SU560310A1 - Magnetohydrodynamic choke - Google Patents

Description

The exciton systems adjacent to the poles are made of a ferromagnetic material, and the other two are made of a non-ferromagnetic material, the last two are taken out of the poles of the excitation system and the distance / determined by the dependence

1.5) -ki,

/ (1 s

Where

A is the wall thickness of the metal pipe; 2c is the width of the pole of the excitation system;

2h is a nonmagnetic gap. Between the ferromagnetic walls of the metal conductor; | l - relative magnetic permeability of the ferromagnetic walls of the metal pipe.

FIG. 1 shows the magnetic hydrodynamic choke, general view; FIG. 2 same plan view.

The magnetic hydrodynamic choke contains a metal pipe 1 with two walls 2 of ferromagnetic material and two walls 3 of non-ferromagnetic material placed between the poles of the magnetic excitation system 4.

The walls 3 protrude beyond the poles of the magnetic system by

/ (1 --- 1.5) - / IU,

WITH

Where

A - wall thickness of the metal pipe; 2c is the width of the pole of the excitation system;

2h - non-magnetic gap between the ferromagnetic walls of the metal pipe; | l - relative magnetic permeability of the ferromagnetic walls of the metal pipe.

When a liquid metal moves in a 1 B metal pipeline, a magnetic field created by the excitation system 4 in a moving medium

currents are induced, the interaction of which with the magnetic field creates a braking electromagnetic force.

The selected length of the non-ferromagnetic walls 3 provides the maximum braking force, since the reverse currents (at the input and output sections of the metal pipe) flow in areas where there is no external magnetic field, which increases the efficiency of flow control.

Claims (3)

Invention Formula A magnetohydrodynamic choke for controlling the flow of a liquid metal containing a controlled excitation system for a magnetic field in a metal conduit channel, the two walls of which are adjacent to the poles of the excitation system are made of ferromagnetic material, and the other two are from a non-ferromagnetic material, characterized in that, in order to increase the control efficiency, the walls of the non-ferromagnetic material are brought outside the poles of the excitation system / defined by dependency / (, 5) A / g ,,, s where A is the wall thickness of the metal pipe; 2c is the width of the pole of the excitation system; 2 / g - nonmagnetic gap between the ferromagnetic walls of the metal pipe; JJ, is the relative magnetic permeability of the ferromagnetic walls of the metal conductor. Sources of information taken into account in the examination: 1. Auth. St. No. 180313, cl. B22d, 1960. 2. US patent number 3807903, cl. 417-50, 1970. 3. US patent number 2838001, cl. 417-50, 1958 (prototype).