Non-contact sealing ring and non-contact sealing bearing
By designing a labyrinthine channel and vortex space in the non-contact sealing ring, the problem of insufficient sealing performance of conventional sealing rings in harsh environments is solved, achieving better sealing effect and anti-pollution capability.
Patent Information
- Application Number
- CN202520147812.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Conventional non-contact seals are difficult to meet the requirements for extremely high sealing performance in environments with normal temperature, low to medium speed and some dust, and are prone to problems such as grease leakage and internal bearing contamination.
A non-contact sealing ring was designed. By forming a labyrinthine channel and vortex space between the two sides of the non-contact lip and the inner sealing groove, the sealing path is extended, the gas flow is slowed down, and grease leakage is prevented by utilizing the channel structure between the grease-blocking lip, the dust-proof lip and the inner sealing groove.
It effectively reduces grease leakage in harsh environments, avoids internal bearing contamination, and improves sealing performance.
Smart Images
Figure CN223536780U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing technology, and in particular to a non-contact sealing ring and a non-contact sealed bearing. Background Technology
[0002] Conventional non-contact seals can be used in most situations and in normal environments, such as normal temperature, low to medium speed, relatively clean environment, or ordinary situations inside motors. However, they are not suitable for situations where they are at normal temperature, low to medium speed, have some dust, require longer resistance to contamination, and require low torque. Due to their simple structure, they often leak grease or become contaminated inside the bearing, making it difficult to meet extremely high sealing performance requirements. Summary of the Invention
[0003] The purpose of this invention is to provide a non-contact sealing ring and a non-contact sealing bearing, which can solve the technical problems mentioned in the background art.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A non-contact sealing ring includes a sealing ring body and a skeleton disposed within the sealing ring body. The outer edge of the sealing ring body is installed at the outer sealing groove of the outer ring of the bearing, and the inner edge of the sealing ring body is installed at the inner sealing groove of the inner ring of the bearing. A connecting portion extends downward from the middle of the inner edge of the sealing ring body. A non-contact lip protrudes inward from the lower end of the connecting portion. The non-contact lip extends into the inner sealing groove, and a first channel is formed between the inner surface of the non-contact lip and the side wall of the inner sealing groove. A second channel is formed between the lower end surface of the non-contact lip and the bottom wall of the inner sealing groove, which is connected to the first channel.
[0005] The inner side of the inner edge of the sealing ring body is provided with a grease-blocking lip that protrudes inward and is located above the inner side of the non-contact lip. The lower surface of the grease-blocking lip is lower than the inner side wall end face of the inner sealing groove, and a third channel is formed between the inner side surface of the grease-blocking lip and the side wall of the inner sealing groove. The lower surface of the grease-blocking lip, the inner side surface of the connecting part, the upper surface of the non-contact lip, and the side wall of the inner sealing groove form a first space. The first channel and the third channel are both connected to the first space, and the width of the first channel and the third channel are both smaller than the width of the first space. After the grease enters the large first space through the narrow third channel, it forms a vortex to reduce the grease from flowing out of the first channel.
[0006] The outer side of the inner edge of the sealing ring body is provided with a dustproof lip that protrudes downward and is located above the outer side of the non-contact lip. A fourth channel is formed between the lower surface of the dustproof lip and the outer sidewall end face of the inner sealing groove. The outer side of the connecting part, the lower surface of the inner edge of the sealing ring body, the inner side of the dustproof lip, and the sidewall of the inner sealing groove form a second space. Both the second channel and the fourth channel are connected to the second space, and the width of both the second channel and the fourth channel is smaller than the width of the second space. After the grease enters the larger second space through the narrow second channel, it forms a vortex to reduce the grease from flowing out of the fourth channel.
[0007] Preferably, the width of the first and third channels is 1 unit length, the width of the second channel is 2 units length, the width of the fourth channel is 1.5 units length, the width of the first space is 3-4 units length and the length is 5-6 units length, and the width of the second space is 4-6 units length and the length is 5-8 units length.
[0008] Preferably, the upper surface of the grease-blocking lip is higher than the inner sidewall end face of the inner sealing groove, and the upper surface of the grease-blocking lip is inclined.
[0009] Preferably, the distance between the grease-blocking lip and the retainer is 4-5 units in length.
[0010] Preferably, the outer sidewall end face of the inner sealing groove is lower than the inner sidewall end face of the inner sealing groove.
[0011] This utility model also provides a non-contact sealed bearing, including an inner bearing ring, an outer bearing ring, a cage, and rolling elements. Sealing rings are provided on both sides between the inner and outer bearing rings, and the sealing rings are the non-contact sealing rings described above.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model forms a large space between the two sides of the non-contact lip and the inner sealing groove to form a vortex, which slows down the airflow speed. It also forms a labyrinthine channel between the non-contact lip, the grease-blocking lip, and the dust-proof lip and the inner sealing groove to lengthen the sealing path, thereby slowing down the gas flow and greatly preventing grease leakage, thus achieving a good sealing effect and avoiding contamination inside the bearing. Attached Figure Description
[0013] Figure 1 This is a cross-sectional view of the present invention.
[0014] Figure 2 This is a partially enlarged sectional view of the present invention. Detailed Implementation
[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0016] like Figure 1 , Figure 2 As shown, this utility model provides a non-contact sealing ring, including a sealing ring body 1 and a skeleton 2 disposed within the sealing ring body 1. The outer edge of the sealing ring body 1 is installed at the outer sealing groove 4 of the outer ring 3 of the bearing, and the inner edge of the sealing ring body 1 is installed at the inner sealing groove 6 of the inner ring 5 of the bearing. A connecting part 7 extends downward from the middle of the inner edge of the sealing ring body 1. A non-contact lip 8 protrudes inward from the lower end of the connecting part 7. The non-contact lip 8 extends into the inner sealing groove 6, and a first channel D is formed between the inner side surface of the non-contact lip 8 and the side wall of the inner sealing groove 6. A second channel E, which communicates with the first channel D, is formed between the lower end surface of the non-contact lip 8 and the bottom wall of the inner sealing groove 6.
[0017] The inner side of the inner edge of the sealing ring body 1 is provided with a grease-blocking lip 9 protruding inward and located above the inner side of the non-contact lip 8. The lower surface of the grease-blocking lip 9 is lower than the inner side wall end face 10 of the inner sealing groove 6, and a third channel B is formed between the inner side surface of the grease-blocking lip 9 and the side wall of the inner sealing groove 6. The lower surface of the grease-blocking lip 9, the inner side surface of the connecting part 7, the upper surface of the non-contact lip 8, and the side wall of the inner sealing groove 6 form a first space C. The first channel D and the third channel B are both connected to the first space C, and the width of the first channel D and the third channel B are both smaller than the width of the first space C. After the grease enters the large first space C through the narrow third channel B, it forms a vortex to reduce the grease from flowing out of the first channel D.
[0018] The outer side of the inner edge of the sealing ring body 1 is provided with a dustproof lip 11 that protrudes downward and is located above the outer side of the non-contact lip 8. The lower surface of the dustproof lip 11 and the outer side wall end face 12 of the inner sealing groove 6 form a fourth channel G. The outer side of the connecting part 7, the lower surface of the inner edge of the sealing ring body 1, the inner side of the dustproof lip 11, and the side wall of the inner sealing groove 6 form a second space F. The second channel E and the fourth channel G are both connected to the second space F, and the width of the second channel E and the fourth channel G are both smaller than the width of the second space F. After the grease enters the large second space F through the narrow second channel E, it forms a vortex to reduce the grease from flowing out of the fourth channel G.
[0019] In use, the grease-blocking lip 9 guides most of the air and grease into the upper bearing and prevents it from flowing downwards. A small amount of air and grease can enter the first space C through the third channel B. As a small amount of air and grease moves from the smaller third channel B to the larger first space C, the flow rate of air and grease decreases. Due to the obstruction of the upper surface of the non-contact lip 8, the air pressure increases and eddies are generated to prevent the orderly flow of air, thereby slowing down the flow rate of grease and reducing the amount of grease flowing out of the first channel D. Even if a small amount of air and grease flows out of the first channel D and the second channel E into the second space F, the flow rate of air and grease decreases again due to the increased space. Due to the obstruction of the side wall of the inner sealing groove 6 and the inner side of the dustproof lip 11, the air pressure increases again and eddies are generated to prevent the orderly flow of air, thereby slowing down the flow rate of grease again and reducing the amount of grease flowing out of the fourth channel G. The inner edge of the sealing ring body 1 forms a labyrinthine channel and vortex space with the inner sealing groove 6 through the grease-blocking lip 9, the non-contact lip 8 and the dustproof lip 11, thereby slowing down the gas flow and preventing grease leakage, thus achieving a good sealing effect and preventing the bearing interior from being contaminated.
[0020] Preferably, the width of the first channel D is 1 unit length. When a small amount of gas and grease in the larger first space C encounters the smaller space of the first channel D, the air pressure flow velocity in the first channel D decreases, the air pressure increases, and the grease flow is obstructed, thus reducing the grease flow velocity. The width of the third channel B is 1 unit length. A large amount of air and grease is blocked outside the smaller space of the third channel B and cannot enter; only a small amount of air and grease can enter. The width of the second channel E is 2 unit lengths, and the length is 3-4 unit lengths. After a small amount of air and grease enters the second channel E, the air flow velocity in the second channel E decreases further, and the grease flow velocity decreases even further. The width of the fourth channel G is 1.5 unit lengths, and the length is 2 unit lengths. A very small amount of gas can pass through the fourth channel G and overflow the sealing ring. Grease, blocked by the previous multiple channels and spaces, almost never flows out through the fourth channel G. The width of the first space C is 3-4 units, and the length is 5-6 units. A small amount of air and grease will enter the large first space C through the third channel B. The airflow speed decreases, the air pressure increases, and vortices are generated, hindering the orderly flow of gas. The grease flow speed slows down within the first space C. The width of the second space F is 4-6 units, and the length is 5-8 units. After a small amount of air and grease enters the second space F, the sudden increase in space size causes the airflow speed to decrease again, the air pressure to increase again, and vortices to be generated, further hindering the orderly flow of gas. The grease flow speed slows down further within the second space F. The unit length here is not an actual unit of length measurement; its value can be set and adjusted according to the specifications of each bearing.
[0021] Preferably, the upper surface of the grease-blocking lip 9 is higher than the inner sidewall end face 10 of the inner sealing groove 6, and the upper surface of the grease-blocking lip 9 is inclined. The upper surface of the grease-blocking lip 9 can guide grease to flow towards the sealing ring body 1, thereby reducing the amount of grease entering the inner sealing groove 6. The distance between the grease-blocking lip 9 and the retainer 13 is 4-5 units, and its width is greater than the width of the third channel B. Most of the air and grease flow through the gap A between the grease-blocking lip 9 and the retainer 13, and only a small amount of air and grease enters the third channel B, reducing grease leakage.
[0022] Preferably, the outer sidewall end face 12 of the inner sealing groove 6 is lower than the inner sidewall end face 10 of the inner sealing groove 6, which has a better sealing and dustproof effect.
[0023] This utility model also provides a non-contact sealed bearing, including an inner bearing ring 5, an outer bearing ring 3, a cage 13, and rolling elements 14. Sealing rings are provided on both sides between the inner bearing ring 5 and the outer bearing ring 3. The sealing rings are the non-contact sealing rings described above. After applying the above sealing rings, the sealing effect is good, and the non-contact bearing greatly reduces the problem of grease leakage.
[0024] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A non-contact sealing ring, comprising a sealing ring body and a skeleton disposed within the sealing ring body, wherein the outer edge of the sealing ring body is installed at the outer sealing groove of the outer ring of a bearing, and the inner edge of the sealing ring body is installed at the inner sealing groove of the inner ring of a bearing, characterized in that: The inner edge of the sealing ring body extends downward to the middle of the connecting part, and the lower end of the connecting part is provided with a non-contact lip. The non-contact lip extends into the inner sealing groove, and a first channel is formed between the inner side surface of the non-contact lip and the side wall of the inner sealing groove. A second channel is formed between the lower end surface of the non-contact lip and the bottom wall of the inner sealing groove, which is connected to the first channel. The inner side of the inner edge of the sealing ring body is provided with a grease-blocking lip that protrudes inward and is located above the inner side of the non-contact lip. The lower surface of the grease-blocking lip is lower than the inner side wall end face of the inner sealing groove, and a third channel is formed between the inner side surface of the grease-blocking lip and the side wall of the inner sealing groove. The lower surface of the grease-blocking lip, the inner side surface of the connecting part, the upper surface of the non-contact lip, and the side wall of the inner sealing groove form a first space. The first channel and the third channel are both connected to the first space, and the width of the first channel and the third channel are both smaller than the width of the first space. After the grease enters the large first space through the narrow third channel, it forms a vortex to reduce the grease from flowing out of the first channel. The outer side of the inner edge of the sealing ring body is provided with a dustproof lip that protrudes downward and is located above the outer side of the non-contact lip. A fourth channel is formed between the lower surface of the dustproof lip and the outer sidewall end face of the inner sealing groove. The outer side of the connecting part, the lower surface of the inner edge of the sealing ring body, the inner side of the dustproof lip, and the sidewall of the inner sealing groove form a second space. Both the second channel and the fourth channel are connected to the second space, and the width of both the second channel and the fourth channel is smaller than the width of the second space. After the grease enters the larger second space through the narrow second channel, it forms a vortex to reduce the grease from flowing out of the fourth channel.
2. The non-contact sealing ring according to claim 1, characterized in that: The width of the first and third channels is 1 unit length, the width of the second channel is 2 units length, the width of the fourth channel is 1.5 units length, the width of the first space is 3-4 units length and the length is 5-6 units length, and the width of the second space is 4-6 units length and the length is 5-8 units length.
3. The non-contact sealing ring according to claim 1 or 2, characterized in that: The upper surface of the grease-blocking lip is higher than the inner sidewall end face of the inner sealing groove, and the upper surface of the grease-blocking lip is inclined.
4. The non-contact sealing ring according to claim 3, characterized in that: The distance between the grease-blocking lip and the retainer is 4-5 units in length.
5. The non-contact sealing ring according to claim 1 or 2, characterized in that: The outer sidewall end face of the inner sealing groove is lower than the inner sidewall end face of the inner sealing groove.
6. A non-contact sealed bearing, comprising an inner bearing ring, an outer bearing ring, a cage, and rolling elements, wherein sealing rings are provided on both sides between the inner bearing ring and the outer bearing ring, characterized in that: The sealing ring is the non-contact sealing ring as described in any one of claims 1-5.