A cage-shaped biomimetic bristle-supported floating ring sealing structure
By setting a buffer cage made of biomimetic bristles between the floating ring and the fixed part, the problem of the floating ring being prone to impact is solved, and sealing stability is achieved when the rotating shaft vibrates or jumps, preventing deformation and leakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LANZHOU UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2025-07-07
- Publication Date
- 2026-05-26
AI Technical Summary
Floating rings are prone to impact with fixed structures, which can lead to a decrease in sealing performance. In particular, when there is radial vibration or instantaneous impact load on the rotating shaft, the fluid film is damaged, resulting in increased leakage or seal failure.
A buffer component is set between the floating ring and the fixed component. The buffer component is a cage-like structure composed of multiple biomimetic bristles. When the rotating shaft vibrates or jumps, the biomimetic bristles undergo elastic deformation, absorb the kinetic energy of the floating ring, and prevent it from impacting and deforming the inner wall of the fixed component.
It effectively prevents the floating ring from impacting the inner wall of the fixed component when the rotating shaft vibrates or jumps, maintains sealing performance, ensures the stability of the fluid film, and avoids seal failure.
Smart Images
Figure CN224283469U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical seals, specifically to a cage-shaped biomimetic bristle-supported floating ring sealing structure. Background Technology
[0002] Floating ring seals are a common method for sealing rotating shafts. In a floating ring seal, the rotating shaft is eccentrically mounted inside a floating ring. A sealing medium exists in the gap between the floating ring and the rotating shaft. When the rotating shaft begins to rotate, the hydrodynamic effect generates and maintains the sealing pressure, creating a fluid film between the rotating shaft and the floating ring, thus resisting leakage. However, when there is radial vibration or instantaneous impact load on the rotating shaft, or when there is radial runout, the floating ring may collide with its surrounding fixed structure, deforming or even breaking. This will have a destructive effect on the fluid film, leading to increased leakage or even seal failure. Utility Model Content
[0003] This invention provides a cage-shaped biomimetic rigid hair support floating ring sealing structure, which improves upon the problem in the prior art where floating rings are easily impacted by fixed structures, leading to a decrease in sealing performance, and can apply buffering to the floating ring.
[0004] To achieve the above objectives, this utility model provides a cage-type biomimetic bristle-supported floating ring sealing structure, including a floating ring assembly. The floating ring assembly includes a floating ring and a fixing member, wherein the fixing member is sleeved on the outer periphery of the floating ring, and the inner wall of the fixing member has a gap with the outer side of the floating ring; and
[0005] A buffer component includes a first buffer cage disposed in the gap between the floating ring and the fixing member; the number of first buffer cages is multiple, and the multiple first buffer cages are arranged in a ring shape at intervals along the circumference of the floating ring, and the buffer component includes at least one ring of first buffer cages; the first buffer cage includes biomimetic bristles, the biomimetic bristles extend along the direction from the floating ring to the fixing member, each first buffer cage includes multiple biomimetic bristles, the multiple biomimetic bristles form the cage wall of the first buffer cage, and the biomimetic bristles are used to undergo elastic deformation. In use, the rotating shaft forms a clearance fit with the inner wall of the floating ring, and a sealing medium is filled between the rotating shaft and the floating ring. The buffer component can support and fix the floating ring, thereby keeping the floating ring in an appropriate position. This allows the floating ring to be distributed according to the set layers and gaps, providing a stable spatial environment for the flow of the sealing medium and the formation of the fluid film. When the rotating bearing is subjected to radial vibration load, instantaneous impact load, or radial runout, the vibration is transmitted to the floating ring through the fluid film. The biomimetic bristles undergo elastic deformation to absorb the kinetic energy of the floating ring, thereby preventing the floating ring from impacting the inner wall of the fixing component and being damaged or deformed during this process.
[0006] As an optional technical solution, the buffer component further includes a second buffer cage, which is arranged along the direction from the floating ring to the fixing member, and its height along this direction is less than that of the first buffer cage. Multiple second buffer cages are arranged inside the first buffer cage. When the rotating bearing is subjected to a large radial vibration load, instantaneous impact load, or a large radial runout, the kinetic energy of the floating ring running within the fixing member is large. In this situation, when the first buffer cage buffers the floating ring, it may reach or exceed its yield limit, resulting in permanent deformation and causing the floating ring to deviate from its set position, affecting the sealing effect. The second buffer cage can supplement the buffering effect of the first buffer cage before it reaches its yield limit, preventing excessive deformation of the first buffer cage and thus protecting the floating ring.
[0007] As an optional technical solution, the height ratio of the first buffer cage to the second buffer cage along the floating ring to the fixing member is 1:0.35.
[0008] As an optional technical solution, the first buffer cage further includes a connecting piece disposed in the gap between the floating ring and the fixing member. The ends of the bionic bristles near the floating ring and / or near the fixing member are connected to the edge of the connecting piece. The connecting piece connects multiple bionic bristles, which helps to evenly distribute the load on the connected bionic bristles and prevents some of the bionic bristles from undergoing plastic deformation due to uneven load distribution.
[0009] As an optional technical solution, the biomimetic bristles are inclined circumferentially along the connecting piece from one end near the floating ring to the other end near the fixing member. When the first buffer cage absorbs the kinetic energy of the floating ring, it is compressed radially along the floating ring as a whole. During this process, the inclination angle of the biomimetic bristles can play a guiding role, causing the biomimetic bristles to undergo elastic deformation in the inclined direction, thus preventing the biomimetic bristles from being permanently deformed or broken due to random deformation.
[0010] As an optional technical solution, the buffer component further includes a base plate, which is sleeved on the outer periphery of the floating ring and located within the gap between the floating ring and the fixing member. The first buffer cage is disposed on the base plate. The first buffer cage can be formed on or mounted on the base plate. Mounting the base plate on the outer periphery of the floating ring helps to reduce manufacturing costs and manufacturing difficulty.
[0011] As an optional technical solution, the floating ring includes a ring body and a retaining edge. The ring body passes through the fixing member, and the retaining edge is connected to the end face of the ring body. The end face of the retaining edge facing the fixing member is parallel to the end face of the fixing member. The retaining edge can prevent the floating ring from moving axially, thus avoiding seal failure.
[0012] As an optional technical solution, a clamping end cap is also included. The clamping end cap has an axially penetrating cavity. The fixing member is detachably connected to the clamping end cap. The retaining edge is located between the clamping end cap and the fixing member. The cylindrical space enclosed by the ring body communicates with the cavity. The clamping end cap has a radially extending connecting hole, one end of which connects to the cavity and the other end to the outside of the clamping end cap. A sealing medium can be injected into the cavity through the connecting hole and, through the cavity, achieves a seal between the floating ring and the rotating shaft.
[0013] As an optional technical solution, the number of floating ring assemblies is two, and the two floating ring assemblies are respectively disposed at both ends of the clamping end cap along the axial direction.
[0014] As an optional technical solution, the biomimetic bristles are made of copper or nickel-based alloys.
[0015] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:
[0016] The cage-shaped bionic bristle-supported floating ring sealing structure provided by this utility model provides a buffer component including a first buffer cage in the gap between the floating ring and the fixed component. The cage wall of the first buffer cage is composed of multiple bionic bristles that can undergo elastic deformation. When the rotating bearing is subjected to radial vibration load, instantaneous impact load, or radial runout, the vibration is transmitted to the floating ring through the fluid membrane. The bionic bristles undergo elastic deformation to absorb the kinetic energy of the floating ring, thereby preventing the floating ring from impacting the inner wall of the fixed component and being damaged or deformed during this process. Attached Figure Description
[0017] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of the present invention, do not constitute a limitation thereof.
[0018] Figure 1 This is a schematic diagram of the floating ring sealing structure with cage-shaped biomimetic bristle support in this utility model.
[0019] Figure 2 for Figure 1 An exploded view of a floating ring sealing structure supported by a cage-shaped biomimetic bristles.
[0020] Figure 3 for Figure 2 A magnified view of the first buffer cage in the middle.
[0021] Explanation of reference numerals in the attached figures
[0022] Floating ring-100; Ring body-101; Edge retainer-102; Fastener-200;
[0023] Buffer component-1; First buffer cage-11; Bionic bristles-111; Connecting piece-112; Second buffer cage-12; Base plate-13;
[0024] Press-fit end cap-2; cavity-21; connecting hole-22. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] In this invention, the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0027] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a direct connection, an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0029] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.
[0030] Example 1
[0031] This embodiment provides a cage-type biomimetic bristle 111 supported floating ring sealing structure, including a floating ring 100 and a fixing member 200, wherein the fixing member 200 is sleeved on the outer periphery of the floating ring 100, and the inner wall of the fixing member 200 has a gap with the outer side of the floating ring 100, and further includes:
[0032] The buffer component 1 includes a first buffer cage 11, which is disposed in the gap between the floating ring 100 and the fixing member 200. There are multiple first buffer cages 11, which are arranged in a ring shape at intervals along the circumference of the floating ring 100. The buffer component 1 includes at least one ring of first buffer cages 11. The first buffer cage 11 includes biomimetic bristles 111, which extend along the direction from the floating ring 100 to the fixing member 200. Each first buffer cage 11 includes multiple biomimetic bristles 111, which form the cage wall of the first buffer cage 11. The biomimetic bristles 111 are used to undergo elastic deformation. In use, the rotating shaft forms a clearance fit with the inner wall of the floating ring 100, and a sealing medium is filled between the rotating shaft and the floating ring 100. The buffer component 1 can support and fix the floating ring 100, thereby keeping the floating ring 100 in the appropriate position and allowing the floating ring 100 to be distributed according to the set layers and gaps, providing a stable spatial environment for the flow of the sealing medium and the formation of the fluid film. When the rotating bearing is subjected to radial vibration load, instantaneous impact load, or radial runout, the vibration is transmitted to the floating ring 100 through the fluid film. The biomimetic bristles 111 undergo elastic deformation to absorb the kinetic energy of the floating ring 100, thereby preventing the floating ring 100 from impacting the inner wall of the fixing component 200 and being damaged or deformed during this process.
[0033] Example 2
[0034] As an optional implementation, the buffer component 1 further includes a second buffer cage 12, which is arranged along the direction from the floating ring 100 to the fixing member 200, and its height along this direction is less than that of the first buffer cage 11. Multiple second buffer cages 12 are arranged inside the first buffer cage 11. When the rotating bearing is subjected to a large radial vibration load, instantaneous impact load, or a large radial runout, the kinetic energy of the floating ring 100 during its runout within the fixing member 200 is large. In this situation, when the first buffer cage 11 buffers the floating ring 100, it may reach or exceed its yield limit, resulting in permanent deformation and causing the floating ring 100 to deviate from its set position, affecting the sealing effect. The second buffer cage 12 can supplement the buffering effect of the first buffer cage 11 before it reaches its yield limit, preventing excessive deformation of the first buffer cage 11 and thus protecting the floating ring 100.
[0035] The number of second buffer cages 12 in each first buffer cage 11 can be 4, or 2, 3, 5 or more.
[0036] As an optional implementation, the height ratio of the first buffer cage 11 to the second buffer cage 12 along the floating ring 100 to the fixing member 200 is 1:0.35. Preferably, the axial section diameter ratio of the first buffer cage 11 to the second buffer cage 12 is also 1:0.35. The second buffer cage 12 may have the same structure as the first buffer cage 11 but with different dimensions. For example, the height of the first buffer cage 11 is 1 mm, and the diameter of the top or connecting piece 112 (hereinafter referred to as the top connecting piece) is 2 mm; the height of the second buffer cage 12 is 0.8 mm, and the diameter of the top or top structure is 0.6 mm.
[0037] As an optional implementation, the first buffer cage 11 further includes a connecting piece 112, which is disposed in the gap between the floating ring 100 and the fixing member 200. The ends of the bionic bristles 111 near the floating ring 100 and / or near the fixing member 200 are connected to the edge of the connecting piece 112. The connecting piece 112 connects multiple bionic bristles 111, which helps to evenly distribute the load on the connected bionic bristles 111 and prevents several bionic bristles 111 from undergoing plastic deformation due to uneven load distribution.
[0038] As an optional implementation, the biomimetic bristles 111 are inclined circumferentially along the connecting piece 112 from one end near the floating ring 100 to the other end near the fixing member 200. When the first buffer cage 11 absorbs the kinetic energy of the floating ring 100, it is compressed radially along the floating ring 100. During this process, the inclination angle of the biomimetic bristles 111 can play a guiding role, causing the biomimetic bristles 111 to undergo elastic deformation in the inclination direction, thus preventing the biomimetic bristles 111 from being permanently deformed or broken due to random deformation.
[0039] As an optional implementation, the buffer component 1 further includes a base plate 13, which is sleeved on the outer periphery of the floating ring 100 and located in the gap between the floating ring 100 and the fixing member 200. A first buffer cage 11 is disposed on the base plate 13. The first buffer cage 11 can be formed on or mounted on the base plate 13. Mounting the base plate 13 on the outer periphery of the floating ring 100 helps to reduce manufacturing costs and manufacturing difficulty.
[0040] Optionally, at least one of the plurality of buffer bristles constituting the cage wall of the second buffer cage 12 is connected to one of the biomimetic bristles 111 of the first buffer cage 11 that covers the second buffer cage 12, thereby fixing the second buffer cage 12 relative to the first buffer cage 11, thereby preventing the first buffer cage from slipping or rolling. Moreover, such a connection method has less restriction on the axial compression / recovery of the second buffer cage 12, which is beneficial to ensure that the second buffer cage 12 can absorb the impact in a preset posture.
[0041] Specifically, since the bionic bristles 111 have the aforementioned tilt angle, the outlines of the bionic bristles 111 and the connecting piece 112 can be stamped out on the entire metal sheet. Then, the connecting piece 112 is rotated and pulled out to form the first buffer cage 11, and the remaining material forms the base plate 13.
[0042] As an optional implementation, the floating ring 100 includes a ring body 101 and a retaining edge 102. The ring body 101 passes through the fixing member 200, and the retaining edge 102 is connected to the end face of the ring body 101. The end face of the retaining edge 102 facing the fixing member 200 is parallel to the end face of the fixing member 200. The retaining edge 102 can prevent the floating ring 100 from moving axially, thus avoiding seal failure.
[0043] As an optional implementation, it also includes a clamping end cap 2, which has an axially penetrating cavity 21. The fixing member 200 is detachably connected to the clamping end cap 2, and a retaining edge 102 is located between the clamping end cap 2 and the fixing member 200. The cylindrical space enclosed by the ring body 101 communicates with the cavity 21. The clamping end cap 2 is provided with a radially extending connecting hole 22, one end of which communicates with the cavity 21 and the other end of which communicates with the outside of the clamping end cap 2. The sealing medium can be injected into the cavity 21 through the connecting hole 22 and enter the cavity 21 to achieve a seal between the floating ring 100 and the rotating shaft.
[0044] As an optional implementation, there are two floating ring assemblies, which are respectively located at both ends of the clamping end cap 2 along the axial direction.
[0045] As an alternative implementation, the biomimetic bristles 111 are made of copper or nickel-based alloys.
[0046] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0047] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A cage-type biomimetic bristle (111) supported floating ring sealing structure, comprising a floating ring assembly, the floating ring assembly including a floating ring (100) and a fixing member (200), wherein the fixing member (200) is sleeved on the outer periphery of the floating ring (100), and the inner wall of the fixing member (200) has a gap with the outer side of the floating ring (100); characterized in that, Also includes: A buffer component (1) includes a first buffer cage (11) disposed in the gap between the floating ring (100) and the fixing member (200); the number of the first buffer cages (11) is multiple, and the multiple first buffer cages (11) are arranged in a ring shape at intervals along the circumference of the floating ring (100), and the buffer component (1) includes at least one ring of the first buffer cages (11); the first buffer cage (11) includes biomimetic bristles (111), the biomimetic bristles (111) extend along the direction from the floating ring (100) to the fixing member (200), each first buffer cage (11) includes multiple biomimetic bristles (111), the multiple biomimetic bristles (111) form the cage wall of the first buffer cage (11), and the biomimetic bristles (111) are used to undergo elastic deformation.
2. The floating ring sealing structure supported by cage-shaped biomimetic bristles (111) according to claim 1, characterized in that, The buffer component (1) further includes a second buffer cage (12), which is arranged along the direction from the floating ring (100) to the fixing member (200), and its height along the direction from the floating ring (100) to the fixing member (200) is less than that of the first buffer cage (11); there are multiple second buffer cages (12), and multiple second buffer cages (12) are arranged inside the first buffer cage (11).
3. The floating ring sealing structure supported by cage-shaped biomimetic bristles (111) according to claim 2, characterized in that, The ratio of the height of the first buffer cage (11) to the second buffer cage (12) along the floating ring (100) to the fixing member (200) is 1:0.
35.
4. The cage-type biomimetic bristle (111) supported floating ring sealing structure according to claim 1, characterized in that, The first buffer cage (11) further includes a connecting piece (112), which is disposed in the gap between the floating ring (100) and the fixing member (200). The bionic bristles (111) are connected to the edge of the connecting piece (112) near the end of the floating ring (100) and / or near the end of the fixing member (200).
5. The cage-type biomimetic bristle (111) supported floating ring sealing structure according to claim 4, characterized in that, The biomimetic bristles (111) are inclined circumferentially along the connecting piece (112) from one end near the floating ring (100) to the other end near the fixing member (200).
6. The floating ring sealing structure supported by cage-shaped biomimetic bristles (111) according to claim 1, characterized in that, The buffer component (1) further includes a base plate (13), which is sleeved on the outer periphery of the floating ring (100) and located in the gap between the floating ring (100) and the fixing member (200). The first buffer cage (11) is disposed on the base plate (13).
7. The floating ring sealing structure supported by cage-shaped biomimetic bristles (111) according to claim 1, characterized in that, The floating ring (100) includes a ring body (101) and a retaining edge (102). The ring body (101) passes through the fixing member (200), and the retaining edge (102) is connected to the end face of the ring body (101). The end face of the retaining edge (102) facing the fixing member (200) is parallel to the end face of the fixing member (200).
8. The cage-type biomimetic bristle (111) supported floating ring sealing structure according to claim 7, characterized in that, It also includes a clamping end cap (2), which has an axially penetrating cavity (21), the fixing member (200) is detachably connected to the clamping end cap (2), the retaining edge (102) is located between the clamping end cap (2) and the fixing member (200), and the columnar space formed by the ring body (101) communicates with the cavity (21); the clamping end cap (2) is provided with a connecting hole (22) in the radial direction, one end of the connecting hole (22) is connected to the cavity (21) and the other end is connected to the outside of the clamping end cap (2).
9. The cage-type biomimetic bristle (111) supported floating ring sealing structure according to claim 8, characterized in that, The number of floating ring assemblies is two, and the two floating ring assemblies are respectively located at both ends of the clamping end cap (2) along the axial direction.
10. The cage-type biomimetic bristle (111) supported floating ring sealing structure according to claim 1, characterized in that, The biomimetic bristles (111) are made of copper or nickel-based alloy.