Mechanical seal
By designing a mechanical seal structure with adjustable sealing pressure, the problem of poor sealing effect caused by the inability to adjust the sealing pressure of existing mechanical seals is solved, realizing flexible adjustment of sealing pressure and protection of the equipment's internal structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU CHONGQI MASCH EQUIP CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-28
AI Technical Summary
Existing mechanical seals cannot adjust the sealing pressure, resulting in poor sealing performance and problems such as media leakage or external impurities entering the equipment.
A mechanical seal structure including a stationary ring and a rotating ring is designed. The rotating ring moves to adjust the sealing pressure through the cooperation of the rotating sleeve, spring and guide sleeve in the compression assembly. The sealing pressure is adjusted by the change of spring compression. The guide groove guides and prevents deflection. Combined with the fixed connection of screw and convex ring, the adjustable sealing pressure is achieved.
It achieves adjustable sealing pressure, solves the problem of poor sealing effect caused by excessively high or low sealing pressure, and prevents media leakage and external impurities from entering the equipment.
Smart Images
Figure CN224174548U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing technology, specifically to a mechanical seal. Background Technology
[0002] A mechanical seal is a device that prevents fluid leakage. It consists of at least one pair of end faces perpendicular to the axis of rotation. Under the action of fluid pressure, the elastic force of the compensation mechanism, and the cooperation of auxiliary seals, these end faces remain in contact and slide relative to each other. Mechanical seals are shaft sealing devices for rotating fluid machinery and are commonly used in equipment such as centrifugal pumps, centrifuges, reactors, and compressors.
[0003] Mechanical seals have varying sealing requirements under different media, temperatures, and pressures. Appropriate sealing pressure is crucial for ensuring the normal operation of a mechanical seal. Current mechanical seals cannot adjust the sealing pressure; when the sealing pressure is too high or too low, poor sealing performance can occur, leading to media leakage or the entry of external impurities into the equipment. Utility Model Content
[0004] The purpose of this invention is to provide a mechanical seal to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical seal, comprising a stationary ring and a rotating ring located to the right of the stationary ring, wherein the stationary ring and the rotating ring are in contact and connected, and a clamping assembly is provided on the rotating ring, the clamping assembly comprising an mounting sleeve, a rotating sleeve, a spring A, a guide sleeve fixedly disposed to the right of the rotating ring, and a pressure ring fixedly disposed to the left of the rotating sleeve, wherein the inner side of the mounting sleeve and the outer side of the rotating sleeve are both provided with threads, the rotating sleeve is screwed into the mounting sleeve and threadedly connected to the mounting sleeve, the left and right ends of the spring A are fixedly connected to the rotating ring and the pressure ring respectively, and a guide groove matching the guide sleeve is opened on the left side wall of the mounting sleeve, the guide sleeve is inserted into the guide groove and slidably connected to the mounting sleeve.
[0006] Preferably, the clamping assembly further includes a convex ring A and a screw fixedly disposed on the right side of the rotating sleeve. The diameter of the convex ring A is larger than the diameter of the rotating sleeve. The convex ring A has an arc-shaped groove extending through it on both sides. A screw hole is provided on the right side wall of the mounting sleeve. The screw is inserted into the arc-shaped groove and screwed into the screw hole to fix and connect with the convex ring A and the mounting sleeve.
[0007] Preferably, the clamping assembly further includes a spring B sleeved on the screw and a pressure pad fixedly disposed on the left side of the spring B. The right end of the spring B is fixedly connected to the screw head. After the screw is inserted into the arc groove and screwed into the screw hole, the pressure pad is fixedly connected to the convex ring A.
[0008] Preferably, the clamping assembly further includes a sealing ring A and a sealing ring B. The inner wall of the moving ring and the inner wall of the pressing ring are respectively provided with sealing groove A and sealing groove B. The sealing ring A and sealing ring B are located inside the sealing groove A and sealing groove B, respectively, and are in contact with the moving ring and the pressing ring.
[0009] Preferably, the stationary ring is provided with a protective component, which includes a convex ring B fixedly disposed on the outside of the stationary ring and a protective sleeve. The protective sleeve has a plurality of filter holes. The outer side of the convex ring B and the inner side of the protective sleeve are both provided with threads. The protective sleeve is screwed into the convex ring B and is threadedly connected to the convex ring B.
[0010] Preferably, a convex ring C is fixedly provided on the outer side of the moving ring, and the right end of the protective sleeve is in contact with the convex ring C.
[0011] Preferably, the outer side of the convex ring A is provided with anti-slip texture.
[0012] The beneficial effects of this utility model are as follows: When using this utility model, the rotating sleeve is screwed into the mounting sleeve and threadedly connected to it. The left and right ends of spring A are respectively fixedly connected to the moving ring and the pressure ring, connecting the moving ring to the rotating sleeve. The guide sleeve is inserted into the guide groove and slidably connected to the mounting sleeve, connecting the moving ring to the mounting sleeve. When the sealing pressure needs to be adjusted, the rotating sleeve is rotated to make it rotate within the mounting sleeve. The rotating sleeve will drive spring A and the moving ring to move. When the sealing pressure needs to be increased, the rotating sleeve is rotated to make spring A and the moving ring move to the left. When the moving ring contacts the stationary ring, the compression of spring A increases, and the spring force increases accordingly, thus increasing the sealing pressure. When the sealing pressure needs to be decreased, the rotating sleeve is rotated to make spring A and the moving ring move to the right. When in contact with the stationary ring, the compression of spring A decreases, and the spring force decreases accordingly, thus reducing the sealing pressure. When the rotating ring moves, the guide sleeve slides in the guide groove, guiding the rotating ring and preventing it from tilting, thereby preventing the spring from deflecting. After the rotating ring and spring A are adjusted, the screw is inserted into the arc-shaped groove and screwed into the screw hole, fixing the screw to the convex ring A and the mounting sleeve, thus fixing the convex ring A and the rotating sleeve and preventing them from rotating during subsequent use. In summary, this utility model has the beneficial effect of adjusting the sealing pressure, solving the problem that existing mechanical seals cannot adjust the sealing pressure, and that when the sealing pressure is too high or too low, the sealing effect is poor, leading to media leakage or the entry of external impurities into the equipment. Attached Figure Description
[0013] Appendix Figure 1 This is a front view of the present invention;
[0014] Appendix Figure 2 This is a schematic diagram of the left side structure of this utility model;
[0015] Appendix Figure 3This is a schematic diagram of the right side structure of this utility model;
[0016] Appendix Figure 4 This is a top view of the present invention;
[0017] Appendix Figure 5 For the appendix Figure 4 Sectional view at point AA.
[0018] In the diagram: 1. Stationary ring; 2. Moving ring; 3. Mounting sleeve; 4. Rotating sleeve; 5. Spring A; 6. Guide sleeve; 7. Pressure ring; 8. Guide groove; 9. Convex ring A; 10. Screw; 11. Arc groove; 12. Screw hole; 13. Spring B; 14. Pressure pad; 15. Sealing ring A; 16. Sealing ring B; 17. Sealing groove A; 18. Sealing groove B; 19. Convex ring B; 20. Protective sleeve; 21. Filter hole; 22. Convex ring C; 23. Anti-slip texture. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0020] like Figure 1-5As shown, this utility model discloses a mechanical seal, including a stationary ring 1 and a rotating ring 2 located to the right of the stationary ring 1. The stationary ring 1 and the rotating ring 2 are in contact and connected. The rotating ring 2 is provided with a clamping assembly, which includes a mounting sleeve 3, a rotating sleeve 4, a spring A5, a guide sleeve 6 fixedly disposed to the right of the rotating ring 2, and a pressure ring 7 fixedly disposed to the left of the rotating sleeve 4. The inner side of the mounting sleeve 3 and the outer side of the rotating sleeve 4 are both provided with threads. The rotating sleeve 4 is screwed into the mounting sleeve 3 and threadedly connected to the mounting sleeve 3. The left and right ends of the spring A5 are fixedly connected to the rotating ring 2 and the pressure ring 7, respectively. A guide groove 8 matching the guide sleeve 6 is opened on the left side wall of the mounting sleeve 3. The guide sleeve 6 is inserted into the guide groove 8 and slidably connected to the mounting sleeve 3. In use, the rotating sleeve 4 is screwed into the mounting sleeve 3 and threadedly connected. The left and right ends of the spring A5 are fixedly connected to the moving ring 2 and the pressure ring 7 respectively, connecting the moving ring 2 to the rotating sleeve 4. The guide sleeve 6 is inserted into the guide groove 8 and slidably connected to the mounting sleeve 3, connecting the moving ring 2 to the mounting sleeve 3. When adjusting the sealing pressure, the rotating sleeve 4 is rotated within the mounting sleeve 3, causing the spring A5 and the moving ring 2 to move. When increasing the sealing pressure, the rotating sleeve 4 is rotated, causing the spring A5 and the moving ring 2 to move to the left. When the moving ring 2 contacts the stationary ring 1, the compression of the spring A5 increases, and the spring force increases accordingly, thus increasing the sealing pressure. When decreasing the sealing pressure, the rotating sleeve 4 is rotated, causing the spring A5 and the moving ring 2 to move to the right, connecting the moving ring 2 to the stationary ring 1. 1. When the contact connection is established, the compression of spring A5 decreases, and the spring force decreases accordingly, thus reducing the sealing pressure. When the moving ring 2 moves, the guide sleeve 6 slides in the guide groove 8, guiding the moving ring 2 to prevent it from tilting, thereby preventing the spring from deflecting. After the moving ring 2 and spring A5 are adjusted, the screw 10 is inserted into the arc groove 11 and screwed into the screw hole 12, fixing the screw 10 to the convex ring A9 and the mounting sleeve 3, thus fixing the convex ring A9 and the rotating sleeve 4 and preventing them from rotating during subsequent use. In summary, this utility model has the beneficial effect of adjusting the sealing pressure, solving the problem that existing mechanical seals cannot adjust the sealing pressure, and that when the sealing pressure is too high or too low, the sealing effect is poor, leading to media leakage or the entry of external impurities into the equipment.
[0021] Preferably, the clamping assembly further includes a convex ring A9 and a screw 10 fixedly disposed on the right side of the rotating sleeve 4. The diameter of the convex ring A9 is larger than the diameter of the rotating sleeve 4. The convex ring A9 has an arc-shaped groove 11 extending through it from left to right. The mounting sleeve 3 has a screw hole 12 on its right side wall. The screw 10 is inserted into the arc-shaped groove 11 and screwed into the screw hole 12 to fix it to the convex ring A9 and the mounting sleeve 3. Because the convex ring A9 has an arc-shaped groove 11 extending through it from left to right, and the mounting sleeve 3 has a screw hole 12 on its right side wall, inserting the screw 10 into the arc-shaped groove 11 and screwing it into the screw hole 12 fixes the screw 10 to the convex ring A9 and the mounting sleeve 3, thus fixing the convex ring A9 and the rotating sleeve 4. When the rotating sleeve 4 needs to rotate, the screw 10 is loosened, and when the rotating sleeve 4 rotates, the screw 10 will be located in the arc-shaped groove 11, which facilitates the rotation of the rotating sleeve 4.
[0022] Preferably, the clamping assembly further includes a spring B13 sleeved on the screw 10 and a pressure washer 14 fixedly disposed on the left side of the spring B13. The right end of the spring B13 is fixedly connected to the screw head of the screw 10. After the screw 10 is inserted into the arc-shaped groove 11 and screwed into the screw hole 12, the pressure washer 14 is fixedly connected to the convex ring A9. Since the right end of the spring B13 is fixedly connected to the screw head of the screw 10, and the pressure washer 14 is fixedly disposed on the left side of the spring B13, when the screw 10 is inserted into the arc-shaped groove 11 and screwed into the screw hole 12, the pressure washer 14 will press on the convex ring A9 and be fixedly connected to the convex ring A9, thus preventing the screw 10 from loosening.
[0023] Preferably, the clamping assembly further includes a sealing ring A15 and a sealing ring B16. Sealing grooves A17 and B18 are respectively formed on the inner wall of the moving ring 2 and the inner wall of the pressure ring 7. The sealing rings A15 and B16 are located inside the sealing grooves A17 and B18, respectively, and are in contact with the moving ring 2 and the pressure ring 7. Because the sealing rings A15 and B16 are located inside the sealing grooves A17 and B18, respectively, and are in contact with the moving ring 2 and the pressure ring 7, they enhance the sealing performance.
[0024] Preferably, the stationary ring 1 is provided with a protective assembly, which includes a convex ring B19 fixedly disposed on the outer side of the stationary ring 1 and a protective sleeve 20. The protective sleeve 20 has a plurality of filter holes 21. Both the outer side of the convex ring B19 and the inner side of the protective sleeve 20 are provided with threads, and the protective sleeve 20 is screwed into the convex ring B19 and threadedly connected to the convex ring B19. Because the protective sleeve 20 has a plurality of filter holes 21, it plays a role in blocking impurities; because the protective sleeve 20 is screwed into the convex ring B19 and threadedly connected to the convex ring B19, it facilitates the installation of the protective sleeve 20.
[0025] Preferably, a convex ring C22 is fixedly provided on the outer side of the moving ring 2, and the right end of the protective sleeve 20 is in contact with the convex ring C22. Since the right end of the protective sleeve 20 is in contact with the convex ring C22, it serves to protect the connection between the stationary ring 1 and the moving ring 2.
[0026] Preferably, the outer side of the convex ring A9 is provided with anti-slip texture 23. Rotating the convex ring A9 can drive the rotating sleeve 4 to rotate, and since the outer side of the convex ring A9 is provided with anti-slip texture 23, it plays a role in preventing slippage.
[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A mechanical seal, comprising a stationary ring (1) and a rotating ring (2) located to the right of the stationary ring (1), wherein the stationary ring (1) and the rotating ring (2) are in contact connection, characterized in that: The moving ring (2) is provided with a clamping assembly, which includes a mounting sleeve (3), a rotating sleeve (4), a spring A (5), a guide sleeve (6) fixedly disposed on the right side of the moving ring (2), and a pressure ring (7) fixedly disposed on the left side of the rotating sleeve (4). The inner side of the mounting sleeve (3) and the outer side of the rotating sleeve (4) are both provided with threads. The rotating sleeve (4) is screwed into the mounting sleeve (3) and threadedly connected to the mounting sleeve (3). The left and right ends of the spring A (5) are fixedly connected to the moving ring (2) and the pressure ring (7) respectively. A guide groove (8) matching the guide sleeve (6) is opened on the left side wall of the mounting sleeve (3). The guide sleeve (6) is inserted into the guide groove (8) and slidably connected to the mounting sleeve (3).
2. The mechanical seal according to claim 1, characterized in that: The clamping assembly also includes a convex ring A (9) and a screw (10) fixedly disposed on the right side of the rotating sleeve (4). The diameter of the convex ring A (9) is larger than the diameter of the rotating sleeve (4). The convex ring A (9) has an arc-shaped groove (11) extending through the left and right sides. The mounting sleeve (3) has a screw hole (12) on its right side wall. The screw (10) is inserted into the arc-shaped groove (11) and screwed into the screw hole (12) to be fixedly connected to the convex ring A (9) and the mounting sleeve (3).
3. A mechanical seal according to claim 2, characterized in that: The clamping assembly also includes a spring B (13) sleeved on the screw (10) and a pressure pad (14) fixedly disposed on the left side of the spring B (13). The right end of the spring B (13) is fixedly connected to the screw head of the screw (10). After the screw (10) is inserted into the arc groove (11) and screwed into the screw hole (12), the pressure pad (14) is fixedly connected to the convex ring A (9).
4. A mechanical seal according to claim 1, characterized in that: The clamping assembly also includes a sealing ring A (15) and a sealing ring B (16). The inner wall of the moving ring (2) and the inner wall of the pressure ring (7) are respectively provided with sealing grooves A (17) and B (18). The sealing rings A (15) and B (16) are located inside the sealing grooves A (17) and B (18) and are in contact with the moving ring (2) and the pressure ring (7).
5. A mechanical seal according to claim 1, characterized in that: The stationary ring (1) is provided with a protective component, which includes a convex ring B (19) fixedly disposed on the outside of the stationary ring (1) and a protective sleeve (20). The protective sleeve (20) is provided with a plurality of filter holes (21). The outer side of the convex ring B (19) and the inner side of the protective sleeve (20) are both provided with threads. The protective sleeve (20) is screwed into the convex ring B (19) and threadedly connected to the convex ring B (19).
6. A mechanical seal according to claim 5, characterized in that: A protruding ring C (22) is fixedly provided on the outside of the moving ring (2), and the right end of the protective sleeve (20) is in contact with the protruding ring C (22).
7. A mechanical seal according to claim 2, characterized in that: The outer side of the convex ring A (9) is provided with anti-slip texture (23).