The turbulent flow could be used to have different liquids stirred and well mixed in the chamber to produce homogeneous solution, emulsion or turbid liquid. Meanwhile, numerical simulation also presents the effect of the angles difference of the two slopes upon the flow field, and upon the flow rate of the pump, which fits to the theoretical analysis. Experiments with the proposed pump were also conducted to verify the numerical results. In these experiments, six USEs with different slope angles were used for efficiency tests, which proved the validity and reliability of the numerical analysis. The data obtained from numerical analysis agree well with that from the experiments. The errors ranged from 4.4% to 14.8% with their weighted average error being 9.7%. 展开更多
关键词 piezoelectric valveless PUMP Flow field Unsymmetrical slopes element
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Multi-Field Analysis and Experimental Verification on Piezoelectric Valve-Less Pumps Actuated by Centrifugal Force 被引量:1
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作者 Yu-Ting Ma Zhi-Guo Pei Zhong-Xiang Chen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第4期1032-1043,共12页
A piezoelectric centrifugal pump was developed previously to overcome the low frequency responses of piezoelectric pumps with check valves and liquid reflux of conventional valveless piezoelectric pumps. However, the ... A piezoelectric centrifugal pump was developed previously to overcome the low frequency responses of piezoelectric pumps with check valves and liquid reflux of conventional valveless piezoelectric pumps. However, the electro-mechanical-fluidic analysis on this pump has not been done. Therefore, multi-field analysis and experimen- tal verification on piezoelectrically actuated centrifugal valveless pumps are conducted for liquid transport appli- cations. The valveless pump consists of two piezoelectric sheets and a metal tube with piezoelectric elements pushing the metal tube to swing at the first bending resonant fre- quency. The centrifugal force generated by the swinging motion will force the liquid out of the metal tube. The governing equations for the solid and fluid domains are established, and the coupling relations of the mechanical, electrical and fluid fields are described. The bending res- onant frequency and bending mode in solid domain are discussed, and the liquid flow rate, velocity profile, and gauge pressure are investigated in fluid domain. The working frequency and flow rate concerning different components sizes are analyzed and verified through experiments to guide the pump design. A fabricated pro- totype with an outer diameter of 2.2 mm and a length of 80 mm produced the largest flow rate of 13.8 mL/min at backpressure of 0.8 kPa with driving voltage of 80 Vpp. Bysolving the electro-mechanical-fluidic coupling problem, the model developed can provide theoretical guidance on the optimization of centrifugal valveless pump characters. 展开更多
关键词 valveless pump Centrifugal force piezoelectric pump Multi-field analysis
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Design and Experiment of Streamlined Piezoelectric Pump with Low Vortex and Large Flow Rate 被引量:1
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作者 BIAN Kan HUANG Zhi +4 位作者 BAO Qibo ZHANG Jianhui LAI Liyi CHEN Xiaosheng CHEN Zhenlin 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第1期155-163,共9页
Valveless piezoelectric pump is widely used in the medical,however,there is a general and difficult problem to be solved:Low vortex and large flow rate are not compatible,resulting in the blood prone to thrombosis dur... Valveless piezoelectric pump is widely used in the medical,however,there is a general and difficult problem to be solved:Low vortex and large flow rate are not compatible,resulting in the blood prone to thrombosis during blood delivery.In this paper,a new valveless piezoelectric(PZT)pump with streamlined flow tubes(streamlined pump)is proposed.The design method and the working principle of the pump are analyzed.The velocity streamlines are simulated,and the results demonstrate that there are no obvious vortexes in the flow tube of the streamlined pump.Five prototype pumps(two cone pumps and three streamlined pumps)are designed and fabricated to perform flow rate and flow resistance experiments.The experimental results illustrate that the maximum flow rate of the streamlined pump is 142 mL/min,which is 179%higher than that of the cone piezoelectric pump,demonstrating that the streamlined pump has a large flow rate performance.This research provides an inspiration for future research on simple structure,low vortex and large flow rate volume-type pumps,and also provides a useful solution for thrombosis preventing. 展开更多
关键词 valveless piezoelectric pump streamlined low vortex high flow rate THROMBOSIS
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箭头型阻流体无阀压电泵的设计与试验
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作者 严天祥 王俊贤 +2 位作者 屈俊辰 陈虎城 秦建华 《现代制造工程》 CSCD 北大核心 2024年第4期7-12,共6页
针对三棱柱阻流体无阀压电泵输出流量小的问题,基于箭头结构流阻小的特点设计了一种箭头型阻流体无阀压电泵,介绍了该泵的结构及工作原理。利用有限元软件模拟仿真了箭头型阻流体无阀压电泵的泵腔速度流线图,并将该泵与三棱柱阻流体无... 针对三棱柱阻流体无阀压电泵输出流量小的问题,基于箭头结构流阻小的特点设计了一种箭头型阻流体无阀压电泵,介绍了该泵的结构及工作原理。利用有限元软件模拟仿真了箭头型阻流体无阀压电泵的泵腔速度流线图,并将该泵与三棱柱阻流体无阀压电泵的阻力特性进行了对比分析。结果表明,箭头型阻流体无阀压电泵能单向运输流体,且其效率较三棱柱阻流体无阀压电泵提升了19.51%。利用3D打印机制作了2种泵的样机,进行了流量和压差试验。试验结果表明,在300 V的驱动电压下,箭头型阻流体无阀压电泵的最大流量和压差分别为17.40 g/min和470 Pa,较三棱柱阻流体无阀压电泵分别提升了22.71%和37.03%。 展开更多
关键词 箭头 无阀压电泵 三棱柱 流量 压差
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锥形阶梯流管无阀压电泵仿真及实验
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作者 孙业明 李驹 +2 位作者 苏天一 王俊尧 李瑞鹏 《振动.测试与诊断》 EI CSCD 北大核心 2024年第3期602-607,626,共7页
针对锥形流管无阀压电泵输出流量小、回流流量多等问题,结合锥形流管和溢流坝阶梯式结构的阻流作用,研制了一种锥形阶梯流管无阀压电泵。对锥形阶梯流管的流阻特性进行了理论分析,利用有限元软件对锥形阶梯流管无阀压电泵和锥形无阶梯... 针对锥形流管无阀压电泵输出流量小、回流流量多等问题,结合锥形流管和溢流坝阶梯式结构的阻流作用,研制了一种锥形阶梯流管无阀压电泵。对锥形阶梯流管的流阻特性进行了理论分析,利用有限元软件对锥形阶梯流管无阀压电泵和锥形无阶梯无阀压电泵进行了流场仿真对比,制作了锥形阶梯流管无阀压电泵实验样机,测量不同频率和驱动电压下两种泵的流量。实验结果表明:当驱动电压峰峰值为180 V、驱动频率为18 Hz时,锥形无阶梯流管无阀压电泵流量最大为6.20 ml/min,锥形阶梯流管无阀压电泵输出流量最大为8.04 ml/min,与锥形无阶梯流管无阀压电泵相比泵最大输出流量提升了29%,验证了锥形阶梯流管无阀压电泵能有效抑制锥形流管中的回流现象,且相比于无阶梯流管无阀压电泵具有更好的输出流量。 展开更多
关键词 无阀压电泵 锥形阶梯流管 有限元仿真 流量实验
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半圆柱阻流体锥形腔无阀压电泵
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作者 严天祥 龙志文 +2 位作者 李成其 陈虎城 秦建华 《压电与声光》 CAS 北大核心 2023年第6期839-844,共6页
为了提高半圆柱阻流体无阀压电泵的流量,结合锥形腔的流阻不等特性,该文设计了一种半圆柱阻流体锥形腔无阀压电泵,并建立了其流量的理论公式。数值模拟了该泵的泵腔流速分布,对比分析了其与半圆柱阻流体无阀压电泵的阻力特性。模拟结果... 为了提高半圆柱阻流体无阀压电泵的流量,结合锥形腔的流阻不等特性,该文设计了一种半圆柱阻流体锥形腔无阀压电泵,并建立了其流量的理论公式。数值模拟了该泵的泵腔流速分布,对比分析了其与半圆柱阻流体无阀压电泵的阻力特性。模拟结果表明,半圆柱阻流体锥形腔无阀压电泵能实现流体的单向输送,且其输送能力优于半圆柱阻流体无阀压电泵。制作了两种泵的样机并进行了流量和压力差试验。试验结果表明,在驱动电压220 V下,半圆柱阻流体锥形腔无阀压电泵的最高流量和压力差分别为30.96 g/min和394 Pa,与半圆柱阻流体无阀压电泵相比,其流量和压力差均得到提高。 展开更多
关键词 半圆柱 锥形腔 无阀压电泵 流量 压力差
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Dynamics analysis and experiment on the fishtailing type of valveless piezoelectric pump with rectangular vibrator 被引量:10
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作者 HUANG Yi1, ZHANG JianHui1, HU XiaoQi1, XIA QiXiao2, HUANG WeiQing1 & ZHAO ChunSheng1 1 Department of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2 Department of Mechanical and Electrical Engineering, Beijing Union University, Beijing 100020, China 《Science China(Technological Sciences)》 SCIE EI CAS 2010年第12期3241-3247,共7页
In recent years, the research and development of piezoelectric pumps have become an increasingly popular topic. Minimization, structure simplification and stronger output become the focus of piezoelectric pumps’ rese... In recent years, the research and development of piezoelectric pumps have become an increasingly popular topic. Minimization, structure simplification and stronger output become the focus of piezoelectric pumps’ research due to its possible application in MEMS technology. The valveless fishtailing piezoelectric pump, neither a volumetric nor a rotating pump, was invented according to the bionics of fish swimming. With assumption that the head of the fish is fixed while its tail is swinging, fluid would flow toward the end of the tail, achieving the function of a valveless pump. This type of pumps creates a new branch for the piezoelectric pump research, which is proposed for the first time in this paper. The relationship between the flow rates and vibrating frequencies was derived from the interaction between the vibrator and fluid. Numerical simulations with FEM software were conducted to study the first and second vibration modes of the piezoelectric vibrator. The results showed that the maximum amplitude of the vibrator was 0.9 mm at the frequency of 76 Hz for the first vibration mode, while the maximum amplitude of the vibrator was 0.22 mm at the frequency of 781 Hz for the second vibration mode. Experiments were conducted with the Doppler laser vibration measurement system, and the results were compared to those of the FEM simulation. It was shown that in the first vibration mode the piezoelectric vibrator reached its maximum amplitude of about 0.9 mm at the driving frequency of 49 Hz, which gives the flow rate of 2.0 mL/min, in the second vibration mode, the maximum amplitude was about 0.25 mm at the frequency of 460 Hz with the flow rate being 6.4 mL/min. 展开更多
关键词 piezoelectric PUMP valveless fishtailing RECTANGULAR VIBRATOR DYNAMICS analysis EXPERIMENT
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Theory and experimental verification of valveless piezoelectric pump with rotatable unsymmetrical slopes 被引量:8
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作者 ZHANG JianHui XIA QiXiao +3 位作者 HUANG Yi LENG XueFei HUANG Jun ZHAO ChunSheng 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第11期3070-3077,共8页
A valveless piezoelectric pump with rotatable unsymmetrical slopes is developed in this research.It has the following features:The pump integrates driving and transporting,and it can mix different fluids while transpo... A valveless piezoelectric pump with rotatable unsymmetrical slopes is developed in this research.It has the following features:The pump integrates driving and transporting,and it can mix different fluids while transporting them.In this paper,firstly,the design of the valveless piezoelectric pump with rotatable unsymmetrical slopes was proposed,and the single-direction flow principle was explained.Then,the fluid mechanics model of the valveless piezoelectric pump with rotatable unsymmetrical slopes was established.Meanwhile,the numerical simulation of the pump was performed.Finally,the experiments on relationship between the rotation angles of the slope and the flow rates were conducted.The experimental results showed that the maximum flow was 32.32 mL min 1.The maximum relative error between the theoretical results and the experimental ones was 14.59%.For the relationship between rotation angles and flow ratio of two inlets,the relative error between the experimental and theoretical maxima was 3.75%.Thus,the experiments proved the feasibility of the pump design and verified the theory. 展开更多
关键词 piezoelectric PUMP valveless rotatable unsymmetrical slope
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A spiral-tube-type valveless piezoelectric pump with gyroscopic effect 被引量:4
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作者 Jianhui Zhang Xuefei Leng Chunsheng Zhao 《Chinese Science Bulletin》 SCIE EI CAS 2014年第16期1885-1889,共5页
The valveless piezoelectric pump integrates driving and transmitting into one operating element,and characterizes easy micro-miniaturization.But,there is the original sin of low pressure and low flow.Thus,it must avoi... The valveless piezoelectric pump integrates driving and transmitting into one operating element,and characterizes easy micro-miniaturization.But,there is the original sin of low pressure and low flow.Thus,it must avoid weakness to choose applications field.This paper analyzes the flow characteristics in the rotary spiral-tube,which will cause the Coriolis force,and subsequently influence the fluid moving.The principle of the pump is deduced,and the spiral-tube-type valveless piezoelectric pump is invented.The angular velocity variation can be obtained when the pump attitude changes,which theoretically verifies the gyroscopic effect of the pump.A pump is fabricated for experimental testing.Experiments has shown that when Archimedes spiral h?4p is selected for the tube design,and the rotation speed of the plate is 70 r/min,the pressure differential is 9 mm H2O,which is 1.5 times that of 0 r/min rotation speed.If introduced the low-cost and miniaturized gyroscope,then this may promise potential application in these areas such as smart cars,robots,and home health care. 展开更多
关键词 无阀压电泵 陀螺效应 管型 螺旋型 阿基米德螺旋线 旋转速度 实验测试 科里奥利力
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A valveless piezoelectric pump with novel flow path design of function of rectification to improve energy efficiency
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作者 Jianhui ZHANG Xiaosheng CHEN +5 位作者 Zhenlin CHEN Jietao DAI Fan ZHANG Mingdong MA Yuxuan HUO Zhenzhen GUI 《Frontiers of Mechanical Engineering》 SCIE CSCD 2022年第3期177-193,共17页
Existing valveless piezoelectric pumps are mostly based on the flow resistance mechanism to generate unidirectional fluid pumping,resulting in inefficient energy conversion because the majority of mechanical energy is... Existing valveless piezoelectric pumps are mostly based on the flow resistance mechanism to generate unidirectional fluid pumping,resulting in inefficient energy conversion because the majority of mechanical energy is consumed in terms of parasitic loss.In this paper,a novel tube structure composed of a Y-shaped tube and aȹ-shaped tube was proposed considering theory of jet inertia and vortex dissipation for the first time to improve energy efficiency.After verifying its feasibility through the flow field simulation,the proposed tubes were integrated into a piezo-driven chamber,and a novel valveless piezoelectric pump with the function of rectification(NVPPFR)was reported.Unlike previous pumps,the reported pump directed the reflux fluid to another flow channel different from the pumping fluid,thus improving pumping efficiency.Then,mathematical modeling was established,including the kinetic analysis of vibrator,flow loss analysis of fluid,and pumping efficiency.Eventually,experiments were designed,and results showed that NVPPFR had the function of rectification and net pumping effect.The maximum flow rate reached 6.89 mL/min,and the pumping efficiency was up to 27%.The development of NVPPFR compensated for the inefficiency of traditional valveless piezoelectric pumps,broadening the application prospect in biomedicine and biology fields. 展开更多
关键词 composite tube valveless piezoelectric pump RECTIFICATION energy efficiency
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一种改进的平板式无阀压电流体泵 被引量:8
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作者 李军 程光明 +3 位作者 杨志刚 吴博达 曾平 陈淑妍 《压电与声光》 CAS CSCD 北大核心 2001年第5期351-353,共3页
通过对带有缓冲腔和不带有缓冲腔的平板式无阀压电泵的对比实验 ,发现前者的性能大大优于后者 ,其输出能力提高了近 4倍。由于带有缓冲腔的无阀压电泵的最佳工作频率高于不带有缓冲腔的同类型无阀压电泵 ,使其可以获得比较平稳的流量输... 通过对带有缓冲腔和不带有缓冲腔的平板式无阀压电泵的对比实验 ,发现前者的性能大大优于后者 ,其输出能力提高了近 4倍。由于带有缓冲腔的无阀压电泵的最佳工作频率高于不带有缓冲腔的同类型无阀压电泵 ,使其可以获得比较平稳的流量输出。当锥形角为 6 .4°,驱动电压为 12 0 V,工作频率为 73Hz时 ,所制作的带有缓冲腔的压电泵具有最佳的工作性能 ,其进、出水口处的压力差达到 8.5 3× 10 2 展开更多
关键词 压电泵 无阀压电泵 微机械 收缩管 扩张管
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收缩管/扩张管型无阀压电泵的工作原理 被引量:21
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作者 李军 吴博达 +1 位作者 程光明 杨志刚 《压电与声光》 CSCD 北大核心 2000年第6期376-378,共3页
介绍了收缩管 /扩张管型无阀压电泵的一种典型结构 ,分别分析了收缩管和扩张管管内流动特性 ,认为收缩管 /扩张管在无阀压电泵中起动态阀的作用 ,其主要结构参数有锥形角和扩散比等 ,这些参数对泵的性能起决定性的影响。推导了此类无阀... 介绍了收缩管 /扩张管型无阀压电泵的一种典型结构 ,分别分析了收缩管和扩张管管内流动特性 ,认为收缩管 /扩张管在无阀压电泵中起动态阀的作用 ,其主要结构参数有锥形角和扩散比等 ,这些参数对泵的性能起决定性的影响。推导了此类无阀压电泵的流量计算公式及效率公式。 展开更多
关键词 收缩管 扩张管 无阀压电泵
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“Y”形流管无阀压电泵模拟与试验 被引量:21
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作者 张建辉 黎毅力 +1 位作者 刘菊银 夏齐宵 《光学精密工程》 EI CAS CSCD 北大核心 2008年第4期669-675,共7页
对"Y"形流管无阀压电泵内部流场及泵流量特性进行了模拟及试验研究。采用CFX软件对"Y"形流管无阀压电泵泵腔内的流场特性进行了模拟分析。结果表明:"Y"形流管无阀压电泵工作时泵腔内的压强变化很小,涡旋... 对"Y"形流管无阀压电泵内部流场及泵流量特性进行了模拟及试验研究。采用CFX软件对"Y"形流管无阀压电泵泵腔内的流场特性进行了模拟分析。结果表明:"Y"形流管无阀压电泵工作时泵腔内的压强变化很小,涡旋对流体传输活体细胞及长链大分子基本无影响。实际制作了"Y"形流管无阀压电泵,并通过改变"Y"形流管的几何尺寸,研究了压电泵进出口端压差的变化规律。试验结果表明,压差随支管夹角增大而减小,并且当两支管宽的和接近主管宽时,压差值达到最小,当支管夹角为5°,宽为1.2 mm时,压差达到最大725 Pa。 展开更多
关键词 “Y”形流管 压电泵 无阀泵 有限元法
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一种无阀压电微泵的研究 被引量:5
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作者 王海宁 崔大付 +2 位作者 耿照新 刘长春 陈兴 《压电与声光》 CSCD 北大核心 2006年第6期668-670,共3页
介绍了一种适用于微流体系统的无阀微泵。该微泵利用聚二甲基硅氧烷(PDMS)作为泵膜,利用硅各向异性腐蚀形成扩散口/喷口结构,并利用压电双晶片作为驱动部件。该微泵的制作工艺简单,使用寿命长,具有良好的液体驱动性能。对于使用15 mm长... 介绍了一种适用于微流体系统的无阀微泵。该微泵利用聚二甲基硅氧烷(PDMS)作为泵膜,利用硅各向异性腐蚀形成扩散口/喷口结构,并利用压电双晶片作为驱动部件。该微泵的制作工艺简单,使用寿命长,具有良好的液体驱动性能。对于使用15 mm长的压电双晶片作为驱动器的压电无阀微泵,在100 V6、0 Hz、占空比为1的方波驱动下,最大流速可达151μL/min。 展开更多
关键词 无阀 微泵 压电双晶片 PDMS
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