Thermal and tribological characteristics of a disc-type magnetorheological brake operated by the shear mode

Song, Wanli; Wang, Siyuan; Choi, Seung‐Bok; Wang, Na; Xiu, Shichao

doi:10.1177/1045389x18770740

Cited by 37 publications

(27 citation statements)

References 27 publications

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“…The most frequent uses of ER and MR fluids are in devices such as clutches and brakes (Olszak et al, 2016a;Raju et al, 2016;Gao et al, 2017). To achieve the assumed characteristics of clutches and brakes with ER and MR fluids, their architectures are taken into consideration by analyzing the shape and position of working space (Avraam et al, 2010), the way of producing the electric or magnetic field (Takesue et al, 2003;Böse et al, 2013;Sohn et al, 2018) as well as thermal working conditions (Chen et al, 2015;Song et al, 2018). Additionally taken into consideration are the smart fluids used for construction of clutches and brakes with ER and MR, mainly their composition (Sarkar and Hirani, 2013;Kumbhar et al, 2015;Mangal et al, 2016) and durability (Olszak et al, 2016b;Kim et al, 2017;Ziabska et al, 2017).…”

Section: Literature Studymentioning

confidence: 99%

Selection of Materials Used in Viscous Clutch With ER Fluid Working in Special Conditions

et al. 2019

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This article presents considerations regarding materials used to fabricate a hydraulic clutch with an ER fluid operating in non-standard working conditions. The hydraulic clutch was a subassembly of the device used for exerting a controlled force on the stationary object. This clutch was driven by an electric motor. The force was controlled by changing the shear stresses in the ER fluid. Shear stresses were changed in two ways: by changing the angular velocity of the electric motor and by changing the high voltage applied to the electrodes located on the driving part and the driven part of the clutch. The increase in these stresses caused an increase in the torque transmitted and an increase in the pressure force. In order to construct the clutch, mathematical models based on the Bingham model were developed, which took into account the influence of temperature and humidity on the shear stress in the ER fluid, allowing calculation of the clutch performance. In addition, numerical calculations of the temperature distribution inside the clutch were carried out using the ANSYS program because of the intense heat generation during the clutch operation. The developed mathematical models were used to optimize the clutch. The aim of the optimization was to obtain a high transmitted torque with small dimensions of the clutch, taking into account the thermal capacity of the clutch. Based on the optimization results, a prototype of a hydraulic clutch with an ER fluid was designed and made, assuming that for metal materials their anti-corrosion properties are the most important, since the presence of conductive metal oxides causes electrical breakdowns. The plastics used in the clutch prototype were mainly evaluated for insulating properties and high temperature resistance. When choosing the ER fluid, its sensitivity to temperature and humidity as well as durability were taken into account. The clutch prototype has been tested on a specially built test rig. The test results confirmed the proper selection of both construction materials and ER fluids. Based on the results of these tests, guidelines for the construction of clutches with ER fluids were formulated.

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Section: Literature Studymentioning

confidence: 99%

Selection of Materials Used in Viscous Clutch With ER Fluid Working in Special Conditions

et al. 2019

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“…However, recent advances in the mechanical, electrical and chemical characteristics of these fluids have permitted the development of novel electromechanical devices, which have been successfully utilised to optimise the function of many commercial automotive, aerospace and structural systems. The majority of these devices have employed the fluids in a simple flow [13,14] or shear mode [15,16] of operation, where the fluid flow is controlled in the former, while the fluid shearing is controlled in the latter. Furthermore, an alternative arrangement, squeeze mode, in which the fluid is subjected to compressive and tensile stresses, has been identified for small motion isolation [17,18].…”

Section: Introductionmentioning

confidence: 99%

A Novel Hydraulic Actuation System Utilizing Magnetorheological Fluids for Single-Port Laparoscopic Surgery Applications

Wahed

2020

Materials

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Single-port laparoscopic surgery (SLS), which utilizes one major incision, can deliver favorable cosmetic outcomes with fewer patient hospitalization stays and less postoperative pain. However, current SLS instruments, which are rigid and slender, have been suffering from several drawbacks, including their inability to provide the optimum articulation required to complete certain SLS tasks. This paper reports on the development of a lightweight smart hydraulic actuation system that is proposed to be embedded at selected joints along current SLS instruments, in order to enhance their adaptability with a higher level of stiffness and degrees-of-freedom. The developed smart actuation system utilizes both conventional hydraulic and magnetorheological (MR) fluid actuation technologies. Electromagnetic finite element analyses were conducted to design the electromagnetic circuit of the smart actuator. A prototype of the developed actuation system was manufactured, and its performance was assessed using a dedicated experimental arrangement, which was found to agree well with the results obtained using a Bingham plastic theoretical model. Finally, the present design of the developed smart actuation system permits an angulation of about 90° and a maximum force output in excess of 100 N, generated under a magnetic excitation of about 1.2 Tesla, which should be sufficient to resist torques of up to 500 mNm.

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“…They investigated the effect of many main factors, such as the slip power [12], input current [13] and cooling conditions [13,14,15], on the temperature variation of MRFs. Besides, Song et al [16] investigated the slip differential heat and heat dissipation of the magnetorheological brake under different working gaps. The results of the research indicated that the temperature caused by the slip differential heat is higher under the smaller working gap contrast to the larger gap [16].…”

Section: Introductionmentioning

confidence: 99%

“…Besides, Song et al [16] investigated the slip differential heat and heat dissipation of the magnetorheological brake under different working gaps. The results of the research indicated that the temperature caused by the slip differential heat is higher under the smaller working gap contrast to the larger gap [16]. Wang et al [17] studied the effect of the slip differential heat and heat dissipation on the torque of a high-torque squeezing magnetorheological brake and obtained the relationship between the torque and temperature by conducting a temperature–torque performance experiment [17].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al [17] studied the effect of the slip differential heat and heat dissipation on the torque of a high-torque squeezing magnetorheological brake and obtained the relationship between the torque and temperature by conducting a temperature–torque performance experiment [17]. However, these studies [8,9,10,11,12,13,14,15,16,17] do not analyze the slip differential heat of MRFs based on micro-structures and micro-mechanics since macro phenomenon is determined by micro nature. Meanwhile, there is no study on the effect of the slip differential heat on the structure of MRFs.…”

Section: Introductionmentioning

confidence: 99%

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Probing Slip Differential Heat of Magnetorheological Fluids Subjected to Shear Mode Operation and Its Effect on the Structure

Song

Yang

2019

Materials

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The paper probes slip differential heat of magnetorheological fluids (MRFs) subjected to shear mode operation and its effect on the structure. To begin, we present a novel model for measurement of slip differential heat to describe temperature rise of MRFs mainly caused by friction between magnetorheological particles. It includes two stages: (1) The micro-macro analysis of slip differential heat of MRFs including force, movement and heat between neighboring particles based on magnetic dipole and Hertzian contact theories, and (2) the further application to two basic disc-type and cylinder-type magnetorheological clutches combined with finite element simulations involving electromagnetic field and thermal analysis. The model takes into account the effect of each of the main influencing factors, such as the input current of excitation coil, the rotational speed difference of the clutches, the size and volume fraction of particles, the saturation magnetization of particles, and the structural size of the clutches, etc., on the slip differential heat of MRFs. Then the thermal structure analysis of MRFs comprising thermal deformation and equivalent thermal stress is carried out. Moreover, the effect of typical governing parameters on the slip power of MRFs and the influence of slip differential heat on the structure of MRFs are investigated individually. We show that such a model is effective in reflecting the temperature-slip time relation of MRFs. It is shown that the input current and the rotational speed difference have great effect on the slip power, and the slip differential heat has a certain influence on the micro-structure of MRFs.

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Thermal and tribological characteristics of a disc-type magnetorheological brake operated by the shear mode

Cited by 37 publications

References 27 publications

Selection of Materials Used in Viscous Clutch With ER Fluid Working in Special Conditions

Selection of Materials Used in Viscous Clutch With ER Fluid Working in Special Conditions

A Novel Hydraulic Actuation System Utilizing Magnetorheological Fluids for Single-Port Laparoscopic Surgery Applications

Probing Slip Differential Heat of Magnetorheological Fluids Subjected to Shear Mode Operation and Its Effect on the Structure

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