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Magnetofluid bearing

A magnetic fluid and bearing technology, applied in bearings, shafts, bearings, mechanical equipment, etc., can solve problems affecting bearing performance and inconvenient repairing of assembly machines, and achieve low friction, enhanced magnetic properties, improved sealing performance and load-carrying capacity Effect

Inactive Publication Date: 2009-05-27
伍劲刚 +1
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  • Summary
  • 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] Such as figure 1 ,figure 2, image 3 As shown, the present invention includes a bearing inner sleeve 1 with a shoulder at one end, a bearing outer sleeve 2, a permanent magnet, a magnetic fluid, and an inner sleeve fixing ring 7. The permanent magnets 3 and 4 separate the annular columnar permanent magnets formed by separators 5, and the bearing cover 2 is fixedly mounted on the outer circle of the annular columnar permanent magnets. The radial width of the separators 5 is smaller than the width of the permanent magnets. Two half-ring columnar permanent magnets 3 and 4 form a gap near the inner ring, and the length of the separator 5 is smaller than the length of the permanent magnet on the axial length so that the two half-ring columnar permanent magnets 3 and 4 form a gap at both ends. The bearing outer sleeve 2 is provided with a magnetic fluid injection hole 8 corresponding to the two half-ring columnar permanent magnets 3 and 4 in the gap at the shaft end, and the...

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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 lubricant. Background technique [0002] Magnetic fluid is very fine magnetic particles (or magnetizable particles) coated in surfactant or dispersion, and then mixed in light mineral oil, the diameter of these particles is usually between 3 and 15 microns, and in light Dispersed in a solid mineral carrier. The magnetic particles are usually coated with a surfactant or a dispersant, which can keep a certain distance between the magnetic particles to overcome the Van der Waals force and the magnetic interaction force (attractive force), so that the magnetic fluid Has good sliding properties. Generally, the use of isoparaffin dispersants can achieve a static friction coefficient of 0.0008-0.002, and the viscosity is significantly lower than 2cp-6cp. Due to this property of the magnetic fluid, it can be used as a lubricant for sliding bearings, such as Chinese Patent No. CN260746...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
Inventor 伍劲刚黄艳敏
Owner 伍劲刚
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