A long service life high-strength pneumatic rubber seal ring

Abstract

The utility model provides a long life's high strength pneumatic rubber seal ring, including rubber seal ring body, rubber seal ring body inside is connected with elastic component through insert injection moulding process fixedly, and elastic component includes torsion frame, elastic colloid and annular elastic sheet, and elastic colloid is connected torsion frame and annular elastic sheet through insert injection moulding process fixedly, the utility model discloses rubber seal ring body inside is connected with elastic component through insert injection moulding process fixedly, and elastic component includes torsion frame, elastic colloid and annular elastic sheet, and elastic colloid is connected torsion frame and annular elastic sheet through insert injection moulding process fixedly, and torsion frame improves the anti deformation performance of rubber seal ring body, improves the elasticity of rubber seal ring body through elastic colloid and annular elastic sheet cooperation, and then improves the extrusion sealing property of rubber seal ring body.

Description

Technical Field

[0001] This utility model belongs to the field of sealing ring technology, specifically relating to a high-strength pneumatic rubber sealing ring with a long service life. Background Technology

[0002] In China's standard classification system, pneumatic seals are closely related to multiple fields, including aviation instruments, seals and sealing devices, and hydraulic and pneumatic devices. The materials used for pneumatic seals typically involve rubber and plastics. A rubber seal is an annular cover composed of one or more parts, usually fixed to one race or washer of a bearing and contacting another race or washer, or forming a narrow labyrinthine gap. Its main function is to prevent lubricating oil leakage and to prevent the intrusion of external impurities. In terms of cross-sectional shape, rubber seals come in various types, including circular, rectangular, square, trapezoidal, D-type, C-type, V-type, and M-type.

[0003] However, existing rubber sealing ring technology still has some shortcomings in practical applications. Current rubber sealing rings are relatively weak and easily damaged by deformation during compression sealing operations. Furthermore, their limited range of deformation results in less than ideal sealing performance and lower overall practicality.

[0004] Chinese utility model patent CN214425094U discloses a high-strength pneumatic rubber sealing ring with a long service life. It includes a rubber sealing ring body and a buffer groove. The buffer groove is located inside the rubber sealing ring body, and a horizontal spring is fixedly connected inside the buffer groove. This utility model, under the action of the deformation groove, facilitates elastic deformation of the rubber sealing ring body in the horizontal direction, effectively increasing the horizontal extension deformation range of the rubber sealing ring body. The deformation grooves, all with semi-circular cross-sectional shapes, are not easily torn or damaged during deformation. A first spring sheet and a second spring sheet are respectively fixedly sleeved inside the first and second recesses of this utility model. Under the action of the first spring sheet, the second spring sheet, the first recess, and the second recess, the rubber sealing ring body can easily undergo elastic deformation in the vertical direction, effectively increasing the vertical extension deformation range of the rubber sealing ring body, making it less prone to deformation and damage during vertical deformation. However, its structure is complex and its production cost is high. Utility Model Content

[0005] The purpose of this invention is to provide a high-strength pneumatic rubber sealing ring with a long service life to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-strength pneumatic rubber sealing ring with a long service life, comprising a rubber sealing ring body, wherein an elastic component is fixedly connected inside the rubber sealing ring body by an insert injection molding process, the elastic component comprising a torsion frame, an elastic colloid and an annular spring sheet, wherein the elastic colloid is fixedly connected to the torsion frame and the annular spring sheet by an insert injection molding process.

[0007] Preferably, the torsion frame includes a first plate and a second plate, wherein the first plate is fixedly connected to the second plate by a connecting rod.

[0008] Preferably, the first plate, the second plate, and the connecting rod are all made of stainless steel and are fixedly connected by laser welding.

[0009] Preferably, the annular spring is made of high-elasticity steel.

[0010] Preferably, the elastic colloid is made of silicone rubber.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The rubber sealing ring of this invention has an elastic component fixedly connected inside by an insert injection molding process. The elastic component includes a torsion frame, an elastic colloid, and an annular spring. The elastic colloid is fixedly connected to the torsion frame and the annular spring by the insert injection molding process. The torsion frame improves the deformation resistance of the rubber sealing ring body, and the elastic colloid and the annular spring work together to improve the elasticity of the rubber sealing ring body, thereby improving the compression sealing performance of the rubber sealing ring body. Attached Figure Description

[0013] Figure 1 This is a structural view of the present invention.

[0014] Figure 2 This is a layered sectional view of the present invention.

[0015] Figure 3 This is a cross-sectional structural view of the present invention.

[0016] Figure 4 This is a structural view of the torsion frame of this utility model.

[0017] The diagram is labeled as follows: 1. Rubber sealing ring body; 2. Elastic component; 3. Torque frame; 4. Elastic colloid; 5. Annular spring sheet; 6. First plate; 7. Second plate; 8. Connecting rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1:

[0020] This utility model provides a high-strength pneumatic rubber sealing ring with a long service life, comprising a rubber sealing ring body 1. An elastic component 2 is fixedly connected inside the rubber sealing ring body 1 via an insert injection molding process. The elastic component 2 includes a torsion frame 3, an elastic colloid 4, and an annular spring 5. The elastic colloid 4 is fixedly connected to the torsion frame 3 and the annular spring 5 via an insert injection molding process. The torsion frame 3 includes a first plate 6 and a second plate 7. The first plate 6 is fixedly connected to the second plate 7 via a connecting rod 8. The first plate 6, the second plate 7, and the connecting rod 8 are all made of stainless steel and are fixedly connected via laser welding. The annular spring 5 is made of high-elasticity steel. The elastic colloid 4 is made of silicone rubber.

[0021] Through the above technical solution, the rubber sealing ring body 1 of this utility model has an elastic component 2 fixedly connected inside by an insert injection molding process. The elastic component 2 includes a torsion frame 3, an elastic colloid 4, and an annular spring sheet 5. The elastic colloid 4 is fixedly connected to the torsion frame 3 and the annular spring sheet 5 by an insert injection molding process. The torsion frame 3 improves the deformation resistance of the rubber sealing ring body 1, and the elasticity of the rubber sealing ring body 1 is improved by the cooperation of the elastic colloid 4 and the annular spring sheet 5, thereby improving the compression sealing performance of the rubber sealing ring body 1.

[0022] Example 2:

[0023] In this embodiment, the rubber sealing ring body 1 adopts a ring structure design, and an elastic component 2 is integrated and fixed inside it through an insert injection molding process. The elastic component 2 consists of three key parts: a torsion frame 3, an elastic colloid 4, and an annular spring sheet 5. The torsion frame 3 is made of metal and has a stable geometry, providing anti-torsional support to the rubber sealing ring body 1 through its structural characteristics. The elastic colloid 4 is made of highly elastic rubber material, and the torsion frame 3 and the annular spring sheet 5 are firmly bonded together through an insert injection molding process to form an integral structure.

[0024] In its implementation, the torsion frame 3 is a three-dimensional frame structure containing multiple interconnected support arms. These support arms are arranged at a specific angle, enabling a uniform torsional distribution when subjected to external forces. This structural design of the torsion frame 3 allows it to effectively resist various deformation forces generated by the sealing ring during use.

[0025] The elastic colloid 4 completely encapsulates the main part of the torsion frame 3 and forms a connection interface with the annular spring sheet 5 on its outer side. The elastic colloid 4 has a specific hardness range and elastic modulus, enabling it to produce recoverable elastic deformation under stress. Its molecular structure is specially designed to exhibit excellent fatigue resistance, allowing it to withstand repeated compression and rebound processes without permanent deformation or cracking. The bonding surfaces of the elastic colloid 4 with the torsion frame 3 and the annular spring sheet 5 are specially treated to ensure the interfacial bonding strength among the three components.

[0026] The annular spring piece 5 is made of an elastic metal material with memory properties, exhibiting a continuous annular structure. Its cross-sectional shape is optimized to provide elastic support in both the radial and axial directions. The inner side of the annular spring piece 5 is tightly bonded to the elastic colloid 4, while the outer side is fused to the main body of the rubber sealing ring 1. The special shape of the annular spring piece 5 enables it to generate a uniform rebound force when subjected to compressive force, while maintaining structural stability.

[0027] When the sealing ring is subjected to external force, the components of the elastic assembly 2 work together. The torsion frame 3 first resists the main deformation force, preventing excessive torsional deformation of the sealing ring. At the same time, the elastic colloid 4 undergoes elastic deformation, absorbing some of the impact energy. The annular spring 5 provides continuous rebound force, ensuring that the sealing ring maintains good sealing contact. This three-component synergistic design allows the sealing ring to maintain structural integrity even under high pressure, while also possessing excellent resilience.

[0028] In the manufacturing process, the pre-fabricated torsion frame 3 and annular spring 5 are first positioned in the mold according to the design requirements. Then, the elastic colloid 4 material is injected into the mold through an insert injection molding process, so that it completely wraps the torsion frame 3 and forms a firm bond with the annular spring 5. Finally, in a secondary injection molding process, the entire elastic component 2 is combined with the rubber sealing ring body 1 to form the final product. This manufacturing process ensures a tight fit between the components and the uniformity of the overall structure.

[0029] The sealing ring of this embodiment is particularly suitable for high-pressure pneumatic systems, maintaining stable performance during frequent compression-rebound cycles. The unique design of the elastic component 2 extends the sealing ring's service life while maintaining excellent sealing performance. In practical applications, this sealing ring can adapt to a wider range of operating pressures and maintain good sealing performance even under extreme conditions.

[0030] Example 3:

[0031] In this embodiment, an elastic component 2 is fixedly connected inside the rubber sealing ring body 1 via an insert injection molding process. The elastic component 2 includes a torsion frame 3, an elastic colloid 4, and an annular spring piece 5. The elastic colloid 4 fixes the torsion frame 3 and the annular spring piece 5 together via an insert injection molding process. The torsion frame 3, as the core support structure of the entire elastic component 2, is specially designed to improve the overall deformation resistance of the sealing ring.

[0032] The torsion frame 3 comprises a first plate 6 and a second plate 7, both of which are annular structures arranged parallel to each other vertically. The first plate 6 and the second plate 7 are fixedly connected by multiple connecting rods 8, forming a stable frame structure. This design of annular parallel plates and connecting rods 8 ensures that the torsion frame 3 maintains structural stability when subjected to radial and axial pressure. The annular design of the first plate 6 and the second plate 7 ensures a good fit with the rubber sealing ring body 1, while the even distribution of the multiple connecting rods 8 ensures uniform force distribution.

[0033] During assembly, the torsion frame 3 and the annular spring 5 are first pre-assembled using the elastic colloid 4. Then, the entire elastic component 2 is bonded to the rubber sealing ring body 1 using an insert injection molding process. The elastic colloid 4 acts as a buffer and connector between the torsion frame 3 and the annular spring 5, ensuring the integrity of the structure while providing the necessary space for elastic deformation. The annular spring 5 mainly undertakes the radial elastic recovery function and works in conjunction with the torsion frame 3.

[0034] When the sealing ring is subjected to external pressure, the first plate 6 and the second plate 7 of the torsion frame 3 transmit and disperse the stress through the connecting rod 8, preventing damage caused by local stress concentration. Simultaneously, the elastic colloid 4 allows the annular spring 5 to undergo appropriate elastic deformation, ensuring a tight seal between the sealing surfaces. After the pressure is released, the annular spring 5 quickly returns to its original shape with the assistance of the elastic colloid 4, maintaining the sealing ring's good sealing performance.

[0035] The sealing ring of this embodiment is particularly suitable for pneumatic systems that need to withstand periodic pressure changes. The parallel plate structure design of the torsion frame 3 effectively improves the compressive strength of the sealing ring, while the cooperation between the elastic colloid 4 and the annular spring 5 ensures good sealing performance and a long service life. The overall structural design is simple and efficient, reducing the number of parts and lowering production costs compared to existing technologies.

[0036] In practical applications, this sealing ring can withstand high working pressure without permanent deformation. The connecting rod 8 structure of the torsion frame 3 ensures that the sealing ring maintains its shape stability under axial pressure, preventing uneven wear on the sealing surface. Simultaneously, the presence of the elastic colloid 4 allows the sealing ring to accommodate certain installation deviations during installation, improving assembly convenience.

[0037] Example 4:

[0038] In this embodiment, the rubber sealing ring body 1 adopts a ring structure design, and an elastic component 2 is fixedly connected inside it through an insert injection molding process. The elastic component 2 includes three main parts: a torsion frame 3, an elastic colloid 4, and an annular spring piece 5. The elastic colloid 4 firmly connects the torsion frame 3 and the annular spring piece 5 together through an insert injection molding process.

[0039] The torsion frame 3, as the core support structure of the elastic component 2, consists of a first plate 6, a second plate 7, and multiple connecting rods 8. Both the first plate 6 and the second plate 7 are designed as annular stainless steel plates, arranged parallel to each other vertically, and connected by multiple evenly distributed and fixed stainless steel connecting rods 8. These stainless steel connecting rods 8 form a robust connection structure with the first plate 6 and the second plate 7 through laser welding, ensuring the overall strength and stability of the torsion frame 3. The use of laser welding technology results in higher weld strength and a smaller heat-affected zone at the connection points, effectively avoiding deformation problems that may occur with traditional welding.

[0040] The elastic colloid 4 is made of highly elastic rubber material and completely encapsulates the torsion frame 3 through an insert injection molding process, forming an integrated structure with the annular spring 5. The elastic colloid 4 acts as a buffer and energy storage element between the torsion frame 3 and the annular spring 5. When the sealing ring is subjected to external pressure, the elastic colloid 4 can effectively absorb and disperse stress, preventing localized damage caused by stress concentration. Simultaneously, the tight bond between the elastic colloid 4 and the torsion frame 3 ensures uniform force transmission and improves the overall deformation resistance of the sealing ring.

[0041] The annular spring 5 is located outside the elastic colloid 4 and is also firmly connected to the elastic colloid 4 through an insert injection molding process. The annular spring 5 adopts a specially designed arc-shaped structure, which can produce uniform elastic deformation when subjected to external force. It works in conjunction with the elastic colloid 4 to improve the sealing performance and service life of the sealing ring. When the external force is removed, the elastic restoring force of the annular spring 5 and the elastic colloid 4 allows the sealing ring to quickly return to its original shape, maintaining a good sealing effect.

[0042] The working principle of this sealing ring is as follows: When the sealing ring is subjected to axial pressure, the first plate 6 and the second plate 7 of the torsion frame 3 form a stable support structure through the stainless steel connecting rod 8, effectively resisting deformation. Simultaneously, the elastic colloid 4 undergoes compression deformation, storing elastic potential energy; the annular spring 5 undergoes radial expansion, enhancing the sealing effect. When the pressure is released, the elastic potential energy stored in the elastic colloid 4 and the annular spring 5 is released, allowing the sealing ring to return to its original shape. This structural design enables the sealing ring to maintain high strength while possessing excellent elastic recovery capability and a long service life.

[0043] The selection of stainless steel and the application of laser welding technology ensure that the torsion frame 3 will not rust or loosen during long-term use. The annular design of the first plate 6 and the second plate 7, along with the even distribution of multiple connecting rods 8, allows the torsion frame 3 to evenly bear pressure from all directions, avoiding localized stress concentration. This structural design is particularly suitable for applications requiring high pressure resistance and airtightness, such as sealing applications in aerospace instruments, hydraulic and pneumatic devices, and other fields.

[0044] Example 5:

[0045] In this embodiment, an elastic component 2 is fixedly connected inside the rubber sealing ring body 1 via an insert injection molding process. The elastic component 2 consists of three parts: a torsion frame 3, an elastic colloid 4, and an annular spring piece 5, wherein the annular spring piece 5 is made of high-elasticity steel. This structural design significantly improves the overall performance and service life of the sealing ring.

[0046] In practical implementation, the rubber sealing ring body 1 is made of conventional rubber material, and the elastic component 2 is firmly fixed in its internal structure through an insert injection molding process. The torsion frame 3 in the elastic component 2 mainly plays a supporting and anti-deformation role, effectively resisting the deformation of the sealing ring caused by external pressure. The elastic colloid 4 serves as a connecting medium, and the torsion frame 3 and the annular spring piece 5 are tightly connected together through the insert injection molding process to form a complete elastic system.

[0047] The annular spring 5 is made of high-elasticity steel, a material with excellent elastic recovery and fatigue resistance. High-elasticity steel has a high yield strength, maintaining good elasticity during repeated deformation and is not prone to permanent deformation. When the sealing ring is subjected to external pressure, the annular spring 5 provides stable elastic support, working in conjunction with the elastic colloid 4 to ensure that the sealing ring maintains good sealing performance under pressure.

[0048] In actual operation, when the sealing ring is subjected to pneumatic pressure, the rubber sealing ring body 1 will undergo a certain deformation. At this time, the internal elastic component 2 begins to function. The torsion frame 3 provides the main anti-deformation support to prevent the sealing ring from being excessively deformed; the elastic colloid 4 absorbs some of the deformation energy through its elastic properties; and the annular spring 5 made of high-elasticity steel provides continuous elastic restoring force, ensuring that the sealing ring can quickly return to its original shape after the pressure is removed.

[0049] This structural design is particularly suitable for pneumatic sealing applications that require frequent pressure changes. The addition of the high-elasticity steel annular spring 5 ensures that the sealing ring maintains stable elasticity during long-term use, effectively extending its service life. Furthermore, due to the excellent corrosion resistance of high-elasticity steel, the annular spring 5 maintains good working condition even in harsh working environments, and its sealing performance is not affected by corrosion.

[0050] In terms of manufacturing process, an insert injection molding process is used to fix the elastic component 2 inside the rubber sealing ring body 1. This process ensures a firm bond between the elastic component 2 and the rubber material, preventing delamination or separation during use. The high-elasticity steel ring-shaped spring sheet 5 can form a good bonding interface with the rubber material during injection molding, ensuring the integrity and reliability of the overall structure.

[0051] Example 6:

[0052] In this embodiment, the rubber sealing ring body 1 is fixedly connected to the elastic component 2 through an insert injection molding process. The elastic component 2 includes a torsion frame 3, an elastic colloid 4, and an annular spring sheet 5. The elastic colloid 4 is fixedly connected to the torsion frame 3 and the annular spring sheet 5 through an insert injection molding process. The material of the elastic colloid 4 is silicone rubber.

[0053] The rubber sealing ring body 1 adopts a ring structure design, and the elastic component 2 is tightly bonded to the rubber material inside through an insert injection molding process. The elastic component 2 consists of three main parts: a torsion frame 3, a silicone rubber elastic body 4, and an annular spring piece 5. The torsion frame 3 is made of metal material and has a specific geometry, which can effectively resist deformation caused by external pressure. The silicone rubber elastic body 4 is encapsulated around the torsion frame 3 through an injection molding process, and at the same time forms a firm connection with the annular spring piece 5.

[0054] The silicone rubber elastic colloid 4 possesses excellent elasticity and aging resistance, maintaining stable physical properties over a wide temperature range. When the sealing ring is subjected to axial pressure, the silicone rubber elastic colloid 4 first undergoes elastic deformation, absorbing some of the pressure. As the pressure increases, the annular spring 5 begins to function, providing additional elastic support. The torsion cage 3, through its special structural design, limits excessive deformation of the sealing ring, preventing structural damage.

[0055] During the operation of the sealing ring, the silicone rubber elastic colloid 4 and the annular spring 5 work together to form a multi-stage elastic response mechanism. Under initial pressure, the elastic deformation of the silicone rubber provides the first stage of sealing effect; as the pressure increases, the elastic deformation of the annular spring 5 provides the second stage of support; under extreme pressure, the structural strength of the torsion frame 3 ensures that the sealing ring will not undergo permanent deformation. This multi-stage elastic response mechanism significantly improves the service life and sealing reliability of the sealing ring.

[0056] The unique molecular structure of silicone rubber gives it excellent heat resistance and chemical corrosion resistance, enabling it to adapt to various harsh working environments. Simultaneously, the bonding strength between silicone rubber and metal components (torsion frame 3 and annular spring 5) is high, preventing delamination or detachment during long-term use. The design of the annular spring 5 takes stress distribution into account, evenly dispersing external pressure and avoiding premature failure caused by localized stress concentration.

[0057] This sealing ring is particularly suitable for pneumatic systems that require withstanding periodic pressure changes. When pressure fluctuates, the rapid rebound characteristics of the silicone rubber elastic colloid 4 allow for timely adjustment of the sealing state, maintaining a stable sealing effect. The rigid support of the torsion frame 3 ensures that the sealing ring will not deform excessively under high pressure conditions, maintaining its structural integrity. This combined design gives the sealing ring both sufficient elasticity to adapt to minor unevenness on the working surface and sufficient strength to withstand high-pressure environments.

[0058] In practical applications, this sealing ring effectively prevents gas leakage and resists the intrusion of external contaminants. The use of silicone rubber significantly improves the sealing ring's aging resistance and extends its service life in harsh environments such as high temperature and high humidity. The innovative design of the elastic component 2 solves the problem of traditional sealing rings being prone to deformation and damage under high pressure, achieving better sealing performance and a longer service life.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A high-strength pneumatic rubber seal with a long service life, comprising a rubber seal body, characterized in that, The rubber sealing ring body has an elastic component fixedly connected inside by an insert injection molding process. The elastic component includes a torsion frame, an elastic colloid, and an annular spring. The torsion frame includes a first plate and a second plate. The first plate is fixedly connected to the second plate by a connecting rod. The elastic colloid is fixedly connected to the torsion frame and the annular spring by an insert injection molding process.

2. The high-strength pneumatic rubber sealing ring with long service life according to claim 1, characterized in that, The first plate, the second plate, and the connecting rod are all made of stainless steel and are fixedly connected by laser welding.

3. The high-strength pneumatic rubber sealing ring with long service life according to claim 1, characterized in that, The annular spring is made of high-elasticity steel.

4. The high-strength pneumatic rubber sealing ring with long service life according to claim 1, characterized in that, The elastic colloid is made of silicone rubber.

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