An integrally molded rubber-metal damper assembly

Abstract

The utility model provides a kind of integrated forming rubber metal air door assembly, is installed on the air door frame of pipeline system, including left air door, right air door and center fixed strip;Left air door and right air door include semicircular metal fan plate and the first rubber layer attached to metal fan plate one side and its periphery;Center fixed strip includes rectangular metal strip and the second rubber layer attached to metal strip one side and its periphery;Two mounting holes are provided on metal strip;First rubber layer and second rubber layer are connected by the connecting rubber layer being set along the width direction of air door assembly, the thickness of connecting rubber layer is less than the thickness of first rubber layer and second rubber layer, connecting rubber layer is between left and right two metal fan plate and metal strip and constitutes the connecting portion with axial flexibility;First rubber layer includes rubber plane pasted on metal fan plate and arc sealing surface located at its outer edge.The utility model greatly improves the sealing reliability and service life of air door assembly.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline sealing and flow control technology, specifically relating to an integrated molded rubber-metal damper assembly. Background Technology

[0002] In high-pressure gas pipelines, spacecraft propulsion systems, and pipeline equipment requiring precise airflow regulation, damper or valve structures composed of metal components and elastic sealing elements are commonly used to simultaneously meet the requirements of pressure bearing, opening and closing, and sealing within a limited installation space. The metal components provide the necessary rigidity and shape stability, resisting deformation under high gas pressure within the pipeline; elastic materials such as rubber compensate for the assembly gap between the metal components and the frame through their own compression deformation, forming a contact surface that achieves functions such as sealing, buffering, and vibration damping. Therefore, rubber-metal combined damper assemblies are gradually becoming common components in such pipeline systems.

[0003] Existing rubber-metal damper assemblies mostly employ a metal frame with an outer rubber layer. This involves first fabricating the metal fan plate, metal connecting strips, or door panel, and then fixing the rubber seals to the surface or edges of the metal components through bonding, wrapping, or partial vulcanization. While this approach balances strength and sealing, the process is often done in steps, with metal and rubber components fabricated and assembled separately. Assembly accuracy and bonding reliability are significantly affected by the manufacturing process. Furthermore, mounting holes and process holes are often required for positioning and fixation, making the structure less than simplified. For dampers that require frequent opening and closing or operate under high pressure, insufficient bonding strength between the rubber layer and the metal components can lead to problems such as edge warping, delamination, and wear on the sealing surface after prolonged use, affecting the overall sealing performance of the pipeline.

[0004] Furthermore, some existing products often employ hinges, pivots, or segmented assembly to close two dampers or door panels within the frame. These metal rotating connections inherently have gaps, requiring additional rubber strips, sealing rings, or fillers for compensation. This results in a relatively complex structure, and the molding process necessitates multiple clamping or vulcanization cycles. If the piping system operates at high pressure or requires low leakage rates, this multi-interface, multi-assembly structure can easily create potential leak points at the connections, limiting sealing reliability and increasing assembly and maintenance workload. Therefore, the industry still needs to achieve greater integration of metal load-bearing components and rubber seals in terms of shape and assembly, without altering the existing piping layout. This would reduce assembly interfaces, lower process complexity, and maintain high sealing stability. Summary of the Invention

[0005] This utility model provides an integrated molded rubber-metal damper assembly to solve the problems in the prior art where the damper body is assembled from multiple metal parts and scattered rubber parts, resulting in multiple interfaces, easy leakage gaps at the joints, and an overall non-compact structure.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: An integrated molded rubber-metal damper assembly is installed on the damper frame of a pipeline system, including a left damper, a right damper, and a central fixing strip. The left and right dampers each include a semi-circular metal fan plate and a first rubber layer attached to one side and around the metal fan plate. The central fixing strip includes a rectangular metal strip and a second rubber layer attached to one side and around the metal strip. The metal strip has two mounting holes. The first rubber layer and the second rubber layer are connected by a connecting rubber layer arranged along the width direction of the damper assembly. The thickness of the connecting rubber layer is less than the thickness of the first rubber layer and the second rubber layer. The connecting rubber layer forms an axially flexible connection between the left and right metal fan plates and the metal strip. The first rubber layer includes a rubber plane attached to the metal fan plate and an arc-shaped sealing surface located at its outer edge.

[0007] Furthermore, the arc-shaped sealing surface is continuously arranged along the arc edge of the metal fan plate, and forms a smoothly transitioning arc surface structure with the rubber plane.

[0008] Furthermore, the two mounting holes are spaced apart along the length of the metal strip, and the mounting holes are countersunk holes.

[0009] Furthermore, the portion where the second rubber layer contacts the connecting rubber layer is provided with a thinning groove extending along the length direction of the damper assembly.

[0010] Furthermore, the thinning groove is a rectangular or circular arc-shaped groove.

[0011] Furthermore, each of the metal fan plates is provided with two positioning holes.

[0012] Furthermore, the outer diameter of the metal fan plate is 60mm-80mm, the length is 65mm-75mm, and the thickness is 2mm-3mm; the length of the metal strip is 40mm-55mm, the width is 6mm-10mm, and the thickness is 1mm-2mm; the diameter of the positioning hole is 2mm-4mm, and the depth is 1mm-3mm; the mounting hole includes a countersunk hole structure composed of a large hole section and a small hole section, the diameter of the large hole section is 5mm-6mm, and the depth is 0.5mm-1.5mm, and the diameter of the small hole section is 3mm-4mm, and the depth is 1mm-2mm; the thickness of the rubber surface is 0.4mm-0.8mm; the radius of the arc of the arc-shaped sealing surface is 0.3mm-0.6mm, and the height is 0.4mm-0.8mm; the thickness of the second rubber layer is 0.8mm-1.2mm; and the width of the connecting rubber layer is 1mm-2mm, and the thickness is 0.8mm-1.2mm.

[0013] Furthermore, the metal fan plate and metal strip are made of carbon steel.

[0014] Furthermore, the first rubber layer, the second rubber layer, and the connecting rubber layer are integrally formed by hot-pressing and vulcanizing rubber materials in a mold.

[0015] Furthermore, the rubber material has a hardness level of 30-80 degrees, and the carbon steel material has a hardness level of 20 degrees.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model embodiment simultaneously encapsulates the left and right air doors and the central fixing strip in the same mold, thus combining the metal and rubber parts into a single integrated structure. This avoids the problems of multiple processes and unstable interfaces caused by separately processing the metal door leaf and sealing rubber and then gluing or assembling them later, as well as the existing technology. The overall molding quality is higher, the rubber is less likely to fall off, and the service life is longer.

[0017] In this embodiment of the invention, a connecting rubber layer with a reduced thickness is provided between the metal strip and the metal fan plates on both sides. This part forms a flexible transition zone that can be bent, so that the metal fan plates on both sides can open and close without the need for traditional metal hinge or riveted shaft structures. This reduces rigid gaps and potential leakage paths at the hinges, and makes it easier to maintain continuous overall sealing.

[0018] In this embodiment of the utility model, an arc-shaped sealing surface that is consistent with the semi-circular edge is integrally formed on the rubber layer on the outer side of the metal fan plate. The arc-shaped sealing surface and the rubber plane have a smooth transition without steps or splices. When closed, it can form a uniform contact with the corresponding door frame sealing surface, with a clear sealing contour. A stable sealing effect can be obtained without the need for additional sealing strips, and it is also beneficial for subsequent cleaning and maintenance.

[0019] The embodiment of this utility model features a rigid frame, flexible connection, and overall sealing in its structure, which is beneficial for mass production and also facilitates the control of product consistency.

[0020] Of course, implementing the various technical solutions of this utility model does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the damper assembly according to an embodiment of the present utility model; Figure 2 yes Figure 1 AA side sectional view; In the diagram, 1-left damper, 2-right damper, 3-center fixing strip, 4-metal fan plate, 5-first rubber layer, 6-metal strip, 7-second rubber layer, 8-positioning hole, 9-mounting hole, 10-connecting rubber layer, 11-rubber plane, 12-arc sealing surface, 13-thinning groove. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0027] Example: like Figure 1 and Figure 2 As shown, the integrated molded rubber-metal damper assembly of this utility model is installed on the damper frame of the pipeline system. The whole assembly is formed by a left damper 1, a right damper 2, and a central fixing strip 3 located in the middle. The left damper 1 and the right damper 2 have the same structure, both including a semi-circular metal fan plate 4 and a first rubber layer 5 attached to one side and around the metal fan plate 4; the central fixing strip 3 includes a rectangular metal strip 6 and a second rubber layer 7 attached to one side and around the metal strip 6. The three are connected by a connecting rubber layer 10 in the middle.

[0028] In terms of specific dimensions, the outer diameter of the metal fan plate 4 is 71mm, the length along the straight edge is 67mm, and the thickness is 2.5mm, providing necessary rigidity and forming reference. Each metal fan plate 4 has two positioning holes 8, with an inner diameter of Φ3mm and a depth of 2mm, used to position the metal fan plate 4 during mold forming or component clamping, ensuring the symmetry and positional accuracy of the damper assembly after forming. The metal strip 6 is 49mm long, 7mm wide, and 1.5mm thick, matching the installation dimensions of the door frame. The metal strip 6 has two mounting holes 9 spaced apart along its length. Each mounting hole 9 is a countersunk structure, coaxially composed of a first section hole with an inner diameter of Φ5.5mm and a depth of 1mm, and a second section hole with an inner diameter of Φ3.4mm and a depth of 1.5mm. This allows for countersunk installation of the fixing screws, preventing them from protruding from the rubber surface and facilitating flush installation of the entire damper assembly with the pipeline door frame.

[0029] The first rubber layer 5 is applied to the front and all sides of the metal panel 4. The thickness of the rubber plane 11 is 0.5 mm, which is used to cover the metal surface and serve as a basic sealing surface. An arc-shaped sealing surface 12 is integrally formed on the outer arc edge of the metal panel 4. The arc radius of the arc-shaped sealing surface 12 is 0.4 mm and the height is 0.6 mm. It is continuously set along the arc edge of the metal panel 4 and forms a smooth arc structure with the rubber plane 11. When closed, it can form a uniform annular sealing line with the door frame, improving the continuity of the seal. The second rubber layer 7 on the outside of the central fixing strip 3 has a covering thickness of 1 mm, which is consistent with the covering thickness of the two door panels, making the outer contour of the component smooth.

[0030] The left damper 1, right damper 2, and central fixing strip 3 are connected by a connecting rubber layer 10 arranged along the width direction of the damper assembly, such as... Figure 2 As shown, the connecting rubber layer 10 is strip-shaped, with a width of 1.5 mm and a thickness of 1 mm. Its thickness is less than the covering thickness of the first rubber layer 5 and the second rubber layer 7. It forms an axially flexible connection between the two metal fan plates 4 on the left and right sides and the middle metal strip 6. This allows the left and right dampers to open and close slightly or move around this connection when installed on the door frame and in contact with the sealing surface, thereby eliminating local gaps caused by installation deviations. To further reduce the rubber stiffness at this location, a thinning groove 13 extending along the length of the damper assembly is provided at the junction of the second rubber layer 7 and the connecting rubber layer 10. The thinning groove 13 can be a rectangular or arc-shaped groove with its bottom close to the connecting rubber layer 10, making the rubber layer thickness at this location less than that of the surrounding area. This facilitates bending and transition at this location without disrupting the continuity of the overall covering.

[0031] In this embodiment, both the metal fan plate 4 and the metal strip 6 are made of carbon steel with a hardness of approximately 20 degrees, which meets the load-bearing requirements of conventional pipeline dampers. The first rubber layer 5, the second rubber layer 7, and the connecting rubber layer 10 are made of rubber with a hardness of 30-80 degrees. They are formed by hot-pressing and vulcanizing in a mold in one step, making the interface between the metal parts and the rubber coating continuous and firm, eliminating the need for post-gluing and achieving a complete sealing profile. Through the above-mentioned dimensional and structural matching, this integrated molded rubber-metal damper assembly, while maintaining the strength of the metal frame, introduces a flexible transition zone composed of the connecting rubber layer 10 and the thinning groove 13, replacing the traditional metal hinge or pin rotation structure. This avoids the formation of rigid gaps at the hinges, structurally reducing possible leakage points and simultaneously improving overall sealing performance and assembly adaptability.

[0032] This utility model addresses the piping sealing and flow regulation applications in aerospace equipment such as civilian satellites and launch vehicles. It employs a one-piece molded structure with a carbon steel metal matrix and rubber coating, manufactured using a combination of machining and in-mold hot vulcanization processes. This structure combines the pressure-bearing and shape stability of metal components with the adhesion and cushioning properties of a rubber layer. It allows for the opening, closing, and small-range adjustment of the channel under high-pressure gas conditions. The continuous sealing surface and minimal leakage channels meet the reliability and lifespan requirements of aerospace piping, while also facilitating mass production and maintenance / replacement.

[0033] The following table shows the performance characteristics of this utility model: Table 1 Product Performance Serial Number Experimental Project standard 1 High pressure sealing test <![CDATA[Mount the rubber metal damper assembly into the sealed pipeline sealing tooling, the surface of the damper assembly is subjected to 45 Mpa nitrogen pressure, and the leakage rate is no more than 1×10 -5 Pa·m 3 / s.]]> The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. An integrated molded rubber-metal damper assembly, installed on the damper frame of a pipeline system, characterized in that, The assembly includes a left damper (1), a right damper (2), and a central fixing strip (3); the left damper (1) and the right damper (2) each include a semi-circular metal fan plate (4) and a first rubber layer (5) attached to one side and around the metal fan plate (4); the central fixing strip (3) includes a rectangular metal strip (6) and a second rubber layer (7) attached to one side and around the metal strip (6); the metal strip (6) has two mounting holes (9); the first rubber layer (5) and the second rubber layer (7) are connected by a connecting rubber layer (10) arranged along the width direction of the damper assembly, the thickness of the connecting rubber layer (10) is less than the thickness of the first rubber layer (5) and the second rubber layer (7), and the connecting rubber layer (10) forms an axially flexible connection between the left and right metal fan plates (4) and the metal strip (6); the first rubber layer (5) includes a rubber plane (11) attached to the metal fan plate (4) and an arc-shaped sealing surface (12) located at its outer edge.

2. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, The arc-shaped sealing surface (12) is continuously arranged along the arc edge of the metal fan plate (4) and forms a smooth transition arc surface structure with the rubber plane (11).

3. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, The two mounting holes (9) are spaced apart along the length of the metal strip (6), and the mounting holes (9) are countersunk holes.

4. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, The portion of the second rubber layer (7) that is in contact with the connecting rubber layer (10) is provided with a thinning groove that extends along the length of the damper assembly.

5. The integrated molded rubber-metal damper assembly according to claim 4, characterized in that, The thinning groove is a rectangular or circular arc-shaped groove.

6. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, Each of the metal fan plates (4) is provided with two positioning holes (8).

7. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, The outer diameter of the metal fan plate (4) is 60mm-80mm, and the length is 65mm-75mm. mm, thickness is 2mm-3mm; the length of the metal strip (6) is 40mm-55mm, the width is 6mm-10mm, and the thickness is 1mm-2mm; the diameter of the positioning hole (8) is 2mm-4mm, and the depth is 1mm-3mm; the mounting hole (9) includes a countersunk hole structure composed of a large hole section and a small hole section, the diameter of the large hole section is 5mm-6mm, the depth is 0.5mm-1.5mm, the diameter of the small hole section is 3mm-4mm, and the depth is 1mm-2mm; the thickness of the rubber plane (11) is 0.4mm-0.8mm; the radius of the arc surface of the arc sealing surface (12) is 0.3mm-0.6mm, and the height is 0.4mm-0.8mm; the thickness of the second rubber layer (7) is 0.8mm-1.2mm; the width of the connecting rubber layer (10) is 1mm-2mm, and the thickness is 0.8mm-1.2mm.

8. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, The metal fan plate (4) and metal strip (6) are made of carbon steel.

9. The integrated molded rubber-metal damper assembly according to claim 1, characterized in that, The first rubber layer (5), the second rubber layer (7) and the connecting rubber layer (10) are integrally formed by hot pressing and vulcanizing rubber materials in a mold.

10. The integrated molded rubber-metal damper assembly according to claim 9, characterized in that, The rubber material has a hardness level of 30-80 degrees, and the carbon steel material has a hardness level of 20 degrees.

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