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Journal articles on the topic 'Smooth shaft'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Wu, Jiwei, Shian Chao Tay, and Alexander Y. Shin. "The Effect of Screw Design on Union Rates in Scaphoid Nonunions." Hand Surgery 20, no. 02 (2015): 273–79. http://dx.doi.org/10.1142/s0218810415500239.

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Background: The purpose of this study is to compare the outcome of the conical fully threaded headless screw to that of a smooth shaft headless screw in a series of scaphoid nonunions requiring screw fixation to determine if screw design had an influence on union rates. Methods: We retrospectively reviewed 104 cases of surgically treated scaphoid nonunions. After eliminating cases with our exclusion criteria, the study cohort had 40 cases for analysis. A comparison and analysis of union rates was undertaken between the fully threaded Acutrak 2 mini screw and the smooth shaft Herbert screw. Res

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2

Minowa, Toshimichi, Hiroshi Kimura, Junichi Ishii, and Masahiko Ibamoto. "Smooth Gear Shift Control System of Automatic Transmission Using Estimated Output Shaft Torque." Transactions of the Japan Society of Mechanical Engineers Series C 61, no. 591 (1995): 4334–38. http://dx.doi.org/10.1299/kikaic.61.4334.

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3

Melnik, V. A. "Calculation of radial forces in smooth shaft slot seals." Chemical and Petroleum Engineering 47, no. 9-10 (2012): 603–8. http://dx.doi.org/10.1007/s10556-012-9517-3.

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4

Alawneh, Ahmed Shlash, Abdallah I. Husein Malkawi, and Husein Al-Deeky. "Tension tests on smooth and rough model piles in dry sand." Canadian Geotechnical Journal 36, no. 4 (1999): 746–53. http://dx.doi.org/10.1139/t98-104.

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In order to delineate the significant variables affecting the ultimate uplift shaft resistance of a pile in dry sand, a testing program comprising 64 pullout tests was conducted on open- and closed-ended rough and smooth model piles of two sizes (41 and 61 mm outside diameter). The model piles were installed in medium dense and dense sand to an embedded depth of 0.8 m using two methods of pile placement, static jacking and driving. A rigid steel box measuring 1.1 × 1.1 × 1.3 m was used as a sand container. The results obtained from this study indicated that pile placement method, initial sand

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5

Chauhan, Nathi Ram, Arhantika Khera, Shubhi Agarwal, Mehak Bagri, and Aditi Aggarwal. "Effect of Nanoparticle on the Performance of Water Lubricated Journal Bearing." IOP Conference Series: Materials Science and Engineering 1228, no. 1 (2022): 012032. http://dx.doi.org/10.1088/1757-899x/1228/1/012032.

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Abstract Journal bearings have widespread use in machinery with rotating shafts. Hydrodynamic journal bearings have lubricating fluid present between shaft and bearing to reduce friction and allow smooth operation. The lubricating fluid develops pressure when bearing is in operation and this pressure is used to carry load on the shaft. The commonly used lubricants in the industry are petroleum based synthetic oils. To do away with the disposal issues and toxicity regarding synthetic oils, water is used as the lubricating fluid for this study. The effect of adding nanoparticles to water is stud

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Ramadhan, Fachri Rizieq, and Marno Marno. "Process for Making Shafts for Locking Saws." JETISH: Journal of Education Technology Information Social Sciences and Health 3, no. 2 (2024): 1437–45. http://dx.doi.org/10.57235/jetish.v3i2.3385.

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The process of making a saw locking shaft is a crucial step in ensuring the reliability and safety of the saw machine. The crux of the problem at hand is the need for a locking shaft with sufficient strength and resistance to secure the saw blade in position during operation. The aim of this research is to design and produce saw locking shafts using a lathe and milling machine. This research was carried out in a local lathe workshop, which has facilities for turning and milling processes. The method used in this research was experimental using ST 37 steel as the basic material. The manufacturi

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7

Chen, Xiang, Guo Fang Li, Lin Yan Zhang, and Shuang Liu. "Study of Shock Control of Gear-Shifting in Automatic Transmission." Advanced Materials Research 490-495 (March 2012): 890–94. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.890.

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A new smooth shifting control is worked out in response to problems existed in gear-shift control of the AG4 automatic transmission, and a new pattern of oil pressure change for the engaging elements during the transition stage is formulated. Dynamic motion equations for the AG4 automatic transmission are established using simulated lever system. The simulation test is done of the 2nd-3rd (3rd-2nd) gear-shift phase in AG4 automatic transmission by means of MATLAB/Simulink software. The result of which shows the change in amplitude of the output shaft angular acceleration and that of the degree

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8

Childs, D., D. Elrod, and K. Hale. "Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients; Comparisons to Labyrinth and Smooth Configurations." Journal of Tribology 111, no. 2 (1989): 293–300. http://dx.doi.org/10.1115/1.3261911.

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Test results are presented for leakage and rotordynamic coefficients for seven honeycomb seals. All seals have the same radius, length, and clearance; however, the cell depths and diameters are varied. Rotordynamic data, which are presented, consist of the direct and cross-coupled stiffness coefficients and the direct damping coefficients. The rotordynamic-coefficient data show a considerable sensitivity to changes in cell dimensions; however, no clear trends are identifiable. Comparisons of test data for the honeycomb seals with labyrinth and smooth annular seals shows the honeycomb seal had

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9

Hendrawan, Andi. "ANALISA PENYEBAB KEAUSAN POROS BALING BALING KAPAL." Saintara: Jurnal Ilmiah Ilmu-Ilmu Maritim 4, no. 1 (2020): 1–8. https://doi.org/10.52475/saintara.v4i1.45.

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Ship propellers are very important because in general ships moving in the medium of water with a certain speed, it will experience a drag (resistance) that isopposite to the direction of motion of the ship. The amount of drag that occurs must be able to be overcome by the thrust of the ship (thrust) resulting from thework of the ship's propulsion. Other causes of bale blast wear: Breaking of propeller shaft seal, Propeller shaft lubricating oil circulation is not smooth,Unbalanced propeller shaft, so to prevent damage is needed periodic maintenance and repair so that the propeller shaft can wo

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10

Cheung, K. Y. S., and A. Daadbin. "Torsional Vibration of Rotating Shafts." International Journal of Mechanical Engineering Education 22, no. 2 (1994): 113–22. http://dx.doi.org/10.1177/030641909402200207.

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In rotating shafts where large power is transmitted, it is desired to achieve smooth transmission and avoid any torsional vibration in the system. These vibrations result from torsional flexibilities due to shaft stiffnesses and carried inertias. To demonstrate this phenomenon a user-friendly computer program is developed as a result of a final-year project to analyse different multi-degree torsional vibratory systems. The computer program together with the corresponding experimental rig makes the students aware of the torsional resonances in the rotating shafts and demonstrates their effect.

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11

Bergmans, L., J. Van Cleynenbreugel, M. Beullens, M. Wevers, B. Van Meerbeek, and P. Lambrechts. "Smooth flexible versus active tapered shaft design using NiTi rotary instruments." International Endodontic Journal 35, no. 10 (2002): 820–28. http://dx.doi.org/10.1046/j.1365-2591.2002.00574.x.

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12

GONZALEZ, CHRIS M., ROBERT E. BRANNIGAN, TROY BERVIG, et al. "Protein and Gene Expression of Nitric Oxide Synthase Isoforms I and III in the Rat Penile Shaft." Journal of Andrology 22, no. 1 (2001): 54–61. http://dx.doi.org/10.1002/j.1939-4640.2001.tb02153.x.

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ABSTRACT: Nitric oxide synthase (NOS) plays a key role in penile smooth muscle relaxation through the regulation of nitric oxide (NO). NO is a major neurotransmitter in the autonomic nervous system, and alteration of its activity has been implicated in erectile dysfunction. The objectives of this study were twofold: 1) to demonstrate and localize the NOS protein isoforms I and III in the normal rat penis, and 2) to identify and quantitate NOS I and III gene expression in the normal rat penis. The gene and protein product of NOS isoforms I and III are expressed in rat penile tissue. Protein exp

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13

Yarullin, Munir G., Ilnar A. Galiullin, and Marat R. Mingazov. "Analysis and Technology of the Bricard Linkage Kinematic Parameters Comparative Experiments." Applied Mechanics and Materials 788 (August 2015): 295–300. http://dx.doi.org/10.4028/www.scientific.net/amm.788.295.

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The article considers kinematic parameters of the 6R Bricard linkage characteristic point obtained analytically. Computer simulation of this mechanism resulted in diagrams of changes in the special orientation of the coordinate system of the characteristic point and a projection of its velocities to the basic coordinates system. In addition, we developed a prototype model for experimental studies. The difference between data obtained using the experimental model and the data obtained by computer analysis is less than 5%. This article describes the components of the experimental model. Using a

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14

Darques, Kevin, Abdelmounaïm Tounzi, Yvonnick Le-menach, and Karim Beddek. "Investigation on the shaft voltage generation of large synchronous turboalternators." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 5 (2020): 1145–56. http://dx.doi.org/10.1108/compel-01-2020-0044.

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Purpose This paper aims to go deeper on the analysis of the shaft voltage of large turbogenerators. The main interest of this study is the investigation process developed. Design/methodology/approach The analysis of the shaft voltage because of several defects is based on a two-dimensional (2D) finite element modeling. This 2D finite element model is used to determine the shaft voltage because of eccentricities or rotor short-circuit. Findings Dynamic eccentricities and rotor short circuit do not have an inherent impact on the shaft voltage. Circulating currents in the stator winding because o

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15

Zhou, Qing Fu, Lu Jie Wang, Wan Ren Wang, and Hai Liang Wang. "Smooth Blasting Construction Technology of Urban Shallow Subway Tunnel." Applied Mechanics and Materials 723 (January 2015): 285–89. http://dx.doi.org/10.4028/www.scientific.net/amm.723.285.

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The article combined the existing theory of smooth blasting and the in situ construction experience. From the viewpoint of smooth blasting in the practical engineering application, a research was initiated on how to put smooth blasting construction technology of urban shallow subway tunnel into use, based on the example of the construction of the small mileage segment of the left tunnel line of 2# shaft of Hai-pi tunnel interval of Qingdao Metro Line 2, which provides the reference for other section construction of Qingdao subway.

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16

Hashimoto, H. "Theoretical Analysis of Externally Pressurized Porous Foil Bearings—Part I: In the Case of Smooth Surface Porous Shaft." Journal of Tribology 117, no. 1 (1995): 103–11. http://dx.doi.org/10.1115/1.2830583.

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In this paper, the theoretical analysis for the hybrid performance of externally pressurized foil bearings with a hollow porous shaft is described. In the analysis, in order to save computation time and to improve the convergency of solutions, the two-dimensional modified Reynolds equation considering the added flow through hollow porous shaft is reduced to the ordinary differential equation by expanding the film pressure to the Fourier series with respect to the axial coordinate. The reduced Reynolds equation and the equilibrium equation for the perfectly flexible foil are solved iteratively

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17

Ghanem, Mohamed M. "Failure Analysis of Condensate Pump Shaft in Power Plant." Key Engineering Materials 786 (October 2018): 314–18. http://dx.doi.org/10.4028/www.scientific.net/kem.786.314.

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Failure analysis of condensate pump shaft used in power generation plant was investigated. After 5 years of operation, the pump shaft fabricated from free-machining 416 martensitic stainless steel was suddenly ruptured into two parts. Detailed study was carried out using VT, PT together with microstructure investigation using optical and scanning electron microscope (SEM), fractography, chemical analysis and hardness testing to find out the cause of shaft failure. Failure analysis investigation revealed that the shaft was failed by torsion fatigue. Rupture was initiated from the sharp edge of

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18

Jaśkowski, Wojciech, Mateusz Jabłoński, Małgorzata Ulmaniec, and Krzysztof Paraszczuk. "The use of two-axis high precision inclination sensors in determining headframe deflection." E3S Web of Conferences 36 (2018): 02003. http://dx.doi.org/10.1051/e3sconf/20183602003.

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Reliability of transport equipment in the shaft depends, among other things, on the accuracy of the vertical foundation of the headframe together with elements of the hoisting equipment over the shaft. Any deviations beyond the installation and movement tolerances may cause incorrect or even dangerous operation of the hoisting equipment in the shaft. Therefore the headframe is subjected to periodic inventory measurements, which prevent the movement in the shaft and the smooth operation of the whole underground mine. The Wieliczka Salt Mine developed a project for the installation of precision

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19

Xi, JunQiang, JianMin Meng, and HuiYan Chen. "Research on Shifting Control Method of Positive Independent Mechanical Split Path Transmission for the Starting Gear." Mathematical Problems in Engineering 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/191574.

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To realize a smooth and quick shift of the positive independent mechanical split path transmission (PIMSPT) equipped with automatic shifting control system (ASCS), the research on the feasibility of improving shift quality by dynamic and cooperative controlling engine, steering clutches, and brakes has been conducted. The shifting control method suited to starting gear of PIMSPT has been proposed. The control method is based on control parameters, such as the driving shaft speed and its derivative. The control laws of steering clutches and brakes are presented during each gear and stage of shi

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20

Pandya, Sweta, Pradnya Gaikwad, and Maitri Patel. "Gross Anatomy of Humerus of Asiatic Lion (Panthera leo persica)." Indian Journal of Veterinary Sciences & Biotechnology 19, no. 3 (2023): 22–25. http://dx.doi.org/10.48165/ijvsbt.19.3.05.

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Gir forest is the sole home of Asiatic lion. In the present study the anatomy of 4 humerus bones of Asiatic lion were studied. The humerus is long bone with spirally twisted shaft. The mean circumference of proximal extremity was 21.11 cm, while that of distal extremity was 18.00 cm. The mean length of shaft was 17.20 cm. The mean diameter of shaft from the middle was 8.62 cm. The musculo-spiral groove was wide, smooth and spiral on lateral surface of humerus. There were three fossae, olecranon fossa at caudal aspect and radial and coronoid fossae at cranial aspect of distal extremity of humer

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21

Kudish, Ilya I., Frank Kelley, and Daniel Mikrut. "Defects of the Classic Formulation of a Nonsteady EHL Problem for a Journal Bearing. New Problem Formulation." Journal of Tribology 121, no. 4 (1999): 995–1000. http://dx.doi.org/10.1115/1.2834168.

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A nonsteady problem for an elastohydrodynamically lubricated (EHL) journal bearing is considered. It is shown that under certain circumstances contact pressure and shaft normal velocity are discontinuous functions of time. The initial normal velocity of the shaft has a certain value which is predetermined by the shaft initial position and applied load. Therefore, the EHL solution cannot accommodate any different initial normal velocity of the shaft. These defects pertain to any nonsteady EHL problem in the “classic” formulation. The main goal of this paper is to propose a modified formulation

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22

Shade, W. N., and D. E. Hampshire. "An Experimental Investigation of Oil-Buffered Shaft Seal Flow Rates." Journal of Engineering for Gas Turbines and Power 107, no. 1 (1985): 170–80. http://dx.doi.org/10.1115/1.3239679.

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An experimental investigation was conducted to identify an optimum oil-buffered shaft seal for use on centrifugal compressors, with the primary objective being minimal seal oil exposure to process gases that cause seal oil degradation or are toxic. Types of seals tested included smooth bore cylindrical bushings, spiral groove cylindrical bushings, radial outward-flow face seals, and radial inward-flow face seals. The influence of shaft speed, gas pressure, seal oil differential pressure, oil bypass flow rate, and oil supply temperature on process side seal oil flow rate was determined. The inv

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23

Susilowati, S., Novel Karaman, Muchammad, B. Setyana, Fernanda Surya Irawan, and Mohammad Tauviqirrahman. "CFD Analysis of Journal Bearing by Modifying The Roughness Surface." MATEC Web of Conferences 372 (2022): 08002. http://dx.doi.org/10.1051/matecconf/202237208002.

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A journal bearing is a machine part that is used to ensure that the shaft always rotates in the opposite direction of the axis. Journal bearings are chosen because they are well-suited for use in mechanical systems that demand precision, speed, and a high load capacity. Recent years have seen an increase in research on how to improve the tribological performance of bearings by considering the design/architecture of these bearings. Numerous scientists have developed numerous methods for measuring pressure distribution, load-carrying capacity, acoustic power level, force friction, and cavitation

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24

Härtel, Markus, Loc Le Duc, Thomas Grund, Lukáš Suchý, Thomas Lampke, and Alexander Hasse. "Experimental and FE Investigation on the Influence of Impact Load on the Moment Transmission of Smooth Shaft–Hub Connections." Applied Sciences 14, no. 19 (2024): 8916. http://dx.doi.org/10.3390/app14198916.

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A well-known phenomenon in machinery systems is the easing of a blocked connection of mechanical parts after an impact hit close to the connection. Such impact hits may also arise in shaft–hub connections such as gears, crankshafts, or other parts. The objective of this study is to investigate the influence of local impact loads on the transmittable torque of smooth shaft–hub connections. In a specially designed test rig, it was demonstrated that the transmittable torque of the shaft–hub connection is reduced as a consequence of the impact, resulting in a reduction in the frictional force and

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25

Zhu, Xia, Nagatoshi Okabe, Keiji Ogi, and Manabu Takahashi. "Fatigue Strength of Shaft with Diameter Enlarged Partially by Cyclic Bending and Axial Compressive Loading." Applied Mechanics and Materials 217-219 (November 2012): 2346–50. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.2346.

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This paper experimentally and analytically investigates the fatigue strength and of mechanical damage of the processed shafts. First, we carry out rotary bending fatigue tests and investigate the fatigue strength for smooth specimens, specimen made only using cutting work, and specimens processed using a new plastic working developed originally. Secondly, we measure the Vickers hardness values to investigate strain hardening near the processed part. Finally, we simulate stress and strain distributions of the shaft during the processing using finite element method (FEM) and calculate the stress

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Yani, Endri, and Gusriwandi. "Proses Perbaikan Over Clearance pada Sleeve Bearing Steam Turbine Menggunakan TIG Babbit." Jurnal Inovasi Rekayasa Mekanikal dan Termal 2, no. 1 (2024): 55–61. https://doi.org/10.25077/inomet.1.1.55-61.2024.

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A sleeve bearing is a machine element that supports a shaft with a load, allowing the shaft's rotation or reciprocating motion to occur smoothly, safely, and with a long lifespan. Sleeve bearings also function to keep the shaft in the correct position, ensuring that the rotational motion of the shaft experiences minimal friction. Overclearance in bearings occurred due to friction and extended operational time, which degraded the bearing's performance. In this study, three stages of maintenance and repair were performed to restore the bearing's function to its original state: as received, repai

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Бородина, Марина, and Marina Borodina. "FRICTION INFLUENCE IN KINEMATIC PAIRS OF HYDROMECHANICAL CLUTCH WITH DIFFERENTIAL DRIVING GEAR UPON DYNAMICS OF ITS OPERATION." Bulletin of Bryansk state technical university 2016, no. 4 (2016): 75–82. http://dx.doi.org/10.12737/23167.

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Hydromechanical clutches with a differential driving gear can protect against sudden quickly growing shortterm overloads not related to emergency without triggering at the expense of a smooth moment increase on a shaft of the engine provided with the operation of hydroelastic elements in the hydrosystem of a clutch. The investigation of the friction influence in ki-nematic pairs of hydromechanical clutches with helical and toothed differential driving gears upon the dynamics of clutch operation during emergency triggering has shown that in a helical driving gear the kinetic friction in a splin

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28

Zeng, Xi, Luhe Zhang, Yu Tang, Zhaoyang Li, and Bingkui Chen. "Dynamic model of fine-pitch gear pair considering multi-clearance coupling." Journal of Physics: Conference Series 2338, no. 1 (2022): 012080. http://dx.doi.org/10.1088/1742-6596/2338/1/012080.

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Abstract In this paper, the parallel shaft fine-pitch involute plastic-powder metallurgy engagement spur gear pair produced according to the recommended backlash value of DIN standard is taken as research object. The coupling between the backlash and the bearing radial clearance is considered. And the expression of the dynamic backlash is derived. A three-degree-of-freedom two-state dynamic mathematical model of the parallel shaft gear transmission system is established. The time-domain curves of gear displacement, velocity, engagement force and dynamic backlash are obtained. The results of ma

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29

Tohasan, Achmad, Muhamad Yusup Ependi, and Andri Hermawan. "Design of Horizontal Mixer Capacity of 15 Kilograms." Mestro: Jurnal Teknik Mesin dan Elektro 3, no. 01 (2021): 23–30. http://dx.doi.org/10.47685/mestro.v4i01.383.

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Some home industries, such as the bakery industry, in their production still use manual methods or human labor to mix the bread dough until it is smooth. The disadvantages of using the manual method are that production takes a long time, requires a lot of energy, requires more than one person to mix all the ingredients for the bread dough. So research is needed on the design of a tool that can facilitate the production of bread, namely a mixer. The purpose of this study is to design a horizontal mixer machine and to design a horizontal dough mixer machine with a capacity of 15. This research i

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30

Zhang, Shu Ping, Xin Zhi Liu, Gang Yang, and Hou Lei Zhang. "Drying Characteristics of Fine-Particle Lignite in Paddle Dryers." Defect and Diffusion Forum 366 (April 2016): 192–98. http://dx.doi.org/10.4028/www.scientific.net/ddf.366.192.

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Drying is an important way to improve the quality of lignite with high moisture. In this paper, a single-shaft paddle dryer experimental system was built to investigate the drying characteristics of fine-particle lignite with diameter 0-5mm. The experimental results show that with the increasing in shaft rotation speed the flow rate of lignite increases linearly approximately and the residence time decreases correspondingly. Increasing the inclination angle of dryer frame helps increase the flow rate. Both shaft rotation speed and heating source (heat transfer oil) temperature have significant

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Al-Falahat, Ala'a M. "Implementation of the dynamic balancing approach of a rotating composite hollow shaft." EUREKA: Physics and Engineering, no. 2 (March 31, 2022): 68–73. https://doi.org/10.21303/2461-4262.2022.002336.

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Balancing is essential in rotating machinery, which is widely employed in many technical sectors, particularly in high-speed rotor-bearing systems. The mass balancing method of the hollow shaft manufactured of composite materials is investigated in this study over the whole speed range of the rotor. The main goal of the balancing technique is to generate a smooth-running machine by removing the commonality imbalance mass through the use of compensating mass unbalance. As a result, MATLAB code is created to produce a functioning mathematical model of the rotor-bearing system. The unbalanced rot

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Marasová, Daniela, Stanislav Lukáč, Ľubomír Ambriško, and Michal Cehlár. "Selection of the Optimal Alternative of the Deposit Opening Applying the Decision-Making Process." Applied Mechanics and Materials 683 (October 2014): 196–201. http://dx.doi.org/10.4028/www.scientific.net/amm.683.196.

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The reason for opening deeper mining horizon is to preserve the volume of extraction, a smooth transition to a new horizon with the intention of mining state of existing stocks. In the proposal of opening will be maintain the current direction of transport (extraction of mineral, haulage of materials, lower) through bank to the existing plant equipment. Alternative proposals for solutions of opening new horizon will be limited to the range of main opening workings (hoisting shaft), including relevant hoisting equipment and objects immediately fasten on it. Other deeper horizon equipment outsid

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Qiu, Li Jun, Jia Yang, and Su Ying Xu. "The Analysis and Design of Turbocharger Thrust Bearing." Advanced Materials Research 308-310 (August 2011): 1333–36. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1333.

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Turbocharger turbine shaft thrust bearing is the role of high-speed rotating turbine to withstand the axial force generated by the turbine shaft and a part of the axial position. Fixed on the intermediate thrust bearing on the two sides and both sides of the ring, respectively, relative sliding. Sliding contact surface produces a condition of dynamic pressure oil film structure and shape of the oil wedge. Bearing the sides of the structural design of the oil wedge slot and forming a design to solve the main content. Bearing thrust bearing stiffness and rotation in the process of stress state a

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34

Lahjouji, I., M. El Gadari, B. El Fahime, and M. Radouani. "Effect of Relative Velocity Between Rough Surfaces: Hydrodynamic Lubrication of Rotary Lip Seal." International Journal of Applied Mechanics and Engineering 22, no. 2 (2017): 321–32. http://dx.doi.org/10.1515/ijame-2017-0019.

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Abstract Since the sixties, most of numerical studies that model the rotary lip seal lubrication have been restricted by assuming that one of the two opposing surfaces is smooth: either the lip or the shaft. This hypothesis, although it is verified only for a shaft roughness ten times smaller than that of the seal, is the best solution to avoid the transient term “∂h/∂t” in the deterministic approach. Thus, the subject of the present study is twofold. The first part validates the current hydrodynamic model with the international literature by assuming the asperities on the lip and shaft as a t

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Dong, Peng, Shengdun Zhao, Shuqin Fan, Muzhi Zhu, and Peng Zhang. "Double-rotator and valve plate distribution radial piston pump." Assembly Automation 40, no. 2 (2019): 265–71. http://dx.doi.org/10.1108/aa-12-2018-0270.

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Purpose The drive shaft and the distribution shaft of a traditional radial piston pump are in a cantilever state. To solve this problem, this paper aims to present a radial piston pump with through shaft driving and valve plate distribution. Design/methodology/approach The working principle of the pump is discussed in detail. In this radial piston pump, valve plate distribution parts are designed to distribute oil to the piston chambers, and the distribution shaft is replaced. A bearing is installed between the stator and rotator to reduce the friction. The transmission shaft is supported by t

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Duan, Jia-xi, Lin Zhang, Xue-hai Sun, Li-jun Yin, and Liang-long Da. "Smooth average properties of vibroacoustic radiation of a shaft-hull system in shallow sea." Engineering Analysis with Boundary Elements 166 (September 2024): 105825. http://dx.doi.org/10.1016/j.enganabound.2024.105825.

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37

Weber, W. "Estimation of runner side chamber behavior of Francis turbines for shaft line dynamics." IOP Conference Series: Earth and Environmental Science 1483, no. 1 (2025): 012030. https://doi.org/10.1088/1755-1315/1483/1/012030.

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Abstract The analysis of dynamic fluid behavior in runner side chambers of Francis turbines to estimate the effect on the shaft line behavior is presented. The shaft line analysis of hydropower units is carried out to ensure stable behavior of the shaft line as well as a smooth vibrational behavior. At first, mechanical stiffness and mass properties of rotating and non-rotating components of the power unit as well as oil-film properties are necessary parameters for the shaft line modelling. In hydropower, the fluid inside and around the turbine runner can also have a relevant influence on the

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Al-Falahat, Ala’a M. "Implementation of the dynamic balancing approach of a rotating composite hollow shaft." EUREKA: Physics and Engineering, no. 2 (March 31, 2022): 68–73. http://dx.doi.org/10.21303/2461-4262.2022.002336.

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Balancing is essential in rotating machinery, which is widely employed in many technical sectors, particularly in high-speed rotor-bearing systems. The mass balancing method of the hollow shaft manufactured of composite materials is investigated in this study over the whole speed range of the rotor. The main goal of the balancing technique is to generate a smooth-running machine by removing the commonality imbalance mass through the use of compensating mass unbalance. As a result, MATLAB code is created to produce a functioning mathematical model of the rotor-bearing system. The unbalanced rot

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Przybyłowicz, Piotr M. "Near-Critical Behavior of an Elastic Rotating Shaft Stabilized by Electromagnetic Actuators." International Journal of Structural Stability and Dynamics 17, no. 05 (2017): 1740013. http://dx.doi.org/10.1142/s0219455417400132.

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The paper is concerned with the problem of dynamic stability of a rotating elastic shaft supported on rolling bearing at both ends. The material of the shaft is characterized by some dissipative properties which leads to dynamic loss of stability at a certain angular velocity called the critical rotation speed. The shaft is equipped with a system of two perpendicularly arranged pairs of electromagnets which exerts some attractive force upon the shaft in two transverse direction. Presence of such forces, phenomenon of magnetic induction as well as resistance in the electric circuits substantial

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Lee, Kyu Sun, Hong Gyu Jeon, Sung Oug Cho, and Young Ze Lee. "Friction and Wear of Flange and Shaft in Compressor under the Environments of PAG Oil and Carbon Dioxide as a Refrigerant." Key Engineering Materials 345-346 (August 2007): 1059–62. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.1059.

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In order to protect the global environment, especially on the point of the greenhouse effect, carbon dioxide should be used as a natural refrigerant. Because new compressors with CO2 are going to be operated under the high pressure, the interaction between sliding surfaces in the compressor becomes very important. To develop new compressor, especially rotary type, the friction and wear characteristics of sliding surfaces were very important. In this paper, the surface interactions between a shaft and a flange, which were one of the contacting parts in compressor, were evaluated. The frictional

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Steiros, K. "Transient torque in stirred tanks." Journal of Fluid Mechanics 831 (October 13, 2017): 554–78. http://dx.doi.org/10.1017/jfm.2017.652.

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The transient dynamics of stirred tanks whose impeller speed undergoes smooth or step changes is investigated. First, a low-order model is developed, linking the impeller torque with the ‘extent’ of the solid-body rotation in the tank, derived from an angular momentum balance in a control volume around the impeller. Utilisation of this model enables the prediction of the torque ‘spike’ appearing after an impulsive change of the shaft speed, and of the torque evolution during a quasi-steady transition. For the case of a small impulsive change in the shaft speed, a characteristic spin-up time is

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Bao, Er, Hong Ying Hu, and De Yong Liu. "The Theory and Synthesis of High Effect Flywheel with Variable Equivalent Mass Moment of Inertia." Advanced Materials Research 199-200 (February 2011): 225–31. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.225.

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To reduce the angular velocity fluctuation of the input shaft to a machine, we deduced that a machine under the combined action of the inertia and the load may keep running smoothly if the equivalent kinetic energy (EKE) of the machine is constant during its operation. Furthermore, we introduced a novel type of flywheels with variable equivalent mass moment of inertia (VEMMoI) and without fixed connection with the input shaft to the machine. The kinetic energy fluctuation of the flywheel is used to dynamically decrease the EKE fluctuation of the original machine, thereby realizing smooth machi

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Wang, Xiao Yi, Yong Qiang Zhang, Hui Xing Wang, Yin Ping Dong, Zhi Zhen Qiu, and Fu Qiang Chen. "Research of Local Constraint for Simplified Half-Rotating Mechanism." Applied Mechanics and Materials 826 (February 2016): 35–39. http://dx.doi.org/10.4028/www.scientific.net/amm.826.35.

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In order to meet the requirements of the bionic flying, traditional Half-Rotating Mechanism (HRM) should be simplified because its structure was too complex and heavy. The design idea of simplified HRM was firstly introduced in this paper. Simplified HRM could be achieved by adding a local constraint made of positioning slider and shaft with groove in the slider-crank mechanism. To make sure the movement of simplified HRM was smooth and reliable, relative motion characteristics of positioning slider in groove of shaft had been analyzed and the curve of shaft with groove had been designed. The

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Bhat, Shivarama, Muhammad Asif, Dinesh Sosalagere Manjegowda, Shetty Radhakrishna, and Shivarama C. H. "Rhomboid fossa and mid shaft circumference of the clavicle - anthropological study in North Karnataka population." Journal of Health and Allied Sciences NU 05, no. 03 (2015): 047–51. http://dx.doi.org/10.1055/s-0040-1703912.

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AbstractThe rhomboid fossa of clavicle was studied globally by forensic experts and anthropologists to determine the age and sex. This study was done on samples of human clavicles from North Karnataka of South India to determine the sexual dimorphism which is of anthropological, forensic and clinical importance. In this study mid shaft circumference, morphology of rhomboid fossa of clavicle was analysed. The incidences of rhomboid fossa of depressed and elevated types are seen more in males and smooth and flat types are seen mainly in female clavicles. This study also showed relative degree of

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Canete Portillo, S., A. Theriault, D. F. Sanchez, A. L. Cubilla, L. Celias, and M. Fernandez-Nestosa. "Histological anatomical levels of penile shaft. A histochemical evaluation of 15 cases." American Journal of Clinical Pathology 160, Supplement_1 (2023): S46—S47. http://dx.doi.org/10.1093/ajcp/aqad150.104.

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Abstract Introduction/Objective Penile carcinomas (PeCa) arising in the skin of the shaft are rare. Staging systems for PeCa are based on tumor invasion of anatomical levels designed for tumors arising in the glans and foreskin but not for those primary of the shaft. There is scant information about anatomical levels in the shaft. The objective of this study was to evaluate and describe anatomical levels of the shaft with emphasis of the fascias, using histochemical stains. Methods/Case Report Sections of penile mid shaft from 15 penectomies with PeCa from 2000-2015 were evaluated. H&E, tr

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Subair, Aysar Hassan, and Ala Nasir Aljorany. "Shaft Resistance of Long (Flexible) Piles Considering Strength Degradation." Journal of Engineering 27, no. 3 (2021): 54–66. http://dx.doi.org/10.31026/j.eng.2021.03.04.

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Soil-structure frictional resistance is an important parameter in the design of many foundation systems. The soil-structure interface area is responsible for load transferring from the structure to the surrounding soil. The mobilized shaft resistance of axially loaded, long slender pile embedded in dense, dry sand is experimentally and numerically analyzed when subjected to pullout force. Experimental setup including an instrumented model pile while the finite element method is used as a numerical analysis tool. The hypoplasticity model is used to model the soil adjacent to and surrounding the

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Hu, Yijian, Guoyou Zhao, Xiaozhong Du, Chuanchuan Ma, Leifeng Tuo, and Zhibing Chu. "Study on the dynamic characteristics of planetary gear transmission mechanism of metal cold rolling mill." Mechanics & Industry 25 (2024): 20. http://dx.doi.org/10.1051/meca/2024014.

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Using the parametric modelling feature in Solidworks software, a three-dimensional solid model of a planetary gearbox with linear reciprocating motion of the output shaft was constructed. By conducting theoretical calculations related to the kinematics of the transmission system and combining Adams virtual prototyping simulation technology, a dynamic simulation model of the planetary gear transmission mechanism was established to analyse the motion laws and dynamic characteristics. The simulation results were compared and analysed against the theoretical calculation results, and they showed go

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Duan, Jie, Jiyu Li, Yundong Zhu, Hongtao Zhang, Yuting Liu, and Yanan Zhao. "Design of an Imaging Optical System for Large-Sized Stepped Shaft Diameter Detection." Applied Sciences 14, no. 8 (2024): 3423. http://dx.doi.org/10.3390/app14083423.

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Addressing the prevalent issues of low accuracy, low efficiency, and poor image quality in online diameter measurement of large-sized stepped shafts, this study introduces a novel method based on a symmetrical dual-telecentric optical path utilizing dual CCDs, specifically designed for step shafts with diameters ranging from 600 mm to 800 mm. By developing and optimizing an imaging system grounded in the object-image dual-telecentric optical path principle and employing Zemax software for comprehensive analysis and optimization, this research achieves significant findings. The system’s Airy di

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Perez, Alejandra, Adam Carl Nolte, Giuseppe Maurici, et al. "The “Tri-Glide” Technique: A Case Report on a Novel Intraoperative Approach for Removal of Retained and Encrusted Ureteral Stents." Case Reports in Urology 2022 (February 3, 2022): 1–4. http://dx.doi.org/10.1155/2022/5708348.

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Background. Retained ureteral stents can result in significant morbidity and can be surgically challenging to urologists. A multimodal approach is often necessary for removal, potentially including retrograde and antegrade procedures performed over multiple anesthetic sessions. We describe the novel “Tri-Glide” technique for treating retained stents, particularly those with stent shaft encrustation prohibiting safe removal. Case Presentation. Two patients with nephrolithiasis and retained, encrusted ureteral stents were managed with the “Tri-Glide” technique. Patient #1 was a 58-year-old man w

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Guo, Zhengyang, and Lijun Deng. "Field behaviour of screw micropiles subjected to axial loading in cohesive soils." Canadian Geotechnical Journal 55, no. 1 (2018): 34–44. http://dx.doi.org/10.1139/cgj-2017-0109.

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Field tests of full-scale screw micropiles with a diameter varying from 76 to 114 mm and a length varying from 1.6 to 3 m were undertaken to investigate the axial pile capacities, load-transfer mechanism, and end installation torques of the piles in cohesive soils. Forty tests were performed on piles subjected to axial compressive and tensile loads. Six tests were instrumented with strain gauges on the pile shaft. Results showed the piles reached the limit state before the displacement exceeded 10% of the shaft diameter. The majority of axial load was transferred to the threaded segment. The a

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