Dual band secondary lip composite oil seal

Abstract

The application provides a double-side-band auxiliary lip composite oil seal, which comprises an outer ring and an inner ring arranged coaxially, the outer ring is provided with an outer auxiliary lip extending to the inner ring, the outer auxiliary lip is annular and in sealing contact with the outer circumferential side of the inner ring, and a first annular grease cavity is formed between the outer circumferential side of the inner ring and the outer auxiliary lip; the inner ring is provided with an inner auxiliary lip extending to the outer ring, the inner auxiliary lip is annular and in sealing contact with the inner circumferential side of the outer ring, and a second annular grease cavity is formed between the inner circumferential side of the outer ring and the inner auxiliary lip. According to the application, the inner ring and the outer ring can rotate relative to each other, the relative rotation between the rotating shaft and the shaft hole is replaced, and the gap erosion between the rotating shaft and the oil seal is avoided; the outer auxiliary lip, the inner auxiliary lip and the grease cavities formed by the outer auxiliary lip and the inner auxiliary lip can effectively isolate the external dust impurities and the particle pollutants in the internal lubricating oil, and the pollution erosion caused by the oil seal is avoided; the sealing effect is improved, and the abrasion is small.

Description

Technical Field

[0001] This invention relates to the field of oil seal technology, and specifically to a composite oil seal with a double-sided secondary lip. Background Technology

[0002] Agricultural harvesting machinery operates in dusty and complex environments. Dust and impurities outside the gearbox, along with particulate contaminants in the lubricating oil inside, contaminate and corrode the oil seals, easily damaging their sealing performance and leading to frequent lubricating oil leaks during use. These malfunctions necessitate machine shutdown for repairs, severely impacting grain harvesting progress. Summary of the Invention

[0003] The technical problem to be solved by this invention is: how to improve the sealing performance of oil seals and prevent external dust and impurities and particulate contaminants in internal lubricating oil from jointly causing pollution and corrosion to the oil seals.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0005] This invention provides a double-sided composite oil seal with auxiliary lips, comprising an outer ring and an inner ring arranged coaxially. The outer ring has an outer auxiliary lip extending towards the inner ring. The outer auxiliary lip is annular and seals against the outer periphery of the inner ring. An annular first grease cavity is formed between the outer periphery of the inner ring and the outer auxiliary lip. The inner ring has an inner auxiliary lip extending towards the outer ring. The inner auxiliary lip is annular and seals against the inner periphery of the outer ring. An annular second grease cavity is formed between the inner periphery of the outer ring and the inner auxiliary lip.

[0006] The beneficial effects of this invention are:

[0007] Using this invention, the inner and outer rings can rotate relative to each other, replacing the relative rotation between the rotating shaft and the shaft hole, thus avoiding erosion of the gap between the rotating shaft and the oil seal. Through the outer and inner auxiliary lips and the grease cavity they form, external dust and impurities and particulate contaminants in the internal lubricating oil can be effectively isolated, preventing impurities and particulate contaminants from contaminating and eroding the oil seal together. This improves the sealing effect and reduces wear. In addition, the impact of contaminant accumulation on the sealing parts can be eliminated by adding or replacing grease, making maintenance convenient.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, one end of the inner ring is provided with an outward flange, the side of the outward flange facing the outer ring is in sealing contact with the outer auxiliary lip, and the side of the outward flange facing the outer ring and the outer auxiliary lip together form an annular third grease cavity.

[0010] The path for impurities to enter the oil seal is extended, and an end face seal is formed between the outer flange and the outer secondary lip, while a axial face seal is formed between the outer secondary lip and the inner ring. The sealing effect is improved through the composite sealing of the end face and the axial face. In addition, the third grease chamber provides isolation and protection for the first grease chamber, thereby improving the sealing effect and service life.

[0011] Furthermore, one end of the outer ring is provided with an inner flange, and the outer flange and the inner flange at least partially overlap in the axial direction of the inner ring, and the outer secondary lip is fixed on the inner flange.

[0012] This improves the stability of the outer accessory lip, preventing friction fluctuations and increased grease wear caused by the vibration of the outer accessory lip.

[0013] Furthermore, the outer lip is provided with multiple annular protrusions, at least one annular protrusion contacts the outer peripheral side of the inner ring, and at least two annular protrusions contact the end face of the outer flange; a third grease cavity is formed between each pair of adjacent annular protrusions.

[0014] The flexibility of the contact area between the outer lip and the outer flange is improved. Combined with multiple third grease cavities, friction is reduced, the sealing and isolation effect is improved, and the service life is long.

[0015] Furthermore, the outer flange edge is also provided with a turning part facing the inner flange, and a fourth grease cavity is formed between the inner peripheral side of the turning part and the outer secondary lip.

[0016] The turning part limits the annular protrusion, improving the sealing of the first and third grease chambers, reducing grease loss, and improving continuous lubrication performance; at the same time, the fourth grease chamber adds isolation protection, improving the sealing effect and service life of the oil seal.

[0017] Furthermore, the outer lip is also provided with a secondary lip sealing ring, which is arranged around the outer periphery of the turning part and is fixedly connected to the outer ring.

[0018] This facilitates improved sealing of the fourth grease chamber, reduces grease loss, and enhances continuous lubrication and sealing performance.

[0019] Furthermore, a stabilizing ring is provided between the outer ring and the inner ring, and the outer secondary lip is fixedly connected to the stabilizing ring.

[0020] Improving the stability of the outer lip facilitates uniform contact between the outer lip and the outer periphery of the inner ring, reducing vibration and wear caused by deformation of the outer lip.

[0021] Furthermore, a groove is provided on the outer periphery of the inner ring opposite the stabilizing ring, and the outer secondary lip extends into the groove.

[0022] Improve the sealing performance of the first grease cavity, reduce grease loss, and enhance continuous lubrication and sealing effect.

[0023] Furthermore, the other end of the inner ring is provided with a secondary lip support extending directly outward from the outer ring, and the inner secondary lip is fixed to the secondary lip support.

[0024] The secondary lip support facilitates the support of the anti-fouling inner secondary lip, improves the stability of the inner secondary lip, and avoids friction fluctuations and accelerated grease loss caused by the vibration of the inner secondary lip.

[0025] Furthermore, the inner lip has at least two annular flexible lips on one side of the outer ring, and a second grease cavity is formed between each pair of adjacent flexible lips; a sealing layer is also provided on the inner circumference of the inner ring.

[0026] The flexible lip increases the flexibility of the contact area between the inner secondary lip and the outer ring, reducing wear; during installation, the sealing layer can improve the sealing between the inner ring and the rotating shaft, preventing impurities from entering the gaps. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 for Figure 1 Detailed drawing of Part A.

[0029] In the accompanying drawings, the technical features represented by each reference numeral are as follows:

[0030] 1-Outer ring; 2-Inner ring; 3-Outer secondary lip; 4-Inner secondary lip; 5-First grease cavity; 6-Second grease cavity; 7-Outer flange; 8-Third grease cavity; 9-Inner flange; 10-Annular protrusion; 11-Turnover; 12-Fourth grease cavity; 13-Secondary lip sealing ring; 14-Stabilizing ring; 15-Groove; 16-Secondary lip support; 17-Flexible lip edge; 18-Sealing layer. Detailed Implementation

[0031] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0032] See this invention Figure 1-2 .

[0033] This invention provides a double-sided composite oil seal with auxiliary lips, comprising an outer ring 1 and an inner ring 2 arranged coaxially. The outer ring 1 is provided with an outer auxiliary lip 3 extending towards the inner ring 2. The outer auxiliary lip 3 is annular and seals against the outer periphery of the inner ring 2. An annular first grease cavity 5 is formed between the outer periphery of the inner ring 2 and the outer auxiliary lip 3. The inner ring 2 is provided with an inner auxiliary lip 4 extending towards the outer ring 1. The inner auxiliary lip 4 is annular and seals against the inner periphery of the outer ring 1. An annular second grease cavity 6 is formed between the inner periphery of the outer ring 1 and the inner auxiliary lip 4.

[0034] principle:

[0035] During installation, the outer ring 1 is positioned within the shaft hole of the moving equipment (such as a gearbox), and the inner ring 2 is fitted onto the rotating shaft. The inner ring 2 and outer ring 1 can rotate relative to each other. During operation, the rotating shaft drives the inner ring 2 to rotate, causing the outer lip 3 to engage with the inner ring 2, and the inner lip 4 to engage with the outer ring 1. This effectively isolates external dust and other foreign matter, as well as particulate contaminants from the internal lubricating oil, preventing the mixing of external foreign matter and internal contaminants from corroding the oil seal. Grease can lubricate the contact areas between the outer lip 3 and the inner ring 2, and between the inner lip 4 and the outer ring 1, enhancing the seal and reducing wear. After a period of use, maintenance can be performed by adding or replacing grease to eliminate the impact of contaminant accumulation on the sealing areas.

[0036] In summary, by employing this invention, the inner ring 2 and the outer ring 1 can rotate relative to each other, replacing the relative rotation between the rotating shaft and the shaft hole, thus avoiding erosion of the gap between the rotating shaft and the oil seal. Through the outer secondary lip 3 and the inner secondary lip 4 and the grease cavity they form, external dust and impurities and particulate contaminants in the internal lubricating oil can be effectively isolated, preventing impurities and particulate contaminants from contaminating and eroding the oil seal together. This improves the sealing effect and reduces wear. Furthermore, by adding or replacing grease, the impact of contaminant accumulation on the sealing parts can be eliminated, making maintenance convenient.

[0037] Furthermore, one end of the inner ring 2 is provided with an outer flange 7, the side of the outer flange 7 facing the outer ring 1 is in sealing contact with the outer auxiliary lip 3, and the side of the outer flange 7 facing the outer ring 1 and the outer auxiliary lip 3 together form an annular third grease cavity 8.

[0038] The path for impurities to enter the oil seal is extended, and an end face seal is formed between the outer flange 7 and the outer secondary lip 3, and a axial face seal is formed between the outer secondary lip 3 and the inner ring 2. The sealing effect is improved through the composite sealing of the end face and the axial face. In addition, the third grease cavity 8 provides isolation and protection for the first grease cavity 5, thereby improving the sealing effect and service life.

[0039] Furthermore, one end of the outer ring 1 is provided with an inner flange 9, and the outer flange 7 and the inner flange 9 at least partially overlap in the axial direction of the inner ring 2, and the outer secondary lip 3 is fixed on the inner flange 9.

[0040] This improves the stability of the outer auxiliary lip 3, avoiding friction fluctuations and accelerated grease loss caused by the vibration of the outer auxiliary lip 3.

[0041] Furthermore, the outer lip 3 is provided with multiple annular protrusions 10, at least one annular protrusion 10 is in contact with the outer peripheral side of the inner ring 2, and at least two annular protrusions 10 are in contact with the end face of the outer flange 7; a third grease cavity 8 is formed between each pair of adjacent annular protrusions 10.

[0042] The flexibility of the contact area between the outer secondary lip 3 and the outer flange 7 is improved. Combined with multiple third grease cavities 8, friction is reduced and the sealing and isolation effect is improved, resulting in a long service life.

[0043] Furthermore, the outer flange 7 is provided with a turning part 11 facing the inner flange 9, and the inner circumferential side of the turning part 11 and the outer secondary lip 3 together form a fourth grease cavity 12.

[0044] The turning part 11 limits the annular protrusion 10, improves the sealing of the first grease cavity 5 and the third grease cavity 8, reduces grease loss, and improves continuous lubrication performance; at the same time, the fourth grease cavity 12 adds isolation protection, improving the sealing effect and service life of the oil seal.

[0045] Furthermore, the outer lip 3 is also provided with a secondary lip sealing ring 13, which is arranged around the outer periphery of the turning part 11 and is fixedly connected to the outer ring 1.

[0046] It facilitates the improvement of the sealing performance of the fourth grease cavity 12, reduces grease loss, and improves the continuous lubrication and sealing effect; during installation, the secondary lip sealing ring 13 can improve the sealing performance between the oil seal and the shaft hole.

[0047] Furthermore, a stabilizing ring 14 is provided between the outer ring 1 and the inner ring 2, and the outer secondary lip 3 is fixedly connected to the stabilizing ring 14.

[0048] To improve the stability of the outer lip 3, it is easier to make the outer lip 3 and the outer periphery of the inner ring 2 in uniform contact, thereby reducing the vibration and wear caused by the deformation of the outer lip 3.

[0049] Furthermore, a groove 15 is provided on the outer periphery of the inner ring 2, which is opposite to the stabilizing ring 14, and the outer secondary lip 3 extends into the groove 15.

[0050] Improve the sealing performance of the first grease cavity 5, reduce grease loss, and enhance the continuous lubrication and sealing effect.

[0051] Furthermore, the other end of the inner ring 2 is provided with a secondary lip support 16 extending directly outward from the outer ring 1, and the inner secondary lip 4 is fixed on the secondary lip support 16.

[0052] The secondary lip support 16 facilitates the support of the anti-fouling inner secondary lip 4, improves the stability of the inner secondary lip 4, and avoids friction fluctuations and accelerated grease loss caused by the vibration of the inner secondary lip 4.

[0053] Furthermore, the inner secondary lip 4 is provided with at least two annular flexible lips 17 on one side of the outer ring 1, and the second grease cavity 6 is formed between each two adjacent flexible lips 17; the inner circumference of the inner ring 2 is also provided with a sealing layer 18.

[0054] The flexible lip 17 increases the flexibility of the contact area between the inner secondary lip 4 and the outer ring 1, reducing wear; during installation, the sealing layer 18 can improve the sealing between the inner ring 2 and the rotating shaft, preventing impurities from entering the gap.

[0055] In the description of this invention, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this invention and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0056] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this invention, when descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixation," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixation" can refer to integral fixation or detachable fixation using fasteners; it can be direct fixation or fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this invention can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0058] In this invention, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this invention can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0059] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application.

Claims

1. A composite oil seal with a double-sided secondary lip, characterized in that: The device includes an outer ring (1) and an inner ring (2) arranged coaxially. The outer ring (1) is provided with an outer lip (3) extending toward the inner ring (2). The outer lip (3) is annular and seals against the outer periphery of the inner ring (2). The outer periphery of the inner ring (2) and the outer lip (3) together form an annular first grease cavity (5). The inner ring (2) is provided with an inner lip (4) extending toward the outer ring (1). The inner lip (4) is annular and seals against the inner periphery of the outer ring (1). The inner periphery of the outer ring (1) and the inner lip (4) together form an annular second grease cavity (6). One end of the inner ring (2) is provided with an outer flange (7), the side of the outer flange (7) facing the outer ring (1) is in sealed contact with the outer auxiliary lip (3), and the side of the outer flange (7) facing the outer ring (1) and the outer auxiliary lip (3) together form an annular third grease cavity (8). One end of the outer ring (1) is provided with an inner flange (9), the outer flange (7) and the inner flange (9) at least partially overlap in the axial direction of the inner ring (2), and the outer secondary lip (3) is fixed on the inner flange (9); The outer flange (7) is also provided with a turning part (11) facing the inner flange (9), and a fourth grease cavity (12) is formed between the inner circumference of the turning part (11) and the outer secondary lip (3). The outer lip (3) is also provided with a lip sealing ring (13), which is arranged around the outer periphery of the turning part (11) and is fixedly connected to the outer ring (1). The other end of the inner ring (2) is provided with a secondary lip support (16) extending directly outward from the outer ring (1), and the inner secondary lip (4) is fixed on the secondary lip support (16).

2. The composite oil seal with dual sides and auxiliary lip according to claim 1, characterized in that: The outer lip (3) is provided with multiple annular protrusions (10), at least one annular protrusion (10) is in contact with the outer peripheral side of the inner ring (2), and at least two annular protrusions (10) are in contact with the end face of the outer flange (7); a third grease cavity (8) is formed between each pair of adjacent annular protrusions (10).

3. The double-sided composite oil seal with a secondary lip according to claim 1, characterized in that: A stabilizing ring (14) is provided between the outer ring (1) and the inner ring (2), and the outer lip (3) is fixedly connected to the stabilizing ring (14).

4. The double-sided composite oil seal with a secondary lip according to claim 3, characterized in that: The outer periphery of the inner ring (2) is provided with a groove (15) facing the stabilizing ring (14), and the outer lip (3) extends into the groove (15).

5. The composite oil seal with dual sides and auxiliary lip according to claim 1, characterized in that: The inner lip (4) has at least two annular flexible lips (17) on one side of the outer ring (1), and a second grease cavity (6) is formed between each two adjacent flexible lips (17); a sealing layer (18) is also provided on the inner circumference side of the inner ring (2).

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