Corrosion-resistant pump mechanical sealing element
By adopting corrosion-resistant materials and structural design, the problem of traditional seals being easily corroded in corrosive environments has been solved, resulting in improved sealing performance and extended service life, reduced maintenance and energy costs, and ensured safe and stable operation of the equipment.
Patent Information
- Application Number
- CN202520366702.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Traditional mechanical seals are prone to corrosion in corrosive environments, leading to decreased sealing performance, leakage, shortened service life, increased maintenance costs and energy consumption, and disruption to production continuity.
The rotating and friction rings are made of materials such as stainless steel and silicon carbide, combined with a PTFE sealing ring. The simple structure provides axial elasticity through the inner liner and spring, ensuring tight contact between the rotating and stationary rings. The use of silicon carbide friction rings and PTFE sealing rings improves corrosion resistance and sealing performance.
It effectively prevents media corrosion, reduces leakage, extends service life, reduces energy loss, improves system efficiency, simplifies maintenance, and ensures equipment safety and production continuity.
Smart Images
Figure CN223923823U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing technology, and more specifically, to a corrosion-resistant pump mechanical seal. Background Technology
[0002] Pump mechanical seals are sealing devices used to prevent fluid leakage within a pump. In corrosive environments, the materials of traditional mechanical seals are easily corroded, leading to decreased sealing performance and leakage. Leakage not only wastes fluid but can also pollute the surrounding environment. Corrosion roughens the sealing surface, increasing the friction coefficient between the rotating and stationary rings, thus accelerating wear. Wear further damages the sealing performance, creating a vicious cycle and shortening the lifespan of the mechanical seal. Leakage reduces the pump's output flow rate, lowering its efficiency. Simultaneously, to compensate for the losses caused by leakage, it may be necessary to increase the pump's operating power, thus increasing energy consumption. Due to their poor corrosion resistance, traditional mechanical seals have a short lifespan in corrosive environments, requiring frequent replacement. This not only increases the procurement cost of the seals but also requires significant manpower and time for replacement operations, leading to increased maintenance costs. When a mechanical seal leaks or is damaged, downtime for repairs is usually necessary. Frequent downtime for repairs disrupts production continuity, reduces production efficiency, and causes economic losses for the company.
[0003] Therefore, there is an urgent need for a corrosion-resistant pump mechanical seal to improve the shortcomings of existing technologies. Utility Model Content
[0004] The purpose of this invention is to provide a corrosion-resistant pump mechanical seal to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides a corrosion-resistant pump mechanical seal, including a rotating ring. The rotating ring includes a frame with a through hole on its surface. A screw is threaded into the through hole, and an inner liner is threaded to one end of the screw. A fixing hole is provided on the surface of the inner liner, and the screw is connected to the fixing hole. Two movable rings are respectively fitted on both sides of the frame. The movable ring has a groove on its surface, and a friction ring is fitted inside the groove. The friction ring has a smooth surface and is rotatably connected to a stationary ring. A second groove is provided at one end of the stationary ring, and a second friction ring is inserted into the groove. The first and second friction rings are rotatably connected.
[0006] As a further improvement to this technical solution, springs are fixedly connected to both ends of the inner liner. The springs are used to provide axial elastic force to the moving ring, so that the moving ring is always tightly pressed against the stationary ring. A connecting ring is fixedly connected to the end of the spring away from the inner liner. The connecting ring is used to support the moving ring.
[0007] As a further improvement to this technical solution, a sealing groove is provided at the end of the stationary ring away from the friction ring, and a sealing ring is fitted inside the sealing groove. The sealing ring mainly plays the role of auxiliary sealing.
[0008] As a further improvement to this technical solution, the first friction ring and the second friction ring are made of silicon carbide, and the sealing ring is made of polytetrafluoroethylene.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0010] This corrosion-resistant pump mechanical seal uses materials such as stainless steel and silicon carbide. These materials have excellent resistance to various chemical media, effectively preventing corrosion. The mechanical seal provides a better sealing effect, reducing the possibility of liquid or gas leakage, ensuring equipment safety and environmental protection. Many corrosion-resistant materials have a low coefficient of friction, reducing wear and extending the service life of the seal. Some corrosion-resistant pump mechanical seals can maintain good sealing performance under high-temperature conditions, making them suitable for high-temperature process environments. Compared to traditional seals, the structural design of corrosion-resistant pump mechanical seals is usually simpler, making replacement and maintenance more convenient and faster. Good sealing performance can reduce pump energy loss, improve the overall efficiency of the system, and save energy and operating costs. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of the embodiment;
[0012] Figure 2 This is a schematic diagram of the overall unfolded structure of the embodiment;
[0013] Figure 3 This is a schematic diagram of the dynamic ring structure in an embodiment;
[0014] Figure 4 This is a schematic diagram of the stationary ring structure in an embodiment.
[0015] The meanings of the labels in the diagram are as follows:
[0016] 1. Moving ring; 10. Frame; 11. Liner; 12. Fixing hole; 13. Screw; 14. Spring; 15. Connecting ring; 16. Moving ring; 17. Groove one; 18. Friction ring one;
[0017] 2. Stationary ring; 20. Groove II; 21. Friction ring II; 22. Sealing groove; 23. Sealing ring. Detailed Implementation
[0018] 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.
[0019] Please see Figures 1-4 As shown, this embodiment provides a corrosion-resistant pump mechanical seal, including a rotating ring 1. The rotating ring 1 includes a frame 10. The surface of the frame 10 is provided with a through hole, and a screw 13 is threaded into the through hole. One end of the screw 13 is threaded into a liner 11. The surface of the liner 11 is provided with a fixing hole 12. The screw 13 is connected to the fixing hole 12. A movable ring 1 is sleeved on both sides of the frame 10. The surface of the movable ring 1 is provided with a groove 16. A friction ring 18 is sleeved in the groove 16. The surface of the friction ring 18 is smooth. A stationary ring 2 is rotatably connected to the friction ring 18. One end of the stationary ring 2 is provided with a groove 20. A friction ring 21 is inserted into the groove 20. The friction ring 18 and the friction ring 21 are rotatably connected.
[0020] The working principle described above is as follows: First, the frame 10 of the moving ring 1 has through holes on its surface, which facilitates connection with the inner liner 11 via screws 13, enhancing the stability of the seal. The fixing holes 12 of the inner liner 11 are connected to the screws 13, ensuring that it is firmly fixed to the frame 10 and preventing loosening during operation. The movable rings 1 on both sides of the moving ring 1 cooperate with the friction ring 18 via groove 16. The smooth surface of the friction ring 18 ensures smooth rotational connection with the stationary ring 2. The friction ring 21 is inserted into the groove 20 at one end of the stationary ring 2, forming an effective rotational connection between the friction ring 18 and the friction ring 21. Thus, during pump operation, the dynamic sealing surface can effectively isolate the fluid inside the pump from the external environment, preventing leakage. At the same time, the rotation between the friction rings reduces frictional loss, improves sealing performance and durability, and ensures safe and stable operation of the pump under harsh conditions.
[0021] To enhance sealing, in this embodiment, springs 14 are fixedly connected to both ends of the liner 11. Springs 14 provide axial elastic force to the rotating ring 1, ensuring that the rotating ring 1 is always tightly pressed against the stationary ring 2. A connecting ring 15 is fixedly connected to the end of the spring 14 away from the liner 11, which supports the moving ring 1. The springs 14 fixedly connected to both ends of the liner 11 provide axial elastic force to the rotating ring 1, effectively preventing media leakage. The elastic force of the springs 14 allows the rotating ring 1 to automatically adjust its position during pump operation to adapt to small displacements caused by temperature changes or pressure fluctuations. By maintaining tight contact of the rotating ring 1, the springs 14 not only enhance sealing performance but also extend the service life of the seals, ensuring stable operation of the pump under high loads and harsh conditions.
[0022] In order to isolate it from the outside world, in this embodiment, the end of the stationary ring 2 away from the friction ring 21 is provided with a sealing groove 22. A sealing ring 23 is fitted inside the sealing groove 22. The sealing ring 23 mainly plays the role of auxiliary sealing. The material used for the sealing ring 23 has good corrosion resistance and low friction characteristics. The presence of the sealing ring 23 can further reduce the risk of leakage of the medium in the pump and enhance the overall sealing effect. The design of the sealing groove 22 ensures that the sealing ring 23 can always maintain an appropriate compression state during operation to resist the intrusion of liquid or gas.
[0023] To ensure corrosion resistance, in this embodiment, friction ring 18 and friction ring 21 are made of silicon carbide, and sealing ring 23 is made of polytetrafluoroethylene. Silicon carbide has excellent wear resistance and corrosion resistance, while polytetrafluoroethylene has excellent chemical stability, oil resistance, solvent resistance, and moisture resistance, as well as a low coefficient of friction, thereby extending the service life of the seals.
[0024] In this embodiment, a corrosion-resistant pump mechanical seal is used in the following way: First, the frame 10 of the rotating ring 1 has through holes on its surface, which facilitates connection with the inner liner 11 via screws 13, enhancing the stability of the seal. The fixing holes 12 of the inner liner 11 are connected to the screws 13, ensuring that it is firmly fixed to the frame 10 and preventing loosening during operation. The springs 14 fixedly connected to both ends of the inner liner 11 provide axial elasticity to the rotating ring 1, effectively preventing media leakage. The elasticity of the springs 14 allows the rotating ring 1 to automatically adjust its position during pump operation, adapting to small displacements caused by temperature changes or pressure fluctuations. By maintaining tight contact of the rotating ring 1, the springs 14 not only enhance the sealing performance but also extend the service life of the seal, ensuring stable pump operation under high loads and harsh conditions. The movable rings 1 on both sides of the rotating ring 1 are connected via... The groove 16 mates with the friction ring 18. The smooth surface of the friction ring 18 ensures a smooth rotational connection with the stationary ring 2. The friction ring 21 is inserted into the groove 20 at one end of the stationary ring 2, forming an effective rotational connection between the friction ring 18 and the friction ring 21. Thus, during pump operation, the dynamic sealing surface can effectively isolate the fluid inside the pump from the external environment. The material used for the sealing ring 23 has good corrosion resistance and low friction characteristics. The presence of the sealing ring 23 can further reduce the risk of leakage of the medium inside the pump and enhance the overall sealing effect. The design of the sealing groove 22 ensures that the sealing ring 23 can always maintain an appropriate compression state during operation, resisting the intrusion of liquid or gas and preventing leakage. At the same time, the rotation between the friction rings reduces friction loss, improves sealing performance and durability, and ensures the safe and stable operation of the pump under harsh conditions.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A corrosion-resistant pump mechanical seal, comprising a dynamic ring (1), characterized in that: The moving ring (1) includes a frame (10), the surface of the frame (10) is provided with a through hole, a screw (13) is threaded into the through hole, one end of the screw (13) is threaded into a liner (11), the surface of the liner (11) is provided with a fixing hole (12), the screw (13) is connected to the fixing hole (12), the two sides of the frame (10) are respectively fitted with a movable ring (1), the surface of the movable ring (1) is provided with a groove (16), a friction ring (18) is fitted in the groove (16), the surface of the friction ring (18) is smooth, the friction ring (18) is rotatably connected to a stationary ring (2), one end of the stationary ring (2) is provided with a groove (20), a friction ring (21) is inserted in the groove (20), the friction ring (18) and the friction ring (21) are rotatably connected.
2. The corrosion-resistant pump mechanical seal according to claim 1, characterized in that: Springs (14) are fixedly connected to both ends of the liner (11). The springs (14) are used to provide axial elastic force to the moving ring (1) so that the moving ring (1) is always pressed tightly against the stationary ring (2). A connecting ring (15) is fixedly connected to the end of the spring (14) away from the liner (11). The connecting ring (15) is used to support the moving ring (1).
3. The corrosion-resistant pump mechanical seal according to claim 1, characterized in that: The stationary ring (2) is provided with a sealing groove (22) at one end away from the friction ring (21). A sealing ring (23) is fitted inside the sealing groove (22). The sealing ring (23) mainly plays the role of auxiliary sealing.
4. The corrosion-resistant pump mechanical seal according to claim 3, characterized in that: The first friction ring (18) and the second friction ring (21) are made of silicon carbide, and the sealing ring (23) is made of polytetrafluoroethylene.