O-shaped sealing ring

Abstract

The utility model discloses a sealing O-shaped ring which comprises an elastic sealing ring and an inner supporting framework arranged in the elastic sealing ring, the elastic sealing ring is provided with an extrusion portion in a protruding mode, and the inner supporting framework comprises a first supporting section and a second supporting section. One ends of the first supporting section and the second supporting section are connected, the other ends of the first supporting section and the second supporting section are separated from each other to form an angle, the angle formed by the first supporting section and the second supporting section faces the extrusion part, and the inner supporting framework is designed in the mode that the angle formed by the first supporting section and the second supporting section faces the extrusion part through the supporting end. The anti-extrusion capacity of the sealing ring under the high-pressure or dynamic working condition is enhanced, the angle direction is matched with the extrusion part, pressure distribution of the sealing ring is optimized, the extrusion direction of the extrusion part is effectively controlled, the sealing effect is enhanced, the rebound effect of the sealing ring is further enhanced through the inner supporting framework, and the service life of the sealing ring is prolonged. And the service life of the sealing ring can be prolonged through the good rebound effect under the dynamic working condition.

Description

TECHNICAL FIELD

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

[0002] The existing O type sealing ring adopts single rubber elastomer or simple metal framework and rubber composite structure, and faces significant performance bottleneck in high pressure or dynamic working condition, and the traditional butyl nitrile rubber, fluorine rubber and other materials are insufficient in extrusion resistance under high pressure, the elastomer is easily extruded into the flange or shaft hole gap when the system pressure exceeds the material yield strength, which causes permanent structural damage and causes medium leakage, and this problem is particularly prominent in temperature fluctuation scene, the existing metal support framework can improve the overall rigidity, but the difference between the thermal expansion coefficients of metal and rubber causes microcracks at the interface, and the delamination failure of the adhesive layer occurs under long-term alternating load, and the rigid metal framework hinders the self-adaptive deformation of the sealing ring in dynamic displacement, causing unbalanced contact pressure distribution. SUMMARY

[0003] The utility model provides a sealing O type ring in view of the existing sealing ring imbalance under dynamic working condition in prior art.

[0004] In order to solve the above technical problem, the utility model discloses a sealing O type ring, characterized by including elastic sealing ring and the inner support framework that sets up in elastic sealing ring, the elastic sealing ring protrudes and is provided with extrusion part, the inner support framework includes support section one and support section two, one end of support section one and support section two is connected, and the other end of support section one and support section two is mutually separated and is formed angle arrangement, the angle direction formed by support section one and support section two is arranged towards extrusion part.

[0005] Through the above technical scheme, the inner support framework is designed to have the angle of support end and support section two towards the direction of extrusion part, which enhances the extrusion resistance of the sealing ring under high pressure or dynamic working condition, optimizes the pressure distribution of the sealing ring by using the angle direction and the extrusion part, effectively controls the extrusion direction of the extrusion part, enhances the sealing effect, and the inner support framework also enhances the rebound effect of the sealing ring.

[0006] The utility model further sets up that the elastic sealing ring is annular, and the extrusion part is arranged in the inner circle or outer circle of the elastic sealing ring.

[0007] Through the above technical scheme, the extrusion part is arranged in the inner circle or outer circle of the elastic sealing ring, which increases the diversity of sealing, adapts to different installation scenes, and the outer circle extrusion part is suitable for hole sealing, and the inner circle extrusion part is suitable for shaft sealing.

[0008] The utility model further sets up: the inner support framework presents annularly and sets up, the center plane of inner support framework and the center plane of elastic sealing ring are coincident, support section one and support section two are symmetrically set up.

[0009] By adopting the above technical scheme, the inner support framework and the elastic sealing ring are in the same plane and symmetrically designed, the uniform transmission of the supporting force is ensured, the deformation of the sealing ring caused by the eccentric load is avoided, and the service life of the sealing ring is prolonged.

[0010] The utility model further sets up: the inner support framework is provided with an auxiliary support strip, and the auxiliary support strip partially extends out of the elastic sealing ring.

[0011] By adopting the above technical scheme, the auxiliary support strip extends out of the elastic sealing ring, and the auxiliary support strip plays a role in assisting the support. When the sealing ring is vulcanized, the auxiliary support strip plays a role in supporting in the mold. After the sealing ring is processed, the excess auxiliary support strip is cut off along the edge of the sealing ring by the cutting device.

[0012] The utility model further sets up: the auxiliary support strip is set on the side of the inner support framework away from the extrusion part.

[0013] By adopting the above technical scheme, the auxiliary support strip is set on the side away from the extrusion part, so that the elastic deformation ability of the sealing ring is ensured.

[0014] The utility model further sets up: the auxiliary support strip is set on the side of the inner support framework away from the extrusion part.

[0015] By adopting the above technical scheme, the auxiliary support strip in the annular array can increase the structural strength.

[0016] The utility model further sets up: the angle between the support section one and the support section two is 30-60 degrees.

[0017] By adopting the above technical scheme, the support section angle is 30-60 degrees, the balance between the supporting strength and the elastic deformation space is achieved, the high-pressure deformation can be resisted, and the dynamic displacement compensation can be adapted.

[0018] The utility model further sets up: the inner support framework is made of PU material.

[0019] By adopting the above technical scheme, the inner support framework made of PU material has high elastic modulus and fatigue resistance, forms a hardness gradient with the elastic sealing ring, and improves the overall anti-creep performance. DRAWINGS

[0020] Figure 1is a schematic diagram of a whole structure of a sealing O-ring in an embodiment;

[0021] Figure 2 is a sectional view of a sealing O-ring in an embodiment.

[0022] The part names referred to by the numbers in the above drawings are as follows: 1, elastic sealing ring; 2, inner support framework; 21, support section one; 22, support section two; 23, auxiliary support strip; 3, extrusion part. DETAILED DESCRIPTION

[0023] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0024] Embodiment:

[0025] A sealing O-ring, referring to Figure 1 and Figure 2 , comprising an elastic sealing ring 1 and an inner support framework 2 arranged in the elastic sealing ring 1, the inner circle or the outer circle of the elastic sealing ring 1 is provided with an extrusion part, the extrusion part and the elastic sealing ring 1 are made of the same material and are integrally formed, the elastic sealing ring 1, the extrusion part and the inner support framework 2 are all annular and the central axes of the three are all arranged coincidently, the inner support framework 2 comprises a support section one 21 and a support section two 22, the support section one 21 and the support section two 22 are arranged at an angle, one end of the support section one 21 and the support section two 22 is connected and the other end of the two is arranged away from each other, the angle direction formed by the support section one 21 and the support section two 22 is arranged towards the extrusion part, the angle formed by the support section one 21 and the support section two 22 is between 30 degrees and 60 degrees.

[0026] The central plane of the inner support frame 2 coincides with the central plane of the elastic sealing ring 1. Support segment 1 21 and support segment 22 are symmetrically arranged, and the connection point between them is located on the central plane of the elastic sealing ring 1. This central plane is the plane formed by points parallel and equal to the upper and lower end faces of the elastic sealing ring 1. The inner support frame 2 has a protruding auxiliary support strip 23, which is located on the side of the inner support frame 2 away from the extrusion section. The auxiliary support strip 23 extends beyond the elastic sealing ring 1. When the extrusion section is located within the inner ring of the elastic sealing ring 1, the auxiliary support strip 23 faces towards the outer ring of the elastic sealing ring 1 and partially extends beyond the outer ring. When the extrusion section is located within the inner ring of the elastic sealing ring 1, the auxiliary support strip 23 extends towards the outer ring of the elastic sealing ring 1. When the outer ring 1 is formed, the auxiliary support strip 23 is set towards the inner ring of the elastic sealing ring 1 and partially extends out of the inner ring of the elastic sealing ring 1. The support section 1 21, the support section 22 and the auxiliary support strip 23 are all integrally formed. The inner support skeleton 2 and the auxiliary support strip 23 are both made of PU material. There are several auxiliary support strips 23, which are arranged in a ring array relative to the inner support skeleton 2. The main function of the auxiliary support strip 23 is to fix the inner support skeleton 2 on the mold during the vulcanization of the elastic sealing ring 1. After the elastic sealing ring 1 is vulcanized, the elastic sealing ring 1 completely wraps the inner support skeleton 2. Then, through the correction process, the part of the auxiliary support strip 23 exposed outside the elastic sealing ring 1 is removed.

[0027] The function of the inner support frame 2 is to support the elastic sealing ring 1. When the upper and lower sides of the sealing ring are squeezed, the extrusion part is squeezed and deformed and forms an effective seal with the workpiece. At this time, both support section 1 21 and support section 22 are also squeezed. Under the action of the inner support frame 2, the extrusion part can be squeezed in a better direction, which increases the specific sealing effect. When the squeezing force on the upper and lower sides of the sealing ring disappears, the support section 1 21 and support section 22 can restore the extrusion part and the elastic sealing ring 1.

Claims

1. A seal O-ring characterized by, The application relates to an elastic sealing ring (1) and an inner support framework (2) arranged in the elastic sealing ring (1), wherein the elastic sealing ring (1) is provided with an extrusion part, the inner support framework (2) comprises a support section one (21) and a support section two (22), one end of the support section one (21) and the support section two (22) is connected, and the other end of the support section one (21) and the support section two (22) is arranged in an angle direction towards the extrusion part.

2. A seal O-ring according to claim 1, wherein The elastic sealing ring (1) is annular, and the extrusion part is arranged in the inner ring or the outer ring of the elastic sealing ring (1).

3. The seal O-ring of claim 1, wherein The inner support framework (2) is annular, the central plane of the inner support framework (2) is arranged in coincidence with the central plane of the elastic sealing ring (1), and the support section one (21) and the support section two (22) are symmetrically arranged.

4. The seal O-ring of claim 1, wherein The inner support framework (2) is provided with auxiliary support strips (23), and the auxiliary support strips (23) partially extend out of the elastic sealing ring (1).

5. A seal O-ring according to claim 4, wherein The auxiliary support strips (23) are arranged on the side of the inner support framework (2) away from the extrusion part.

6. A seal O-ring according to claim 4, wherein The auxiliary support strips (23) are arranged in an annular array relative to the inner support framework (2).

7. The seal O-ring of claim 1, wherein The angle between the support section one (21) and the support section two (22) is 30-60 degrees.

8. The seal O-ring of claim 1, wherein The inner support framework (2) is made of pu material.

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