Mechanical sealing mechanism of centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and particularly discloses a centrifugal pump mechanical sealing mechanism which comprises a centrifugal pump body, an output shaft is installed at the output end of the centrifugal pump body, and a protective sleeve is connected to one side of the surface of the output shaft in a sleeved mode. Through the arrangement of the output shaft, the protective sleeve, the bearing ring, the first discharge hole, the oil outlet holes and the second discharge hole, during use, the surface of the cover plate injects lubricating oil into the storage pipe in the connecting frame through the injection pipe, and the first discharge hole conveys the lubricating oil to the inner wall of the bearing ring through the oil outlet holes in the two sides; a second discharge hole conveys lubricating oil into a connecting hole in the surface of the protective sleeve, so that the lubricating oil is conveyed to the inner walls of the output shaft and the protective sleeve, and therefore, when the output shaft and the protective sleeve rotate, the lubrication degree is increased, and abrasion caused by friction increase is prevented; therefore, the effect of conveniently sealing and lubricating the output shaft is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal pumps, and particularly relates to a mechanical seal mechanism for a centrifugal pump. Background Art

[0002] During the operation of a centrifugal pump, it is necessary to ensure the long-term stability of the sealing performance to reduce leakage and improve the safety and reliability of the equipment operation. The cartridge mechanical seal can achieve excellent sealing effects and reduce the leakage amount through precise design and processing, as well as optimized sealing structures.

[0003] In the Chinese patent with the publication number CN217129896U, a mechanical seal mechanism for an easily maintainable centrifugal pump is mentioned, including: a centrifugal pump; an output shaft is arranged on one side of the centrifugal pump, a sealing ring is arranged on one side of the outer surface of the output shaft, a pressing plate is arranged on one side of the outer surface of the sealing ring, and a mounting post is fixedly installed on the outer surface of the pressing plate; two setting grooves are respectively arranged on both sides of the inner cavity of the mounting post; a limiting device is arranged inside the setting groove, and the limiting device includes a fixed block. An embedded arc block is fixedly installed at the bottom of the fixed block, a pull rod is fixedly connected to the middle of the top of the fixed block, and a first spring is fixedly connected to the top of the fixed block. The utility model provides a mechanical seal mechanism for an easily maintainable centrifugal pump. By pulling the pull rod to drive the embedded arc block to disengage from the embedded groove, the sealing ring can be quickly detached from the surface of the output shaft. The device has a simple structure and strong practicability, and can quickly disassemble and install the sealing ring.

[0004] However, the above technical solution drives the embedded arc block to disengage from the embedded groove by pulling the pull rod, so as to quickly detach the sealing ring from the surface of the output shaft. Although this device can facilitate the quick disassembly of the sealing ring, it is difficult to achieve the sealing effect only through the sealing ring during the sealing process, and the friction between the sealing ring and the output shaft is relatively large, which easily causes wear between the output shaft and the sealing ring. Therefore, it needs to be improved by the staff. Content of the Utility Model

[0005] The purpose of the utility model is to provide a mechanical seal mechanism for a centrifugal pump to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A mechanical seal mechanism for a centrifugal pump, including:

[0008] A centrifugal pump main body;

[0009] An output shaft is installed at the output end of the centrifugal pump main body, and a protective sleeve is sleeved on one side of the surface of the output shaft;

[0010] Both sides of the surface of the protective sleeve are fixedly connected with bearing rings. A plurality of connecting holes are opened on one side of the surface of the protective sleeve. One side of the surface of the bearing ring is sleeved with a connecting frame. Installation grooves are opened on both sides of the inner wall of the connecting frame, and one side of the inner wall of the installation groove is sleeved on the surface of the bearing ring. A storage pipe is opened on one side of the inner wall of the connecting frame. A first discharge hole is opened on one side of the inner wall of the storage pipe. Two oil discharge holes are opened at the front end of the first discharge hole, and the front ends of the two oil discharge holes are respectively arranged on the inner walls of the two installation grooves. A second discharge hole is opened on the other side of the inner wall of the storage pipe, and the front end of the second discharge hole corresponds to the connecting hole.

[0011] Preferably, one side of the connecting frame is lapped with a cover plate. One side of the surface of the cover plate is fixedly connected with an injection pipe, and the front end of the injection pipe is lapped on the tail end of the storage pipe. A sealing cover is threadedly connected to the tail end of the injection pipe.

[0012] Preferably, first mounting plates are fixedly connected to the four peripheral parts of the surface of the connecting frame. One side of the back surface of the first mounting plate is lapped with a second mounting plate, and one side of the second mounting plate is fixedly connected to the surface of the cover plate.

[0013] Preferably, a fixing bolt is threadedly connected to one side of the surface of the second mounting plate, and one side of the surface of the fixing bolt is threadedly connected to the inner wall of the first mounting plate.

[0014] Preferably, a first sealing ring is fixedly connected to one side of the inner wall of the connecting frame, and one side of the surface of the first sealing ring is lapped on the inner wall of the cover plate. A connecting pipe is fixedly connected to one side of the back surface of the connecting frame, and a second sealing ring is fixedly connected to the front end of the connecting pipe.

[0015] Preferably, an installation disk is fixedly connected to the tail end of the connecting pipe. A plurality of installation bolts are threadedly connected to one side of the surface of the installation disk, and one side of the surface of the installation bolts is threadedly connected to the surface of the centrifugal pump main body.

[0016] Preferably, a sleeve pipe is fixedly connected to one side of the surface of the cover plate, and a third sealing ring is fixedly connected to the tail end of the sleeve pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) Through the settings of the output shaft, protective sleeve, bearing ring, connection frame, storage pipe, first discharge hole, oil outlet hole, second discharge hole and injection pipe, during use, the protective sleeve adheres to the surface of the output shaft to play a sealing role. The inner wall of the connection frame is provided with an installation groove to fix the bearing ring. The lubricating oil is injected into the storage pipe inside the connection frame through the injection pipe on the surface of the cover plate. The first discharge hole transports the lubricating oil to the inner wall of the bearing ring through the oil outlet holes on both sides, so that the bearing ring rotates synchronously with the protective sleeve when the protective sleeve rotates with the output shaft. The second discharge hole transports the lubricating oil into the connection holes on the surface of the protective sleeve, so that the lubricating oil is transported to the inner walls of the output shaft and the protective sleeve. Thus, while the output shaft and the protective sleeve are rotating, the lubrication degree is increased, preventing increased friction and wear, thereby achieving the effect of convenient sealing and lubrication of the output shaft, and being convenient for the staff to operate.

[0019] (2) Through the settings of the connection frame, cover plate, fixing bolts, first sealing ring, connecting pipe, second sealing ring, mounting plate, mounting bolts, sleeve pipe and third sealing ring, during use, a first mounting plate is provided on the surface of the connection frame to overlap with the second mounting plate on the surface of the cover plate, and the connection frame and the cover plate are fixedly attached through the fixing bolts. And a seal is maintained through the first sealing ring at the connection between the connection frame and the cover plate. A seal is maintained between the connecting pipe and the output shaft through the second sealing ring. And mounting bolts are threadedly connected to the end of the connecting pipe through the mounting plate, and the mounting bolts are inserted into the surface of the centrifugal pump main body. Thus, the sealing mechanism is fixed on the surface of the centrifugal pump main body. A seal is maintained between the sleeve pipe and the output shaft through the third sealing ring, thereby achieving the effect of convenient disassembly and assembly of the sealing mechanism, and being convenient for maintaining the sealing condition with the output shaft. Brief Description of the Drawings

[0020] Figure 1 is a three-dimensional view of the present utility model;

[0021] Figure 2 is a three-dimensional view of the connection frame of the present utility model;

[0022] Figure 3 is a three-dimensional view of the protective sleeve of the present utility model;

[0023] Figure 4 is a three-dimensional view of the storage pipe of the present utility model;

[0024] Figure 5 is a three-dimensional view of the third sealing ring of the present utility model;

[0025] In the figure: 1, the main body of the centrifugal pump; 2, the output shaft; 3, the protective sleeve; 4, the bearing ring; 5, the connecting hole; 6, the connecting frame; 7, the installation groove; 8, the storage pipe; 9, the first discharge hole; 10, the oil outlet hole; 11, the second discharge hole; 12, the cover plate; 13, the injection pipe; 14, the first mounting plate; 15, the second mounting plate; 16, the fixing bolt; 17, the first sealing ring; 18, the connecting pipe; 19, the second sealing ring; 20, the mounting disc; 21, the mounting bolt; 22, the sleeve pipe; 23, the third sealing ring. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1:

[0028] Please refer to Figures 1 to 5 As shown, a mechanical seal mechanism for a centrifugal pump includes:

[0029] The main body 1 of the centrifugal pump;

[0030] An output shaft 2 is installed at the output end of the main body 1 of the centrifugal pump. A protective sleeve 3 is sleeved on one side of the surface of the output shaft 2. The protective sleeve 3 adheres to the surface of the output shaft 2 to play a sealing role;

[0031] Both sides of the surface of the protective sleeve 3 are fixedly connected with bearing rings 4. A plurality of connecting holes 5 are formed on one side of the surface of the protective sleeve 3. One side of the surface of the bearing ring 4 is sleeved with a connecting frame 6. Installation grooves 7 are formed on both sides of the inner wall of the connecting frame 6, and one side of the inner wall of the installation groove 7 is sleeved on the surface of the bearing ring 4. The installation groove 7 on the inner wall of the connecting frame 6 is fixed to the bearing ring 4. A storage pipe 8 is formed on one side of the inner wall of the connecting frame 6. A first discharge hole 9 is formed on one side of the inner wall of the storage pipe 8. Two oil discharge holes 10 are formed at the front end of the first discharge hole 9, and the front ends of the two oil discharge holes 10 are respectively arranged on the inner walls of the two installation grooves 7. The first discharge hole 9 conveys the lubricating oil to the inner wall of the bearing ring 4 through the oil discharge holes 10 on both sides, so that the bearing ring 4 rotates synchronously when the protective sleeve 3 rotates with the output shaft 2. A second discharge hole 11 is formed on the other side of the inner wall of the storage pipe 8, and the front end of the second discharge hole 11 corresponds to the connecting hole 5. The second discharge hole 11 conveys the lubricating oil into the connecting hole 5 on the surface of the protective sleeve 3, so that the lubricating oil is conveyed to the inner walls of the output shaft 2 and the protective sleeve 3. Thus, when the output shaft 2 and the protective sleeve 3 rotate, the lubrication degree is increased, and the increase in friction and wear is prevented. One side of the connecting frame 6 is lapped with a cover plate 12. One side of the surface of the cover plate 12 is fixedly connected with an injection pipe 13, and the front end of the injection pipe 13 is lapped on the tail end of the storage pipe 8. The lubricating oil is injected into the storage pipe 8 inside the connecting frame 6 through the injection pipe 13 on the surface of the cover plate 12. The tail end of the injection pipe 13 is threadedly connected with a sealing cap.

[0032] Embodiment 2:

[0033] Please refer to Figures 1 to 5As shown in the figure, first mounting plates 14 are fixedly connected to the periphery of the surface of the connection frame 6. One side of the back surface of the first mounting plate 14 is lapped with a second mounting plate 15, and one side of the second mounting plate 15 is fixedly connected to the surface of the cover plate 12. One side of the surface of the second mounting plate 15 is threadedly connected with a fixing bolt 16, and one side of the surface of the fixing bolt 16 is threadedly connected to the inner wall of the first mounting plate 14. On the surface of the connection frame 6, the first mounting plate 14 on the surface of the connection frame 6 is lapped with the second mounting plate 15 on the surface of the cover plate 12, and the connection frame 6 and the cover plate 12 are fixedly fitted through the fixing bolt 16. One side of the inner wall of the connection frame 6 is fixedly connected with a first sealing ring 17, and one side of the surface of the first sealing ring 17 is lapped on the inner wall of the cover plate 12. At the connection between the connection frame 6 and the cover plate 12, sealing is maintained through the first sealing ring 17. One side of the back surface of the connection frame 6 is fixedly connected with an adapter pipe 18. The front end of the adapter pipe 18 is fixedly connected with a second sealing ring 19. Sealing is maintained between the adapter pipe 18 and the output shaft 2 through the second sealing ring 19. The tail end of the adapter pipe 18 is fixedly connected with a mounting disc 20. One side of the surface of the mounting disc 20 is threadedly connected with a plurality of mounting bolts 21, and one side of the surface of the mounting bolts 21 is threadedly connected to the surface of the centrifugal pump body 1. At the tail end of the adapter pipe 18, the mounting bolts 21 are threadedly connected through the mounting disc 20, and the mounting bolts 21 are inserted into the surface of the centrifugal pump body 1, thereby fixing the sealing mechanism on the surface of the centrifugal pump body 1. One side of the surface of the cover plate 12 is fixedly connected with a sleeve pipe 22. The tail end of the sleeve pipe 22 is fixedly connected with a third sealing ring 23. The third sealing ring 23 maintains sealing between the sleeve pipe 22 and the output shaft 2.

[0034] Embodiment 3:

[0035] Please refer to Figures 1 to 5 As shown in the figure, when sealing the output shaft 2 of the centrifugal pump, the output end is sleeved and sealed through the assembled mechanical sealing mechanism. The protective sleeve 3 is attached to the surface of the output shaft 2 to play a sealing role. The first discharge hole 9 conveys lubricating oil to the inner wall of the bearing ring 4 through the oil outlet holes 10 on both sides, so that the bearing ring 4 rotates synchronously with the protective sleeve 3 when the protective sleeve 3 rotates with the output shaft 2. The second discharge hole 11 conveys lubricating oil to the connection holes 5 on the surface of the protective sleeve 3, so that the lubricating oil is conveyed to the inner walls of the output shaft 2 and the protective sleeve 3. Thus, while the output shaft 2 and the protective sleeve 3 are rotating, the lubrication degree is increased, and the increase in friction and wear is prevented. At the connection between the connection frame 6 and the cover plate 12, sealing is maintained through the first sealing ring 17. Sealing is maintained between the adapter pipe 18 and the output shaft 2 through the second sealing ring 19. Sealing is maintained between the sleeve pipe 22 and the output shaft 2 through the third sealing ring 23. Thus, it is convenient to lubricate and seal between the assembled mechanical sealing mechanism and the output shaft 2, and the device can be disassembled in sections.

[0036] Working principle: When in use, the protective sleeve 3 is attached to the surface of the output shaft 2 to play a sealing role. An installation groove 7 is provided on the inner wall of the connection frame 6 and fixed to the bearing ring 4. The lubricating oil is injected into the storage pipe 8 inside the connection frame 6 through the injection pipe 13 on the surface of the cover plate 12. The first discharge hole 9 conveys the lubricating oil to the inner wall of the bearing ring 4 through the oil outlet holes 10 on both sides, so that the bearing ring 4 rotates synchronously with the protective sleeve 3 when the protective sleeve 3 rotates with the output shaft 2. The second discharge hole 11 conveys the lubricating oil into the connection hole 5 on the surface of the protective sleeve 3, so that the lubricating oil is conveyed to the inner walls of the output shaft 2 and the protective sleeve 3. Thus, while the output shaft 2 and the protective sleeve 3 are rotating, the lubrication degree is increased, and the increase in friction and wear are prevented. A first mounting plate 14 is provided on the surface of the connection frame 6 and overlaps with the second mounting plate 15 on the surface of the cover plate 12, and the connection frame 6 and the cover plate 12 are fixedly attached through the fixing bolts 16. And at the connection between the connection frame 6 and the cover plate 12, the seal is maintained through the first sealing ring 17. The seal is maintained between the connecting pipe 18 and the output shaft 2 through the second sealing ring 19. And at the tail end of the connecting pipe 18, the mounting bolt 21 is threadedly connected through the mounting disc 20, and the mounting bolt 21 is inserted into the surface of the centrifugal pump body 1. Thus, the sealing mechanism is fixed to the surface of the centrifugal pump body 1. The third sealing ring 23 maintains the seal between the sleeve pipe 22 and the output shaft 2.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal mechanism for a centrifugal pump, characterized in that, Including: Centrifugal pump main body (1); An output shaft (2) is installed at the output end of the centrifugal pump main body (1), and a protective sleeve (3) is sleeved on one side of the surface of the output shaft (2); Bearing rings (4) are fixedly connected to both sides of the surface of the protective sleeve (3). A plurality of connecting holes (5) are formed on one side of the surface of the protective sleeve (3). A connecting frame (6) is sleeved on one side of the surface of the bearing ring (4). Installation grooves (7) are formed on both sides of the inner wall of the connecting frame (6), and one side of the inner wall of the installation groove (7) is sleeved on the surface of the bearing ring (4). A storage pipe (8) is formed on one side of the inner wall of the connecting frame (6). A first discharge hole (9) is formed on one side of the inner wall of the storage pipe (8). Two oil discharge holes (10) are formed at the front end of the first discharge hole (9), and the front ends of the two oil discharge holes (10) are respectively arranged on the inner walls of the two installation grooves (7). A second discharge hole (11) is formed on the other side of the inner wall of the storage pipe (8), and the front end of the second discharge hole (11) corresponds to the connecting hole (5).

2. The mechanical seal mechanism of a centrifugal pump according to claim 1, characterized in that: A cover plate (12) is lapped on one side of the connecting frame (6). An injection pipe (13) is fixedly connected to one side of the surface of the cover plate (12), and the front end of the injection pipe (13) is lapped on the tail end of the storage pipe (8). A sealing cover is threadedly connected to the tail end of the injection pipe (13).

3. A centrifugal pump mechanical seal mechanism according to claim 1, characterized in that: First mounting plates (14) are fixedly connected to the four peripheral parts of the surface of the connecting frame (6). A second mounting plate (15) is lapped on the back side of the first mounting plate (14), and one side of the second mounting plate (15) is fixedly connected to the surface of the cover plate (12).

4. The mechanical seal mechanism of a centrifugal pump according to claim 3, characterized in that: A fixing bolt (16) is threadedly connected to one side of the surface of the second mounting plate (15), and one side of the surface of the fixing bolt (16) is threadedly connected to the inner wall of the first mounting plate (14).

5. A centrifugal pump mechanical seal mechanism according to claim 1, characterized in that: A first sealing ring (17) is fixedly connected to one side of the inner wall of the connecting frame (6), and one side of the surface of the first sealing ring (17) is lapped on the inner wall of the cover plate (12). An adapter pipe (18) is fixedly connected to the back side of the connecting frame (6), and a second sealing ring (19) is fixedly connected to the front end of the adapter pipe (18).

6. The mechanical seal mechanism of a centrifugal pump according to claim 5, characterized in that: An installation disc (20) is fixedly connected to the tail end of the adapter pipe (18). A plurality of installation bolts (21) are threadedly connected to one side of the surface of the installation disc (20), and one side of the surface of the installation bolts (21) is threadedly connected to the surface of the centrifugal pump main body (1).

7. A centrifugal pump mechanical seal mechanism according to claim 2, characterized in that: A sleeve pipe (22) is fixedly connected to one side of the surface of the cover plate (12), and a third sealing ring (23) is fixedly connected to the tail end of the sleeve pipe (22).

Images