High-power microwave transmission line rotary joint

Abstract

The invention discloses a high-power microwave transmission line rotary joint, and relates to the field of high-power microwave conduction, an output shaft and an input shaft which are coaxially connected are adopted, and an insertion connection structure is designed and comprises insertion ports with different diameters, bushings, O-shaped sealing rings and the like, so that the stability and the coaxiality of shaft connection are enhanced, and the signal loss is reduced; the joint copper ring and the joint beryllium copper are selected as conduction parts, and good conductivity of the joint copper ring and the joint beryllium copper is utilized, so that resistance heat loss is reduced, and signal transmission efficiency is improved; meanwhile, by means of the design of the joint conductive contact finger and the hook-shaped or conical beryllium copper, guiding and positioning of assembly are optimized, convenience and accuracy of assembly are improved, perfect sealing protection measures are further arranged, a series of problems existing in the prior art are effectively solved, and the service life of the connector is prolonged. And a more reliable and efficient rotary joint solution is provided for high-power microwave transmission.

Description

Technical Field

[0001] The invention relates to the field of high-power microwave conduction, in particular to a high-power microwave transmission line rotary joint. Background Art

[0002] In the field of high-power microwave transmission, the performance of rotary joints, as key components that connect different transmission components and allow them to rotate relative to each other, directly affects the operation of the entire microwave system.

[0003] Traditional high-power microwave transmission line rotary joints have many defects in structural design. On the one hand, the connection between the shafts is relatively simple, mostly using simple sleeves or welding. Taking sleeves as an example, the connection stability is maintained only by the friction between the shafts. During the high-power microwave transmission process, due to factors such as equipment vibration and temperature changes, the connection is very likely to become loose, which not only makes it difficult to ensure the coaxiality of microwave signal transmission, but also causes a sharp increase in signal reflection and loss, seriously affecting the transmission efficiency. Frequent loose connections also require shutdown for maintenance, greatly reducing the reliability and continuity of the system. Although welding connections can enhance the stability of the connection to a certain extent, the welding process is prone to introduce stress concentration. When used for a long time or subjected to external force impact, cracks may occur in the welding parts, which will also cause signal transmission failures.

[0004] In terms of conducting components, the materials used by traditional rotary joints to conduct microwave signals are not properly selected. Common metal materials have limited conductivity and high resistance. When microwave signals pass through, they will generate a lot of heat. According to Joule's law (Q = I 2 Rt, where Q represents heat, I is current intensity, R is resistance, and t is time). This heat not only wastes energy and reduces the transmission power of microwave signals, but may also cause deformation of components due to overheating, further affecting the stability of signal transmission. In addition, traditional rotary joints are poorly sealed and protected, lacking effective dust and water vapor prevention measures. External dust, water vapor and other impurities can easily invade the interior of the joint and adhere to the surface of the conductive parts, forming a poorly conductive dirt layer, which aggravates the obstruction of signal transmission and may even cause serious faults such as short circuits.

[0005] Furthermore, the assembly structure of traditional rotary joints is not sophisticated enough and lacks effective guidance and positioning design. During the process of connecting shafts and assembling transmission components, operators often need to spend a lot of time debugging to barely ensure the accuracy of the connection. Even so, problems may still arise in subsequent use due to slight displacement deviations, resulting in poor signal transmission. Summary of the invention

[0006] The purpose of the present invention is: in view of the above-mentioned problems, the present invention provides a high-power microwave transmission line rotating joint, which adopts a coaxially connected output shaft and input shaft, and designs a plug-in connection structure, including plug interfaces, bushings and O-rings of different diameters, so as to enhance the stability and coaxiality of the connection between the shafts and reduce the signal loss; joint copper rings and joint beryllium copper are selected as conductive components, and their good conductivity is utilized to reduce the resistance heat loss and improve the signal transmission efficiency; at the same time, by virtue of the design of the joint conductive contact fingers, hook-shaped or conical beryllium copper, the assembly guidance and positioning are optimized, the assembly convenience and accuracy are improved, and perfect sealing protection measures are also provided.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A high-power microwave transmission line rotary joint, the rotary joint specifically comprising:

[0009] An output shaft and an input shaft connected coaxially;

[0010] The end of the output shaft connected to the input shaft is sleeved with a joint copper ring, and the joint copper ring is used to conduct microwave signals;

[0011] The end portion where the input shaft is connected to the output shaft is provided with a joint beryllium copper, and the joint beryllium copper is connected to the joint copper ring for conducting microwave signals.

[0012] Due to the adoption of the above technical solution, the coaxial connection structure between the output shaft and the input shaft ensures the stability and accuracy of microwave signal transmission and reduces signal reflection and loss. The setting of the joint copper ring provides a good conduction channel for microwave signals and can efficiently conduct signals from the input shaft to the output shaft; the joint beryllium copper is connected to the joint copper ring, which further ensures the conduction of microwave signals and improves the reliability of signal transmission by utilizing the good conductivity and elasticity of beryllium copper.

[0013] Furthermore, the output shaft is plug-connected with the input shaft.

[0014] Due to the adoption of the above technical solution, the plug-in connection between the output shaft and the input shaft makes the connection between the two tighter and more stable, and can better ensure coaxiality, thereby reducing the distortion and attenuation of microwave signals during transmission and improving the quality of signal transmission.

[0015] Furthermore, the ends where the output shaft is connected to the input shaft are respectively provided with cylindrical plug-in interfaces with a diameter smaller than that of the shaft body, and the plug-in interfaces respectively located on the output shaft and the input shaft have different diameters, and the output shaft and the input shaft are plug-connected through the plug-in interfaces.

[0016] Due to the adoption of the above technical solution, the cylindrical plug-in interface design with different diameters not only facilitates the plug-in operation of the output shaft and the input shaft, but also plays a certain role in positioning, limiting and guiding, ensuring the accurate connection between the two and improving the efficiency and accuracy of assembly. At the same time, this structure also enhances the stability of the connection, reduces the loose connection caused by factors such as vibration, and ensures the stable transmission of microwave signals.

[0017] Furthermore, the plug interface is sleeved with a bushing and an O-ring.

[0018] Due to the adoption of the above technical scheme, the bushing can protect the plug interface, reduce wear, and extend the service life of the output shaft and the input shaft. At the same time, the bushing not only ensures the concentricity of the output shaft and the input shaft, but also limits the distance between the output shaft and the input shaft. Because the joint beryllium copper is a spring-like structure with a soft texture, the distance between the output shaft and the input shaft is controlled by using the bushing to avoid the output shaft and the input shaft being too close to deform the beryllium copper and causing failure. The O-ring can effectively prevent impurities such as dust and water vapor from entering the plug interface, avoiding signal transmission failures caused by impurities. At the same time, it can also play a certain sealing and buffering role, thereby improving the reliability and stability of the rotary joint.

[0019] Furthermore, the joint copper is connected to the output shaft by a plurality of screws around its circumference to form an integral structure.

[0020] Due to the adoption of the above technical solution, the joint copper ring and the output shaft are connected into an integrated structure by screws, so that the connection between the joint copper ring and the output shaft is more secure, which can ensure that the joint copper ring rotates synchronously with the output shaft during rotation, avoiding the problem of unstable signal transmission caused by relative sliding, and ensuring that the microwave signal can be stably transmitted through the joint copper ring.

[0021] Furthermore, a joint conductive contact finger is provided along the axial direction of the end of the input shaft connected to the joint beryllium copper, and the joint beryllium copper is mounted on the joint conductive contact finger.

[0022] Due to the adoption of the above technical solution, the setting of the joint conductive contact finger increases the conductive contact area between the joint beryllium copper and the input shaft, and improves the transmission efficiency of the microwave signal from the input shaft to the joint beryllium copper. At the same time, the joint beryllium copper is placed on the joint conductive contact finger, making the contact between the two closer and more stable, reducing the contact resistance, and further ensuring good signal conduction.

[0023] Furthermore, one end of the joint conductive contact is plugged into the input shaft, and a socket is preset at the end of the input shaft to cooperate with the joint conductive contact. One end of the joint beryllium copper is arranged close to the socket. When the joint conductive contact is connected with the socket, the joint beryllium copper is pressed onto the input shaft, and the other end of the joint beryllium copper is placed on the end of the joint conductive contact away from the input shaft and connected to the joint copper ring.

[0024] Due to the adoption of the above technical scheme, the plug-in cooperation between the joint conductive contact finger and the input shaft and the pressing effect on the joint beryllium copper ensure the reliable connection and good conductivity between the joint beryllium copper and the input shaft; at the same time, the other end of the joint beryllium copper is connected to the joint copper ring, realizing the stable conduction of microwave signals from the input shaft to the joint copper ring. The entire connection structure is compact and reliable, thereby improving the performance of the rotary joint.

[0025] Furthermore, the beryllium copper of the joint is located at one end of the joint conductive contact finger away from the input shaft and is a hook-shaped structure for guiding the plugging process.

[0026] Due to the adoption of the above technical solution, the hook-shaped structure of the joint beryllium copper plays a good guiding role during the plug-in process, so that the joint beryllium copper can be more accurately and smoothly connected to the joint conductive contact fingers and the joint copper ring, thereby improving the efficiency and accuracy of assembly, and also reducing signal transmission problems caused by improper assembly.

[0027] Furthermore, the joint beryllium copper is a spring-shaped beryllium copper with a groove structure.

[0028] Due to the adoption of the above technical solution, the spring-shaped beryllium copper with a groove structure has good elasticity and conductivity. The elasticity enables the joint beryllium copper to maintain a close fit when in contact with the joint conductive contact finger and the joint copper ring, reducing contact resistance and improving signal conduction efficiency; the groove structure allows the formed rotating section to form a larger effective path.

[0029] Furthermore, the joint beryllium copper is a conical beryllium copper, which is used for guiding during the plug-in process.

[0030] Due to the adoption of the above technical solution, the design of the conical beryllium copper plays an effective guiding role in the plug-in process, making it easier to insert the joint beryllium copper into the corresponding connection part, thereby improving the convenience and accuracy of assembly; at the same time, the conical structure also helps to achieve gradually close contact during the connection process, ensuring good conductivity and signal transmission effects.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] The high-power microwave transmission line rotary joint of the present invention adopts a coaxially connected output shaft and input shaft, and designs a plug-in connection structure, including plug interfaces, bushings and O-rings of different diameters, thereby enhancing the stability and coaxiality of the connection between the shafts and reducing signal loss; joint copper rings and joint beryllium copper are selected as conductive components, and their good conductivity is utilized to reduce resistive heat loss and improve signal transmission efficiency; at the same time, by virtue of the joint conductive contact fingers, hook-shaped or conical beryllium copper and other designs, the assembly guidance and positioning are optimized, the assembly convenience and accuracy are improved, and perfect sealing protection measures are also provided, which effectively solves the above-mentioned series of problems existing in the prior art and provides a more reliable and efficient rotary joint solution for high-power microwave transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a high-power microwave transmission line rotary joint of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the beryllium copper in the joint of a high-power microwave transmission line rotary joint of the present invention;

[0035] Figure 3 It is a schematic diagram of the connection structure between the joint beryllium copper and the joint conductive contact finger in a high-power microwave transmission line rotary joint of the present invention.

[0036] Markings in the figure: 1- output shaft, 2- input shaft, 3- joint copper ring, 4- joint beryllium copper, 5- bushing, 6- joint conductive contact finger. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.

[0039] Example

[0040] This embodiment provides a high-power microwave transmission line rotary joint, which is a single-channel rotary joint, such as Figure 1 As shown, specifically including:

[0041] An output shaft 1 and an input shaft 2 are coaxially plug-in connected; the ends of the output shaft 1 and the input shaft 2 are respectively provided with cylindrical plug-in interfaces with a diameter smaller than the shaft body thereof, and the plug-in interfaces located on the output shaft 1 and the input shaft 2 have different diameters, and the output shaft 1 and the input shaft 2 are plug-in connected via the plug-in interfaces, specifically, the input shaft 2 is connected to the azimuthally rotating part by screws, and the microwave energy is transmitted to the input shaft 2 through the azimuthally rotating part by the entire internal structure, the output shaft 1 is connected to the input shaft 2 by plug-in, and the other end thereof is also connected to the main structure by screws, and the plug-in interface is sleeved with a bushing 5 and an O-ring, which functions as a movable seal.

[0042] The end of the output shaft 1 connected to the input shaft is sleeved with a joint copper ring 3, and the joint copper ring 3 is connected to the output shaft 1 through a plurality of screws to form an integral structure, and the joint copper ring 3 is used to conduct microwave signals;

[0043] The end of the input shaft 2 connected to the output shaft 1 is sleeved with the joint beryllium copper 4, and the joint beryllium copper 4 is connected to the joint copper ring 3 for conducting microwave signals. The joint conductive contact finger 6 presses the joint beryllium copper 4 onto the input shaft 2. The joint conductive contact finger 6 is evenly arranged around the joint beryllium copper 4 and is locked with a screw; one end of the joint conductive contact finger 6 is plugged into the input shaft 2, and the end of the input shaft 2 is preset with a socket that cooperates with the joint conductive contact finger 6. One end of the joint beryllium copper 4 is arranged close to the socket. When the joint conductive contact finger 6 is connected to the socket, the joint beryllium copper 4 is pressed onto the input shaft 2, and the other end of the joint beryllium copper 4 is overlapped on the end of the joint conductive contact finger away from the input shaft and connected to the joint copper ring. In this embodiment, the joint copper ring 3 and the joint beryllium copper 4 are overlapped. The joint beryllium copper position 4 is a hook-shaped structure at the end of the joint conductive contact 6 away from the input shaft, that is, a section of the joint beryllium copper 4 close to the joint copper ring 3 is hook-shaped, the purpose of which is to guide the rounded corners during the plug-in process. The joint beryllium copper 4 is a spring-shaped beryllium copper with a groove structure, so that the formed rotating section constitutes a larger effective path.

[0044] The specific construction process of the structure of this embodiment is as follows:

[0045] like Figure 2 and Figure 3 As shown, a copper joint copper ring 3 for contact is fixed on the output shaft 1, and a copper joint beryllium copper 4 for contact is also fixed on the input shaft 2. The output shaft 1 and the input shaft 2 are restricted to the same axis in advance by using a bushing 5, and the inside of the output shaft 1 and the input shaft 2 are sealed with an O-type rubber sealing ring. Under the condition of ensuring coaxiality and sealing, the conical slots made of the joint beryllium copper 4 and the spring-shaped beryllium copper belt are used for conduction during the rotation process, so that the sealing can be ensured while rotating, and the transmission of the microwave band on a single channel can be ensured.

[0046] A copper conductive structure is fixed on the output shaft 1 and the input shaft 2. The joint copper ring 3 and the joint beryllium copper 4 are the transmission setting interfaces of the microwaves to ensure the concentricity of the inner and outer interfaces of the coaxial line to achieve the purpose of obtaining a good standing wave ratio.

[0047] The bushing 5 not only limits the position of the output shaft 1 and the input shaft 2, but also ensures the concentricity of the two shafts; a plurality of grooves are also provided on the bushing 5 to achieve a movable sealing effect.

[0048] In summary, the rotary joint of this embodiment adopts a coaxially connected output shaft and input shaft. This structure can maximize the consistency of the microwave signal transmission path and reduce signal reflection and loss caused by inter-axis deviation. For example, in satellite communications, radar monitoring and other systems, compared with traditional non-coaxially connected rotary joints, signal transmission loss can be reduced by about 20%-30%, which greatly improves the transmission efficiency of high-power microwave signals and enables more energy to be effectively transmitted to the target end.

[0049] The joint copper ring and joint beryllium copper have good conductivity. As a key component for transmitting microwave signals, the joint copper ring can provide a low-resistance conduction channel for the signal. The joint beryllium copper not only has good conductivity, but also has a certain elasticity, and can be in close contact with the joint copper ring and the joint conductive contact finger, further reducing the contact resistance, thereby reducing the energy loss of the signal during the transmission process.

[0050] The principles and implementation methods of the present invention are described in this article using specific embodiments. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A high-power microwave transmission line rotary joint, characterized in that: The rotary joint specifically comprises: An output shaft and an input shaft connected coaxially; The end of the output shaft connected to the input shaft is sleeved with a joint copper ring, and the joint copper ring is used to conduct microwave signals; The end portion where the input shaft is connected to the output shaft is provided with a joint beryllium copper, and the joint beryllium copper is connected to the joint copper ring for conducting microwave signals.

2. A high-power microwave transmission line rotary joint according to claim 1, characterized in that: The output shaft is plug-connected with the input shaft.

3. A high-power microwave transmission line rotary joint according to claim 2, characterized in that: The ends where the output shaft is connected to the input shaft are respectively provided with cylindrical plug-in ports with a diameter smaller than the shaft body, and the plug-in ports located at the output shaft and the input shaft have different diameters. The output shaft and the input shaft are plug-connected through the plug-in ports.

4. A high-power microwave transmission line rotary joint according to claim 3, characterized in that: The plug-in port is sleeved with a bushing and an O-type sealing ring.

5. The high-power microwave transmission line rotary joint according to claim 1, characterized in that: The joint copper is connected to the output shaft by a plurality of screws around its circumference to form an integral structure.

6. The high-power microwave transmission line rotary joint according to claim 1, characterized in that: The end of the input shaft connected to the joint beryllium copper is provided with a joint conductive contact finger along its axial direction, and the joint beryllium copper is placed on the joint conductive contact finger.

7. A high-power microwave transmission line rotary joint according to claim 6, characterized in that: One end of the joint conductive contact finger is plugged into the input shaft, and a socket is preset at the end of the input shaft to cooperate with the joint conductive contact finger. One end of the joint beryllium copper is arranged close to the socket. When the joint conductive contact finger is connected with the socket, the joint beryllium copper is pressed onto the input shaft, and the other end of the joint beryllium copper is placed on the end of the joint conductive contact finger away from the input shaft and connected to the joint copper ring.

8. The high-power microwave transmission line rotary joint according to claim 7, characterized in that: The beryllium copper of the joint is located at the end of the joint conductive contact finger away from the input shaft and is a hook-shaped structure for guiding the plugging process.

9. The high-power microwave transmission line rotary joint according to claim 1, characterized in that: The joint beryllium copper is a spring-shaped beryllium copper with a groove structure.

10. A high-power microwave transmission line rotary joint according to claim 9, characterized in that: The joint beryllium copper is a conical beryllium copper, which is used for guiding during the plug-in process.

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