Small magnetic field assembly for magnetron

Abstract

The utility model belongs to the technical field of magnetic field assemblies, and particularly relates to a small magnetic field assembly for a magnetron, which comprises a left magnetic steel assembly, a right magnetic steel assembly and a base, and the left magnetic steel assembly and the right magnetic steel assembly are detachably connected by the base; the left magnetic steel assembly comprises a left annular magnetic steel, a yoke, an inner ring and a cover plate. The left annular magnetic steel is bonded on the outer circle of the inner ring and the inner circle of the yoke by a plurality of fan-shaped magnetic steel blocks; the right magnetic steel assembly comprises right annular magnetic steel, a yoke, an inner ring and a cover plate. The right annular magnetic steel is bonded on the outer arc surface of the inner ring and the inner arc of the yoke by a plurality of fan-shaped magnetic steel blocks; and the magnetizing direction of the right annular magnetic steel is opposite to that of the left annular magnetic steel. The weight of the magnetron magnetic assembly is greatly reduced through the left annular magnetic steel and the right annular magnetic steel, and the uniformity of a magnetic field is improved by designing the radial radiation magnetic ring and forming a magnetic loop at the lower part through the magnetic conductive part, so that the magnetic field reaches 240mT-270mT.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic field components, and particularly relates to a small magnetic field component for a magnetron. Background Art

[0002] A magnetron is an electric vacuum device used to generate microwave energy. Essentially, it is a diode placed in a constant magnetic field. Inside the tube, electrons interact with the high-frequency electromagnetic field under the control of a constant magnetic field and a constant electric field that are perpendicular to each other, converting the energy obtained from the constant electric field into microwave energy, thereby achieving the purpose of generating microwave energy.

[0003] When a magnetron operates normally, a very strong constant magnetic field is required, and its magnetic induction intensity is generally several thousand gauss. The higher the operating frequency, the stronger the applied magnetic field. The magnetic circuit system of a magnetron is a device that generates a constant magnetic field. The magnetic circuit system is divided into two categories: permanent magnet and electromagnetic.

[0004] However, in some usage scenarios, the magnetron component is required to be small in size and light in weight, while having high uniformity and reliability. Therefore, how to improve the existing magnetron component, reduce its volume and weight, and improve uniformity and reliability is a technical problem that urgently needs to be solved at present. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a small magnetic field component for a magnetron, which is used to provide a magnetron magnetic field component that has requirements for weight, high reliability and uniformity in special scenarios, and at the same time optimizes the installation method to make the installation process convenient and fast.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0007] A small magnetic field component for a magnetron includes a left magnetic steel component, a right magnetic steel component and a base. The base connects the left magnetic steel component and the right magnetic steel component in a detachable manner.

[0008] The left magnetic steel component includes a left annular magnetic steel, a yoke, an inner ring and a cover plate. The left annular magnetic steel is formed by bonding multiple sector-shaped magnetic steels on the outer circle of the inner ring and the inner circle of the yoke.

[0009] The right magnetic steel component includes a right annular magnetic steel, a yoke, an inner ring and a cover plate. The right annular magnetic steel is formed by bonding multiple sector-shaped magnetic steels on the outer arc surface of the inner ring and the inner arc of the yoke.

[0010] The magnetization direction of the right annular magnetic steel is opposite to that of the left annular magnetic steel.

[0011] Preferably, the base detachably connects the left magnetic steel component and the right magnetic steel component by means of screw connection and forms a magnetic circuit.

[0012] Preferably, upper and lower end faces of the left annular permanent magnet are bonded with an upper cover plate, and upper and lower end faces of the right annular permanent magnet are bonded with an upper cover plate.

[0013] Preferably, both the left annular permanent magnet and the right annular permanent magnet are made of neodymium iron boron permanent magnet material.

[0014] Preferably, both the yoke and the inner ring are made of magnetic conductive material, and the cover plate is made of 1J38 iron-nickel alloy material.

[0015] Preferably, both the left annular permanent magnet and the right annular permanent magnet are magnetized in a radial magnetization manner, and the radial magnetization directions of the left annular permanent magnet and the right annular permanent magnet are opposite.

[0016] The small magnetic field assembly for a magnetron of the present utility model includes a left magnet assembly, a right magnet assembly and a base. The base connects the left magnet assembly and the right magnet assembly in a detachable manner; the left magnet assembly includes a left annular permanent magnet, a yoke, an inner ring and a cover plate; the left annular permanent magnet is formed by bonding a plurality of sector-shaped permanent magnets on the outer circle of the inner ring and the inner circle of the yoke; the right magnet assembly includes a right annular permanent magnet, a yoke, an inner ring and a cover plate. The right annular permanent magnet is formed by bonding a plurality of sector-shaped permanent magnets on the outer arc surface of the inner ring and the inner arc of the yoke; the magnetization direction of the right annular permanent magnet is opposite to that of the left annular permanent magnet. Through the left and right annular permanent magnets, the weight of the magnet assembly of the magnetron is greatly reduced, and by designing a radially radiating magnetic ring, a magnetic circuit is formed through magnetic conductive parts at the lower part, improving the magnetic field uniformity, so that the magnetic field reaches 240 mT to 270 mT. The conventional magnet with an up-down structure is adjusted to a structure of left and right annular permanent magnets, optimizing the installation method and making the installation process more convenient. Description of the Drawings

[0017] Figure 1 It is a schematic cross-sectional structure view of the small magnetic field assembly for a magnetron of the present utility model.

[0018] Reference numerals: 1 is a yoke; 2 is a left annular permanent magnet; 3 is an inner ring; 4 is a cover plate; 5 is a base; 6 is a right annular permanent magnet. Detailed Embodiments

[0019] The following further describes the present utility model in detail with reference to the attached Figure 1 :

[0020] Refer to the attached Figure 1As shown in the figure, a small magnetic field component for a magnetron includes a left magnet assembly, a right magnet assembly, and a base 5. The base 5 connects the left magnet assembly and the right magnet assembly in a detachable manner. The left magnet assembly includes a left annular magnet 2, a yoke 1, an inner ring 3, and a cover plate 4. The left annular magnet 2 is formed by bonding multiple sector-shaped magnets on the outer circle of the inner ring 3 and the inner circle of the yoke 1. The right magnet assembly includes a right annular magnet 6, a yoke 1, an inner ring 3, and a cover plate 4. The right annular magnet 6 is formed by bonding multiple sector-shaped magnets on the outer arc surface of the inner ring 3 and the inner arc of the yoke 1; the magnetization direction of the right annular magnet 6 is opposite to that of the left annular magnet 2.

[0021] The small magnetic field component for a magnetron of the present utility model is composed of three parts: a left magnet assembly, a right magnet assembly, and a base. The left magnet assembly and the right magnet assembly are respectively composed of a left annular magnet 2, a right annular magnet 6, a yoke 1, an inner ring 3, and a cover plate 4. The base 5 fixes the left and right magnet assemblies and forms a magnetic circuit, effectively improving the magnetic field uniformity. And the conventional up-and-down structure magnets are adjusted to the left and right annular magnet structure, optimizing the installation method and making the installation process more convenient.

[0022] The base 5 detachably connects the left magnet assembly and the right magnet assembly by means of screw connection and forms a magnetic circuit. The upper and lower end faces of the left annular magnet 2 are bonded with the cover plate 4, and the upper and lower end faces of the right annular magnet 6 are bonded with the cover plate 4. Both the left annular magnet 2 and the right annular magnet 6 adopt neodymium iron boron permanent magnet materials, which can greatly reduce the weight of the magnetron magnetic component, making the weight of the magnetron magnetic component reach within 400 g, improving the magnetic field uniformity, and making its magnetic field reach 240 mT - 270 mT.

[0023] Both the yoke 1 and the inner ring 3 adopt magnetic conductive materials, and the cover plate 4 adopts 1J38 iron-nickel alloy material. Both the left annular magnet 2 and the right annular magnet 6 are magnetized by means of radial magnetization, and the radial magnetization directions of the left annular magnet 2 and the right annular magnet 6 are opposite. A radial radiation magnetic ring is designed, and a magnetic circuit is formed through magnetic conductive parts at the lower part to improve the magnetic field uniformity.

[0024] In summary, there are a left magnet assembly, a right magnet assembly, and a base 5. The base 5 connects the left magnet assembly and the right magnet assembly in a detachable manner; the left magnet assembly includes a left annular magnet 2, a yoke 1, an inner ring 3, and a cover plate 4; the left annular magnet 2 is formed by bonding multiple sector-shaped magnets on the outer circle of the inner ring 3 and the inner circle of the yoke 1; the right magnet assembly includes a right annular magnet 6, a yoke 1, an inner ring 3, and a cover plate 4. The right annular magnet is formed by bonding multiple sector-shaped magnets on the outer arc surface of the inner ring 3 and the inner arc of the yoke 1; the magnetization direction of the right annular magnet 6 is opposite to that of the left annular magnet 2.

[0025] The small magnetic field assembly for a magnetron provided by the utility model is small in volume, light in weight, high in uniformity and reliability, and is a magnetic field assembly for an S-band 3050 MHz magnetron. By means of left and right annular magnets, the weight of the magnetron magnetic assembly is greatly reduced. And by designing a radially radiating magnetic ring and forming a magnetic circuit through a magnetic conduction part at the lower part, the uniformity of the magnetic field is improved, so that the magnetic field reaches 240 mT to 270 mT. The conventional magnet with an up-and-down structure is adjusted to a structure of left and right annular magnets, and the installation method is optimized, making the installation process more convenient.

Claims

1. A small magnetic field assembly for a magnetron, characterized in that: It comprises a left magnetic steel component, a right magnetic steel component and a base (5), wherein the base (5) connects the left magnetic steel component and the right magnetic steel component in a detachable manner; The left magnetic steel assembly comprises a left annular magnetic steel (2), a yoke (1), an inner ring (3) and a cover plate (4); the left annular magnetic steel (2) is composed of a plurality of sector-shaped magnetic steels bonded to the outer circle of the inner ring (3) and the inner circle of the yoke (1); The right magnetic steel assembly comprises a right annular magnetic steel (6), a yoke (1), an inner ring (3) and a cover plate (4); the right annular magnetic steel (6) is composed of a plurality of sector-shaped magnetic steels bonded to the outer arc surface of the inner ring (3) and the inner arc of the yoke (1); The magnetization direction of the right annular magnetic steel (6) is opposite to the magnetization direction of the left annular magnetic steel (2).

2. A small magnetic field assembly for a magnetron according to claim 1, characterized in that: The base (5) detachably connects the left magnetic steel assembly and the right magnetic steel assembly by means of screw connection, thereby forming a magnetic circuit.

3. The small magnetic field assembly for a magnetron according to claim 1, characterized in that: The upper and lower end surfaces of the left annular magnetic steel (2) are bonded to the upper cover plate (4), and the upper and lower end surfaces of the right annular magnetic steel (6) are bonded to the upper cover plate (4).

4. A small magnetic field assembly for a magnetron according to claim 3, characterized in that: The left annular magnetic steel (2) and the right annular magnetic steel (6) are both made of neodymium iron boron permanent magnet material.

5. The small magnetic field assembly for a magnetron according to claim 1, characterized in that: The yoke (1) and the inner ring (3) are both made of magnetic conductive material, and the cover plate (4) is made of 1J38 iron-nickel alloy material.

6. The small magnetic field assembly for a magnetron according to claim 1, characterized in that: The left annular magnetic steel (2) and the right annular magnetic steel (6) are both magnetized in a radial magnetization manner, and the radial magnetization directions of the left annular magnetic steel (2) and the right annular magnetic steel (6) are opposite.

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