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Magnetic suspension and dynamical pressure air-floating composite bearing

A composite bearing and magnetic levitation technology, which is applied in the field of bearings, can solve the problems of bearing surface wear, motor failure to start, and reduced working life, and achieve the effects of increased bearing capacity, improved reliability, and low friction

Inactive Publication Date: 2005-06-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of dry friction state of the bearing causes severe wear on the working surface of the bearing, reduces the working life, and even makes the starting torque exceed the motor stall torque, and the motor cannot start
Therefore, special materials with excellent anti-friction properties must be used, resulting in high cost, low life, and difficulty in popularization

Method used

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  • Magnetic suspension and dynamical pressure air-floating composite bearing
  • Magnetic suspension and dynamical pressure air-floating composite bearing
  • Magnetic suspension and dynamical pressure air-floating composite bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 As shown in Fig. 1, a rotor bearing arrangement form, the working surface 3 adopts two forms of inner cylindrical surface and plane, and steps are arranged on the rotor shaft 4 to increase the shaft diameter and enhance the bearing capacity of the radial bearing, and at the same time provide The arrangement of magnetic pole 1 provides space, the axial bearing magnetic pole 1 adopts four poles or single pole, and the radial bearing magnetic pole adopts eight poles;

Embodiment 2

[0030] like image 3 As shown, a rotor bearing arrangement form, the working surface 3 adopts two forms of outer cylindrical surface and plane, that is, the mandrel 5 is the stator, the axial bearing magnetic pole adopts four poles or one pole, and the radial bearing magnetic pole adopts eight poles. The mandrel 5 is fixed integrally with the radial bearing magnetic pole 1 and the axial bearing magnetic pole 1;

Embodiment 3

[0032] like Figure 5 As shown, a tapered bearing form, the working surface 3 adopts a conical shape, and the magnetic pole 1 of the tapered bearing adopts eight poles;

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PUM

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Abstract

A "composite bearing of magnetic levitation and dynamic pressure air bearing", in which a dynamic pressure groove is opened on the surface of the magnetic levitation magnetic pole, and the magnetic levitation pole constitutes part or all of the dynamic pressure air levitation working surface. The feature of the invention is to eliminate the dry friction state in the process of starting and stopping, and the bearing can achieve no wear, long life and low starting torque, while maintaining the inherent advantages of the dynamic pressure air bearing, and greatly reducing the cost of surface treatment of the dynamic pressure air bearing Requirements and costs, adjusting the "center point offset rate" ψ according to different needs can make the system have different output characteristics, so that the dynamic pressure air bearing can be applied to medium and large equipment.

Description

technical field [0001] The invention relates to a bearing with combined effects of magnetic levitation and dynamic pressure air flotation, especially an ultra-precision and ultra-high-speed bearing. Background technique [0002] The dynamic pressure air bearings currently used in engineering, such as: gyro dynamic pressure motor bearings, high-speed motor dynamic pressure air bearings, high-speed booster pump dynamic pressure air bearings, etc., have a dry friction state during the start-up process, and the bearing speed reaches a certain value At the same time, there is also a dry friction state during the stop process. When the bearing speed decreases to a certain value, the dynamic pressure film disappears, and the bearing enters a dry friction state. Under the action of dry friction, the bearing speed drops. To zero, (Chemical Industry Press. "Mechanical Design Handbook" Volume II Part Seven - Gas Lubricated Bearings. Fourth Edition in 2002; Machinery Industry Press. "Me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/00
Inventor 谭久彬姚绍明杨文国金国良
Owner HARBIN INST OF TECH