Mechanical seal device for high temperature coal slurry pump

Abstract

The utility model discloses a mechanical sealing device for high temperature coal slurry pump, including the shaft body, the outer wall on the upper end of shaft body fixed mounting has the upper locating ring, the outer wall on the upper locating ring is installed with a plurality of locating pins, and one end of locating pin penetrates the upper locating ring and is fixedly connected with the outer wall of shaft body, and the outer wall of shaft body below the upper locating ring is sleeved with mechanical seal seat, and the bottom of mechanical seal seat outside the shaft body is fixed with the upper connecting ring, and the outer wall of shaft body below the upper connecting ring is sleeved with the fixed ring, and the bottom of fixed ring is fixed with the mounting ring, and the inside of mounting ring is equipped with a plurality of screw rods, and the inside of mounting ring between adjacent screw rods all is equipped with ring hole, and the top of screw rod penetrates the upper connecting ring and is fixedly installed with the lock nut of screw thread. The utility model not only has reached the purpose of easy and convenient installation connection of mechanical sealing device, but also has guaranteed the stability after mechanical sealing device installation connection, and has ensured the sealing property when mechanical sealing device uses.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically a mechanical seal device for a high-temperature coal slurry pump. Background Technology

[0002] High-temperature coal slurry pumps are key equipment in coal liquefaction and coal chemical processes, used to transport high-temperature, high-pressure coal slurry media containing solid particles. Mechanical seals, as the core component of high-temperature coal slurry pumps, directly affect the normal operation and service life of the pump. Currently, traditional mechanical seal devices for high-temperature coal slurry pumps have some shortcomings. Due to the high temperature and solid particle content of the coal slurry, solid particles easily enter the sealing end face during operation, causing wear and leading to seal failure and coal slurry leakage. This not only wastes resources but may also pollute the environment. Therefore, developing a mechanical seal device for high-temperature coal slurry pumps is of significant practical importance in order to improve this situation.

[0003] A mechanical seal device for a high-temperature coal slurry pump, as described in reference announcement number CN217233879U, includes a drive shaft. A mechanical seal seat is fitted onto the outer surface of the drive shaft. A sealing groove is formed on the side of the mechanical seal seat. A retaining ring is inserted into the inner wall of the sealing groove. Static sealing rings are provided on the side of the retaining ring and on the inner wall of the sealing groove. A dynamic sealing ring is provided on the inner wall of the sealing groove. A clamping groove is formed on the side of one of the static sealing rings. A clamping spring is fixedly connected to the inner wall of the clamping groove. A clamping ring is fixedly connected to the other end of the clamping spring, and the clamping ring overlaps the side of the dynamic sealing ring. This device is for a high-temperature coal slurry pump. The mechanical seal device of the slurry pump, by setting an mounting ring and mounting bolts, facilitates the disassembly and assembly of the fixed ring and the maintenance of the mechanical seal seat. By setting a sealing ring and a sealing gasket, the sealing performance of the mechanical seal seat connection is ensured. By setting a clamping ring and a clamping spring, the dynamic sealing ring is easily clamped, thus making the whole device easy to disassemble and assemble. As can be seen from the above, although this device can be used well, the mechanical seal seat is usually not convenient to be rolled on the outside of the shaft, which makes it difficult to easily align the mechanical seal seat with the mounting ring for installation and connection, resulting in some inconvenience during use. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical seal device for high-temperature coal slurry pumps, in order to solve the problem that although the device proposed in the background art can be applied well, the mechanical seal seat is usually not convenient to be located on the outside of the shaft for rolling operations, and it is difficult to conveniently calibrate the mechanical seal seat to the mounting ring for installation and connection, which causes certain inconveniences during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical seal device for a high-temperature coal slurry pump, comprising a shaft, an upper positioning ring fixedly installed on the outer wall of the upper end of the shaft, a plurality of positioning pins installed on the outer wall of the upper positioning ring, one end of each positioning pin penetrating the upper positioning ring and fixedly connected to the outer wall of the shaft, a mechanical seal seat fitted on the outer wall of the shaft below the upper positioning ring, an upper connecting ring fixed at the bottom end of the mechanical seal seat on the outer side of the shaft, and a fixing ring fitted on the outer wall of the shaft below the upper connecting ring, the bottom end of the fixing ring being fixed... The mechanical seal has a mounting ring with several screws inside. Each mounting ring between adjacent screws has a ring hole. The top of each screw passes through an upper connecting ring and is threaded with a locking nut. An outer bearing ring is mounted on the inner wall of the mechanical seal seat. An inner bearing ring is mounted on the outer wall of the shaft inside the outer bearing ring. Several balls are movably mounted inside the outer bearing ring outside the inner bearing ring. A first upper sealing ring is mounted inside the mechanical seal seat above the inner bearing ring, and a second upper sealing ring is mounted inside the mechanical seal seat below the inner bearing ring.

[0006] Preferably, a placement ring is fixedly installed on the inner wall of the fixing ring, a second lower sealing ring is installed at the top of the placement ring, a first lower sealing ring is installed at the top of the second lower sealing ring, and the outer wall of the first lower sealing ring contacts the inner wall of the upper connecting ring. The first lower sealing ring is used to seal the lower inner wall area of ​​the upper connecting ring.

[0007] Preferably, a plurality of springs are installed at the bottom end of the mounting ring, and a movable ring is installed at the bottom end of the plurality of springs. The springs are arranged to apply a downward elastic pressure to the movable ring.

[0008] Preferably, a third lower sealing ring is installed at the bottom end of the movable ring. The outer wall of the lower end of the third lower sealing ring contacts the inner wall of the mounting ring. The third lower sealing ring is provided to seal the inner wall area of ​​the lower end of the fixed ring.

[0009] Preferably, a first sealing ring is installed on the inner wall of the lower end of the shaft, and a second sealing ring is installed on the inner wall of the third lower sealing ring. The overall sealing performance of the mechanical seal device is improved by setting the first sealing ring and the second sealing ring.

[0010] Preferably, a third sealing ring is installed on the inner wall of the second lower sealing ring, a fourth sealing ring is installed on the outer wall of the first lower sealing ring, and a fifth sealing ring is installed at the connection position between the upper connecting ring and the fixed ring. The overall sealing performance of the mechanical seal device is improved by setting the third, fourth, and fifth sealing rings.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the mechanical seal device for high temperature coal slurry pumps not only achieves the purpose of easy and convenient installation and connection of the mechanical seal device, but also ensures the stability of the mechanical seal device after installation and connection, and ensures the sealing performance of the mechanical seal device during use.

[0012] (1) The mechanical seal seat is provided with an outer bearing ring, a ball and an inner bearing ring in sequence from the outside to the inside. When the mechanical seal seat is rotated, the mechanical seal seat can be rotated conveniently on the outside of the shaft body. This allows the hole inside the upper connecting ring to be quickly aligned with the hole inside the mounting ring, making it easy to insert the screw through the upper connecting ring. This achieves the purpose of easy installation and connection of the mechanical seal device.

[0013] (2) The upper connecting ring is fixedly connected to the mounting ring by the lower end of several screws. When the upper connecting ring is placed on the top of the fixed ring, the upper ends of several screws are all inserted through the upper connecting ring. Then, the locking nut is tightened on the outer wall of the screws so that the bottom end of the locking nut contacts the top end of the upper connecting ring. The upper connecting ring and the mounting ring can be bolted together, thus ensuring the stability of the mechanical seal device after installation and connection.

[0014] (3) The spring has good elasticity, so that it applies elastic pressure to the third lower sealing ring through the movable ring, so that the third lower sealing ring is installed at the connection position between the fixed ring and the mounting ring. At the same time, an upper connecting ring is installed at the connection position between the upper connecting ring and the fixed ring. A second upper sealing ring and a first upper sealing ring are respectively set at the connection position between the upper connecting ring and the shaft and the connection position between the mechanical seal seat and the shaft, so as to perform initial sealing work on the mechanical seal device. Then, by setting the second sealing ring, the third sealing ring, the fourth sealing ring and the fifth sealing ring, the connection area of ​​each component of the mechanical seal device is further sealed, thereby ensuring the sealing performance of the mechanical seal device during use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a front view schematic diagram of the appearance structure of this utility model;

[0017] Figure 3 This is a frontal cross-sectional view of the present invention.

[0018] Figure 4 This is a side view sectional structural diagram of the present invention.

[0019] In the diagram: 1. Shaft; 2. Upper locating ring; 3. Locating pin; 4. Mechanical seal seat; 5. Upper connecting ring; 6. Fixing ring; 7. Mounting ring; 701. Ring hole; 8. Screw; 9. Locking nut; 10. Outer bearing ring; 11. Inner bearing ring; 12. Ball bearing; 13. First upper sealing ring; 14. Second upper sealing ring; 15. First lower sealing ring; 16. Second lower sealing ring; 17. Placement ring; 18. Spring; 19. Movable ring; 20. Third lower sealing ring; 21. First sealing ring; 22. Second sealing ring; 23. Third sealing ring; 24. Fourth sealing ring; 25. Fifth sealing ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1-4 An embodiment of this utility model provides a mechanical seal device for a high-temperature coal slurry pump, comprising a shaft 1, an upper positioning ring 2 fixedly installed on the outer wall of the upper end of the shaft 1, a plurality of positioning pins 3 installed on the outer wall of the upper positioning ring 2, one end of the positioning pins 3 passing through the upper positioning ring 2 and fixedly connected to the outer wall of the shaft 1, a mechanical seal seat 4 fitted on the outer wall of the shaft 1 below the upper positioning ring 2, an upper connecting ring 5 fixedly installed at the bottom end of the mechanical seal seat 4 on the outer side of the shaft 1, a fixing ring 6 fitted on the outer wall of the shaft 1 below the upper connecting ring 5, a placement ring 17 fixedly installed on the inner wall of the fixing ring 6, a second lower sealing ring 16 installed at the top end of the placement ring 17, a first lower sealing ring 15 installed at the top end of the second lower sealing ring 16, and the outer wall of the first lower sealing ring 15 contacting the inner wall of the upper connecting ring 5;

[0022] In use, the first lower sealing ring 15 is used to seal the inner wall area of ​​the lower end of the upper connecting ring 5;

[0023] A plurality of springs 18 are installed at the bottom end of the mounting ring 17, and a movable ring 19 is installed at the bottom end of the plurality of springs 18;

[0024] In use, the spring 18 is set so that a downward elastic pressure is applied to the movable ring 19;

[0025] A third lower sealing ring 20 is installed at the bottom of the movable ring 19, and the outer wall of the lower end of the third lower sealing ring 20 contacts the inner wall of the mounting ring 7.

[0026] In use, the third lower sealing ring 20 is set to seal the inner wall area of ​​the lower end of the fixing ring 6;

[0027] A first sealing ring 21 is installed on the inner wall of the lower end of the shaft 1, and a second sealing ring 22 is installed on the inner wall of the third lower sealing ring 20.

[0028] In use, the overall sealing performance of the mechanical seal device is improved by setting the first sealing ring 21 and the second sealing ring 22.

[0029] A third sealing ring 23 is installed on the inner wall of the second lower sealing ring 16, a fourth sealing ring 24 is installed on the outer wall of the first lower sealing ring 15, and a fifth sealing ring 25 is installed at the connection position between the upper connecting ring 5 and the fixed ring 6.

[0030] In use, the overall sealing performance of the mechanical seal device is improved by setting the third sealing ring 23, the fourth sealing ring 24 and the fifth sealing ring 25.

[0031] A mounting ring 7 is fixed to the bottom end of the fixing ring 6. Several screws 8 are provided inside the mounting ring 7. Each mounting ring 7 between adjacent screws 8 has a ring hole 701. The top end of the screw 8 passes through the upper connecting ring 5 and is threaded with a locking nut 9. An outer bearing ring 10 is installed on the inner wall of the mechanical seal seat 4. An inner bearing ring 11 is installed on the outer wall of the shaft 1 inside the outer bearing ring 10. Several balls 12 are movably installed inside the outer bearing ring 10 outside the inner bearing ring 11. A first upper sealing ring 13 is installed inside the mechanical seal seat 4 above the inner bearing ring 11. A second upper sealing ring 14 is installed inside the mechanical seal seat 4 below the inner bearing ring 11.

[0032] In this embodiment, an outer bearing ring 10, a ball bearing 12, and an inner bearing ring 11 are sequentially arranged from the outside to the inside of the mechanical seal seat 4. When the mechanical seal seat 4 is rotated, it can be easily rotated outside the shaft 1, allowing the hole inside the upper connecting ring 5 to be quickly aligned with the hole inside the mounting ring 7. This facilitates the insertion of the screw 8 through the upper connecting ring 5 for subsequent connection work. The lower ends of several screws 8 are then fixedly connected to the mounting ring 7. When the upper connecting ring 5 is positioned at the top of the fixing ring 6, the upper ends of several screws 8 are inserted through the upper connecting ring 5. Then, the locking nut 9 is tightened on the outer wall of the screw 8, causing the bottom end of the locking nut 9 to contact the top end of the upper connecting ring 5, thus bolting the upper connecting ring 5 to the mounting ring 7. The connection process is as follows: the spring 18, with its good elasticity, applies elastic pressure to the third lower sealing ring 20 via the movable ring 19, thus installing the third lower sealing ring 20 at the connection position between the fixed ring 6 and the mounting ring 7. At the same time, an upper connecting ring 5 is installed at the connection position between the upper connecting ring 5 and the fixed ring 6. A second upper sealing ring 14 and a first upper sealing ring 13 are respectively provided at the connection positions between the upper connecting ring 5 and the shaft 1 and between the mechanical seal seat 4 and the shaft 1, to initially seal the mechanical seal device. Then, the second sealing ring 22, the third sealing ring 23, the fourth sealing ring 24, and the fifth sealing ring 25 are set to further seal the connection areas of the various components of the mechanical seal device, thereby completing the use of the mechanical seal device.

Claims

1. A mechanical seal device for a high-temperature coal slurry pump, characterized in that: The assembly includes a shaft (1), on which an upper positioning ring (2) is fixedly installed. Several positioning pins (3) are installed on the outer wall of the upper positioning ring (2). One end of each positioning pin (3) passes through the upper positioning ring (2) and is fixedly connected to the outer wall of the shaft (1). A mechanical seal seat (4) is fitted on the outer wall of the shaft (1) below the upper positioning ring (2). An upper connecting ring (5) is fixed to the bottom end of the mechanical seal seat (4) on the outer side of the shaft (1). A fixing ring (6) is fitted on the outer wall of the shaft (1) below the upper connecting ring (5). An installation ring (7) is fixed to the bottom end of the fixing ring (6). Several screws (8) are provided inside the installation ring (7). The mounting rings (7) between the screws (8) are all provided with ring holes (701). The top of the screw (8) passes through the upper connecting ring (5) and is threaded with a locking nut (9). An outer bearing ring (10) is installed on the inner wall of the mechanical seal seat (4). An inner bearing ring (11) is installed on the outer wall of the shaft (1) inside the outer bearing ring (10). Several balls (12) are movably installed inside the outer bearing ring (10) outside the inner bearing ring (11). A first upper sealing ring (13) is installed inside the mechanical seal seat (4) above the inner bearing ring (11). A second upper sealing ring (14) is installed inside the mechanical seal seat (4) below the inner bearing ring (11).

2. The mechanical seal device for a high-temperature coal slurry pump according to claim 1, characterized in that: A placement ring (17) is fixedly installed on the inner wall of the fixing ring (6). A second lower sealing ring (16) is installed at the top of the placement ring (17). A first lower sealing ring (15) is installed at the top of the second lower sealing ring (16). The outer wall of the first lower sealing ring (15) contacts the inner wall of the upper connecting ring (5).

3. A mechanical seal device for a high-temperature coal slurry pump according to claim 2, characterized in that: The bottom end of the mounting ring (17) is equipped with a plurality of springs (18), and the bottom end of the plurality of springs (18) is equipped with a movable ring (19).

4. A mechanical seal device for a high-temperature coal slurry pump according to claim 3, characterized in that: The bottom end of the movable ring (19) is equipped with a third lower sealing ring (20), and the outer wall of the lower end of the third lower sealing ring (20) contacts the inner wall of the mounting ring (7).

5. A mechanical seal device for a high-temperature coal slurry pump according to claim 4, characterized in that: A first sealing ring (21) is installed on the inner wall of the lower end of the shaft (1), and a second sealing ring (22) is installed on the inner wall of the third lower sealing ring (20).

6. A mechanical seal device for a high-temperature coal slurry pump according to claim 2, characterized in that: A third sealing ring (23) is installed on the inner wall of the second lower sealing ring (16), a fourth sealing ring (24) is installed on the outer wall of the first lower sealing ring (15), and a fifth sealing ring (25) is installed at the connection position between the upper connecting ring (5) and the fixing ring (6).

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