Filter capable of adapting to low-pressure environment
By using cover plate and sealing ring design in the filter, combined with welding and ultraviolet curing glue, the air pressure in the cavity is stabilized, solving the problem of air breakdown and heat transfer efficiency at high altitude and low air pressure, and improving Filter applicability and stability.
Patent Information
- Application Number
- CN202420727794.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-09
AI Technical Summary
In high-altitude and low air pressure environments, the filter is prone to air breakdown and heat transfer efficiency, resulting in a decrease in power capacity and poor heat dissipation capabilities, which affects the applicability and stability of the equipment.
A filter that adapts to low air pressure environment was designed. By setting a cover plate and sealing ring in the filter box, the cavity is completely isolated from the external air by welding and ultraviolet curing glue, ensuring stable air pressure and combining with metal The heat dissipation of the material cools down.
It effectively avoids low-voltage breakdown, improves the applicability and stability of the filter, and ensures normal operation in high altitude environment.
Smart Images
Figure CN222320473U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of filters, and in particular relates to a filter capable of adapting to a low pressure environment. Background Art
[0002] With the widespread application of electronic products on aircraft platforms, the applicable environment of electronic equipment has become increasingly complex and diverse. Among them, high-altitude and low-pressure conditions have a significant impact on the applicability and reliability of high-power equipment.
[0003] The impact of high-altitude environment on high-power filters is mainly that air breakdown and reduced heat transfer efficiency will occur under low pressure, resulting in a sharp decrease in power capacity. The basic mechanism is that when the filter is in a high-altitude environment, the air pressure in the cavity is low, the smaller the gas density, the free electrons in the cavity move under the action of the electric field, the greater the average free path of the collision between electrons and gas molecules, and the greater the kinetic energy obtained by the electrons accelerated by the voltage before the collision, which makes it easier to excite gas molecules and then easier to produce discharge; when the electric field strength inside the filter exceeds the breakdown field strength, it will cause the gas to ionize and conduct, forming a short circuit, and a large amount of heat generated will be released inside, causing the air temperature to rise, accelerating gas ionization, and forming a vicious cycle. At the same time, the air at high altitude is thin, the heat dissipation capacity of convection decreases, the temperature rises, and the filter's power passing capacity decreases. Utility Model Content
[0004] The purpose of the utility model is to provide a filter capable of adapting to low pressure environment, so as to solve the problems of the existing coupling in the use process mentioned in the background technology.
[0005] To achieve the above object, the utility model provides the following technical solution: a filter capable of adapting to a low pressure environment, comprising a filter box and a cover plate, wherein a cavity is provided in the filter box, and a plurality of groups of mounting column feet are arranged in the cavity, and a front tap and a flying rod are installed on each group of mounting column feet, an antenna tap is arranged above the flying rod, and a resonant column is sleeved on the outer side of the mounting column feet;
[0006] The cover plate is fixedly arranged in the upper part of the cavity, an SMP connector is arranged on the cover plate just above the antenna tap, a sealing ring is arranged at the connection position between the SMP connector and the cover plate, and a tuning screw is arranged on the upper part of the SMP connector.
[0007] Preferably, an antenna port connector is connected to the bottom of the filter box body, and a sealing ring is also provided at the connection position between the antenna port connector and the filter box body.
[0008] Preferably, the cover plate is adapted to the shape of the cavity, and the connection position between the cover plate and the filter box body is fixed and sealed by welding.
[0009] Preferably, a UV curing adhesive is provided at the connection position between the tuning screw and the cover plate, and the UV curing adhesive fully covers the connection position between the tuning screw and the cover plate.
[0010] Preferably, the filter box body is made of metal.
[0011] The beneficial effects of the utility model are: the internal space of the filter cavity is completely isolated from the external space, the air pressure in the filter is stable, and the air pressure in the cavity will not decrease after the aircraft flies to a high altitude, thereby avoiding low-pressure breakdown, making the filter more applicable and more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the explosion structure of the utility model.
[0013] In the figure: 1. filter box; 2. front tap; 3. flying rod; 4. resonant column; 5. antenna tap; 6. tuning screw; 7. SMP connector; 8. sealing ring; 9. cover plate; 10. insulating medium; 11. antenna port connector. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] Reference Figure 1 A filter capable of adapting to a low pressure environment comprises a filter box body 1 and a cover plate 9, wherein a cavity is provided in the filter box body 1, and a plurality of groups of mounting column feet are arranged in the cavity, a front tap 2 and a flying rod 3 are arranged on each group of mounting column feet, an antenna tap 5 is arranged above the flying rod 3, and a resonance column 4 is sleeved on the outer side of the mounting column feet;
[0016] The cover plate 9 is fixedly arranged in the upper part of the cavity. The cover plate 9 is provided with an SMP connector 7 directly above the antenna tap 5. A sealing ring 8 is provided at the connection position between the SMP connector 7 and the cover plate 9, and a tuning screw 6 is provided on the upper part of the SMP connector 7.
[0017] In view of the problem that existing filters are prone to low-pressure breakdown and reduced heat transfer efficiency in low-pressure environments, which affects the applicability and stability of the equipment, this solution proposes a filter suitable for low-pressure and high-altitude environments. The filter cavity is sealed by fixing it with a cover plate 9. At the same time, a sealing ring 8 is provided at the connection position between the SMP connector 7 and the cover plate 9, so that the internal space of the cavity is completely isolated from the external space. The air pressure in the filter is stable, and the air pressure in the cavity will not decrease after the aircraft flies to high altitudes, thereby avoiding low-pressure breakdown, making the filter more applicable and more stable.
[0018] Furthermore, an antenna port connector 11 is connected to the bottom of the filter box body 1 , and a sealing ring 8 is also provided at the connection position between the antenna port connector 11 and the filter box body 1 .
[0019] Through this technical solution, the connection position between the antenna port connector 11 and the bottom of the filter box body 1, and the connection position between the SMP connector 7 and the cover plate 9 are also sealed with a glass sintering process, and are used in conjunction with the sealing ring 8 to ensure the sealing of the connection between the connector and the cavity, thereby completely isolating the cavity from the outside air.
[0020] Furthermore, the cover plate 9 is adapted to the shape of the cavity, and the connection position between the cover plate 9 and the filter box body 1 is fixed and sealed by welding.
[0021] Through this technical solution, the cover plate 9 is adapted to the shape of the cavity, so that the cover plate 9 can be just inserted into the cavity. The cover plate 9 and the filter box body 1 maintain sealing through welding. At the same time, the cover plate 9 is also tightened by the tuning screw 6 and screws to ensure the tightness of the connection between the cover plate 9 and the filter box body 1.
[0022] Furthermore, a UV curing adhesive is provided at the connection position between the tuning screw 6 and the cover plate 9 , and the UV curing adhesive fully covers the connection position between the tuning screw 6 and the cover plate 9 .
[0023] After the tuning screw 6 is debugged, the connection position between the tuning screw 6 and the cover plate 9 is sealed and fixed by using ultraviolet curing glue to ensure the airtightness of the cavity.
[0024] Furthermore, an insulating medium 10 is provided on the outer side of the antenna tap 5 .
[0025] Furthermore, the filter box body 1 is made of metal.
[0026] Through this technical solution, a metal filter is used, and the excellent heat dissipation property of metal materials is utilized to facilitate heat dissipation, thereby cooling the filter cavity.
[0027] Working principle: The connection position between the filter connector and the cavity (line connector and filter box 1) (SMP connector 7 and cover 9) uses glass sintering technology and adds a sealing ring 8 to effectively ensure air tightness; after debugging, the tuning screw 6 is fully covered with UV curing glue to increase air tightness; the position of the cover 9 and the cavity is sealed using screw compression and welding technology, so that the internal space of the cavity is completely isolated from the external space, the air pressure in the filter is stable, and the air pressure in the cavity will not decrease after the aircraft flies to a high altitude, thereby avoiding low-pressure breakdown, making the filter more applicable and more stable.
[0028] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0029] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present invention and features of different embodiments or examples without contradiction.
[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A filter capable of adapting to low pressure environment, characterized in that: It comprises a filter box body and a cover plate, wherein a cavity is provided in the filter box body, and a plurality of groups of mounting column feet are arranged in the cavity, and a front tap and a flying rod are installed on each group of mounting column feet, an antenna tap is arranged above the flying rod, and a resonant column is sleeved on the outer side of the mounting column feet; The cover plate is fixedly arranged in the upper part of the cavity, an SMP connector is arranged on the cover plate just above the antenna tap, a sealing ring is arranged at the connection position between the SMP connector and the cover plate, and a tuning screw is arranged on the upper part of the SMP connector.
2. A filter capable of adapting to low pressure environment according to claim 1, characterized in that: The bottom of the filter box body is connected with an antenna port connector, and a sealing ring is also provided at the connection position between the antenna port connector and the filter box body.
3. The filter capable of adapting to low pressure environment according to claim 1, characterized in that: The cover plate is adapted to the shape of the cavity, and the connection position between the cover plate and the filter box body is fixed and sealed by welding.
4. The filter capable of adapting to low pressure environment according to claim 1, characterized in that: A UV curing adhesive is provided at the connection position between the tuning screw and the cover plate, and the UV curing adhesive fully covers the connection position between the tuning screw and the cover plate.
5. The filter capable of adapting to low pressure environment according to claim 1, characterized in that: An insulating medium is arranged on the outer side of the antenna tap.
6. The filter capable of adapting to low pressure environment according to claim 1, characterized in that: The filter box body is made of metal.