CN113285189A

CN113285189A - Totally enclosed wave filter and communication equipment for aerospace

Info

Publication number: CN113285189A
Application number: CN202110425347.0A
Authority: CN
Inventors: 李远智; 张火林
Original assignee: Wuhan Devices Electronic Technology Co ltd
Current assignee: Wuhan Devices Electronic Technology Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-08-20

Abstract

The invention relates to a fully-sealed filter, which comprises a filter body and a sealed shell, wherein the sealed shell is limited with a sealed shell cavity with stable sealed gas volume, the filter body is contained in the shell cavity, and a connector connected with the filter body is arranged on the sealed shell in a penetrating way. The invention also relates to aerospace communication equipment adopting the fully-sealed filter. According to the fully-sealed filter provided by the invention, the filter body is sealed in the sealed shell, and is isolated from the external environment, so that the filter body is ensured to work in a proper air pressure environment all the time, the filter body is prevented from being influenced by the change of the air pressure and the like of the external environment to influence the working performance such as the electrical performance and the like, and the working reliability of the filter is ensured; when the communication device is applied to aerospace equipment such as airplanes and satellites and used as a component of airborne and satellite-borne communication equipment, the stable and reliable work of the communication equipment can be ensured.

Description

Totally enclosed wave filter and communication equipment for aerospace

Technical Field

The invention belongs to the technical field of aerospace communication, and particularly relates to a fully-sealed filter and aerospace communication equipment using the same.

Background

Communication equipment needs to be mounted in aerospace equipment such as airplanes and satellites, and a filter is an important component of the communication equipment. The airborne and spaceborne communication equipment has a special working environment and is almost in a vacuum state, in the conventional design, the filter has no sealing concept, no air pressure difference exists between a functional area in the cavity of the filter and the external environment, and the air pressure in the filter is directly changed due to the severe change of the environmental air pressure in the process of lifting the aerospace equipment, so that the electrical property of the filter is seriously deteriorated.

Disclosure of Invention

The invention relates to a fully-sealed filter and aerospace communication equipment adopting the same, which can at least solve part of defects in the prior art.

The invention relates to a fully-sealed filter, which comprises a filter body and a sealed shell, wherein the sealed shell is limited with a sealed shell cavity with stable sealed gas volume, the filter body is contained in the shell cavity, and a connector assembly connected with the filter body is arranged on the sealed shell in a penetrating way.

In one embodiment, the gas environment defined within the housing chamber is an atmospheric pressure environment.

As one embodiment, the connector includes an annular housing and an insertion core, the annular housing is mounted on the sealed housing, the insertion core is inserted into the annular housing and a sealing material is filled between the annular housing and the insertion core, one end of the insertion core is connected to the filter body, and the other end of the insertion core extends out of the sealed housing and is reserved with an insertion portion.

In one embodiment, the sealing plug is made of glass and seals the annular space between the annular housing and the plug core in a sinter-filled manner.

In one embodiment, the annular housing is a metal housing.

In one embodiment, the annular housing and the hermetic case are sealed by reflow soldering.

As one embodiment, the sealed casing includes a casing body and a sealing cover plate, wherein one end of the casing body is open, and the sealing cover plate covers the open end of the casing body and is welded to the casing body.

As one embodiment, the filter body includes a resonance rod, an adjustment plate, and a tuning screw installed on the adjustment plate; a mounting base is arranged in the closed shell, and the resonance rod is mounted on the mounting base; the two opposite inner walls of the closed shell are respectively provided with a step, and two ends of the adjusting plate are respectively installed on the step surfaces on two sides through adjusting screws.

The invention also relates to an aerospace communication device comprising a hermetically sealed filter as described above.

The invention has at least the following beneficial effects:

according to the fully-sealed filter provided by the invention, the filter body is sealed in the sealed shell, the filter body is isolated from the external environment, the filter body is ensured to work in a proper air pressure environment all the time, the filter body is prevented from being influenced by the change of the air pressure and the like of the external environment to influence the working performance of the filter body such as the electrical performance and the like, and the working reliability of the filter is ensured. When the communication device is applied to aerospace equipment such as airplanes and satellites and used as a component of airborne and satellite-borne communication equipment, the stable and reliable work of the communication equipment can be ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structural diagram of a hermetically sealed filter according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a hermetically sealed filter according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a filter for facilitating coupling according to a second embodiment of the present invention;

FIG. 4 is a schematic view of the connection structure between the resonant rod and the coupling plate in FIG. 3;

fig. 5 is a schematic structural view of the coupling plate in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1 and 2, a hermetically sealed filter according to an embodiment of the present invention includes a filter body 2 and a hermetically sealed housing 1, where the hermetically sealed housing 1 defines a sealed housing cavity with a stable volume of a sealed gas, the filter body 2 is housed in the housing cavity, and a connector 3 connected to the filter body 2 is inserted through the hermetically sealed housing 1.

The filter body 2 has no difference from the conventional structure, and is not described herein. The above-mentioned closed casing 1 is a reliable fully-closed structure, so that the stability of the gas volume in the casing cavity can be ensured, and it is generally considered that the gas volume in the casing cavity can be ensured to be constant, and the closed casing 1 will not leak gas.

It can be understood that, a certain volume of gas is sealed in the housing cavity, and the sealed housing 1 isolates the housing cavity environment from the external environment, so as to ensure that the filter body 2 is always in a stable gas environment, which is obviously better than the optimal pressure environment for satisfying the normal and stable operation of the filter body 2.

Optionally, the filter body 2 is installed in the sealed housing 1 and operated under the atmospheric pressure environment, after the sealed housing 1 is completely sealed, the sealed gas in the sealed housing 1 is air, and the gas environment defined in the housing cavity is the atmospheric pressure environment, so that the normal and stable operation of the filter body 2 can be ensured. The atmospheric pressure environment can be a standard atmospheric pressure environment or a nonstandard atmospheric pressure environment, and the normal stable work of the filter body 2 can be met.

In order to facilitate the installation of the filter body 2 in the sealed housing 1, the sealed housing 1 is preferably provided as a split structure, and specifically, as shown in fig. 1 and 2, the sealed housing 1 includes a housing body 11 and a sealing cover plate 12, one end of the housing body 11 is open, and the sealing cover plate 12 covers the open end of the housing body 11 and is welded to the open end. After the filter body 2 is installed in the sealed housing 1, the sealing cover plate 12 covers the housing body 11 and the sealing cover plate 12 is welded to the housing body 11, so that the sealing performance of the sealed housing 1 can be ensured. The welding between the sealing cover plate 12 and the shell body 11 can adopt conventional welding methods such as laser welding, and the details are not described here. Then, the sealing cover plate 12 and the case body 11 are preferably made of metal members suitable for a welding process.

The connector 3 is used to electrically connect the filter body 2 to an external device, and therefore, it needs to penetrate through the sealed housing 1 to be connected to the external device. Based on the requirement of the hermetic shell 1 for complete sealing, the penetrating position of the connector 3 on the hermetic shell 1 needs to be sealed, and it is required to ensure that the connector 3 itself does not have an air leakage channel. Preferably, as shown in fig. 1, the connector 3 includes an annular housing 31 and an insertion core 32, the annular housing 31 is mounted on the sealed housing 1, the insertion core 32 is inserted into the annular housing 31 and a sealing material 33 is filled between the annular housing and the insertion core 31, one end of the insertion core 32 is connected to the filter body 2, and the other end of the insertion core 32 extends out of the sealed housing 1 and is reserved with an insertion portion. In one embodiment, a through hole is provided in the hermetic casing 1, and the annular housing 31 is fitted into the through hole; in other embodiments, the annular housing 31 may be formed integrally with the hermetic shell 1. In the embodiment, preferably, the annular housing 31 and the hermetic shell 1 are sealed by reflow soldering, for example, gold-tin paste is used to solder the annular housing 31 and the hermetic shell 1 by reflow soldering.

The annular shell 31 can be cylindrical and the like, and a corresponding hole is formed in the closed shell 1; the plug core 32 is preferably arranged coaxially with the annular housing 31.

The sealing plugging material 33 needs to plug the annular space between the annular shell 31 and the plug core 32, and the sealing plugging material 33 can be made of polymer materials such as polytetrafluoroethylene, but when the sealing plugging material 33 is adopted, air leakage passages such as gaps can still occur, and the full sealing performance of the sealed shell 1 cannot be completely ensured; as a preferred structure of this embodiment, the sealing plug 33 is made of glass, and the annular space between the annular housing 31 and the plug core 32 is sealed by sintering and filling, which not only can ensure sealing performance and ensure that no air leakage channel occurs in the connector 3, but also has better weather resistance by using glass as the sealing plug.

In one embodiment, the filter body 2 comprises a resonance rod 21, an adjusting plate 23 and a tuning screw 22 mounted on the adjusting plate 23, and based on the above-mentioned scheme of accommodating the filter body 2 by the sealed housing 1, it is preferable to provide a mounting base in the sealed housing 1, and mount the resonance rod 21 of the filter body 2 on the mounting base, for example, fix the resonance rod 21 on the mounting base by screws or the like; the inner walls of two opposite surfaces of the closed shell 1 are respectively provided with steps, two ends of the adjusting plate 23 are respectively installed on the step surfaces of the two sides through adjusting screws, and the distance between the adjusting plate 23 and the step surfaces can be adjusted by screwing the adjusting screws, so that the purpose of debugging and adjusting the filter body 2 is achieved, and the filter is simple in structure and convenient to operate.

The embodiment of the invention also provides aerospace communication equipment, which comprises the fully-sealed filter, wherein the connection structure between the filter and other components of the communication equipment is conventional in the field, and details are not repeated herein.

The totally enclosed filter that this embodiment provided seals up filter body 2 and keeps in airtight casing 1, keeps apart filter body 2 and external environment, ensures that filter body 2 works under suitable atmospheric pressure environment all the time, avoids filter body 2 to receive the change such as external environment atmospheric pressure and influence working property such as its electrical property, guarantees the operational reliability of filter. When the communication device is applied to aerospace equipment such as airplanes and satellites and used as a component of airborne and satellite-borne communication equipment, the stable and reliable work of the communication equipment can be ensured.

Example two

The embodiment of the invention provides a filter convenient for coupling, which can be used as the structural optimization of the fully-sealed filter provided by the first embodiment.

As shown in fig. 3-5, the filter for facilitating coupling includes a filter housing 1, a coupling plate 4 and a plurality of resonant rods 2, wherein a plurality of resonant cavities are formed in the filter housing 1, a mounting boss 13 is provided in each resonant cavity, each resonant rod 2 is disposed in each resonant cavity in a one-to-one correspondence manner and connected to the corresponding mounting boss 13, the resonant cavities are coupled to each other through a predetermined coupling window to form a filter coupling channel, the coupling plate 4 extends continuously along the filter coupling channel and is fixedly connected to each resonant rod 2, and the coupling plate 4 between each two adjacent resonant cavities is deformed in a concave-convex manner to match a design waveform of the filter.

The filter case 1 may be configured as the sealed case 1 in the first embodiment.

The filter housing 1 generally adopts a split structure, and includes a housing body and a cover plate, wherein one end of the housing body is open, and the cover plate is suitable for covering the open end of the housing body to accommodate each device in a housing cavity.

The resonant rod 2 is a conventional device in the field, the specific structure is not described herein, and the connection and operation between the resonant rod and the mounting boss 13 are conventional in the field. In one embodiment, as shown in fig. 3, the mounting boss 13 has a threaded mounting hole, and the resonant rod 2 is screwed into the threaded mounting hole, so that the resonant rod 2 is fixedly connected with the mounting boss 13, and the tuning operation can be performed.

The formation of a plurality of resonant cavities in the filter housing 1 and the mutual coupling of the resonant cavities through the predetermined coupling windows to form the filter coupling channels are conventional structures in the art, for example, a ridge is disposed in the housing to divide the housing into a plurality of resonant cavities, and the predetermined coupling windows can be formed by enclosing the ridges or opening the ridges. In the filter coupling channel, the head and tail resonant cavities are respectively connected with the input end and the output end of the filter.

The coupling piece 4 should have a suitable structural strength and a certain plastic deformation capability, and particularly preferably a certain plastic deformation capability under the action of a hand, in one embodiment, the coupling piece 4 is a flexible metal plate suitable for manual buckling and pressing deformation, including but not limited to a copper plate.

After the coupling pieces 4 are fixedly connected with the resonant rods 2 and after the resonant rods 2 are mounted on the mounting bosses 13, the effect of changing the coupling amount between the two resonant cavities can be achieved by adjusting the deformation amount of the coupling pieces 4 between the two adjacent resonant cavities according to the wave form design requirement of the filter, so that the wave form debugging effect of the filter is achieved, the operation is convenient and reliable, and the wave form debugging efficiency of the filter can be obviously improved. Correspondingly, a plurality of debugging windows for adjusting the deformation of the coupling sheet 4 are arranged on the filter shell 1, one debugging window is arranged between every two adjacent resonant cavities, and the coupling sheet 4 at the corresponding position can be operated through the debugging windows so as to achieve the purpose of waveform debugging; wherein, coupling piece 4 deformation operation accessible corresponding instrument realizes, and this instrument can collude pressure fine setting to coupling piece 4, adopts L type member etc. for example.

In one embodiment, as shown in fig. 3-5, in the initial form of the coupling plate 4, there is a protruding portion 41 between every two adjacent resonant rods 2, the height of the protruding portion 41 is determined according to the position of the protruding portion in the filter coupling channel and the design waveform of the filter, and in the embodiment shown in fig. 5, the protruding heights of the head and tail protruding portions 41 are greater than the protruding heights of the remaining protruding portions 41, and the initial heights of the remaining protruding portions 41 are the same; after the coupling piece 4 is fixedly connected with each resonance rod 2 and each resonance rod 2 is installed on each installation boss 13, the protruding height of each protruding part 41 is finely adjusted, so that the purpose of debugging the wave form of the filter can be achieved, the debugging sensitivity is high, the debugging efficiency can be effectively improved, and the debugging effect can be ensured.

Based on the design, the coupling condition between two adjacent resonant cavities is greatly improved, the low-frequency ultra-bandwidth design can be realized, and the problem that the low-frequency ultra-bandwidth cannot be realized in the traditional design can be effectively solved.

The coupling piece 4 and the resonance rod 2 are preferably connected by welding. In one embodiment, as shown in fig. 5, a plurality of welding holes 42 are formed on the coupling plate 4, and the rod portions of the resonant rods 2 are correspondingly inserted into the welding holes 42. Further preferably, as shown in fig. 3 and 4, the rod portion of the resonant rod 2 is in a stepped shaft shape, wherein the small diameter end of the rod portion is connected with the corresponding mounting boss 13, and the coupling piece 4 is welded with the stepped surface of the rod portion, so that the structure can facilitate the deformation debugging operation of the coupling piece 4, and avoid the influence on the connection between the coupling piece 4 and the resonant rod 2 caused by the buckling deformation operation of the coupling piece 4.

The embodiment of the invention also relates to a coupling method of the filter, which comprises the following steps:

completing the relative connection between each resonance rod 2 and the coupling sheet 4 in the initial shape and between each resonance rod 2 and each mounting boss 13;

comparing the formed waveform of the current filter with the designed waveform of the filter, and adjusting the deformation amount of the corresponding position of the coupling sheet 4 according to the waveform difference until the formed waveform of the current filter is matched with the designed waveform of the filter.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A totally enclosed filter, includes the filter body, its characterized in that: the filter comprises a filter body and is characterized by further comprising a closed shell, wherein a closed shell cavity with stable sealed gas volume is limited in the closed shell, the filter body is contained in the shell cavity, and a connector connected with the filter body is arranged on the closed shell in a penetrating mode.

2. The hermetically sealed filter of claim 1, wherein: the gas environment defined in the shell cavity is an atmospheric pressure environment.

3. The hermetically sealed filter of claim 1, wherein: the connector comprises an annular shell and an inserting core, the annular shell is arranged on the closed shell, the inserting core penetrates through the annular shell, a sealing plugging material is filled between the annular shell and the inserting core, one end of the inserting core is connected with the filter body, and the other end of the inserting core extends out of the closed shell and is reserved with an inserting part.

4. The hermetically sealed filter of claim 3, wherein: the sealing and plugging material is glass, and an annular space between the annular shell and the plug core is plugged in a sintering and filling mode.

5. The hermetically sealed filter of claim 3, wherein: the annular shell is a metal shell.

6. The hermetically sealed filter of claim 5, wherein: and sealing the annular shell and the closed shell in a reflow soldering mode.

7. The hermetically sealed filter of claim 1, wherein: the closed shell comprises a shell body and a sealing cover plate, wherein one end of the shell body is open, and the sealing cover plate covers the open end of the shell body and is welded with the shell body.

8. The hermetically sealed filter of claim 1, wherein: the filter body comprises a resonance rod, an adjusting plate and a tuning screw rod arranged on the adjusting plate; a mounting base is arranged in the closed shell, and the resonance rod is mounted on the mounting base; the two opposite inner walls of the closed shell are respectively provided with a step, and two ends of the adjusting plate are respectively installed on the step surfaces on two sides through adjusting screws.

9. An aerospace communication device, comprising: comprising a hermetically sealed filter according to any of claims 1 to 8.