High-speed magnetic-bearing pneumatic spindle

Abstract

The invention provides a high-speed magnetic-bearing pneumatic spindle. The high-speed magnetic-bearing pneumatic spindle is provided with a barrel-shaped shell. An inner shaft is arranged in the shell. Annular permanent magnets are installed between the shell and the inner shaft. Pneumatic wheels are installed in the middle of the permanent magnet. Corresponding permanent magnets are homopolar. The annular permanent magnets are in special shapes. End covers are buckled to the front end and the back end of the shell. According to the high-speed magnetic-bearing pneumatic spindle, the principle that the like poles of the permanent magnets repel is utilized to make a rotation shaft be suspended in a magnetic field and rotate, the spindle is driven by aerodynamic force to rotate at a high speed, and therefore relative friction in rotation is avoided; and the high-speed magnetic-bearing pneumatic spindle has the advantages of being free of friction and noise, resistant to normal and low temperature, free of cooling, large in power, high in load, high in rigidity, revolution number and precision and the like, and the high-speed magnetic-bearing pneumatic spindle can meet the requirements that when the high-speed magnetic-bearing pneumatic spindle is adopted by a machining center to be used for metal cutting, pouring lubricating oil is not needed, the maintenance cost is low, and the service life is long and can be widely used as a precise machining device in the various fields such as the aerospace field, the medical instrument field, the chemical industry field and the machinery field.

Description

Technical field: [0001] The invention relates to a new application field of rare earth permanent magnets without friction, noise and lubrication, in particular to a high-speed magnetic suspension bearing pneumatic main shaft integrating mechanics, dynamics and aerodynamics. Background technique: [0002] Mechanical bearing spindles and air suspension bearing spindles are widely used in various fields such as IT industry, aviation, aerospace, medical treatment, chemical industry, machinery, and precision machining. With the development of the times and the advancement of technology, people cannot effectively solve the problems of friction between each other and noise generated during the working process of widely using rolling bearings to connect mechanical spindles, and the need to pour lubricating oil during work. The main shaft is equipped with a built-in motor to drive the main shaft to rotate, which will generate noise and high temperature, and then it cannot work normal...

AI Technical Summary

Problems solved by technology

However, due to the influence of the air suspension bearing and the motor, the main shaft of the air suspension bearing has the following technical problems: insufficient stability, high rigidity bearing technology needs to be improved, high efficiency, high speed and other technologies need to be improved, and many problems such as temperature change and airflow inertia force need to be overcome.

However, this technology has the disadvantages of complex structure, high cost, poor reliability and inconvenient operation, and it has become an urgent need to solve these problems.

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