Magnetic push suspension bearing unit

Abstract

The invention discloses a magnetic push suspension bearing unit, comprising a shaft, an inner magnetic ring, an outer magnetic ring, an auxiliary bearing, a limiting block and a bracket, wherein the inner magnetic ring is arranged at the near end part of the shaft; the corresponding outer magnetic ring is arranged on the bracket; the adjacent surfaces of the two magnetic rings are the same in polarity; an inner magnetic barrel for magnetizing in a radial manner is arranged on the shaft; the inner magnetic barrel is sleeved with an outer magnetic barrel for magnetizing in the radial manner, and the outer magnetic barrel is fixedly arranged on the bracket; the adjacent surfaces of the two magnetic barrels are the same in polarity; the auxiliary bearing is also arranged between the shaft and the bracket; corresponding limiting block and limiting ball are arranged at the end of the shaft; a direct contact rolling body is not formed between the shaft and the bracket; the shaft and the bracket form a suspension state by virtue of a magnetic push shaft; the shaft and the bracket are free of friction, free of abrasion, high in transmission efficiency, free of cooling and lubricating, and long in service life, and the magnetic push suspension bearing unit has high applicable value in high-speed fields of aerospace and the like.

Description

technical field [0001] The invention relates to a rotating device, in particular to a bearing unit, in particular to a magnetic suspension bearing unit. Background technique [0002] At present, most of the bearings used in the machinery industry are composed of bearing inner rings, outer rings and rolling elements in between, which generate friction during transmission and wear between transmission parts. In order to reduce wear, it is necessary to cool down and Lubrication, this kind of bearing has the disadvantages of low transmission efficiency, large wear and short service life, and the service life is short at high speed, which can only guarantee the normal working cycle of tens of hours. [0003] And the existing Chinese patent: 200520020138.4 discloses a permanent magnet magnetic levitation shaft, which is composed of inner and outer cylindrical magnets and two pairs of magnetic rings, so that the inner ring assembly is in a suspended state, but because its three act...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the bearings used in the machinery industry are composed of bearing inner rings, outer rings and rolling elements in between, which generate friction during transmission and wear between transmission parts. In order to reduce wear, it is necessary to cool down and Lubrication, this kind of bearing has the disadvantages of low transmission efficiency, large wear and short service life, and the service life is short at high speed, which can only guarantee the normal working cycle of tens of hours

[0003] And the existing Chinese patent: 200520020138.4 discloses a permanent magnet magnetic levitation shaft, which is composed of inner and outer cylindrical magnets and two pairs of magnetic rings, so that the inner ring assembly is in a suspended state, but because its three acting force surfaces are installed in a closed In the housing, the structure requires high assembly technology and is not easy to install and debug; moreover, because the magnetic suspension bearing is a kind of flexible support, the impact resistance is poor, and external factors can easily cause radial and axial displacement of the shaft during rotation. Displacement or swing, and in the above patent, there is no limit protection mechanism in the axial and radial directions, and the displacement and swing of the rotating shaft will easily cause friction, fire or even explosion between the magnetic blocks, especially in the application of high-speed rotating shafts. In addition, most of the electromagnetic suspension bearings that can be seen on the market require high control precision, more complex structures, and very high cost, making them difficult to popularize and apply.

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