Magnetron Tube Replacement via Magnetic Field Diversion

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Solution Overview

Problem

Existing magnetrons with high power requirements cannot use permanent magnets for magnetic field generation due to the inability to switch off the permanent magnetic field, making it difficult to replace magnetron tubes during maintenance.

Innovation Solution

A magnetic field conductor device with a diverting element, comprising iron yokes and circularly arranged bar magnets, deflects the magnetic field away from the magnetron tube, allowing for easy disassembly and replacement by directing the magnetic field through the evacuated region of the magnetron tube.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by stationary object

If permanent magnets are used for magnetic field generation, then construction space is reduced and power electronics is not required, but the magnetron tube cannot be removed during maintenance due to the permanent magnetic field

Engineering Contradiction:

Improvepower electronics requirementVSAvoidmagnetron tube replacement

Core Design Contradiction:

Use of energy by stationary objectVSEase of repair

Solution Approach 1:

The magnetic field generation system is segmented into multiple independent bar magnets arranged in a circle, allowing the magnetic field to be divided into discrete units that can be individually controlled or bypassed during maintenance operations

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A diverting element acts as an intermediary component that temporarily redirects the magnetic field away from the magnetron tube during maintenance, enabling tube replacement without requiring complete demagnetization or system shutdown

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of repair

If electromagnets are used for magnetic field generation, then the magnetron tube can be removed by switching off the magnetic field, but construction space increases and power electronics is required

Engineering Contradiction:

Improvemagnetron tube replacementVSAvoidconstruction space

Core Design Contradiction:

Ease of repairVSVolume of stationary object

Solution Approach 1:

The electromagnetic control system is replaced with a permanent magnet mechanical arrangement combined with a simple diverting element, eliminating the need for power electronics and complex switching mechanisms while maintaining ease of maintenance

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic field configuration is changed from a uniform electromagnet field to a segmented permanent magnet field that can be redirect ed through mechanical positioning of the diverting element, altering the field's spatial parameters to enable maintenance access

Inventive Principle:

Principle #35Parameter changes

3Power

If high magnetic field forces are used, then magnetron performance is improved, but magnetron tube replacement becomes difficult without switching off the magnetic field

Engineering Contradiction:

Improvemagnetron powerVSAvoidmagnetron tube replacement

Core Design Contradiction:

PowerVSEase of repair

Solution Approach 1:

The diverting element extracts or removes the magnetic field from the immediate vicinity of the magnetron tube during maintenance, separating the high-field operational region from the maintenance access region, allowing tube replacement while preserving the high magnetic field force capability

Inventive Principle:

Principle #2Taking out (Extraction)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables the use of permanent magnets in high-power magnetrons, facilitating simple and cost-effective disassembly and replacement of magnetron tubes while maintaining strong magnetic fields.

Implementation Method 1

The magnetic field generation apparatus generates a magnetic field in the evacuated region, which field is essentially axially orientated with respect to the cathode and the anode. Permanent magnets or electromagnets can be used for generating the magnetic field.

Methodology Applied

Scientific EffectMagnetic field generation by permanent magnets: Magnetism

Implementation Method 2

the diverting element is detachably arranged on the magnetic field generation apparatus in order to deflect a magnetic field generated by the permanent magnetic arrangement such that the magnetron tube can be removed from the magnetron

Methodology Applied

Scientific EffectMagnetic field deflection by magnetic conductor: Magnetic Field

Data Source

PatentUS9595414B2Magnetic field generation apparatus for a magnetron tube, magnetron and method for replacing an old magnetron tube of a magnetron with a new magnetron tube

Publication Date: 2017.03.14 MUEGGE

AI summary

A magnetic field generation apparatus is provided for a magnetron including a permanent magnet arrangement and a magnetic field conductor device. The magnetic field conductor device has a diverting element. The diverting element, which includes a plurality of rectangular diverting segments, is arranged detachably on the magnetic field generation apparatus during maintenance work in order to deflect a magnetic field generated by the permanent magnet arrangement away from further components of the magnetic field generation apparatus and components of the magnetron. A magnetron includes a magnetron tube and such a magnetic field generation apparatus. In a method for replacing an old magnetron tube of such a magnetron with a new magnetron tube, the diverting element is arranged on the magnetic field generation apparatus, and the old magnetron tube is removed from the magnetron and replaced with the new magnetron tube in order to then remove the diverting element again.