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Hydromagnetic bearing

A magnetic fluid and bearing technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of affecting the bearing performance, inconvenient repair of assembling machines, etc., and achieve the effects of low friction, enhanced magnetism, and good lubrication effect.

Inactive Publication Date: 2008-03-05
伍劲刚 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bearing has some structural defects: it is formed by combining n-1 annular spacers with n-ring permanent magnets in the outer ring of the bearing inner sleeve, and the magnetic fluid is not in the shaft and the bearing after the bearing is assembled. The inner sleeves of the bearing are evenly distributed, but form spaced "O" rings, which will affect the performance of the bearing to a certain extent; in addition, the bearing is injected with magnetic fluid when it is assembled, which affects the assembly and operation of the bearing. Inconvenience for rework of machines fitted with this bearing

Method used

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Embodiment Construction

[0011] As shown in Figure 1, Figure 2, Figure 3, the present invention includes a bearing inner sleeve 1, a bearing outer sleeve 2, a permanent magnet, a magnetic fluid, and an inner sleeve fixing ring body 7 with a shoulder at one end. The permanent magnet is composed of two The half-ring cylindrical permanent magnets 3 and 4 with opposite magnetic poles are separated by a spacer 5 to form a ring columnar permanent magnet. The bearing housing 2 is fixedly installed on the outer circle of the ring columnar permanent magnet, and the spacer 5 is in diameter. The longitudinal width is smaller than the width of the permanent magnet so that the two semi-ring cylindrical permanent magnets 3 and 4 form a gap near the inner ring, and the spacer 5 is shorter than the length of the permanent magnet in the axial length so that the two semi-ring cylindrical permanent magnets 3 4, a gap is formed at both ends, and a magnetic fluid injection hole 8 is provided at the gap between the shaft end o...

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Abstract

The magnetic fluid bearing comprises a bearing internal sleeve with shoulder on one end, a bearing external sleeve, a permanent magnet, magnetic fluid and an internal sleeve fixing ring. The permanent magnet is in hooped-column shape and is formed by two half hooped-column shape permanent magnets which are opposite each other and with contrary magnetic pole and separated by a separation piece. The bearing external sleeve is fixedly mounted on the ex-circle of the hooped-column shape permanent magnet, and the bearing internal sleeve is fixedly mounted on the inner circle of the permanent magnet by the internal sleeve fixing ring. Between the permanent magnet and the bearing internal sleeve there is provided with clearance in which the said magnetic fluid is provided. Advantages: good lubrication effect, strong sealing performance, no dry friction and impaction in rotation, stable operation and very low sound, suitable especially to high rotation speed and environment with dust.

Description

Technical field [0001] The invention relates to a magnetic fluid bearing using magnetic fluid as a lubricant. Background technique [0002] Magnetic fluids are very fine magnetic particles (or magnetizable particles) coated in surfactants or dispersions, and then mixed in light mineral oil. The diameter of these particles is usually between 3-15 microns, and they are light-weight. Disperse in the mineral carrier. Magnetic particles are usually coated with surface active agent or dispersant. The surface active agent or dispersant can keep a certain distance between the magnetic particles to overcome the van der Waals force and the magnetic interaction force (attractive force), thereby making the magnetic fluid Has good sliding properties. Generally, isoparaffin dispersants are used, which can achieve a static friction coefficient of 0.0008 to 0.002, and the viscosity is significantly lower than 2cp to 6cp. Due to the nature of magnetic fluid, it can be used as a lubricant for slid...

Claims

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Application Information

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IPC IPC(8): F16C32/04
Inventor 伍劲刚黄艳敏
Owner 伍劲刚
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