Magnetic fluid lubricating bearing and manufacturing method thereof
A technology for lubricating bearings and magnetic fluids, applied to bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of restricting the use of magnetic fluid lubrication, and achieve the effect of preventing the entry of dust and other pollutants and good sealing effect
Inactive Publication Date: 2012-08-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
However, the current design of magnetic fluid bearings mainly uses block permanent magnets, which requires enough space to place block permanent magnets when the bearing is assembled structurally, so this type of design limits the use of magnetic fluid lubrication to a certain extent
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[0013] figure 1 It is a structural schematic diagram of a rolling bearing lubricated by magnetic fluid. The inner wall of the bearing end cover on both sides is processed with a magnet array, and the magnetic fluid is adsorbed by the magnetic field generated by the magnet array to form a bulge shape as shown in the figure, and the magnetic fluid is not affected by gravity and centrifugal force. By properly controlling the mechanical dimensions of the parts, the magnetic fluid bulge inside the bearing end cover can always be in contact with the cage and rolling elements in the rolling bearing to form lasting lubrication.
[0014] The manufacture of the magnet array inside the bearing end cover is mainly divided into three steps, as follows: figure 2 shown. For the first time, an array of dimples is processed on the inner surface of the bearing end cover, and its size can be on the order of millimeters or microns ( figure 2 step 1). The permanent magnet material is install...
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The invention provides a magnetic fluid lubricating bearing and a manufacturing method thereof and belongs to the technical field of a rolling bearing. The bearing comprises an outer bearing ring, a first bearing shaft end cover (2), a second bearing shaft end cover (5), and a rolling body (3), wherein the first bearing shaft end cover (2) and the second bearing shaft end cover (5) are fixed in the outer bearing ring (1); the rolling body (3) is mounted between the first bearing shaft end cover and the second bearing shaft end cover; and magnetic fluid bumps (8) are further arranged in concave pit arrays on the inner surfaces of the first bearing shaft end cover (2) and the second bearing shaft end cover (5). Through adoption of the scheme, in structure, a space for mounting a permanent magnet in the traditional magnetic fluid bearing can be saved and the assembling of the magnetic fluid bearing can be simplified; and meanwhile, the design further expands the application field of the lubrication of magnetic fluid.
Description
[0001] technical field [0002] The invention relates to a magnetic fluid lubricated bearing and a manufacturing method thereof, belonging to the technical field of rolling bearings. Background technique [0003] Magnetic fluid is a colloidal substance formed by nano-scale magnetic particles coated with a surfactant and dispersed in a base carrier liquid. Lubrication is a successful application of ferrofluids. From the analysis of the principle of lubrication and application requirements, the magnetic fluid as a lubricant has the following advantages: (1) It can be concentrated and kept on the parts that need to be lubricated by using an external magnetic field, and the magnetic fluid is not affected by gravity and centrifugal force. Small and reliable; (2) The corresponding magnetic field design can simultaneously play a self-sealing effect to prevent external pollution; (3) The use of an external magnetic field can significantly increase the viscosity of the magnetic flui...
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IPC IPC(8): F16C33/66
Inventor 黄巍王晓雷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS