High-speed oil seal for positive and negative rotation of shaft body
By designing an oil seal structure that includes an elastic sealing body and a spiral groove, the problem of oil leakage during the reverse rotation of the shaft in traditional oil seals has been solved, achieving a sealing effect under high-speed rotation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 常州绍鼎密封科技有限公司
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional oil seals are prone to oil leakage during shaft reversal, and cannot effectively maintain a seal, especially in high-speed rotation scenarios such as new energy electric drives.
The structure includes an elastic sealing body, an inner ring plate, a reverse elastic ring plate, and a forward elastic ring plate. The design of the reverse and forward spiral grooves blocks and stores oil during the forward and reverse rotation of the shaft, and the seal is achieved through the deformation and restoring deformation force of the spiral grooves.
During the high-speed forward and reverse rotation of the shaft, oil leakage is effectively reduced, sealing performance is improved, and the sealing effect between the shaft housing and the shaft is ensured.
Smart Images
Figure CN224214697U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of structural sealing technology, and in particular to a high-speed oil seal for forward and reverse rotation of a shaft. Background Technology
[0002] Oil seals are widely used in mechanical equipment, engines, hydraulic systems, petroleum, chemical industries, and new energy fields. Oil seals form a seal between rotating shafts and stationary components (such as shaft housings), isolating and sealing lubricating oil within a predetermined space to prevent oil leakage and ensure the safe and stable operation of equipment.
[0003] Traditional oil seal structures can typically only ensure a seal when the shaft is rotating at low speeds and in the forward direction. However, in actual production operations, such as the rotation speed of the shaft in new energy electric drives, which is much higher than that of ordinary shafts, ordinary oil seals will still leak oil even when the shaft is rotating in the forward direction. Moreover, the shaft will also have a short period of reverse rotation, such as during the reversing process. At this time, lubricating oil is prone to leakage, which is a significant shortcoming. Utility Model Content
[0004] To address the issue of oil leakage during shaft reversal, this application provides a high-speed oil seal for shaft reversal.
[0005] The high-speed oil seal for forward and reverse rotation of the shaft provided in this application adopts the following technical solution:
[0006] A high-speed oil seal for rotating a shaft includes an elastic sealing body, an inner core ring plate, a reverse elastic ring plate, and a forward elastic ring plate. The elastic sealing body forms a seal with the shaft housing and is disposed on the outer side of the inner core ring plate. The reverse and forward elastic ring plates are both disposed on the inner side of the inner core ring plate and are fitted onto the shaft. An oil storage cavity is formed between the reverse and forward elastic ring plates and the shaft. When the shaft rotates clockwise around its axis, the reverse elastic ring plate has a reverse spiral groove that rotates clockwise around the axis of the shaft, and the forward elastic ring plate has a forward spiral groove that rotates counterclockwise around the axis of the shaft. Both the reverse and forward spiral grooves are fitted against the outer wall of the shaft.
[0007] By adopting the above technical solution, during the process of the oil seal sleeve on the shaft, both the reverse elastic ring plate and the forward elastic ring plate deform. At the same time, the forward spiral groove of the forward elastic ring plate and the reverse spiral groove of the reverse elastic ring plate wrap around and abut against the outer wall of the shaft. When the shaft rotates clockwise at high speed around its axis, most of the oil in the shaft housing is blocked by the reverse elastic ring plate. A small portion of the oil diffuses to the oil storage cavity through the contact point between the reverse elastic ring plate and the shaft. Since the shaft is usually placed horizontally, the diffused oil will first be stored in the oil storage cavity. As the shaft is used for a longer period of time, some oil will diffuse to the contact surface between the forward elastic ring plate and the shaft. At this time, the forward spiral groove on the forward elastic ring plate will prevent the oil from continuing to diffuse. When the shaft rotates counterclockwise around its axis, the reverse spiral groove on the reverse elastic ring plate will prevent the oil in the shaft housing from diffusing into the oil storage cavity. This allows the shaft to maintain a sealing effect during high-speed rotation, reducing the possibility of oil leakage between the shaft housing and the shaft.
[0008] Optionally, the positive elastic ring plate is provided with a bending ring groove.
[0009] By adopting the above technical solution, when the shaft is inserted into the positive elastic ring plate, the positive elastic ring plate at the bending groove is thin, so the positive elastic ring plate can bend and deform smoothly. At the same time, the bent and deformed positive elastic ring plate can be tightly fitted onto the outer wall of the shaft. Through the restoring deformation force of the positive elastic ring plate, the contact position between the shaft and the positive elastic ring plate can be completely sealed.
[0010] Optionally, the positive spiral groove is not connected to the inner diameter sidewall of the positive elastic ring plate, nor is it connected to the outer diameter sidewall of the positive elastic ring plate; similarly, the reverse spiral groove is not connected to the inner diameter sidewall of the reverse elastic ring plate, nor is it connected to the outer diameter sidewall of the reverse elastic ring plate.
[0011] By adopting the above technical solution, when the shaft rotates counterclockwise around its axis, the part of the inner diameter of the positive elastic ring plate without the positive spiral groove will prevent the oil from diffusing to the outside of the shaft housing, and the part of the inner diameter of the negative elastic ring plate without the negative spiral groove will prevent the oil from diffusing to the oil storage cavity, thereby improving the sealing performance of the oil seal during the high-speed rotation of the shaft.
[0012] Optionally, the reverse elastic ring plate is provided with a limiting protrusion, which is located between the reverse spiral groove and the inner diameter sidewall of the reverse elastic ring plate.
[0013] By adopting the above technical solution, the reverse elastic ring plate will be adjusted during the processing, and the worker can observe the position of the limiting convex ring to determine whether the processing of the reverse elastic ring plate is qualified.
[0014] Optionally, the circumferential outer wall of the elastic seal body is provided with a plurality of sealing protrusions, which are evenly arranged along the axial direction of the inner bone ring plate.
[0015] By adopting the above technical solution, it is beneficial to improve the sealing performance between the elastic seal and the shaft housing.
[0016] Optionally, the elastic sealing body is provided with an outer bone ring plate, and an elastic dustproof lip ring is coaxially provided on the inner side of the outer bone ring plate, the elastic dustproof lip ring abutting against the outer side wall of the shaft.
[0017] By adopting the above technical solution, the possibility of external dust entering the oil storage chamber is reduced.
[0018] Optionally, the elastic dustproof lip ring has multiple oil return lines on the side that contacts the shaft. The multiple oil return lines are evenly and obliquely distributed along the circumferential axis of the outer bone ring plate. When the shaft rotates clockwise around its axis, the oil return lines are obliquely inclined counterclockwise around the axis of the shaft. The end of the oil return line near the inner diameter sidewall of the elastic dustproof lip ring is not connected.
[0019] By adopting the above technical solution, when oil accidentally enters between the elastic dustproof lip ring and the positive elastic ring plate, the clockwise rotating shaft will prevent the oil from spreading to the outside of the shaft housing through the oil return line.
[0020] Optionally, an elastic connecting ring plate is coaxially provided on the outer bone ring plate, and the elastic connecting ring plate presses the positive elastic ring plate against the elastic dustproof lip ring.
[0021] By adopting the above technical solution, it is beneficial to improve the sealing performance between the positive elastic ring plate and the elastic dustproof lip ring.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. During the process of the oil seal sleeve being fitted onto the shaft, both the reverse elastic ring plate and the forward elastic ring plate deform. Simultaneously, the forward spiral groove of the forward elastic ring plate and the reverse spiral groove of the reverse elastic ring plate wrap around and abut against the outer wall of the shaft. When the shaft rotates clockwise at high speed around its axis, most of the oil in the shaft housing is blocked by the reverse elastic ring plate. A small portion of the oil diffuses into the oil storage cavity through the contact point between the reverse elastic ring plate and the shaft. Since the shaft is usually placed horizontally, the diffused oil is first stored in the oil storage cavity. As the shaft is used for a longer period of time, some oil diffuses to the contact surface between the forward elastic ring plate and the shaft. At this time, the forward spiral groove on the forward elastic ring plate will prevent the oil from continuing to diffuse. When the shaft rotates counterclockwise around its axis, the reverse spiral groove on the reverse elastic ring plate will prevent the oil in the shaft housing from diffusing into the oil storage cavity. This allows the shaft to maintain a sealing effect during high-speed rotation, reducing the possibility of oil leakage between the shaft housing and the shaft.
[0024] 2. During the process of inserting the shaft into the positive elastic ring plate, due to the thinness of the positive elastic ring plate at the bending groove, the positive elastic ring plate can bend and deform smoothly. At the same time, the bent and deformed positive elastic ring plate can be tightly fitted onto the outer wall of the shaft. Through the restoring deformation force of the positive elastic ring plate, the contact position between the shaft and the positive elastic ring plate can be completely sealed.
[0025] 3. When oil accidentally enters between the elastic dustproof lip ring and the positive elastic ring plate, the clockwise rotating shaft will prevent the oil from spreading out of the shaft housing through the oil return line. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.
[0027] Figure 2 This is a cross-sectional view in Embodiment 1 of this application used to illustrate the positional relationship between the reverse elastic ring plate, the forward elastic ring plate, and the elastic seal.
[0028] Figure 3 This is a cross-sectional view in Embodiment 2 of this application used to illustrate the positional relationship between the outer bone ring plate, the inner bone ring plate, and the elastic dustproof lip ring.
[0029] Explanation of reference numerals in the attached drawings: 1. Shaft body; 2. Elastic sealing body; 3. Inner bone ring plate; 4. Reverse elastic ring plate; 5. Forward elastic ring plate; 6. Oil storage cavity; 7. Reverse spiral groove; 8. Forward spiral groove; 9. Bending ring groove; 10. Limiting convex ring; 11. Sealing protrusion; 12. Outer bone ring plate; 13. Elastic dustproof lip ring; 14. Oil return line; 15. Elastic connecting ring plate; 16. Oil return cavity. Detailed Implementation
[0030] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.
[0031] This application discloses a high-speed oil seal for forward and reverse rotation of a shaft.
[0032] Example 1
[0033] Reference Figure 1 A high-speed oil seal for rotating shafts includes an elastic sealing body 2, an inner core ring plate 3, a reverse elastic ring plate 4, and a forward elastic ring plate 5. The elastic sealing body 2 and the reverse elastic ring plate 4 can both be made of rubber material, the inner core ring plate 3 can be made of metal material, and the forward elastic ring plate 5 can be made of PTFE material in the prior art.
[0034] Reference Figure 1 The elastic seal 2 is used to form a seal with the shaft housing. Multiple sealing protrusions 11 are integrally formed on the circumferential outer wall of the elastic seal 2. The multiple sealing protrusions 11 are evenly arranged along the axial direction of the inner bone ring plate 3. The sealing protrusions 11 are used to abut against the shaft housing.
[0035] Reference Figure 1 The elastic sealing body 2 is bonded to the circumferential outer wall of the inner bone ring plate 3 by vulcanization. The reverse elastic ring plate 4 and the forward elastic ring plate 5 are both arranged on the inner side of the inner bone ring plate 3. The forward elastic ring plate 5 is bonded to the reverse elastic ring plate 4 by vulcanization. The reverse elastic ring plate 4 and the forward elastic ring plate 5 are both used to be sleeved on the shaft 1. The forward elastic ring plate 5 has a bending ring groove 9. An oil storage cavity 6 is formed between the reverse elastic ring plate 4, the forward elastic ring plate 5 and the shaft 1.
[0036] During the process of the worker putting the oil seal on the shaft 1, both the reverse elastic ring plate 4 and the forward elastic ring plate 5 deform. At the same time, the forward elastic ring plate 5 bends and deforms at the bending ring groove 9. The forward spiral groove 8 of the forward elastic ring plate 5 and the reverse spiral groove 7 of the reverse elastic ring plate 4 wrap around and press against the outer wall of the shaft.
[0037] Reference Figure 2 When the shaft 1 rotates clockwise around its axis, the reverse elastic ring plate 4 has a reverse spiral groove 7 that is clockwise and spiral-shaped around the axis of the shaft 1, and the forward elastic ring plate 5 has a forward spiral groove 8 that is counterclockwise and spiral-shaped around the axis of the shaft 1.
[0038] Reference Figure 2 The positive spiral groove 8 is not connected to the inner diameter sidewall of the positive elastic ring plate 5, nor is it connected to the outer diameter sidewall of the positive elastic ring plate 5. Similarly, the negative spiral groove 7 is not connected to the inner diameter sidewall of the negative elastic ring plate 4, nor is it connected to the outer diameter sidewall of the negative elastic ring plate 4.
[0039] Reference Figure 2 Both the reverse spiral groove 7 and the forward spiral groove 8 are attached to the outer side wall of the shaft 1. A limiting protrusion 10 is integrally formed on the reverse elastic ring plate 4. The limiting protrusion 10 is located between the reverse spiral groove 7 and the inner diameter side wall of the reverse elastic ring plate 4.
[0040] When the shaft 1 rotates clockwise around its axis, the oil in the shaft housing will be blocked by the non-threaded section of the reverse elastic ring plate 4. When the rotation speed of the shaft 1 is too high, a small part of the oil in the shaft housing will diffuse to the oil storage chamber 6 through the contact position between the reverse elastic ring plate 4 and the shaft 1. Since the shaft 1 is usually placed horizontally, the diffused oil will be stored in the oil storage chamber 6 first.
[0041] As the service time of shaft 1 increases, some oil will diffuse to the contact surface between the positive elastic ring plate 5 and shaft 1. At this time, the non-threaded section on the positive elastic ring plate 5 will also hinder the diffusion of oil. Meanwhile, the positive spiral groove 8, which is in the shape of a counterclockwise spiral, will prevent the oil from continuing to diffuse, and the oil cannot diffuse to the outside of the shaft housing.
[0042] When the shaft 1 rotates counterclockwise around its axis, the clockwise spiral groove 7 will prevent the oil in the shaft housing from diffusing into the oil storage chamber 6. At the same time, the non-threaded section on the positive elastic ring plate 5 will also prevent the oil in the oil storage chamber 6 from diffusing out of the shaft housing. This ensures that the shaft 1 can maintain a sealing effect during high-speed forward and reverse rotation, thereby achieving a sealing effect between the shaft housing and the shaft 1.
[0043] The implementation principle of Example 1 is as follows: During the process of the worker putting the oil seal on the shaft 1, both the reverse elastic ring plate 4 and the forward elastic ring plate 5 are deformed. At the same time, the forward elastic ring plate 5 is bent and deformed at the bending ring groove 9. The forward spiral groove 8 part of the forward elastic ring plate 5 and the reverse spiral groove 7 part of the reverse elastic ring plate 4 are wrapped and pressed against the outer wall of the shaft.
[0044] When the shaft 1 rotates clockwise around its axis, the oil in the shaft housing will be blocked by the non-threaded section of the reverse elastic ring plate 4. When the rotation speed of the shaft 1 is too high, a small part of the oil in the shaft housing will diffuse to the oil storage chamber 6 through the contact position between the reverse elastic ring plate 4 and the shaft 1. Since the shaft 1 is usually placed horizontally, the diffused oil will be stored in the oil storage chamber 6 first.
[0045] As the service time of shaft 1 increases, some oil will diffuse to the contact surface between the positive elastic ring plate 5 and shaft 1. At this time, the non-threaded section on the positive elastic ring plate 5 will also hinder the diffusion of oil. Meanwhile, the positive spiral groove 8, which is in the shape of a counterclockwise spiral, will prevent the oil from continuing to diffuse, and the oil cannot diffuse to the outside of the shaft housing.
[0046] When the shaft 1 rotates counterclockwise around its axis, the clockwise spiral groove 7 will prevent the oil in the shaft housing from diffusing into the oil storage chamber 6. At the same time, the non-threaded section on the positive elastic ring plate 5 will also prevent the oil in the oil storage chamber 6 from diffusing out of the shaft housing. This ensures that the shaft 1 can maintain a sealing effect during high-speed forward and reverse rotation, thereby achieving a sealing effect between the shaft housing and the shaft 1.
[0047] Example 2
[0048] refer to Figure 3 The difference between this embodiment and embodiment 1 is that: an outer bone ring plate 12 is vulcanized and bonded to the elastic sealing body 2, the inner side of the outer bone ring plate 12 is coaxial and an elastic dustproof lip ring 13 is vulcanized and bonded to it, and the elastic dustproof lip ring 13 can be formed of rubber material.
[0049] Reference Figure 3 The elastic dustproof lip ring 13 abuts against the outer wall of the shaft body 1. The outer bone ring plate 12 is coaxial with and vulcanized and bonded to an elastic connecting ring plate 15. The elastic connecting ring plate 15 presses the positive elastic ring plate 5 onto the elastic dustproof lip ring 13. The elastic dustproof lip ring 13 is vulcanized and bonded to the positive elastic ring plate 5. The elastic dustproof lip ring 13, the positive elastic ring plate 5 and the shaft body 1 together form an oil return cavity 16.
[0050] Reference Figure 3 Multiple oil return lines 14 are provided on the side of the elastic dustproof lip ring 13 that contacts the shaft body 1. The multiple oil return lines 14 are evenly distributed circumferentially along the axis of the outer bone ring plate 12. When the shaft body 1 rotates clockwise around its axis, the oil return lines 14 tilt counterclockwise around the axis of the shaft body 1. The end of the oil return line 14 near the inner diameter sidewall of the elastic dustproof lip ring 13 is not connected.
[0051] The implementation principle of Example 2 is as follows: When the shaft 1 rotates clockwise around its axis, the oil in the oil return chamber 16 moves closer to the positive elastic ring plate 5 under the action of the oil return line 14, thereby reducing the possibility of the oil spreading to the outside of the shaft housing. At the same time, the elastic dustproof lip ring 13 blocks the way for external dust to enter the oil storage chamber 6 through the positive elastic ring plate 5.
[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-speed oil seal for forward and reverse rotation of a shaft, characterized in that: The assembly includes an elastic seal (2), an inner ring plate (3), a reverse elastic ring plate (4), and a forward elastic ring plate (5). The elastic seal (2) forms a seal with the shaft housing. The elastic seal (2) is located on the outside of the inner ring plate (3). The reverse elastic ring plate (4) and the forward elastic ring plate (5) are both located on the inside of the inner ring plate (3). The reverse elastic ring plate (4) and the forward elastic ring plate (5) are both fitted onto the shaft body (1). An oil storage cavity (6) is formed between the plate (4), the positive elastic ring plate (5), and the shaft (1). When the shaft (1) rotates clockwise around its axis, the reverse elastic ring plate (4) has a reverse spiral groove (7) that rotates clockwise around the axis of the shaft (1), and the positive elastic ring plate (5) has a positive spiral groove (8) that rotates counterclockwise around the axis of the shaft (1). The reverse spiral groove (7) and the positive spiral groove (8) are both attached to the outer wall of the shaft (1).
2. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 1, characterized in that: The positive elastic ring plate (5) is provided with a bending ring groove (9).
3. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 2, characterized in that: The positive spiral groove (8) is not connected to the inner diameter sidewall of the positive elastic ring plate (5), nor is it connected to the outer diameter sidewall of the positive spiral groove (8). Similarly, the negative spiral groove (7) is not connected to the inner diameter sidewall of the negative elastic ring plate (4), nor is it connected to the outer diameter sidewall of the negative elastic ring plate (4).
4. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 1, characterized in that: A limiting protrusion (10) is provided on the reverse elastic ring plate (4), and the limiting protrusion (10) is located between the reverse spiral groove (7) and the inner diameter sidewall of the reverse elastic ring plate (4).
5. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 1, characterized in that: The elastic sealing body (2) has a plurality of sealing protrusions (11) on its circumferential outer wall, and the plurality of sealing protrusions (11) are evenly arranged along the axial direction of the inner bone ring plate (3).
6. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 1, characterized in that: An outer bone ring plate (12) is provided on the elastic sealing body (2), and an elastic dustproof lip ring (13) is coaxially provided on the inner side of the outer bone ring plate (12), and the elastic dustproof lip ring (13) abuts against the outer side wall of the shaft body (1).
7. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 6, characterized in that: The elastic dustproof lip ring (13) has multiple oil return lines (14) on the side that contacts the shaft (1). The multiple oil return lines (14) are evenly distributed circumferentially along the axis of the outer bone ring plate (12). When the shaft (1) rotates clockwise around its axis, the oil return lines (14) tilt counterclockwise around the axis of the shaft (1). The end of the oil return line (14) near the inner diameter sidewall of the elastic dustproof lip ring (13) is not connected.
8. A high-speed oil seal for forward and reverse rotation of a shaft according to claim 7, characterized in that: An elastic connecting ring plate (15) is coaxially arranged on the outer bone ring plate (12), and the elastic connecting ring plate (15) presses the positive elastic ring plate (5) onto the elastic dustproof lip ring (13).