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Journal articles on the topic 'Three Rollers'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Zhu, Chengcheng, Fan Li, Yuanzhe Dong, Shengdun Zhao, Jingxiang Lv, and Dean Meng. "The Rollers’ Offset Position Influence on the Counter-Roller Flow-Forming Process." Metals 12, no. 9 (2022): 1471. http://dx.doi.org/10.3390/met12091471.

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Background: The general counter-roller flow-forming (CRFF) process rarely considers the roller’s offset position for the symmetric rollers. However, the rollers’ offset position can regulate the tube shape, force, and other features. Studying the novel asymmetric CRFF process, which is the CRFF process with the rollers’ offset position, is essential. Methods: The influence of the rollers’ offset position, the tube blank thickness, thickness reduction on the material deformation, flow-forming force, final tube middle radius, and thickness in the CRFF process are studied using AA5052 aluminum tu

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2

Qin, Qin, Ming Li, and Jianlin Huang. "Analysis of the Influence of Segmented Rollers on Slab Bulge Deformation." Metals 9, no. 2 (2019): 231. http://dx.doi.org/10.3390/met9020231.

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The bulge deformation of the continuous casting slab must be controlled in order to improve the slab quality. In this study, a coupled three-dimensional thermomechanical model is suggested based on dynamic contact between the slab and the rollers, so as to investigate the influence of the rollers in reducing slab bulge deformation. Moreover, the rigid casting rollers in this model are replaced by elastic casting rollers in order to improve the calculation accuracy. Further, the influence of two-segment and three-segment rollers on the slab bulge deformation is systematically studied. The resul

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3

Ashish, B. Pendharkar, and S. Dhamande Laxmikant. "Titanium Alloy is Best Material for Roller Shaft in Sugar Mill." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 10, no. 12 (2021): 1–6. https://doi.org/10.35940/ijitee.J9417.10101221.

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In sugar industry, the sugar processing done in different sections, but to increase total crushing per day (TCD) capacity, the milling section takes a vital role in the sugar industry. The sugar industry aims to extract the maximum amount of juice from sugarcane. In the milling section, the processed sugarcane is fed in between the three-roller shaft from the different arrangements, there are different loads applied on each part roller shafts. When load between all rollers varies then there is a chance of bending it is analyzed to check the roller shaft condition. The modeling is done on rolle

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4

Chen, De Sheng, and Xue Wen Du. "A Self-Adaptively Loading Mechanism for Planetary Cylindrical Roller Traction Drives." Advanced Materials Research 479-481 (February 2012): 865–71. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.865.

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A planetary cylindrical roller traction drive was developed. It is comprised of a sun roller, three planet rollers, an outer ring, a planet carrier and an input shaft. The sun roller is hollow, and is connected through three segments of logarithmic spiral profile to the input shaft. As the input shaft rotates relative to the sun roller, a wedging action takes place between the input shaft and the sun roller; this makes the sun roller produce a certain amount of radial displacement, so an appreciable amount of normal load is thus generated between the rollers of the planetary traction-drive dev

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5

Deshpande, Sagar S., Mike Falk, and Nathan Plooster. "Semi-Automated Roller Parameters Extraction from Terrestrial Lidar." Photogrammetric Engineering & Remote Sensing 87, no. 12 (2021): 879–90. http://dx.doi.org/10.14358/pers.21-00005r2.

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Rollers are an integral part of a hot-rolling steel mill. They transport hot metal from one end of the mill to another. The quality of the steel highly depends on the surface quality of the rollers. This paper presents semi-automated methodologies to extract roller parameters from terrestrial lidar points. The procedure was divided into two steps. First, the three-dimensional points were converted to a two-dimensional image to detect the extents of the rollers using fast Fourier transform image matching. Lidar points for every roller were iteratively fitted to a circle. The radius and center o

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6

HE, Peiyu, Yi DING, Yun WANG, Fuzhu LI, Weili LIU, and Hua WANG. "analysis method of carrying capacity accuracy of three-row roller slewing bearing." Mechanics 28, no. 4 (2022): 266–72. http://dx.doi.org/10.5755/j02.mech.29914.

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Three-row roller slewing bearings are one of the critical core components of large rotating equipment. Heavy-duty conditions have extremely high requirements for the carrying capacity. The new load capacity analysis method proposed in this paper can effectively improve the accuracy and efficiency of the carrying capacity analysis of three-row roller slewing bearings. The three-row roller slewing bearing solid rollers are replaced in the model by the upper and lower halves of the rollers and two springs. The local contact model of the three-row roller slewing bearing was established and verifie

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7

Lai, Yi-Horng, Ai-Yi Wang, Chia-Chi Yang, and Lan-Yuen Guo. "The Recovery Benefit on Skin Blood Flow Using Vibrating Foam Rollers for Postexercise Muscle Fatigue in Runners." International Journal of Environmental Research and Public Health 17, no. 23 (2020): 9118. http://dx.doi.org/10.3390/ijerph17239118.

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Purpose: To determine the effect of vibrating rollers on skin blood flow after running for recovery from muscle fatigue. Method: 23 healthy runners, aged between 20 to 45 years, participated in a crossover trial. Muscle fatigue was induced by running, and recovery using a vibrating roller was determined before and after the intervention. Each subject was measured at three time points (prerun, postrun, and postroller) to compare skin blood flow perfusion and blood flow oscillation at the midpoint of the dominant gastrocnemius muscle. The results show that blood perfusion is greater when a vibra

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8

Göncz, Peter, Rok Potočnik, and Srečko Glodež. "Lifetime Determination of the Raceway of a Large Three-Row Roller Slewing Bearing." Key Engineering Materials 488-489 (September 2011): 113–16. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.113.

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This paper deals with calculation procedure for lifetime determination of a large three-row roller slewing bearing. First, the contact force distribution between the rollers and the bearing raceway is determined both analytically and numerically. Then, the position and the magnitude of the maximum contact force are identified. In a separate numerical model finite element analyses are performed to determine the subsurface stress distribution as the result of contact between the raceway and different rollers. These stress fields serve as an input for the fatigue lifetime calculation, which is do

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9

Horng, T.-L. "An analytical solution of the stiffness equation for linear guideway type recirculating rollers with arbitrarily crowned profiles." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 6 (2009): 1351–58. http://dx.doi.org/10.1243/09544062jmes1208.

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This article derives the stiffness equation for linear guideway type (LGT) recirculating rollers with arbitrarily crowned profiles. Recirculating rollers compressed between a carriage and a profile rail are simulated as rollers compressed between two plates, and each roller is divided into three parts: two crowned and one cylindrical. The superposition method is introduced to obtain the stiffness equation for a crowned roller, for which rollers with circular, quadratic, cubic, fourth-order power, and exponential profiles were analysed. A model of discrete normal springs is used to obtain the s

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10

Zhao, Hong Sheng, and Yun Zhen Wu. "A New Roller Conveyor Driven by Linear Motor." Advanced Materials Research 201-203 (February 2011): 1517–20. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1517.

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To solve technical problems of current roller conveyor, such as big volume, complex structure and heavy maintenance workload, a new roller conveyor has been researched by adopting advanced technology of three-phase A.C linear motor. It has no intermediate transmission units that exist in the conventional roller conveyor, and is a new form structure of the conveyor. The device consists mainly of rollers and linear motors. The roller serves as driving and load-bearing mechanism, and as the rotor of linear motor, too. In the process of operation, with rollers served as the carriers, the friction

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11

Zhang, Yang, Ji Fei Cai, and Kang Le Zou. "Study of Powder Removing Technique for Film Laminating." Applied Mechanics and Materials 312 (February 2013): 494–97. http://dx.doi.org/10.4028/www.scientific.net/amm.312.494.

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According to the result of survey and research, the device combining powder sweeping and powder sticking is used for powder removing. Powder sweeping section is to use three soft brush rollers, covered with a large air suction device. Powder sticking section is to use a rubber roller and a hot pressing steel roller, with a hard brush roller which can sweep the powder on the rollers surface, extracting the powder to the filter device via exhausting pipe.

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12

Pendharkar, Ashish B., and Laxmikant S. Dhamande. "Titanium Alloy is Best Material for Roller Shaft in Sugar Mill." International Journal of Innovative Technology and Exploring Engineering 10, no. 12 (2021): 1–6. http://dx.doi.org/10.35940/ijitee.j9417.10101221.

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In sugar industry, the sugar processing done in different sections, but to increase total crushing per day (TCD) capacity, the milling section takes a vital role in the sugar industry. The sugar industry aims to extract the maximum amount of juice from sugarcane. In the milling section, the processed sugarcane is fed in between the three-roller shaft from the different arrangements, there are different loads applied on each part roller shafts. When load between all rollers varies then there is a chance of bending it is analyzed to check the roller shaft condition. The modeling is done on rolle

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13

Harsa Dhani, Reinardi Oddilian Jahu, and Nereus Tugur Redationo. "MAINTENANCE ON SUGAR CANE MILL ROLLERS TO PREVENT WEAR AND DAMAGE." Mechanical, Energy and Material (METAL) 1, no. 2 (2023): 31–35. https://doi.org/10.59581/metal.v1i2.91.

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One of the reasons the Sugar Factory failed to meet its sugar production target was due to damage to the machine components, particularly at the milling station, where the milling rollers are located. The milling rollers play a crucial role in extracting juice from sugar cane, separating the juice from the bagasse, and measuring the raw juice before it enters the purification process. This unit is designed to maximize raw juice yield while minimizing the amount of bagasse. The milling rollers are arranged in a triangular configuration of three mills, with a milling path between the front and r

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14

Storm, Birgit Kjærside, and Liliana Aurelia Schjøtt. "Industrial Rollers in PUR Made for Slaughterhouses." Applied Mechanics and Materials 371 (August 2013): 687–94. http://dx.doi.org/10.4028/www.scientific.net/amm.371.687.

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ndustrial rollers made in polyurethane, PUR, are made to be used in a conveyer system in slaughterhouses. The rollers are made by the company Dansk Gummiindustri A/S. During use the rollers or the materials give some problems with the durability. Break in the rollers come much earlier than expected. An intensively investigation of the rollers has therefore been made. The investigations have been on the mechanical and chemical properties of the rollers. During their lifetime the rollers are cleaned at least once per day with cleaning agents of different types. The mechanical forces on the rolle

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15

Sakaguchi, Tomoya, and Kazuyoshi Harada. "Dynamic Analysis of Cage Behavior in a Tapered Roller Bearing." Journal of Tribology 128, no. 3 (2006): 604–11. http://dx.doi.org/10.1115/1.2197527.

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A three-dimensional dynamic simulation analysis of a tapered roller bearing was performed using commercially available software. Without cage pocket shape simplification, the dynamic motion of the cage and rollers was calculated in six degrees of freedom. The motion of the cage and rollers was measured experimentally to verify the analysis. Under all axially loaded conditions, cage whirl was analytically predicted and experimentally confirmed. Whirl amplitude increased as the inner-ring rotational speed and axial-load magnitude increased. The maximum whirl amplitude reached the radial clearanc

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16

Savickas, Arnas, Rimantas Stonkus, Eugenijus Jurkonis, and Igor Iljin. "Assessment of the Condition of Anilox Rollers." Coatings 11, no. 11 (2021): 1301. http://dx.doi.org/10.3390/coatings11111301.

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To produce high-quality prints using flexographic printing technology, it is important, among other factors, how accurately and consistently the ink is delivered to the printing plate, and, from there, onto the printed material. This function is performed by anilox rollers. The aim of this research is to investigate the condition of anilox rollers in printing houses in the Baltic states. The study evaluated the wear and cell clogging of anilox rollers. The dependency of clogging on the cell size, as well as the dependency of wear on the cell size (i.e., change in cell volume) and quantity of d

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17

Chen, De Sheng, and Nong Fen Pan. "An Adaptive Loading Mechanism Based on Logarithmic Spiral Profile Connection for Planetary Traction Drives." Applied Mechanics and Materials 44-47 (December 2010): 2331–35. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2331.

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A cylindrical roller planetary traction drive was developed. It comprises a sun roller, three planetary rollers, an outer ring, a stationary carrier and an input shaft. The sun roller is hollow, and is connected through three logarithmic spiral profiles to the input shaft. As the input shaft rotates relative to the sun roller, a wedging action takes place between the input shaft and the sun roller; this makes the sun roller generate a certain amount of elastic deformation, so an appreciable amount of contact load is generated between the sun roller and the planetary roller. The greater the inp

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18

Umashankar, Darshan, D. S. Thakshak, Deekshith J. Nayaka, Shivakumar R. Hiremath, and R. D. Suhas. "Molybdenum powder coating on steel substrate to study three body wear resistance." IOP Conference Series: Materials Science and Engineering 1291, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1757-899x/1291/1/012012.

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Abstract Steel rollers are most commonly used in conveyor system across different industries like mining and construction. In the conveyor rollers used in mining industry, the steel specimen of the roller is in continuous contact with another metal of the same or different material rolling and sliding on that surface. In this motion of the roller, the third body i.e., the sand, grits and dust of various sizes may be entrapped in the interface of the roller material. The third body induced causes the wear due to its abrading action. To reduce this abrading action, a layer of molybdenum coating

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19

Kornecki, Ted S. "Influence of Recurrent Rolling/Crimping on Cover Crop Termination, Soil Strength and Yield in No-Till Cotton." AgriEngineering 2, no. 4 (2020): 631–48. http://dx.doi.org/10.3390/agriengineering2040042.

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Rollers/crimpers have been used to terminate cover crops typically with supplemental herbicide application to speed-up termination. Due to environmental concerns, there is a need to reduce herbicide use. In the Southern USA, the cash crop is typically planted three weeks after a rolled cover crop reaches more than 90% kill rate which eliminates competition with the cash crop for water and nutrients. A three-year replicated field experiment was initiated in the fall of 2014 to determine the effects of recurring rolling by experimental rollers/crimpers in terminating a cereal rye cover crop in c

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20

Xu, Daping, Yingxin Yang, and Qiming Cheng. "Theoretical and Experimental Research on the Floating-Sleeve Bearing Applied in Roller-Cone Bit." Shock and Vibration 2019 (March 26, 2019): 1–11. http://dx.doi.org/10.1155/2019/9719750.

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In oil and gas drilling, the roller-cone bit and the hybrid bit configured with roller cones are two commonly used rock-breaking tools; however, service lives of the bits are limited by the sliding bearings therein. In order to improve the performance and reliability of the bearing in the roller cone, a novel bearing with a floating sleeve is researched in this paper. Firstly, motion characteristics of the bearing are researched, and motion relations between the elements in the bearing are analyzed, respectively. Then, on the basis of the motion relations, three motion statuses of the float sl

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21

Ivanović, Gradimir, Radivoje Mitrovic, and Dragan Jovanovic. "Reliability of Transportation Belt Rollers Used in Surface Coal Digging." Advanced Materials Research 633 (January 2013): 312–21. http://dx.doi.org/10.4028/www.scientific.net/amr.633.312.

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Transport of ground and coal at the surface coal dig in Kostolac, Serbia, is done using transportation belts (3 - 5 kilometres in length) using the systems of BTR (Bagger-Transporter-Remover) and BTM (Bagger-Transporter-Mill). The transporter belt during circular movement is suspended on carry-rollers (during transport of weight) and on support-rollers (without weight). Two or three carry-rollers, or three support-rollers make a garland. Garlands (5 carry and 3 supporting) are built into a section and they enable the movement of belt over them. The number of sections depends on the transportat

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22

Zhang, Xiao Hang, Yan Pei Liao, Da Bing Lai, and Yi Lan Zhang. "The Design and Application of the Platen Roller Pressure Regulating Device of PROTOS1-8 Cigarette Machine." Advanced Materials Research 904 (March 2014): 465–68. http://dx.doi.org/10.4028/www.scientific.net/amr.904.465.

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If the wear and the replace frequency of rubber platen rollers of PROTOS1-8 Cigarette Machine can be reduce, easily lead to the stable of the force of paper feed and reducing the time of maintenance and spare parts consumption. However, there is no a new device for adjusting pressure of platen rollers. To solve this problem, a new type of device for adjusting pressure of platen rollers is designed. The three movable reference wheels used to test and adjust the gap instead of the reference plane. Application results shows that using the new device can effectively solve the excessive wear of the

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23

Мarmut, Іhоr, Vitalii Kashkanov, and Volodymyr Zuiev. "Theoretical studies of the force interaction of a three-axle vehicle with a stand with single rollers." Journal of Mechanical Engineering and Transport 14, no. 2 (2022): 52–61. http://dx.doi.org/10.31649/2413-4503-2021-14-2-52-61.

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The article discusses the issues of modeling conditions for obtaining diagnostic information about complex objects. Checking the braking and traction properties of three-axle trucks on a roller stand is considered as an example. As shown by many studies, in particular, which were carried out at the Department of Technical Operation and Service of Automobiles of the KhNADU (HADI), inertial stands provide more reliable information about the technical condition of the car. Such stands allow you to reproduce the real speed and thermal conditions of the brakes. To improve the accuracy of diagnosing

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24

Watanabe, Katsumi, Tsutomu Kawakatsu, and Shouichi Nakao. "Kinematic and Static Analyses of Tripod Constant Velocity Joints of the Spherical End Spider Type." Journal of Mechanical Design 127, no. 6 (2005): 1137–44. http://dx.doi.org/10.1115/1.1909205.

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The closed-loop equations of three cylindrical rollers, the spider of three spherical ends, and the housing of the tripod constant velocity joints are deduced as the spatial mechanism. They are solved for prescribed positions of its input, and output shafts and relative motion characteristics of components are made clear. Moreover, a procedure is established for solving, simultaneously, the set of conditional equations with respect to forces and moments acting on three cylindrical rollers, the spider, and the housing, for any values of friction coefficients between cylindrical rollers and its

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25

Asha, G., K. K. Navya, T. P. Rajesh, and Palatty Allesh Sinu. "Roller dung beetles of dung piles suggest habitats are alike, but that of guarding pitfall traps suggest habitats are different." Journal of Tropical Ecology 37, no. 5 (2021): 209–13. http://dx.doi.org/10.1017/s0266467421000225.

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AbstractRoller dung beetles play a pivotal role in the nutrient distribution in soil and secondary dispersal of seeds. Dung beetles are sampled either using a dung-baited pitfall trap or an exposed dung pile on the ground. While the former method is useful for a rapid survey of dung beetles, information on the ecology and behaviour of dung beetles can be lost, which the latter method provides, but underestimates species diversity due to its inefficiency in trapping rollers. Efficiency of a new method for sampling rollers—installing guarding pitfall traps around dung piles—is assessed in three

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26

Kornecki, Ted S., Francisco J. Arriaga, and Andrew J. Price. "Roller Type and Operating Speed Effects on Rye Termination Rates, Soil Moisture, and Yield of Sweet Corn in a No-till System." HortScience 47, no. 2 (2012): 217–23. http://dx.doi.org/10.21273/hortsci.47.2.217.

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A field experiment was conducted in Cullman, AL, to evaluate the effects of three different rollers/crimpers on the termination of a rye (Secale cereale L) winter cover crop, soil moisture, and yield of sweet corn (Zea mays saccharata L.) in a no-till system. The following roller types were tested: a straight bar roller, a smooth roller with crimper, and a two-stage roller. These rollers were tested at operating speeds of 3.2 km·h−1 and 6.4 km·h−1. The three rollers/crimpers were compared with a smooth drum roller (no crimping bars) plus glyphosate applied at rate 1.0 kg·ha−1 used as a control

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27

Li, Dongjie, Shuqi Shang, Xiaoning He, et al. "Experiments and Analysis of a Peanut Semi-Feeding Picking Mechanism Based on the JKR Model." Agriculture 12, no. 9 (2022): 1418. http://dx.doi.org/10.3390/agriculture12091418.

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When peanuts are harvested, the high rate of pod crush and pods leakage are the main problems in the current peanut fruit picking process. Optimized peanut picking rollers help to improve peanut harvesting efficiency. This paper investigates the fruit picking system of a three-monopoly, six-row semi-feeding peanut combine harvester, in order to reduce the rate of crush and leakage of peanut pods during the picking process. Firstly, this article specifies the structure and basic parameters of peanut picking pairs of rollers. Secondly, this paper combines JKR (Johnson-Kendall-Roberts) model theo

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28

Kimura, Kenji, Yuki Shigyo, and Kazuo Ishii. "Roller Arrangement Problem of Omnidirectional Mobil Robot Adapted Three Omni Rollers." Proceedings of International Conference on Artificial Life and Robotics 28 (February 9, 2023): 493–96. http://dx.doi.org/10.5954/icarob.2023.os20-7.

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29

Ma, Jin Hong, Bin Tao, and Xiao Han Yao. "The Simulation of Rolling Process of Wire with Y-Type Roller." Applied Mechanics and Materials 602-605 (August 2014): 709–12. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.709.

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Y-Type rolling mill with three roller is a new kind of wire mill.The three-dimensional models of rolling are established by Pro/E. Based on the finite element analysis software ANSYS/LS-DYNA, the rolling process of wire by Y-type rollers is simulated. The rolling piece movement is analysed. Stress and strain of Y-type roller are also analysed.

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30

Bagus Kencana Surya and Listiyono Listiyono. "Pengaruh Variasi Spring Plat dan Massa Roller Terhadap Torsi dan FC Pada Motor 150 cc." Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2, no. 4 (2024): 131–43. http://dx.doi.org/10.61132/mars.v2i4.242.

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In Indonesia, there are two types of motorcycle transmissions: manual and automatic. Users prefer automatic transmissions due to convenience and fuel efficiency. Automatic transmissions, such as CVT, CVT utilizes force for smooth and continuous gear ratio changes. CVT has disadvantages because unlike manual motors that have greater torque, especially on motorbikes that are three years old or more, such as poor acceleration at low to medium revolutions and wasteful fuel. This study aims to determine how the effect of adding spring plate and roller mass variations on torque and fuel consumption.

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31

Shin, Woojoo, Myungsung Kim, Taehyun Lee, Dongwoo Kang, JaeWon Shim, and Yongjin Kim. "Investigation of friction coefficient to improve traction condition in R2R transport system." AIP Advances 13, no. 1 (2023): 015210. http://dx.doi.org/10.1063/5.0131670.

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In a roll-to-roll (R2R) system, the roller’s traction force for precision transportation is crucial for the commercialization of printed electronic devices. Moreover, greater traction force of the roller can prevent several issues, such as slippage, wrinkles, sagging, and air entrainment, which occur because of insufficient traction force. The wrap angle, tension, and friction coefficient between the roller and the transporting film are key factors for achieving greater traction force in an R2R transport system. However, design of the wrap angle and tension are limited by the film damage and c

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32

Tobar-Subía-Contento, Luz M., Anthony Mandow, and Jesús M. Gómez-de-Gabriel. "Open On-Limb Robot Locomotion Mechanism with Spherical Rollers and Diameter Adaptation." Machines 12, no. 7 (2024): 455. http://dx.doi.org/10.3390/machines12070455.

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The rapid development of wearable technologies is increasing research interest in on-body robotics, where relocatable robots can serve as haptic interfaces, support healthcare measurements, or assist with daily activities. However, on-body mobile robotics poses challenges in aspects such as stable locomotion and control. This article proposes a novel small robot design for moving on human limbs that consists of an open grasping mechanism with a spring linkage, where one side holds a pivoting differential drive base (PDDB) with two spherical rollers, and the other side holds an actuated roller

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33

Zheng, H., Y. Y. Wang, and K. P. Quek. "A Refined Numerical Simulation on Dynamic Behavior of Roller Chain Drives." Shock and Vibration 11, no. 5-6 (2004): 573–84. http://dx.doi.org/10.1155/2004/548172.

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A refined numerical analysis of the dynamic behavior of roller chain drives is performed considering the roller assembly as a three-layer structure with mechanical clearance between each two of the mechanical components. Instead of using analytical method, explicit finite element technique is utilized for modeling and simulating the dynamic behavior of chain drives. The complete standard geometry of sprockets and all components of chain links are used in the developed model with minor geometry simplification. A primary goal is to achieve a more complete understanding of the dynamic behavior of

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34

Östensen, J. O., H. Åström, and E. Höglund. "Analysis of a Grease-Lubricated Roller Bearing under Arctic Conditions." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 209, no. 3 (1995): 213–20. http://dx.doi.org/10.1243/pime_proc_1995_209_427_02.

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This paper summarizes measurements of starting torque and motion of the rollers in a roller bearing during start-up at a temperature of − 30°C. The bearing was lubricated with three different greases and the tests were carried out after a running-in procedure at + 20 °C. The results were compared with measurements obtained at +20°C and with results from one base oil at +20°C. A model for the roller motion was also built and simulations of the roller motion were compared with the measurements. Independent of temperature and lubricant the rollers rolled in the loaded zone and slipped, more or le

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35

Wu, Zhaoyun, Tao Jin, Xiaoxia Liu, et al. "Research on the Wear State Detection and Identification Method of Huller Rollers Based on Point Cloud Data." Coatings 14, no. 9 (2024): 1209. http://dx.doi.org/10.3390/coatings14091209.

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Throughout the huller shelling process, the rubber rollers progressively deteriorate. The velocity of the rubber rollers decreases as the distance between the rollers rises. These modifications significantly influence the rate at which rice hulling occurs. Hence, the implementation of real-time online detection is crucial for maintaining the operational efficiency of the huller. Currently, the prevailing inspection methods include manual inspection, 2D vision inspection, deep learning methods, and machine vision methods. Nevertheless, these conventional techniques lack the ability to provide d

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36

Wu, Yingsi, Xiangming La, Xuan Zhao, Fei Liu, and Jianguo Yan. "Design and Performance Testing of Seed Potato Cutting Machine with Posture Adjustment." Agriculture 15, no. 7 (2025): 732. https://doi.org/10.3390/agriculture15070732.

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In China, potatoes are predominantly cultivated using the tuber piece planting method. During the cutting process, it is essential to divide seed potatoes into tuber pieces based on the distribution of their bud eyes, ensuring that each tuber piece contains one to two bud eyes. These tuber pieces are subsequently sown into the soil. Currently, the preparation of potato tuber pieces relies heavily on manual labor, which presents challenges such as inefficiency and high operational costs. To address these issues, a seed potato cutting machine capable of posture adjustment, cutting, and spraying

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Li, Yun Feng. "Static Load Capacity of Three-Row Roller Slewing Bearing Considering Clearances." Applied Mechanics and Materials 52-54 (March 2011): 562–67. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.562.

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A calculation method of static load capacity for three-row roller slewing bearing considering clearances was proposed. The statics models of the slewing bearing in the radial direction and the axial direction were established respectively. By solving the equilibrium equations of the models, the rolling element loads were calculated. Based on the load distribution of the rollers, the static load capacity of the bearing was calculated and the influences of the clearances on it were researched. Results show that slight negative axial clearance is favorable for the static load capacity of the bear

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Horng, T. L., and S. H. Ju. "Stiffness of an arbitrarily crowned roller compressed between two plates." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 217, no. 5 (2003): 375–84. http://dx.doi.org/10.1177/135065010321700503.

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This paper derives a stiffness equation for the arbitrarily crowned roller compressed between two plates. The roller is first divided into three parts: two crowned parts and one cylindrical part. The superposition method is introduced to obtain the roller stiffness. Three-dimensional finite element analyses were used to validate the accuracy of the stiffness equation, in which rollers with circular, quadratic, cubic, fourth-order power and exponential profiles were analysed. Comparisons with finite element results indicate that the accuracy of the stiffness equation derived in this paper is ac

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ESTEVADEORDAL, JORDI, and STANLEY J. KLEIS. "Influence of vortex-pairing location on the three-dimensional evolution of plane mixing layers." Journal of Fluid Mechanics 462 (July 10, 2002): 43–77. http://dx.doi.org/10.1017/s0022112002008546.

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Detailed three-dimensional measurements of the first vortex pairing of a large plane mixing layer reveal excitation of several three-dimensional instability modes. Time evolution in three-dimensional space (x, y, z, t) shows how the two-dimensional rollers become three-dimensional as they approach each other and that the linear growth of at least two instability waves leads to a spanwise periodic pairing. The results are based on phase-locked measurements made in three-dimensional spatial grids, with a mesh spacing of 8.5% of the fundamental instability wavelength. Spanwise-uniform, periodic a

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Xiao, Hong, Pu Wang, Bing Yi, et al. "A Numerical and Experimental Study on the Solidification Structure of Fe–Cr–Ni Steel Slab Casting by Roller Electromagnetic Stirring." Metals 11, no. 1 (2020): 6. http://dx.doi.org/10.3390/met11010006.

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We present a segmented coupling model for slab casting by roller electromagnetic stirring (R-EMS) of electromagnetic, flow, heat transfer, and solidification behavior based on magnetohydrodynamics and solidification theory. A three-dimensional (3-D) segmented coupling model that included electromagnetic, flow, and heat transfer elements was established using Ansoft Maxwell and ANSYS Fluent software. The effects of the roller sleeve, magnetic shielding ring, coil, core, molten steel, and air domain on the electromagnetic, thermal and flow fields were studied numerically. The accuracy of the mod

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Wang, Li Qin, Zhen Huan Ye, and Le Gu. "The Effect of Roller Profile Modification on Roller Bearing Performance." Advanced Materials Research 230-232 (May 2011): 1210–15. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.1210.

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According to roller profile modification method, several commonly used modified rollers were selected into the bearing dynamic analysis combined with dynamic model of bearing. As the three types of modified roller an example, simulation program was established to analyze the load distribution of loaded roller under the working conditions of upright loading and offset loading of bearing, respectively. The effects of modified roller on bearing dynamic parameters were discussed. The results provided optimal direction for bearing selection and design under different working conditions.

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Felhös, David, Karoly Váradi, and Klaus Friedrich. "Wear Analysis of Functionally Gradient Composite Materials by FE Modelling of Microhardness Measurements and Wear Tests." Materials Science Forum 537-538 (February 2007): 519–26. http://dx.doi.org/10.4028/www.scientific.net/msf.537-538.519.

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Rollers of three different material structures were examined: rollers consisting of pure EP resin; homogeneous EP/SiC composite rollers containing 5 vol.% SiC; and EP/SiC composite rollers with functionally gradient (FG) material structure. Wear tests were performed on the rollers. The wear tests showed that rollers of gradient structure are the most wear-resistant of all. Microhardness measurements were performed on the materials of the three different rollers. SEM images were made of the surface of wear traces. In order to get to know better the effect of SiC reinforcement particles on the w

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Pei, Zeguang, and Ge Chen. "Numerical investigation on the flow field of a modified vortex spinning system for producing core-spun yarns." Textile Research Journal 89, no. 19-20 (2019): 4028–45. http://dx.doi.org/10.1177/0040517519826927.

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A modified vortex spinning technology, which produces core-spun yarns by means of a tangentially injected swirling airflow, is of great prospect in view of its production rate and yarn structure. In this paper, a numerical study based on computational fluid dynamics is presented to investigate the characteristics of the flow field of this system. In the simulation, the effect of the rotating front rollers on the flow field is taken into consideration. Flow characteristics inside the spinning nozzle, flow field of the front rollers, and streamline patterns have been revealed. The results show t

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Zheng, Zhen Hua, Bao Yu Wang, and Zheng Huan Hu. "Study on Roller Profile for Cam Forming by Cross Wedge Rolling." Applied Mechanics and Materials 217-219 (November 2012): 1713–18. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1713.

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Based on the motion relation between rollers and work piece during cross wedge rolling (CWR) process, roller profile equations for cam forming were studied. A three-dimensional entity model of the roller was established using the profile equations. Process of cam forming by CWR was simulated by DEFORM-3D. The FEM data was used to analyze dimensional accuracy of the formed cam. Results demonstrate that the equations can be used in roller design for cam rolling.

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45

Kirchman, Jeremy J., Shannon J. Hackett, Steven M. Goodman, John M. Bates, and R. Prum. "Phylogeny and Systematics of Ground Rollers (Brachypteraciidae) of Madagascar." Auk 118, no. 4 (2001): 849–63. http://dx.doi.org/10.1093/auk/118.4.849.

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Abstract We studied relationships of five extant members of the endemic Malagasy family Brachypteraciidae, the ground rollers, using several mitochondrial genes (cytochrome-b, NADH dehydrogenase 2, 12S ribosomal RNA, and cytochrome oxidase I). As outgroups, we used other coraciiforms including the Cuckoo Roller (Family Leptosomatidae, Leptosomus discolor), several true rollers (Corcaciidae) and a tody (Todidae). Partial sequences of the Long-tailed Ground Roller (Uratelornis chimaera) were obtained from toe pad samples taken off museum specimens. For a combined data set of all genes, Kimura tw

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Liu, Wen Ping, and Pei Qi Wang. "A Numerical Simulation of Hot Rolling Process of H-Beams." Applied Mechanics and Materials 263-266 (December 2012): 670–73. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.670.

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To estimate the effect of roller deformation on the workpiece during the rolling process of H-beams, it is essential to consider the force exerted on the rollers and the deformation thereof. For this purpose, a three-dimension thermo-mechanical coupling model has been built with the finite element analytical package ABAQUS to simulate the hot rolling process of H-beams. In particular, the simulation is conducted under the assumption that the rollers are elastic and rolling torque imposed unilaterally, which agrees with the practical rolling conditions. Noting the results of FEM simulation, the

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Wang, H., T. F. Conry, and C. Cusano. "Stack-Up Forces for Normal and Abnormal Operating Conditions in a Railroad Roller Bearing Assembly." Journal of Mechanical Design 120, no. 4 (1998): 707–13. http://dx.doi.org/10.1115/1.2829335.

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Stack-up force distributions are obtained for normal and abnormal operating conditions in a class F (6 1/2 × 12) railroad tapered roller bearing-axle assembly for various friction coefficients, press-fits and cap screw preloads. Three conditions that affect the stack-up force distribution are considered: a steady-state normal-operating temperature distribution, a steady-state temperature distribution resulting from a stuck brake or a jammed outboard roller, and a transient temperature distribution due to multiple jammed outboard rollers. The steady-state normal or abnormal operating temperatur

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Zare, H. K., and R. E. Baddour. "Three-dimensional study of spatial submerged hydraulic jump." Canadian Journal of Civil Engineering 34, no. 9 (2007): 1140–48. http://dx.doi.org/10.1139/l07-041.

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A three-dimensional (3D) study of spatial submerged hydraulic jumps (SSHJs) was carried out using a physical model for Froude numbers Fr1 = 2.00 and 3.75 and width ratios α = 0.20 and 0.33. Three orthogonal components of the velocity field were obtained with an acoustic Doppler velocimeter (ADV). The 3D velocity field has indicated that the jump consisted of a central jet-like flow, close to the channel bottom, surrounded by vertical and horizontal circulations (rollers). The circulation was predominantly in vertical planes in the channel central region of the flow and in horizontal planes clo

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Нилов, Владимир Александрович, Владимир Алексееич Жулай, Виталий Леонидович Тюнин, and Алексей Николаевич Щиенко. "HIGHWAY IMPACT STUDY OF THE EFFICIENCY OF COATING AND BASE COMPACTION WITH THREE-ROLLER TANDEM COMPACTORS." Housing and utilities infrastructure, no. 3(18) (September 29, 2021): 114–22. http://dx.doi.org/10.36622/vstu.2021.18.3.012.

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Приведено технико-экономическое обоснование повышения эффективности уплотнения покрытий и оснований за счет использования трехвальцевых дорожных катков тандемного типа. Выполнены расчеты, показывающие возможность последовательного увеличения вертикального нагружения вальцев катка по мере возрастания прочности уплотняемой поверхности в широких пределах (до 1,1 веса серийного катка) за счет применения дополнительной управляемой секции. Установлена возможность уменьшения числа проходов катка за счет увеличения количества его вальцев. Проведен технико-экономический расчет, подтверждающий целесообр

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Salo, Vasyl, Serhii Leshchenko, and Dmytro Bohatyrov. "The Influence of the Parameters of a Chopping Rotor for Plant Residues on the Reliability of the Technological Process." National Interagency Scientific and Technical Collection of Works. Design, Production and Exploitation of Agricultural Machines, no. 51 (2021): 70–77. http://dx.doi.org/10.32515/2414-3820.2021.51.70-77.

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The paper presents the assessment of the parameters of a chopping rotor for shredding plant residues for the reliability of the technological process. The general objective of the work is to substantiate the design and experimental identification of rational parameters of crimp-rollers of plant residues based on the condition of preventing clogging of the inter-knife space with plant-soil mass. The existing designs of crimp-rollers of plant residues are analyzed and the interrelation of certain constructive and technological parameters of shredders on qualitative indicators of their operation

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