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Wear mechanism of disc-brake block material for new type of drilling rig

WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 10-16 doi: 10.1007/s11465-008-0009-2

Abstract: To improve friction and wear performance and service life of the disc-brake pair material of a drillingrig, a new type of asbestos-free frictional material with better performance for disc-brake blocks isTopography and elementary components of the brake block’s wear surface are analyzed by employing SEMAt the beginning of wear, the hard peaks from the friction surface of the disc-brake plough on the surfaceof the brake block.

Keywords： asbestos-free frictional     Fracture     cyclization     friction     disc-brake    

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Vibration analysis of blade-disc coupled structure of compressor

WANG Chunjie, SONG Shunguang, ZONG Xiao

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 302-305 doi: 10.1007/s11708-008-0064-8

Abstract: While a 3D assembly model of blade-disc structure was established, a finite element model for calculatingthe vibration characteristics during blade-disc coupling was built by taking into consideration thecoupling action of contact stress between the blade and the disc.The vibration characteristics of the blade-disc coupling structure was calculated and analyzed using

Keywords： blade-disc coupling     assembly     experiment     vibration     blade-disc structure    

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Real-time monitoring of brake shoe keys in freight cars

Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3,   Pages 191-204 doi: 10.1631/FITEE.1400305

Abstract: The brake shoe key (BSK) is an important component in the brake system, and its absence will lead to

Keywords： Condition monitoring     Feature expression     Brake shoe key     Machine vision    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: The disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardTo analyze the rotation state, cutting performance, and adaptability of disc cutters during shield tunnelingAdditionally, the parameters of the models are modified based on laboratory disc cutter excavation testThe results of numerical calculation can reflect the load level and the behavior of the disc cuttersThe disc cutters in the center of the cutterhead should be specified with a lower starting torque to

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Frontiers of Structural and Civil Engineering   Pages 1370-1386 doi: 10.1007/s11709-023-0947-0

Abstract: The tunnel boring machine (TBM) is typically used in hard-rock tunnel excavation. Owing to the unsatisfactory adaptability of TBM to the surrounding rock, when crossing high-strength and high-wear strata, the TBM can easily cause defects, such as abnormal wear on cutters and overload damage to bearings, thus affecting the construction efficiency and cost. Therefore, high-pressure waterjet technology should be applied to assist in rock breaking for efficient TBM tunneling. In this study, the effects of water pressure, nozzle diameter, and nozzle speed on cutting are investigated via laboratory experiments of cutting hard rock using high-pressure waterjets. The penetration performance of the TBM under different water pressures is investigated via a field industrial penetration test. The results show that high-pressure waterjets are highly efficient for rock breaking and are suitable for industrial applications, as they can accommodate the advancing speed of the TBM and achieve high-efficiency rock breaking. However, during the operation of high-pressure waterjets, the ambient temperature and waterjet temperature in the tunnel increase significantly, which weakens the cooling effect of the cutterhead and decreases the construction efficiency of the TBM. Therefore, temperature control and cooling measures for high-pressure waterjets during their long-term operation must be identified. This study provides a useful reference for the design and construction of high-pressure water-jet-assisted cutterheads for breaking road headers.

Keywords： tunnel boring machine     hard-rock cutting     free face     disc cutter     rock-cutting efficiency    

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Effects of inclination angles of disc cutter on machining quality of Nomex honeycomb core in ultrasonic

Yidan WANG, Renke KANG, Yan QIN, Qian MENG, Zhigang DONG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 285-297 doi: 10.1007/s11465-021-0631-9

Abstract: Ultrasonic cutting with a disc cutter is an advanced machining method for the high-quality processingHowever, in existing research, the effect of the disc cutter orientation on the machining quality hasnot been studied in depth, and practical guidance for the use of disc cutters is lacking.In this work, the inclined ultrasonic cutting process with a disc cutter was analyzed, and cutting experimentsThis study investigates the influence of the inclination angles of a disc cutter on the machining quality

Keywords： Nomex honeycomb core     disc cutter     inclined ultrasonic cutting     machining quality    

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Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 24-31 doi: 10.1007/s11783-008-0024-x

Abstract: Reverse osmosis system with the disc-tube module (DT-RO) was applied to treat landfill leachate on full

Keywords： chemical cleaning     product     organic     nitrogen     Effective    

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Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

A. F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 156-160 doi: 10.1007/s11705-014-1427-9

Abstract: hydroxyapatite (Mg-HAP) nanoparticles were produced by a reaction-precipitation process by using a spinning discIn particular, they were 51 nm in average size when the two reagents were fed over the disc symmetricallyat 3 cm from the disc center and a rotational speed of the disc reactor equal to 1400 r/min was adopted

Keywords： hydroxyapatite     nanoparticles     spinning disc reactor    

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Adenovirus-mediated tissue inhibitor of metalloproteinase-3 gene transfection inhibits rabbit intervertebral disc

Xudong YU MM, Zengwu SHAO MD, Liming XIONG MD, Weiwei XU MM, Hezhong WANG MM, Huifa XU MM,

Frontiers of Medicine 2009, Volume 3, Issue 4,   Pages 415-420 doi: 10.1007/s11684-009-0072-z

Abstract: carrying tissue inhibitor of metalloproteinase-3 (RAdTIMP-3) against degeneration of rabbit intervertebral discMild or moderate rabbit lumbar disc degeneration model was constructed with the controllable axial loadingSafranin O-Fast green staining and type II collagen staining demonstrated better reserved integrity of discRAdTIMP-3 can effectively protect the matrix of rabbit intervertebral disc against overloading-induceddegeneration in a dose-dependent manner, resulting in the alleviation of disc degeneration.

Keywords： tissue inhibitor of metalloproteinase-3     intervertebral disc     rabbit     gene therapy    

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Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 150-159 doi: 10.1007/s11465-013-0266-6

Abstract: main purpose of this study is to analyze the thermomechanical behavior of the dry contact between the brake

Keywords： brake disks     heat flux     heat-transfer coefficient     Von Mises stress     contact pressure    

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Three-dimensional electromagnetic analysis and design of permanent magnet retarder

Lezhi YE, Desheng LI, Bingfeng JIAO

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 438-441 doi: 10.1007/s11465-010-0111-0

Abstract: An eddy current retarder for vehicles generates much heat when it works continuously, which leads to serious decline in braking torque. This paper proposes a novel permanent magnet retarder (PMR) for vehicles, whose cooling system connects with engine cooling-water. A three-dimensional finite element model is developed to model the electromagnetic behavior of a permanent magnet retarder under a constant speed. The magnetic field and eddy current field in PMR are numerically solved by a finite element method. By accounting for the nonlinear permeability of the rotor and the weakened effect in the magnetic field that is generated by the eddy current magnetic field, the calculation accuracy of air-gap magnetic field is enhanced. Experiment shows that the temperature of the retarder is less than 150°C, and the braking torque keeps the hard characteristics curve. The calculated air-gap magnetic flux density is fairly good agreement with the measured one.

Keywords： auxiliary brake     permanent magnet retarder     water-cooling     finite element method    

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Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine

K. RAJKUMAR, P. GOVINDARAJAN

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 398-403 doi: 10.1007/s11708-011-0157-7

Abstract: conducted in the above said engine for different loads and the following performance characteristics like brakepower (BP), specific fuel consumption (SFC), mean effective pressure, brake thermal efficiency, mechanical

Keywords： oxygen enriched combustion     exhaust gas temperature     brake power (BP)     specific fuel consumption (SFC)    

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Prediction of Disc Cutter Life During Shield Tunneling with AI via the Incorporation of a Genetic Algorithm Article

Khalid Elbaz, Shui-Long Shen, Annan Zhou, Zhen-Yu Yin, Hai-Min Lyu

Engineering 2021, Volume 7, Issue 2,   Pages 238-251 doi: 10.1016/j.eng.2020.02.016

Abstract:

Disc cutter consumption is a critical problem that influences work performance during shield tunnelingThis study proposes a new model to estimate the disc cutter life (Hf) by integratingWith the proposed model, monitoring data including the shield performance database, disc cutter consumptionThe results indicate that the hybrid model predicts disc cutter life with high accuracy.The sensitivity analysis reveals that the penetration rate (PR) has a significant influence on disc cutter

Keywords： Disc cutter life     Shield tunneling     Operational parameters     GMDH–GA    

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Combined static mixers for high viscous fluids mixing

Zhenhao XI, Weizhen SUN, Ling ZHAO, Zhaoyan LIU

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 93-96 doi: 10.1007/s11705-009-0112-x

Abstract: A new static mixer Cross-over-Disc has been invented to strip off the boundary layer and to make strongThe pressure drop of Cross-over-Disc is 12—26 times as large as that of empty pipe with equivalent diameterThe mixing performance of Cross-over-Disc with 14 elements has been investigated in the viscosity rangeFurthermore, mixing inhomogeneity for a combination of static mixing elements (four from Cross-over-Disc

Keywords： static mixer     Cross-over-Disc     pressure drop     mixing performance     high viscous fluid    

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Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 486-494 doi: 10.1007/s11708-015-0368-4

Abstract: The brake thermal efficiency (BTE) was increased and brake specific fuel consumption (BSFC) decreased

Keywords： hydrogen     brake thermal efficiency     crank angle     compressed ignition (CI)    

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Title Author Date Type Operation

Wear mechanism of disc-brake block material for new type of drilling rig

WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo

Journal Article

Vibration analysis of blade-disc coupled structure of compressor

WANG Chunjie, SONG Shunguang, ZONG Xiao

Journal Article

Real-time monitoring of brake shoe keys in freight cars

Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Journal Article

Effects of inclination angles of disc cutter on machining quality of Nomex honeycomb core in ultrasonic

Yidan WANG, Renke KANG, Yan QIN, Qian MENG, Zhigang DONG

Journal Article

Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

Journal Article

Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

A. F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Journal Article

Adenovirus-mediated tissue inhibitor of metalloproteinase-3 gene transfection inhibits rabbit intervertebral disc

Xudong YU MM, Zengwu SHAO MD, Liming XIONG MD, Weiwei XU MM, Hezhong WANG MM, Huifa XU MM,

Journal Article

Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Journal Article

Three-dimensional electromagnetic analysis and design of permanent magnet retarder

Lezhi YE, Desheng LI, Bingfeng JIAO

Journal Article

Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine

K. RAJKUMAR, P. GOVINDARAJAN

Journal Article

Prediction of Disc Cutter Life During Shield Tunneling with AI via the Incorporation of a Genetic Algorithm

Khalid Elbaz, Shui-Long Shen, Annan Zhou, Zhen-Yu Yin, Hai-Min Lyu

Journal Article

Combined static mixers for high viscous fluids mixing

Zhenhao XI, Weizhen SUN, Ling ZHAO, Zhaoyan LIU

Journal Article

Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Journal Article