A high-hermetic direct-acting dynamic-fit seal assembly

Abstract

The utility model relates to the field of sealing assembly discloses a high air tight direct acting type dynamic cooperation sealing assembly, include: stress ring, force transmission ring and sealing ring, stress ring installs in the top, is used for transmitting medium pressure, moves down, force transmission ring installs in the middle, is used for increasing sealing surface pressure force, improves sealing effect, sealing ring installs in the bottom, is used for sealing sealing gap, prevents medium from leaking from sealing gap. Preferably, the stress ring bottom extends downward and forms a downward protrusion. In the utility model, through the double-path pressure conduction design of the slider on both sides and the force transmission ring body, when the medium pressure changes, the slider moves downward to push the side end to contract, and the stress transmits the pressure to the spring at the same time, the spring enhances the compression force of the sealing gap between the sealing ring itself and the dynamic seal through the elastic force, makes the pressure drop force linearly increase with the medium pressure, and further realizes dynamic self -adaptation adjustment, realizes the high air tightness self -tight sealing under the complex condition.

Description

Technical Field

[0001] This utility model relates to the field of sealing components, and in particular to a high airtight direct-acting dynamic-fit sealing component. Background Technology

[0002] Gas-insulated switchgear, environmental protection switchgear, and ring main unit are all core equipment in high-voltage power distribution systems. They are typically filled with insulating media to isolate high-voltage live conductors, maintain insulation performance, and extinguish arcs. Therefore, they require strict airtightness and dynamic sealing to prevent leakage caused by minute relative movements of the sealing components over long-term use.

[0003] In the existing technology, the sealing components used in the above-mentioned cabinets generally have the problem that the sealing force cannot be dynamically and adaptively adjusted due to the fluctuation of the medium pressure. In addition, the elastic materials used are prone to aging and failure in high-temperature environments, and the sealing gap lacks an automatic compensation mechanism after wear. As a result, the leakage rate is high and the maintenance cost is high under complex working conditions such as high pressure and dynamic environment, making it difficult to meet the high airtightness sealing requirements.

[0004] Therefore, this application provides a high-airtightness direct-acting dynamic-fit sealing assembly to meet the requirements. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a high airtight direct-acting dynamic fit sealing component to solve the problem that the sealing force cannot be dynamically and adaptively adjusted due to the fluctuation of the medium pressure and the lack of an automatic compensation mechanism.

[0006] To solve the problems mentioned above, this utility model is implemented through the following technical solution.

[0007] A high-airtightness direct-acting dynamic-fit sealing assembly includes:

[0008] Force-bearing ring, force-transmitting ring, and sealing ring;

[0009] The force-bearing ring is installed at the top and is used to transmit the medium pressure and move downwards;

[0010] The force transmission ring is installed in the middle to increase the sealing surface clamping force and improve the sealing effect;

[0011] The sealing ring is installed at the bottom to seal the sealing gap and prevent the medium from leaking out of the sealing gap.

[0012] Preferably, the dynamic seal includes a mounting base fixedly connected to the outside and a rotating shaft rotatably connected. The dynamic seal is disposed outside the force-bearing ring, the force-transmitting ring and the sealing ring, together forming a complete high-airtightness braking type mating seal system.

[0013] Preferably, the bottom of the force-bearing ring extends downward to form a downward pressing protrusion.

[0014] Preferably, the force transmission ring comprises:

[0015] A force-receiving groove is formed in the middle of the force-transmitting ring and is recessed downward to accommodate the downward pressure protrusion;

[0016] The side ends are formed by the force transmission ring extending to both sides;

[0017] The force-guiding protrusion is formed by the force-transmitting ring extending downwards towards the bottom;

[0018] The skeleton, set inside the force transmission ring, has a certain elasticity and is used to provide the force transmission ring with the elasticity to return to its original shape.

[0019] Preferably, the skeleton is a high-temperature resistant elastic material, used to drive the side ends to contract inward and expand outward to a certain extent.

[0020] Preferably, the force transmission ring further includes:

[0021] The chute is formed on the outer sidewall of the two said side ends;

[0022] The force-bearing block slides within the groove, with its top extending to the outside of the force-transmitting ring, and is used to transmit medium pressure.

[0023] A sliding block is located in the groove and fixedly connected to the side wall of the force-bearing block to prevent the force-bearing block from coming out of the groove;

[0024] A spring is disposed in the groove, with one end fixedly connected to the inner wall of the groove and the other end fixedly connected to the sliding block, for providing elastic force for the movement of the force-bearing block.

[0025] Preferably, the sealing ring includes a force-guiding groove formed in the middle of itself.

[0026] Preferably, the sealing effect is achieved when the dynamic seal shaft rotates or remains stationary by the tight fit between the force-receiving ring, the force-transmitting ring, the sealing ring, and the inner wall of the dynamic seal.

[0027] This invention provides a high-airtightness direct-acting dynamic-fit sealing assembly. Compared with the prior art, it has the following advantages:

[0028] 1. Through the dual-path pressure transmission design of the sliders on both sides and the force transmission ring body, when the medium pressure changes, the sliders move downward to push the side end to contract. At the same time, the force is transmitted to the spring. The spring enhances the clamping force of the sealing gap between the sealing ring itself and the dynamic seal through its elasticity, so that the pressure drop force increases synchronously and linearly with the medium pressure, thereby realizing dynamic adaptive adjustment and achieving high airtightness self-tightening seal under complex conditions.

[0029] 2. By setting a high-temperature resistant elastic skeleton inside the force transmission ring, when the sealing surface in contact with the sealing gap is worn and a gap is generated, the restoring force of the skeleton drives the sealing wing to continuously contract inward. The force acts on the sealing ring, giving the sealing ring a downward force, which strengthens the sealing effect. This forms a closed-loop adjustment mechanism that automatically compensates for wear gaps, avoiding the problem that the sealing gap cannot be automatically compensated after wear, and greatly extending the service life of the sealing assembly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0032] Figure 3 This is a schematic diagram of the overall structure of the force-bearing ring, force-transmitting ring, and sealing ring of this utility model.

[0033] Figure 4 This is a schematic cross-sectional view of the force-bearing ring, force-transmitting ring, and sealing ring of this utility model.

[0034] Figure 5 This is a schematic diagram of the cross-sectional structure of the force transmission ring of this utility model.

[0035] Figure 6 This is a schematic diagram of the connection structure of the force transmission ring, slide groove, force receiving block, sliding block and spring of this utility model.

[0036] The attached figures are labeled as follows:

[0037] 10. Force-bearing ring; 11. Downward pressure protrusion; 20. Force-transmitting ring; 21. Force-bearing groove; 22. Side end; 23. Force-guiding protrusion; 24. Skeleton; 25. Slide groove; 26. Force-bearing block; 27. Sliding block; 28. Spring; 30. Sealing ring; 31. Force-guiding groove; 40. Dynamic seal. Detailed Implementation

[0038] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0039] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0040] Reference Figures 1-4A high-airtightness direct-acting dynamic-fit sealing assembly, comprising:

[0041] Force-bearing ring 10, force-transmitting ring 20, and sealing ring 30;

[0042] The force-bearing ring 10 is installed at the top to transmit the medium pressure and moves downward;

[0043] The force transmission ring 20 is installed in the middle to increase the sealing surface clamping force and improve the sealing effect;

[0044] The sealing ring 30 is installed at the bottom to seal the sealing gap and prevent the medium from leaking out of the sealing gap.

[0045] The dynamic seal 40 includes a mounting base fixedly connected to the outside and a rotating shaft rotatably connected. The dynamic seal 40 is located outside the force-bearing ring 10, the force-transmitting ring 20 and the sealing ring 30, together forming a complete high-airtightness braking type mating seal system.

[0046] Furthermore, such as Figures 1 to 3 As shown, the force-bearing ring 10 acts as a pressure transmission element, converting the medium pressure into mechanical displacement; the force-transmitting ring 20 tightly fits the inner wall of the dynamic seal 40 through elastic deformation, thereby generating additional sealing force; the sealing ring 30 achieves physical sealing through geometric fit.

[0047] The bottom of the force-bearing ring 10 extends downward to form a downward pressing protrusion 11.

[0048] Furthermore, such as Figure 2 As shown, the downward pressing protrusion 11 is inserted into the force-bearing groove 21 of the recessed structure in the middle of the force transmission ring 20. When the force ring 10 moves downward under the pressure of the medium, the downward pressing protrusion 11 pushes the internal structure of the force transmission ring 20 to deform, triggering the elastic compensation mechanism of the force transmission ring 20.

[0049] The force transmission ring 20 includes:

[0050] The force-receiving groove 21 is formed in the middle of the force-transmitting ring 20 and is recessed downward to accommodate the downward pressure protrusion 11;

[0051] Side end 22 is formed by the force transmission ring 20 extending to both sides;

[0052] The force-guiding protrusion 23 is formed by the force-transmitting ring 20 extending downwards to the bottom;

[0053] The skeleton 24, set inside the force transmission ring 20, has a certain elasticity and is used to provide the force transmission ring 20 with the elasticity to return to its original shape.

[0054] Furthermore, such as Figure 2 and Figure 3 As shown, the elastic restoring force of the skeleton 24 drives the side end 22 to adaptively adjust the radial pressure, so that the greater the pressure on the force transmission ring 20, the tighter the bottom fits the self-tightening seal.

[0055] The skeleton 24 is a high-temperature resistant elastic material, used to drive the side end 22 to a certain extent to contract inward and expand outward.

[0056] Furthermore, when the medium temperature rises, the skeleton 24 can still maintain its elasticity, and the drive end 22 automatically adjusts its radial position according to the pressure change: it contracts inward when the pressure increases and expands outward when the pressure decreases, thus maintaining the stability of the sealing surface specific pressure.

[0057] The force transmission ring 20 also includes:

[0058] The groove 25 is formed on the outer sidewall of the two side ends 22;

[0059] The force-bearing block 26 slides within the groove 25, with its top extending to the outside of the force-transmitting ring 20, and is used to transmit medium pressure.

[0060] The sliding block 27 is located in the slide groove 25 and fixedly connected to the side wall of the force-bearing block 26 to prevent the force-bearing block 26 from coming out of the slide groove 25;

[0061] Spring 28 is disposed in slide groove 25, with one end fixedly connected to the inner wall of slide groove 25 and the other end fixedly connected to sliding block 27, and is used to provide elastic force for the movement of force block 26.

[0062] Furthermore, such as Figures 2 to 4 As shown, the downward pressure of the medium acts on the force-bearing block 26, causing the force-bearing block 26 to move downward along the slide groove 25. During this process, the force-bearing block 26 applies force to the side end 22 by contacting the inner wall of the slide groove 25, causing the force transmission ring 20 to move further downward, thereby increasing the clamping force between the bottom sealing ring 30 and the sealing gap.

[0063] The sealing ring 30 includes a force-guiding groove 31 formed in the middle of itself.

[0064] Furthermore, such as Figure 2 As shown, the elastic deformation and surface adhesion of the force-guiding groove 31 form a physical barrier, which, together with the clamping force of the force transmission ring 20, achieves a dual sealing effect of contact sealing and deformation sealing.

[0065] The tight fit between the force-bearing ring 10, the force-transmitting ring 20, the sealing ring 30 and the inner wall of the dynamic seal 40 achieves a sealing effect when the dynamic seal 40 shaft is rotating or stationary.

[0066] Furthermore, in a static state, a stable sealing surface is formed through the pre-tightening force and initial fit between components, preventing media leakage; in a dynamic state, i.e. when the shaft rotates, the elastic adjustment of the force transmission ring 20 and the close following of the sealing ring 30 maintain the fit, avoiding leakage caused by gaps due to relative movement.

[0067] Working process: When this high airtight direct-acting dynamic-fit sealing assembly is working, the medium pressure acts on the force-receiving ring 10, causing it to move downward. The downward pressure protrusion 11 at the bottom of the force-receiving ring 10 is inserted into the force-receiving groove 21 in the middle of the force-transmitting ring 20, pushing the side end 22 of the force-transmitting ring 20 to contract inward under the elastic action of the skeleton 24 to tightly fit the downward pressure protrusion 11. At the same time, the medium pressure drives the spring 28 to compress through the force-receiving block 26 on the outside of the force-transmitting ring 20, and the auxiliary side end 22 increases the sealing surface clamping force. The guide protrusion 23 of the force-transmitting ring 20 pushes the sealing ring 30 to move downward. The guide groove 31 in the middle of the sealing ring 30 is interference-fitted with the motion shaft and deforms to fill the gap to achieve sealing.

[0068] Working principle: The pressure is transmitted by the force ring 10, and the force transmission ring 20 achieves pressure amplification and dynamic compensation through the sliding elastic mechanism composed of the skeleton 24, the slide groove 25, and the spring 28. After deformation, it expands to both sides and tightly fits the inner wall of the dynamic seal 40 to generate additional sealing force. The sealing ring 30 forms a three-stage linkage of contact sealing. Combined with the high temperature resistance elastic recovery characteristics of the skeleton 24 and the synergy of the multi-stage sealing structure, the sealing surface pressing force automatically increases with the increase of the medium pressure, achieving high airtightness in direct-acting fit.

[0069] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A high-airtightness direct-acting dynamic-fit sealing assembly, characterized in that, include: Force-receiving ring (10), force-transmitting ring (20), and sealing ring (30); The force-bearing ring (10) is installed at the top and is used to transmit the medium pressure and move downward; The force transmission ring (20) is installed in the middle to increase the sealing surface clamping force and improve the sealing effect; The sealing ring (30) is installed at the bottom to seal the sealing gap and prevent the medium from leaking from the sealing gap; The dynamic seal (40) includes a mounting base fixedly connected to the outside and a rotating shaft rotatably connected. The dynamic seal (40) is disposed outside the force-receiving ring (10), the force-transmitting ring (20) and the sealing ring (30), together forming a complete high-airtightness braking type mating seal system.

2. The high airtight direct-acting dynamic-fit sealing assembly according to claim 1, characterized in that, The bottom of the force-bearing ring (10) extends downward to form a downward pressing protrusion (11).

3. A high-airtightness direct-acting dynamic-fit sealing assembly according to claim 2, characterized in that, The force transmission ring (20) includes: A force-receiving groove (21) is formed in the middle of the force-transmitting ring (20) and is recessed downward to accommodate the downward pressure protrusion (11); The side end (22) is formed by the force transmission ring (20) extending to both sides; The force-guiding protrusion (23) is formed by the force-transmitting ring (20) extending downward to the bottom; The skeleton (24) is disposed inside the force transmission ring (20) and has a certain elasticity, which is used to provide the force transmission ring (20) with the elasticity to return to its original state.

4. A high-airtightness direct-acting dynamic-fit sealing assembly according to claim 3, characterized in that, The skeleton (24) is a high-temperature resistant elastic material, which is used to drive the side end (22) to contract inward and expand outward to a certain extent.

5. A high-airtightness direct-acting dynamic-fit sealing assembly according to claim 3, characterized in that, The force transmission ring (20) also includes: A groove (25) is provided on the outer sidewall of the two side ends (22); The force-bearing block (26) slides in the groove (25) and extends to the outside of the force-transmitting ring (20) at the top, for transmitting medium pressure; A sliding block (27) is located in the groove (25) and fixedly connected to the side wall of the force-bearing block (26) to prevent the force-bearing block (26) from coming out of the groove (25); A spring (28) is disposed in the groove (25), with one end fixedly connected to the inner wall of the groove (25) and the other end fixedly connected to the sliding block (27), for providing elastic force for the movement of the force block (26).

6. A high-airtightness direct-acting dynamic-fit sealing assembly according to claim 1, characterized in that, The sealing ring (30) includes a force-guiding groove (31) formed in the middle of itself.

7. A high-airtightness direct-acting dynamic-fit sealing assembly according to claim 1, characterized in that, By tightly fitting the force-receiving ring (10), the force-transmitting ring (20), the sealing ring (30) with the inner wall of the dynamic seal (40), a sealing effect is achieved when the dynamic seal (40) shaft rotates or remains stationary.

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