Micro-floating pressure self-compensation type radio frequency rotary joint

Abstract

The invention belongs to the field of rotary joint design, and discloses a micro-floating pressure self-compensation type radio frequency rotary joint which comprises a stator and a rotor, and the stator is rotationally connected with the rotor. The stator comprises a stator mounting disc, a stator shell and a stator end K-type interface, one end of the stator mounting disc is provided with the stator end K-type interface, the other end of the stator mounting disc is sleeved with the stator shell, the stator end K-type interface is provided with a spherical jack penetrating through the stator mounting disc, and a long shielding ring is arranged in the stator mounting disc and located outside the spherical jack. The rotor comprises a rotor shell and a rotor end K-type interface, one end of the rotor shell is inserted into the stator mounting disc, the other end of the rotor shell is provided with the rotor end K-type interface, the rotor end K-type interface is provided with a spherical contact pin inserted into the spherical jack, a short shielding ring is arranged in the rotor shell and located outside the spherical contact pin, and the long shielding ring is inserted into the short shielding ring. Abrasion of products under the condition of long-term rotation can be compensated, the requirement for high rotating speed is met, and the service life of the products is greatly prolonged.

Description

Technical Field

[0001] The invention belongs to the field of rotary joint design and relates to a micro-floating pressure self-compensating radio frequency rotary joint. Background Art

[0002] In the field of wireless communication technology, RF rotary joints are very important communication devices, which are widely used in various radar equipment for air control of aircraft, airspace defense, mobile communications, satellite signal transmission, etc. The difference between rotary joints and conventional adapters is that they can rotate around the axis perpendicular to the direction of wave propagation. This type of rotary joint can freely rotate 360 ​​degrees while maintaining transmission characteristics.

[0003] At present, in actual use, the existing radio frequency rotary joints suffer a certain degree of wear due to the long-term rotation of the rotor and the stator, which in turn affects the stability and reliability of the radio frequency rotary joints. Summary of the invention

[0004] In order to solve the technical problem that the stability and reliability of a radio frequency rotary joint are affected by wear caused by long-term rotation of a rotor and a stator during use, the present invention discloses a micro-floating pressure self-compensating radio frequency rotary joint, the radio frequency rotary joint comprises a stator and a rotor, and the stator is rotatably connected to the rotor. The stator comprises a stator mounting plate, a stator housing and a stator end K-type interface, one end of the stator mounting plate is provided with the stator end K-type interface, the other end is sleeved with the stator housing, the stator end K-type interface is provided with a spherical socket passing through the stator mounting plate, and a long shielding ring is provided inside the stator mounting plate and outside the spherical socket.

[0005] Wherein, the rotor includes a rotor shell and a rotor end K-type interface, one end of the rotor shell is inserted into the stator mounting plate, and the other end is provided with the rotor end K-type interface, and the rotor end K-type interface is provided with a spherical pin that passes through the rotor shell and is inserted into the spherical socket, and a short shielding ring is provided in the rotor shell and outside the spherical pin, and the long shielding ring is inserted into the short shielding ring.

[0006] A bearing is arranged in the annular space surrounded by the stator mounting plate, the stator housing and the rotor housing.

[0007] Further, the stator end K-type interface comprises a stator inner shell and a stator interface, the stator interface is inserted into the central mounting hole of the stator mounting plate, the stator inner shell is arranged in the stator interface, and the spherical socket passing through the stator interface and the stator mounting plate is arranged in the stator interface;

[0008] The K-type interface at the rotor end includes a rotor inner shell and a rotor interface. The rotor interface is inserted into the central mounting hole of the rotor outer shell. The spherical pin passing through the rotor interface and the rotor outer shell is provided in the socket of the rotor interface.

[0009] Furthermore, the rotor end K-type interface also includes a spring, one end of which is fixed in the socket, and the other end of which is sleeved on the spherical pin.

[0010] Furthermore, the rotor-end K-type interface includes a first insulator sleeved on the spherical socket, and the stator-end K-type interface includes a second insulator sleeved on the spherical pin.

[0011] Furthermore, the long shielding ring comprises a fixed end and an open-petal structure, and the open-petal structure is inserted into the short shielding ring.

[0012] Furthermore, the open-petal structure includes a plurality of long cantilever spring leaves uniformly arranged circumferentially at the end of the fixed end.

[0013] Furthermore, the spherical pin is made of silver graphite material, and the inner wall of the spherical socket is provided with a gold-plated layer.

[0014] Compared with the prior art, the beneficial effects achieved by at least one of the above technical solutions adopted in the embodiments of this specification include at least: the micro-floating pressure self-compensating RF rotary joint of the present invention can provide a soft torque under rotation conditions by setting short shielding rings and long shielding rings that cooperate with each other on the rotor and stator. At the same time, a spring is also set in the K-type interface at the rotor end, which can compensate for the wear of the product under long-term rotation conditions. At the same time, the spring can also achieve high speed requirements, greatly improving the life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of a micro-floating pressure self-compensating radio frequency rotary joint disclosed in an embodiment of the present invention;

[0017] Figure 2 A schematic diagram 102 of a long shielding ring and a short shielding ring disclosed in an embodiment of the present invention;

[0018] Among them, 3, spherical socket; 4, stator mounting plate; 6, bearing; 7, stator housing; 8, rotor housing; 10, socket; 11, long shielding ring; 111, fixed end; 112, long cantilever spring; 12, spherical pin; 13, short shielding ring; 14, spring; 101, stator inner housing; 102, stator interface; 103, first insulator; 201, rotor inner housing; 202, rotor interface; 203, second insulator. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0020] The following describes the implementation methods of the present application through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and the features of the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0021] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0022] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0023] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0024] The embodiment of the present invention discloses a micro-floating pressure self-compensating radio frequency rotary joint, the radio frequency rotary joint comprising a stator and a rotor, the stator being rotatably connected to the rotor. Figure 1 As shown, the stator includes a stator mounting plate 4, a stator housing 7 and a stator end K-type interface. One end of the stator mounting plate 4 is provided with the stator end K-type interface, and the other end is sleeved with the stator housing 7. The stator end K-type interface is provided with a spherical socket 3 passing through the stator mounting plate 4. A long shielding ring 11 is provided inside the stator mounting plate 4 and outside the spherical socket 3.

[0025] The rotor comprises a rotor housing 8 and a rotor end K-type interface, one end of the rotor housing 8 is inserted into the stator mounting plate 4, and the other end is provided with the rotor end K-type interface, the rotor end K-type interface is provided with a spherical pin 12 which passes through the rotor housing 8 and is inserted into the spherical socket 3, a short shielding ring 13 is provided inside the rotor housing 8 and outside the spherical pin 12, and the long shielding ring 11 is inserted into the short shielding ring 13.

[0026] A bearing 6 is provided in the annular space surrounded by the stator mounting plate 4, the stator housing 7 and the rotor housing 8. Specifically, the bearing 6 can be a parallel deep groove ball bearing. The rotor is sleeved on the inner diameter of the parallel deep groove ball bearing, and the stator is sleeved on the outer diameter of the parallel deep groove ball bearing to achieve relative rotation between the rotor and the stator.

[0027] In specific implementation, the stator mounting plate 4, the stator housing 7 and the stator end K-type interface can be fixed by means of threads. The rotor housing 8 and the rotor end K-type interface can also be fixed by means of threads.

[0028] Further, see Figure 1As shown, the stator-end K-type interface comprises a stator inner housing 101 and a stator interface 102, the stator interface 102 is inserted into the central mounting hole of the stator mounting plate 4, the stator inner housing 101 is arranged in the stator interface 102, and the stator interface 102 is provided with the spherical socket 3 passing through the stator interface 102 and the stator mounting plate 4. The rotor-end K-type interface comprises a rotor inner housing 201 and a rotor interface 202, the rotor interface 202 is inserted into the central mounting hole of the rotor outer shell 8, and the spherical pin 12 passing through the rotor interface 202 and the rotor outer shell 8 is arranged in the socket 10 of the rotor interface 202.

[0029] In a specific implementation, the stator inner casing 101 and the stator interface 102 as well as the rotor inner casing 201 and the rotor interface 202 are respectively assembled and positioned by partial interference fit.

[0030] See also Figure 1 As shown, further, the rotor end K-type interface further includes a spring 14, one end of which is fixed in the socket 10, and the other end is sleeved on the spherical pin 12 for interference fit. Under the initial condition, the spring 14 is in a compressed state. With the wear of long-term rotation, the spring 14 can perform floating compensation. This structure can not only meet the high speed requirements, but also meet the high life requirements.

[0031] Furthermore, the rotor-end K-type interface includes a first insulator 103 sleeved on the spherical socket 3, and the stator-end K-type interface includes a second insulator 203 sleeved on the spherical pin 12. Specifically, after the stator inner housing 101 and the stator interface 102 and the rotor inner housing 201 and the rotor interface 202 are assembled in place, an annular groove is formed between the two, and the annular groove is located at the outer periphery of the spherical socket 3 / spherical pin 12. The first insulator 103 / the second insulator 203 is arranged on the annular groove to be insulated from the outside. At the same time, the first insulator 103 and the spherical socket 3, as well as the spherical pin 12 and the second insulator 203 are both interference fit to avoid relative rotation.

[0032] Further, see Figure 2 As shown, the long shielding ring 11 includes a fixed end 111 and an open-petal structure, and the open-petal structure is inserted into the short shielding ring 13, wherein the short shielding ring 13 can be fixed in the rotor housing 8 by a gap positioning method, and the long shielding ring 11 is fixed in the stator mounting plate 4 by a gap positioning method.

[0033] Furthermore, the open-petal structure includes a plurality of long cantilever springs 112 evenly arranged circumferentially at the end of the fixed end. In this specific embodiment, 8 long cantilever springs are preferably evenly arranged circumferentially at the end of the fixed end. The long shielding ring 11 is set as an open-petal structure and is expanded and shaped at the same time, the purpose of which is to ensure the contact between the long and short shielding rings and the soft torque under rotation conditions.

[0034] Furthermore, the spherical pin 12 is made of silver graphite AgC4 material, and the inner wall of the spherical socket 3 is provided with a gold-plated layer.

[0035] The micro-floating pressure self-compensating radio frequency rotary joint of the present invention can provide a soft torque under rotation conditions by setting a short shielding ring and a long shielding ring that cooperate with each other on the rotor and the stator. At the same time, a spring is also set in the K-type interface at the rotor end, which can compensate for the wear of the product under long-term rotation conditions. At the same time, the spring can also achieve high speed requirements, greatly improving the life of the product.

[0036] Obviously, those skilled in the art should understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A micro-floating pressure self-compensating radio frequency rotary joint, comprising a stator and a rotor, wherein the stator is rotatably connected to the rotor, characterized in that: The stator comprises a stator mounting plate (4), a stator housing (7) and a stator end K-type interface, one end of the stator mounting plate (4) is provided with the stator end K-type interface, and the other end is sleeved with the stator housing (7), the stator end K-type interface is provided with a spherical socket (3) passing through the stator mounting plate (4), and a long shielding ring (11) is provided inside the stator mounting plate (4) and outside the spherical socket (3); The rotor comprises a rotor housing (8) and a rotor end K-type interface, one end of the rotor housing (8) is inserted into the stator mounting plate (4), and the other end is provided with the rotor end K-type interface, the rotor end K-type interface is provided with a spherical pin (12) that passes through the rotor housing (8) and is inserted into the spherical socket (3), a short shielding ring (13) is provided inside the rotor housing (8) and outside the spherical pin (12), and the long shielding ring (11) is inserted into the short shielding ring (13); A bearing (6) is provided in an annular space surrounded by the stator mounting plate (4), the stator housing (7) and the rotor housing (8).

2. The micro-floating pressure self-compensating radio frequency rotary joint according to claim 1 is characterized in that: The stator end K-type interface comprises a stator inner shell (101) and a stator interface (102), wherein the stator interface (102) is inserted into a central mounting hole of the stator mounting plate (4), the stator inner shell (101) is arranged in the stator interface (102), and the stator interface (102) is provided with the spherical socket (3) passing through the stator interface (102) and the stator mounting plate (4); The rotor end K-type interface comprises a rotor inner shell (201) and a rotor interface (202), wherein the rotor interface (202) is inserted into a central mounting hole of the rotor outer shell (8), and the spherical pin (12) passing through the rotor interface (202) and the rotor outer shell (8) is arranged in the insertion hole (10) of the rotor interface (202).

3. The micro-floating pressure self-compensating radio frequency rotary joint according to claim 2 is characterized in that: The rotor end K-type interface also includes a spring (14), one end of which is fixed in the plug hole (10) and the other end of which is sleeved on the spherical plug pin (12).

4. The micro-floating pressure self-compensating radio frequency rotary joint according to claim 2, characterized in that: The rotor-end K-type interface comprises a first insulator (103) sleeved on the spherical socket (3), and the stator-end K-type interface comprises a second insulator (203) sleeved on the spherical pin (12).

5. The micro-floating pressure self-compensating radio frequency rotary joint according to claim 1, characterized in that: The long shielding ring (11) comprises a fixed end and an open-petal structure, and the open-petal structure is inserted into the short shielding ring (13).

6. The micro-floating pressure self-compensating radio frequency rotary joint according to claim 5, characterized in that: The open-petal structure includes a plurality of long cantilever spring leaves uniformly arranged circumferentially at the end of the fixed end.

7. The micro-floating pressure self-compensating radio frequency rotary joint according to claim 1, characterized in that: The spherical pin (12) is made of silver graphite material, and the inner wall of the spherical socket (3) is provided with a gold-plated layer.

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