Eddy-current damping magnetic spring

Abstract

The invention relates to an eddy-current damping magnetic spring. The eddy-current damping magnetic spring comprises a first halbach permanent magnet array and a second halbach permanent magnet array, wherein one of the first halbach permanent magnet array and the second halbach permanent magnet array is a stator, and the other of the first halbach permanent magnet array and the second halbach permanent magnet array is a rotor. The first halbach permanent magnet array and the second halbach permanent magnet array are provided with first end faces close to each other and second end faces away from each other correspondingly. A gap is formed between the first end face of the first halbach permanent magnet array and the first end face of the second halbach permanent magnet array. The eddy-current damping magnetic spring further comprises an eddy-current damping piece which is located on the second end face of the first halbach permanent magnet array or the second end face of the second halbach permanent magnet array. The damping rotary positioning spring provided by the invention has the advantages that the positioning rigidity is high, switching is rapid, and excessive vibration is avoided.

Description

technical field [0001] The invention relates to a damping positioning component, in particular to an eddy current damping magnetic force spring. Background technique [0002] Rotary springs with positioning function are widely used in industrial fields and daily life. For example, the spring doors of buildings can be positioned in the "open" and "closed" states; Angle switch. High positioning rigidity and quick switching of positioning angles are the basic requirements for industrial positioning rotary springs. [0003] The Halbach magnetic pole array forms a single-sided high-intensity magnetic field by assembling the magnetic poles arranged in a rotating magnetic field angle. The stator and rotor composed of halbach magnetic pole arrays have higher magnetic field strength than ordinary magnetic pole arrays, so they can provide higher positioning torque and switching speed. For example, US Patent No. 7,265,470A discloses a positioning spring, which includes two linear or...

AI Technical Summary

Problems solved by technology

However, since the positioning and rotating spring disclosed in the above patent has no damping, excessive centrifugal force is easily caused when rotating too fast, which makes the balance point vibrate and brings unnecessary shaking and impact to the equipment mounted on the spring.

For example, if the rotation positioning spring of the above-mentioned patent is installed on the spring door, during the opening / closing switching process, the spring door will violently move to the balance point of opening or closing, which is obviously not conducive to the use and maintenance of the spring door

Therefore, ordinary positioning springs have the problem of excessive rotation or linear motion without buffering

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