Airtight structure of seeker and seeker

Abstract

The utility model discloses an airtight structure of a seeker and the seeker, and relates to the technical field of seeker design and manufacture. The frame servo system is fixedly mounted on the bottom plate; the spherical cover covers the frame servo system; the sealing ring is arranged between the bottom plate and the ball cover so as to seal the end face of the frame servo system between the bottom plate and the ball cover; the inflation valve or the air nozzle is arranged on the bottom plate so as to vacuumize and inflate nitrogen into an airtight cabin formed between the bottom plate and the spherical cover; and the airtight plug connector is arranged on the bottom plate so as to realize data communication between the inside and the outside of the airtight cabin. The sealing space is small, the airtight reliability is high, and the gas leakage rate is low.

Description

Technical Field

[0001] The utility model relates to the technical field of seeker design and manufacturing, in particular to an airtight structure of a seeker and a seeker adopting the airtight structure. Background Art

[0002] The seeker is a device installed on the head of a guided weapon to measure the motion parameters of the target relative to the guided weapon and generate guidance information.

[0003] Airtightness is a key element in seeker design, and its sealing performance is closely related to the seeker's storage life and environmental adaptability. A well-sealed seeker can prevent internal fogging, which can affect seeker performance, such as accuracy in detecting and tracking targets.

[0004] The traditional seeker airtight design seals the entire seeker, resulting in a large sealing space, high gas leakage rate, poor sealing reliability, and a socket-type structure. The product is difficult to maintain and disassemble. Utility Model Content

[0005] The utility model provides an airtight structure of a seeker and the seeker, aiming to at least solve the problem of poor sealing reliability of the seeker.

[0006] The utility model provides an airtight structure of a seeker, which includes: a base plate; a frame servo system, which is fixedly mounted on the base plate; a spherical cover, which covers the frame servo system; a sealing ring, which is arranged between the base plate and the spherical cover to achieve end face sealing of the frame servo system between the base plate and the spherical cover; an inflation valve or an air nozzle, which is arranged on the base plate to achieve vacuum and nitrogen filling of the airtight cabin formed between the base plate and the spherical cover; and an airtight connector, which is arranged on the base plate to achieve data communication between the inside and outside of the airtight cabin.

[0007] Preferably, the airtight structure further includes: a first screw connecting the sealing end surface of the base plate and the sealing end surface of the spherical cover.

[0008] Preferably, at least one of the sealing end surface of the base plate and the sealing end surface of the spherical cover is coated with sealant.

[0009] Preferably, the sealing ring is made of silicone rubber or indium wire.

[0010] Preferably, a sealing groove is provided on one of the sealing end surface of the base plate and the sealing end surface of the ball cover, and the sealing ring is installed in the sealing groove.

[0011] Preferably, the number of the sealing grooves may be one or more, and correspondingly, the number of the sealing rings may be one or more.

[0012] The airtight structure of the guide head provided by the utility model is only designed to be airtight for the frame servo system, and the sealing space is small, which can reduce the gas leakage rate and improve the sealing reliability. Secondly, the sealing structure of the frame servo system no longer adopts the traditional socket structure, but adopts an end face sealing structure, that is, the airtightness of the frame servo system is achieved by connecting the end seal of the base plate and the ball cover, and the sealing ring is arranged on the sealing end face, which can also reduce the gas leakage rate and improve the sealing reliability. Thirdly, only airtight connectors and inflation valves are set on the base plate, which reduces the number of components that affect the airtightness to a minimum, can further reduce the gas leakage rate and improve the sealing reliability.

[0013] The present utility model also provides a seeker, which comprises: the airtight structure of the seeker mentioned above; a shell and a circuit board assembly fixedly installed in the shell; wherein the shell and the base plate are installed in a sleeve manner, thereby forming a non-airtight cabin between the shell and the base plate in which the circuit board assembly is installed.

[0014] Preferably, the size of the shell is larger than that of the base plate, so that the shell is sleeved outside the base plate.

[0015] Preferably, the guide head further comprises: a second screw connecting the sleeve surface of the base plate and the sleeve surface of the shell.

[0016] The present invention provides a guide head, which adopts the airtight structure of the aforementioned guide head, thereby improving the sealing reliability of the frame servo system containing the lens assembly in the guide head. In addition, compared with a fully airtight guide head (i.e., the guide head is completely sealed), the circuit board assembly 7 in the guide head of the present invention is not airtightly sealed, and the shell 8 is easy to disassemble and assemble. The circuit board assembly 7 can be easily tested, installed and maintained without affecting the airtightness of the frame servo system, so the performance is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the airtight structure of the seeker provided by the utility model;

[0018] Figure 2 It is a schematic diagram of the seeker provided by the utility model. DETAILED DESCRIPTION

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the airtight structure of the seeker provided by the utility model, as shown in FIG. Figure 1As shown, the airtight structure includes: a ball cover 1, a frame servo system 2 fixedly mounted on a base plate 6, a sealing ring 3, an inflation valve 4, an airtight connector 5, and a base plate 6.

[0021] The ball cover 1 covers the frame servo system 2 on the base plate 6 to form an airtight cabin between the ball cover 1 and the base plate 6. Obviously, the airtight cabin is only designed to be airtight for the frame servo system 2. The sealing space is small, which can reduce the gas leakage rate and improve the sealing reliability.

[0022] The sealing ring 3 is arranged between the base plate 6 and the ball cover 1. The material may be silicone rubber or indium wire. The number may be one or more. It is used to achieve end face sealing of the frame servo system 2 between the base plate 6 and the ball cover 1. That is, the end face sealing of the frame servo system 2 is achieved by the sealing ring 3 arranged between the base plate 6 and the ball cover 1. In addition, at least one of the sealing end face of the base plate 6 and the sealing end face of the ball cover 1 needs to be coated with sealant to improve the sealing reliability. Furthermore, a sealing groove can be opened on the base plate 6, and the sealing ring 3 can be installed in the sealing groove. The shape and number of the sealing groove match the shape and number of the sealing ring 3. The airtight design of the frame servo system 2 of the utility model can further reduce the gas leakage rate and improve the sealing reliability by adopting an end face sealing structure and arranging a sealing ring on the sealing end face or even applying sealant.

[0023] The inflation valve or air nozzle 4 is arranged on the bottom plate 6 and penetrates the bottom plate 6 to realize the pumping and inflation of the airtight part, that is, to realize the pumping and inflation of the airtight cabin formed between the bottom plate 6 and the ball cover 1, specifically vacuuming and filling with nitrogen.

[0024] The airtight connector 5 is arranged on the base plate 6 and passes through the base plate 6 to realize data communication between the inside and outside of the airtight cabin, for example, to lead out the internal signal of the airtight cabin and communicate data with the circuit board assembly 7 outside the airtight cabin.

[0025] The utility model only provides the airtight connector 5 and the inflation valve / air nozzle 4 on the bottom plate 6, which can reduce the number of components affecting the airtightness to a minimum, further reduce the gas leakage rate, and improve the sealing reliability.

[0026] Furthermore, the airtight structure may further include a first screw ( Figure 1 (not shown), the first screw can be used to press the sealing end surface of the bottom plate 6 and the sealing end surface of the ball cover 1. The number of the first screws can be multiple and evenly distributed. When in use, a gasket can be used in conjunction with the sealing end surface to better press the sealing end surface. Figure 2 The two screws for pressing the sealing end faces can be clearly seen in the cross-sectional view. The utility model can ensure that the connection between the sealing end faces is more stable and improve the sealing reliability by pressing the sealing end faces with the first screw.

[0027] Figure 2 This is a schematic diagram of the seeker provided by the utility model, such as Figure 2 As shown, the seeker adopts a new sealing method / structure to solve the problems of difficult maintenance and poor sealing reliability of the airtight seeker. The seeker includes Figure 1 The airtight structure of the seeker shown includes a ball cover 1, a frame servo system 2, a sealing ring 3, an inflation valve 4, an airtight connector 5, and a base plate 6. It also includes a housing 8 and a circuit board assembly 7 fixedly installed in the housing 8.

[0028] The base plate 6 and the ball cover 1 are sealed through the end face, a sealing ring 3 is provided on the sealing end face, and the two sealing end faces are compressed and connected by a first screw, which significantly improves the maintenance performance. In addition, it is also necessary to apply sealant on the sealing end face for treatment.

[0029] By sealing the end faces of the base plate 6 and the ball cover 1, an airtight design is achieved only for the frame servo system 2. The base plate 6 is provided with an airtight connector 5 and an inflation valve 4, which reduces the number of components that affect the airtightness to a minimum and improves the airtight reliability.

[0030] The shell 8 and the bottom plate 6 are installed in a sleeve manner to form a non-airtight compartment between the shell 8 and the bottom plate 6. The circuit board assembly 7 is arranged in the non-airtight compartment. In other words, the present invention does not provide an airtight design for the circuit board assembly 7. This part does not need to be sealed, which can facilitate the testing and installation of the circuit board assembly 7 and improve the testing and maintenance performance. Figure 2 The size of the shell 8 is slightly larger than that of the base plate 6 , so that the shell 8 can be sleeved on the base plate 6 .

[0031] Furthermore, the guide head may further include a second screw ( Figure 2 (not shown in the figure), the second screw can be used to press the socket surface of the base plate 6 and the socket surface of the housing 8 together, facilitating the assembly and disassembly of the housing 8. The number of second screws can be multiple and evenly distributed. To better compress the sealing end surface, a gasket can be used in conjunction. The frame servo system 2 in the airtight portion of the present invention is isolated from the circuit board assembly 7 in the non-airtight portion. Therefore, the circuit board assembly 7 can be easily tested, installed, and maintained without affecting the airtightness of the frame servo system 2. Compared with a fully airtight guide head, it has better performance.

[0032] The airtight structure of the guide head of the present invention adopts an end-face sealed structure, and the frame servo system 2 including the lens assembly is sealed separately to achieve isolation from the circuit board assembly 7. The present invention greatly improves the maintainability and sealing reliability of the product.

[0033] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention shall fall within the scope of the present invention.

Claims

1. An airtight structure of a seeker, characterized in that: The airtight structure comprises: base plate; a frame servo system fixedly mounted on the base plate; a spherical cover, which covers the frame servo system; a sealing ring, disposed between the base plate and the spherical cover to seal the end face of the frame servo system between the base plate and the spherical cover; An air filling valve or air nozzle is arranged on the bottom plate to realize vacuuming and nitrogen filling of the airtight cabin formed between the bottom plate and the spherical cover; An airtight connector is arranged on the bottom plate to realize data communication between the inside and outside of the airtight cabin.

2. The airtight structure according to claim 1, characterized in that: The airtight structure further includes a first screw connecting the sealing end surface of the base plate and the sealing end surface of the ball cover.

3. The airtight structure according to claim 2, characterized in that: At least one of the sealing end surface of the base plate and the sealing end surface of the ball cover is coated with sealant.

4. The airtight structure according to any one of claims 1 to 3, characterized in that: The sealing ring is made of silicone rubber or indium wire.

5. The airtight structure according to claim 1, characterized in that: A sealing groove is provided on one of the sealing end surface of the base plate and the sealing end surface of the ball cover, and the sealing ring is installed in the sealing groove.

6. The airtight structure according to claim 5, characterized in that: The number of the sealing grooves is one or more, and correspondingly, the number of the sealing rings is one or more.

7. A seeker, characterized in that: include: The airtight structure of the seeker according to any one of claims 1 to 6; a housing and a circuit board assembly fixedly mounted in the housing; The shell and the bottom plate are installed in a sleeve manner, so that a non-airtight compartment containing the circuit board assembly is formed between the shell and the bottom plate.

8. The seeker according to claim 7, characterized in that: The size of the shell is larger than that of the base plate, so that the shell is sleeved outside the base plate.

9. The seeker according to claim 7 or 8, characterized in that: The guide head further includes a second screw connecting the sleeve surface of the base plate and the sleeve surface of the shell.

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