An elastomer bellows seal

Abstract

This utility model proposes an elastomeric bellows seal, comprising a stationary ring assembly and a rotating ring assembly, which abut against each other. The stationary ring assembly includes a stationary ring and a stationary ring sleeve, with the stationary ring mounted on top of the stationary ring sleeve. The rotating ring assembly includes a rotating ring, a rotating ring sleeve, a locking ring one, a locking ring two, and a spring. The rotating ring is mounted on top of the rotating ring sleeve, the locking ring one is mounted on the upper outer side of the rotating ring sleeve, and the locking ring two is mounted on the lower outer side of the rotating ring sleeve. The spring is wound around the outer wall of the rotating ring sleeve, with its top abutting against the locking ring one and its bottom abutting against the locking ring two. The locking ring one and the locking ring two lock the spring. The rotating ring sleeve of this utility model can cope with minute gap changes, providing adaptive compensation for the sealing gap, dispersing sealing pressure, and enhancing sealing contact stability; it also acts as a buffer, absorbing and dissipating external force impacts, enabling the sealing device to continue to operate normally under unstable external force environments, adapting to multi-directional displacement changes, and having a wider range of applications.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to an elastomeric bellows seal. Background Technology

[0002] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation kept in contact and sliding relative to each other under the action of fluid pressure, the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of auxiliary seals. Mechanical seals generally include dynamic ring structures and stationary ring structures.

[0003] Patent document CN221610566U discloses a mechanical seal with good pressure resistance, comprising: a fixed housing, a stationary ring, and a rotating ring. The stationary ring is fixedly fitted into a mounting hole on one side of the fixed housing, and the rotating ring is disposed on one side of the stationary ring. Both the rotating and stationary rings have mounting grooves on their adjacent sides. A stationary sealing ring and a rotating sealing ring are respectively disposed within the mounting grooves of the stationary and rotating rings. Four L-shaped grooves are evenly distributed annularly on the side wall of the mounting groove. A groove is formed at the top side of the corresponding mounting groove on both the stationary and rotating rings. A telescopic rod is fixedly bonded to the groove, and a moving rod is fixedly bonded to the outer end of the telescopic rod. This invention solves the problem that the method of fixing the stationary and rotating sealing rings with fastening screws requires tools for disassembly and assembly, and damage to the screw holes on the stationary and rotating rings leads to the complete scrapping of the stationary and rotating rings, resulting in waste.

[0004] In the above solutions, the mechanical seal has insufficient following performance, mainly relying on the elastic force of the spring to maintain the seal. It is not suitable for multi-directional displacement, has a narrow range of applications, and there is still room for improvement in terms of installation and maintenance convenience. Therefore, it is necessary to provide an elastomeric bellows seal to solve the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an elastomeric bellows seal.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An elastomeric bellows seal includes a stationary ring assembly and a rotating ring assembly, which abut against each other. The stationary ring assembly includes a stationary ring and a stationary ring sleeve, with the stationary ring mounted on top of the stationary ring sleeve. The rotating ring assembly includes a rotating ring, a rotating ring sleeve, a locking ring one, a locking ring two, and a spring. The rotating ring is mounted on top of the rotating ring sleeve, the locking ring one is mounted on the upper outer side of the rotating ring sleeve, and the locking ring two is mounted on the lower outer side of the rotating ring sleeve. The spring is wound around the outer wall of the rotating ring sleeve, with the top of the spring abutting against the locking ring one and the bottom of the spring abutting against the locking ring two, thereby locking the spring by the locking ring one and the locking ring two.

[0008] The present invention is further configured such that the outer wall array of the stationary ring sleeve is provided with corrugations.

[0009] The present invention is further configured such that the inner ring of the stationary ring sleeve is provided with a ring groove, and the stationary ring is installed in the ring groove.

[0010] The present invention is further configured such that the inner diameter of the stationary ring is the same as the inner diameter of the stationary ring sleeve.

[0011] The present invention is further configured such that the top of the moving ring sleeve is provided with a second annular groove, and the moving ring is installed in the second annular groove.

[0012] The present invention is further configured such that the inner wall and outer wall of the moving ring sleeve are provided with a plurality of annular grooves three, a locking ring one is installed in the annular groove three at the top of the outer wall of the moving ring sleeve, and a locking ring two is installed in the annular groove three at the bottom of the outer wall of the moving ring sleeve.

[0013] The present invention is further configured such that: a locking ring 1 has a locking part 1, which is vertically downward and abuts against the top of the spring; a locking ring 2 has a locking part 2, which is vertically upward and abuts against the bottom of the spring.

[0014] The present invention is further configured such that the inner diameter of the moving ring is the same as the inner diameter of the moving ring sleeve.

[0015] The present invention is further configured such that a base is provided at the bottom of the moving ring sleeve, and the moving ring sleeve is elastic.

[0016] The present invention is further configured such that the stationary ring and the rotating ring are made of alloy steel, and the stationary ring sleeve and the rotating ring sleeve are made of tetrafluoroethylene.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. The moving ring sleeve of this utility model can cope with the slight gap changes caused by factors such as vibration, temperature change, and assembly error, provide adaptive compensation for sealing gap, disperse sealing pressure, and enhance sealing contact stability.

[0019] 2. The moving ring sleeve of this utility model can play a buffering role, absorb and resolve external force impacts, so that the sealing device can still work normally under unstable external force environment, flexibly adapt to multi-directional displacement changes, move with the moving ring and maintain the sealing relationship with the stationary ring, and will not cause sealing failure problems such as sealing surface separation due to displacement, thus having a wider range of applications.

[0020] 3. Because tetrafluoroethylene itself has a low coefficient of friction, this invention can achieve uniform wear distribution, avoid excessive local wear, help maintain the integrity and performance stability of the sealing structure, and maintain a good sealing effect for a long time. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the dynamic ring assembly of this utility model.

[0022] Figure 2 This is a cross-sectional schematic diagram of the dynamic ring assembly of this utility model.

[0023] Figure 3 This is a schematic diagram of the static ring assembly of this utility model. Figure 1 .

[0024] Figure 4 This is a schematic diagram of the static ring assembly of this utility model. Figure 2 .

[0025] Figure 5 This is a cross-sectional schematic diagram of the stationary ring assembly of this utility model.

[0026] In the diagram, 1. stationary ring assembly, 11. stationary ring, 12. stationary ring sleeve, 121. corrugated ring, 122. ring groove one, 2. moving ring assembly, 21. moving ring, 22. moving ring sleeve, 221. ring groove two, 222. ring groove three, 223. base, 23. locking ring one, 231. locking part one, 24. locking ring two, 241. locking part two, 25. spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] Example 1:

[0029] In this embodiment, as Figure 1-5As shown, the present invention proposes an elastomeric bellows seal, comprising a stationary ring assembly 1 and a rotating ring assembly 2, which abut against each other. The stationary ring assembly includes a stationary ring 11 and a stationary ring sleeve 12, with the stationary ring mounted on the top of the stationary ring sleeve. The rotating ring assembly includes a rotating ring 21, a rotating ring sleeve 22, a locking ring 1 23, a locking ring 24, and a spring 25. The rotating ring is mounted on the top of the rotating ring sleeve, the locking ring 1 is mounted on the upper outer side of the rotating ring sleeve, and the locking ring 2 is mounted on the lower outer side of the rotating ring sleeve. The spring is wound around the outer wall of the rotating ring sleeve, with the top of the spring abutting against the locking ring 1 and the bottom of the spring abutting against the locking ring 2, thereby locking the spring by the locking ring 1 and the locking ring 2.

[0030] In this example, when the stationary ring is fixedly installed on the stationary part of the equipment, the rotating ring generally rotates with the moving parts of the equipment. The two are set relative to each other, and the sealing function is achieved through the tight-fitting sealing surface to prevent media leakage. During the relative movement of the rotating ring and the stationary ring, they are affected by various factors such as centrifugal force, equipment vibration, and media pressure. The spring makes adaptive adjustments according to the displacement, and the elastic rotating ring sleeve makes further adaptive adjustments, so that the rotating ring assembly and the stationary ring assembly always maintain a dynamic balance, ensuring that the sealing surface fits tightly, preventing media leakage, and achieving a reliable sealing function.

[0031] In this embodiment, the outer wall array of the stationary ring sleeve is provided with corrugations 121, which can increase the contact area with the mating parts and improve the sealing performance.

[0032] In this embodiment, the inner ring of the stationary ring is provided with a ring groove 122, and the stationary ring is installed in the ring groove 1.

[0033] In this embodiment, the inner diameter of the stationary ring is the same as the inner diameter of the stationary ring sleeve.

[0034] In this embodiment, the top of the moving ring sleeve is provided with a second annular groove 221, and the moving ring is installed in the second annular groove.

[0035] In this embodiment, the inner and outer walls of the moving ring sleeve are further provided with a plurality of annular grooves 222, a locking ring 1 is installed in the annular groove 3 at the top of the outer wall of the moving ring sleeve, and a locking ring 2 is installed in the annular groove 3 at the bottom of the outer wall of the moving ring sleeve.

[0036] In this embodiment, the locking ring one is further configured to have a locking part 231, which is vertically downward and abuts against the top of the spring; the locking ring two is configured to have a locking part 241, which is vertically upward and abuts against the bottom of the spring.

[0037] In this embodiment, the inner diameter of the moving ring is the same as the inner diameter of the moving ring sleeve.

[0038] In this embodiment, the bottom of the moving ring sleeve is provided with a base 223, and the moving ring sleeve is elastic.

[0039] In this embodiment, the stationary ring and the moving ring are made of alloy steel, and the stationary ring sleeve and the moving ring sleeve are made of polytetrafluoroethylene.

[0040] In this example, during equipment operation, slight gap changes may occur between the stationary and rotating rings due to factors such as vibration, temperature variations, and assembly errors. The PTFE rotating ring sleeve, due to its elasticity, can adaptively deform and adjust in real time according to these gap changes, ensuring a tight fit with the stationary ring at all times. This effectively compensates for any gaps, thereby enhancing the sealing effect and reducing the risk of media leakage. For example, in some high-speed rotating mechanical seal devices, slight shaft runout can be properly handled by the elasticity of the rotating ring sleeve, maintaining a good sealing condition.

[0041] In this example, under complex operating conditions, such as when equipment may be subjected to fluid impacts or intermittent external force impacts, the elasticity of the PTFE (polytetrafluoroethylene) dynamic ring sleeve can act as a buffer, absorbing and dissipating these external forces. This protects the dynamic ring and the entire sealing structure from damage or deformation due to sudden external forces, allowing the sealing device to continue operating normally under unstable external force environments. During equipment operation, the dynamic ring may experience axial, radial, or even angular displacement. The elastic dynamic ring sleeve can flexibly adapt to these multidirectional displacement changes, moving with the dynamic ring and maintaining the sealing relationship with the stationary ring, without causing sealing failure issues such as sealing surface detachment due to displacement.

[0042] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An elastomer bellows seal, characterized in that, It includes a stationary ring assembly and a rotating ring assembly, which abut against each other. The stationary ring assembly includes a stationary ring and a stationary ring sleeve, with the stationary ring mounted on top of the stationary ring sleeve. The rotating ring assembly includes a rotating ring, a rotating ring sleeve, a locking ring one, a locking ring two, and a spring. The rotating ring is mounted on top of the rotating ring sleeve, the locking ring one is mounted on the upper outer side of the rotating ring sleeve, and the locking ring two is mounted on the lower outer side of the rotating ring sleeve. The spring is wound around the outer wall of the rotating ring sleeve, with the top of the spring abutting against the locking ring one and the bottom of the spring abutting against the locking ring two. The locking ring one and the locking ring two lock the spring.

2. The elastomeric bellows seal according to claim 1, characterized in that, The outer wall of the stationary ring is corrugated.

3. The elastomeric bellows seal according to claim 1, characterized in that, The inner ring of the stationary ring sleeve has a groove, and the stationary ring is installed in the groove.

4. The elastomeric bellows seal according to claim 1, characterized in that, The inner diameter of the stationary ring is the same as the inner diameter of the stationary ring sleeve.

5. The elastomeric bellows seal according to claim 1, characterized in that, The top of the rotating ring sleeve is provided with a second annular groove, and the rotating ring is installed in the second annular groove.

6. The elastomeric bellows seal according to claim 1, characterized in that, The inner and outer walls of the moving ring sleeve are provided with several annular grooves. Locking ring one is installed in an annular groove three at the top of the outer wall of the moving ring sleeve, and locking ring two is installed in an annular groove three at the bottom of the outer wall of the moving ring sleeve.

7. The elastomeric bellows seal according to claim 1, characterized in that, Locking ring one has a locking part one, which is vertically downward and abuts against the top of the spring. Locking ring two has a locking part two, which is vertically upward and abuts against the bottom of the spring.

8. The elastomeric bellows seal according to claim 1, characterized in that, The inner diameter of the moving ring is the same as the inner diameter of the moving ring sleeve.

9. The elastomeric bellows seal according to claim 1, characterized in that, The bottom of the moving ring sleeve is equipped with a base, and the moving ring sleeve is elastic.

10. The elastomeric bellows seal according to claim 1, characterized in that, The stationary ring and the rotating ring are made of alloy steel, while the stationary ring sleeve and the rotating ring sleeve are made of polytetrafluoroethylene (PTFE).

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