Abstract
The micropump is the heart of microfluidics systems. However, for mechanical micropumps, bearing wear failure has been a major obstacle to performance and reliability. Hydrodynamic suspension, which can make the rotating components levitate in liquid without any mechanical friction, is applied to break this bottleneck. In this paper, a novel kind of hydrodynamic suspension micropump (HSMP) without a grooved thrust bearing is proposed. Based on the centrifugal effect, the HSMP uses a rotating rotor to accelerate and pressurize adjacent fluid, and thus reacting forces are generated on the rotor surfaces to levitate it. The mechanisms of suspension forces formation, the centrifugal effect and the wedge effect in the liquid films near the rotor are identified using theoretical analysis and simulation. The variation in suspension forces with rotor position is investigated, revealing that the suspension bearings of the HSMP, similar to a spring damper, can self-adjust suspension forces along with a change in rotor position. Moreover, the suspension stiffness is positively correlated with the rotating speed. The HSMP prototype designed herein, whose overall size is only 34 mm × 34 mm × 31 mm, can provide a maximum output performance of 3230 mL/min and 96.3 kPa at 20000 r/min, which is manyfold greater than other micropumps. The proposed HSMP is demonstrated to be more powerful with a simple structure, high power density, and high reliability.
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Mohith S, Karanth P N, Kulkarni S M. Recent trends in mechanical micropumps and their applications: A review. Mechatronics, 2019, 60: 34–55
Han D, Gu H, Kim J, et al. A bio-inspired 3D-printed hybrid finger with integrated ECF (electro-conjugate fluid) micropumps. Sens Actuat A-Phys, 2017, 257: 47–57
Mi S, Pu H, Xia S, et al. A minimized valveless electromagnetic micropump for microfluidic actuation on organ chips. Sens Actuat A-Phys, 2020, 301: 111704
Mao Z, Yoshida K, Kim J. Active sorting of droplets by using an ECF (Electro-conjugate Fluid) micropump. Sens Actuat A-Phys, 2020, 303: 111702
Wang Y N, Fu L M. Micropumps and biomedical applications—A review. MicroElectron Eng, 2018, 195: 121–138
Song P, Kuang S, Panwar N, et al. A self-powered implantable drug-delivery system using biokinetic energy. Adv Mater, 2017, 29: 1605668
Akyazi T, Gil-González N, Basabe-Desmonts L, et al. Manipulation of fluid flow direction in microfluidic paper-based analytical devices with an ionogel negative passive pump. Sens Actuat B-Chem, 2017, 247: 114–123
Zhao B, Cui X, Ren W, et al. A controllable and integrated pump-enabled microfluidic chip and its application in droplets generating. Sci Rep, 2017, 7: 11319
Cheng S, Olles M W, Burger A F, et al. Optimization of a hybrid magnetic bearing for a magnetically levitated blood pump via 3-D FEA. Mechatronics, 2011, 21: 1163–1169
Smakulski P, Pietrowicz S. A review of the capabilities of high heat flux removal by porous materials, microchannels and spray cooling techniques. Appl Thermal Eng, 2016, 104: 636–646
Wu R, Fan Y, Hong T, et al. An immersed jet array impingement cooling device with distributed returns for direct body liquid cooling of high power electronics. Appl Thermal Eng, 2019, 162: 114259
Hetsroni G, Gurevich M, Rozenblit R. Sintered porous medium heat sink for cooling of high-power mini-devices. Int J Heat Fluid Flow, 2006, 27: 259–266
Laser D J, Santiago J G. A review of micropumps. J Micromech Microeng, 2004, 14: R35–R64
Li H, Liu J, Li K, et al. A review of recent studies on piezoelectric pumps and their applications. Mech Syst Signal Process, 2021, 151: 107393
Zhang J J, Chen Y W, Liu Y, et al. Experimental investigation on heat transfer characteristics of microcapsule phase change material suspension in array jet impingement. Sci China Tech Sci, 2022, 65: 1634–1645
Rife J C, Bell M I, Horwitz J S, et al. Miniature valveless ultrasonic pumps and mixers. Sens Actuat A-Phys, 2000, 86: 135–140
Yun H, Kong D, Aoyagi M. Characteristics of thickness-vibration-mode PZT transducer for acoustic micropumps. Sens Actuat A-Phys, 2021, 332: 113206
Lee G H, Kim H R. Design analysis of DC electromagnetic pump for liquid sodium–CO2 reaction experimental characterization. Ann Nucl Energy, 2017, 109: 490–497
Sedky M, Serry M. High efficiency 3D printed electromagnetic micropump with a synchronous active valve. Sens Actuat A-Phys, 2022, 341: 113570
Li X, Liu S, Fan P, et al. A bubble-assisted electroosmotic micropump for a delivery of a droplet in a microfluidic channel combined with a light-addressable potentiometric sensor. Sens Actuat B-Chem, 2017, 248: 993–997
Ai Y, Yalcin S E, Gu D, et al. A low-voltage nano-porous electroosmotic pump. J Colloid Interface Sci, 2010, 350: 465–470
Ha S M, Cho W, Ahn Y. Disposable thermo-pneumatic micropump for bio lab-on-a-chip application. MicroElectron Eng, 2009, 86: 1337–1339
Mucchi E, Rivola A, Dalpiaz G. Modelling dynamic behaviour and noise generation in gear pumps: Procedure and validation. Appl Acoustics, 2014, 77: 99–111
Nath A G, Sarath Krishnan E, Cheriyan S, et al. Design and manufacture of miniature hydraulic gear pump for bio-medical application. Mater Today-Proc, 2018, 5: 25570–25580
Tran C D, Pham P H, Nguyen T K, et al. A new structure of Tesla coupled nozzle in synthetic jet micro-pump. Sens Actuat A-Phys, 2020, 315: 112296
Huang Y, Zhang J H, Hu X Q, et al. Dynamics analysis and experiment on the fishtailing type of valveless piezoelectric pump with rectangular vibrator. Sci China Tech Sci, 2010, 53: 3241–3247
Duan B, Luo M, Yuan C, et al. Multi-objective hydraulic optimization and analysis in a minipump. Sci Bull, 2015, 60: 1517–1526
Wang J, Chen Z, Yang S, et al. Geometric design and analysis of a novel sliding vane vacuum pump with three chambers. Mechanism Machine Theor, 2019, 141: 52–66
Luo X W, Zhu L, Zhuang B T, et al. A novel shaft-less double suction mini pump. Sci China Ser E-Technol Sci, 2010, 53: 105–110
Wu R, Lan W, Yu X, et al. Numerical study of the flow condition of the hydrodynamic levitated mechanical micropump. In: ASME 2018 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. San Francisco: ASME, 2018
Zhang J, Zhu H, Yang C, et al. Multi-objective shape optimization of helico-axial multiphase pump impeller based on NSGA-II and ANN. Energy Convers Manage, 2011, 52: 538–546
Pei Y, Liu Q, Wang C, et al. Energy efficiency prediction model and energy characteristics of subsea disc pump based on velocity slip and similarity theory. Energy, 2021, 229: 120690
Kimman M H, Langen H H, Munnig Schmidt R H. A miniature milling spindle with active magnetic bearings. Mechatronics, 2010, 20: 224–235
Pai C N, Shinshi T, Shimokohbe A. Sensorless measurement of pulsatile flow rate using a disturbance force observer in a magnetically levitated centrifugal blood pump during ventricular assistance. Flow Measurement Instrumentation, 2010, 21: 33–39
Zhu H, Gu Z. Active disturbance rejection control of 5-degree-of-freedom bearingless permanent magnet synchronous motor based on fuzzy neural network inverse system. ISA Trans, 2020, 101: 295–308
Micha P T, Mohan T, Sivamani S. Design and analysis of a permanent magnetic bearing for vertical axis small wind turbine. Energy Procedia, 2017, 117: 291–298
Guan Y, Liu S, Li H. Study on magnetic bearings system in axial-flow blood pump. In: 2010 International Conference on Mechanic Automation and Control Engineering. Wuhan: IEEE, 2010. 3903–3907
Yang S M, Ming-Shi Huang. Design and implementation of a magnetically levitated single-axis controlled axial blood pump. IEEE Trans Ind Electron, 2009, 56: 2213–2219
Lin X, Wang R, Zhang S, et al. Study on dynamic characteristics for high speed water-lubricated spiral groove thrust bearing considering cavitating effect. Tribol Int, 2020, 143: 106022
Wu R, Duan B, Liu F, et al. Design of a hydro-dynamically levitated centrifugal micro-pump for the active liquid cooling system. In: 2017 18th International Conference on Electronic Packaging Technology. Harbin: IEEE, 2017. 402–406
Yu Y, Pu G, Jiang T, et al. Discontinuous grooves in thrust air bearings designed with CAPSO algorithm. Int J Mech Sci, 2020, 165: 105197
Xiang G, Han Y, Chen R, et al. A hydrodynamic lubrication model and comparative analysis for coupled microgroove journal-thrust bearings lubricated with water. Proc Institution Mech Engineers Part J-J Eng Tribol, 2020, 234: 1755–1770
Luo X, Liu F, Duan B, et al. Micro hydraulic suspension mechanical pump. US Patent, US 10495093B2, 2019-12-03
Xiang G, Wang J, Han Y, et al. Investigation on the nonlinear dynamic behaviors of water-lubricated bearings considering mixed thermoelastohydrodynamic performances. Mech Syst Signal Processing, 2022, 169: 108627
Han Q, Ruan X, Chen W, et al. Numerical simulation and experimental research on passive hydrodynamic bearing in a blood pump. Chin J Mech Eng, 2013, 26: 967–973
van Buuren S W, Hetzler H, Hinterkausen M, et al. Novel approach to solve the dynamical porous journal bearing problem. Tribol Int, 2012, 46: 30–40
Xie Z L, Jiao J, Yang K, et al. Investigation on the stability and anti-eccentric load margin of a novel structure bearing lubricated by low viscosity medium. Sci China Tech Sci, 2022, 65: 1613–1633
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This work was supported by the Open Fund of Science and Technology on Thermal Energy and Power Laboratory (Grant No. TPL2019B03).
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Xing, G., Xue, S., Hong, T. et al. A novel hydrodynamic suspension micropump using centrifugal pressurization and the wedge effect. Sci. China Technol. Sci. 66, 2047–2058 (2023). https://doi.org/10.1007/s11431-022-2306-9
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DOI: https://doi.org/10.1007/s11431-022-2306-9