Annular electromagnetic induction pump

Abstract

The invention relates to an electromagnetic induction pump comprising:-a tubular inner inductor comprising a plurality of inner combs and inner coils positioned between the teeth of said inner combs, the interior of said inner inductor forming a cavity; an inner tube positioned around the inner inductor; -a pumping channel allowing circulation of the fluid to be pumped,-an outer tube, the channel being located between the inner tube and the outer tube; -a tubular outer inductor positioned around the outer tube and comprising a plurality of outer combs and outer coils positioned between the teeth of said outer combs; the electromagnetic pump further comprises moving means for moving the inner comb part and capable of changing the radial gap between said inner comb part and the inner tube and comprising a first part positioned inside the inner inductor and connected to the inner comb part so as to enable radial movement of the inner comb part. And a second portion extending at least partially outside the internal inductor and connected to the first portion in a manner to control the first portion.

Description

technical field [0001] The present invention relates to electromagnetic pumps (which may hereinafter be referred to as "EM pumps"), and more particularly to ring EM induction pumps, especially those high power electromagnetic pumps typically above 500 kW. [0002] The invention can find application notably in sodium cooled fast neutron reactors (commonly referred to as "Na FNR"), especially in the secondary cooling loop of a NaFNR. Background technique [0003] Generally, it is known practice to use electromagnetic pumps to pump liquid metals. In certain areas of use with liquid metals, such pumps actually offer advantages over mechanical pumps. Solenoid pumps do not require a lubrication circuit as they have no moving parts and therefore no parts that need to be lubricated. This provides greater reliability compared to mechanical pumps. Furthermore, the cooling circuit for the electromagnetic pump advantageously uses the liquid metal it is pumping, such as sodium. In th...

AI Technical Summary

Problems solved by technology

However, the force provided by the internal spring is not adjustable unless the internal sensor is removed and the contact system is changed

[0023] In all these solutions offered, the system for assembling the electromagnetic pump is difficult, and the contact induction system is long and difficult to adjust, or even impossible to adjust in the case of internal induction

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