Spring sealing ring

Abstract

The utility model discloses a spring sealing ring which comprises an elastic body and a spring embedded in the elastic body, the elastic body is of an annular columnar structure and sequentially comprises an inner layer, a middle layer and an outer layer from inside to outside, the inner layer is provided with a positioning groove, the spring is arranged in the positioning groove, the middle layer is a net-shaped reinforcing layer formed by weaving fibers, and the outer layer is a net-shaped reinforcing layer formed by weaving fibers. The net-shaped reinforcing layer covers the positioning grooves, the positioning grooves in the inner layer accurately fix the positions of the springs, deviation is prevented, it is ensured that the sealing ring is evenly stressed, the fiber-woven net-shaped reinforcing layer in the middle layer covers the spring grooves, radial supporting force is provided, elastic body deformation caused by spring expansion is resisted, and meanwhile the overall compression resistance and shear resistance are enhanced. The outer layer is in direct contact with the external environment, corrosion-resistant and wear-resistant material selection can be achieved according to working conditions, the service life is prolonged, the spring embedding design is combined with the flexibility of the elastic body, the sealing ring has high rebound resilience and self-adaptive deformation capacity, and the sealing ring is suitable for dynamic sealing scenes of reciprocating motion.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sealing ring especially relates to a spring sealing ring. BACKGROUND

[0002] The current spring sealing ring generally adopts the spring with elastic recovery capacity in the sealing ring, can play the role of internal support, but will lead to the spring extending the sealing ring to cause the sealing ring body and spring to separate under the condition of the long -term use causes abrasion, thereby causes the unsealing, and this kind of spring sealing ring has the shortcoming of short service life of easy abrasion. SUMMARY

[0003] The utility model provides a spring sealing ring in view of the shortcoming of short service life of easy abrasion of prior art.

[0004] In order to solve the above technical problem, the utility model solves through the following technical scheme:

[0005] The utility model sets up: a kind of spring sealing ring, including elastomer and spring embedded in elastomer, elastomer is annular column structure and includes inner layer, middle layer and outer layer in turn from inside to outside, the inner layer is provided with positioning groove, the spring is arranged in positioning groove, the middle layer is the meshed reinforcing layer made of fiber weaving, the meshed reinforcing layer cover is set in positioning groove setting.

[0006] By adopting the above technical scheme, the positioning groove of inner layer accurately fixes spring position, prevents deviation, ensures that sealing ring is uniformly stressed, the fiber woven meshed reinforcing layer of middle layer covers spring groove, provides radial support force, resists the deformation of elastomer caused by spring expansion, while enhancing overall compression and shear resistance performance;Outer layer directly contacts external environment, can be selected according to working condition Corrosion resistance, wear resistance, prolong service life, spring embedding design combines the flexibility of elastomer, so that sealing ring has high resilience and self-adapting deformation ability, is suitable for reciprocating motion Dynamic sealing scene.

[0007] The utility model further sets up: the outer layer both ends are provided with end cap layer, and the end cap layer is wrapped around the end of the middle layer and the inner layer.

[0008] By adopting the above technical scheme, the end cap layer wraps the end of the middle layer and the inner layer, forms closed structure, prevents external pollutants from invading interlayer gap, avoids layered failure, enhances end structure strength, reduces the risk of edge cracking caused by installation or pressure impact, further optimizes the axial sealing performance of sealing ring, especially reduces medium leakage under high pressure difference working condition.

[0009] The utility model further sets up: the end cap layer is integrally formed with the outer layer.

[0010] By adopting the technical scheme, the integrally formed end cover layer and the outer layer simplify the manufacturing process, reduce the production cost, eliminate the interface weakness of traditional bonding or mechanical fixation, improve the bonding strength of the end cover layer and the outer layer, and avoid delamination caused by temperature difference or pressure fluctuation.

[0011] The utility model further sets up: the inner layer end part is provided with ring groove, the outer layer and the inner layer are provided with twice forming, the end cover layer generates cooperation buckling ring with ring groove in twice forming.

[0012] By adopting the technical scheme, the inner layer ring groove and the end cover layer buckling ring cooperate to form a mechanical interlocking structure, significantly enhancing the interlayer bonding force, preventing the inner layer from sliding relative to the outer layer, and ensuring the precise formation of the buckling ring through the twice forming process (first forming the inner layer, then injection molding the outer layer), thereby improving the structural stability, and being particularly suitable for high temperature and high pressure environments.

[0013] The utility model further sets up: the end cover layer outer surface is provided with annular bead, the annular bead cross section is trapezoidal and height is 0.2-1 times of end cover layer thickness.

[0014] By adopting the technical scheme, the trapezoidal cross section annular bead generates contact stress through compression deformation during installation, fills the microscopic unevenness of the sealing surface, improves the static sealing effect, and balances the deformation amount and the extrusion resistance by setting the bead height to 0.2-1 times of the end cover layer thickness, thereby avoiding permanent deformation caused by excessive compression or leakage caused by insufficient height.

[0015] The utility model further sets up: the annular bead is circumferentially spaced to form anti-skid lines.

[0016] By adopting the technical scheme, the circumferentially spaced anti-skid lines increase the surface friction coefficient of the end cover layer, prevent the sealing ring from slipping or twisting during installation, ensure accurate positioning, and retain a certain elasticity by spacing design, thereby avoiding excessive rigidity affecting the sealing adaptability.

[0017] The utility model further sets up: the inner layer adopts a silicone rubber material, and the silicone rubber material of the inner layer further adds silica particles.

[0018] By adopting the technical scheme, the silicone rubber inner layer provides excellent temperature resistance and chemical inertness, is suitable for harsh media, adds silica particles as a reinforcing filler to improve the hardness, tear resistance and wear resistance of the inner layer, and reduces wear caused by long-term friction of the spring.

[0019] The utility model further sets up: the intermediate layer is woven from polytetrafluoroethylene fibers, and the weaving direction of the polytetrafluoroethylene fibers is set at an angle of 30° to 60° with respect to the axial direction of the inner layer.

[0020] By adopting the above technical scheme, the polytetrafluoroethylene fiber woven intermediate layer combines the low friction coefficient and chemical stability of polytetrafluoroethylene, reduces the movement resistance of the sealing ring, prolongs the service life, and optimizes the fiber stress direction at a weaving angle of 30-60 degrees, so that the intermediate layer has axial tensile resistance and radial expansion resistance, and avoids interlayer peeling caused by spring stress concentration. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an external structure diagram of a spring sealing ring in the embodiment;

[0022] Figure 2 is a perspective sectional view of a spring sealing ring in the embodiment;

[0023] The part names referred to by the numbers in the above drawings are as follows: 1, elastomer; 2, spring; 11, inner layer; 12, intermediate layer; 13, outer layer; 111, positioning groove; 112, ring groove; 131, end cap layer; 132, buckling ring; 133, annular protruding rib; and 134, anti-skid pattern. DETAILED DESCRIPTION

[0024] The application will be further described in detail below in combination with the drawings and embodiments.

[0025] Embodiment:

[0026] A spring sealing ring, referring to Figure 1 and Figure 2 , comprises an elastomer and a spring embedded in the elastomer, the elastomer has a ring-shaped columnar structure and comprises an inner layer, an intermediate layer and an outer layer from inside to outside, the inner layer, the intermediate layer and the outer layer are arranged concentrically, the inner layer is made of silicone rubber material, the silicone rubber material of the inner layer is additionally provided with silica particles, the silica particles are used to enhance the structural strength of the inner layer, a positioning groove is formed on the outer side surface of the inner layer, the positioning groove is annularly formed on the outer side surface of the inner layer, the spring is arranged in the positioning groove, the intermediate layer is a mesh-shaped reinforcing layer made of fiber weaving, the intermediate layer is made of polytetrafluoroethylene fiber weaving, and the weaving direction of the polytetrafluoroethylene fiber is arranged at an angle of 30-60 degrees with respect to the axial direction of the inner layer. The mesh-shaped reinforcing layer formed by the intermediate layer is arranged on the positioning groove to avoid the spring from moving out of the positioning groove.

[0027] The outer layer is made of silicone rubber material, the outer layer is provided with an end cap layer at both ends, the end cap layer is wrapped around the end portions of the intermediate layer and the inner layer, the end cap layer is integrally formed with the outer layer, the end portion of the inner layer is provided with a ring groove, the outer layer is secondarily formed after the spring and the intermediate layer are installed, the end cap layer generates a buckling ring matched with the ring groove during the secondary forming, the outer surface of the end cap layer is provided with an annular protruding rib, the annular protruding rib has a trapezoidal cross section and a height of 0.2-1 times the thickness of the end cap layer, the outer circle of the annular protruding rib is provided with an anti-skid pattern, and the anti-skid pattern is uniformly and spacedly arranged in an outward extending manner.

Claims

1. A spring sealing ring, characterized in that, The device includes an elastomer (1) and a spring (2) embedded in the elastomer (1). The elastomer (1) has a ring-shaped columnar structure and includes an inner layer (11), a middle layer (12) and an outer layer (13) from the inside to the outside. The inner layer (11) is provided with a positioning groove (111). The spring (2) is disposed in the positioning groove (111). The middle layer (12) is a mesh reinforcement layer made of woven fibers. The mesh reinforcement layer is disposed over the positioning groove (111).

2. A spring sealing ring according to claim 1, characterized in that, The outer layer (13) has end caps (131) extending from both ends, and the end caps (131) wrap around the end layers of the middle layer (12) and the inner layer (11).

3. A spring sealing ring according to claim 2, characterized in that, The end cap layer (131) and the outer layer (13) are integrally formed.

4. A spring sealing ring according to claim 2, characterized in that, The inner layer (11) has a protruding annular groove (112) at its end. The outer layer (13) and the inner layer (11) are formed in a secondary molding process. The end cap layer (131) generates a fastening ring (132) that matches the annular groove (112) during the secondary molding process.

5. A spring sealing ring according to claim 2, characterized in that, The outer surface of the end cap layer (131) is provided with an annular rib (133), the annular rib (133) has a trapezoidal cross section and its height is 0.2 to 1 times the thickness of the end cap layer (131).

6. A spring sealing ring according to claim 5, characterized in that, The annular ribs (133) are circumferentially spaced to form anti-slip patterns (134).

7. A spring sealing ring according to claim 1, characterized in that, The inner layer (11) is made of silicone rubber, and the silicone rubber material of the inner layer (11) also contains silica particles.

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