11results about "Transit-tube cooling methods" patented technology

An insulative assembly for a microwave vacuum tube comprising: an oil tank and at least one high temperature or high voltage component arranged in the oil tank. The oil tank has an internal groove. The at least one high temperature or high voltage component is spaced apart from the internal groove within the oil tank; wherein the internal groove is configured to separate gas bubbles from the at least one high temperature or high voltage component within the oil tank during operation.

The invention discloses a phase change circulation heat dissipation device for a slow wave structure of a traveling wave tube and the traveling wave tube comprising the same, and relates to the technical field of microwave vacuum electronics, the heat dissipation device comprises an internal heat absorption unit integrated on a slow wave structure body base material, an external cooling unit arranged outside the traveling wave tube and a sealed circulation pipeline connecting the internal heat absorption unit and the external cooling unit, the three parts form a closed loop which is filled with a working medium. During working, the micro-scale flow channel of the internal heat absorption unit directly absorbs heat of the slow-wave structure, so that a working medium is vaporized; the steam flows to an external cooling unit for condensation and heat release under the action of pressure difference; condensate is driven by gravity and capillary force to flow back to the interior, and self-sustaining circulation is formed. Efficient heat dissipation under extremely high heat flux is achieved through phase change latent heat, the vacuum compatibility problem is thoroughly solved through closed independent circulation, the structure is compact, external strong driving force is not needed, the working stability of the traveling wave tube is remarkably improved, and the service life of the traveling wave tube is remarkably prolonged.

A magnetron and microwave heating device, wherein the magnetron includes a tube core (21), a first tube shell (21a), a second tube shell (21b), an output ceramic (22), an antenna cap (23), and an antenna (24), wherein the first tube shell (21a), the tube core (21), the second tube shell (21b), the output ceramic (22), and the antenna cap (23) are connected in sequence, and the antenna (24) enters the tube core (21), and then enters the antenna cap (23) sequentially through the second tube shell (21b) and the output ceramic (22), and a height H1 of the second tube shell (21b) relative to the tube core (21) is 14 mm or less, and a ratio H1 / S of the height H1 of the tube core (21) to a cross-sectional area S of the antenna (24) is within a range of 0.4 to 3.3.

This invention discloses a coaxial magnetron with an externally loaded metamaterial, comprising, from the inside out, an anode blade assembly, an anode cylinder, a metamaterial layer, and an outer cylinder. The anode blade assembly consists of multiple anode blades arranged in a uniform ring array, with adjacent anode blades forming a resonant inner cavity. The anode cylinder is fitted outside the anode blade assembly, and its wall has multiple coupling slots. The anode cylinder and the outer cylinder form a coaxial outer cavity, and the inner and outer cavities are connected and communicate with each other through the coupling slots. The metamaterial layer is disposed between the anode cylinder and the outer cylinder to connect the two. The metamaterial layer consists of multiple metamaterial units arranged in a ring array, and each metamaterial unit is a copper sheet with a hollow dumbbell pattern. This invention improves the compactness of the coaxial magnetron while ensuring efficiency, suppresses the competitive mode of the coaxial magnetron, and enhances the anode heat dissipation performance of the coaxial magnetron.

An insulative assembly (130) for a microwave vacuum tube (1204) comprising: an oil tank (1202) and at least one high temperature or high voltage component (1208) arranged in the oil tank. The oil tank (1202) has an internal groove (1210). The at least one high temperature or high voltage component is spaced apart from the internal groove within the oil tank; wherein the internal groove is configured to separate gas bubbles (1212) from the at least one high temperature or high voltage component within the oil tank during operation.

A gyrotron system (1) comprises a housing (2), an electron gun (3) configured to produce an electron beam, at least one magnet (4) configured to produce a magnetic field, and a cavity (5) configured to receive the electron beam, and wherein microwaves and / or Terahertz waves (16) are generatable in the cavity (5) by a resonance coupling between the electron beam and the magnetic field produced by the magnet (4). The magnet (4) is a superconducting magnet that is configured to exhibit superconductivity upon cooling below its critical temperature and that is arranged around the cavity (5), and the cavity (5) and the superconducting magnet (4) are arranged within the housing (2).

A coaxial window inner conductor cooling structure provided by the present invention comprises a coaxial window, the coaxial window comprises an annular window sheet, an outer conductor sealed on the outer peripheral surface of the window sheet and an inner conductor sealed on the inner peripheral surface of the window sheet, and the inner conductor comprises an inner cavity; the output waveguide is vertically communicated with the coaxial window; the waveguide coaxial conversion structure is connected with the inner conductor and the output waveguide; the waveguide coaxial conversion structure comprises a channel communicated with the inner cavity; the liquid cooling assembly comprises a matching piece arranged on the outer side of the output waveguide and a hollow liquid cooling pipe extending into the inner cavity in the axial direction of the coaxial window; the matching piece is provided with a liquid inlet and a liquid outlet; the output waveguide is provided with a communicating hole; one end of the liquid cooling pipe extends into the inner cavity and is provided with a liquid outlet hole communicated with the inner cavity, and the other end of the liquid cooling pipe penetrates through the channel and the communication hole and then extends into the matching piece to be communicated with the liquid inlet, so that the interior of the liquid cooling pipe, the inner cavity and the channel jointly form a cooling circulation path.

The coaxial magnetron with the metamaterial loaded in the outer cavity comprises an anode blade set, an anode cylinder, a metamaterial layer and an outer cylinder which are sequentially arranged from inside to outside, the anode blade set is composed of a plurality of anode blades which are annularly and evenly arranged in an array mode, and a resonance inner cavity is formed between every two adjacent anode blades; the anode cylinder is arranged outside the anode blade group in a sleeving manner, a plurality of coupling gaps are formed in the cylinder wall of the anode cylinder, a coaxial outer cavity is formed between the anode cylinder and the outer cylinder, and the inner cavity and the outer cavity are connected and communicated through the coupling gaps; the metamaterial layer is arranged between the anode cylinder and the outer cylinder and is used for connecting the anode cylinder and the outer cylinder; the metamaterial layer is formed by arranging a plurality of metamaterial units in an annular array, and the metamaterial units are metal copper sheets with hollow dumbbell patterns. On the premise of ensuring the efficiency, the compactness of the coaxial magnetron is improved, the competition mode of the coaxial magnetron is inhibited, and the anode heat dissipation performance of the coaxial magnetron is enhanced.

A magnetron and a microwave heating device. The magnetron comprises a tube core (21), a first tube housing (21a), a second tube housing (21b), output ceramic (22), an antenna cap (23), and an antenna (24). The first tube housing (21a), the tube core (21), the second tube housing (21b), the output ceramic (22) and the antenna cap (23) are connected in sequence. The antenna (24) extends into the tube core (21), and sequentially passes through the second tube housing (21b) and the output ceramic (22) and then extends into the antenna cap (23). The height H1 of the second tube housing (21b) relative to the tube core (21) is not greater than 14 millimeters, and the ratio H1 / S of the height H1 of the tube core (21) to the cross-sectional area S of the antenna (24) is within the range of 0.4 to 3.3.

The invention relates to the technical field of microwave vacuum electronic devices, and discloses a Ka-frequency-band 500W high-efficiency and light-weight conduction type space traveling wave tube which comprises a bottom plate, an electron gun body, an interaction structure, a collector body, an input energy transmission system and an output energy transmission system, and the electron gun body, the interaction structure, the collector body and the input energy transmission system are installed on the bottom plate. A frame-type support is arranged in the middle of the bottom plate to enhance supporting. In the interaction structure, the clamping rods are distributed in a delta shape and are in cambered surface contact with the spiral line, and the contact thermal resistance is reduced in cooperation with the thread pitch jump design of the spiral line; the output energy transmission system is of a box-shaped window structure, an output inner conductor of the output energy transmission system is made of annealed oxygen-free copper with a hole in the center, the end of the output inner conductor is designed to be small in outer diameter, thermal stress is released, and the risk of cracking between the output inner conductor and an output antenna is avoided. And the collector body is internally provided with a plurality of stages of voltage reduction electrodes for recovering energy. By optimizing the heat dissipation path and the structural stress design, the problems of heat dissipation bottleneck and window failure of the high-power traveling wave tube are solved, and the reliability and the output power of the device are improved.

The application discloses a coaxial-circular waveguide output structure of a coaxial gyrotron traveling wave tube, and relates to the field of microwave and millimeter wave passive devices. The structure comprises a coaxial outer conductor, a coaxial inner conductor and a support structure arranged between the coaxial outer conductor and the coaxial inner conductor. The support structure comprises a plurality of circumferentially distributed support units. The width of the support units increases first and then decreases along the axial direction. The middle sections of adjacent support units are rectangular waveguide cavities. The coaxial inner conductor is provided with two cavities which are connected at two ends. The coaxial inner conductor, the support units and the coaxial outer conductor are provided with through holes which are used for injecting cooling liquid into one cavity and making the cooling liquid flow out of the other cavity. The application solves the support problem of the output part of the coaxial gyrotron traveling wave tube by using the support structure, and has the advantages of wide band and high mode conversion efficiency. In addition, the through holes and the cavity structure are arranged to realize the cooling of the output part of the coaxial gyrotron traveling wave tube.