Magnetic fluid lubricating method based on tiny magnetic body array

A magnet array, magnetic fluid technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of single magnetic field, limiting the effect of magnetic fluid lubrication, etc., to improve the lubrication effect and improve the bearing capacity.

Inactive Publication Date: 2008-10-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

However, the current design of magnetic fluid bearings mainly uses block permanent magnets, which require enough space to place b

Method used

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  • Magnetic fluid lubricating method based on tiny magnetic body array
  • Magnetic fluid lubricating method based on tiny magnetic body array
  • Magnetic fluid lubricating method based on tiny magnetic body array

Examples

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Embodiment Construction

[0014] The drawings show an embodiment of the invention and the design of two magnet arrays therein. figure 1 It is a design diagram of a magnetohydrostatic support and lubrication system based on a micro-magnet array. The key to the implementation of this design is the fabrication of the tiny magnetic field array, which can be realized in the following way. First of all, choose the surface material of the friction pair, you can choose ferromagnetic material and non-ferromagnetic material. Ferromagnetic materials include electrical pure iron and ordinary carbon steel. Electrical pure iron is a good magnetic material, while ordinary carbon steel is also a ferromagnetic material and may have residual magnetism. Non-ferrous materials can use non-ferrous metals, silicon wafers and engineering plastics Such as PTFE and UHMWPE etc. Then, processing on the surface of the friction pair can further deposit micro-textures of magnetic materials, such as micro-scale pits (such as figu...

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Abstract

Disclosed is a magnetic fluid lubrication method based on micro-magnet arrays, pertaining to the technical field of magnetic fluid lubrication. The method is characterized by comprising the processes as follows: (1) micro-pits or micro-grooves with a size from micron to millimeter are manufactured on friction pair surfaces; (2) permanent magnetic material is deposited on the micro-pits or the micro-grooves with a thickness of microns to millimeters to form micro-magnet arrays; (3) magnetic fluids are filled between the friction pair surfaces; under the function of the magnetic filed produced by the permanent magnetic material layer, the micro drops of the magnetic fluid are assembled to the surrounding of the magnet arrays to form supporting force. The method expands the application range and enhances the lubrication effect of the magnetic fluid lubrication, thereby providing a solution to the lubrication problems under special conditions.

Description

technical field [0001] The invention relates to a magnetic fluid lubrication method based on a micro-magnet array, and belongs to the technical field of magnetic fluid lubrication. Background technique [0002] Sliding bearings currently used include various forms such as boundary or mixed lubrication, hydrodynamic lubrication, and hydrostatic lubrication. Sliding bearings under low-speed conditions often work under boundary lubrication or mixed lubrication, which has the problems of high friction coefficient and easy wear. Hydrodynamically lubricated bearings require a certain relative velocity to establish a lubricating oil film. Hydrostatic bearings, on the other hand, require a dedicated pressure oil supply system. [0003] Chinese Utility Model Patent No. 02288353.3 discloses a magnetic fluid lubricated sliding bearing. It utilizes the feature that magnetic fluid can be positioned and restricted in the desired position by an external magnetic field to achieve lubrica...

Claims

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Application Information

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IPC IPC(8): F16C32/04
Inventor 王晓雷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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