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Journal articles on the topic 'Motor-axial bearing'

Author: Grafiati

Published: 4 June 2025

Last updated: 23 June 2025

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1

Voronin, Serhii, Volodymyr Stefanov, Sergii Komar, Andrii Savchenko, and Oleksandr Hubin. "IMPACT OF LOADS ON LOCOMOTIVE MOTOR AXLE BEARINGS ON THE CONDITIONS OF FORMATION OF OIL FILM ON FRICTION SURFACES." Collection of Scientific Works of the Ukrainian State University of Railway Transport, no. 208 (June 28, 2024): 172–80. http://dx.doi.org/10.18664/1994-7852.208.2024.308611.

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During the active operation of locomotives, a significant portion of failures (up to 20 %) is attributed to the malfunction of motor-axial bearings. This is due to the imperfection of the lubrication system of the motor-axial bearings, the proper functioning of which largely depends on various factors such as climatic conditions, the level of wear of lubricating oil, and lubrication devices, among others. There is a need to improve the existing lubrication systems for motor-axial sliding bearings. One of the methods to address this issue involves examining the factors influencing the lubrication process of the friction surfaces of motor-axial bearings and the conditions of lubricant material supply. The article provides calculations of the loading forces on the motor-axial bearings, their action vectors, and analyzes the impact of these parameters on the ability to form an oil film on the friction surfaces of motor-axial bearings. To determine the magnitude of the load, technical specifications of the locomotive were used, and the relationship between power usage and locomotive speed was analyzed. The study involved an analysis of recent publications regarding the generation of contact pressure force between the contact surfaces of friction pairs, the magnitude of which exceeds permissible limits, considered one of the primary factors leading to bearing failure. Additionally, the existing bearing lubrication system used on the locomotive was analyzed, its shortcomings were identified, and methods for addressing these issues were discussed. The calculations were performed for the 2TE116 locomotive with traction electric motors ED-118B, based on the operational characteristics of the locomotive in the speed range of 0-80 km/h.

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2

Zhang, Chi, and Guang Zhou Zhao. "Design and FEM Analysis of a High Efficiency Axial-Flux Brushless DC Motor for Flywheel System." Key Engineering Materials 480-481 (June 2011): 1099–104. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.1099.

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A high efficiency axial-flux brushless DC motor assisted by self axial magnetic bearing and used in flywheel energy storage system is proposed in this paper. In this design, the rotor with composite rim acts as the flywheel of the system and is sandwiched between two disk type stators which are made of amorphous metal to reduce iron losses. The dual-stator machine combines the functions of axial flux brushless DC motor and axial magnetic bearing to rotate the flywheel-rotor and levitate it in vertical orientation. The other four degrees of freedom in radial directions are constrained by ceramic ball bearings for simple operation, high efficiency and long life span. Optimized design approaches are employed to achieve low losses, and high power density. Three-dimensional FEM analyses are implemented, and the analysis results support the feasibility of the proposed motor.

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3

Ueno, Satoshi, Masaya Tomoda, and Changan Jiang. "Development of an axial-flux self-bearing motor using two permanent magnet attractive type passive magnetic bearings." International Journal of Applied Electromagnetics and Mechanics 64, no. 1-4 (2020): 827–33. http://dx.doi.org/10.3233/jae-209395.

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This paper introduces an axial-flux self-bearing motor (ASBM) using two permanent magnet attractive type passive magnetic bearings (PMBs). The ASBM provides both functions of a disc motor and thrust magnetic bearing, and controls motor torque and axial force by single rotational magnetic flux. The PMB consists of a cylindrical permanent magnet and an iron shaft with conical edge, and it supports the rotor in radial directions. This motor has a simple structure and control system, and it is possible to reduce the size and cost. In this paper, the structure and control method are introduced, and the results of levitation and rotation tests whose non-contact rotation speed was achieved up to 1,500 rpm are shown.

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4

Ablyalimov, Oleg, Gabit Bakyt, Nodirjon Tursunov, Utkir Safarov, and Yermek Baubekov. "Research of heat transfer processes in motor-axial bearings of traction electric motors of diesel locomotives." Vibroengineering Procedia 58 (May 15, 2025): 264–70. https://doi.org/10.21595/vp.2025.24955.

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Original calculation schemes of the motor-axle bearing and the distribution of heat flows in the process of heat removal from the surface layer of lubricant to the axle journal of the wheel pair and to the motor-axle bearing liner are proposed, taking into account its middle layer. In order to substantiate the maximum amount of heat released in the motor-axle bearings of a freight diesel locomotive of the 2TE10 series and caused by the action of friction forces in the zone of contact their with the journals of the axles of the wheel pairs, taking into account the theoretical foundations of heat transfer and the accepted assumptions in the specified calculation schemes, analytical dependencies were obtained to determine the quantities characterizing heat removal from the mentioned motor-axial bearings using three flows. As a result of implementing the proposed analytical dependencies and performing numerical calculations, it was proved that the operation of the studied motor-axial bearings is carried out in the semi-fluid friction mode and at negative temperatures of the external (atmospheric) air, their normal operation is not ensured due to the low proportion of heat removal by the lubricant, which does not exceed 1.5 percent, and therefore, this leads motor-axial bearings to premature wear and failure, and thereby reduces the operational reliability of the wheel-motor unit of diesel locomotives.

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5

SUMINO, Masayuki, and Satoshi UENO. "Tilt control with axial self-bearing motor." Transactions of the JSME (in Japanese) 80, no. 815 (2014): DR0207. http://dx.doi.org/10.1299/transjsme.2014dr0207.

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6

Okada, Yohji, Toru Masuzawa, Ken-Ichi Matsuda, et al. "Axial Type Self-Bearing Motor for Axial Flow Blood Pump." Artificial Organs 27, no. 10 (2003): 887–91. http://dx.doi.org/10.1046/j.1525-1594.2003.00030.x.

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7

Yu, Hai Bo, and Kun Wang. "Development of High Speed Motor with Magnetic Bearing." Advanced Materials Research 846-847 (November 2013): 44–47. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.44.

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In order to in-depth study the magnetic suspension molecular pump technology, a 4kW high speed magnetic motor was firstly developed. The magnetic motor includes 2 radial magnetic bearings, 2 axial magnetic bearing with five degrees of freedom. The wind abrasion and magnetic flux distribution in stators and the gap between the stator and the rotor were analyzed. Then the high speed magnetic motor prototype was introduced in detail. At last, the basic experiment result was present and the conclusions were given.

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8

YAMASHIRO, Naoto, Yohji OKADA, and Kenichi MATSUDA. "Consequent Type Axial Self-Bearing Motor and Application." Proceedings of Ibaraki District Conference 2003 (2003): 181–82. http://dx.doi.org/10.1299/jsmeibaraki.2003.181.

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9

Luu, Phuong Thi, Ji-Young Lee, Ji-Heon Lee, and Byung-Chul Woo. "Design and Analysis of a Permanent Magnet Synchronous Motor Considering Axial Asymmetric Position of Rotor to Stator." Energies 12, no. 24 (2019): 4816. http://dx.doi.org/10.3390/en12244816.

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This paper presents the design and analysis of a permanent magnet synchronous motor (PMSM) considering the axial asymmetric PM overhang for a smart actuator (SA) application such as an isokinetic exercise machine. This structure helps take advantage of the motor space effectively and makes the system small in size and light in weight. However, two drawbacks related to the performance of motor occur when the axial asymmetric PM overhang is used: (1) an axial attractive force (AAF) is created, which can produce motor noise and vibration; (2) the torque of motor is reduced compared with the symmetric PM overhang model. We used five steps to solve these problems. Firstly, the AAF according to the variation in axial position of the rotor to the stator was calculated and analyzed. Secondly, the torque was calculated under the same conditions to confirm that the system requirements were satisfied. The three-dimensional finite element analysis was used to determine the AAF and torque. Thirdly, the appropriate axial position of the rotor to the stator was suggested considering the analysis results and space inside the housing. Next, the commercial bearing type was chosen so that the total force acting on the bearing was below the bearing load limit to ensure motor stability. Finally, a prototype model was made and tested to confirm the accuracy of the analytical results. Through this study, by using the axial asymmetric PM overhang, the total length of SA was reduced by 5mm and the performance of motor was guaranteed.

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10

OHMORI, Kunihiro, Yohji OKADA, Ken-ichi MATSUDA, and Seung-Jong KIM. "706 Design of An Axial-type Self-bearing Motor for Axial Pump." Proceedings of Ibaraki District Conference 2001 (2001): 177–78. http://dx.doi.org/10.1299/jsmeibaraki.2001.177.

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11

Dietz, Daniel, and Andreas Binder. "Bearingless PM-synchronous machine with axial active magnetic bearing fed by zero-sequence current." e & i Elektrotechnik und Informationstechnik 138, no. 2 (2021): 62–69. http://dx.doi.org/10.1007/s00502-021-00867-4.

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AbstractA novel inverter supply for bearingless PM-synchronous motors with magnetic suspension allows the reduction of the number of power electronic switches. Hence, all six motional degrees of freedom of bearingless AC machines may be controlled via 3-phase inverter topologies. In this paper, instead of a bearingless motor consisting of two half motors, one bearingless motor with an additional radial active magnetic bearing is treated. Bearingless machines with cylindrical rotors in contrast to double cone rotors generate – apart from the electromagnetic torque – only radial magnetic forces. Hence, an axial magnetic bearing is used.For this bearing, there is no need for a feeding converter bridge as the bearing coil is fed by the zero-sequence current of the feeding 3-phase inverters. The bearing coil is placed between the two star points of the motor winding. The zero-sequence current amplitude is adjusted by the 3-phase inverters via pulse width modulation. The feasibility of this kind of axial position control is proven by simulation as well as with an experiment with a 1 kW prototype motor up to 60000 min−1.

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12

YAMASHIRO, Naoto, Yohji OKADA, and Kenichi MATSUDA. "526 Consequent Type Axial Self-Bearing Motor and Application." Proceedings of the Dynamics & Design Conference 2004 (2004): _526–1_—_526–6_. http://dx.doi.org/10.1299/jsmedmc.2004._526-1_.

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13

Okada, Yohji, Kumiko Shimizu, and Satoshi Ueno. "Control of Hybrid (HB) Type Magnetic Bearings with Axial GAP Combined Motor-Bearing." IFAC Proceedings Volumes 33, no. 26 (2000): 437–42. http://dx.doi.org/10.1016/s1474-6670(17)39183-8.

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14

UENO, Satoshi, Masato KASHIWABARA, and Changan JIANG. "Axial Gap Self-Bearing Motor with Permanent Magnet Attractive Type Passive Magnetic Bearings." Proceedings of the Dynamics & Design Conference 2018 (2018): 508. http://dx.doi.org/10.1299/jsmedmc.2018.508.

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15

Zhu, Guoqing, and Jian Luo. "Unbalanced Magnetic Pull Calculation in Ironless Axial Flux Motors." Energies 18, no. 9 (2025): 2397. https://doi.org/10.3390/en18092397.

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Axial flux motors have gained widespread attention in the field of electric vehicles. The stator may exert a unilateral axial force on the dual rotors under uneven air gaps. The unbalanced magnetic pull can influence the production and processing of the motor, leading to issues such as vibrations, bearing degradation, reduced lifespan, and torque reduction attributed to the bearings. Accurate evaluation of the unilateral magnetic pull can reduce costs associated with bearing protection. For dual-rotor motors, the axial forces of the rotors act in opposite directions with nearly equal magnitudes, resulting in the catastrophic cancellation of unbalanced magnetic pull calculations. A similar phenomenon may occur between coils, introducing computational errors. To avoid these errors, the stator was selected as the computational target for unilateral axial force calculations. The integration domain was defined to encompass the entire air region containing all windings, rather than summing individual force components. This merged integration approach was mathematically validated through the Maxwell stress tensor method. Finally, the obtained stator axial force closely matched the rotor axial force in magnitude, demonstrating the accuracy of the proposed method.

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16

Blatnický, Miroslav, Ján Dižo, Denis Molnár, and Vadym Ishchuk. "Návrh elektrického mechanizmu otáčania výložníka stĺpového žeriava pre manipuláciu s kalovými čerpadlami." Technológ 15, no. 2 (2023): 27–31. http://dx.doi.org/10.26552/tech.c.2023.2.3.

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The article is a continuation of the issue of the technical solution of the hinge for handling sludge pumps in the Jaslovské Bohunice nuclear power plant. The main goal is the design of the electric jib rotating mechanism. It was based on the previous proposal for placing the boom consisting of a dimensional calculation of the new support column and the proposal for placing the boom on this column. The save consisted of two bonds. The upper support of the boom was solved using a rolling bearing fixed in the upper part of the column. The bottom bearing contains an axial plain bearing and a fixed gear as part of the rotating mechanism. In the next step, it is necessary to design the attachment of the selected electric motor with a planetary gearbox and a pinion for this construction. The priority in the design will be mainly to observe the axial distance of the gears, but also to consider the mounting method given by the manufacturer and the torque generated by the engine. A holder in which the motor is attached and then attached to the structure will be designed. Thanks to this, the axial distance will be fulfilled. In addition to supporting the motor, the holder also serves as a radial bearing lock, preventing the bearing from being accidentally pulled out. The result of calculations and designs will be 2D diagrams and 3D visualization of the new construction.

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17

BRECHER, CHRISTIAN, STEPHAN NEUS, MARCUS GAERTNER, et al. "NEW BEARING STEEL FOR HIGH-SPEED APPLICATIONS." MM Science Journal 2021, no. 6 (2021): 5334–39. http://dx.doi.org/10.17973/mmsj.2021_12_2021129.

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The requirements for speed suitability and fatigue strength of motor spindle bearings are constantly increasing. These challenges can be met by further developing the spindle bearings, e.g. by using higher-performance bearing steels. In the following, the experimental investigation results of a spindle bearing made of a new raceway steel tested on a high-speed rolling bearing test rig are presented. Spindle bearings of the type 7008 (hybrid execution) were tested in an endurance run at a rotational speed of 46 krpm and 3 kN axial load. The operating behaviour was validated based on the bearing outer ring temperature and the vibration behaviour. Microscope analysis of the raceways after the test shows that the new steel has good resistance to micropitting and surface fatigue. The calculated contact pressures, wear parameter and lifetime for the bearings in the tests show that the performance limits of spindle bearings are significantly higher than initially assumed.

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18

Okada, Y., N. Yamashiro, K. Ohmori, et al. "Mixed Flow Artificial Heart Pump With Axial Self-Bearing Motor." IEEE/ASME Transactions on Mechatronics 10, no. 6 (2005): 658–65. http://dx.doi.org/10.1109/tmech.2005.859827.

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19

UENO, Satoshi, Masaaki SAKAGAMI, and Shigeo TANAKA. "1418 Development of Small Pump using Axial Self-bearing Motor." Proceedings of Conference of Kansai Branch 2007.82 (2007): _14–18_. http://dx.doi.org/10.1299/jsmekansai.2007.82._14-18_.

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20

WATANABE, Ryo, Satoshi UENO, and Changan JIANG. "Axial Gap Self-Bearing Motor with Four Concentrated Stator Coils." Proceedings of the Symposium on the Motion and Vibration Control 2017.15 (2017): A20. http://dx.doi.org/10.1299/jsmemovic.2017.15.a20.

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21

Piper, George E., John M. Watkins, and Owen G. Thorp. "Active Control of Axial-flow Fan Noise Using Magnetic Bearings." Journal of Vibration and Control 11, no. 9 (2005): 1221–32. http://dx.doi.org/10.1177/1077546305057261.

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In this paper we present a novel approach to reducing blade-rate noise of axial-flow fans. By using magnetic bearings as a noise control actuator, it is possible to collocate the anti-noise source with the disturbance noise source. This approach allows for global noise reduction throughout the sound field. A DC motor connected to a fan by a short rigid shaft was used to demonstrate this approach. The shaft was supported in the radial and axial directions by magnetic bearings. The bearings provide position control of the shaft and fan; this position control can be used to vibrate the fan at a desired frequency and amplitude. Controlled vibration of the fan allows its use as a speaker in an active noise control scheme. Noise control was implemented on a dedicated digital signal processor using a least mean square algorithm. The output of the noise control algorithm supplies the position commands for the magnetic bearing controller. Experimental data showed that by actuating the axial thrust bearing, the noise output of a fan could be reduced by 4 dB at the error microphone, and 3 dB at points away from the error microphone.

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22

WATANABE, Ryo, Satoshi UENO, and Changan JIANG. "Control of axial force and motor torque of an axial gap self-bearing motor using two fourconcentrated-coil stators." Transactions of the JSME (in Japanese) 84, no. 865 (2018): 17–00520. http://dx.doi.org/10.1299/transjsme.17-00520.

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23

Li, Fang Yuan. "Adopting Three-Level Inverter to Solve the Bearing Fault of Roll Forming." Advanced Materials Research 328-330 (September 2011): 2125–28. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2125.

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During the roll forming factory, the front bearing of AC motor was always malfunction. The problem was that there was large axial vibration and the deterioration was in the trend of rapid development. In order to make early preparations for repairs and maintenance to determine the basis for decision-making, the motor bearings were under monitoring when running. In AC drive systems, bearings are more likely to be damaged from the highly accelerated/decelerated operation and the effects of electrical discharge machining resulting from high dv/dt, which are introduced by PWM input voltage. Multi-level inverters offer better sinusoidal voltage waveform than 2-level inverters due the fact that output voltage can be formed using more than two voltage level. This causes the THD to be lower. Switching losses are reduced because switching frequency can be lower than in 2-level inverter. According the testing data analysis, bearing had been replaced with 3-level AC inverter and maintenance of the response had been decided.

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24

Wang, Yan Shuang, and Hai Feng Zhu. "Temperature Field Analysis of Bearing." Key Engineering Materials 480-481 (June 2011): 974–79. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.974.

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Based on the quasi-static analysis and the power loss analysis, the temperature distribution is calculated by ANSYS.The different part temperatures of bearing are obtained. The influences of rotational speed, axial load and radial load on the temperature distribution are analyzed. The results reveal that axial load and rotational speed affect temperature distribution strongly. The effect of radial load is not signifcant,and the maxtemperature of bearing is at the point between balls and the inner ring. Bearings with shaft are widely used in gyro motors of aviation, aerospace, marine navigational systems. In a few applications, however, heat generated by friction can affects its performance, life and reliability, and consequently influences control precision and life of gyro motors[1]. So it’s important to evaluate heat generation of bearings with shaft for the design, manufacture and its application. A few researchers [2, 3] have analyzed the concentrated contact temperature. Their researches have been mainly focused on the temperature of contact surface. In addition, some researchers (Chinese and foreign) have calculated the temperature of bearing under the thermal network method [4, 5]. The above methods are easy to carry out, but only can the temperatures of some point be found. Compared with the thermal network method, the finite element model can get the temperature of the whole model. The temperature analysis has been pursued by some foreign and Chinese researchers under the method [6, 7]. The steady temperature field of bearing with shaft from a gyro motor is studied in the paper. The speed of ball and the temperature distribution are analyzed and studied by VC6.0++ and ANSYS. The temperature distribution under different axial load, speed of inner ring and radial load is calculated. Therefore the main effect of temperature distribution can be found.

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25

Qi, Pengyuan, Jingbo Wang, Zhe Liu, Xu Ren, and Lei Wang. "Development of auto loading device in bearing positioning lip stamping." Journal of Physics: Conference Series 2141, no. 1 (2021): 012004. http://dx.doi.org/10.1088/1742-6596/2141/1/012004.

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Abstract With the continuous development of our economy, the types and quantity of engine bearing are increasing. In order to prevent the bearing moving in the bearing pedestal, one or both ends of the bearing need to make positioning lip for axial positioning. In order to meet the needs of mass bearing production, an auto loading device for positioning lip of bearing is proposed in this paper. The horizontal conveyor belt and loading guide are used to make the blank turn to the required angle, and then the double cylinder valve and push rod motor are used to realize the time-sharing conveying and continuous loading of the blank. During the loading process, there are inclined slideway and blocking plate to avoid the collision between blanks and ensure the reliable loading bearings. Through the actual production verification, the developed device has the advantages of simple structure, low cost, fine working stability, and made great improving in the efficiency and safety for production of bearing.

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26

Okada, Y., K. Shimizu, and S. Ueno. "Vibration control of flexible rotor by inclination control magnetic bearings with axial self-bearing motor." IEEE/ASME Transactions on Mechatronics 6, no. 4 (2001): 521–24. http://dx.doi.org/10.1109/3516.974866.

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27

Nie, S. L., G. H. Huang, Y. Q. Zhu, Z. Y. Li, and Y. P. Li. "SEWHAPM: Development of a Water Hydraulic Axial Piston Motor for Underwater Tool Systems." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 219, no. 7 (2005): 639–55. http://dx.doi.org/10.1243/095440605x31409.

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Water hydraulic motor (WHM) is an important transmission component in a water hydraulic system. Because of different physicochemical properties of raw water when compared with mineral oil, the design for the WHM would be different from that for a mineral oil one. A static equilibrium-type water hydraulic axial piston motor (SEWHAPM), which is equipped with a global-moment-balanced plate valve and a hydrostatic slipper bearing with a concentric gap damper, is developed in this research. The mechanism of the global-moment-balanced plate valve is analysed to eliminate the irregular wear of the plate valve. Next, the relevant design guideline is constructed. A mathematical model of the hydrostatic slipper bearing is established, and the performance characteristics of the bearing are discussed. The theoretical analyses indicate that the load-carrying capacity of this hydrostatic slipper bearing is not correlated with system pressure, water viscosity, temperature, or rotor speed, and that the lubrication film thickness of the bearing possesses high rigidity. The fundamental principle for designing the hydrostatic slipper bearing is also derived. On the basis of a material-screening experiment, a SEWHAPM is fabricated and tested on a water hydraulic-component-performance test stand. The experimental results show that developed SEWHAPM is feasible, with its volumetric, mechanical, and total efficiencies being ∼86, 80, and 70 per cent, respectively, under a pressure of 10 MPa. The maximal output torque can reach ∼19.5Nm; the maximal speed can reach 3000 r/min. As a result of the aforementioned development, the SEWHAPM has been successfully used in an underwater tool system since 2002, and its performance has been tested, demonstrating that the developed equipment can meet the regulated requirements for its practical applications.

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28

Ai, Likun, Yiping Lu, Jiade Han, and Wenxu Suo. "Simulation of the Temperature of a Shielding Induction Motor of the Nuclear Main Pump under Different Turbulence Models." Energies 16, no. 6 (2023): 2792. http://dx.doi.org/10.3390/en16062792.

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Thermal design and the choice of turbulence models are crucial for motors. In this project, the geometrical model of the vertical shielding induction motor for a small nuclear main pump was established by SolidWorks software and the finite volume method was adopted to investigate the temperature of the motor, especially the temperatures of bearings lubricated water. To make the numerical simulation of flow and heat transfer in the rotating clearance of the shielding induction motor more accurate, the effects of four types of different two equation turbulence models on the temperature field of the shielding induction motor were studied. The results showed that different choices of turbulence models had little effect on the temperature of the winding insulation but influenced the temperature of the lower guide bearing lubricating water and the secondary cooling water outlet. The SST k-ω model showed the lowest relative error result of the temperature of the winding insulation and the bearing lubricating water in the primary loop system of the shielding induction motor. The temperature of the clearance water, the spiral tube water and the spiral groove water increased approximately linearly along the axial direction.

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29

UENO, Satoshi, Hiroya KAWAMOTO, and Changan JIANG. "Rotation Angle Estimation of Single Type Axial-flux Self-bearing Motor." Proceedings of the Dynamics & Design Conference 2020 (August 25, 2020): 527. http://dx.doi.org/10.1299/jsmedmc.2020.527.

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30

Ueno, S., and Y. Okada. "Characteristics and control of a bidirectional axial gap combined motor-bearing." IEEE/ASME Transactions on Mechatronics 5, no. 3 (2000): 310–18. http://dx.doi.org/10.1109/3516.868923.

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31

UENO, Satoshi, and Yohji OKADA. "Vector Control of an Induction Type Axial Gap Combined Motor-Bearing." Transactions of the Japan Society of Mechanical Engineers Series C 66, no. 641 (2000): 131–37. http://dx.doi.org/10.1299/kikaic.66.131.

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32

UENO, Satoshi, Ken-ichi MATSUDA, and Yohji OKADA. "131 Self-Sensing Control for an Axial Gap Combined Motor-bearing." Proceedings of the Symposium on the Motion and Vibration Control 2001.7 (2001): 118–21. http://dx.doi.org/10.1299/jsmemovic.2001.7.118.

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33

OKAMURA, Toshihiko, Satoshi UENO, Masaaki SAKAGAMI, and Shigeo TANAKA. "450 Efficiency of Small Regenerative Pump using Axial Self-Bearing Motor." Proceedings of the Dynamics & Design Conference 2009 (2009): _450–1_—_450–6_. http://dx.doi.org/10.1299/jsmedmc.2009._450-1_.

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34

Ku, C. P. Roger. "Dynamic Characteristics of Hard Disk Drive Spindle Motors—Comparison Between Ball Bearings and Hydrodynamic Bearings." Journal of Tribology 118, no. 2 (1996): 402–6. http://dx.doi.org/10.1115/1.2831316.

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Recently, many computer hard disk drive companies and spindle motor manufacturers have been looking for a substitute for ball bearings to continue making dramatic progress in increasing the capacity of data storage systems. In this paper, the frequency-forced responses of hard disk drive spindle motors supported by both ball bearings and liquid-lubricated spiral groove hearings (SGBs) were studied experimentally. It is found that both shaft rigidity and disk flexibility have great effects on the natural frequency of the spindle motor conical (rocking) mode. The high damping capacity of the SGB is able to suppress the vibration amplitudes of both motor rocking mode and the flexible disk modes. But at a very low frequency range, the SGB motors displayed a large amplitude in the axial direction vibration test. With an adequate bearing design, the SGB motors have proven their superior dynamic characteristics.

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35

Nguyen, Danh Huy, The Tai Ta, Le Minh Vu, et al. "Fractional Order Active Disturbance Rejection Control for Canned Motor Conical Active Magnetic Bearing-Supported Pumps." Inventions 8, no. 1 (2023): 15. http://dx.doi.org/10.3390/inventions8010015.

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Active magnetic bearings (AMBs) are electromagnetic mechanism systems in which non-contact bearings support a rotating shaft using attractive forces generated by electromagnets through closed-loop control. For complete support of a five degree of freedom (DOF) rotor system, most AMB structures include two radial actuators and one for the axial direction. Conical active magnetic bearings (CAMBs) is one of the development directions of conventional magnetic bearings in which the requirement of the axial bearing can be eliminated. In this paper, we propose a structure with a CAMB integrated into a canned motor pump to eliminate the need for mechanical bearings and shaft seals. However, this system necessitates a more complicated control strategy due to a significant coupling effect between rotor motion and hydrodynamic disturbances. This paper presents a fractional order active disturbance rejection control (FOADRC) including a fractional order extend state observer (FOESO) and a proportional derivative controller (PD) to track and reject lumped disturbances actively. The proposed controller achieves better performance than the integer-type ADRC and traditional PID controller. The control performance of the proposed FOADRC is illustrated in terms of very good disturbance rejection capability that is demonstrated through MATLAB/Simulink simulation results.

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Li, Wei Xiang, and Shi Jie Wang. "Axial Force Studies of ESPCP System Based on Triz Theory." Applied Mechanics and Materials 152-154 (January 2012): 866–71. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.866.

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The configuration characteristics and actual working condition of the downhole unit of existing electrical-submersible-motor driven progressing cavity pumping (ESPCP) system are analyzed in detail. Appling the methods and the main tools of Triz theory, conflicting analysis is performed for the axial bearing capacity affecting submersible depth and operational lifespan of downhole unit. The parameters of physical and technical contradictions are standardized. Appropriate principles of invention are selected through contradiction matrix analysis and a more reasonable innovation design project of the ESPCP system configuration is developed. As such, the axial bearing capacity of downhole unit has been effectively improved.

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SUMINO, Masayuki, and Satoshi UENO. "1D13 Rotation Test of a Tilt-Controlling Axial Self-Bearing Motor with Superconducting Magnetic Bearing(The 12th International Conference on Motion and Vibration Control)." Proceedings of the Symposium on the Motion and Vibration Control 2014.12 (2014): _1D13–1_—_1D13–10_. http://dx.doi.org/10.1299/jsmemovic.2014.12._1d13-1_.

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38

Novianto, Hernawan, and Sujono Sujono. "Vibration analysis for failure detection in clean water distribution pumps: A case study in an oil and gas training center." Jurnal Polimesin 23, no. 1 (2025): 110. https://doi.org/10.30811/jpl.v23i1.5959.

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The Clean Water Distribution Pump plays a crucial role in delivering clean water to consumers. Over time, increased noise levels indicate potential damage to pump components, which, if left unaddressed, can lead to severe failures and costly repairs. One of the analyzes of pump damage is vibration analysis. With vibration analysis, damage to the pump in the form of misalignment, mechanical looseness, bent shaft, bearing damage, worn gears, cavitation can be identified. The purpose of this research is to determine the characteristics of vibrations that occur in the pump, so that we can detect damage and failures that occurs and suggest maintenance action. Vibration analysis is carried out using a vibration analyzer to determine the vibration spectrum that occurs in the axial, radial and tangential directions, then analyzing the type of damage and appropriate maintenance to be carried out. The results showed that this pump indicated: extreme motor free end bearing looseness with a severity score of 99/100, serious motor free end bearing wear with a severity score of 72/100, serious motor drive end bearing looseness with a severity score of 53/100, and moderate motor drive end bearing wear with a severity score of 37/100. and based on the ISO 10816-3 standard, it is recommended that the motor free end bearing be replaced because vibration will cause damage and for the drive end bearing motor it is only recommended to operate for a short time.

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UENO, Satoshi, Ryo WATANABE, and Changan JIANG. "Reduction of axial force fluctuation of axial flux self-bearing motor using two single-phase stators." Proceedings of the Dynamics & Design Conference 2019 (2019): 524. http://dx.doi.org/10.1299/jsmedmc.2019.524.

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Osa, Masahiro, Toru Masuzawa, Ryoga Orihara, and Eisuke Tatsumi. "Performance Enhancement of a Magnetic System in a Ultra Compact 5-DOF-Controlled Self-Bearing Motor for a Rotary Pediatric Ventricular-Assist Device to Diminish Energy Input." Actuators 8, no. 2 (2019): 31. http://dx.doi.org/10.3390/act8020031.

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Research interests of compact magnetically levitated motors have been strongly increased in development of durable and biocompatible mechanical circulatory support (MCS) devices for pediatric heart disease patients. In this study, an ultra-compact axial gap type self-bearing motor with 5-degrees of freedom (DOF) active control for use in pediatric MCS devices has been developed. The motor consists of two identical motor stators and a centrifugal levitated rotor. This paper investigated a design improvement of the magnetic circuit for the self-bearing motor undergoing development in order to diminish energy input by enhancing magnetic suspension and rotation performances. Geometries of the motor were refined based on numerical calculation and three-dimensional (3D) magnetic field analysis. The modified motor can achieve higher suspension force and torque characteristics than that of a previously developed prototype motor. Oscillation of the levitated rotor was significantly suppressed by 5-DOF control over rotating speeds up to 7000 rpm with lower energy input, indicating efficacy of the design refinement of the motor.

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41

Buinosov, A. P., V. A. Vasiliev, A. S. Baitov, and A. I. Ivanov. "Bench testing of algorithms for diagnosing rolling bearings of the on-board diagnostic system and forecasting the service life of the main and auxiliary components of the MCRSU." Herald of the Ural State University of Railway Transport, no. 3 (2021): 40–49. http://dx.doi.org/10.20291/2079-0392-2021-3-40-49.

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The experimental study of bearing vibration and use of the fast Fourier transformation (FFT) as an intelligent tool for diagnosing and identifying bearing defects of motor car rolling stock units (MCRSU) is presented. It is shown that the use of new means of technical diagnostics due to the detection of malfunctions at an early stage of their development reduces the cases of violations of the normal operation of cars and rolling stock. The article presents the results of vibration diagnostics of rolling bearings on the stand, spectral characteristics are obtained for bearings with rolling body defects, internal track and external track. During the bench tests, a specially developed intelligent vibration sensor was used as a vibration sensor, consisting of a sensitive element, a vibration accelerometer, the necessary interfaces and an analogdigital converter. The radial arrangement of sensors in diagnostic systems in repair depots and on-board systems makes it difficult to diagnose defects associated with the appearance of defects under the influence of axial loads, primarily separator defects. Bench tests using intelligent sensors and cloud services on the Internet showed the possibility of creating a mobile system for diagnosing the technical condition of bearing units of motor-car rolling stock and freight car units.

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KAWAMOTO, Hiroyuki, and Hirokazu KURIOKA. "Axial Vibration of Polygonal Mirror Scanner Motor Supported by Thrust Magnetic Bearing and Radial Air Bearing." Journal of the Japan Society for Precision Engineering, Contributed Papers 71, no. 3 (2005): 404–6. http://dx.doi.org/10.2493/jspe.71.404.

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Matsuoka, Akihiro, Masayuki Sumino, Satoshi Ueno, and Tsunehiro Takeda. "Development of a high-speed motor at extremely low temperatures with an axial self-bearing motor and a superconducting magnetic bearing." International Journal of Applied Electromagnetics and Mechanics 45, no. 1-4 (2014): 859–65. http://dx.doi.org/10.3233/jae-141917.

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OKAMURA, Toshihiko, Satoshi UENO, Masaaki SAKAGAMI, and Shigeo TANAKA. "Efficiency of Small Regenerative Pump Using Axial Self-Bearing Motor(Mechanical Systems)." Transactions of the Japan Society of Mechanical Engineers Series C 76, no. 772 (2010): 3535–41. http://dx.doi.org/10.1299/kikaic.76.3535.

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Nguyen, Quang Dich, and Satoshi Ueno. "Analysis and Control of Nonsalient Permanent Magnet Axial Gap Self-Bearing Motor." IEEE Transactions on Industrial Electronics 58, no. 7 (2011): 2644–52. http://dx.doi.org/10.1109/tie.2010.2076309.

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Shen, Peng, Yiwen Wang, Yun Chen, Pengqiang Fu, Lijie Zhou, and Lijia Liu. "Hydrodynamic Bearing Structural Design of Blood Pump Based on Axial Passive Suspension Stability Analysis of Magnetic–Hydrodynamic Hybrid Suspension System." Machines 9, no. 11 (2021): 255. http://dx.doi.org/10.3390/machines9110255.

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Rotor suspension stability is one of the important performance indexes of a blood pump and the basis of determining whether the blood pump can be used in a clinic. Compared with the traditional magnetic suspension system, a single-winding, bearingless motor has the advantages of a compact structure, simple control system and low power consumption. In this pursuit, the present study aimed to envisage and design the magnetic suspension system coupled with a single-winding bearingless motor and permanent magnet bearings, establish the theoretical models of axial force and electromagnetic torque, and calculate the stiffness of the magnetic suspension system at the equilibrium point. Addressing the problem of the negative axial stiffness of the magnetic suspension system being negative, which leads to the instability of the suspension rotor, the hydrodynamic bearing structure was proposed and designed, and the critical stiffness to realize the stable suspension of the rotor was obtained based on the stability criterion of the rotor dynamics model. The optimal structural parameters of the hydrodynamic bearing are selected by integrating various factors based on the solution of the Reynolds equation and a stiffness analysis. Furthermore, the vibration experiment results proved that the blood pump rotor exhibited a good suspension stability, and the maximum offset under the impact external fluid was no more than 2 μm.

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Аsтаkhоv, V. N., E. N. Lysikоv, and P. E. Коnоvаlоv. "Estimation of modes frictions and greasing in bearing axial hanging of locomotives." Science and Transport Progress, no. 40 (April 25, 2012): 55–62. http://dx.doi.org/10.15802/stp2012/6924.

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Dependence is considered between the size of relative diametral gap and descriptions of work of the motor-axial bearing on the different rates of movement of diesel engine: by the type of the mode of greasing, thickness lubricating layer, by the coefficient of friction and intensity of wear.

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Sy Truong, Dinh, Byung-Sub Kim, and Jong-Kweon Park. "Thermally affected stiffness matrix of angular contact ball bearings in a high-speed spindle system." Advances in Mechanical Engineering 11, no. 11 (2019): 168781401988975. http://dx.doi.org/10.1177/1687814019889753.

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Bearing stiffness directly affects the dynamic characteristics in a high-speed spindle system and plays an important role in terms of manufacturing quality. We developed a new approach for predicting the thermal behavior of a high-speed spindle, calculated the thermal expansion, and generated a bearing stiffness matrix for angular contact ball bearings. The heat convection of spindle housing in air, the balls in lubricant, the spindle shaft in quiescent air, and the bearing inner ring surfaces were determined. Heat sources such as bearing friction, and the heat contributed by the built-in motor, were simulated using an analysis systems (ANSYS) steady-state thermal model. The results were imported into a static ANSYS structural model. Ball thermal expansion was calculated based on changes in the coordinates of nodal points on the ball surface. Finally, a thermally affected bearing stiffness matrix was generated by applying the Newton–Raphson technique. Decreases in the bearing radial, axial, angular, and coupling stiffness values as rotational spindle speed increased were calculated. Also, the stiffness coefficients at a specific speed increased significantly caused by the thermal effects. Finally, for validation, the bearing stiffness was compared to that calculated using an earlier thermal network approach.

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49

Kawamoto, Hiroyuki. "Axial Excitation Response of Polygonal Mirror Scanner Motor Supported by Thrust Magnetic Bearing and Radial Air Bearing." Journal of Imaging Science and Technology 50, no. 1 (2006): 111. http://dx.doi.org/10.2352/j.imagingsci.technol.(2006)50:1(111).

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50

KAWAMOTO, Hiroyuki. "Axial Transient Vibration of Polygonal Mirror Scanner Motor Supported by Thrust Magnetic Bearing and Radial Air Bearing." Transactions of the Japan Society of Mechanical Engineers Series C 64, no. 620 (1998): 1148–53. http://dx.doi.org/10.1299/kikaic.64.1148.

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