Method for generating electromagnetic force in conductive liquid by fluid driving
A conductive liquid, electromagnetic force technology, applied in electromagnetic metallurgy, chemical industry and glass industry, semiconductor material preparation fields, can solve the problem of permanent magnet Curie temperature limit, electromagnetic drive working space is difficult to use, limited driving effect and other problems, to achieve Improved designability and controllability, high electromagnetic force density, and improved efficiency
Active Publication Date: 2013-11-13
GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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Problems solved by technology
The traditional electromagnetic driving or stirring technology has the following disadvantages: (i) When the characteristic scale d>>δ of the conductive liquid, the core of the conductive liquid (the width is d-2δ) (4) is hardly affected by the electromagnetic force, often only The movement of its heart can be realized by the flow of conductive liquid in the skin layer, and the driving effect is extremely limited
But the use of permanent magnets is limited by their Curie temperature
(iv) In the process of die casting or some precision casting, due to the existence of the mold and the complex shape of the casting, the traditional electromagnetic driver is difficult to use because there is not enough working space
Method used
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[0024] The present invention proposes a method for generating electromagnetic force in a conductive liquid by means of fluid drive. The electromagnetic driver manufactured by this method has a structural principle as follows: figure 2 As shown, the method includes the following steps:
[0025] (i) forming a cylindrical cavity (7) in the conductive liquid, the cavity is provided with a driving fluid inlet (5) and a driving fluid outlet (6);
[0026] (ii) Place the turbine blade (8) in the cylindrical cavity (7), the turbine blade (8) is installed on the bearing (9), the bearing (9) is coaxially installed with the cylindrical cavity (7), and the turbine The blade (8) can rotate freely, and the turbine blade (8) can be designed into a reasonable shape according to the principle of aerodynamics to obtain better driving efficiency;
[0027] (iii) relatively fixing the permanent magnet (10) to the turbine blade (8);
[0028] (iv) Make the fluid enter the cylindrical cavity (7) fr...
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The invention relates to a method for generating an electromagnetic force in conductive liquid by fluid driving, and belongs to the technical field of electromagnetic metallurgies, semiconductor material preparation, chemical industries and glass industries. A sealed cylindrical cavity is formed in the conductive liquid; a driving fluid inlet and a driving fluid outlet are formed on the cavity; turbine blades are arranged in the cavity and can freely rotate in the cavity; permanent magnets are fixed relative to the turbine blades; fluid flows into the cylindrical cavity from the driving fluid inlet, drives the turbine blades to rotate and drives the permanent magnets to rotate, so that a rotary magnetic field is generated; eddy current is generated in the conductive liquid at the periphery of the cylindrical cavity; and the rotary magnetic field and the eddy current react to generate the electromagnetic force and drive or agitate the conductive liquid. According to an electromagnetic driver manufactured by the method, the structure of the electromagnetic driver is simplified greatly, so that the application range of the electromagnetic driver is expanded, and the efficiency for driving or agitating the conductive liquid is improved.
Description
technical field [0001] The invention relates to a method for generating electromagnetic force in a conductive liquid driven by a fluid, and belongs to the technical fields of electromagnetic metallurgy, semiconductor material preparation, chemical industry and glass industry. Background technique [0002] The electromagnetic field acting on conductive liquids, especially metal liquids, has many significant and usable effects. Corresponding technologies such as electromagnetic stirring, electromagnetic melting, electromagnetic levitation, electromagnetic forming, electromagnetic braking, electromagnetic sputtering, etc., can also develop materials The new technology of preparation, such as the preparation of particle or fiber reinforced metal matrix composites, the use of electromagnetic stirring to realize semi-solid casting, die casting including precision casting, etc. Appropriately applying an electromagnetic field to generate a suitable electromagnetic force in the metal...
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IPC IPC(8): H02K44/00F03B3/12
CPCY02E10/223Y02E10/20Y02P70/50
Inventor 王晓东
Owner GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS