Electromagnetic linear actuator based on reed valve heat dissipation

Abstract

The invention relates to an electromagnetic linear actuator based on reed valve heat dissipation. The electromagnetic linear actuator comprises a reed valve seat, a reed, a reed valve cover, an end cover, an outer magnet yoke, an inner magnet yoke, a permanent magnet array, a coil and a framework. The actuator is characterized in that an air gap is formed between the outer magnet yoke and the inner magnet yoke; a Halbach permanent magnet array layer is adopted to enhance an air gap magnetic field; the magnet yokes, the end cover, the reed valve seat and the reed valve cover are fixedly connected to serve as stators; the coil assembly is wound on the framework and can reciprocate in the air gap to serve as a rotor; the framework is of a circular barrel-shaped structure with one open end; the inner magnet yoke is of a hollow cylindrical structure; an inner cavity of the inner magnet yoke and an inner cavity of the framework form an air pumping cavity; the reed is installed in the reed valve seat, and the reed valve cover limits the openable stroke of the reed; in the reciprocating / reciprocating motion process of the rotor, the reed is opened / closed, and pumping gas enters the actuator from the reed and the air gap and is discharged from the air gap to take away heat in the electromagnetic linear actuator. The heat dissipation performance and the power density of the electromagnetic linear actuator are effectively improved.

Description

technical field [0001] The invention relates to the technical field of actuators, in particular to an electromagnetic linear actuator. Background technique [0002] Due to its excellent performance, rotary motors are widely used in various fields of industry. However, in some occasions that require linear drive, the technical solution of rotary motor combined with rotary to linear motion conversion mechanism is often used. With the development of direct drive technology, linear Actuators are becoming more and more popular in some fields that require fast response and high precision control. [0003] At present, the power density and output force density of linear actuators are the key to determine its application performance. However, the improvement of power density and output force density often leads to a sharp increase in energy consumption of linear actuators, which causes serious temperature rise, which directly affects the performance of actuators. Work stability and...

AI Technical Summary

Problems solved by technology

[0005] Design an electromagnetic linear actuator based on reed valve heat dissipation, use the Halbach permanent magnet array to enhance the air gap magnetic field strength, improve the power density and output force density of the linear actuator, and use the reed valve to pump gas without affecting Under the premise of the compact structure of the actuator, the problem of serious heating of the electromagnetic linear actuator is solved, which is conducive to improving the power density and working reliability of the electromagnetic linear actuator

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