Analysis of Particle Motion in Vertical Shaft Impact Crusher Rotor

2011 ◽  
Vol 199-200 ◽  
pp. 54-57 ◽  
Author(s):  
De Rong Duan ◽  
Song Wang ◽  
Fang Zhao ◽  
Dong Ning Su
Keyword(s):  
Dynamic Simulation ◽  
Particle Motion ◽  
Maximum Force ◽  
Maximum Speed ◽  
Vertical Shaft ◽  
Particle Interactions ◽  
Average Force ◽  
Particle Field ◽  
Average Speed

The rotor of vertical shaft impact crusher was modeled by SolidWorks and imported into EDEM for dynamic simulation. The average speed, maximum speed, average force, maximum force with time were analyzed in rotor, so the true law of particles motion in rotor would be revealed, indicated that the speed of particle field in rotor increased with the rotor radius at the time of rotor work steady, about 80% of the particles were accelerated to the maximum speed, and the change of speed affected significantly the particle interactions.

scholarly journals Characteristics of Strong Updrafts in Precipitation Systems over the Central Tropical Pacific Ocean and in the Amazon

2005 ◽  
Vol 44 (5) ◽  
pp. 731-738 ◽  
Author(s):  
Nicholas F. Anderson ◽  
Cedric A. Grainger ◽  
Jeffrey L. Stith
Keyword(s):  
Mass Flux ◽  
Large Scale ◽  
Tropical Rainfall Measuring Mission ◽  
Maximum Speed ◽  
Tropical Pacific Ocean ◽  
Wet Season ◽  
Average Speed ◽  
Convective Storms ◽  
Similarities And Differences

Abstract Airborne in situ measurements of updrafts in tropical convective storms were analyzed to determine the similarities and differences between updrafts in a tropical continental and a tropical oceanic region. Two hundred fifteen updraft cores from the Tropical Rainfall Measuring Mission (TRMM) component of the Large Scale Biosphere–Atmosphere (LBA) experiment (tropical continental wet season) and 377 updraft cores from the Kwajalein Experiment (KWAJEX) (tropical oceanic) were analyzed in a similar manner to that of previous studies of tropical updrafts. Average speed, maximum speed, width, and mass flux of the updraft cores from the TRMM-LBA and KWAJEX were generally similar to each other and also were similar to results from previous studies of tropical updrafts.

scholarly journals Pelanggaran Kecepatan Kendaraan pada Ruas Jalan Tol Cipularang. (Hal. 39-49)

2019 ◽  
Vol 5 (1) ◽  
pp. 39
Author(s):  
Rizki Intan Mauliza ◽  
Tania Bonita Sabrina ◽  
Wahyu Maulana
Keyword(s):  
Search Method ◽  
Primary Data ◽  
Maximum Speed ◽  
Speed Limit ◽  
Toll Roads ◽  
Passenger Cars ◽  
Passenger Car ◽  
Average Speed ◽  
Toll Road ◽  
Road Speed

ABSTRAKSalah satu faktor penyebab kecelakaan yang signifikan adalah tidak sesuainya kecepatan kendaraan dengan kondisi jalan, lingkungan dan kegiatan, dalam hal ini adalah kecepatan yang terlalu tinggi. Jalan tol/jalan bebas hambatan merupakan salah satu jalan yang berpotensi memiliki banyak pelanggaran dalam kecepatan kendaraan. Batasan kecepatan jalan tol telah di atur dalam PM Hub 111/2015 yaitu 40 km/jam untuk tol dalam kota dan 60 km/jam - 100 km/jam untuk tol luar kota. Untuk memastikan kecepatan rata-rata kendaraan dan menentukan tingkat pelanggaran kendaraan yang melintasi ruas jalan tol Cipularang maka penelitian menggunakan metode pengumpulan data primer/pengamatan secara langsung. Hasil analisis secara keseluruhan didapatkan bahwa rata-rata kecepatan kendaraan mobil penumpang sebesar 88 km/jam, truk 62 km/jam dan bus 72 km/jam dengan persentasi kecepatan rata-rata untuk mobil penumpang, truk dan bus berturut-turut sebesar 43%, 5% dan 22%. Hal ini menunjukan terdapat pelanggaran batas kecepatan maksimum untuk kendaraan mobil penumpang dengan prosentase yang tinggi (lebih dari 30%) atau kecepatan rata-rata lebih dari 80 km/jam.Kata kunci: kecelakaan, batas kecepatan, jalan tol ABSTRACTOne factors of a significant accident is not according to the speed of the vehicle with the environment, environment and activities, in this case the speed is too high. Toll road / freeway is one of the roads that has many roads in the vehicle. The toll road speed limit has been set in PM Hub 111/2015, which is 40 km/hour  for city tolls and 60 km/hour  100 km/hour for out-of-city toll roads. To determine the average speed of a vehicle and determine the level of the vehicle passing through the Cipularang toll road, the study uses the primary data / direct search method. The overall analysis results are obtained that the average speed of passenger car vehicles is 88 km/hour, trucks 62 km/hour and buses 72 km/hour with the percentage of average speed for passenger cars, trucks and buses being helped-along by 43%, 5% and 22%. This shows the maximum speed limit for passenger car vehicles with a higher percentage (more than 30%) or an average speed of more than 80 km/hour.Keywords: accidents, speed limits, toll roads

Paper 5. Industrial Vehicle Torque Converter Transmissions

1969 ◽  
Vol 184 (9) ◽  
pp. 97-113
Author(s):  
D. J. K. Stuart
Keyword(s):  
Electric Vehicle ◽  
Duty Cycle ◽  
High Performance ◽  
Torque Converter ◽  
Maximum Speed ◽  
Delivery Vehicle ◽  
Auxiliary Equipment ◽  
Average Speed ◽  
Design Specifications ◽  
Private Car

The highway vehicle is concerned with transporting persons or freight over substantial distances, usually at as high an average speed as the conditions will permit. The high-performance private car and the door-to-door delivery vehicle represent opposite ends of the scale of the duty cycle. In the latter case, the very cycle itself—stop-start characteristics, the high percentage of standing time resulting in relatively small mileage, and the small penalty of limited maximum speed—represents cumulative factors in respect of which the basic economics of the battery-operated electric vehicle dominates other considerations. Thus, in order to arrive at design specifications it is essential to consider the duty cycle which, in the case of all types of industrial vehicle, is characterized by the need to execute a high proportion of forward/reverse manoeuvres, long periods of low-speed operation, and the provision of an increasing complexity of powered auxiliary equipment.

Research of the Installation Angle of New Rotor Impact Plate Based on EDEM

2011 ◽  
Vol 80-81 ◽  
pp. 1133-1137
Author(s):  
De Rong Duan ◽  
Fang Zhao ◽  
Song Wang ◽  
Xian Xin Chen
Keyword(s):  
Dynamic Simulation ◽  
Impact Force ◽  
Three Dimensional ◽  
Substantial Effect ◽  
Maximum Speed ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Installation Angle ◽  
Impact Plate ◽  
The Impact

The three-dimensional model of new rotor was imported into EDEM for dynamic simulation, the maximum speed and force were analysied in the EDEM,indicating that the material along the deterministic trajectory collide with the impact plate for second acceleration after the first acceleration in new rotor, the velocity after second acceleration was 2.3 times than the first acceleration.The impact force and angle did not substantial effect on the second acceleration by comprehensive comparing,the 69m/s speed and less impact force were generated in the new rotor with 2° impact plate installation angle.

scholarly journals Quantitative evaluation of tongue protrusion force

2010 ◽  
Vol 36 (1) ◽  
pp. 33-43
Author(s):  
Renata Furlan ◽  
◽  
Amanda Valenti ◽  
Tatiana Vargas de Castro ◽  
Cláudio Gomes de Costa ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Isometric Force ◽  
The Elderly ◽  
Elderly Group ◽  
Maximum Force ◽  
Tongue Strength ◽  
Tongue Protrusion ◽  
Average Force ◽  
New Device ◽  
Significant Difference

The tongue plays an important role in the functions of speech, mastication, swallowing, and breathing. The tongue helps in the maintenance of proper dental alignment and arch stability. Adequate strength is essential for the tongue to perform these tasks. Recently the Biomechanical Engineering Group from Universidade Federal de Minas Gerais, Brazil, developed a device to improve tongue strength evaluation. The purpose of this study is to describe and compare the main results obtained in tongue protrusion force measurements in different age groups using this new device. Fifteen healthy subjects were given a qualitative evaluation and determined to have normal tongue strength. They were separated by age in three groups: children, adults and elderly. They were then given a quantitative evaluation. Maximum and average forces were analyzed. The time taken to reach maximum force was also assessed. Higher values of maximum and average tongue force were obtained in the adult group, followed by the elderly group and the group of children. Older subjects had greater tongue force when compared to children. However, there were statistically significant differences in the average force and in the maximum force only between children and adults. Time taken to reach maximal isometric force was longer in the elderly group and shorter in the group of children than in the group of adults although no statistically significant difference was found between groups.

Maximum Speed of Female High School Runners

1987 ◽  
Vol 3 (2) ◽  
pp. 110-127 ◽  
Author(s):  
John W. Chow
Keyword(s):  
High School ◽  
Stride Frequency ◽  
Maximum Speed ◽  
Final Phase ◽  
Average Speed ◽  
Significant Difference ◽  
Female High School ◽  
Support Time

The purposes of this study were to develop a cinematographic technique to obtain selected parameters over an entire 100-m ran and to evaluate selected characteristics of the maximum speed phase (MSP) and the final phase (FP) for female high school runners. The MSP was defined as the part of the 100-m run consisting of the five consecutive strides which together have the largest average speed value, and the FP as the last 10 m of the 100-m run. Twelve sprinters with best 100-m times from 12.3 to 13.4 s served as subjects. The major findings of this study were that (a) maximum speeds of 8.0-8.4 m/s were reached 23-37 m from the start, (b) an average of 7.3% of the maximum speed was lost by the FP, (c) no significant difference was found between the average stride lengths during the MSP and the FP, (d) the average stride frequency during the FP was equal to 93% of the corresponding value during the MSP, and (e) the decrease in average speed from the MSP to the FP was associated with an increase in support time from the MSP to the FP.

Wear of Throwing End of Vertical Shaft Impact Crusher

2012 ◽  
Vol 155-156 ◽  
pp. 501-504
Author(s):  
Jun Ming Zhang
Keyword(s):  
Dynamic Simulation ◽  
Working Conditions ◽  
Virtual Prototyping ◽  
Critical Issue ◽  
Rotor System ◽  
Spindle Speed ◽  
Vertical Shaft ◽  
Cast Material ◽  
System A ◽  
Main Material

Statistics show that China currently applied in the vertical shaft impact crusher, the intensity itself is not a major problem affecting the life, the most critical issue is the main material throw head wear . Vertical shaft impact crusher rotor system based on virtual prototyping, combined with the actual working conditions and research objectives, in ADAMS dynamic simulation of the rotor system, a spindle speed at 1600r/min obtained when different materials on the first intermediate principal cast material suffered impact relationships

scholarly journals Dynamic Analysis of a 165Kg Spot Welding Robot

2011 ◽  
Vol 2-3 ◽  
pp. 366-371 ◽  
Author(s):  
Li Cheng ◽  
Yu Wang Liu ◽  
Hong Guang Wang ◽  
Yong Chang ◽  
Yi Feng Song ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Spot Welding ◽  
Maximum Speed ◽  
Welding Robot ◽  
Maximum Acceleration ◽  
Maximum Payload ◽  
Euler Approach ◽  
The Moment ◽  
Driving Torque

A novel 165Kg spot welding robot is introduced, which is independently developed by China. The Newton-Euler approach is used to derive the dynamic equation. Then, entity model of the robot is built up with Solidworks software. The motion of the robot is planned by the position, velocity and acceleration of all the joint. The first three joints, which bear most of the payload and the own weight of the robot, are set with maximum acceleration during the accelerating/ decelerating process. According to the planned trajectory, dynamic simulation is carried out using Solidworks. The driving torques of each joint are obtained. From the dynamic analysis, we find the position yielding the maximum driving torque while the robot is moving with the maximum payload and the maximum speed. The moment of inertia is a predominant influence in the causation of big actuating torque.

The New Rotor Diameter Selection of Vertical Shaft Impact Crusher Based on EDEM

2011 ◽  
Vol 148-149 ◽  
pp. 1033-1036
Author(s):  
De Rong Duan ◽  
Fang Zhao ◽  
Xian Xin Chen ◽  
Wei Guo
Keyword(s):  
Dynamic Simulation ◽  
Vertical Shaft ◽  
The Subject ◽  
Impact Plate ◽  
Installation Radius ◽  
The Impact ◽  
Selection Of ◽  
Better Than

The five rotor models of traditional 850mm, 200*400,200*500,250*500,300*500 and 300*600 were imported into EDEM for dynamic simulation, indicated that the acceleration efficiency of new rotor was better than the traditional. In the new rotor, when the subject rotor radius was the constant, the greater the impact plate installation radius, the better the acceleration efficiency; when the impact plate installation radius was the constant, the greater the subject rotor radius, the better the acceleration efficiency.

Decrease Selected Graphomotor Skills in Early Stages of Alzheimer's Dementia

2017 ◽  
Vol 41 (S1) ◽  
pp. S652-S653
Author(s):  
E.J. Gorzelańczyk ◽  
K. Pasgreta ◽  
P. Walecki
Keyword(s):  
Magnetic Field ◽  
Demographic Characteristics ◽  
Maximum Speed ◽  
Study Group ◽  
Average Speed ◽  
Specialized Software ◽  
Early Stages ◽  
Drawing Test ◽  
Graphic Tablet ◽  
Competing Interest

IntroductionIn the early stages of Alzheimer's disease (AD) motor and cognitive dysfunctions has been observed.ObjectivesIn previous studies we have shown that AD patients present abnormalities of selected graphomotor skills, but results were vary and not conclusive. In this study, we conducted more extensive tests on a larger study group.AimsThe aim of the study is to identify which graphomotor functions are impaired in the early stages of AD.MethodsSeventy-one patients with mild and moderate AD (F.00.0, F.00.1, F.00.2) (MMSE 20.3 ± 3.8; age 79.1 ± 5.21) were examined. Forty-four healthy ones (C) without symptoms of dementia, matched for demographic characteristics (MMSE 29 ± 1.1; age 78.3 ± 4.7) were examined. Graphomotor skills were assessed by the original drawing test (the eight figures and the signature) performed in a magnetic field (resolution 2540 dpi and 1024 pressure levels). These test were implemented on a graphic tablet (Wacom Intuos) with the specialized software. The length and time of drawing, the average and maximum speed of drawing, the average and maximum momentary speed, the amplitude and frequency (with FFT spectrum analysis) of hand tremors were measured.ResultsStatistical analysis of the graphomotor signal revealed differences between the AD group and the C group with respect to various parameters. The largest differences have been observed in partially automated skills such as signature, and not drawing shapes (lines, spiral, etc.). The average speed of signature and maximum momentary speed of signature is lower in the AD group.ConclusionsThis method allows for quantitative and objective measurement of the biophysical signal and assessment of the graphomotor skills.Disclosure of interestThe authors have not supplied their declaration of competing interest.

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