Bearing sealing ring and sealing structure

Abstract

A bearing sealing ring and a sealing structure belong to the field of bearing sealing. The invention solves the technical problems of increased temperature rise and low limit speed of the bearing due to the tight contact position in the RS sealing form of the bearing. The sealing ring upper portion comprises an oil sealing lip, a guide face is arranged on the inner side of the top of the oil sealing lip, a pressure reducing groove is formed in the outer side of the top of the oil sealing lip, the sealing ring lower portion comprises a supporting portion, an inner side sealing lip and an outer side sealing lip, the supporting portion is arranged on the lower surface of the sealing ring lower portion, and the inner side sealing lip is arranged on the lower left side of the supporting portion. The outer side sealing lip is arranged on the lower right side of the supporting part, a first gap is formed between the lower surface of the lower portion of the sealing ring and the surface of the inner ring, sealing grooves are formed in the outer ring and the inner ring in the circumferential direction, the oil sealing lip is in interference fit with the sealing groove of the outer ring, and the inner side sealing lip is in interference fit with the sealing groove of the inner ring. A second gap is formed between the outer side sealing lip and the surface of the inner ring. The temperature rise of the bearing is reduced, the installation is more convenient, and the bearing sealing device is used for bearing sealing.

Description

Technical Field

[0001] The invention relates to a bearing sealing ring and a sealing structure, belonging to the field of bearing sealing. Background Art

[0002] In order to prevent the leakage of lubricant and the intrusion of dust, cutting particles and other impurities and water, the bearing is equipped with a sealing device to maintain good lubrication conditions and a normal working environment for the bearing. The sealing device has a great task in maintaining the operating performance and durability of the bearing. The contact seal is generally in direct contact with the mating parts, which can prevent the intrusion of solid impurities and water, and the loss of lubricant. The sealing pressure can come from the elastic restoring force of the sealing material, or from the design interference between the seal and the sealing contact surface.

[0003] RS seal has better sealing effect. This seal structure is double lip seal. Contact seal can generally provide extremely reliable seal. It generates large friction heat during operation, and the contact surface is easy to wear. The friction of the sealing surface and the resulting temperature rise are the disadvantages of this type of seal. Therefore, contact seal can only be used in occasions below a certain rotation speed. RS seal has a tight contact position, which increases the bearing temperature rise and has a low limit speed.

[0004] In summary, the RS seal type of bearing has technical problems such as increased bearing temperature rise and low limit speed due to the tight contact position. Summary of the invention

[0005] The present invention aims to solve the technical problems that the RS seal form of the bearing has the problem of increased bearing temperature rise and low limit speed due to the tight contact position, and further provides a bearing sealing ring and a sealing structure.

[0006] The technical solution of the present invention is a bearing sealing ring, comprising a sealing ring upper part and a sealing ring lower part;

[0007] The upper part of the sealing ring includes an oil sealing lip, a guide surface is arranged on the inner side of the top of the oil sealing lip, and a pressure relief groove is arranged on the outer side of the top of the oil sealing lip. The lower part of the sealing ring includes a supporting part, an inner sealing lip and an outer sealing lip. The supporting part is arranged on the lower surface of the lower part of the sealing ring, the inner sealing lip is arranged on the lower left side of the supporting part, and the outer sealing lip is arranged on the lower right side of the supporting part.

[0008] As another improvement of the present invention, the guiding surface is an inclined surface, and the shape of the inclined surface is used to guide the installation of the sealing ring.

[0009] As another improvement of the present invention, the pressure relief groove is an arc-shaped groove, and the arc-shaped groove is used to increase the deformation amount of the sealing ring.

[0010] A bearing sealing structure, comprising an outer ring, an inner ring, a roller, a retaining frame and a bearing sealing ring according to claim 1;

[0011] A first gap is provided between the lower surface of the lower part of the sealing ring and the surface of the inner ring, and the size of the first gap is F. Sealing grooves are provided in the circumferential direction of the outer ring and the inner ring. The oil sealing lip has an interference fit with the sealing groove of the outer ring, and the inner sealing lip has an interference fit with the sealing groove of the inner ring. A second gap is provided between the outer sealing lip and the surface of the inner ring, and the size of the second gap is E.

[0012] As another improvement of the present invention, the oil sealing lip is provided with a first interference amount A vertically upward and a second interference amount B horizontally outward.

[0013] As another improvement of the present invention, the size range of the first interference amount A is 0.05 mm to 0.1 mm, and the size range of the second interference amount B is 0.04 mm to 0.07 mm.

[0014] As another improvement of the present invention, the inner sealing lip is provided with a third interference amount C vertically downward and a fourth interference amount D horizontally inward, the size range of the third interference amount C is 0.15mm to 0.4mm, and the size range of the fourth interference amount D is 0.04mm to 0.1mm.

[0015] As another improvement of the present invention, the size F of the first gap ranges from 0.1 mm to 0.25 mm.

[0016] As another improvement of the present invention, the size E of the second gap ranges from 0.025 mm to 0.05 mm.

[0017] Beneficial effects of the present invention:

[0018] 1. The upper part of a bearing sealing ring of the present invention includes an oil sealing lip, a guide surface is provided on the inner side of the top of the oil sealing lip, and a pressure relief groove is provided on the outer side of the top of the oil sealing lip. The guiding operation before the installation of the sealing ring is facilitated by providing the guide surface. During installation, due to the deformation of the pressure relief groove, the upper part of the sealing ring including the oil sealing lip is more easily inserted into the sealing groove of the outer ring, thereby making the installation more convenient.

[0019] 2. A second gap is provided between the outer sealing lip of the lower part of the sealing ring of a bearing sealing structure of the present invention and the inner ring surface. The second gap reduces the tightness between the lower part of the sealing ring and the outer ring of the bearing, reduces the temperature rise of the bearing, and increases the limit speed of the bearing.

[0020] 3. The size range of the third interference amount C is 0.15mm to 0.4mm, and the size range of the fourth interference amount D is 0.04mm to 0.1mm, the purpose is to prevent grease leakage.

[0021] 4. The size E of the second gap ranges from 0.025mm to 0.05mm, so that there is a certain gap between the right sealing lip and the outer ring, which can make the right sealing lip and the outer ring appropriately tight, while reducing the temperature rise of the bearing. The right sealing lip plays a role in dust prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of a bearing sealing structure of the present invention.

[0023] Figure 2 It is an overall schematic diagram of a bearing sealing ring of the present invention.

[0024] Figure 3 It is a schematic diagram of the upper structure of the sealing ring.

[0025] Figure 4 It is a schematic diagram of the lower structure of the sealing ring. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be explained that the positional relationships indicated by the terms "upper", "lower", "left", "right", "first", "second", etc. are only based on the positional relationships of the orientations shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the referred components have specific orientations, are constructed and operated in specific orientations, and therefore cannot be understood as limitations on the present invention.

[0027] Specific implementation method 1: Combination Figures 1 to 4 The present embodiment is described. The present embodiment is a bearing seal ring, characterized in that it comprises a seal ring upper portion and a seal ring lower portion;

[0028] The upper part of the sealing ring includes an oil sealing lip 8, a guide surface 6 is arranged on the inner side of the top of the oil sealing lip 8, and a pressure relief groove 7 is arranged on the outer side of the top of the oil sealing lip 8. The lower part of the sealing ring includes a support portion 9, an inner sealing lip 10 and an outer sealing lip 11. The support portion 9 is arranged on the lower surface of the lower part of the sealing ring, the inner sealing lip 10 is arranged on the lower left side of the support portion 9, and the outer sealing lip 11 is arranged on the lower right side of the support portion 9.

[0029] The purpose of the oil sealing lip on the upper part of the sealing ring is to prevent grease leakage, the purpose of the inner sealing lip on the lower part of the sealing ring is to prevent grease leakage, and the purpose of the outer sealing lip on the lower part of the sealing ring is to prevent dust. In order to prevent impurities from entering the bearing and causing bearing damage, the upper part of the sealing ring is designed as a single oil sealing lip for easy installation. The overall design of the sealing ring makes installation easy while preventing impurities from entering the bearing and causing bearing damage.

[0030] Specific implementation method 2: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the guide surface 6 is an inclined surface. The guide surface is provided to facilitate the guiding operation before the sealing ring is installed. The shape of the inclined surface is used to guide the installation of the sealing ring and the inclined surface shape is easy to process, convenient to process, and low in cost. The other components and connection methods are the same as those of the first embodiment.

[0031] Specific implementation method three: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the pressure relief groove 7 is an arc-shaped groove, which is used to increase the deformation of the sealing ring. During installation, due to the deformation of the pressure relief groove, the upper part of the sealing ring including the oil sealing lip is easier to be inserted into the sealing groove of the outer ring, thereby making installation more convenient. Other components and connection methods are the same as those of the first or second embodiment.

[0032] Specific implementation method four: Combination Figures 1 to 4 This embodiment is described. This embodiment is a bearing sealing structure, which includes an outer ring 1, an inner ring 2, a roller 3, a cage 4 and a bearing sealing ring described in the specific embodiment 1;

[0033] A first gap is provided between the lower surface of the lower part of the sealing ring and the surface of the inner ring 2, and the size of the first gap is F. Sealing grooves are provided in the circumferential direction of the outer ring 1 and the inner ring 2, the oil sealing lip 8 has an interference fit with the sealing groove of the outer ring 1, the inner sealing lip 10 has an interference fit with the sealing groove of the inner ring 2, and a second gap is provided between the outer sealing lip 11 and the surface of the inner ring 2, and the size of the second gap is E.

[0034] The inner sealing lip 10 has an interference fit with the sealing groove of the inner ring 2 to prevent grease leakage; a second gap is provided between the outer sealing lip and the surface of the inner ring. By providing the second gap, the tightness between the lower part of the sealing ring and the outer ring of the bearing is reduced, the temperature rise of the bearing is reduced, and the maximum speed of the bearing is increased.

[0035] Specific implementation method five: Combination Figures 1 to 4This embodiment is described. The difference between this embodiment and the first embodiment is that the oil sealing lip 8 is provided with a first interference amount A vertically upward and a second interference amount B horizontally outward. The interference amounts in two directions are provided at the same time to make the installation more stable and reliable. The other components and connection methods are the same as those in the fourth embodiment.

[0036] Specific implementation method six: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the size range of the first interference amount A is 0.05mm to 0.1mm, and the size range of the second interference amount B is 0.04mm to 0.07mm. The interference amounts in two directions are set at the same time, the purpose is to make the installation more stable and reliable. After testing, the installation effect is more stable when using the above size range. At the same time, the above size range can adapt to more sealing groove sizes, and other components and connection methods are the same as those of the fourth or fifth embodiment.

[0037] Specific implementation method seven: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the inner sealing lip 10 is provided with a third interference amount C vertically downward and a fourth interference amount D horizontally inward. The size range of the third interference amount C is 0.15mm to 0.4mm, and the size range of the fourth interference amount D is 0.04mm to 0.1mm. After testing, the installation effect is more stable when the above size range is adopted. The other components and connection methods are the same as any one of the fourth to sixth embodiments.

[0038] Specific implementation method eight: Combination Figures 1 to 4 The present embodiment is described as follows. The present embodiment is different from the fourth embodiment in that the size F of the first gap is in the range of 0.1 mm to 0.25 mm. The other components and connection methods are the same as any one of the fourth to seventh embodiments.

[0039] Specific implementation method nine: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the size E of the second gap ranges from 0.025 mm to 0.05 mm. After testing, the installation tightness is moderate and the dustproof effect is good after adopting the above size range. The other components and connection methods are the same as any one of the fourth to eighth embodiments.

[0040] Combination Figures 1 to 4 The working principle of the present invention is described:

[0041] There is a second gap between the outer sealing lip and the inner ring surface. With a certain gap, the installation tightness is greatly improved and the temperature rise is also controlled to a certain extent. Through the good control of the size F of the inner sealing lip and the first gap, it can be well guaranteed that the bearing does not leak grease, and the size E of the second gap plays a role in dust prevention. At the same time, there are interference fits in two directions on the upper part of the sealing ring, which makes the sealing ring more firmly installed on the ring. Because of the role of the guide surface and the pressure relief groove, it is also more convenient to install.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bearing seal ring, characterized in that It includes a sealing ring upper part and a sealing ring lower part; The upper portion of the sealing ring comprises an oil sealing lip (8), a guide surface (6) is arranged on the inner side of the top of the oil sealing lip (8), and a pressure relief groove (7) is arranged on the outer side of the top of the oil sealing lip (8). The lower portion of the sealing ring comprises a support portion (9), an inner sealing lip (10) and an outer sealing lip (11), wherein the support portion (9) is arranged on the lower surface of the lower portion of the sealing ring, the inner sealing lip (10) is arranged on the lower left side of the support portion (9), and the outer sealing lip (11) is arranged on the lower right side of the support portion (9).

2. A bearing sealing ring according to claim 1, characterized in that: The guiding surface (6) is an inclined surface, and the shape of the inclined surface is used to guide the installation of the sealing ring.

3. A bearing sealing ring according to claim 1, characterized in that: The pressure relief groove (7) is an arc-shaped groove, and the arc-shaped groove is used to increase the deformation amount of the sealing ring.

4. A bearing sealing structure, characterized in that It comprises an outer ring (1), an inner ring (2) and a bearing sealing ring as claimed in claim 1; A first gap is provided between the lower surface of the lower part of the sealing ring and the surface of the inner ring (2), the size of the first gap being F, sealing grooves are provided in the circumferential direction of the outer ring (1) and the inner ring (2), the oil sealing lip (8) is interference fit with the sealing groove of the outer ring (1), the inner sealing lip (10) is interference fit with the sealing groove of the inner ring (2), and a second gap is provided between the outer sealing lip (11) and the surface of the inner ring (2), the size of the second gap being E.

5. A bearing sealing structure according to claim 4, characterized in that: The oil sealing lip (8) is provided with a first interference amount A vertically upward and a second interference amount B horizontally outward.

6. A bearing sealing structure according to claim 5, characterized in that: The size range of the first interference amount A is 0.05mm to 0.1mm, and the size range of the second interference amount B is 0.04mm to 0.07mm.

7. A bearing sealing structure according to claim 4, characterized in that: The inner sealing lip (10) is provided with a third interference amount C vertically downward and a fourth interference amount D horizontally inward, the size range of the third interference amount C is 0.15 mm to 0.4 mm, and the size range of the fourth interference amount D is 0.04 mm to 0.1 mm.

8. A bearing sealing structure according to claim 4, characterized in that: The dimension F of the first gap ranges from 0.1 mm to 0.25 mm.

9. A bearing sealing structure according to claim 4, characterized in that: The dimension E of the second gap ranges from 0.025 mm to 0.05 mm.

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