Request pdf hightorque magnetorheological fluid clutch this study focuses on the design and characterization of a radial doubleplate magnetorheological. The material removal in mrf is governed by the magnetorheological fluid which mainly consists of carbonyl iron ci, abrasives particles, carrier fluids and additives. Magnetorheological finishing mrf is a precision surface finishing technology. A magnetorheological fluid mr fluid, or mrf is a type of smart fluid in a carrier fluid, usually a type of oil. Magneto rheological fluid high torque transfer device for. Information and translations of magnetorheological in the most comprehensive dictionary definitions resource on the web. Due to the clutch s input and output have inertias of 2840 gcm2 this saturating nature of the torque transfer, the impedance and 850 gcm2, respectively.
The most modern design of the mrb has been developed in collaboration with. Khaire mechanical department, mitcoe, pune university, pune, maharashtra, india accepted 12 march 2017, available online 16 march 2017, special issue7 march 2017 abstract. Mechanical clutches and torque overload devices catalog mechanical clutches and torque overload devices catalog application considerations the proper selection and application of power transmission products and components, including the related area of product safety, is the responsibility of the customer. As for magnetorheological clutches, several solutions have been proposed. Mrf clutch magnetorheological clutch magneto hydrodynamic. But at the flip of the switch, electrons would begin to move through the circuits, creating a magnetic field in the process.
Magneto rheological fluid mrfclutch and its design aspects a magneto rheological fluid clutch consists of a input shaft that rotates and which carries an input clutch plate and a housing with front and rear covers. Magnetorheological what does magnetorheological stand for. It is demonstrated that the offstate no applied magnetic. This input clutch plate is enclosed by two output plates in the form of cores on either side. The seal housing has a groove carrying a seal that seals the cavity. Behavior of magnetorheological fluids utilizing nanopowder iron view experiment magnetorheological fluid background information. Barkan kavlicoglu, faramarz gordaninejad, yanming liu, xiaojie wang, and nigar cobanoglu figure 2 presents a cutview of the fea. A magnetorheological fluid mr fluid is a type of smart fluid when subjected to a magnetic field, the fluid greatly increases its apparent viscosity, to the point of becoming a viscoelastic solid. Mrf is an advanced finishing process in which the grinding force is controlled by magnetic field. Frendo2 1department of energy and systems engineering, university of pisa, largo lucio. Design and manufacturing aspects of magnetorheological fluid. Proceedings of spie history of magnetorheological finishing.
Definition of magnetorheological in the definitions. Lumped parameter modeling of a magnetorheological fluid. Torque capacity enhancement of a magnetorheological fluid. This property can be utilised for torque transmission in clutches. Magneto rheological fluid mr fluid or mrf can be defined as smart and controllable fluids. Optics magnetorheological finishing a magnetorheological fluidbased optical polishing method, has proven to be highly precise. You can split pdf documents with multipleconfiguration parameters and combine several of them into one file. Magnetorheological fluid definition of magnetorheological. A lumpedparameter mathematical model of an automotive magnetorheological mr fluid fan clutch was developed. Bica i 2006 advances in magnetorheological suspension. Pdf magnetorheological fluids are such that under the influence of a.
To decrease the dimension of the actuation device while enhancing the functionality, a motor part and mr. Hightorque magnetorheological fluid clutch request pdf. Geometry optimization of a magnetorheological clutch operated. Variable impedance magnetorheological clutch actuator and. Magnetorheological fluids mrf change their viscocity in magnetic fields. In particular, the safety requirements of the braking system needed the clutch to be failsafe, and no axial load had to be exerted on the camshaft. However, the program has an important drawback and its hostile interface, which takes time to get used to. Stamant2 1lsmi, mechanical engineering department, universite laval, quebec, quebec, canada, g1k 7p4 phone. Mrf polishing, exclusively available from qed is flexible and fast, reliable and accurate polish optics to satisfy customers like never before. Fewer mr clutchesbrakes are based on a combined permanent magnetswired. Electromagnetic finite element analysis fea is performed to design and optimize the clutch. Geometry optimization of a magnetorheological clutch operated by coils francesco bucchi, paola forte, francesco frendo department of civil and industrial engineering universit a di pisa largo lucio lazzarino, 56122 pisa, italy. An innovative multigap clutch based on magnetorheological. If it is set low, the clutch will transmit only avoid saturation.
The clutch s torque output can be controlled by adjusting the applied magnetic field. It is shown how magna powertrain could create an efficient mrf clutch by. The bearings are provided which support the housing on the input shaft. Magnetorheological fluid synonyms, magnetorheological fluid pronunciation, magnetorheological fluid translation, english dictionary definition of magnetorheological fluid.
With an mrf machine on your shop floor, you can polish an optical surface to pristine form, figure, and finish, regardless of symmetry, geometry, or slope variation. This model is able to describe the average fluid temperature, average clutch temperature, and output fan speed as a function of time, input current, and fluid composition. Response of a magnetorheological brake under inertial loads. Magnetic fem design and experimental validation of. Magna powertrain could create an efficient mrf clutch by combining clutch design. Response of a magnetorheological brake under inertial loads ubaidillah 1, fitrian imaduddin2, muhammad nizam, and saiful a. When subjected to a magnetic field, the fluid greatly increases its apparent viscosity, to the point of becoming a viscoelastic solid. Herschelbulkley model is used to describe the constitutive behavior of magnetorheological mr fluids subject to an applied magnetic field. Magnetorheological fluid mechanical engineering applied. The mrf clutch thus may replace the existing torque converters and therefore help. G rural medical center, near muniappan temple, neelambur bus stop, coimbatore 641 062. Szabo2 1university of novi sad, 6 trg dositeja obradovica, 21 000 novi sad, serbia email.
Sep 17, 2017 the magnetorheological brake mrb is an electronic braking system for the automotive or aerospace engineering. Based on the shear flow equation at the narrow gap, a theoretical analysis of the effect of the applied magnetic field on the viscoplastic flow between two parallel disks is presented. Pdf download for design, testing and analysis of a novel composite. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The clutch is composed of a drumshaped rotor, which has a rotational degree of freedom with respect to a cylindrical stator and magnetic field generator. Magnetorheological smart automotive engine mount chiranjit sarkar,harish hirani and abhijit sasane.
A magnetorheological clutch in accordance with claim 8, wherein at least one additional magnet coil is also associated with the second yoke. Innovator project training institution ipc project center 1447d, avinashi road, back side of p. Magnetorheological mr polishing fluid comprises of carbonyl iron powder and silicon carbide abrasives dispersed in the viscoplastic base of grease and mineral oil. The shear stress distribution in mrf between the plates is theoretically predicted using the magnetic flux density distribution evaluated from the fea. This property can be utilized for torque transmission in clutches. In this paper, the torque transmitted by mr fluids is analyzed to compute the torque transmission ability in the disktype mr fan clutch. Magnetorheological fluid and its applications pranav gadekar, v. Joining and welding research institute, osaka university, ibaraki, osaka 5670047, japan. After that, pdf split and merge is a very useful tool. A magnetorheological clutch in accordance with claim 8, wherein the magnetic permeability of the discs is approximately the same as that of the magnetorheological fluid. A magnetorheological damper or magnetorheological shock absorber is a damper filled with magnetorheological fluid, which is controlled by a magnetic field, usually using an electromagnet. A magnetorheological clutch mrc uses this property to transmit torque. Mrf clutch by combining clutch design, fluid development and magnetic circuit optimization. Sep 22, 2017 innovator project training institution ipc project center 1447d, avinashi road, back side of p.
A magnetorheologic clutch includes a stationary part, a rotatable primary part having primary discs, a secondary part having secondary discs, and a chamber containing magnetorheologic fluid formed between the primary and secondary parts that is exposed to an adjustable magnetic field. Automotive the mr sponge clutch may be used to provide launch control of an automobile thereby achieving smooth vehicle launch. Combining the two types within the clutch, all of the area of the input plate can be used to. Pdf properties and application of magnetorheological fluids. Magnetorheological is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms. A multigap magnetorheological clutch with permanent magnet r. The inventive magnetorheological clutch comprises a fixed part 1, a primary rotatable part provided with primary discs 4 and a secondary part 6 provided with secondary discs 14, wherein a magnetorheological fluidcontaining space 19 is formed and a magnetic field acts on said magnetorheological fluid. Design and development of compact magnetorheological. Magnetorheological fluid before and after exposure to a magnetic field without current flowing through the wires, the armor would remain soft and flexible. Development of magnetorheological finishing mrf process for. As a first stage of the development of the mr fluid clutch. The input shaft from the dc motor is connected to a single input clutch plate. Although magnetorheological fluids have a good quality of control, due to their restricted efficiency they have not been suitable for applications in vehicle powertrains so far.
Before joining the academic staff of the univer sity of pisa as. A multigap magnetorheological clutch with permanent magnet. Performance evaluation and validation of magneto rheological. Mazlan2 1mechanical engineering department, faculty of engineering, universitas sebelas maret jl. Optical surfaces are polished in a computer controlled magnetorheological mr finishing slurry. Analysis of a magnetorheological transmission for fan clutch. Flow of the magnetorheological fluid in disctype clutch. Magnetorheological fluid with the right combination of density, particle shape and field strength, magnetorheological fluid can change from a liquid to a very thick solid.
This mr clutch achieves high torque transfer without increasing power consumption and maintains the footprint of the device. The magnetorheological brake mrb is an electronic braking system for the automotive or aerospace engineering. A magneto rheological fluid clutch according to a preferred aspect of the present invention includes a seal housing carried on the input shaft inside the input clutch plate so that the input clutch plate is fixed on the input shaft through the seal housing. Implementation of magnetorheological dampers in bumpers. Pdf split and merge allow you to merge a pdf document in a simple and easy way. Looking for online definition of magnetorheological or what magnetorheological stands for. Unlike conventional rigid lap polishing, the mr fluids shape and stiffness can be magnetically manipulated and controlled in real time. Pdf design of a magnetorheological clutch mechanism. A magnetorheological mr fan clutch is a device that transmits torque by the shear stress of the mr fluids. A magneto rheological fluid clutch includes a rotatable input shaft which rotates with an input clutch plate engaged about the input shaft. The present article shows how magna powertrain could create an efficient mrf. Importantly, the yield stress of the fluid when in its active on state can be controlled very. As tires become ever lower in profile and roads get ever worse, ride comfort is knife with two blades if a car is to have the sharp responses we like. Various active damping systems have promised an answer here, and none has been more impressive than delphis magneride, the magnetorheological.