Balanced mechanical sealing structure
By introducing friction rings and limit rings into the mechanical sealing structure, and setting concave rails and greases on one side of the friction ring, the problem of increased wear of the dynamic and static rings when the equipment is under high pressure is solved, and the effect of reducing friction and extending service life is achieved.
Patent Information
- Application Number
- CN202422394917.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In mechanical sealing devices, when the pressure of the equipment is too high, the sliding friction between the moving ring and the static ring increases, resulting in increased wear of the moving ring and affecting the service life of the mechanical seal.
A balanced mechanical seal structure is designed to reduce friction area and friction force and reduce wear by introducing friction rings and limit rings into the static sealing assembly and dynamic sealing assembly, and providing concave rails and grease on one side of the friction ring.
It effectively reduces the friction between the moving ring and the friction ring, reduces wear and extends the service life of mechanical seals.
Smart Images
Figure CN223019413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical seals, and more specifically, to a balanced mechanical seal structure. Background Art
[0002] The balanced mechanical seal is an important sealing device and is widely used in mechanical equipment in industries such as chemical engineering, petroleum, metallurgy, food, and pharmaceuticals.
[0003] The stationary ring and the rotating ring are respectively installed at the fixed end and the rotating end, and a sealing gap is formed between them. During use, if the pressure of the equipment is too high, the medium presses on the rotating ring and the stationary ring. When the shaft rotates, the sliding friction force between the rotating ring and the stationary ring is relatively large. After long-term use, the wear of the stationary and rotating rings is likely to increase, affecting the service life of the mechanical seal. How to invent a balanced mechanical seal structure to improve these problems has become an urgent problem for those skilled in the art. Summary of the Utility Model
[0004] To make up for the above deficiencies, the utility model provides a balanced mechanical seal structure, aiming to improve the problem that the sliding friction force between the rotating ring and the stationary ring is increased, which easily causes an increase in the wear of the stationary and rotating rings.
[0005] The utility model is implemented as follows: a balanced mechanical seal structure, including a shaft rod; a mechanical seal mechanism, the mechanical seal mechanism includes a static seal component and a dynamic seal component, the static seal component and the dynamic seal component are rotationally abutted in a limited manner, the static seal component and the dynamic seal component are respectively sleeved on the shaft rod, the static seal component includes a stationary ring and a friction ring, the friction ring is rotationally installed in a limited manner on one side of the stationary ring, the dynamic seal component includes a rotating ring, and the dynamic seal component abuts against the other side of the friction ring.
[0006] In a preferred technical solution of the utility model, a static ring seal ring is sleeved on the outside of one end of the stationary ring, and a pin position groove is provided at one end of the stationary ring located outside the static ring seal ring.
[0007] In a preferred technical solution of the utility model, a concave rail is provided at one end of the friction ring, and the other end of the friction ring is rotationally and snap-connected with the stationary ring in a limited manner.
[0008] In a preferred technical solution of the utility model, multiple groups of the concave rails are provided, and the multiple concave rails are equally divided and arranged on one side of the friction ring.
[0009] In a preferred technical solution of the utility model, limiting rings are respectively fixedly connected to the upper and lower sides of the end of the friction ring that is snap-connected with the stationary ring, and the limiting rings are snap-connected with the stationary ring.
[0010] In a preferred technical solution of the present utility model, the limiting ring is a semi-circular ring, and the limiting ring is fixedly installed on the inner and outer rings of the end of the friction ring. A chute matching the friction ring and the limiting ring is provided on one side of the static ring, and a lubricating grease is arranged in the chute on one side of the static ring.
[0011] In a preferred technical solution of the present utility model, the dynamic seal assembly further includes a push ring. The dynamic ring is rotatably installed on one side of the push ring, and a spring seat is installed on the other side of the push ring in a limited sliding manner. A dynamic ring sealing ring is arranged inside the push ring.
[0012] In a preferred technical solution of the present utility model, one end of the push ring is slidably sleeved on the spring seat. The end of the spring seat is equally provided with grooves, and springs are arranged in the grooves. The other ends of the springs abut against the push ring. Grooves are provided on the outside of the push ring.
[0013] In a preferred technical solution of the present utility model, grooves are provided on the inner ring of the push ring. A plurality of dynamic ring sealing rings are provided, and the plurality of dynamic ring sealing rings are equally installed in the grooves on the inner ring of the push ring.
[0014] In a preferred technical solution of the present utility model, a support ring is arranged between every two dynamic ring sealing rings, and the support ring is fixedly installed in the grooves on the inner ring of the push ring.
[0015] The beneficial effects of the present utility model are as follows: A balanced mechanical seal structure obtained by the above design of the present utility model. During use, after the static seal assembly and the dynamic seal assembly are installed, during normal use, the dynamic ring rotates and rubs against the friction ring. The friction ring will cooperate with the limiting ring and the lubricating grease to rotate slightly. At the same time, a concave rail is provided on one side of the friction ring, which reduces the friction area, so that when the dynamic ring rotates, it is not easy to drive the friction ring to rotate and rubs against the friction ring. When the pressure is large, the frictional force will increase. The cooperation of the limiting ring and the lubricating grease rotating on one side of the static ring reduces the wear of the friction ring and the dynamic ring, increases the service life, and enables the friction ring and the dynamic ring to rotate stably. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1 is a schematic structural diagram of the mechanical seal mechanism provided by the embodiment of the present utility model;
[0018] Figure 2 Schematic cross-sectional structure diagram of the mechanical seal mechanism provided by an embodiment of the present utility model;
[0019] Figure 3 Schematic structure diagram of the static seal assembly provided by an embodiment of the present utility model;
[0020] Figure 4 Schematic structure diagram of the dynamic seal assembly provided by an embodiment of the present utility model.
[0021] In the figure: 110 - shaft rod; 200 - mechanical seal mechanism; 210 - static seal assembly; 211 - stationary ring; 212 - friction ring; 213 - stationary ring sealing ring; 214 - limiting ring; 215 - concave rail; 220 - dynamic seal assembly; 221 - push ring; 222 - moving ring; 223 - spring seat; 225 - spring; 226 - moving ring sealing ring; 227 - support ring. Specific embodiments
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.
[0023] Please refer to Figure 1 and Figure 2 , the present utility model provides a technical solution: a balanced mechanical seal structure, including
[0024] shaft rod 110; a mechanical seal mechanism 200, the mechanical seal mechanism 200 includes a static seal assembly 210 and a dynamic seal assembly 220, the static seal assembly 210 and the dynamic seal assembly 220 are rotationally and limitedly abutted, the static seal assembly 210 and the dynamic seal assembly 220 are respectively sleeved on the shaft rod 110, the static seal assembly 210 includes a stationary ring 211 and a friction ring 212, the friction ring 212 is rotationally and limitedly installed on one side of the stationary ring 211, the dynamic seal assembly 220 includes a moving ring 222, and the dynamic seal assembly 220 abuts against the other side of the friction ring 212.
[0025] Please refer to Figure 3 and Figure 4, an outer ring of one end of the stationary ring 211 is sleeved with a stationary ring sealing ring 213, and a pin position groove is arranged at one end of the stationary ring 211 located outside the stationary ring sealing ring 213. One end of the friction ring 212 is provided with a concave rail 215, and the other end of the friction ring 212 is rotationally and limit-connected with the stationary ring 211. Multiple groups of concave rails 215 are provided, and the multiple concave rails 215 are equally arranged on one side of the friction ring 212. Upper and lower sides of one end of the friction ring 212 clamped with the stationary ring 211 are respectively fixedly connected with limit rings 214, and the limit rings 214 are clamped with the stationary ring 211. The multiple concave rails 215 reduce the contact surface between the friction ring 212 and the moving ring 222, avoiding long-term wear. At the same time, the fitting surface between the moving ring 222 and the concave rail 215 is higher after long-term wear, increasing the service life.
[0026] The limit ring 214 is a semi-circular ring, and the limit ring 214 is fixedly installed on the inner and outer circles of the end of the friction ring 212. A sliding groove matched with the friction ring 212 and the limit ring 214 is formed on one side of the stationary ring 211. Grease is arranged in the sliding groove on one side of the stationary ring 211. When the friction between the moving ring 222 and the friction ring 212 is large, the friction ring 212 cooperates with the limit ring 214 to slide on the side wall of the stationary ring 211, reducing the friction between the friction ring 212 and the moving ring 222 and making it more stable in use.
[0027] The dynamic seal assembly 220 further includes a push ring 221. The moving ring 222 is rotatably installed on one side of the push ring 221. A spring seat 223 is installed on the other side of the push ring 221 in a limit sliding manner. A moving ring sealing ring 226 is arranged inside the push ring 221. One end of the push ring 221 is slidably sleeved on the spring seat 223. Grooves are equally arranged at the end of the spring seat 223, and a spring 225 is arranged in the groove. The other end of the spring 225 abuts against the push ring 221. A groove is formed on the outer part of the push ring 221. A groove is formed on the inner ring of the push ring 221. Multiple moving ring sealing rings 226 are provided, and the multiple moving ring sealing rings 226 are equally installed in the grooves on the inner ring of the push ring 221. A support ring 227 is arranged between every two moving ring sealing rings 226, and the support ring 227 is fixedly installed in the groove on the inner ring of the push ring 221. The multiple moving ring sealing rings 226 and the support rings 227 improve the sealing effect and the installation stability at the same time, disperse the middle groove of the push ring 221, and disperse the supporting force at the same time.
[0028] Working principle: After installing the static seal assembly 210 and the dynamic seal assembly 220, during normal use, the dynamic ring 222 rotates and rubs against the friction ring 212. The friction ring 212 will cooperate with the limit ring 214 and grease to rotate slightly. At the same time, a concave rail 215 is provided on one side of the friction ring 212, which reduces the friction area, making it difficult for the dynamic ring 222 to drive the friction ring 212 to rotate when it rotates and rubs against the friction ring 212. When the pressure is positive, the frictional force will increase. The rotation of the limit ring 214 and grease on one side of the static ring 211 reduces the wear of the friction ring 212 and the dynamic ring 222, and increases the service life.
[0029] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A balanced mechanical seal structure, characterized in that: include Axle rod; A mechanical sealing mechanism, wherein the mechanical sealing mechanism comprises a static sealing assembly and a dynamic sealing assembly, wherein the static sealing assembly and the dynamic sealing assembly are in limited rotation abutment with each other, wherein the static sealing assembly and the dynamic sealing assembly are respectively sleeved on the shaft rod, wherein the static sealing assembly comprises a static ring and a friction ring, wherein the friction ring is limited rotationally mounted on one side of the static ring, wherein the dynamic sealing assembly comprises a dynamic ring, wherein the dynamic sealing assembly abuts against the other side of the friction ring.
2. The balanced mechanical seal structure according to claim 1, characterized in that: A static ring sealing ring is sleeved on the outside of one end of the static ring, and a pin groove is arranged on one end of the static ring located outside the static ring sealing ring.
3. The balanced mechanical seal structure according to claim 2, characterized in that: One end of the friction ring is provided with a concave track, and the other end of the friction ring is engaged with the stationary ring for limited rotation.
4. The balanced mechanical seal structure according to claim 3, characterized in that: The concave rails are provided in multiple groups, and the multiple concave rails are equally arranged on one side of the friction ring.
5. The balanced mechanical seal structure according to claim 3, characterized in that: The upper and lower sides of one end of the friction ring that is clamped with the static ring are respectively fixedly connected to limit rings, and the limit ring is clamped with the static ring.
6. The balanced mechanical seal structure according to claim 5, characterized in that: The limit ring is a semi-arc ring, which is fixedly installed on the inner ring and the outer ring at the end of the friction ring. A sliding groove that matches the friction ring and the limit ring is opened on one side of the static ring, and grease is arranged in the sliding groove on one side of the static ring.
7. The balanced mechanical seal structure according to claim 1, characterized in that: The dynamic seal assembly also includes a push ring, which is rotatably mounted on one side of the push ring, and a spring seat is slidably mounted on the other side of the push ring, and a dynamic ring sealing ring is arranged inside the push ring.
8. The balanced mechanical seal structure according to claim 7, characterized in that: One end of the push ring is slidably sleeved on the spring seat, and the end of the spring seat is equally and separately provided with grooves, a spring is arranged in the groove, the other end of the spring abuts against the push ring, and the outside of the push ring is opened.
9. The balanced mechanical seal structure according to claim 7, characterized in that: The inner ring of the push ring is provided with a groove, and a plurality of dynamic ring sealing rings are provided, and the plurality of dynamic ring sealing rings are equally installed in the groove of the inner ring of the push ring.
10. The balanced mechanical seal structure according to claim 9, characterized in that: A support ring is arranged between every two dynamic ring sealing rings, and the support ring is fixedly installed in the groove of the inner ring of the push ring.