High-power microwave driving source primary switch heat dissipation device

Abstract

The invention discloses a heat dissipation device for a primary switch of a high-power microwave driving source, and relates to the field of high-power microwave conduction, the heat dissipation device is arranged on the outer side of the high-power microwave driving source and communicated with the interior of the high-power microwave driving source, heat dissipation can be effectively carried out on a switch electrode, and cooling gas filled in a guide pipe can cool the switch electrode under the action of a gas pump. And heat generated by the switch electrode is taken away, so that the working stability of the switch electrode is greatly improved, the service life of the switch electrode is greatly prolonged, and the fault occurrence probability caused by overheating is reduced.

Description

Technical Field

[0001] The present invention relates to the field of high-power microwave conduction, and particularly to a primary switch heat dissipation device for a high-power microwave driver source. Background Art

[0002] In the field of high-power microwave technology, as a core component of the driver source, the heat dissipation problem of the primary switch directly affects the reliability and service life of the equipment. The current mainstream heat dissipation technologies mainly include the following types:

[0003] Liquid cooling heat dissipation system, which uses ethylene glycol aqueous solution or transformer oil as the cooling medium and takes away the heat of the switch electrode through a circulating pipeline. Such a system can control the temperature rise within 50°C in a 100kW-class microwave device and is widely used in industrial heating and medical equipment.

[0004] Air cooling heat dissipation system, which uses a fan to force air flow and enhances heat exchange through heat dissipation fins. It has a lower cost in equipment with a power level below 30kW and is commonly found in mobile communication base stations and laboratory instruments.

[0005] Phase change heat dissipation device, which uses heat pipes or boiling cooling technology and utilizes the latent heat of phase change of the medium to improve the heat dissipation efficiency. In high-power laser equipment, a heat flux density of more than 100W / cm 2 can be achieved, which is suitable for scenarios with limited space.

[0006] Problems existing in the prior art:

[0007] Insufficient insulation safety. The conductive liquid used in the liquid cooling system has a risk of electric leakage in a high-voltage environment. A certain type of radar equipment once suffered a switch short circuit due to coolant leakage, and the maintenance cost was as high as 35% of the original value of the equipment.

[0008] Limited heat dissipation efficiency. The air cooling system is significantly affected by the ambient temperature. In a high-temperature environment above 40°C, the heat dissipation capacity decreases by 60%, and it cannot meet the all-weather operation requirements of outdoor equipment.

[0009] High structural complexity. The phase change heat dissipation device requires a precise vacuum packaging process. The heat dissipation of a certain microwave source for aerospace failed due to the cracking of the heat pipe weld, and the failure rate was 2 times higher than that of the traditional system.

[0010] High maintenance cost. The liquid cooling system needs to regularly replace the coolant. The annual maintenance cost of a certain industrial microwave heating equipment accounts for 22% of the operating cost, and the shutdown for maintenance affects the production efficiency.

[0011] Large dynamic response lag. The response time of the traditional heat dissipation system exceeds 10 seconds, and it cannot adapt to high-power microwave equipment with a pulse width less than 5μs, resulting in the instantaneous temperature peak of the switch electrode exceeding the material tolerance limit. Summary of the Invention

[0012] The object of the present invention is: aiming at the above problems, the present invention provides a heat dissipation device for the primary switch of a high-power microwave driving source, which combines sulfur hexafluoride insulating gas with a self-circulating pressure pump, and cooperates with a tube-winding structure and a sealed plugging technology to control the temperature rise of the switch electrode within 25°C, and the heat dissipation efficiency is increased by 300% compared with the traditional air-cooling system. It can withstand a pulse power of 100 MW, effectively solving the core problems existing in the prior art such as insulation safety hazards, low heat dissipation efficiency, and high maintenance costs, and providing a new heat dissipation solution for high-power microwave equipment.

[0013] The technical solution adopted by the present invention is as follows:

[0014] A heat dissipation device for the primary switch of a high-power microwave driving source, the device is arranged outside the high-power pulse driving source and dissipates heat from the switch electrode by connecting to the inside of the high-power driving source. The device includes:

[0015] A conduit, the conduit includes an input conduit and an output conduit, the input conduit and the output conduit are respectively connected to the output end and the output end of the high-power pulse driving source, and the conduit is filled with a cooling gas;

[0016] A gas pump, the gas pump connects the input conduit and the output conduit.

[0017] Due to the adoption of the above technical solution, the heat dissipation device is arranged outside the high-power pulse driving source and connected to its inside, and can effectively dissipate heat from the switch electrode. The cooling gas filled in the conduit circulates in the input conduit and the output conduit under the action of the gas pump, taking away the heat generated by the switch electrode, greatly improving the working stability and service life of the switch electrode, and reducing the probability of failures caused by overheating.

[0018] Further, the cooling gas includes sulfur hexafluoride gas.

[0019] Due to the adoption of the above technical solution, sulfur hexafluoride gas has good insulation performance and heat dissipation performance. It can effectively take away heat while avoiding discharge phenomena in a high-voltage environment, ensuring the electrical insulation safety of the high-power microwave driving source, and further enhancing the reliability of the entire driving source system.

[0020] Further, the gas pump is a self-circulating pressure pump.

[0021] Due to the adoption of the above technical solution, the self-circulating pressure pump can automatically maintain the circulation flow and pressure stability of the cooling gas in the conduit. It can automatically adjust the flow rate and pressure of the gas according to the heat generation situation of the switch electrode, ensure the stability of the heat dissipation effect, and improve the overall performance and energy-saving effect of the heat dissipation device.

[0022] Further, the catheter is arranged around the outer tube of the high-power pulse driving source.

[0023] Due to the adoption of the above technical solution, the catheter is arranged around the outer tube of the high-power pulse driving source, increasing the contact area and contact time between the cooling gas and the outer tube of the driving source. This enables the cooling gas to more fully absorb the heat generated by the driving source, improves the heat dissipation efficiency, and can more effectively reduce the temperature of the driving source.

[0024] Further, the input catheter and the output catheter have the same length.

[0025] Due to the adoption of the above technical solution, the input catheter and the output catheter have the same length, ensuring the pressure balance and uniform flow rate of the cooling gas during the circulation process. This enables the cooling gas to flow stably in the catheter, avoiding problems such as poor gas flow and uneven heat dissipation caused by differences in catheter length, and improving the uniformity and stability of heat dissipation.

[0026] Further, the connection methods of the catheter with the gas pump and the high-power pulse driving source are both plug-in connections, and sealing strips are wrapped around their insertion interfaces.

[0027] Due to the adoption of the above technical solution, the catheter is connected to the gas pump and the high-power pulse driving source by plug-in connections, and sealing strips are wrapped around the insertion interfaces, ensuring the sealing performance of the connection. This can prevent the leakage of the cooling gas, ensure that the cooling gas can circulate in a closed system, and improve the working efficiency of the heat dissipation device. At the same time, good sealing performance also avoids the entry of external dust and moisture into the system, protects the internal components, extends the service life of the heat dissipation device, and improves the reliability and stability of the entire heat dissipation system.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0029] A primary switch heat dissipation device for a high-power microwave driving source of the present invention can efficiently carry away the heat generated by the switch electrode through the circulation of the cooling gas in the catheter. The catheter is arranged around the outer tube of the high-power pulse driving source, increasing the contact area and contact time between the cooling gas and the outer tube of the driving source, enabling the cooling gas to more fully absorb heat. Sulfur hexafluoride gas is used as the cooling gas, taking advantage of its good insulation performance to avoid discharge phenomena in a high-voltage environment. The self-circulating pressure pump can automatically maintain the circulation and pressure stability of the cooling gas in the catheter. The pressure pump can automatically adjust the flow rate and pressure of the gas according to the heat generation situation of the switch electrode to ensure the stability of the heat dissipation effect. The heat dissipation device has a relatively simple structure and good sealing performance, reducing the maintenance requirements caused by leakage and failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a schematic structural diagram of a heat dissipation device for the primary switch of a high-power microwave driving source according to the present invention.

[0031] Figure 2 It is the front view of a heat dissipation device for the primary switch of a high-power microwave driving source according to the present invention.

[0032] Markings in the figure: 1 - driving source, 2 - input conduit, 3 - output conduit, 4 - gas pump. Specific implementation manner

[0033] The present invention will be described in detail below with reference to the accompanying drawings.

[0034] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] Embodiment

[0036] This embodiment provides a heat dissipation device for the primary switch of a high-power microwave driving source. As shown in Figure 1 and Figure 2 The device is arranged outside the high-power pulse driving source and dissipates heat from the switch electrode by connecting to the inside of the high-power driving source. Specifically, it includes:

[0037] Conduits, including an input conduit and an output conduit. The input conduit and the output conduit are respectively connected to the output end and the output end of the high-power pulse driving source. The conduits are filled with a cooling gas. In this embodiment, sulfur hexafluoride gas is selected as the cooling gas, and insulating cooling gases such as perfluoroisobutyronitrile can also be used. The conduits are arranged around the outer tube of the high-power pulse driving source. The connection methods between the conduits and the gas pump and the high-power pulse driving source are all pluggable, and sealing strips are wrapped around their insertion interfaces. The conduits are connected to the gas pump and the high-power pulse driving source in a pluggable manner, and sealing strips are wrapped around the insertion interfaces, ensuring the connection tightness. This can prevent the leakage of the cooling gas, ensure that the cooling gas can circulate in a closed system, and improve the working efficiency of the heat dissipation device. At the same time, good tightness also prevents external dust and moisture from entering the system, protects the internal components, extends the service life of the heat dissipation device, and improves the reliability and stability of the entire heat dissipation system.

[0038] Gas pump, the gas pump selects a self-circulating pressure pump body. The self-circulating pressure pump can automatically maintain the circulation flow and pressure stability of the cooling gas in the conduits. It can automatically adjust the flow rate and pressure of the gas according to the heat generation situation of the switch electrode to ensure the stability of the heat dissipation effect. The gas pump connects the input conduit and the output conduit.

[0039] The specific installation method of this embodiment is as follows:

[0040] Prepare the input conduit 2 and the output conduit 3, ensuring that the inner diameter and length of the conduits meet the design requirements; connect one end of the input conduit 2 to the input end of the high-power pulse driving source 1 by plugging, and wrap a sealing strip at the plug interface to ensure good sealing and prevent the leakage of cooling gas; similarly, connect one end of the output conduit 3 to the output end of the high-power pulse driving source 1 in the same way.

[0041] Closely wind the input conduit 2 and the output conduit 3 around the outer tube of the high-power pulse driving source 1, and pay attention to the uniform winding of the conduits to ensure that the cooling gas can fully contact the outer tube of the driving source and improve the heat dissipation efficiency.

[0042] Connect the two interfaces of the gas pump 4 to the other ends of the input conduit and the output conduit respectively by plugging, and wrap a sealing strip at the plug interface; after the connection is completed, ensure that the connection between the gas pump and the conduit is firm and there is no loosening phenomenon. The gas pump 4 is selected as a self-circulating pressure pump.

[0043] Fill sulfur hexafluoride gas into the conduit through the gas injection port on the gas pump 4. During the filling process, pay attention to controlling the pressure and flow rate of the gas to make it meet the design requirements. After the filling is completed, check whether there is any leakage in the system.

[0044] Selecting sulfur hexafluoride gas can prevent the internal switch electrodes from being oxidized due to high-voltage and high-temperature parameters, affecting the electrode effect. The self-circulating pressure pump can adjust the gas flow rate according to the temperature change at any time, and adjust the internal temperature to the best operating condition of the electrode switch, which is less than 10°C. Solve the heat dissipation problem of the primary switch of the microwave driving source. Through the self-circulating design of the pressure pump and sulfur hexafluoride gas, the problem of the emission source quality caused by excessive temperature during the operation of the primary switch of the driving source is effectively solved.

[0045] Specific embodiments are applied in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0047] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "install", "connected", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A high-power microwave drive source primary switch heat dissipation device, characterized in that: The device is arranged outside the high-power pulse drive source, and dissipates heat for the switch electrode by connecting to the inside of the high-power drive source. The device comprises: A conduit, the conduit comprising an input conduit and an output conduit, the input conduit and the output conduit are respectively connected to an output end and an output end of a high-power pulse drive source, and the conduit is filled with cooling gas; A gas pump is connected between the input conduit and the output conduit.

2. A high-power microwave drive source primary switch heat dissipation device according to claim 1, characterized in that: The cooling gas includes sulfur hexafluoride gas.

3. A high-power microwave drive source primary switch heat dissipation device according to claim 1, characterized in that: The gas pump is a self-circulating pressure pump.

4. A high-power microwave drive source primary switch heat dissipation device according to claim 1, characterized in that: The catheter is arranged around the outer tube of the high-power pulse driving source.

5. The high-power microwave drive source primary switch heat dissipation device according to claim 1, characterized in that: The input conduit and the output conduit have the same length.

6. A high-power microwave drive source primary switch heat dissipation device according to claim 1, characterized in that: The connection modes of the conduit and the gas pump and the high-power pulse driving source are all plug-in, and the plug-in interfaces are all wrapped with sealing strips.

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