A wear-resistant mechanical seal for pumps
By thickening the fitting surface of the static ring and the moving ring of the mechanical seal, and moderate pressure adjustment is achieved using structures such as threaded rods, the problem that existing mechanical seals cannot grasp friction during installation is solved, and the wear resistance and installation convenience are improved.
Patent Information
- Application Number
- CN202510078893.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-04-04
AI Technical Summary
During the installation process, existing mechanical seals cannot grasp the friction between the static ring and the moving ring, resulting in sharp wear, burning or seal failure at the friction, and improper adjustment will lead to water leakage, increasing the difficulty of maintenance.
A mechanical seal for anti-wear pump is designed. By thickening the fitting surface between the static ring and the moving ring, and the combination of the threaded rod, the transmission worm gear and the limit seat during the installation process, the stable fit between the static ring and the moving ring and the moving ring and the moderate pressure adjustment are achieved.
It improves the wear resistance of the mechanical seal, ensures controllable friction between the static ring and the moving ring, avoids water leakage and burning problems, and reduces the difficulty of subsequent maintenance.
Smart Images
Figure CN119755128A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of mechanical seals, and in particular to a mechanical seal for an anti-wear pump. Background Art
[0002] A mechanical seal is a device that prevents fluid leakage by at least one pair of end faces perpendicular to the axis of rotation, which are kept in contact and slide relative to each other under the action of fluid pressure and the elastic force or magnetic force of a compensation mechanism and the cooperation of an auxiliary seal.
[0003] During the installation of current mechanical seals, workers are unable to grasp the friction between the static ring and the dynamic ring. When the spring compression of the dynamic ring is adjusted too large, it may cause rapid wear at the friction point, and even burn out in severe cases. In addition, excessive compression causes the spring to lose the ability to adjust the end face of the dynamic ring, resulting in seal failure. When the spring compression of the dynamic ring is adjusted too small, it may easily cause the friction between the static ring and the dynamic ring to be too small, resulting in water leakage. The pump body needs to be reopened for inspection, which is very troublesome.
[0004] Therefore, it is necessary to provide a new wear-resistant pump mechanical seal to solve the above-mentioned technical problems. Summary of the invention
[0005] In order to solve the above technical problems, the present invention provides an anti-wear pump mechanical seal, which solves the problem that during the installation of the current mechanical seal, the workers are unable to grasp the friction between the static ring and the dynamic ring.
[0006] The wear-resistant pump mechanical seal provided by the present invention comprises a base, a motor is fixed on the base, a connecting seat is fixed on the motor, and the output shaft of the motor passes through the connecting seat, and a mounting groove is opened at the center of the connecting seat; Two inner pressure plates are symmetrically arranged inside the mounting groove, and a plurality of sliding columns are arranged through the connecting seat, one end of the sliding column is fixedly connected to the inner pressure plate, and the other end of the sliding column is fixed to the outer pressure plate; A dynamic ring and a static ring are installed on the output shaft. The static ring is located between the dynamic ring and the inner pressure plate, and the surface of the static ring is thickened.
[0007] In a preferred embodiment, a key groove for fixing the movable ring is provided on the surface of the output shaft.
[0008] In a preferred embodiment, an impeller is disposed on one side of the connecting seat, and the connecting seat and the impeller are connected via a flange.
[0009] In a preferred embodiment, a pressure seat is disposed on one side of each of the two outer pressure plates, and a guide rail and a threaded rod are disposed at intervals on one side of the pressure seat; One end of the guide rail is fixed on the connecting seat, the other end of the guide rail passes through the pressing seat, and the guide rail is slidably connected to the pressing seat; One end of the threaded rod is movably connected to the connecting seat, the other end of the threaded rod passes through the pressure seat, and the threaded rod is threadedly connected to the pressure seat.
[0010] In a preferred embodiment, a transmission worm gear is installed on each of the two threaded rods, a limit seat is installed on one side of the connecting seat, a rotating shaft is movably provided on the limit seat through a bearing, worms are connected to both ends of the rotating shaft, and the two worms are respectively meshed with the two transmission worm gears.
[0011] In a preferred embodiment, one of the worms is connected to a force transmission shaft, and a hexagonal block is installed on the force transmission shaft.
[0012] In a preferred embodiment, a closed transmission is adopted between the worm and the transmission worm wheel, and the surface of the threaded rod is galvanized.
[0013] In a preferred embodiment, two slide rails are fixed at intervals on the base, two support legs are fixed in an eight-shaped manner on the bottom of the impeller, and a slide seat is fixed on both of the support legs, and the slide seat is slidably connected to the slide rails; The support legs are fixedly connected to the base via high-strength bolts.
[0014] In a preferred embodiment, an arc seat is fixed on the slide seat, a screw rod is provided through the arc seat, a friction plate is fixed at the bottom of the screw rod, and a handle is installed at the top of the screw rod; The screw rod is threadedly connected to the arc-shaped seat.
[0015] In a preferred embodiment, a water measuring groove is provided on the base, the water measuring groove is located directly below the connecting seat, and a water immersion alarm is installed inside the water measuring groove.
[0016] Beneficial effects of the present invention: 1. During installation, the staff removes the impeller, applies butter to the stationary ring and puts it into the installation groove, then puts the dynamic ring between the stationary ring and the keyway, and finally installs the impeller. After installation, use a wrench to rotate the hexagonal block. Under the action of the two worms and the two transmission worm wheels, the two threaded rods rotate to drive the pressure seat to move downward along the guide rail. When the pressure seat moves downward, it will drive the outer pressure plate to move. Under the force transmission of the sliding column, the inner pressure plate can move with it to apply pressure to the stationary ring. At the same time, with the cooperation of the limit key, the dynamic ring and the stationary ring can be stably fitted together, and the installation work can be easily completed. By observing the moving distance of the pressure seat on the guide rail, it is convenient for the staff to grasp the extrusion force between the stationary ring and the dynamic ring, so as to judge the friction between the stationary ring and the dynamic ring; 2. Since the fitting surface of the static ring and the dynamic ring has been thickened, the wear resistance of the mechanical seal can be greatly improved. When the water immersion alarm detects that there is water inside the water tank, it can be proved that the fitting surface between the static ring and the dynamic ring is loose. At this time, the worker only needs to rotate the hexagonal block outside to increase the pressure between the fitting surface of the dynamic ring and the static ring. There is no need to reopen the pump body for maintenance, which reduces the difficulty of subsequent maintenance; 3. When the stationary ring of this mechanical seal needs to be replaced, the staff can first remove the impeller, then move the slide at the bottom of the impeller along the slide rail to the side of the motor, and finally turn the handle to drive the screw to rotate. When the screw rotates, it will drive the friction plate at its bottom to move downward until it contacts the surface of the slide rail. The impeller can be fixed on the slide rail through the friction between it and the slide rail, which is convenient for its subsequent installation work. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A three-dimensional view of the main structure of the wear-resistant pump mechanical seal provided by the present invention; Figure 2 A cross-sectional view of the main structure of the wear-resistant pump mechanical seal provided by the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged structure of shown; Figure 4 The stereoscopic view of the connection seat provided by the present invention Figure 1 ; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of B shown; Figure 6 The stereoscopic view of the connection seat provided by the present invention Figure 2 .
[0018] Numbers in the figure: 1. Base; 2. Motor; 3. Connecting seat; 4. Output shaft; 5. Mounting groove; 6. Inner pressure plate; 7. Sliding column; 8. Outer pressure plate; 9. Moving ring; 10. Static ring; 11. Keyway; 12. Impeller; 13. Flange; 14. Pressure seat; 15. Guide rail; 16. Threaded rod; 17. Drive worm gear; 18. Limit seat; 19. Rotating shaft; 20. Worm; 21. Power transmission shaft; 22. Hexagonal block; 23. Slide rail; 24. Support leg; 25. Sliding seat; 26. Arc seat; 27. Screw; 28. Friction plate; 29. Handle; 30. Water measuring trough; 31. Water immersion alarm. DETAILED DESCRIPTION
[0019] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.
[0020] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 ,in Figure 1 A three-dimensional view of the main structure of the wear-resistant pump mechanical seal provided by the present invention; Figure 2 A cross-sectional view of the main structure of the wear-resistant pump mechanical seal provided by the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged structure of shown; Figure 4 The stereoscopic view of the connection seat provided by the present invention Figure 1 ; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of B shown; Figure 6 The stereoscopic view of the connection seat provided by the present invention Figure 2 .
[0021] In the specific implementation process, Figure 1-Figure 6As shown, it includes a base 1, a motor 2 is fixed on the base 1, a connecting seat 3 is fixed on the motor 2, and the output shaft 4 of the motor 2 passes through the connecting seat 3, a mounting groove 5 is opened at the center of the connecting seat 3, two inner pressure plates 6 are symmetrically arranged inside the mounting groove 5, a plurality of sliding columns 7 are arranged through the connecting seat 3, one end of the sliding column 7 is fixedly connected to the inner pressure plate 6, and the other end of the sliding column 7 is fixed to the outer pressure plate 8, a dynamic ring 9 and a static ring 10 are installed on the output shaft 4, the static ring 10 is located between the dynamic ring 9 and the inner pressure plate 6, and the surface of the static ring 10 is thickened. The fitting surface between the static ring 10 and the dynamic ring 9 has been thickened, so the wear resistance of the mechanical seal can be greatly improved. A keyway 11 for fixing the dynamic ring 9 is provided on the surface of the output shaft 4. Since the fitting surface between the static ring 10 and the dynamic ring 9 has been thickened, the wear resistance of the mechanical seal can be greatly improved. When the water immersion alarm 31 detects that there is water inside the water measuring tank 30, it can be proved that the fitting surface between the static ring 10 and the dynamic ring 9 is loose. At this time, the worker only needs to rotate the hexagonal block 22 externally to increase the pressure between the fitting surfaces of the dynamic ring 9 and the static ring 10.
[0022] An impeller 12 is arranged on one side of the connecting seat 3, and the connecting seat 3 and the impeller 12 are connected by a flange 13. Two slide rails 23 are fixed on the base 1 at intervals, and two supporting legs 24 are fixed in an eight-shaped manner at the bottom of the impeller 12. A slide seat 25 is fixed on the two supporting legs 24, and the slide seat 25 is slidably connected to the slide rail 23. The supporting legs 24 and the base 1 are fixedly connected by high-strength bolts. A water measuring trough 30 is opened on the base 1, and the water measuring trough 30 is located directly below the connecting seat 3. A water immersion alarm 31 is installed inside the water measuring trough 30. The water immersion alarm 31 is a security device for detecting water immersion and issuing an alarm in time. Its working principle is mainly based on the conductive property of liquid, and the water immersion detection and alarm functions are realized by sensing the change in resistance value between the detector and the main circuit.
[0023] An arc seat 26 is fixed on the slide 25, and a screw 27 is provided through the arc seat 26. A friction plate 28 is fixed at the bottom of the screw 27, and a handle 29 is installed on the top of the screw 27. The screw 27 and the arc seat 26 are threadedly connected. When the static ring 10 of the mechanical seal needs to be replaced, the staff can first remove the impeller 12, and then move the slide 25 at the bottom of the impeller 12 along the slide rail 23 to the side of the motor 2, and finally turn the handle 29 to drive the screw 27 to rotate. When the screw 27 rotates, it will drive the friction plate 28 at its bottom to move downward until it contacts the surface of the slide rail 23. The impeller 12 can be fixed on the slide rail 23 through the friction between it and the slide rail 23, which is convenient for its subsequent installation work.
[0024] A pressure seat 14 is provided on one side of the two outer pressure plates 8, and a guide rail 15 and a threaded rod 16 are arranged at intervals on one side of the pressure seat 14. One end of the guide rail 15 is fixed on the connecting seat 3, and the other end of the guide rail 15 passes through the pressure seat 14, and the guide rail 15 is slidably connected to the pressure seat 14. One end of the threaded rod 16 is movably connected to the connecting seat 3, and the other end of the threaded rod 16 passes through the pressure seat 14, and the threaded rod 16 is threadedly connected to the pressure seat 14. A transmission worm gear 17 is installed on the two threaded rods 16, and a limit seat 18 is installed on one side of the connecting seat 3. A rotating shaft 19 is movably provided on the limit seat 18 through a bearing. Worms 20 are connected to both ends of the rotating shaft 19. The two worms 20 are respectively meshed with the two transmission worm wheels 17, and one of the worms 20 is connected to a force transmission shaft 21. A hexagonal block 22 is installed on the force transmission shaft 21. After removing the impeller 12, the static ring 10 is smeared with butter and placed in the installation groove 5, and then the dynamic ring 9 is placed between the static ring 10 and the keyway 11. Finally, the impeller 12 is installed. After the installation is completed, use a wrench to rotate the hexagonal block 22. Under the action of the two worms 20 and the two transmission worm wheels 17, the two threaded rods 16 are rotated to drive the pressure seat 14 to move downward along the guide rail 15. When the pressure seat 14 moves downward, it will drive the outer pressure plate 8 to move. Under the force transmission of the sliding column 7, the inner pressure plate 6 can move with it to apply pressure to the static ring 10. At the same time, with the cooperation of the limit key, the dynamic ring 9 and the static ring 10 can be stably fitted together, and the installation work can be easily completed.
[0025] A closed transmission is adopted between the worm 20 and the transmission worm wheel 17, and the surface of the threaded rod 16 is galvanized to reduce its wear and tear and increase its service life.
[0026] Working principle of the present invention: When the stationary ring 10 of the mechanical seal needs to be replaced, the staff can first remove the impeller 12, then move the slide seat 25 at the bottom of the impeller 12 along the slide rail 23 to the side of the motor 2, and finally turn the handle 29 to drive the screw 27 to rotate. When the screw 27 rotates, it will drive the friction plate 28 at its bottom to move downward until it contacts the surface of the slide rail 23. The impeller 12 can be fixed on the slide rail 23 through the friction between it and the slide rail 23, which is convenient for its subsequent installation work; After removing the impeller 12, apply butter to the stationary ring 10 and put it into the installation groove 5, then put the dynamic ring 9 between the stationary ring 10 and the keyway 11, and finally install the impeller 12. After installation, use a wrench to rotate the hexagonal block 22. Under the action of the two worms 20 and the two driving worm wheels 17, the two threaded rods 16 rotate to drive the pressure seat 14 to move downward along the guide rail 15. When the pressure seat 14 moves downward, it will drive the outer pressure plate 8 to move. Under the force transmission of the sliding column 7, the inner pressure plate 6 can move accordingly to apply pressure to the static ring 10. At the same time, under the cooperation of the limit key, the dynamic ring 9 and the static ring 10 can be stably fitted together, and the installation work can be easily completed. Since the fitting surfaces of the static ring 10 and the dynamic ring 9 have been thickened, the wear resistance of the mechanical seal can be greatly improved. When the water immersion alarm 31 detects that there is water inside the water measuring tank 30, it can be proved that the fitting surface between the static ring 10 and the dynamic ring 9 is loose. At this time, the worker only needs to rotate the hexagonal block 22 externally to increase the pressure between the fitting surfaces of the dynamic ring 9 and the static ring 10.
[0027] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.
[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A wear-resistant pump mechanical seal, comprising a base (1), a motor (2) being fixed on the base (1), a connecting seat (3) being fixed on the motor (2), and an output shaft (4) of the motor (2) passing through the connecting seat (3), characterized in that: The connection seat (3) has a mounting groove (5) at the center thereof; Two inner pressure plates (6) are symmetrically arranged inside the mounting groove (5), a plurality of slide columns (7) are arranged through the connecting seat (3), one end of the slide column (7) is fixedly connected to the inner pressure plate (6), and the other end of the slide column (7) is fixed to an outer pressure plate (8); A dynamic ring (9) and a static ring (10) are mounted on the output shaft (4); the static ring (10) is located between the dynamic ring (9) and the inner pressure plate (6); and the surface of the static ring (10) is thickened.
2. The wear-resistant pump mechanical seal according to claim 1, characterized in that: A keyway (11) for fixing the moving ring (9) is provided on the surface of the output shaft (4).
3. The wear-resistant pump mechanical seal according to claim 2, characterized in that: An impeller (12) is provided on one side of the connection seat (3), and the connection seat (3) and the impeller (12) are connected via a flange (13).
4. The wear-resistant pump mechanical seal according to claim 3, characterized in that: A pressure seat (14) is provided on one side of each of the two outer pressure plates (8), and a guide rail (15) and a threaded rod (16) are provided at intervals on one side of the pressure seat (14); One end of the guide rail (15) is fixed on the connecting seat (3), the other end of the guide rail (15) passes through the pressing seat (14), and the guide rail (15) is slidably connected to the pressing seat (14); One end of the threaded rod (16) is movably connected to the connecting seat (3), the other end of the threaded rod (16) passes through the pressure seat (14), and the threaded rod (16) is threadedly connected to the pressure seat (14).
5. The wear-resistant pump mechanical seal according to claim 4, characterized in that: A transmission worm gear (17) is mounted on each of the two threaded rods (16); a limit seat (18) is mounted on one side of the connection seat (3); a rotating shaft (19) is movably arranged on the limit seat (18) via a bearing; both ends of the rotating shaft (19) are connected to a worm (20); and the two worms (20) are respectively meshed with the two transmission worm gears (17).
6. The wear-resistant pump mechanical seal according to claim 5, characterized in that: A force transmission shaft (21) is connected to one of the worm gears (20), and a hexagonal block (22) is mounted on the force transmission shaft (21).
7. The wear-resistant pump mechanical seal according to claim 6, characterized in that: A closed transmission is adopted between the worm (20) and the transmission worm wheel (17), and the surface of the threaded rod (16) is galvanized.
8. The wear-resistant pump mechanical seal according to claim 7, characterized in that: Two slide rails (23) are fixed at intervals on the base (1); two support legs (24) are fixed in an eight-shaped pattern on the bottom of the impeller (12); a slide seat (25) is fixed on each of the two support legs (24); and the slide seat (25) is slidably connected to the slide rails (23); The support legs (24) are fixedly connected to the base (1) via high-strength bolts.
9. The wear-resistant pump mechanical seal according to claim 8, characterized in that: An arc-shaped seat (26) is fixed on the sliding seat (25), a screw rod (27) is provided through the arc-shaped seat (26), a friction plate (28) is fixed at the bottom of the screw rod (27), and a handle (29) is installed at the top of the screw rod (27); The screw rod (27) is threadedly connected to the arc-shaped seat (26).
10. The wear-resistant pump mechanical seal according to claim 9, characterized in that: The base (1) is provided with a water measuring groove (30), the water measuring groove (30) is located directly below the connecting seat (3), and a water immersion alarm (31) is installed inside the water measuring groove (30).