CN211376895U

CN211376895U - Ku waveband double-path coaxial rotary joint

Info

Publication number: CN211376895U
Application number: CN201922437112.4U
Authority: CN
Inventors: 江红; 马丁; 王佳; 聂阳
Original assignee: Zero Eight One Electronic Group Sichuan Liyuan Electronic Co ltd
Current assignee: Zero Eight One Electronic Group Sichuan Liyuan Electronic Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-28
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a Ku waveband double-circuit coaxial rotary joint, including the fixed part and the rotating part that rotate each other and connect, install in the cavity of fixed part and rotating part with fixed part, the coaxial cylindricality waveguide of rotating part, cylindricality waveguide right-hand member rotates with fixed part and is connected with the first fixed contact pin of locating the outside end middle part of fixed part, cylindricality waveguide left end and rotating part fixed connection and be connected with first rotatory contact pin after passing the rotating part, cylindricality waveguide forms the coaxial transmission channel of signal with first fixed contact pin, first rotatory contact pin; the outer side end of the fixed part is eccentrically provided with a second fixed contact pin, the outer side end of the rotating part is eccentrically provided with a second rotating contact pin, and the second rotating contact pin and the second fixed contact pin are communicated with a cavity of the rotating part through the fixed part to form a mode conversion channel. The rotary joint structure becomes compact through a double-path structure formed by the two channels, the rotation is flexible, the standing-wave ratio and the insertion loss are small, and the signal transmission efficiency is high.

Description

Ku waveband double-path coaxial rotary joint

Technical Field

The utility model relates to a communication technology field's coaxial rotary joint technique, concretely relates to Ku wave band double-circuit coaxial rotary joint.

Background

In all mechanically scanned radar systems, the rotary joint is an indispensable key component, and has the function of continuously outputting electromagnetic wave signals with basically stable amplitude and phase when the radar antenna is in azimuth and pitching rotation search so as to ensure the normal operation of the radar.

At present, with the development of modern radar scanning technology, high frequency and broadband are two important development directions of mechanical scanning radar, and simultaneously, higher requirements of broadband, multipath and the like are also put forward on rotary joints. However, the design forms of circular waveguide transition, probe type coupling and common coaxial line can only be used for single-way joint design, and the design structure has larger volume. Therefore, the development of the Ku waveband two-way coaxial rotary joint with a compact structure has wide application value.

SUMMERY OF THE UTILITY MODEL

The not enough to prior art, the utility model aims at providing a Ku wave band double-circuit coaxial rotary joint has characteristics such as compact structure, standing-wave ratio (VSWR) are little, insertion loss is little.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of Ku waveband double-circuit coaxial rotary joint, including fixed part and the rotating part of mutual rotation connection, install the cylindricality waveguide coaxial with fixed part, rotating part in the cavity of fixed part and rotating part, cylindricality waveguide right-hand member with fixed part rotation connection and with locate the first fixed contact pin in the middle part of the fixed part outside end, cylindricality waveguide left end with rotating part fixed connection and pass and be connected with first rotatory contact pin behind the rotating part, cylindricality waveguide with first fixed contact pin, first rotatory contact pin form the coaxial transmission channel of signal for transmit the electromagnetic wave signal; the fixed part outside end off-centre is equipped with the fixed contact pin of second, the rotating part outside end off-centre is equipped with the rotatory contact pin of second, the rotatory contact pin of second with the fixed contact pin of second passes through the cavity intercommunication formation mode conversion passageway of fixed part and rotating part for coupling signal carries out mode conversion.

Furthermore, the fixed part comprises a fixed seat, a fixed end cover, a fixed waveguide and a cover plate which are sequentially connected, the rotating part comprises a rotating waveguide and a rotating end cover which are sequentially connected, and the right end of the rotating waveguide extends into the inside of the left end of the fixed waveguide and is then rotationally connected with the fixed waveguide; l-shaped channels are respectively arranged in the fixed waveguide and the rotating waveguide, and the two L-shaped channels are communicated to form cavities of the fixed part and the rotating part.

Furthermore, the right end of the cylindrical waveguide is located between the fixed seat and the fixed end cover and is rotatably connected with the fixed seat through a first bearing.

Furthermore, choke grooves are reserved between the right end face of the cylindrical waveguide and the fixed seat and between the right end face of the rotary waveguide and the left end of the inner cavity of the fixed waveguide.

Furthermore, the outer wall of the right end of the rotary waveguide is rotatably connected with the inner wall of the left end of the fixed waveguide through a second bearing.

Furthermore, the number of the second bearings is two, the side face of one second bearing is abutted to the inside of the left end of the fixed waveguide, and the side face of the other second bearing is abutted to the cover plate.

Further, an adjusting ring is arranged between the two second bearings.

Further, the first bearing and the second bearing are both deep groove ball bearings.

Compared with the prior art, the utility model provides a Ku wave band double-circuit coaxial rotary joint has following beneficial effect:

1. through a double-path structure formed by two channels of signal coaxial transmission and mode conversion, the volume of the rotary joint is reduced, the structure is compact, the rotation is flexible, the standing-wave ratio is small (namely VSWR is less than or equal to 1.4), the insertion loss is small (below 0.5 dB), and the signal transmission bandwidth and the transmission efficiency are improved;

2. by the choke groove, good transmission performance among the cylindrical waveguide, the rotary waveguide and the fixed waveguide is ensured, and stable rotation of the connection part is realized;

3. the axial movement of the second bearing can be limited by the adjusting ring arranged between the two second bearings, and the size of the choke groove between the rotary waveguide and the fixed waveguide can also be adjusted.

Drawings

Fig. 1 is a schematic view of the main structure of the present invention.

The reference numerals are explained below:

1: cylindrical waveguide 2: first fixed contact pin

3: first rotary pin 4: second fixed contact pin

5: second rotary pin 6: fixed seat

7: fixing the end cover 8: fixed waveguide

9: the cover plate 10: rotary waveguide

11: rotating the end cap 12: l-shaped channel

13: first bearing 14: choke groove

15: second bearing 16: adjusting ring

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1, the utility model provides a Ku waveband double-circuit coaxial rotary joint, including fixed part and the rotating part of mutual rotation connection, install in fixed part and the rotating part's the cavity with fixed part, the coaxial cylindrical waveguide 1 of rotating part, cylindrical waveguide 1 right-hand member rotates with fixed part and is connected with the first fixed contact pin 2 of locating the outside end middle part of fixed part, cylindrical waveguide 1 left end and rotating part fixed connection and pass the rotating part after be connected with first rotatory contact pin 3, cylindrical waveguide 1 and first fixed contact pin 2, first rotatory contact pin 3 form the coaxial transmission channel of signal for transmit electromagnetic wave signal; the outer side end of the fixed part is eccentrically provided with a second fixed contact pin 4, the outer side end of the rotating part is eccentrically provided with a second rotating contact pin 5, and the second rotating contact pin 5 and the second fixed contact pin 4 are communicated with a cavity of the rotating part through the fixed part to form a mode conversion channel for coupling signals to perform mode conversion. Through a double-path structure formed by two channels of signal coaxial transmission and mode conversion, the volume of the rotary joint is reduced, the structure is compact, the rotation is flexible, the standing-wave ratio is small (namely VSWR is less than or equal to 1.4), the insertion loss is small (less than 0.5 dB), and the signal transmission bandwidth and the transmission efficiency are improved.

The fixed part comprises a fixed seat 6, a fixed end cover 7, a fixed waveguide 8 and a cover plate 9 which are connected in sequence, the rotating part comprises a rotating waveguide 10 and a rotating end cover 11 which are connected in sequence, and the right end of the rotating waveguide 10 extends into the left end of the fixed waveguide 8 and is then rotatably connected with the fixed waveguide 8; l-shaped channels 12 are respectively arranged in the fixed waveguide 8 and the rotary waveguide 10, and the two L-shaped channels 12 are communicated to form cavities of the fixed part and the rotary part.

The right end of the cylindrical waveguide 1 is located between the fixed seat 6 and the fixed end cover 7 and is rotatably connected with the fixed seat 6 through a first bearing 13. Choke grooves 14 are reserved between the right end face of the cylindrical waveguide 1 and the fixed seat 6 and between the right end face of the rotary waveguide 10 and the left end of the inner cavity of the fixed waveguide 8 and used for reducing friction when the cylindrical waveguide 1 and the rotary waveguide 10 rotate and influence on electromagnetic wave transmission due to friction heating. Through the choke groove, the good transmission performance among the cylindrical waveguide, the rotary waveguide and the fixed waveguide is ensured, and the stable rotation of the joint is realized.

The outer wall of the right end of the rotary waveguide 10 is rotatably connected with the inner wall of the left end of the fixed waveguide 8 through a second bearing 15. Two second bearings 15 are arranged in parallel, the side surface of one second bearing 15 is abutted against the inside of the left end of the fixed waveguide 8, and the side surface of the other second bearing 15 is abutted against the cover plate 9.

An adjusting ring 16 is arranged between the two second bearings 15, so that the axial movement of the second bearings 15 can be limited, and the size of the choke groove 14 between the rotary waveguide 10 and the fixed waveguide 8 can be adjusted. In the present embodiment, the first bearing 13 and the second bearing 15 are both deep groove ball bearings.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A Ku-waveband two-way coaxial rotary joint is characterized by comprising a fixed part and a rotary part which are mutually rotatably connected, wherein cylindrical waveguides coaxial with the fixed part and the rotary part are installed in cavities of the fixed part and the rotary part, the right ends of the cylindrical waveguides are rotatably connected with the fixed part and are connected with first fixed contact pins arranged in the middle of the outer side ends of the fixed part, the left ends of the cylindrical waveguides are fixedly connected with the rotary part and are connected with first rotary contact pins after penetrating through the rotary part, and the cylindrical waveguides, the first fixed contact pins and the first rotary contact pins form a signal coaxial transmission channel for transmitting electromagnetic wave signals; the fixed part outside end off-centre is equipped with the fixed contact pin of second, the rotating part outside end off-centre is equipped with the rotatory contact pin of second, the rotatory contact pin of second with the fixed contact pin of second passes through the cavity intercommunication formation mode conversion passageway of fixed part and rotating part for coupling signal carries out mode conversion.

2. The Ku waveband two-way coaxial rotary joint according to claim 1, wherein the fixed part comprises a fixed seat, a fixed end cover, a fixed waveguide and a cover plate which are sequentially connected, the rotary part comprises a rotary waveguide and a rotary end cover which are sequentially connected, and the right end of the rotary waveguide extends into the left end of the fixed waveguide and is then rotationally connected with the fixed waveguide; l-shaped channels are respectively arranged in the fixed waveguide and the rotating waveguide, and the two L-shaped channels are communicated to form cavities of the fixed part and the rotating part.

3. The Ku waveband two-way coaxial rotary joint according to claim 2, wherein the right end of the cylindrical waveguide is located between the fixed seat and the fixed end cover and is rotatably connected with the fixed seat through a first bearing.

4. The Ku-waveband two-way coaxial rotary joint according to claim 3, wherein choke grooves are reserved between the right end surface of the cylindrical waveguide and the fixed seat and between the right end surface of the rotary waveguide and the left end of the inner cavity of the fixed waveguide.

5. The Ku waveband two-way coaxial rotary joint according to claim 3 or 4, wherein the outer wall of the right end of the rotary waveguide is rotatably connected with the inner wall of the left end of the fixed waveguide through a second bearing.

6. The Ku waveband two-way coaxial rotary joint according to claim 5, wherein the number of the second bearings is two, the side surface of one second bearing is abutted against the inside of the left end of the fixed waveguide, and the side surface of the other second bearing is abutted against the cover plate.

7. The Ku band two-way coaxial rotary joint according to claim 6, wherein an adjustment ring is disposed between the two second bearings.

8. The Ku-waveband two-way coaxial rotary joint according to claim 6 or 7, wherein the first bearing and the second bearing are both deep groove ball bearings.