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Particuology 2022年第2期20卷 91-102页

作者： Liqing Sun Xiaodi Zhang Qingliang Zeng Kuidong Gao Kao Jiang Jiawei Zhou College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao 266590China Shandong Province Key Laboratory of Mine Mechanical Engineering Shandong University of Science and TechnologyQingdao 266590China School of Information Science and Engineering Shandong Normal UniversityJinan 250014China School of Mechanical Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China

Screw conveyors are widely employed in industrial fields for conveying bulk *** shearer drum which uses the screw conveying principle is responsible for excavation and conveying coal particles onto the chain *** conveyor performance is affected by potential factors,such as the blade axial tilt angle and style,core shaft form and *** effect of blade axial tilt angle on the conveying performance was investigated with the help of *** the case of the screw conveyor,the mass flow rate,and particle axial velocity increased with increasing positive axial tilt angle,and declined with increasing negative axial tilt *** the case of the drum,the mass flow rate,particle axial velocity,and loading rate first increased and then decreased with increasing positive axial tilt angle,and decreased with increasing negative axial tilt *** results can be considered as a benchmark for screw conveyor and drum structural designs with axial tilt screw blades.

关键词： Screw conveyor drum Axial tilt angle Conveying performance DEM

Establishment of wear model and life prediction of drum of hot rolling coiler

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Journal of Central South University 2011年第6期18卷 1808-1812页

作者：章健彭艳刘宏民刘云飞 State Key Laboratory of Metastable Materials Science and Technology Yanshan University Engineering Research Center of Rolling Equipment and Complete Technology of Ministry of Education Yanshan University

For the drum of hot rolling coiler is prone to be easily destroyed, the type of MMU-5G abrasion tester was applied to revealing the friction and wear behavior. The morphology observation by scanning electron microscope (SEM) demonstrates the wear mechanism of the drum, and the test data of the influence coefficient of the normal pressure, relative sliding speed and surface lubrication conditions acted on the linear rate of the wear could be obtained by the regression method. A calculation model, which considers the factors of the structure of the drum, coiling tension and coiling strip specifications, was established by the combination method to predict the wear life of the drum. Then the practical production data was applied into this model and the analysis result was in good accordance with that of actual production.

关键词： drum wear mechanism combination method wear model wear life

A New DPIV Proceeding Algorithm and Its Application in Particle Motion Study in a Rotary drum

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Journal of Thermal Science 2002年第2期11卷 186-192页

作者： Zhixiao Zhang Yong Chi Shuiqing Li Xiaojiang Shen Kefa Cen Zhejiang Univ Inst Thermal Power Engn Natl Key Lab MOE Clean Energy & Environm Engn Hangzhou 310027 Peoples R China

A new digital particle image velocimetry (DPIV) proceeding method, namely, consecutive motion vector estimation algorithm, which fully employs the global information of sequential gray images and the physics property of flow field to get the precise velocity vector at each pixel, is proposed. Therefore it enlarges the application range of DPIV, especially for high-speed flow, large velocity gradient flow and rotational flow. The new method is applied to study the particle motion qualitatively in a partially filled rotary drum in this work. The results indicate that the newly developed algorithm describes the real flow field of granular motion in the transverse plane of rotary drum more accurately than the conventional cross-correlation method, which is adopted here as the comparative one. It can be concluded from DPIV analysis that the burden bed in rotary drum consists of two distinct regions, the active layer and the plug flow region. Moreover, the boundary of these two regions is an arc and the

关键词： DPIV rotary drum granular flow motion estimation.

Factors affecting thin coal seam shearer drum coal-loading performance by a model test method

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Journal of Central South University 2019年第6期26卷 1619-1636页

作者： GAO Kui-dong XU Wen-bo JIANG Shou-bo DU Chang-long College of Mechanical & Electrical Engineering Shandong University of Science and TechnologyQingdao 266590China Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment China University of Mining and TechnologyXuzhou 221116China

To solve the problem of a low coal-loading rate being exhibited by the drum shearer on Chinese thin coal seams,systematic tests and research were performed to study the pivotal factors’influences on drum coal-loading rate using a model test *** effects of the drum hub diameter,cutting depth,vane helix angle,drum rotation speed and hauling speed on drum coal-loading rate were determined under circumstances of coal-loading with drum ejection and pushing modes,and reasons for these phenomena were *** results indicate that the influence of the drum cutting depth on the drum coal-loading rate is the most *** parameters of hub diameter,drum rotation speed and hauling speed can influence the drum coal-loading rate by cutting the coals’filling rate in the *** parameters of vane helix angle and drum rotation speed can influence drum coal-loading rates by influencing the ratio of cutting coals’tangential and axial speed in the *** coal-loading rate with drum ejection is clearly higher than that observed with drum *** in this study can provide support to design the drum structure and select drum operational parameters for a thin coal seam shearer.

关键词： thin coal seam shearer cutting drum coal-loading rate model test

DESIGN AND APPLICATION OF MODEL DZI LOG GRAPPLE DRIVEN BY AN ELECTRIC drum

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Journal of Northeast Forestry University 1993年第1期4卷 36-40页

作者： Wang Jingxin Pan DeluNortheast Forestry University

This article introduces the history and development of log grapple in ***-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calculated its parameters *** is the first loggrapple driven by an electric drum made successfully in *** Model DZ1 log grapple has alarge closing force,works safely and is suitable for the special forest working conditions inChina.

关键词： Log grapple Electric drum Design and application Forest operation

drum of CTP Device Dynamic Balance Based on Theory of Wavelet Transform

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International Journal of Plant Engineering and Management 2014年第2期19卷 122-128页

作者： HU Zhi-wei TANG Yong LI Li-li KODAK Electronic Products ( Shanghai) Co. Ltd

Conclusion is that the soft threshold de-noising effect is better than hard threshold de-noising though the signal to noise ratio and Root Mean Square error. After analyzing, de-noising and reconstructing signal through wavelet packet from Matlab software, the average value of peak extracted from signal reconstruction is gotten to provide data for dynamic balance. Making use of the influence coefficient method to adjust drum of CTP dynamic balance, the program of Matlab is used to find phase position and weight of the mass block quickly, which can provide evidence for software for dynamic balance developed.

关键词： wavelet transform de-noise influence coefficient method dynamic balance drum Matlab CTP

SOME MECHANISMS OF drum BRAKE OSCILLATION AND SQUEAL

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Journal of Shanghai Jiaotong university(Science) 1998年第2期3卷 20-26页

作者：蒋伟康

drum brake squeal is usually due to the unstable oscillation excited by the dry friction between the drum and linings. In order to understand the mechanisms of drum brake squeal, a new drum brake dynamics model in closed form is presented for analyzing the modes and stability of drum brake vibration, so as to judge whether a squeal will happen or not. Then, a non contact experimental vibration analysis procedure based on nearfield acoustical holography technique is developed for measuring the operating deflection shape of drum. The measured ODS of drum is nearly the same as the unstable oscillation with the largest real component of eigenvalue among all the complex modes of brake drum.

关键词： vehicle noise vibration drum brake squeal

Optimization Design for drum of Prepress Device

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International Journal of Plant Engineering and Management 2014年第1期19卷 46-51页

作者： HU Zhi-wei KODAK Electronic Products(Shanghai)Co. Ltd

Structural design for a drum of a CTP device and modal analysis by means of ANSYS workbench have been done to get the first four natural frequencies and vibration *** frequency and maximum deformation of drum as the optimization goal,three kinds of proposals are put forward based on the weak area of the *** means of adjusting static balance and adding thickness,an optimal project 3 is determined the best in the three kinds of *** first natural frequency of the drum optimized is increased by 33.1% than that before optimization,the maximum displacement is reduced by 23.2%.Testing the result of simulation meets image high quality requirements,dynamics analysis and structural optimization are realized.

关键词： prepress optimal design drum modal analysis vibration model natural frequency static balance

Reduction of Environmental Impact of drum Machine Washing

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Journal of Applied Mathematics and Physics 2020年第1期8卷 132-157页

作者： Pieter Broer van der Weg (Peter) Retired VU Amsterdam Shell R & D Rijswijk Stork DI Boxmeer Unilever R & D Vlaardingen Vlaardingen The Netherlands

An improvement of efficiency of the horizontally rotating drum washing machine is possible by using a more open type of drum, essentially without suds in the annulus, by using a pump to wet the clothes during rotation and fall. Modelling and simulation are used to quantify these claims and further optimize the design of the horizontal washing machine. The flow of suds inside the deforming clothes at impact with the drum is calculated. The wash performance is shown to be largely proportional to the open perforation area in the drum. The traditional design uses 1/8 of drum area for the perforation holes. A significant reduction of water, detergent, electrical energy, and wash time, with parity in wash performance, provides a step towards a cleaner and more sustainable future.

关键词： drum Wash Machine Design Efficiency Poroelastics Darcy Simulation Modelling

Integrated Phytodisinfectant-Sand Filter drum for Household Water Treatment in Subsaharan Africa

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Journal of Environmental Science and Engineering 2011年第8期5卷 947-954页

作者： K.A. Yongabi D.M. Lewis P.L. Harris School of Chemical Engineering The University of Adelaide Adelaide 5005 South Australia School of Agriculture and Wine The University of Adelaide Adelaide 5005 South Australia

This report details an assessment of an integrated low-technology phytodisinfectant-sand filter drum for household water and waste water treatment for sub-Saharan Africa, using bacterial culture tests, total solids, and turbidity amongst others is presented. A hundred litres of very dirty/turbid water （130.3 NTU） was pretreated with 100 seeds of Moringa olieferaand further filtered through a sand filter drum （120 litres carrying capacity） made of fine, coarse sand, charcoal and gravel. The mean total aerobic mesophilic bacterial counts, E coli, coliform, pseudomonas, and yeast counts, as well as turbidity of untreated water drastically reduced to wealth health organization acceptable standards for potable water. The results indicated that the mean values of the same parameters for sand filtered pond water alone was significantly lower than the corresponding mean values obtained for Moringa treated pond water. The findings from this study suggest strongly that an integral of two natural water purification technologies （phytodisinfectant-sand filter drum） could be applied for the treatment of all types of contaminated water rendering it free from pathogens for potable and non potable uses.

关键词： Phytodisinfectant bacteria pathogens turbidity sandfilter drum treatment