Elastic annular composite sealing structure

Abstract

The utility model discloses an elastic annular composite sealing structure which comprises an elastic sealing ring which is of an annular closed structure and can deform in a pressed state to form self-adaptive sealing. The reinforced supporting layer wraps the inner side of the elastic sealing ring and is uniformly distributed in the circumferential direction, so that the pressure resistance and the creep resistance of the sealing structure are improved; and the corrugated elastic layer is located on the peripheral surface of the reinforced supporting layer, adopts a periodic corrugated structural design, and can generate radial elastic deformation in a pressed state so as to provide additional sealing stress, improve the sealing rebound capability and reduce contact stress and friction loss. In addition, the reinforcing supporting layer and the corrugated elastic layer are both embedded into the elastic sealing ring, an integrated structure is formed through the high-temperature co-firing combination technology, and the long-term stability and durability of the sealing piece are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing ring technical field, concretely is a kind of elastic ring composite sealing structure. BACKGROUND

[0002] In fluid sealing, rotating machinery, hydraulic systems and other industrial applications requiring sealing, the performance of the sealing structure directly affects the stability and service life of the equipment. The common sealing elements currently mainly include rubber sealing ring, metal sealing ring, filled polytetrafluoroethylene (PTFE) sealing ring, etc., but these sealing elements still have many deficiencies under high pressure, high temperature, dynamic load or complex environment:

[0003] Traditional rubber sealing ring mainly uses fluororubber (FKM), silicone rubber (VMQ), ethylene-propylene rubber (EPDM) and other materials. This type of sealing ring has good elasticity and flexibility, and can adapt to certain deformation requirements, but it is easy to age, harden or fail under high temperature, high pressure or chemical corrosion environment. In addition, the rubber sealing ring has poor wear resistance and is easy to wear under high-speed rotation or reciprocating motion environment, resulting in leakage.

[0004] Metal sealing ring is made of stainless steel, nickel-based alloy or copper alloy, has good high-temperature resistance and corrosion resistance, and can withstand high working pressure. However, the metal sealing ring has high rigidity and cannot adapt to deformation under dynamic load environment, which is easy to cause damage to the contact surface or sealing failure due to stress concentration. In addition, the metal sealing ring requires a large pre-tightening force during assembly, and has high installation precision, which increases the manufacturing cost and use difficulty.

[0005] Polytetrafluoroethylene (PTFE) sealing ring is widely used in chemical equipment, medical devices and other fields due to its excellent corrosion resistance and high temperature resistance. However, PTFE sealing ring has a large creep property, i.e. it is easy to deform under long-term pressure, resulting in a decrease in sealing performance. In addition, the friction coefficient of PTFE material is high, and without additional lubrication measures, it is easy to wear in dynamic sealing applications, accelerating the failure of the sealing element.

[0006] In view of the above problems, some existing technologies attempt to combine metal skeleton with elastic material to improve the rigidity and durability of the sealing ring. For example, metal-reinforced rubber sealing ring combines the rigid support of metal with the elastic sealing properties of rubber, and is suitable for high-pressure working conditions. However, the traditional metal-reinforced structure usually only uses a single layer of metal skeleton, which cannot adapt to large deformation, and is still prone to failure in high-frequency motion or severe pressure change environment.

[0007] Therefore, in view of the existing problems, an elastic ring composite sealing structure is provided to solve the existing problems, and to achieve the purpose of solving the problems and improving the practical value. Utility model content

[0008] The utility model aims at solving the technical problems in prior art or related art.

[0009] The utility model relates to a sealing structure, in particular to a elastic annular composite sealing structure, which is suitable for sealing application of high-pressure pipeline, rotating shaft, hydraulic system and reciprocating device.

[0010] The utility model provides a annular composite sealing structure which is stable in structure and superior in sealing performance, and the sealing structure comprises:

[0011] The elastic sealing ring is annular closed structure, is made of multilayer composite elastic material, can be deformed under pressure state to form self-adaptive sealing, ensures the close adhesion of sealing surface and sealing contact surface, improves sealing reliability;

[0012] The reinforced support layer is cladded to the inboard side of the elastic sealing ring, is evenly arranged along the circumference, provides additional structural support to improve the pressure resistance and anti-creep performance of the sealing structure, prevents deformation caused by long-term stress;

[0013] The corrugated elastic layer is located on the outer circumferential surface of the reinforced support layer, is designed with a periodic corrugated structure, and the corrugated structure can produce radial elastic deformation under the pressure state of the sealing ring to provide additional sealing stress, improve the sealing resilience, and effectively reduce the contact stress and friction loss.

[0014] In the improvement scheme of the utility model, the elastic sealing ring is provided with a plurality of evenly distributed groove structures along the axial direction, forming a flexible deformation area, which can improve the adhesion of the sealing surface and enhance the buffering capacity of the sealing ring, and reduce friction loss.

[0015] To further improve the overall stability of the sealing structure, the reinforced support layer and the corrugated elastic layer are embedded in the elastic sealing ring, and are formed into an integrated structure through high-temperature co-burning combination process, avoiding the problem of interlayer separation or falling caused by bonding or mechanical cooperation.

[0016] The utility model discloses a multilayer structure design realizes more optimal sealing performance, and can be widely used in various high-precision, high durability sealing demand scene, including high pressure hydraulic system, aerospace engine seal, deep sea equipment sealing etc.

[0017] The utility model discloses the obtained beneficial effect is:

[0018] 1. The utility model discloses a multilayer composite structure design makes the sealing ring can be deformed evenly after being pressed, and the sealing surface is closely combined, ensures that the sealing performance is stable and reliable. The reinforced support layer provides additional rigid support, prevents the deformation or failure of the sealing ring under high pressure environment due to long-term stress.

[0019] 2. The utility model discloses a reinforced support layer adopts high-strength structure design, can bear higher pressure, reduces material creep under long-term use simultaneously, improves the long-term stability of the sealing ring. Adopt high-temperature co-burning combination process, make the internal structure of sealing ring more closely, reduce the risk of interlayer peeling, improve the structure durability.

[0020] 3. The utility model discloses a low friction structure is equipped with on the elastic sealing ring surface, reduces the friction resistance produced in the movement process of sealing ring, thereby reduces abrasion, improves the long-term service life of sealing ring. The low carbon steel wire material member is embedded in the corrugated elastic layer, improves the resilience of the sealing ring, prevents permanent deformation due to long-term stress, prolongs the service cycle of the sealing ring.

[0021] The utility model discloses optimizing sealing structure design, improves the sealing effect, durability and adaptability of sealing element significantly, especially in high pressure, high temperature, dynamic sealing environment, solves the problem that the existing sealing structure is easy to fail under complex environment, short service life. DRAWINGS

[0022] Figure 1 It is the overall structure schematic diagram of an embodiment of the utility model;

[0023] Figure 2 It is the partial section structure schematic diagram of an embodiment of the utility model;

[0024] Figure 3 It is the reinforced support layer and corrugated elastic layer structure schematic diagram of an embodiment of the utility model.

[0025] REFERENCE NUMERALS

[0026] 100, elastic sealing ring;200, reinforced support layer;300, corrugated elastic layer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further explained in detail below in combination with specific embodiments and referring to the drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0028] It is understood that the description is only exemplary and is not intended to limit the scope of the utility model.

[0029] The utility model is described below in combination with the accompanying Figures 1-3 Some embodiments of the utility model provide a kind of elastic annular composite sealing structure.

[0030] Referring to Figure 1 The utility model provides a kind of elastic annular composite sealing structure, comprising:

[0031] Elastic sealing ring 100, the sealing ring is annular closed structure, is made of multilayer composite elastic material, can be deformed under pressure state and is closely attached to sealing contact surface, to form effective self-adapting sealing effect;

[0032] Reinforced support layer 200, the support layer is covered in the inside of elastic sealing ring 100, is evenly arranged along the circumference, is made of high-strength metal or reinforced fiber material, to enhance the pressure resistance of sealing structure, prevent the creep deformation caused by long-term stress;

[0033] Corrugated elastic layer 300, the corrugated elastic layer is located at the outer circumferential surface of reinforced support layer 200, is periodic corrugation structure, and the corrugation can produce radial elastic deformation when being under pressure, to provide additional sealing stress, improve the resilience of sealing ring, and reduce contact stress and friction loss.

[0034] In the embodiment, the elastic sealing ring 100 is provided with a plurality of evenly distributed groove structures along the axial direction, which can form a flexible deformation zone. When the sealing ring is subjected to axial load, the groove can provide additional buffer space, so that the sealing surface is more easily attached to the sealing contact surface, thereby improving the overall sealing effect. At the same time, this structure can form multi-point support after the sealing ring is under pressure, improve the dynamic sealing performance, and reduce friction and wear.

[0035] In the embodiment, the reinforced support layer 200 adopts a ring frame structure, and a plurality of reinforcing ribs or support rings are evenly arranged in the circumferential direction. The reinforcing ribs are used to improve the overall rigidity of the sealing ring in a high-pressure environment, to prevent the sealing ring from deforming or breaking down under high load. The arrangement of the support ring enables the sealing ring to maintain stable structural strength after long-term use, improves the durability of the sealing structure, and is particularly suitable for high-pressure pipelines, hydraulic sealing and other application scenarios that require long-term stable sealing performance.

[0036] In the embodiment, the corrugated structure of the corrugated elastic layer 300 is arranged in a radial direction and an axial direction, and the design of the two-way corrugated structure enables the sealing structure to adapt to load changes from different directions.

[0037] In the embodiment, the reinforcing support layer 200 and the corrugated elastic layer 300 are embedded in the elastic sealing ring 100 and combined by high-temperature co-firing.

[0038] The manufacturing process can ensure that the reinforcing support layer and the sealing ring form an integrated structure, avoid the delamination or peeling problems that may occur in the traditional bonding method, and improve the overall strength of the sealing member. In addition, the co-firing combination process can also ensure the uniformity of the internal structure of the sealing ring, making it more durable in a high-pressure environment and less likely to crack or delaminate.

[0039] In the embodiment, the elastic sealing ring 100 is provided with a low-friction structure on the surface, which is used to reduce the frictional resistance generated during the movement of the sealing ring and improve the wear resistance and service life.

[0040] The low-friction structure can be in the form of a micro-bump, a micro-hole, or a flow guide groove, forming a small fluid lubricating layer on the surface of the sealing ring, so that the frictional force is reduced during the movement of the sealing ring, and the wear on the surface of the sealing ring is also reduced, so that the sealing ring can still maintain stable sealing effect in high-frequency sealing environments such as rotation and reciprocating motion.

[0041] In the embodiment, the corrugated elastic layer 300 is made of low-carbon steel wire material and is embedded and installed on the upper and lower surfaces of the elastic sealing ring 100, which is used to enhance the resilience of the sealing ring.

[0042] The low-carbon steel wire component can provide higher recovery capability after the sealing ring is pressed, so that the sealing ring can maintain stable deformation compensation capability during long-term use. In addition, the low-carbon steel wire material can withstand a large stress, so that the sealing ring can still maintain good sealing performance in a high-pressure and high-temperature environment, and can effectively prevent permanent deformation problems caused by long-term use.

[0043] Principle of the utility model:

[0044] The elastic annular composite sealing structure is used, the deformation of the elastic sealing ring 100 is used, the sealing contact surface is formed closely, the support layer 200 is provided with stable support, the failure of the sealing ring is prevented due to high pressure or long-term stress, the corrugated elastic layer 300 is elastically deformed under the action of external pressure, the sealing resilience is improved, and the dynamic adaptability is enhanced.

[0045] The utility model is suitable for high pressure pipeline, rotary shaft seal, hydraulic system seal, reciprocating motion seal and other long-term reliable sealing application environment. Its structure design can provide stable sealing performance under high temperature, high pressure, corrosive environment, and effectively prolong the service life of the sealing element.

[0046] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An elastomeric annular composite seal structure, characterized by, The application relates to a sealing ring, which comprises the following parts: an elastic sealing ring (100) in a ring-shaped closed structure, made of multilayer composite elastic material, capable of deforming to form self-adaptive sealing under pressure; a reinforcing support layer (200) wrapped on the inner side of the elastic sealing ring (100), arranged in the circumferential direction, made of high-strength metal or reinforced fiber material, so as to improve the pressure resistance and anti-creep performance of the sealing structure; a corrugated elastic layer (300) located on the outer circumferential surface of the reinforcing support layer (200), designed in a periodic corrugated structure, so as to increase the rebounding capacity of the sealing ring, improve the dynamic sealing adaptability, and effectively reduce the contact stress and friction loss.

2. A resilient annular composite seal structure according to claim 1, wherein The elastic sealing ring (100) is provided with a plurality of uniformly distributed groove structures in the axial direction, so as to form a flexible deformation area, improve the adhesion of the sealing surface and the sealing effect.

3. The elastomeric ring composite seal structure of claim 1, wherein, The reinforcing support layer (200) has a ring-shaped frame structure, and a plurality of reinforcing ribs or support rings are arranged in the circumferential direction, so as to increase the rigidity and stability of the sealing structure.

4. The elastomeric ring composite seal structure of claim 1, wherein, The corrugated structure of the corrugated elastic layer (300) is arranged in the radial and axial directions, so as to adapt to the load change in different directions and improve the self-adaptive adjusting capacity of the sealing ring.

5. The elastomeric ring composite seal structure of claim 1, wherein, The reinforcing support layer (200) and the corrugated elastic layer (300) are embedded in the elastic sealing ring (100) and combined by high-temperature co-firing.

6. The elastomeric ring-shaped composite seal structure of claim 1, wherein, The surface of the elastic sealing ring (100) is provided with a low-friction structure, which is used for reducing the friction resistance generated in the movement process of the sealing ring, improving the wear resistance and service life.

7. The elastomeric ring-shaped composite seal structure of claim 1, wherein, The corrugated elastic layer (300) is made of low-carbon steel wire material and is embedded and installed on the upper and lower surfaces of the elastic sealing ring (100), so as to increase the rebounding capacity of the sealing ring.

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