Mechanical sealing structure
By employing limiting surfaces and circumferential limiting components in the mechanical seal structure, the problem of reliable fixation between the dynamic ring assembly and the rotating shaft is solved, achieving stable synchronous rotation under high-speed rotation or complex working conditions, thereby improving sealing performance and reliability.
Patent Information
- Application Number
- CN202520737332.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-17
AI Technical Summary
In the existing technology, it is difficult to achieve reliable circumferential fixation between the dynamic ring assembly and the rotating shaft. Especially under high-speed rotation or complex working conditions, relative sliding or displacement is prone to occur, resulting in a decrease in sealing performance.
The design employs a limiting surface between the spring seat and the rotating shaft, combined with circumferential limiting components and elastic elements, to ensure synchronous rotation of the spring seat and the rotating shaft. Furthermore, a multi-stage circumferential limiting design is used to fix the moving ring seat and the spring seat, thereby achieving synchronous rotation and stability of the moving ring component and the rotating shaft.
It improves the sealing performance and stability of mechanical seals under high-speed rotation or complex working conditions, avoids wear or jamming caused by uneven circumferential force transmission, extends service life and improves operational safety.
Smart Images
Figure CN223825606U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of mechanical seals, in particular to a mechanical seal structure. BACKGROUND
[0002] Mechanical seal structures are widely used in various rotating machinery equipment as one of the key components, which mainly functions to prevent fluid leakage while ensuring efficient operation of the equipment. With the continuous development of industrial technology, mechanical seal structures play a crucial role in improving equipment performance, extending service life, and reducing maintenance costs. Whether in the fields of petroleum chemical industry, aerospace, or energy power, the progress of mechanical seal technology has greatly promoted the technological innovation and economic benefit improvement of related industries.
[0003] In the prior art, in order to realize the synchronous rotation between the dynamic ring assembly and the rotating shaft, the friction (interference fit) design is usually used to generate sufficient torque transmission between the dynamic ring assembly and the rotating shaft.
[0004] However, the above conventional means has a problem in actual application: it is difficult to achieve reliable circumferential fixation between the dynamic ring assembly and the rotating shaft, especially under high-speed rotation or complex working conditions, the dynamic ring assembly is prone to relative sliding or deviation, resulting in a decrease in sealing performance or even failure. CONTENT OF THE INVENTION
[0005] In order to realize the synchronous rotation between the dynamic ring assembly and the rotating shaft, the present application provides a mechanical seal structure.
[0006] The mechanical seal structure provided by the present application adopts the following technical scheme:
[0007] A mechanical seal structure, comprising a spring seat, a dynamic ring seat and a circumferential limiting component,
[0008] The spring seat is used to be connected to the rotating shaft, and the spring seat and the rotating shaft are axially fixed,
[0009] The spring seat is provided with a limiting surface, which is used to collide with the rotating shaft,
[0010] When the limiting surface collides with the rotating shaft, the spring seat and the rotating shaft are circumferentially fixed,
[0011] The dynamic ring seat is used to be connected to the rotating shaft, and the dynamic ring seat and the rotating shaft are axially sliding,
[0012] The circumferential limiting component is connected between the spring seat and the dynamic ring seat, and the spring seat and the dynamic ring seat are circumferentially fixed.
[0013] By adopting the technical scheme, the spring seat and the rotating shaft are fixed in the circumferential direction through the limiting surface, so that the spring seat can rotate synchronously with the rotating shaft. The circumferential limiting assembly is used to fix the spring seat and the dynamic ring seat in the circumferential direction, so that the dynamic ring seat can also rotate synchronously with the rotating shaft. The structure design effectively ensures the relative movement relationship between the components in the dynamic ring assembly of the mechanical seal structure, and improves the stability of the sealing performance.
[0014] Preferably, the circumferential limiting assembly comprises a driving piece and a driven piece,
[0015] The driving piece is connected to the spring seat,
[0016] The driven piece is connected to the dynamic ring seat, and an end of the driven piece in the circumferential direction of the dynamic ring seat is used to abut against the driving piece.
[0017] By adopting the technical scheme, when the rotating shaft rotates, the spring seat and the driving piece rotate synchronously with the rotating shaft, and the driven piece and the dynamic ring seat rotate synchronously through the limiting between the driving piece and the driven piece.
[0018] Preferably, a plurality of driving pieces are arranged at intervals in the circumferential direction of the spring seat, and the driven piece is inserted between adjacent driving pieces.
[0019] By adopting the technical scheme, the circumferential limiting stability between the dynamic ring seat and the spring seat is improved, so that the synchronous rotation of the dynamic ring assembly is more reliable during the rotation of the rotating shaft, and the wear or jamming problem caused by uneven circumferential force transmission is avoided.
[0020] Preferably, the elastic member is further arranged,
[0021] The elastic member is connected between the spring seat and the dynamic ring seat,
[0022] When the elastic member is subjected to an axial force or is not subjected to an axial force, a spacing in the circumferential direction of the dynamic ring seat exists between the driven piece and the driving piece.
[0023] By adopting the technical scheme, the elastic member can keep a certain circumferential spacing between the driven piece and the driving piece in the state of being subjected to a force or not subjected to a force, so as to avoid unnecessary contact or interference between the driven piece and the driving piece in the non-working state. At the same time, a buffering effect is provided to avoid damage between the dynamic ring seat and the spring seat due to rigid contact. This design helps to reduce the friction loss between the components, and at the same time ensures that the dynamic ring assembly has higher stability and reliability when rotating with the rotating shaft.
[0024] Preferably, the elastic member is fixedly connected to the spring seat and the dynamic ring seat.
[0025] By adopting the above technical solution, a circumferential gap is maintained between the passive and active plates of the mechanical seal, regardless of whether the elastic element is subjected to axial force or not. This prevents displacement or detachment of the elastic element during operation, thereby improving the service life and operational safety of the entire mechanical seal structure.
[0026] Preferably, when the elastic element is not under force, there is a spacing between the passive piece and the active piece along the axial direction of the moving ring seat.
[0027] By adopting the above technical solution, during use, the elastic element is compressed, causing the passive plate to approach the active plate. When the elastic element is not under force, there is a gap between the passive and active plates along the axial direction of the moving ring seat. This facilitates transportation and storage, preventing excessive axial contact between the passive and active plates, thereby reducing friction and wear between them and improving the reliability and service life of the mechanical seal structure.
[0028] Preferably, it also includes a dynamic ring.
[0029] The moving ring and the moving ring seat are circumferentially fixed.
[0030] By adopting the above technical solution, it is ensured that the moving ring can rotate synchronously with the moving ring seat.
[0031] Preferably, the moving ring is provided with a limiting groove.
[0032] The moving ring seat is connected to a limiting piece, which is used to be embedded in a limiting groove.
[0033] By adopting the above technical solution, circumferential fixation between the moving ring and the moving ring seat is achieved.
[0034] Preferably, the limiting grooves are provided at intervals along the circumference of the moving ring.
[0035] By adopting the above technical solution, multiple circumferentially spaced limiting grooves are arranged on the rotating ring, allowing the limiting pieces on the rotating ring seat to be more stably embedded in the limiting grooves, thereby enhancing the circumferential fixing effect between the rotating ring and the rotating ring seat. This design improves the stability of the mechanical seal structure during operation and reduces the risk of leakage caused by loosening or displacement of the rotating ring. At the same time, the multi-position limiting design also improves the fault tolerance of assembly, facilitating production and maintenance.
[0036] Preferably, it also includes an elastic band,
[0037] The elastic ring is located between the moving ring and the moving ring seat.
[0038] By adopting the above technical solution, the elasticity of the elastic ring can provide buffering during the rotation of the shaft and help to keep the relative position between the rotating ring and the rotating ring seat fixed, thereby ensuring that the rotating ring rotates synchronously with the shaft and improving the reliability and service life of the mechanical seal structure.
[0039] In summary, this application includes at least one of the following beneficial technical effects:
[0040] 1. By designing a limiting surface between the spring seat and the rotating shaft, the two are circumferentially fixed when the limiting surface touches the rotating shaft, ensuring synchronous rotation between the spring seat and the rotating shaft, and effectively avoiding relative sliding or offset under high-speed rotation or complex working conditions;
[0041] 2. The circumferential limiting assembly connects the spring seat and the moving ring seat, further enhancing the circumferential fixing relationship between the two and improving the stability and reliability of the mechanical seal structure;
[0042] 3. Through multi-stage circumferential limiting design, the problem of reliable fixation between the dynamic ring assembly and the rotating shaft is effectively solved, significantly improving the sealing performance and operational stability of the mechanical seal under high-speed rotation or complex working conditions. Attached Figure Description
[0043] Figure 1 This is a schematic diagram of the mechanical seal structure according to an embodiment of this application.
[0044] Figure 2 This is a schematic diagram of the mechanical seal structure when the elastic element is compressed during use.
[0045] Explanation of reference numerals in the attached drawings: 1. Spring seat; 11. Limiting surface; 2. Moving ring seat; 3. Circumferential limiting assembly; 31. Active piece; 32. Passive piece; 4. Elastic element; 5. Moving ring; 51. Limiting groove; 6. Elastic ring; 7. Limiting piece. Detailed Implementation
[0046] The present application will be further described in detail below with reference to the accompanying drawings.
[0047] Reference Figure 1 and Figure 2 This application discloses a mechanical seal structure, including a spring seat 1, a moving ring seat 2, and a circumferential limiting component 3.
[0048] Spring seat 1 is used to coaxially fit onto the outside of the rotating shaft, and the spring seat 1 and the rotating shaft are axially fixed together. The axial fixing method between spring seat 1 and the rotating shaft can be a snap ring, bushing, interference fit, etc.
[0049] The spring seat 1 is provided with a limiting surface 11, and at least two points on the limiting surface 11 are at different distances from the axis of the spring seat 1. The limiting surface 11 is used to contact the rotating shaft to achieve circumferential fixation between the spring seat 1 and the rotating shaft.
[0050] In the attached diagram: the limiting surface 11 is a plane, the limiting surface 11 is parallel to the axis of the spring seat 1, and there are two limiting surfaces 11.
[0051] The moving ring seat 2 is used for coaxial sliding sleeve to the outside of the rotating shaft.
[0052] The circumferential limiting component 3 is connected between the spring seat 1 and the moving ring seat 2, and the spring seat 1 and the moving ring seat 2 are circumferentially fixed.
[0053] The circumferential limiting component 3 includes an active piece 31 and a passive piece 32.
[0054] The driving plate 31 is connected to the side of the spring seat 1 facing the moving ring seat 2. The driven plate 32 is connected to the side of the moving ring seat 2 facing the spring seat 1.
[0055] Multiple active plates 31 are provided at equal intervals along the circumference of the spring seat 1; the space between adjacent active plates 31 is used for the insertion of passive plates 32, so that one end of the passive plate 32 along the circumference of the moving ring seat 2 is used to contact the active plates 31.
[0056] In the attached diagram: there are three active plates 31 and three passive plates 32 are evenly spaced along the circumference of the active seat.
[0057] The mechanical seal structure also includes an elastic element 4.
[0058] The elastic element 4 is located between the spring seat 1 and the moving ring seat 2. One end of the elastic element 4 is fixedly connected to the spring seat 1, and the other end of the elastic element 4 is fixedly connected to the moving ring seat 2.
[0059] When the elastic element 4 is subjected to axial force or not, there is a gap between the passive piece 32 and the active piece 31 along the circumference of the moving ring seat 2.
[0060] When the elastic element 4 is not under force, there is a gap between the passive piece 32 and the active piece 31 along the axial direction of the moving ring seat 2.
[0061] In the attached diagram: the elastic element 4 includes a helical spring, which is used to fit around the rotating shaft.
[0062] The mechanical seal structure also includes a dynamic ring 5 and an elastic ring 6.
[0063] The moving ring 5 is located on the side of the moving ring seat 2 away from the elastic element 4, and is used to fit onto the outside of the rotating shaft. The elastic ring 6 is located between the moving ring 5 and the moving ring seat 2, and is used to fit onto the outside of the rotating shaft. The surface of the moving ring 5 away from the elastic ring 6 is used to fit against the stationary ring.
[0064] The moving ring 5 and the moving ring seat 2 are circumferentially fixed. Specifically: the moving ring 5 is provided with a limiting groove 51; multiple limiting grooves 51 are provided at equal intervals along the circumference of the moving ring 5; the moving ring seat 2 is connected to a limiting piece 7, which is used to be embedded in the limiting groove 51.
[0065] It should be noted that the end of the limiting piece 7 away from the elastic element 4 is located in the limiting groove 51, so that there is a gap between the limiting piece 7 and the stationary ring, ensuring that the moving ring 5 fits into the stationary ring.
[0066] In the attached diagram: there are three limiting grooves 51, and three limiting pieces 7 are equally spaced along the moving ring seat 2;
[0067] The central angle of the limiting groove 51 is greater than the central angle of the limiting piece 7;
[0068] The elastic ring 6 can be a rubber ring.
[0069] The implementation principle of the mechanical seal structure in this application embodiment is as follows: the contact between the limiting surface 11 and the rotating shaft ensures circumferential fixation between the spring seat 1 and the rotating shaft; the cooperation between the active plate 31 and the passive plate 32 in the circumferential limiting assembly 3 achieves circumferential fixation between the spring seat 1 and the rotating ring seat 2; and the circumferential fixation between the rotating ring 5 and the rotating ring seat 2, along with the buffering effect of the elastic ring 6, achieves more stable sealing performance. This design not only effectively prevents relative sliding between the rotating ring seat 2 and the rotating shaft, but also maintains good sealing performance under complex working conditions, significantly improving the stability and reliability of the mechanical seal structure.
[0070] 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 mechanical seal structure, characterized in that, It includes a spring seat (1), a moving ring seat (2), and a circumferential limiting assembly (3). The spring seat (1) is used to connect to the rotating shaft, and the spring seat (1) and the rotating shaft are axially fixed together. The spring seat (1) is provided with a limiting surface (11), which is used to contact the rotating shaft. When the limiting surface (11) touches the rotating shaft, the spring seat (1) and the rotating shaft are circumferentially fixed. The moving ring seat (2) is used to connect to the rotating shaft, and the moving ring seat (2) and the rotating shaft slide axially. The circumferential limiting component (3) is connected between the spring seat (1) and the moving ring seat (2), and the spring seat (1) and the moving ring seat (2) are circumferentially fixed.
2. The mechanical seal structure according to claim 1, characterized in that, The circumferential limiting component (3) includes an active piece (31) and a passive piece (32). The active plate (31) is connected to the spring seat (1). The passive piece (32) is connected to the moving ring seat (2), and one end of the passive piece (32) along the circumference of the moving ring seat (2) is used to contact the active piece (31).
3. The mechanical seal structure according to claim 2, characterized in that, Multiple active plates (31) are spaced apart along the circumference of the spring seat (1), and the space between adjacent active plates (31) is used for the insertion of passive plates (32).
4. The mechanical seal structure according to claim 2, characterized in that, It also includes elastic elements (4). The elastic element (4) is connected between the spring seat (1) and the moving ring seat (2). When the elastic element (4) is subjected to axial force or not, there is a spacing between the passive piece (32) and the active piece (31) along the circumference of the moving ring seat (2).
5. The mechanical seal structure according to claim 4, characterized in that, The elastic element (4) is fixedly connected to the spring seat (1) and the moving ring seat (2).
6. The mechanical seal structure according to claim 4, characterized in that, When the elastic element (4) is not under force, there is a gap between the passive piece (32) and the active piece (31) along the axial direction of the moving ring seat (2).
7. The mechanical seal structure according to claim 1, characterized in that, It also includes the dynamic ring (5). The moving ring (5) and the moving ring seat (2) are circumferentially fixed.
8. The mechanical seal structure according to claim 7, characterized in that, The moving ring (5) is provided with a limiting groove (51). The moving ring seat (2) is connected to a limiting piece (7), which is used to be embedded in the limiting groove (51).
9. The mechanical seal structure according to claim 8, characterized in that, The limiting groove (51) is provided in multiple intervals along the circumference of the moving ring (5).
10. The mechanical seal structure according to claim 7, characterized in that, It also includes elastic coils (6). The elastic ring (6) is located between the moving ring (5) and the moving ring seat (2).