MAGNETIC RESISTANCE FLUID FRICTION WITH FERROFLUID INTENDED FOR SPATIAL MECHANISM
DOI:
https://doi.org/10.20535/2305-9001.2015.73.39123Keywords:
bearing, ferromagnetic fluid, static pressure, the velocity distribution, static characteristics, spherical joints, the fluctuations dampersAbstract
The schematic solutions of magnetic bearings with ferromagnetic fluid were developed. The experimental measurements of ferromagnetic fluid accumulation in polar plots of various types of magnets were made. The experimental samples of magnetic poles with the cylindrical and annular magnets were made.
The features of hydrostatic pressure distribution in ferromagnetic fluid in a fixed magnetic bearing were founded. On the basis of the stress tensor analysis the centering action of a magnetic field in the magnetic pole areas of magnetic bearing was proved. The interconnection of pressure and magnetic induction were defined.
The static magnetic characteristics of various types of bearings were defined. It is shown that the bearings characteristics are close to linear. Based on the measured static characteristics the variation of magnetic induction in the ferromagnetic fluid layer was determined.
The features of hydrodynamics of ferromagnetic fluid in the bearing were investigated. The effect of changes in magnetic induction in the fluids velocity distribution and the resistance moment in the liquid layer were defined. These proposals of usage the developed magnetic bearings in technical devices such as spherical hinges of spatial mechanisms and effective dampers with fluid friction were given
References
Branover G.G., Cinober A.B. Magnitnaja gidrodinamika neszhimaemyh sred [Magnetic hydrodynamics incompressible media]. Moskow: Nauka, 1979, p.379.
Sherklif Dzh. Kurs magnitnoj gidrodinamiki [Course magnetohydrodynamics]. Moscow: Mir, 1967, p.319.
Povh I.L. Tehnicheskaja gidromehanika [Technical Hydromechanics]. Lviv: Mashinostroenie, 1969, p. 524.
Kondakov L.A., Golubev A.I., Ovander V.B. etc. Uplotnenija i uplotnitel'naja tehnika: Reference book [Compaction and compaction equipment]. Moskow: Mashinostroenie, 1986, p. 464.
Radionov A.V., Vinogradov A.N. Kombinirovannye magnitozhidkostnye germetizatory – jeffektivnaja al'ternativa beskontaktnym uplotnenijam podshipnikovyh uzlov s zhidkoj smazkoj [Combined magnetic hermetic - effective alternative to non-contact seals bearing assemblies lubricated]. Zbagachennja korisnih kopalin: Scientific and technical collection, 2009, no. 35 (76), pp. 148-155.
Lojcjanskij L.G. Mehanika zhidkosti i gaza [Fluid and gas mechanics]. Moscow: Nauka, 1973, p. 847.
Strutins'kij S.V., Gurzhіj A.A. Prostorovі cistemi privodіv: Monograph [Spatial infusion drives]. Kiev: Pedagogіchna dumka, 2013, p. 492.
Jahno O.M., Strutins'kij S.V.Gіdrodinamіchnі procesi magnіtnih sferichnih sharnіrіv prostorovih sistem privodіv u vigljadі ruhomih oktaedrichnih struktur [Hydrodynamic processes spherical joints spatial magnetic drive systems as mobile octahedral structures] Bulletin of the National Technical University «KpPІ»: Collection of scientific works. Kharkiv: NTU “KhPІ”, 2014, no 1(1044), pp.88-97.
Jahno O.M., Strutins'kij S.V. Gіdrodinamіchnі aspekti techії feromagnіtnoї rіdini v іnercіjnomu dempferі kolivan' prostorovogo mehanіzmu [Hydrodynamic aspects of ferromagnetic fluid flow in the inertial dampers spatial oscillation mechanism] Ukrainian scientific journal «Promislova gіdravlіka і pnevmatika», Vinnitsa Agricultural University, no 1(43), 2014, pp. 27-34.
Strutins'kij S.V. Rozrobka dinamіchnih іnercіjnih magnіtnih privodіv іz feromagnіtnoju rіdinoju dlja peremіshhennja ruhomogo prostorovogo mehanіzmu oktaedrichnogo tipu [Development of dynamic magnetic inertial actuators with ferromagnetic fluid to move the movable spatial mechanism octahedral type] Scientific journal “Tehnologіchnі kompleksi”. Lutsk, no1(9), 2014pp. 132-139.
