Sealing ring

Abstract

The utility model relates to the technical field of sealing rings, and discloses a sealing ring which comprises a ring body and a double-sealing portion, the double-sealing portion comprises a first lip and a second lip, the first lip is symmetrically arranged on an outer ring of the ring body in a protruding mode and protrudes outwards in the radial direction of the ring body, the second lip is symmetrically arranged on an inner ring in a protruding mode, and the first lip and the second lip protrude outwards in the radial direction of the ring body. The second lip protrudes along the radial direction of the ring body; the distance between the symmetrical first lips is larger than the distance between the symmetrical second lips.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring technology, specifically a sealing ring. Background Technology

[0002] Sealing rings are typically used to prevent fluid leakage and to prevent impurities from entering.

[0003] Traditional sealing rings also have several problems: they are generally simple lip designs with a single diameter and single layer of protection, relying on a thin lip edge to contact the connection point, resulting in poor sealing performance. Traditional lips are mostly uniformly spaced and of consistent width, and their outer rings are often flat without additional protective protrusions, allowing impurities to easily enter the equipment through the gaps in the outer ring. The inner lip is often flat, which can lead to insufficient fit under dynamic oil conditions, thus affecting the sealing effect.

[0004] Therefore, a sealing ring is urgently needed to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a sealing ring to solve the problem of poor sealing of traditional sealing rings.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A sealing ring, comprising:

[0008] Circle body;

[0009] The double sealing part includes a first lip and a second lip. The first lip is symmetrically protruding on the outer ring of the ring body and protrudes outward along the radial direction of the ring body. The second lip is symmetrically protruding on the inner ring and protrudes radially along the ring body.

[0010] The distance between the symmetrical first lips is greater than the distance between the symmetrical second lips.

[0011] As a preferred embodiment of the sealing ring, the first lip protrudes radially outward to form a plane, which is a sealing surface used to mate with the connecting surface and uniformly distribute contact pressure.

[0012] As a preferred embodiment of the sealing ring, a first chamfer is formed by chamfering the opposite sides between the first lips, and a second chamfer is formed by chamfering the opposite sides between the second lips. Both the first and second chamfers are based on the radial center axis of the ring body, and the angle of the first chamfer is smaller than the angle of the second chamfer.

[0013] As a preferred sealing ring, an oil groove is arranged on the side of the ring body, and the oil groove is used for guiding the flow direction of oil.

[0014] As a preferred sealing ring, the inner wall width of the oil groove expands from the axial inner side to the axial outer side of the ring body, and the oil groove is used for uniformly distributing oil and buffering oil pressure.

[0015] As a preferred sealing ring, the width of the ring body is reduced from the outer ring to the inner ring, and the width reduction is used for enhancing the sealing extrusion and preventing leakage.

[0016] As a preferred sealing ring, the second lip is radially outwardly protruded to form a lip peak, and the lip peak is used for bearing fluctuating pressure in dynamic sealing.

[0017] As a preferred sealing ring, the outer ring is made of wear-resistant material, and the wear-resistant outer ring is used for resisting external friction and wear.

[0018] As a preferred sealing ring, the inner ring is made of soft and good sealing material, and the inner ring is used for directly contacting the sealing medium.

[0019] As a preferred sealing ring, the middle part of the ring body is made of material with strength, and the middle part of the ring body is used for enhancing the pressure resistance of the sealing ring and preventing the sealing ring from being excessively deformed under high pressure to lose the sealing function.

[0020] The beneficial effects of the sealing ring are as follows: the first lip and the second lip are used to build a double sealing defense line, the reliability of sealing is enhanced, if slight leakage is found in later use, the damaged lip is treated in most cases, the other lip can still maintain basic sealing by virtue of the double protection characteristics, the downtime maintenance time is reduced, the equipment maintenance process is greatly optimized, and the practicability is far superior to that of a traditional sealing piece. The first lip is symmetrically and outwardly protruded on the outer ring of the ring body and radially outwardly protruded, and can block most impurities; the second lip is symmetrically and outwardly protruded on the inner ring of the ring body and radially outwardly protruded, and can tightly fit the connection part to prevent fluid leakage. The first lip with a large spacing is in an outwardly expanded shape, the contact area is increased, and most impurities can be intercepted and blocked; the second lip with a small spacing has a more concentrated contact area and a larger contact pressure on the connection part, and the sealing force is improved. The width difference between the inner and outer lips forms a gradient sealing shape, and the inner and outer lips cooperate in layers to ensure that the sealing area is not affected by pollution and leakage. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model provides a kind of overall structure schematic view of sealing ring;

[0022] Figure 2 The utility model provides a kind of front view of sealing ring.

[0023] Figure 3 A side view of the sealing ring is provided in the utility model;

[0024] Figure 4 A sectional view of the sealing ring is provided in the utility model;

[0025] Figure 5 To Figure 4 The local enlarged schematic view of A.

[0026] In the figure, the reference signs are as follows: 1, ring body; 11, outer ring; 12, inner ring; 13, middle part; 2, double sealing part, 21, first lip; 22, second lip; 3, sealing surface; 4, first chamfer; 5, second chamfer; 6, oil groove; 7, lip peak. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0028] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the embodiments, the terms "upper", "lower", "left", "right", and the like orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0032] In one embodiment of the utility model, as shown in Figures 1-5 The sealing ring comprises a ring body 1 and a double sealing part 2. The double sealing part 2 comprises a first lip 21 and a second lip 22, the first lip 21 is symmetrically provided on the outer ring 11 of the ring body 1, the first lip 21 protrudes outward along the radial direction of the ring body 1, the second lip 22 is symmetrically provided on the inner ring 12, and the second lip 22 protrudes along the radial direction of the ring body 1; the distance between the symmetric first lips 21 is greater than the distance between the symmetric second lips 22.

[0033] The sealing ring provided by the utility model constructs a double sealing line through the first lip 21 and the second lip 22, enhances the reliability of sealing, and if slight leakage is found in later use, most of the time only the damaged lip needs to be treated, and the other lip can still maintain basic sealing by virtue of the double protection characteristics, reduces downtime maintenance time, greatly optimizes equipment maintenance process, and far exceeds the practicability of traditional sealing elements. The first lip 21 is symmetrically provided on the outer ring 11 of the ring body 1 and protrudes outward in the radial direction, can block most impurities; the second lip 22 is symmetrically provided on the inner ring 12 of the ring body 1 and protrudes in the radial direction, can tightly fit the connecting part and prevent fluid leakage. The first lip 21 with a larger spacing is in an outward expansion state, the contact area is increased, and most impurities can be intercepted and blocked; the second lip 22 with a smaller spacing has a larger contact area and a larger contact pressure with the connecting part, and the sealing force is improved. The width difference between the inner and outer lips forms a gradient sealing form, and cooperates in layers to ensure that the sealing area is not affected by pollution and leakage.

[0034] Preferably, the first lip 21 protrudes radially outward to form a flat surface, which is the sealing surface 3, for matching the connecting surface and uniformly distributing the contact pressure. In actual working conditions, the sealing surface 3 is used to tightly match the connecting surface, and precisely fits the corresponding connecting component by virtue of its smooth and flat characteristics, thereby achieving a tightly butted effect. When the equipment is in operation and subjected to pressure impact, the sealing surface 3 can uniformly distribute the contact pressure, thereby avoiding excessive concentration of local pressure and buffering the contact pressure, which can not only prevent the sealing surface 3 from being worn and concave due to uneven pressure and causing sealing failure, but also can prevent lubricating oil from leaking in all directions, maintain a stable lubricating environment, and ensure smooth operation of the connecting mechanism.

[0035] Preferably, the second lip 22 protrudes radially outward to form a lip peak 7, which is used to withstand fluctuating pressure in dynamic sealing.

[0036] When the lubricating oil is agitated, it will cause an uneven and dynamic impact force on the lip peak 7 formed by the second lip 22 protruding radially outward. The small contact area of the lip peak 7 will increase the local pressure according to the pressure formula "(P=F / A)" (P is the pressure, F is the pressure, and A is the force area), which can efficiently concentrate and receive the pressure, prevent the oil from breaking through the lip peak 7, avoid the leakage of lubricating oil, and maintain the stability of the lubricating system.

[0037] Preferably, the opposite edges between the symmetrical first lips 21 are chamfered to form a first chamfer 4, and the opposite edges between the symmetrical second lips 22 are chamfered to form a second chamfer 5. The first chamfer 4 and the second chamfer 5 are both based on the radial center axis of the ring body 1, and the angle of the first chamfer 4 is smaller than that of the second chamfer 5.

[0038] From the perspective of assembly convenience, the first chamfer 4 with a smaller angle is located at the first lip 21 of the outer ring 11, which is more conducive to smooth embedding and reduces jamming when the sealing ring is assembled with external connecting components. For example, in the sealing assembly scene of an industrial pump, the mounting hole of the pump shell is matched with the sealing ring, the first chamfer 4 smoothly guides, avoids interference caused by an excessively large angle, and speeds up the assembly process.

[0039] From the perspective of sealing functionality, the second chamfer 5 with a larger angle is located at the second lip 22 of the inner ring 12. When the equipment is in operation and the internal medium is under pressure, the larger angle can help the second lip 22 better adhere to the core component, and the chamfer is used to buffer and uniformly disperse the pressure, thereby strengthening the sealing effect. For example, in the sealing application of a hydraulic oil cylinder piston rod, the piston rod frequently extends and retracts during operation, and the larger angle of the second chamfer 5 assists the sealing ring to firmly adhere, thereby preventing hydraulic oil from leaking.

[0040] Preferably, the ring body 1 narrows from the outer ring 11 to the inner ring 12, which enhances the sealing extrusion and anti-leakage performance. In actual application scenarios, when the ring body 1 is subjected to external pressure, the wider outer ring 11 can first bear a large area of pressure, providing stable support for the overall structure. As the pressure is transmitted to the inner ring 12, the gradually narrowing structure of the ring body 1 causes the pressure to gradually concentrate, and when the pressure finally acts on the inner ring 12, the pressure is significantly enhanced, thereby promoting the inner ring 12 to closely fit the sealed component, increasing the contact pressure, effectively filling the possible micro-pores on the surface of the component, and greatly improving the sealing effect.

[0041] The sealing ring also includes an oil groove 6 arranged on the side of the ring body 1, which is used to guide the flow direction of oil. Taking a car engine as an example, the crankshaft, piston pin and other moving parts operate at high speed and frequently rub against each other. The oil groove 6 of the sealing ring will follow the established path and allow lubricating oil to flow through these key parts in turn, ensuring full lubrication throughout the process and avoiding excessive wear caused by oil deficiency, thereby effectively maintaining the good working condition of each component of the engine and prolonging the overall service life.

[0042] In this embodiment, the oil groove 6 can be symmetrically recessed on the side of the ring body 1, so that the ring body 1 is more uniform and balanced when subjected to force.

[0043] Specifically, the inner wall width of the oil groove 6 expands from the axial inside to the axial outside of the ring body 1. The oil groove 6 is used to uniformly distribute oil and buffer oil pressure. Oil may enter the oil groove 6 of the sealing ring from the outside of the corresponding oil groove 6. The wider outside portion can first preliminarily distribute and buffer the oil, and then guide the oil to the tiny gap near the rotating shaft or other moving parts through the gradually narrowing inside portion, thereby achieving uniform oil distribution.

[0044] Preferably, the outer ring 11 is made of wear-resistant material, such as polyurethane material. The wear-resistant outer ring 11 is used to resist external friction and wear. Polyurethane material has excellent wear resistance, hardness and toughness. In the process of continuous friction with external components, it can effectively reduce the loss of surface material and maintain the integrity of the structure of the outer ring 11 by virtue of its own characteristics. Even if exposed to a high-intensity friction environment for a long time, it is not easy to appear scratches, damage and other situations, thereby ensuring the overall sealing performance and service life of the sealing ring.

[0045] Preferably, the inner ring 12 is made of soft and good sealing material, such as nitrile rubber. The inner ring 12 is used to directly contact the sealing medium to ensure good initial sealing effect. Nitrile rubber is soft, and when it fits the component that contacts the sealing medium, it can well conform to the shape change of the component surface by virtue of its flexibility. Whether it is a flat surface or an irregular surface with a slight arc or concave-convex, it can be closely fitted to minimize the sealing gap.

[0046] Preferably, the middle part 13 of the ring body 1 is made of a material with strength, such as fiber reinforced plastic, which is used to enhance the compression resistance of the sealing ring, preventing the sealing ring from deforming excessively under high pressure and losing the sealing function. The fiber material has high tensile strength and can bear a large part of the tension when stressed; while the plastic matrix can well bond the fiber material together, and itself also has certain compression resistance and deformation resistance. The two complement each other, so that the fiber reinforced plastic as a whole presents high strength and good rigidity, improving the service life effect of the sealing ring.

[0047] In the present embodiment, the outer ring 11, the inner ring 12 and the middle part 13 can be bonded to form the ring body 1 by vulcanization bonding method and hot pressing process, and the specific connection mode can also be adjusted according to the equipment basis of the enterprise.

[0048] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiment with equivalent changes is also within the scope of the present application. Any simple modification, equivalent change and modification of the above embodiment within the scope of the present application are also within the scope of the present application.

Claims

1. A seal ring, characterized by, Comprising: a ring body; a double sealing part, comprising a first lip and a second lip, the first lip is symmetrically protruded on the outer ring of the ring body, the first lip protrudes radially outward, the second lip is symmetrically protruded on the inner ring, the second lip protrudes radially; the distance between the symmetric first lips is greater than the distance between the symmetric second lips.

2. The seal ring of claim 1, wherein The first lip protrudes radially outward to form a flat surface, which is a sealing surface, used to match the connecting surface and evenly distribute the contact pressure.

3. A seal ring according to claim 1 or 2, characterised in that The opposite edges between the symmetric first lips are chamfered to form a first chamfer, and the opposite edges between the symmetric second lips are chamfered to form a second chamfer, both of which are based on the radial center axis of the ring body, the angle of the first chamfer is smaller than the angle of the second chamfer.

4. The seal ring of claim 1 or 2, wherein It also includes an oil groove, which is arranged on the side of the ring body, and is used to guide the flow direction of the oil.

5. A seal ring according to claim 4, wherein The inner wall width of the oil groove expands from the axial inside to the axial outside of the ring body, which is used to evenly distribute the oil and buffer the oil pressure.

6. The seal ring of claim 1 or 2, wherein The width of the ring body from the outer ring to the inner ring is contracted, which is used to enhance the sealing extrusion and prevent leakage.

7. The seal ring of claim 1 or 2, wherein The second lip protrudes radially outward to form a lip peak, which is used to withstand fluctuating pressure in dynamic sealing.

8. The seal ring of claim 1 or 2, wherein The outer ring is made of wear-resistant material, which is used to resist external friction and wear.

9. The seal ring of claim 1 or 2, wherein The inner ring is made of soft and good sealing material, which is used to directly contact the sealing medium.

10. The seal ring of claim 1 or 2, wherein The middle part of the ring body is made of material with strength, which is used to enhance the pressure resistance of the sealing ring and prevent the sealing ring from deforming excessively under high pressure and losing sealing function.

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