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| 1 | Determination of 15 phthalate esters in air by gas-phase and particle-phase simultaneous sampling显示文摘Based on previous research,the sampling and analysis methods for phthalate esters(PAEs)were improved by increasing the sampling flow of indoor air from 1 to 4 L/min,shortening the sampling duration from 8 to 2 hr. Meanwhile,through the optimization of chromatographic conditions,the concentrations of 9 additional PAE pollutants in indoor air were measured. The optimized chromatographic conditions required a similar amount of time for analysis as before,but gave high responsivity,the capability of simultaneously distinguishing 15 kinds of PAEs,and a high level of discrimination between individual sample peaks,as well as stable peak generation. The recovery rate of all gas-phase and particle-phase samples of the 15 kinds of PAEs ranged from 91.26% to 109.42%,meeting the quantitative analysis requirements for indoor and outdoor air sampling and analysis. For the first time,investigation of the concentration levels as well as characteristics of 15 kinds of PAEs in the indoor air from four different traffic micro-environments(private vehicles,busses,taxis and subways)was carried out,along with validation of the optimized sampling and analytical method. The results show that all the 9 additional PAEs could be detected at relatively high pollution levels in the indoor air from the four traffic micro-environments. As none of the pollution levels of the 15 kinds of PAEs in the indoor air from the 4 traffic micro-environments should be neglected,it is of great significance to increase the types of PAEs able to be detected in indoor air. | Chenchen Chi Meng Xia Chen Zhou Xueqing Wang Mili Weng Xueyou Shen | 2017 | Journal of Environmental Sciences2017，29，5： | 7 |
| 2 | Analysis of the influencing factors of PAEs volatilization from typical plastic products显示文摘The primary emphasis of this research was to investigate the foundations of phthalate(PAEs) pollutant source researches and then firstly confirmed the concept of the coefficient of volatile strength, namely phthalate total content in per unit mass and unit surface area of pollutant sources. Through surveying and evaluating the coefficient of volatile strength of PAEs from typical plastic products, this research carried out reasonable classification of PAEs pollutant sources into three categories and then investigated the relationship amongst the coefficient of volatile strength as well as other environmental factors and the concentration level of total PAEs in indoor air measured in environment chambers.Research obtained phthalate concentration results under different temperature, humidity,the coefficient of volatile strength and the closed time through the chamber experiment. In addition, this study further explored the correlation and ratio of influencing factors that affect the concentration level of total PAEs in environment chambers, including environmental factors, the coefficient of volatile strengths of PAEs and contents of total PAEs in plastic products. The research created an improved database system of phthalate the coefficient of volatile strengths of each type of plastic goods, and tentatively revealed that the volatile patterns of PAEs from different typical plastic goods, finally confirmed that the coefficient of volatile strengths of PAEs is a major factor that affects the indoor air total PAEs concentration, which laid a solid foundation for further establishing the volatile equation of PAEs from plastic products. | Weidong Chen Chenchen Chi Chen Zhou Meng Xia Cees Ronda Xueyou Shen | 2018 | Journal of Environmental Sciences2018，30，4： | 5 |
| 3 | Exosomal PD-L1 induces osteogenic differentiation and promotes fracture healing by acting as an immunosuppressant显示文摘A moderate inflammatory response at the early stages of fracture healing is necessary for callus formation.Over-active and continuous inflammation,however,impairs fracture healing and leads to excessive tissue damage.Adequate fracture healing could be promoted through suppression of local over-active immune cells in the fracture site.In the present study,we achieved an enriched concentration of PD-L1 from exosomes(Exos)of a genetically engineered Human Umbilical Vein Endothelial Cell(HUVECs),and demonstrated that exosomes overexpressing PD-L1 specifically bind to PD-1 on the T cell surface,suppressing the activation of T cells.Furthermore,exosomal PD-L1 induced Mesenchymal Stem Cells(MSCs)towards osteogenic differentiation when pre-cultured with T cells.Moreover,embedding of Exos into an injectable hydrogel allowed Exos delivery to the surrounding microenvironment in a time-released manner.Additionally,exosomal PD-L1,embedded in a hydrogel,markedly promoted callus formation and fracture healing in a murine model at the early over-active inflammation phase.Importantly,our results suggested that activation of T cells in the peripheral lymphatic tissues was inhibited after local administration of PD-L1-enriched Exos to the fracture sites,while T cells in distant immune organs such as the spleen were not affected.In summary,this study provides the first example of using PD-L1-enriched Exos for bone fracture repair,and highlights the potential of Hydrogel@Exos systems for bone fracture therapy through immune inhibitory effects. | Ze Lin Yuan Xiong Weilin Meng Yiqiang Hu Lili Chen Lang Chen Hang Xue Adriana CPanayi Wu Zhou Yun Sun Faqi Cao Guodong Liu Liangcong Hu Chenchen Yan Xudong Xie Chuanchuan Lin Kaiyong Cai Qian Feng Bobin Mi Guohui Liu | 2022 | Bioactive Materials2022，7，7： | 4 |
| 4 | Ecology of industrial pollution in China显示文摘Industrial development has brought China both opportunities and challenges since the reform and opening up in 1978.Spatial and temporal analysis showed that rapid industrialization has made eastern China under a more serious pollution stress.The most serious effects of industrial pollution were reflected in aquatic and soil ecosystem degradation,and damage can be observed from species,population,and community to ecosystem level.Public consciousness about contaminated sites rose from 2004 leading to greater efforts in ecological remediation,monitoring,and risk governance.Considerable efforts are still needed in expanding the extent and breadth of monitoring to explore where the greatest ecological risks lie and how to control them.Ecology of industrial pollution has become a popular discipline in China and will be further developed to help achieve the Sustainable Development Goals.Future research for a better ecological risk management should be focused on multi-media transfer and effects of mixed pollutants,mechanisms for clean energy and material flow,and integration of ecological risk with human health risk. | Jingjing Yuan Yonglong Lu Chenchen Wang Xianghui Cao Chunci Chen Haotian Cui Meng Zhang Cong Wang Xiaoqian Li Andrew C.Johnson Andrew J.Sweetman Di Du | 2020 | Ecosystem Health and Sustainability2020，6，1： | 2 |
| 5 | How aerosol direct effects influence the source contributions to PM2.5 concentrations over Southern Hebei, China in severe winter haze episodes显示文摘 | Litao Wang Joshua S. Fu Wei Wei Zhe Wei Chenchen Meng Simeng Ma Jiandong Wang | 2018 | Frontiers of Environmental Science & Engineering2018，12，3： | 2 |
| 6 | Activation of androgen receptor induces ID1 and promotes hepatocellular carcinoma cell migration and invasion显示文摘 | Junping Ao Jiao Meng Lei Zhu Huizhen Nie Chenchen Yang Jinjun Li Jianren Gu Qiushi Lin Weiwen Long Xiaoqun Dong Chao Li | 2012 | Molecular Oncology2012，，5： | 1 |
| 7 | Angiotensin converting enzyme inhibitors and angiotensin receptor blockers improved the outcome of patients with severe COVID-19 and hypertension显示文摘Dear Editor.Hypertension was reportedly the most common coexisting condition of COVID-19 as 15%-31.2%patients with COVID-19 had hypertension,and the incidence of hypertension reached 58.3%in COVID-19 patients requiring ICU care(Wang et al.,2020).However,it remains unclear whether combined hypertension carries an increased risk for a worse outcome in patients with COVID-19 and what clinical factors independently predict death in these patients. | Xiao Meng Ya Liu Chenchen Wei Kai Zhang Yi Zhang Ming Zhong Cheng Zhang Yun Zhang | 2021 | Science China(Life Sciences)2021，64，5： | 1 |
| 8 | Quantifying the sources of the severe haze over the southern Hebei using the CMAQ model显示文摘 | Yang Jing Zhang Pu Meng Chenchen | 2013 | The Scientific World Journal2013，，： | 1 |
| 9 | Bio-template Synthesis of Spirulina/a-Fe2O3 Composite with Improved Surface Wettability显示文摘 | MENG Qingling XIE Chenchen DING Ran CAO Liang MA Ke LI Li WENG Zhankun WANG Zuobin | 2018 | Chemical Research in Chinese Universities2018，34，6： | 0 |
| 10 | Timing and Single-pulse Study of Pulsar J1909+0122 Discovered by CRAFTS显示文摘We report the discovery of PSR J1909+0122 by the Five-hundred-meter Aperture Spherical Radio Telescope(FAST)as part of the Commensal Radio Astronomy FAST Survey.PSR J1909+0122 has a spin period of 1.257 s and a dispersion measure of 186.2 pc cm^(-3).The averaged pulse profile shows two distinct components.We performed a single-pulse study based on a one-hour observation at 1.25 GHz on 2021 August 23.We used a threshold of 5σ_(ep) to measure the nulling fraction(NF)as 63%±1.5%.The longitude-resolved fluctuation spectra and fast Fourier transform spectra of the binary sequences revealed the quasi-periodicity of nulling with a period of 30 rotation periods.We examined the reliability of the periodicity by comparing it to random noise injection.The NF,E,and modulation periodicity P_(M) of PSR J1909+0122 were compared with other periodic nulling pulsars,showing that the source of J1909+0122 has the second largest NF in the population.Long-term timing observations over six months were used to derive the phase-connected ephemeris of this pulsar.The measured P and P values disfavor dipolar geometry for polar gap models,and the prediction for a space-charge-limited flow model in the case of inverse Compton scattering is only just above the death line.In this work,PSR J1909+0122 has revealed possible correlations between nulling behavior and pulsar properties,which will help to shed light on the pulsar emission mechanism and its temporal evolution in future observations. | Yutong Chen Pei Wang Di Li Erbil Gügercinoğlu Rushuang Zhao Lingqi Meng Jianping Yuan Jiarui Niu Weiwei Zhu Yi Feng Chenchen Miao Chenhui Niu Qingdong Wu Na Wang Shen Wang Xiaoyao Xie Mengyao Xue Jumei Yao Mao Yuan Shanping You Xuhong Yu Youling Yue Jie Zhang Junshuo Zhang Lei Zhang Yabiao Wang Zhenye Gan Yuxi Li Zhongyi Sun Chengjie Wang | 2023 | Research in Astronomy and Astrophysics2023，23，8： | 0 |
| 11 | Molecular confined synthesis of magnetic CoO_(x)/Co/C hybrid catalyst for photocatalytic water oxidation and CO_(2)reduction显示文摘Photosynthesis[6CO_(2)+12H_(2)O→(CH_(2)O)+6O_(2)+6H_(2)O]in nature contains a light reaction process for oxygen evolution and a dark reaction process for carbon dioxide(CO_(2))reduction to carbohydrates,which is of great significance for the survival of living matter.Therefore,for simulating photosynthesis,it is desirable to design and fabricate a bifunctional catalyst for promoting photocatalytic water oxidation and CO_(2)reduction performances.Herein,a molecular confined synthesis strategy is reasonably proposed and applied,that is the bifunctional CoO_(x)/Co/C-T(T=700,800 and 900℃)photocatalysts prepared by the pyrolysis of molecular Co-EDTA under N_(2) and air atmosphere in turn.Among the prepared photocatalysts,the CoOx/Co/C-800 shows the best photocatalytic water oxidation activity with an oxygen yield of 51.2%.In addition,for CO_(2)reduction reaction,the CO evolution rate of 12.6μmol/h and selectivity of 75%can be achieved over this catalyst.The improved photocatalytic activities are attributed to the rapid electron transfer between the photosensitizer and the catalyst,which is strongly supported by the current densityvoltage G-V,steady-state and time-resolved photoluminescence spectra(PL).Overall,this work provides a reference for the preparation and optimization of photocatalysts with the capacity for water oxidation and CO_(2)reduction reactions. | Rui Li Chenchen Zhang Kejia You Bonan Li Wei Bu Xiangyu Meng Baochun Ma Yong Ding | 2023 | Chinese Chemical Letters2023，34，12： | 0 |
| 12 | Rational Design of Cellulosic Triboelectric Materials for Self‑Powered Wearable Electronics显示文摘With the rapid development of the Internet of Things and flexible electronic technologies,there is a growing demand for wireless,sustainable,multifunctional,and independently operating self-powered wearable devices.Nevertheless,structural flexibility,long operating time,and wearing comfort have become key requirements for the widespread adoption of wearable electronics.Triboelectric nanogenerators as a distributed energy harvesting technology have great potential for application development in wearable sensing.Compared with rigid electronics,cellulosic self-powered wearable electronics have significant advantages in terms of flexibility,breathability,and functionality.In this paper,the research progress of advanced cellulosic triboelectric materials for self-powered wearable electronics is reviewed.The interfacial characteristics of cellulose are introduced from the top-down,bottom-up,and interfacial characteristics of the composite material preparation process.Meanwhile,the modulation strategies of triboelectric properties of cellulosic triboelectric materials are presented.Furthermore,the design strategies of triboelectric materials such as surface functionalization,interfacial structure design,and vacuum-assisted self-assembly are systematically discussed.In particular,cellulosic self-powered wearable electronics in the fields of human energy harvesting,tactile sensing,health monitoring,human–machine interaction,and intelligent fire warning are outlined in detail.Finally,the current challenges and future development directions of cellulosic triboelectric materials for self-powered wearable electronics are discussed. | Xiangjiang Meng Chenchen Cai Bin Luo Tao Liu Yuzheng Shao Shuangfei Wang Shuangxi Nie | 2023 | Nano-Micro Letters2023，15，8： | 0 |
| 13 | Interfacial Chemistry Enables Highly Reversible Na Extraction/Intercalation in Layered-Oxide Cathode Materials显示文摘Comprehensive Summary Layered transition-metal oxides are promising cathode candidates for sodium-ion batteries.However,the inferior interphase formation and particulate fracture during sodiation/desodiation result in structure degradation and poor stability.Herein,the interface chemistry of P2-Na_(0.640)Ni_(0.343)Mn_(0.657)O_(2)in an electrolyte of 1.0 mol/L NaPF6 in diglyme is unveiled to enable highly reversible Na extraction and intercalation.The uniform and robust cathode-electrolyte interphase layer is in situ formed with decomposition of diglyme molecules and anions in initial cycles.The NaF-and CO-rich CEI film exhibits high mechanical strength and ionic conductivity,which suppresses the reconstruction of its electrode interphase from P2 phase to spinel-like structure and reinforces its structure integrity without cracks.This favours facile Na+transport and stable bulk redox reactions.It is demonstrated to show long cycling stability with capacity retention of 94.4%for 180 cycles and superior rate capability.This investigation highlights the cathode interphase chemistry in sodium-ion batteries. | Chenchen Wang Kuan Wang Meng Ren Yaohui Huang Kai Zhang Changzhong Liao Kaimin Shih Pengfei Yan Fujun Li | 2023 | Chinese Journal of Chemistry2023，41，15： | 0 |
| 14 | Chemical Synthesis of diSUMO Photoaffinity Probes for the Identification of PolySUMO Chain-Specific Interacting Proteins显示文摘Small ubiquitin-like modifiers(SUMOs)are protein modifiers that can form polymeric chains.They are important signals in cellular processes,and their study and profiling require the development of molecular tools.Herein,the authors have reported an efficient chemical protein synthesis approach for the generation of dimeric SUMO-2-based photoaffinity probes through the ligation of four readily synthesizable peptides.Proteomic studies using this diSUMO-2 probe on HeLa cell nuclear lysate found it to capture a significantly different selection of proteins compared with its monoSUMO counterparts.This resulted in the identification of several previously unknown SUMO chain-specific interacting proteins such as 40S ribosomal protein S3,which showed a significantly higher affinity for polySUMO chains than monomeric SUMO.Collectively,these results emphasize the need to develop SUMO chain-based probes in other species,and to shed light on the important role of polySUMOylation in diseases. | Yu Wang Chenchen Chen Xianbin Meng Jian Fan Man Pan Jingnan Chen Haiteng Deng Jing Shi Lei Liu Yi-Ming Li | 2021 | CCS Chemistry2021，3，4： | 0 |
| 15 | Churning loss characteristics of a wet three-phase high-speed reluctance motor显示文摘With the increasing requirements of electro-hydrostatic actuators(EHAs)for power,volume,and pressure,there is a growing tendency in the industry to combine the motor and pump to form a so-called'motor pump'to improve the integration.In this paper,a novel structure for a wet three-phase high-speed reluctance motor pump is proposed,which can further improve integration by removing the dynamic seal on the pump shaft,thereby avoiding the problems of dynamic seal wear and oil leakage and improving heat dissipation under high-speed working conditions.However,after the motor is wetted,the churning loss caused by immersion of the rotor in the oil causes additional fluid resistance torque.Based on fundamental fluid mechanics,an analytical model of the churning torque of a wet motor was established.To verify the accuracy of the analytical model,a simulation model of churning loss was established based on computational fluid dynamics(CFD),and the churning torque and flow field state were analyzed.Finally,an experimental prototype was designed and manufactured,and a test bench for churning loss was built.The oil churning torque was measured at different speeds and temperatures.The results from the analytical,simulation,and experimental models agreed well.The experimental results validated the analytical model and CFD simulation.This research provides a practical method for calculating the churning loss and serves as guidance for future optimization of churning loss reduction. | Zhenzhou ZHANG Mingzhu DAI Chenchen ZHANG Yi CHEN Bin MENG | 2024 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2024，25，3： | 0 |
| 16 | Flexible Nanopaper Composed of Wood-Derived Nanofibrillated Cellulose and Graphene Building Blocks显示文摘Nanopaper has attracted considerable interest in the fields of films and paper research.However,the challenge of integrating the many advantages of nanopaper still remains.Herein,we developed a facile strategy to fabricate multifunctional nanocomposite paper(NGCP)composed of wood-derived nanofibrillated cellulose(NFC)and graphene as building blocks.NFC suspension was consisted of long and entangled NFCs(10–30 nm in width)and their aggregates.Before NGCP formation,NFC was chemically modified with a silane coupling agent to ensure that it could interact strongly with graphene in NGCP.The resulting NGCP samples were flexible and could be bent repeatedly without any structural damage.Within the NGCP samples,the high aspect ratio of NFC made a major contribution to its high mechanical strength,whereas the sheet-like graphene endowed the NGCP with electrical resistance and electrochemical activity.The mechanical strength of the NGCP samples decreased as their graphene content increased.However,the electrical resistance and electrochemical activity of the NGCP samples both rose with increasing content of graphene.The NGCPs still kept advantageous mechanical properties even at high temperatures around 300℃ because of the high thermal stability of NFCs and their strong entangled web-like structures.In view of its sustainable building blocks and multifunctional characteristics,the NGCP developed in this work is promising as low-cost and high-performance nanopaper. | Qing Li Ming Dai Xueren Qian Tian Liu Zhenbo Liu Yu Liu Ming Chen Wang He Suqing Zeng Yu Meng Chenchen Dai Jing Shen Yingtao Liu Wenshuai Chen Wenbo Liu Ping Lu | 2021 | Journal of Renewable Materials2021，9，3： | 0 |
| 17 | Ultralow-strain Ti substituted Mn-vacancy layered oxides with enhanced stability for sodium-ion batteries显示文摘Anionic redox reaction(ARR) in layered manganese-based oxide cathodes has been considered as an effective strategy to improve the energy density of sodium-ion batteries.Mn-vacancy layered oxides deliver a high ARR-related capacity with small voltage hysteresis,however,they are limited by rapid capacity degradation and poor rate capability,which arise from inferior structure changes due to repeated redox of lattice oxygen.Herein,redox-inactive Ti^(4+)is introduced to substitute partial Mn^(4+)to form Na_(2) Ti_(0.5)Mn_(2.5)O_7(Na_(4/7)[□_(1/7)Ti_(1/7)Mn_(5/7)]O_(2),□ for Mn vacancies),which can effectively restrain unfavorable interlayer gliding of Na2 Mn307 at high charge voltages,as reflected by an ultralow-strain volume variation of 0.11%.There is no irreversible O_(2) evolution observed in Na_(2) Ti_(0.5)Mn_(2.5)O_7 upon charging,which stabilizes the lattice oxygen and ensures the overall structural stability.It exhibits increased capacity retention of 79.1% after 60 cycles in Na_(2) Ti_(0.5)Mn_(2.5)O_7(17.1% in Na_(2) Mn_(3) O_7) and good rate capability(92.1 mAh g^(-1) at 0.5 A g^(-1)).This investigation provides new insights into designing high-performance cathode materials with reversible ARR and structural stability for SIBs. | Yanchen Liu Chenchen Wang Meng Ren Hengyi Fang Zhuoliang Jiang Fujun Li | 2021 | Journal of Energy Chemistry2021，30，12： | 0 |
| 18 | LncRNA-CCAT5-mediated crosstalk between Wnt/β-Catenin and STAT3 signaling suggests novel therapeutic approaches for metastatic gastric cancer with high Wnt activity显示文摘Background:Although the constitutively activated Wnt/β-catenin signaling pathway plays vital roles in gastric cancer(GC)progression,few Wnt inhibitors are approved for clinical use.Additionally,the clinical significance of long non-coding RNAs(lncRNAs)in GC intraperitoneal dissemination(IPD)remains elusive.Here,we investigated the function and therapeutic potential of Wnt-transactivated lncRNA,colon cancer-associated transcript 5(CCAT5),in GC metastasis.Methods:LncRNA-sequencing assay was performed to document abun-dance changes of lncRNAs induced by Wnt family member 3A(Wnt3a)and degradation-resistantβ-catenin(S33Y mutated)in ascites-derived GC cells with low Wnt activity.Luciferase reporter,Chromatin immunoprecipitation(ChIP)-re-ChIP assays were performed to determine how CCAT5 was tran-scribed.The clinical significance of CCAT5 was examined in 2 cohorts of GC patients.The biological function of CCAT5 was investigated through gain-and loss-of-function studies.The molecular mechanism was explored through RNA-sequencing,mass spectrometry,and CRISPR/Cas9-knocknout system.The therapeutic potential of CCAT5 was examined through RNAi-based cell xenograft model and patient-derived xenograft(PDX)model of IPD.Results:WeidentifiedanovelWnt-regulatedlncRNA,CCAT5,whichwastrans-activated by theβ-catenin/transcription factor 3(TCF3)complex.CCAT5 was significantly upregulated in GC and predicted poor prognosis.Functional studies confirmed the promotive role of CCAT5 in GC growth and metastasis.Mechanis-tically,CCAT5 bound to the C-end domain of signal transducer and activator of transcription 3(STAT3)and blocks Src homology 2 domain-containing protein tyrosine phosphatase 1(SHP-1)-mediated STAT3 Y705 dephosphorylation,leading to STAT3 nuclear entry and transactivation,thus accelerating GC progression.Furthermore,we demonstrated that both Wnt3a andβ-catenin acted as activa-tor of STAT3 signaling pathway,and the interplay between CCAT5 and STAT3 was functionally essential for Wnt-drived STAT3 signaling and tumor evolu-tion.Finally,we revealed in vivo si-CCAT5 selectively attenuated growth and metastasis of Wnt high GC,but not Wnt low GC.The combination of si-CCAT5 and oxaliplatin displayed obvious synergistictherapeuticeffectson Wnt high PDX mice.Conclusions:We identified a novel Wnt-transactivated lncRNA,CCAT5.Our study revealed a mechanism of STAT3 signaling regulation via canonical Wnt signaling and the functional significance of CCAT5 as critical mediator.We pro-vided conceptual advance that lncRNAs serve as therapeutic targets reversing GC progression. | Chenchen Liu Aiwen Shen Junquan Song Lei Cheng Meng Zhang Yanong Wang Xiaowen Liu | 2024 | Cancer Communications2024，44，1： | 0 |
| 19 | Driving forces for ultrafast laser-induced sp^(2) to sp^(3) structural transformation in graphite显示文摘Understanding the microscopic mechanism of photoinduced sp^(2)-to-sp^(3) structural transformation in graphite is a scientific challenge with great importance.Here,the ultrafast dynamics and characteristics of laser-induced structural transformation in graphite are revealed by non-adiabatic quantum dynamic simulations.Under laser irradiation,graphite undergoes an interlayer compression and sliding stage,followed by a key period of intralayer buckling and interlayer bonding to form an intermediate sp^(2)-sp^(3) hybrid structure,before completing the full transformation to hexagonal diamond.The process is driven by the cooperation of charge carrier multiplication and selective phonon excitations through electron-phonon interactions,in which photoexcited hot electrons scattered into unoccupied high-energy conduction bands play a key role in the introduction of in-plane instability in graphite.This work identifies a photoinduced non-adiabatic transition pathway from graphite to diamond and shows far-reaching implications for designing optically controlled structural phase transition in materials. | Chenchen Song Mengxue Guan Yunzhe Jia Daqiang Chen Jiyu Xu Cui Zhang Sheng Meng | 2023 | npj Computational Materials2023，，1： | 0 |
| 20 | Theoretical and experimental investigation on the efficiency of a novel roller piston pump显示文摘This study presents a novel roller piston pump,in which a cam guide-roller type rolling support is adopted to replace the sliding pair support of the swash plate-slipper pair to achieve the oil suction and discharge of the piston cavity.In addition,the shaft distribution is used to replace the original valve plate distribution and the driving shaft is used as the distribution shaft to remove the valve plate structure,which greatly simplifies the design of the axial piston pump.Such a configuration largely reduces the number of sliding friction pairs of the pump,and avoids the influence of the sliding friction pair on it under high-speed and variable-speed conditions.Firstly,mathematical models of the mechanical and volumetric efficiencies of the roller pump are deduced respectively through force analysis and the compressibility equation.Based on the numerical simulation of MATLAB and AMESim,the effects of load pressure and rotational speed on mechanical and volumetric efficiencies are studied respectively,and it is verified that the roller pump has no structural flow pulsation.The prototype pump is then designed and built,along with a special test rig.The outlet pressure,outlet flow,and torque of the pump under different load pressures and rotational speeds are measured,and the mechanical and volumetric efficiencies of the prototype pump under various load pressures and rotational speeds are obtained.The experimental results are in good agreement with the simulated analysis.When the load pressure is 8 MPa and the speed is 5000 r/min,the mechanical and the volumetric efficiencies are 85.5% and 96.8%,respectively.When the speed is increased to 10000 r/min,the mechanical and the volumetric efficiencies are 66.7% and 95.6%,respectively.The experimental results show that the proposed roller piston pump has excellent efficiency under wide-speed and high-speed conditions and can be a potential solution as a fuel pump in aerospace fuel systems. | Chenchen ZHANG Yiren ZANG Heyuan WANG Bin MENG Sheng LI Jian RUAN | 2023 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2023，24，9： | 0 |
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