Mechanical seal combined structure for leakproof reinforced pump

Abstract

The utility model discloses a mechanical seal combination structure for a leakproof reinforced pump, which comprises a moving ring and a static ring, the moving ring is sleeved on a rotating shaft, the rotating shaft is fixedly connected with a spring seat, the spring seat is fixedly connected with a first spring, one end of the first spring far away from the spring seat is fixedly connected with a partition plate, and the moving ring is fixedly connected on the partition plate; the static ring is installed on the first end cover, the movable ring abuts against the static ring, and the first end cover is fixedly connected to the shell. The sealing reinforcing assembly comprises a second end cover, the second end cover is fixedly connected to the first end cover, a buffer cavity is formed between the second end cover and the first end cover, a drain hole is formed in the second end cover and communicated with the buffer cavity, a sealing cover is installed on the drain hole, the rotating shaft is sleeved with an annular sealing plate, and a first sealing ring is arranged between the second end cover and the rotating shaft. The pump body is further sealed through the buffer cavity and the annular sealing plate, the sealing stability is improved, and the pump is safer in actual use.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal structure technology, and in particular to a leak-proof reinforced mechanical seal combination structure for pumps. Background Technology

[0002] In industries such as petrochemicals, pharmaceuticals, and energy, pumps are core devices for fluid transport, and their operational stability and sealing performance directly affect production safety and environmental benefits. Mechanical seals, as key components of pumps, achieve axial sealing through the contact of the end faces of the rotating and stationary rings, playing a crucial role in preventing media leakage and resisting external contamination.

[0003] Conventional mechanical seals mostly adopt a single-end-face friction pair structure. However, under high speed or variable operating conditions, the dynamic ring has poor following performance. The dynamic ring and stationary ring are prone to instantaneous separation of their end faces due to axial movement or vibration, which can lead to sudden leakage.

[0004] To address this issue, a leak-proof reinforced mechanical seal assembly structure for pumps is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof reinforced mechanical seal assembly structure for pumps to solve the problems existing in the prior art, and to cope with sudden changes in operating conditions and prevent sudden leakage.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a leak-proof reinforced mechanical seal assembly structure for pumps, comprising:

[0007] A rotating ring and a stationary ring are provided. The rotating ring is sleeved on a rotating shaft. A spring seat is fixedly connected to the rotating shaft. A first spring is fixedly connected to the spring seat. A partition plate is fixedly connected to the end of the first spring away from the spring seat. The rotating ring is fixedly connected to the partition plate. The stationary ring is mounted on a first end cover. The rotating ring and the stationary ring abut against each other. The first end cover is fixedly connected to the housing. A first shaft hole is provided on the first end cover. The rotating shaft passes through the shaft hole.

[0008] A sealing reinforcement assembly includes a second end cap with a second shaft hole. The rotating shaft passes through the second shaft hole. The second end cap is fixedly connected to a first end cap. A buffer cavity is formed between the second end cap and the first end cap. A drain hole is provided on the second end cap and communicates with the buffer cavity. A sealing cap is installed on the drain hole. An annular sealing plate is sleeved on the rotating shaft and located inside the buffer cavity. A sealing ring is provided between the second end cap and the rotating shaft.

[0009] Preferably, a first annular plate is fixedly connected inside the second end cap, and a third shaft hole is provided on the first annular plate. The sidewall of the third shaft hole is inclined, and a conical sealing ring is sleeved on the rotating shaft. The conical sealing ring is located inside the third shaft hole.

[0010] Preferably, an annular top plate is fixedly connected to the annular sealing plate, and a second annular plate is fixedly connected to the annular top plate, the second annular plate abutting against the conical sealing ring.

[0011] Preferably, a second spring is provided between the second annular plate and the first annular plate.

[0012] Preferably, a plurality of sealing rings two and a plurality of sealing rings three are installed on the annular sealing plate, the sealing rings two being located between the annular sealing plate and the rotating shaft, and the sealing rings three being located between the second end cap and the annular sealing plate.

[0013] Preferably, a sealing ring is installed between the second end cap and the first end cap.

[0014] Preferably, a sealing ring five is installed between the stationary ring and the first end cap, and a sealing ring six is ​​installed between the first end cap and the housing.

[0015] This utility model discloses the following technical effects: In this device, the spring seat is used to install the first spring, which in turn presses against the partition plate, thereby ensuring a tight fit between the rotating ring and the stationary ring. The buffer cavity inside the second end cover buffers the liquid flowing out of the housing. If there is leakage at the rotating ring and the stationary ring, the leaked liquid will flow into the buffer cavity. The drain hole is used to drain the liquid from the buffer cavity. During maintenance, the sealing cover can be opened, and the annular sealing plate acts as a seal to prevent further liquid leakage. The sealing ring is used to seal the rotating shaft and the second end cover, further preventing liquid leakage. This utility model achieves further sealing of the pump body through the buffer cavity and the annular sealing plate, improving the stability of the seal and making it safer in actual use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the anti-leakage reinforced mechanical seal assembly structure for pumps according to this utility model;

[0018] Figure 2 for Figure 1Enlarged view of point a in the middle;

[0019] Figure 3 for Figure 1 Enlarged view of point b in the middle;

[0020] The components are as follows: 1. Moving ring; 2. Stationary ring; 3. Rotating shaft; 4. Spring seat; 5. First spring; 6. First end cover; 7. Housing; 8. Second end cover; 9. Buffer chamber; 10. Drain hole; 11. Sealing cover; 12. Annular sealing plate; 13. Sealing ring one; 14. First annular plate; 15. Conical sealing ring; 16. Annular top plate; 17. Second annular plate; 18. Sealing ring two; 19. Sealing ring three; 20. Sealing ring four; 21. Sealing ring five; 22. Second spring; 23. Partition plate; 24. Sealing ring six. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1-3 This utility model provides a leak-proof reinforced mechanical seal assembly structure for pumps, comprising:

[0024] A rotating ring 1 and a stationary ring 2 are provided. The rotating ring 1 is sleeved on the rotating shaft 3. A spring seat 4 is fixedly connected to the rotating shaft 3. A first spring 5 is fixedly connected to the spring seat 4. A partition 23 is fixedly connected to the end of the first spring 5 away from the spring seat 4. The rotating ring 1 is fixedly connected to the partition 23. The stationary ring 2 is installed on the first end cover 6. The rotating ring 1 and the stationary ring 2 abut against each other. The first end cover 6 is fixedly connected to the housing 7. A first shaft hole is opened on the first end cover 6. The rotating shaft 3 passes through the shaft hole.

[0025] The sealing reinforcement assembly includes a second end cover 8, which has a second shaft hole. The rotating shaft 3 passes through the second shaft hole. The second end cover 8 is fixedly connected to the first end cover 6. A buffer cavity 9 is formed between the second end cover 8 and the first end cover 6. The second end cover 8 has a drain hole 10, which communicates with the buffer cavity 9. A sealing cover 11 is installed on the drain hole 10. An annular sealing plate 12 is sleeved on the rotating shaft 3 and is located in the buffer cavity 9. A sealing ring 13 is provided between the second end cover 8 and the rotating shaft 3.

[0026] In this device, the spring seat 4 is used to install the first spring 5, which in turn presses against the partition 23, thereby ensuring a tight fit between the rotating ring 1 and the stationary ring 2. The buffer chamber 9 inside the second end cover 8 buffers the liquid flowing out of the housing 7. If there is a leak at the rotating ring 1 or the stationary ring 2, the leaked liquid will flow into the buffer chamber 9. The drain hole 10 drains the liquid from the buffer chamber 9. During maintenance, the sealing cover 11 can be opened, and the annular sealing plate 12 acts as a seal to prevent further liquid leakage. The sealing ring 13 seals the rotating shaft 3 and the second end cover 8, further preventing liquid leakage. The spring seat 4 is fixedly connected to the rotating shaft 3 with screws. The first end cover 6 and the housing 7 are connected with screws, and the second end cover 8 and the first end cover 6 are connected with screws.

[0027] In a further optimized design, a first annular plate 14 is fixedly connected inside the second end cap 8. A third shaft hole is provided on the first annular plate 14. The side wall of the third shaft hole is inclined. A conical sealing ring 15 is fitted on the rotating shaft 3. The conical sealing ring 15 is located inside the third shaft hole.

[0028] The conical sealing ring 15 and the first annular plate 14 are tightly fitted together to form a sealing layer. The conical sealing ring 15 serves as a compensation side and cooperates with the first annular plate 14.

[0029] In a further optimized design, an annular top plate 16 is fixedly connected to the annular sealing plate 12, and a second annular plate 17 is fixedly connected to the annular top plate 16. The second annular plate 17 abuts against the conical sealing ring 15.

[0030] When liquid leaks into the buffer chamber 9, the liquid will enter the buffer chamber 9 and push the annular sealing plate 12. The annular sealing plate 12, the top plate 16, and the second annular plate 17 will squeeze the conical sealing ring 15, making the conical sealing ring 15 and the second annular plate 17 more tightly connected, thereby preventing further leakage.

[0031] In a further optimized design, a second spring 22 is provided between the second annular plate 17 and the first annular plate 14.

[0032] The second spring 22 is used to hold the second annular plate 17, the annular sealing plate 12 and the top plate 16. When the moving ring 1 and the stationary ring 2 do not leak, the conical sealing ring 15 and the second annular plate 17 do not need to be tightly fitted. When there is liquid in the buffer cavity 9, it will push the annular sealing plate 12, which will then cause the second annular plate 17 to squeeze the second spring 22, thereby pushing the conical sealing ring 15.

[0033] In a further optimized design, several sealing rings 18 and several sealing rings 19 are installed on the annular sealing plate 12. The sealing rings 18 are located between the annular sealing plate 12 and the rotating shaft 3, and the sealing rings 19 are located between the second end cover 8 and the annular sealing plate 12.

[0034] Sealing ring 2 18 improves the sealing performance between the annular sealing plate 12 and the rotating shaft 3, and sealing ring 3 19 improves the sealing performance between the second end cover 8 and the annular sealing plate 12.

[0035] The design was further optimized by installing a sealing ring 20 between the second end cap 8 and the first end cap 6.

[0036] The sealing ring 420 improves the sealing between the second end cap 8 and the first end cap 6.

[0037] The design is further optimized by installing a sealing ring 21 between the stationary ring 2 and the first end cover 6, and a sealing ring 24 between the first end cover 6 and the housing 7.

[0038] Sealing ring 5 21 improves the sealing between stationary ring 2 and first end cover 6, and sealing ring 6 24 improves the sealing between first end cover 6 and housing 7.

[0039] The working principle of this device is as follows: under normal circumstances, a main seal is formed between the rotating ring 1 and the stationary ring 2. When there is leakage at the rotating ring 1 and the stationary ring 2, the leaked liquid will flow into the buffer chamber 9. The liquid will push the annular sealing plate 12. The annular sealing plate 12, the top plate 16, and the second annular plate 17 will squeeze the second spring 22 and the conical sealing ring 15. The second spring 22 is compressed, and at the same time, the conical sealing ring 15 and the first annular plate 14 are tightly fitted to form a sealing layer. The sealing ring 13 can further prevent liquid leakage.

[0040] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A leak-proof reinforced mechanical seal assembly structure for pumps, characterized in that, include: A rotating ring (1) and a stationary ring (2) are provided. The rotating ring (1) is sleeved on a rotating shaft (3). A spring seat (4) is fixedly connected to the rotating shaft (3). A first spring (5) is fixedly connected to the spring seat (4). A partition plate (23) is fixedly connected to the end of the first spring (5) away from the spring seat (4). The rotating ring (1) is fixedly connected to the partition plate (23). The stationary ring (2) is installed on a first end cover (6). The rotating ring (1) and the stationary ring (2) abut against each other. The first end cover (6) is fixedly connected to a housing (7). A first shaft hole is provided on the first end cover (6). The rotating shaft (3) passes through the shaft hole. A sealing reinforcement assembly includes a second end cap (8), on which a second shaft hole is provided. The rotating shaft (3) passes through the second shaft hole. The second end cap (8) is fixedly connected to the first end cap (6). A buffer cavity (9) is formed between the second end cap (8) and the first end cap (6). A drain hole (10) is provided on the second end cap (8). The drain hole (10) communicates with the buffer cavity (9). A sealing cap (11) is installed on the drain hole (10). An annular sealing plate (12) is sleeved on the rotating shaft (3). The annular sealing plate (12) is located in the buffer cavity (9). A sealing ring (13) is provided between the second end cap (8) and the rotating shaft (3).

2. The anti-leakage reinforced mechanical seal assembly structure for pumps according to claim 1, characterized in that: The second end cap (8) is fixedly connected to a first annular plate (14), and a third shaft hole is provided on the first annular plate (14). The side wall of the third shaft hole is inclined. A conical sealing ring (15) is sleeved on the rotating shaft (3), and the conical sealing ring (15) is located in the third shaft hole.

3. The anti-leakage reinforced mechanical seal assembly structure for pumps according to claim 2, characterized in that: An annular top plate (16) is fixedly connected to the annular sealing plate (12), and a second annular plate (17) is fixedly connected to the annular top plate (16). The second annular plate (17) abuts against the conical sealing ring (15).

4. The anti-leakage reinforced mechanical seal assembly structure for pumps according to claim 3, characterized in that: A second spring (22) is provided between the second annular plate (17) and the first annular plate (14).

5. The anti-leakage reinforced mechanical seal assembly structure for pumps according to claim 1, characterized in that: A plurality of sealing rings 2 (18) and a plurality of sealing rings 3 (19) are installed on the annular sealing plate (12). The sealing rings 2 (18) are located between the annular sealing plate (12) and the rotating shaft (3), and the sealing rings 3 (19) are located between the second end cap (8) and the annular sealing plate (12).

6. The anti-leakage reinforced mechanical seal assembly structure for pumps according to claim 1, characterized in that: A sealing ring four (20) is installed between the second end cap (8) and the first end cap (6).

7. The anti-leakage reinforced mechanical seal assembly structure for pumps according to claim 1, characterized in that: A sealing ring five (21) is installed between the stationary ring (2) and the first end cap (6), and a sealing ring six (24) is installed between the first end cap (6) and the housing (7).

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