Split type guide sealing element
By using a split-type guide seal design, and utilizing the continuous sealing surfaces of multiple sealing rings and the outer lip, as well as the clamping ridge and groove, the leakage and wear problems of traditional seals under high pressure, high temperature and high speed operating environments are solved, achieving higher sealing performance and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO RUICHEN NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-07-12
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional seals are prone to leakage, wear, and high frictional resistance under high pressure, high temperature, and high speed conditions, making it difficult to meet the requirements for sealing effect and stability.
The design employs a split-type guide seal, which includes a continuous sealing surface of multiple sealing rings, an extended lip, a clamping ridge and groove fit, a plug-in post and plug-in groove connection, and a sliding sleeve and bushing structure, to ensure a stable connection of the sealing rings and reduce friction.
It improves sealing performance, prevents media leakage, enhances the stability and service life of the seal, reduces frictional resistance, and simplifies the installation process.
Smart Images
Figure CN224260908U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mechanical seal technology, and in particular to a split-type guide seal. Background Technology
[0002] Guide seals are widely used in hydraulic systems, primarily for guiding and sealing the pistons of hydraulic cylinders. Guide seals are used for mid-section sealing, with U-shaped sealing rings installed before and after them in opposite directions. They primarily act as a barrier seal against hydraulic oil. The guide seal is installed before the two U-shaped sealing rings, providing a secondary sealing function and also guiding the U-shaped sealing rings at both ends, preventing uneven force distribution and ensuring the sealing effect is not affected by piston position changes. Traditional seal designs often struggle to meet the demands of these demanding conditions, especially in high-pressure, high-temperature, and high-speed environments. Because traditional seals are one-piece components, the contact surface with the sealing surface is a single, continuous area, making them prone to leakage and wear. The entire sliding seal also results in greater frictional resistance, impacting equipment reliability and service life. In existing technologies, several methods are commonly used to achieve good sealing performance: First, a single integral sealing ring is used. This type of sealing ring has a simple structure and is easy to manufacture, but it is prone to deformation and damage under complex operating conditions. Second, seals made of multi-layer composite materials are used. While these seals improve wear resistance and temperature resistance, they are more expensive and complex to assemble. Third, springs or rubber elastic elements are used to enhance the sealing effect. This method can compensate for unevenness of the sealing surface to some extent, but long-term use may lead to elastic fatigue, thereby reducing sealing performance. However, all of the above existing technologies have certain limitations. Especially under high-pressure environments, single integral sealing rings and multi-layer composite material seals are prone to local deformation due to uneven stress, leading to seal failure. The large contact area of the sealing surface also increases resistance and equipment wear. Seals with springs or rubber elastic elements may weaken their elasticity due to prolonged operation, failing to effectively maintain the sealing effect. Therefore, how to improve the stability of the seal, reduce operating friction, and improve reliability while ensuring sealing performance has become an urgent technical problem to be solved. Utility Model Content
[0003] The purpose of this application is to overcome the above-mentioned technical problems and provide a split-type guide seal.
[0004] A split-type guide seal includes: a sealing body with connecting portions symmetrically arranged on both sides; multiple sealing rings are provided on the connecting portions and slidably fitted onto the outer wall of the connecting portions; the outer circular surfaces of the multiple sealing rings are arranged side by side to form a continuous sealing surface, and the outer circular surfaces of the sealing rings are provided with extended lips. By adopting the above technical solution, the split-type guide seal can achieve effective sealing and guiding functions. Specifically, the parallel arrangement of the outer circular surfaces of the multiple sealing rings to form a continuous sealing surface ensures good sealing performance of the entire seal during operation. The extended lips on the outer circular surfaces of the sealing rings further enhance the sealing effect and prevent media leakage. Preferably, the sealing rings are provided with pressing protrusions, and adjacent sealing rings are provided with pressing grooves. The pressing grooves and pressing protrusions abut against each other, causing the extended lips to extend axially outward. By adopting the above technical solution, the pressing protrusions on the sealing rings and the pressing grooves of adjacent sealing rings cooperate with each other, allowing the extended lips to effectively extend axially outward, thereby improving sealing performance and reducing the risk of leakage. At the same time, this structural design also enhances the overall stability of the seal and extends its service life. Preferably, the sealing ring connected to the sealing body is provided with a plug-in post, and the sealing body is provided with a plug-in groove for accommodating the plug-in post. By adopting the above technical solution, the design of the plug-in post and the plug-in groove makes the connection between the sealing ring and the sealing body more stable and reliable, effectively preventing loosening due to vibration or impact during use, and improving the stability and service life of the overall structure. At the same time, this design also facilitates assembly and maintenance, simplifying the installation process. Preferably, the inner ring surface of the sealing ring is provided with a sliding sleeve. By adopting the above technical solution, the inner ring surface of the sealing ring is provided with a sliding sleeve, making the sliding of the sealing ring on the connection part smoother, reducing frictional resistance, and improving the service life and reliability of the device. At the same time, the sliding sleeve can effectively prevent wear on the surface of the connection part, further enhancing the overall performance of the seal. Preferably, a clearance groove is also provided in the pressing groove. By adopting the above technical solution, a relief groove is provided in the pressing groove, which provides additional space when the sealing ring is subjected to external pressure. This prevents excessive stress concentration at the contact surface between the pressing groove and the pressing ridge, thereby improving the overall stability and service life of the seal. Simultaneously, the relief groove design effectively reduces material deformation caused by internal air pressure changes, further enhancing sealing performance. Preferably, the sealing body is provided with a bushing. By adopting the above technical solution, the bushing improves the wear resistance and durability of the sealing body, reduces friction and wear, and extends its service life. At the same time, the bushing effectively prevents damage to the sealing body due to high temperature or corrosion during use, enhancing the stability and reliability of the overall structure. Preferably, the bushing is installed in the bushing groove of the sealing body. By adopting the above technical solution, the bushing installed in the bushing groove of the sealing body effectively improves the overall stability and reliability of the seal, preventing seal failure due to changes in the external environment.Meanwhile, the use of bushings can reduce friction and wear, extending the service life of the seals. Preferably, the outermost sealing ring of the plurality of sealing rings has a guide surface.
[0005] By designing guide surfaces to guide the sealing ring, the deformation of the seal due to stress concentration during sliding can be reduced.
[0006] In summary, this application includes at least one of the following beneficial technical effects: 1. The outer circular surfaces of multiple sealing rings are arranged side by side to form a continuous sealing surface, and each sealing ring has an extended lip on its outer circular surface, which can significantly improve the overall sealing performance of the seal, especially in high-pressure environments where leakage can be effectively prevented. 2. The clamping protrusions on the sealing rings cooperate with the clamping grooves on adjacent sealing rings to ensure tight contact between the sealing rings, enhancing the stability of the seal and avoiding local deformation caused by uneven stress. 3. The insertion post on the connecting part and the insertion hole on the sealing body ensure a firm connection between the sealing rings and the sealing body, further improving the reliability and durability of the seal.
[0007] Attached image description: Figure 1 This is a cross-sectional diagram showing the installation and use of a split-type guide seal.
[0008] Figure 2 This is a cross-sectional schematic diagram of a split-type guide seal;
[0009] Figure 3 This is an exploded view of a split-type guide seal;
[0010] Figure 4 yes Figure 2 Enlarged view of section A.
[0011] Reference numerals: 1. Sealing body; 11. Connecting part; 12. Bushing groove; 13. Insertion groove; 14. Bushing; 2. Sealing ring; 21. First sealing ring; 211. Insertion post; 22. Second sealing ring; 23. Third sealing ring; 24. Fourth sealing ring; 241. Guide surface; 25. Sliding sleeve; 26. Outer lip; 27. Pressing protrusion; 28. Pressing groove; 29. Relief groove. Detailed Implementation
[0012] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model, and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of this utility model without creative effort, and these embodiments are also within the protection scope of this utility model. The inventors of this application have found that traditional seals are prone to sealing failure and material aging under high pressure, high temperature and high speed environments. Therefore, this application mainly adopts the following design of a split-type guide seal, which achieves the effect of improving the reliability and stability of the seal. The following is a further detailed description of this application. Embodiment This application provides a split-type guide seal. Figure 2 As shown, the device includes a sealing body 1 with symmetrically arranged connecting portions 11 on both sides. Sealing rings 2 are provided on the connecting portions, with the sealing rings 2 on both sides of the connecting portions 11 arranged in opposite directions and slidably fitted onto the outer wall of the connecting portions 11. A first sealing ring 21 is sequentially arranged along the connecting portions 11 near the sealing body 1, one side connecting to the sealing body 1 and the other side abutting against a second sealing ring 22. A third sealing ring 23 is provided on the other side of the second sealing ring 22, and a fourth sealing ring 24 is provided on the other side of the third sealing ring 23. The fourth sealing ring 24 is used to guide the overall sealing element. Sliding sleeves 25 are provided on the inner ring walls of the second sealing ring 22 and the third sealing ring 23, allowing them to slide axially along the outer wall of the connecting portions 11. The outer surfaces of multiple sealing rings 2 are arranged side-by-side to form a continuous sealing surface. The outer edges of the first sealing ring 21, the second sealing ring 22, and the third sealing ring 23 are provided with extended lips 26. This design significantly improves the reliability and stability of the sealing element through the design of multiple sealing rings. A bushing groove 12 is provided on the outer edge of the sealing body 1 for installing a bushing 14. The bushing 14 is part of the sealing body and is installed within the bushing groove 12 of the sealing body 1. The function of the bushing 14 is to provide a buffer between the seal and the sealed component, reducing friction and wear. The bushing 14 can be made of polytetrafluoroethylene (PTFE) or other materials with a low coefficient of friction to ensure smooth sliding. The first sealing ring 21, the second sealing ring 22, and the third sealing ring 23 are circular ring structures made of elastic materials, such as polyurethane or hard rubber. The extended lip 26 increases the contact area and improves the sealing effect. The thickness of each sealing ring can be adjusted according to actual application requirements. The extended lip 26 is the portion extending outward from the outer circumference of the sealing ring and inclined towards the side to be sealed, adding an outwardly protruding sealing ring surface at the outer edge of the seal, thus improving sealing performance. Figure 3 , Figure 4As shown, the first sealing ring 21 has a plug-in post 211 at one end near the sealing body 1 and a pressing protrusion 27 at the other end away from the sealing body 1. The adjacent second sealing ring 22 has a pressing groove 28 on one side and a pressing protrusion 27 on the other side. The adjacent third sealing ring 23 has a corresponding pressing groove 28 on one side and a pressing protrusion 27 on the other side. The adjacent fourth sealing ring 24 has a corresponding pressing groove 28 on one side. Through the contact and pressing of the adjacent pressing grooves 28 and pressing protrusions 27, the outer lip 26 extends radially outward from the outer side of the main sealing ring. This design effectively prevents deformation of the sealing ring under high pressure, maintaining a stable sealing effect. The height and width of the pressing protrusion 27 can be adjusted according to actual conditions to adapt to different pressure levels. The plug-in post 211 is located at the contact surface adjacent to the sealing body 1. The sealing body 1 has a plug-in groove 13 for accommodating the plug-in post 211. This design helps to fix the position of the sealing ring and prevent it from shifting during movement. The diameter of the insertion post 211 is slightly larger than that of the insertion groove 13, and after insertion, it is interference-fitted to facilitate the fixation of the first sealing ring 21 to the sealing body 1. Figure 4As shown, the sliding sleeve 25 is a thin-walled tubular structure that is fitted onto the inner ring surfaces of the second sealing ring 22 and the third sealing ring 23, reducing the frictional force during relative sliding between the second and third sealing rings and the connecting part 11. The sliding sleeve 25 can be made of a self-lubricating material, such as polyoxymethylene (POM), to extend the service life of the seal. A relief groove 29 is also provided at the joint of the contact surfaces of the adjacent mating first sealing ring 21 and the second sealing ring 22, and similarly at the joint of the contact surfaces of the second sealing ring 22 and the third sealing ring 23. The relief groove 29 is to avoid stress concentration caused by the complete fit between the pressing protrusion 27 and the pressing groove 28. The presence of the relief groove 29 ensures that a certain gap exists between the contact surfaces of the two sealing rings after the pressing protrusion 27 and the pressing groove 28 are fitted, thereby reducing the pressure and uneven air pressure distribution of the sealing rings and improving the durability of the seal. A guide surface 241 is provided on the outermost fourth sealing ring 24. The guide surface 241 is a plane that gradually slopes outward from the outer circle of the sealing ring, serving as a guide to help the seal slide better within the sealing cavity. The angle of the guide surface 24 is typically between 15° and 30°, with the appropriate angle selected based on specific circumstances. The implementation principle of this embodiment is as follows: through the design of the multi-layer sealing rings 2, each layer of sealing ring undertakes a portion of the sealing task. Even if one layer of sealing ring is damaged, the other layers can still continue to function, greatly improving the overall reliability of the seal. In actual use, since the first sealing ring 21, the second sealing ring 22, and the third sealing ring 23 are all provided with extended lips 26, when the piston moves in the direction requiring sealing, the resistance at the tip of the extended lip increases when subjected to vibration or increased pressure. The pressure is transmitted and pressed sequentially from the outermost third sealing ring 23 towards the second sealing ring 22. After being squeezed by the pressing protrusion 27 against the pressing groove 28, the extended lip 26, squeezed by pressure, continues to expand radially and fits tightly against the surface to be sealed. The combined action of multiple sealing rings achieves the sealing effect by sequentially pressing the extended lips. On the other side of the sealing body, the sealing ring is installed in the opposite direction and does not provide a sealing effect. The tip of the extended lip is opposite to the direction of resistance, and this surface has a smooth transition, resulting in less resistance than during phase movement. During sliding, the first sealing ring 21, the second sealing ring 22, and the third sealing ring 23 are pulled apart sequentially from the direction closest to the sealing body 1. Since the pressing ridge is not under force, the extended lip does not extend outward to press tightly, thereby reducing frictional resistance. When the piston moves in the opposite direction, the sealing rings on both sides of the sealing body act in opposite directions, achieving bidirectional sealing and resistance reduction. In addition, the design of the pressing ridge and pressing groove ensures that each layer of sealing rings fits tightly, enhancing the sealing effect. The application of the sliding sleeve 25 and the bushing 14 reduces friction and extends the service life of the seal. In summary, this design not only solves the common problems of traditional seals in high-pressure and vibrating operating environments but also improves the operational stability and safety of the equipment.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 split-type guide seal, characterized in that, include: The sealing body (1) has connecting parts (11) symmetrically opened on both sides; multiple sealing rings (2) are provided on the connecting parts and are slidably sleeved on the outer wall of the connecting parts; the outer circular surfaces of the multiple sealing rings (2) are arranged side by side to form a continuous sealing surface, and the outer circular surface of the sealing ring is provided with an extended lip (26).
2. A split-type guide seal according to claim 1, characterized in that, The sealing ring (2) is provided with a pressing protrusion (27), and the adjacent sealing ring is provided with a pressing groove (28). The outer lip (26) extends radially outward by pressing the pressing groove (28) against the pressing protrusion (27).
3. A split-type guide seal according to claim 2, characterized in that, The sealing ring connected to the sealing body is provided with a plug post (211), and the sealing body (1) is provided with a plug groove (13) for accommodating the plug post (211).
4. A split-type guide seal according to claim 3, characterized in that, The inner ring surface of the sealing ring is provided with a sliding sleeve (25).
5. A split-type guide seal according to claim 2, characterized in that, The pressing groove is also provided with a relief groove (29).
6. A split-type guide seal according to claim 1, characterized in that, The sealing body is provided with a bushing (14).
7. A split-type guide seal according to claim 6, characterized in that, The bushing (14) is installed in the bushing groove (12) of the sealing body.
8. A split-type guide seal according to claim 1, characterized in that, The outermost sealing ring of the plurality of sealing rings has a guide surface (241).