A sealing device for a photoelectric turntable and a method of using the same

Abstract

The present invention proposes a sealing device for a photoelectric turntable and a method of using the same, and belongs to the field of photoelectric turntable sealing. The problem that the sealing performance of the photoelectric turntable cannot meet the demand is solved. The two ends of the load compartment of the photoelectric turntable are connected to the main frame through a rotating shaft, and the sealing device is concentrically arranged on the outside of the rotating shaft. The sealing device includes a mounting flange and a flexible cavity. Both sides of the flexible cavity are provided with mounting flanges, and the two mounting flanges are respectively connected to the load compartment and the main frame. The flexible cavity is an annular structure of an internal cavity, and the inner diameter and outer diameter of the flexible cavity are flexible walls. Both sides of the flexible cavity are clamping surfaces, and the clamping surfaces are connected to the mounting flange. A plurality of flexible grooves are arranged on the flexible wall along the circumferential direction, and the flexible grooves are located in the internal cavity of the flexible cavity. The flexible cavity is filled with a sealing medium. It is mainly used for sealing and limiting photoelectric turntables.

Description

Technical Field

[0001] The invention belongs to the field of photoelectric turntable sealing, and in particular relates to a photoelectric turntable sealing device and a use method thereof. Background Art

[0002] The optoelectronic turntable is a high-precision precision reconnaissance equipment that is increasingly used in reconnaissance aircraft, reconnaissance vehicles and ships. The interior of the optoelectronic turntable carries precision optical instruments and bearings, which are extremely sensitive to moisture, sand and dust. Once damaged, the economic losses and time costs are huge. Therefore, it is necessary to maintain an environment relatively isolated from the outside world for the optical instruments and bearings, which relies on the sealing of the optoelectronic turntable. With the increase in the application scenarios of the optoelectronic turntable, users have higher and higher requirements for the environmental adaptability of the optoelectronic turntable, which also puts higher requirements on the sealing.

[0003] The commonly used sealing forms of optoelectronic turntables are divided into static seals and dynamic seals. Static seals usually need to be used in conjunction with sealing rings, and have better sealing performance than dynamic seals. Dynamic seals generally use spring energy storage rings or magnetic fluids. When using spring energy storage rings, wear needs to be considered, and the spring energy storage rings need to be compressed, introducing large friction. When using magnetic fluids, the sealing performance is good, but the price is more expensive, and special installation requirements are put forward for the turntable structure, increasing the design and processing costs.

[0004] Generally, the pitch motion of an optoelectronic turntable has a specified angular range, and some will also impose restrictions on azimuth motion and will not rotate indefinitely. When designing equipment with high sealing requirements, magnetic fluid is generally used here. This not only increases the cost, but also wastes the performance of the magnetic fluid. In addition, the magnetic fluid does not provide a limit function at this time, and additional limit design is required. Summary of the invention

[0005] In view of this, the present invention aims to provide a sealing device for a photoelectric turntable and a method of using the same, so as to solve the problem that the sealing performance of the photoelectric turntable cannot meet the demand.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sealing device for a photoelectric turntable, wherein both ends of the load compartment of the photoelectric turntable are connected to the main frame through a rotating shaft, and the sealing device is concentrically arranged on the outside of the rotating shaft, and the sealing device includes a mounting flange and a flexible cavity, and mounting flanges are arranged on both sides of the flexible cavity, and the two mounting flanges are respectively connected to the load compartment and the main frame, and the flexible cavity is an annular structure with an internal cavity, and the inner diameter and outer diameter of the flexible cavity are flexible walls, and the two sides of the flexible cavity are clamping surfaces, and the clamping surfaces are connected to the mounting flanges, and a plurality of flexible grooves are arranged on the flexible wall along the circumferential direction, and the flexible grooves are located in the internal cavity of the flexible cavity, and the flexible cavity is filled with a sealing medium.

[0007] Furthermore, the flexible cavity includes an inner cavity and an outer cavity, the inner cavity is connected to the outer cavity via a compression flange, and the inner cavity and the outer cavity are enclosed to form an internal cavity.

[0008] Furthermore, a pressure plate is arranged at intervals on the inner diameter side of the mounting flange, the outer cavity is connected to the mounting flange via a clamping flange, and the inner cavity is connected to the pressure plate via a clamping flange.

[0009] Furthermore, the circumferential direction of the inner cavity body is an inner cavity flexible wall, and a plurality of inner cavity flexible grooves are arranged on the inner cavity flexible wall along the circumferential direction. The two sides of the inner cavity body are inner cavity clamping surfaces, and the inner cavity clamping surfaces are connected to the pressure plate through a clamping flange. The circumferential direction of the outer cavity body is an outer cavity flexible wall, and a plurality of outer cavity flexible grooves are arranged on the outer cavity flexible wall along the circumferential direction. The two sides of the outer cavity body are outer cavity clamping surfaces, and the outer cavity clamping surfaces are connected to the mounting flange through a clamping flange.

[0010] Furthermore, the clamping flange includes an outer clamping surface and an inner clamping surface, the outer clamping surface is connected to the outer cavity clamping surface, and the inner clamping surface is connected to the inner cavity clamping surface.

[0011] Furthermore, a valve hole is provided on the clamping flange, the valve hole is communicated with the inner cavity of the flexible cavity, the valve hole is connected to a valve, and the flexible cavity is filled with a sealing medium through the valve.

[0012] Furthermore, the thickness of the flexible groove is smaller than that of the flexible wall.

[0013] Furthermore, the sealing medium is nitrogen or hydraulic oil.

[0014] Furthermore, a sealing groove is provided on the connection surface between the mounting flange, the load compartment and the main frame, and a sealing strip is installed in the sealing groove.

[0015] The present invention also provides a method for using a sealing device for a photoelectric turntable, which is specifically as follows: the load cabin is driven to rotate by a rotating shaft, and the flexible cavity is simultaneously driven to twist when the load cabin rotates. At this time, the flexible cavity is deformed, and the internal cavity volume of the flexible cavity changes, resulting in a change in pressure. The flexible groove is deformed radially under the action of the internal pressure of the cavity, and the volume and pressure changes of the flexible cavity are compensated by the deformation of the flexible groove; when the load cabin rotates to a limited angle, the deformation of the flexible groove reaches a limit, and the compensation for the volume and pressure changes of the flexible cavity reaches a limit, and the load cabin cannot continue to rotate, thereby limiting the load cabin.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a sealing device for a photoelectric turntable and a method of using the same. Compared with existing sealing forms such as magnetic fluid, spring energy storage ring and felt ring, the present invention cooperates with the flexible cavity and the sealing medium, and compensates for the volume and pressure changes of the flexible cavity through the deformation of the flexible groove, thereby converting the dynamic seal into a static seal, thereby improving the sealing performance of the photoelectric turntable.

[0017] The present invention can achieve the position limiting of the photoelectric turntable through the design of the flexible groove, so that the photoelectric turntable can work within the set angle range, without wasting the sealing performance of the device and without introducing additional friction. Compared with the existing photoelectric turntable dynamic sealing form and position limiting method, the present invention combines sealing and position limiting through the reasonable design of the flexible cavity and the sealing medium, simplifies the structure of the photoelectric turntable, and improves the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the connection structure of a sealing device of a photoelectric turntable according to the present invention;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of a sealing device of a photoelectric turntable according to the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the flexible cavity of the present invention;

[0022] Figure 4 This is a schematic diagram of the outer cavity structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the inner cavity structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the clamping flange structure described in the present invention.

[0025] In the figure:

[0026] 1-load compartment, 2-main frame, 3-mounting flange, 4-flexible cavity, 5-valve, 6-pressure flange, 7-rotating shaft, 8-inner cavity, 9-outer cavity, 10-sealing strip, 11-pressure plate, 12-flexible wall, 13-flexible groove, 14-pressure surface, 15-outer cavity flexible wall, 16-outer cavity flexible groove, 17-outer cavity pressure surface, 18-inner cavity flexible wall, 19-inner cavity flexible groove, 20-inner cavity pressure surface, 21-valve hole, 22-outer pressure surface, 23-inner pressure surface. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0028] See also Figure 1-6 The present embodiment is described as a sealing device for an optoelectronic turntable, wherein both ends of a load compartment 1 of the optoelectronic turntable are connected to a main frame 2 via a rotating shaft 7, and a sealing device is concentrically arranged on the outside of the rotating shaft 7, and the sealing device comprises a mounting flange 3 and a flexible cavity 4, and mounting flanges 3 are arranged on both sides of the flexible cavity 4, and the two mounting flanges 3 are respectively connected to the load compartment 1 and the main frame 2, and the flexible cavity 4 is an annular structure of an internal cavity, and the inner diameter and outer diameter of the flexible cavity 4 are flexible walls 12, and both sides of the flexible cavity 4 are clamping surfaces 14, and the clamping surfaces 14 are connected to the mounting flange 3, and a plurality of flexible grooves 13 are arranged on the flexible wall 12 along the circumferential direction, and the flexible grooves 13 are located in the internal cavity of the flexible cavity 4, and the flexible cavity 4 is filled with a sealing medium.

[0029] In this embodiment, the flexible cavity 4 includes an inner cavity 8 and an outer cavity 9. The inner cavity 8 and the outer cavity 9 are connected via a clamping flange 6. The inner cavity 8 and the outer cavity 9 together form an internal cavity.

[0030] In this embodiment, a pressure plate 11 is arranged at intervals on the inner diameter side of the mounting flange 3 , the outer cavity 9 is connected to the mounting flange 3 via the clamping flange 6 , and the inner cavity 8 is connected to the pressure plate 11 via the clamping flange 6 .

[0031] In this embodiment, the circumferential direction of the inner cavity body 8 is an inner cavity flexible wall 18, and a plurality of inner cavity flexible grooves 19 are arranged on the inner cavity flexible wall 18 along the circumferential direction. The two sides of the inner cavity body 8 are inner cavity pressing surfaces 20, and the inner cavity pressing surfaces 20 are connected to the pressure plate 11 through a pressing flange 6. The circumferential direction of the outer cavity body 9 is an outer cavity flexible wall 15, and a plurality of outer cavity flexible grooves 16 are arranged on the outer cavity flexible wall 15 along the circumferential direction. The two sides of the outer cavity body 9 are outer cavity pressing surfaces 17, and the outer cavity pressing surfaces 17 are connected to the mounting flange 3 through a pressing flange 6. A glue with strong sealing and adhesion can be applied to the pressing position, and the pressing flange 6 is fastened to the mounting flange 3 and the pressure plate 11 through threads.

[0032] In this embodiment, the clamping flange 6 includes an outer clamping surface 22 and an inner clamping surface 23 . The outer clamping surface 22 is connected to the outer cavity clamping surface 17 , and the inner clamping surface 23 is connected to the inner cavity clamping surface 20 .

[0033] In this embodiment, a valve hole 21 is formed on the clamping flange 6 , and the valve hole 21 is communicated with the inner cavity of the flexible cavity 4 . The valve hole 21 is connected to the valve 5 , and the flexible cavity 4 is filled with a sealing medium through the valve 5 .

[0034] In this embodiment, the flexible cavity 4 is made of flexible material, such as corrosion-resistant film and the like. The flexible cavity 4 can be deformed, and the flexible groove 13 can be deformed under external deformation and pressure. The rigidity of the flexible groove 13 is lower than that of other positions. The rigidity requirement can be achieved by making the thickness of the flexible groove 13 smaller than the flexible wall 12.

[0035] In this embodiment, the sealing medium is nitrogen or hydraulic oil to ensure that the internal cavity pressure of the flexible cavity 4 is appropriate.

[0036] In this embodiment, a sealing groove is provided on the connection surface between the mounting flange 3 and the load compartment 1 and the main frame 2, and a sealing strip 10 is installed in the sealing groove.

[0037] This embodiment is a method for using a sealing device of a photoelectric turntable, which is specifically as follows:

[0038] During assembly, the sealing medium is filled into the flexible cavity 4 through the valve 5, and the appropriate pressure is maintained and the installation is performed at a suitable angle.

[0039] During operation, the load cabin 1 is driven to rotate by the rotating shaft 7, and the load cabin 1 rotates and simultaneously drives the flexible cavity 4 to twist. At this time, the flexible cavity 4 is deformed, and the internal cavity volume of the flexible cavity 4 changes, resulting in a change in pressure. The flexible groove 13 is deformed radially under the pressure inside the cavity, and the volume and pressure changes of the flexible cavity 4 are compensated by the deformation of the flexible groove 13. Specifically, when the flexible cavity 4 is deformed, the internal space of the flexible cavity 4 is squeezed, resulting in an increase in the internal pressure of the flexible cavity 4. Under the action of the rising pressure, the flexible groove 13 gradually moves outward from the initial state of being located inside the flexible wall 12 until it protrudes outside the flexible wall 12, and the volume and pressure changes of the flexible cavity 4 are compensated by the state change process of the flexible groove 13.

[0040] During the rotation process, the sealing strip 10 always maintains static sealing between the mounting flange 3 and the load compartment 1, and between the mounting flange 3 and the main frame 2. There is no dynamic sealing, and no additional friction is introduced, thereby improving the sealing performance.

[0041] When the load compartment 1 rotates to a limited angle, the deformation of the flexible groove 13 reaches the limit, and the compensation for the volume and pressure changes of the flexible cavity 4 reaches the limit, and the load compartment 1 cannot continue to rotate, thereby limiting the load compartment 1. The angle range of the rotation limit can be changed by changing the structure of the flexible cavity 4, the installation angle, the sealing medium material or the pressure.

[0042] The optoelectronic turntable plays an important role in reconnaissance aircraft, reconnaissance vehicles and ships. Its load compartment 1 is connected to the main frame 2 through a rotating shaft 7, and a sealing device is arranged around the rotating shaft 7. The mounting flange 3 is respectively connected to the load compartment 1 and the main frame 2, and is an important connecting component of the sealing device. The connection surface between the load compartment 1 and the main frame 2 is provided with a sealing groove, and a sealing strip 10 is installed in the sealing groove, so as to ensure the sealing of the connection part.

[0043] As the core part of the sealing device, the flexible cavity 4 adopts a special structural design. The inner diameter and outer diameter of the annular structure form a flexible wall 12, and the pressing surfaces 14 on both sides are closely connected with the mounting flange 3 to ensure the stability of the overall structure. The flexible grooves 13 on the flexible wall 12 are distributed in the internal cavity in the circumferential direction, and the thickness of the flexible grooves 13 is less than that of the flexible wall 12. This design makes the flexible grooves 13 more likely to deform when subjected to pressure. The flexible cavity 4 is divided into an inner cavity body 8 and an outer cavity body 9, which are connected by a pressing flange 6. The circumferential direction of the inner cavity body 8 is an inner cavity flexible wall 18, on which an inner cavity flexible groove 19 is arranged, and the inner cavity pressing surfaces 20 on both sides are connected to the pressing plate 11 through the pressing flange 6; the circumferential direction of the outer cavity body 9 is an outer cavity flexible wall 15, which is provided with an outer cavity flexible groove 16, and the outer cavity pressing surfaces 17 on both sides are connected to the mounting flange 3 through the pressing flange 6. The pressing flange 6 is tightened by threads, and a glue with strong sealing and adhesion is applied at the pressing position to further enhance the tightness of the connection. The valve hole 21 on the clamping flange 6 is connected to the valve 5, so as to facilitate the filling of the sealing medium into the flexible cavity 4. The sealing medium may be nitrogen or hydraulic oil to ensure that the internal cavity pressure is appropriate.

[0044] During the assembly stage, first of all, each component should be checked to ensure that the mounting flange 3, flexible cavity 4, clamping flange 6, rotating shaft 7, inner cavity 8, outer cavity 9, sealing strip 10, pressing plate 11 and other components are not damaged or deformed, and the valve 5 can work normally. Install the sealing strip 10 in the sealing groove of the mounting flange 3 to ensure that the installation is firm and the seal is good. Then assemble the inner cavity 8 and the outer cavity 9 through the clamping flange 6, pay attention to align the flexible grooves on the inner cavity flexible wall 18 and the outer cavity flexible wall 15, tighten the clamping flange 6 by thread, and apply a proper amount of glue on the clamping surface to enhance the connection sealing. Then connect the assembled flexible cavity 4 to the load cabin 1 and the main frame 2 through the mounting flange 3 to ensure a tight connection. Finally, fill the sealing medium, such as nitrogen or hydraulic oil, into the flexible cavity 4 through the valve 5. During the filling process, use the pressure detection equipment to monitor the pressure so that it reaches the appropriate pressure value. At the same time, pay attention to check whether the entire sealing device has leakage.

[0045] In the working stage, when the photoelectric turntable starts to work, the shaft 7 drives the load cabin 1 to rotate, and the load cabin 1 drives the flexible cavity 4 to twist synchronously. At this time, the flexible cavity 4 is deformed due to the torsional force, and the volume of the internal cavity changes accordingly, resulting in pressure changes. For example, when the flexible cavity 4 is squeezed, the internal space becomes smaller and the pressure rises. Under the action of pressure, the flexible groove 13 begins to deform from the initial position, gradually moving outward from the inside of the flexible wall 12 until it protrudes from the outside of the flexible wall 12. This process effectively compensates for the volume and pressure changes of the flexible cavity 4. During the entire rotation process, the sealing strip 10 between the mounting flange 3 and the load cabin 1 and the main frame 2 always maintains a static sealing state, no dynamic sealing is generated, and no additional friction is introduced, which greatly improves the sealing performance. When the load cabin 1 rotates to a limited angle, the deformation of the flexible groove 13 reaches the limit, and it can no longer continue to compensate for the volume and pressure changes of the flexible cavity 4. At this time, the load cabin 1 cannot continue to rotate, thereby realizing the limit function of the load cabin 1. In practical applications, the angle range of the rotation limit can be precisely changed according to the specific working requirements of the optoelectronic turntable by adjusting the structural parameters of the flexible cavity 4 (such as the number, depth, width, etc. of the flexible grooves 13), the installation angle, the material or pressure of the sealing medium, and other factors to adapt to different usage scenarios.

[0046] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A sealing device for a photoelectric turntable, characterized in that: The two ends of the load compartment (1) of the photoelectric turntable are connected to the main frame (2) through a rotating shaft (7), and a sealing device is concentrically arranged on the outside of the rotating shaft (7). The sealing device comprises a mounting flange (3) and a flexible cavity (4). Both sides of the flexible cavity (4) are provided with mounting flanges (3), and the two mounting flanges (3) are respectively connected to the load compartment (1) and the main frame (2). The flexible cavity (4) is an annular structure with an internal cavity, and the inner diameter and outer diameter of the flexible cavity (4) are flexible walls (12). The flexible cavity (4) ) are clamping surfaces (14) on both sides, the clamping surfaces (14) are connected to the mounting flange (3), a plurality of flexible grooves (13) are arranged on the flexible wall (12) along the circumferential direction, the flexible grooves (13) are located in the inner cavity of the flexible cavity (4), the flexible cavity (4) is filled with a sealing medium, the flexible cavity (4) comprises an inner cavity body (8) and an outer cavity body (9), the inner cavity body (8) and the outer cavity body (9) are connected via a clamping flange (6), and the inner cavity body (8) and the outer cavity body (9) are enclosed to form an inner cavity.

2. The sealing device of a photoelectric turntable according to claim 1, characterized in that: A pressure plate (11) is arranged at intervals on the inner diameter side of the mounting flange (3); the outer cavity (9) is connected to the mounting flange (3) via a clamping flange (6); and the inner cavity (8) is connected to the pressure plate (11) via a clamping flange (6).

3. The sealing device of a photoelectric turntable according to claim 2, characterized in that: The circumferential direction of the inner cavity body (8) is an inner cavity flexible wall (18), and a plurality of inner cavity flexible grooves (19) are arranged on the inner cavity flexible wall (18) along the circumferential direction. The two sides of the inner cavity body (8) are inner cavity clamping surfaces (20), and the inner cavity clamping surfaces (20) are connected to the pressure plate (11) through a clamping flange (6). The circumferential direction of the outer cavity body (9) is an outer cavity flexible wall (15), and a plurality of outer cavity flexible grooves (16) are arranged on the outer cavity flexible wall (15) along the circumferential direction. The two sides of the outer cavity body (9) are outer cavity clamping surfaces (17), and the outer cavity clamping surfaces (17) are connected to the mounting flange (3) through a clamping flange (6).

4. The sealing device of a photoelectric turntable according to claim 3, characterized in that: The clamping flange (6) comprises an outer clamping surface (22) and an inner clamping surface (23), wherein the outer clamping surface (22) is connected to the outer cavity clamping surface (17), and the inner clamping surface (23) is connected to the inner cavity clamping surface (20).

5. A sealing device for a photoelectric turntable according to any one of claims 1 to 4, characterized in that: The clamping flange (6) is provided with a valve hole (21), the valve hole (21) is communicated with the inner cavity of the flexible cavity (4), the valve hole (21) is connected with a valve (5), and the flexible cavity (4) is filled with a sealing medium through the valve (5).

6. The sealing device of a photoelectric turntable according to claim 1, characterized in that: The thickness of the flexible groove (13) is smaller than that of the flexible wall (12).

7. The sealing device of a photoelectric turntable according to claim 1, characterized in that: The sealing medium is nitrogen or hydraulic oil.

8. The sealing device of a photoelectric turntable according to claim 1, characterized in that: A sealing groove is provided on the outer connecting surface of the mounting flange (3), and a sealing strip (10) is installed in the sealing groove.

9. A method for using the sealing device of the photoelectric turntable according to claim 1, characterized in that: The load cabin (1) is driven to rotate by the rotating shaft (7). When the load cabin (1) rotates, the flexible cavity (4) is simultaneously driven to twist. At this time, the flexible cavity (4) is deformed, and the internal cavity volume of the flexible cavity (4) changes, resulting in a change in pressure. The flexible groove (13) is deformed in the radial direction under the action of the internal pressure of the cavity. The volume and pressure changes of the flexible cavity (4) are compensated by the deformation of the flexible groove (13); when the load cabin (1) rotates to a limited angle, the deformation of the flexible groove (13) reaches a limit, and the compensation for the volume and pressure changes of the flexible cavity (4) reaches a limit. The load cabin (1) cannot continue to rotate, thereby limiting the position of the load cabin (1).

Images