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Alternating current driven liquid metal electromagnetic pump

An AC drive and liquid metal technology, applied in the field of electromagnetic pumps, can solve the problems of demagnetization of permanent magnets at high temperatures, and achieve the effects of small size, improved transmission efficiency, and high safety factor

Pending Publication Date: 2021-12-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the driving demand of high-temperature molten metal, the purpose of the present invention is to provide an AC-driven liquid metal electromagnetic pump, which effectively solves the problem of demagnetization of permanent magnets at high temperatures, and ensures efficient and continuous transmission of high-temperature molten metal. At the same time, the electromagnetic pump The magnetic field is generated by AC drive, and the pump body has no moving parts, which can effectively avoid the safety hazards caused by the high-speed centrifugal rotation of the permanent magnet.

Method used

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  • Alternating current driven liquid metal electromagnetic pump
  • Alternating current driven liquid metal electromagnetic pump
  • Alternating current driven liquid metal electromagnetic pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] see figure 1 and figure 2 , a liquid metal electromagnetic pump driven by alternating current, comprising a magnetic field generator and a fluid passage 11, the magnetic field generator comprising a front magnetic field generator 1 and a rear magnetic field generator 2 arranged on the front and rear sides of the fluid passage 11, the front magnetic field generates The device 1 is composed of a front yoke group and several front coils 3, the front yoke group is composed of a front yoke back plate 5 and several front yoke ends 4; the rear magnetic field generator 2 is composed of a rear The side yoke group is composed of several rear side coils 6, and the rear side yoke group is composed of a rear side yoke back plate 8 and several rear side yoke ends 7; the fluid channel 11 is fixedly installed on the front side magnetic field generator 1 In the space between the magnetic field generator and the rear side magnetic field generator 2, an alternating magnetic field is gen...

Embodiment 2

[0029] This embodiment is basically the same as Embodiment 1, especially in that:

[0030] In this example, see figure 1 and figure 2 , the front magnetic field generator 1 and the rear magnetic field generator 2 are distributed symmetrically with respect to the fluid channel 11 , and the magnetic poles generated on the two yokes of the front magnetic field generator 1 and the rear magnetic field generator 2 are opposite.

[0031] In this embodiment, the power supply mode of the magnetic field generator adopts three-phase alternating current or two-phase alternating current.

[0032] In this embodiment, the product of the excitation current of the magnetic field generator and the number of turns of the wire wrap is between 100-20000 ampere-turns.

[0033] In this embodiment, the shape of the yoke back plate is circular, semicircular or irregular in shape.

[0034] In this embodiment, the fluid channel 11 is made of stainless steel, silicate insulation material or glass fib...

Embodiment 3

[0037] This embodiment is basically the same as the above-mentioned embodiment, and the special features are:

[0038] In this example, see Figure 1-2 As shown, the magnetic field generators on the front and rear sides are composed of a yoke group and coils wound on the yoke group, and the two magnetic field generators are symmetrically distributed with respect to the fluid channel, the magnetic poles generated on the two yokes are opposite, and the yoke group is composed of conductive It is made of oriented silicon steel with good performance, low coercive force and low magnetic loss. The yoke back plate is a thin-walled circular ring with an inner diameter of 500mm and an outer diameter of 1000mm. Six yoke ends are arranged horizontally on the yoke back plate. The included angle is 60°; the coil is wound on the end of the yoke with a concentrated winding, and the material is copper wire, which is water-cooled by cold cutting. The fluid channel is fixedly installed in the s...

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Abstract

The invention discloses an alternating current driven liquid metal electromagnetic pump. The electromagnetic pump comprises a front magnetic field generator, a rear magnetic field generator and a fluid channel. The fluid channel is fixedly installed in a space formed by the front magnetic field generator and the rear magnetic field generator, the two magnetic field generators are symmetrically distributed relative to the fluid channel, alternating current is applied to a coil to enable an alternating magnetic field to be generated in the fluid channel, meanwhile liquid metal in the channel generates induced current, and the alternating magnetic field interacts with induced current to generate electromagnetic force, so that the fluid is driven to flow from a fluid inlet to a fluid outlet. The transmission efficiency of conductive fluid at different temperatures such as the liquid metal can be effectively improved, meanwhile, the structure is simple, no moving mechanical part exists in the pump body, the safety coefficient is high, and the pump is suitable for the industrial fields of metallurgy, casting, atomic nucleus energy and the like.

Description

technical field [0001] The invention relates to an electromagnetic pump, in particular to an alternating current driven liquid metal electromagnetic pump, which is mainly used in the field of liquid metal drive equipment. Background technique [0002] Electromagnetic pump is an electromagnetic drive technology. Its principle is to use the Lorentz force generated inside the liquid metal by an alternating magnetic field, so as to achieve the purpose of directional delivery of conductive fluid. Because of its advantages of no contact with metal, simple structure and convenient maintenance, it is widely used in casting, metallurgy, atomic kinetic energy and other industrial fields. [0003] Electromagnetic pumps are divided into conduction type and induction type according to the supply method of electric current in the metal. In the conduction electromagnetic pump, the current is introduced into the metal liquid by the external power supply through the metal channel inlet and ...

Claims

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Application Information

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IPC IPC(8): H02K44/06
CPCH02K44/06
Inventor 雷作胜卢海彪王异军张辉琪钟云波
Owner SHANGHAI UNIV