Combined floating ring sealing device for centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pump floating ring sealing, in particular to a combined floating ring sealing device for a centrifugal pump, which comprises a mounting base, a pump body fixedly mounted at the upper end of the mounting base, a mechanical seal gland arranged at the side end of the pump body, a mechanical seal static ring arranged in the mechanical seal gland, a first sealing ring arranged at the side end of the mechanical seal static ring, and a second sealing ring arranged at the side end of the second sealing ring. The combined type floating ring sealing device for the centrifugal pump is characterized in that a mechanical seal pressing cover is arranged on the base, a mechanical seal ring sleeve is arranged in the mechanical seal pressing cover, a second sealing ring is arranged on one side of the mechanical seal ring sleeve, a mechanical seal floating ring is arranged on one side of the mechanical seal ring sleeve, and the second sealing ring is located between the mechanical seal ring sleeve and the mechanical seal floating ring. When the centrifugal pump floating ring is assembled, the threaded sealing ring is rotated to drive the adjusting sealing ring, and the adjusting sealing ring moves to extrude the spring, so that the gap of the spring is adjusted, the gap of the spring is prevented from being too large or too small, and the applicability of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of floating ring seals for centrifugal pumps, and particularly relates to a combined floating ring seal device for a centrifugal pump. Background Technique

[0002] The floating seal ring of a centrifugal pump, simply called a floating ring, is a floating seal or piston seal ring, which plays a key sealing role in equipment such as centrifugal pumps. The floating seal ring is a non-contact dynamic seal device, which restricts fluid leakage through the extremely small gap between the floating metal ring and the shaft or the housing. The floating ring seal is mainly composed of a floating ring, a support ring (floating sleeve), a spring, etc. The floating ring can float freely in the housing, so the influence on the seal when the shaft rotates at high speed and vibrates is small, and the friction and wear are also very small.

[0003] The spring in the floating seal ring of a centrifugal pump is one of the key components to ensure the sealing effect. If the spring gap is too large, it may lead to insufficient tight sealing contact between the seal ring and the shaft or the housing, thus affecting the sealing effect and increasing the leakage of the pump. If the spring gap is too small, it may lead to an increase in the friction between the seal ring and the shaft or the housing, thus increasing the wear of the seal ring and shortening its service life. However, the spring gap in the traditional floating seal ring of a centrifugal pump lacks an adjustment mechanism, so it cannot meet the usage requirements. Therefore, to solve the above problems, we propose a combined floating ring seal device for a centrifugal pump. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a combined floating ring seal device for a centrifugal pump, which solves the technical problems that the spring in the floating seal ring of a centrifugal pump is one of the key components to ensure the sealing effect. If the spring gap is too large, it may lead to insufficient tight sealing contact between the seal ring and the shaft or the housing, thus affecting the sealing effect and increasing the leakage of the pump. If the spring gap is too small, it may lead to an increase in the friction between the seal ring and the shaft or the housing, thus increasing the wear of the seal ring and shortening its service life. However, the spring gap in the traditional floating seal ring of a centrifugal pump lacks an adjustment mechanism, so it cannot meet the usage requirements.

[0006] (2) Technical Solutions

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0008] A combined floating ring seal device for a centrifugal pump, comprising an installation base. A pump body is fixedly installed at the upper end of the installation base. A mechanical seal gland is arranged at the side end of the pump body. A mechanical seal stationary ring is arranged inside the mechanical seal gland. A first sealing ring is arranged at the side end of the mechanical seal stationary ring. A mechanical seal ring sleeve is arranged inside the mechanical seal gland. A second sealing ring is arranged on one side of the mechanical seal ring sleeve. A mechanical seal floating ring is arranged on one side of the mechanical seal ring sleeve. The second sealing ring is located between the mechanical seal ring sleeve and the mechanical seal floating ring. A spring is fixedly installed at the side end of the mechanical seal floating ring. An adjusting seal ring is fixedly installed at the side end of the spring. An adjusting sleeve is arranged inside the mechanical seal gland. A threaded seal ring is installed inside the adjusting sleeve by means of threads. The mechanical seal floating ring is slidably installed on the inner side wall of the adjusting sleeve. The adjusting seal ring is slidably installed on the inner side wall of the adjusting sleeve. The second sealing ring and the adjusting sleeve are fixedly connected to each other.

[0009] Preferably: A driving motor is fixedly installed on the upper part of the installation base. A shaft protection sleeve is fixedly installed at the side end of the mechanical seal gland. The shaft protection sleeve is fixedly connected to the side end of the driving motor. A centrifugal pump impeller is arranged inside the pump body. A pump shaft is fixedly installed at the side end of the centrifugal pump impeller. The pump shaft is fixedly connected to the output shaft of the driving motor.

[0010] Preferably: The mechanical seal stationary ring is fixedly connected to the mechanical seal gland. The mechanical seal stationary ring is sleeved on the outer side of the pump shaft. The mechanical seal ring sleeve is sleeved on the outer side of the pump shaft. The second sealing ring is sleeved on the outer side of the pump shaft. The mechanical seal floating ring is sleeved on the outer side of the pump shaft. The adjusting seal ring is sleeved on the outer side of the pump shaft. The threaded seal ring is sleeved on the outer side of the pump shaft.

[0011] (III) Beneficial effects

[0012] First, rotate the threaded seal ring. The threaded seal ring is forced to rotate in a threaded manner inside the adjusting sleeve. The threaded rotation of the threaded seal ring adjusts and squeezes the adjusting seal ring. The adjusting seal ring is forced to squeeze the spring. The spring deforms under the force, thereby completing the adjustment of the spring gap. By designing the spring of the combined floating ring seal device for a centrifugal pump to have an adjustable gap, when assembling the floating ring of the centrifugal pump, rotating the threaded seal ring drives the adjusting seal ring, and the adjusting seal ring moves to squeeze the spring, thereby realizing the adjustment of the spring gap, avoiding the spring gap being too large or too small, and effectively improving the applicability of the device.

[0013] Second, disconnect the connection between the pump shaft and the output shaft of the driving motor. Then, release the limit of the threaded seal ring on the pump shaft. Rotate the threaded seal ring and remove it from the adjusting sleeve. Then, perform maintenance and repair on the mechanical seal floating ring, spring and adjusting seal ring. By designing and installing a threaded seal ring on the combined floating ring seal device for a centrifugal pump, when performing maintenance and repair on the seal ring of the centrifugal pump, rotating the threaded seal ring can achieve the separate and quick disassembly of the mechanical seal floating ring. Thus, the practicality of the device is effectively improved. Description of the drawings

[0014] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings.

[0015] Figure 1 It is a structural diagram of the pump body of the present utility model;

[0016] Figure 2 It is a structural diagram of the dissection of the pump body of the present utility model;

[0017] Figure 3 It is a structural diagram of the three-dimensional explosion decomposition of the combined floating ring seal device of the present utility model;

[0018] Figure 4 For the present utility model Figure 2 The enlarged structural diagram at position A.

[0019] Legend: 1. Installation base; 11. Driving motor; 12. Pump body; 13. Mechanical seal gland; 14. Shaft protection sleeve; 15. Centrifugal pump impeller; 16. Pump shaft; 2. Mechanical seal static ring; 21. Seal ring 1; 22. Mechanical seal ring sleeve; 23. Seal ring 2; 25. Mechanical seal floating ring; 26. Spring; 27. Adjusting seal ring; 28. Adjusting sleeve; 29. Threaded seal ring. Detailed implementation manners

[0020] In the embodiment of the present application, by providing a combined floating ring seal device for a centrifugal pump, it effectively solves the technical problem that the spring in the floating seal ring of the centrifugal pump is one of the key components to ensure the sealing effect. If the spring gap is too large, it may cause the sealing contact between the seal ring and the shaft or the housing to be insufficiently tight, thereby affecting the sealing effect and increasing the leakage of the pump. If the spring gap is too small, it may cause the friction between the seal ring and the shaft or the housing to increase, thereby increasing the wear of the seal ring and shortening its service life. However, the traditional centrifugal pump floating seal ring lacks an adjustment mechanism for the spring gap, so it cannot meet the use requirements.

[0021] Embodiment

[0022] According to Figure 1 、 Figure 2 、 Figure 3 、and Figure 4As shown in the figure, the technical solution in the embodiment of the present application effectively solves the technical problem that the spring in the floating seal ring of a centrifugal pump is one of the key components to ensure the sealing effect. If the spring gap is too large, it may cause the sealing contact between the seal ring and the shaft or the housing to be insufficiently tight, thereby affecting the sealing effect and increasing the leakage of the pump. If the spring gap is too small, it may cause an increase in friction between the seal ring and the shaft or the housing, thereby increasing the wear of the seal ring and shortening its service life. However, the spring gap in the traditional floating seal ring of a centrifugal pump lacks an adjustment mechanism, so it cannot meet the usage requirements. The general idea is as follows:

[0023] In view of the problems existing in the prior art, the present utility model provides a combined floating ring seal device for a centrifugal pump, including an installation base 1. The upper end of the installation base 1 is fixedly installed with a pump body 12. A mechanical seal gland 13 is arranged at the side end of the pump body 12. A mechanical seal stationary ring 2 is arranged inside the mechanical seal gland 13. A first sealing ring 21 is arranged at the side end of the mechanical seal stationary ring 2. A mechanical seal ring sleeve 22 is arranged inside the mechanical seal gland 13. A second sealing ring 23 is arranged on one side of the mechanical seal ring sleeve 22. A mechanical seal floating ring 25 is arranged on one side of the mechanical seal ring sleeve 22. Among them, the second sealing ring 23 is located between the mechanical seal ring sleeve 22 and the mechanical seal floating ring 25. A spring 26 is fixedly installed at the side end of the mechanical seal floating ring 25. An adjusting seal ring 27 is fixedly installed at the side end of the spring 26. An adjusting sleeve 28 is arranged inside the mechanical seal gland 13. A threaded seal ring 29 is installed inside the adjusting sleeve 28 by threading. Among them, the mechanical seal floating ring 25 is slidably installed on the inner side wall of the adjusting sleeve 28, and the adjusting seal ring 27 is slidably installed on the inner side wall of the adjusting sleeve 28. The second sealing ring 23 and the adjusting sleeve 28 are fixedly connected. The first sealing ring 21 is sleeved on the mechanical seal stationary ring 2, and then the mechanical seal stationary ring 2 is sleeved on the pump shaft 16. Then, the mechanical seal stationary ring 2 is placed in the built-in groove of the mechanical seal gland 13. Then, the mechanical seal ring sleeve 22 is sleeved on the pump shaft 16, and the mechanical seal ring sleeve 22 is placed on one side of the mechanical seal stationary ring 2. Then, the second sealing ring 23 is sleeved on the pump shaft 16, and the second sealing ring 23 drives the adjusting sleeve 28 to be sleeved on the pump shaft 16. The second sealing ring 23 is installed in the mechanical seal ring sleeve 22. Then, the mechanical seal floating ring 25, the spring 26, and the adjusting seal ring 27 are sleeved on the pump shaft 16. The mechanical seal floating ring 25, the spring 26, and the adjusting seal ring 27 are slidably installed inside the adjusting sleeve 28. Then, the threaded seal ring 29 is installed inside the adjusting sleeve 28 by threading. The threaded seal ring 29 is rotated. The threaded seal ring 29 is forced to rotate threadedly inside the adjusting sleeve 28. The threaded seal ring 29 rotates threadedly to adjust and squeeze the adjusting seal ring 27. The adjusting seal ring 27 is forced to squeeze the spring 26, and the spring 26 is forced to deform, thereby completing the adjustment of the spring gap.

[0024] A driving motor 11 is fixedly installed on the upper part of the installation base 1. A shaft protective sleeve 14 is fixedly installed at the side end of the mechanical seal gland 13. The shaft protective sleeve 14 is fixedly connected to the side end of the driving motor 11. A centrifugal pump impeller 15 is arranged inside the pump body 12. A pump shaft 16 is fixedly installed at the side end of the centrifugal pump impeller 15. The pump shaft 16 is fixedly connected to the output shaft of the driving motor 11. The mechanical seal static ring 2 is fixedly connected to the mechanical seal gland 13. The mechanical seal static ring 2 is sleeved on the outside of the pump shaft 16. The mechanical seal ring sleeve 22 is sleeved on the outside of the pump shaft 16. The sealing ring II 23 is sleeved on the outside of the pump shaft 16. The mechanical seal floating ring 25 is sleeved on the outside of the pump shaft 16. The adjusting seal ring 27 is sleeved on the outside of the pump shaft 16. The threaded seal ring 29 is sleeved on the outside of the pump shaft 16. Disconnect the fixed connection between the shaft protective sleeve 14 and the driving motor 11, then disconnect the connection between the pump shaft 16 and the output shaft of the driving motor 11, and then release the limit of the threaded seal ring 29 on the pump shaft 16. Rotate the threaded seal ring 29 and remove it from the adjusting sleeve 28. Then, perform maintenance on the mechanical seal floating ring 25, the spring 26 and the adjusting seal ring 27.

[0025] Working principle:

[0026] First step, when the combined floating ring seal device is installed on the centrifugal pump, the sealing ring I 21 is sleeved on the mechanical seal static ring 2, then the mechanical seal static ring 2 is sleeved on the pump shaft 16, and then the mechanical seal static ring 2 is placed in the built-in groove of the mechanical seal gland 13. After that, the mechanical seal ring sleeve 22 is sleeved on the pump shaft 16, and the mechanical seal ring sleeve 22 is placed on one side of the mechanical seal static ring 2. Then, the sealing ring II 23 is sleeved on the pump shaft 16. The sealing ring II 23 drives the adjusting sleeve 28 to be sleeved on the pump shaft 16. The sealing ring II 23 is installed in the mechanical seal ring sleeve 22. After that, the mechanical seal floating ring 25, the spring 26 and the adjusting seal ring 27 are sleeved on the pump shaft 16. The mechanical seal floating ring 25, the spring 26 and the adjusting seal ring 27 are slidably installed in the adjusting sleeve 28. Then, the threaded seal ring 29 is threadedly installed inside the adjusting sleeve 28. Rotate the threaded seal ring 29. The threaded seal ring 29 rotates threadedly under force inside the adjusting sleeve 28. The threaded seal ring 29 rotates threadedly to adjust and squeeze the adjusting seal ring 27. The adjusting seal ring 27 is forced to squeeze the spring 26, and the spring 26 deforms under force, thus completing the adjustment of the spring clearance. By designing the spring 26 of the combined floating ring seal device for the centrifugal pump to have an adjustable clearance, when assembling the floating ring of the centrifugal pump, rotating the threaded seal ring 29 drives the adjusting seal ring 27, and the adjusting seal ring 27 moves to squeeze the spring 26, thereby realizing the adjustment of the clearance of the spring 26, avoiding the clearance of the spring 26 being too large or too small, and effectively improving the applicability of the device.

[0027] Step 2: When the combined floating ring seal device is used for a centrifugal pump, after the centrifugal pump has been used for a long time, the sealing ring will be worn due to the friction between the sealing ring and the shaft or the housing. Therefore, it is necessary to repair and maintain the centrifugal pump. Disconnect the fixed connection between the shaft protective sleeve 14 and the drive motor 11, then disconnect the connection between the pump shaft 16 and the output shaft of the drive motor 11. After that, release the limit of the threaded sealing ring 29 on the pump shaft 16, rotate the threaded sealing ring 29, and remove it from the adjusting sleeve 28. Then, repair and maintain the mechanical seal floating ring 25, the spring 26, and the adjusting sealing ring 27. By designing and installing the threaded sealing ring 29 on the combined floating ring seal device for the centrifugal pump, when repairing and maintaining the sealing ring of the centrifugal pump, rotating the threaded sealing ring 29 can achieve the separate and quick disassembly of the mechanical seal floating ring 25. Thus, the practicability of the device is effectively improved.

[0028] Finally, it should be noted that: Obviously, the above embodiments are merely examples given for clearly illustrating the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. The obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A combined floating ring seal device for a centrifugal pump, comprising a mounting base (1), characterized in that: A pump body (12) is fixedly mounted on the upper end of the mounting base (1), an organic sealing cover (13) is arranged at the side end of the pump body (12), an organic sealing static ring (2) is arranged inside the organic sealing cover (13), a sealing ring 1 (21) is arranged at the side end of the organic sealing static ring (2), an organic sealing ring sleeve (22) is arranged inside the organic sealing cover (13), a sealing ring 2 (23) is arranged on one side of the organic sealing ring sleeve (22), and an organic sealing floating ring (25) is arranged on one side of the organic sealing ring sleeve (22); Wherein, the second sealing ring (23) is located between the mechanical seal ring sleeve (22) and the mechanical seal floating ring (25); A spring (26) is fixedly mounted on the side end of the mechanical seal floating ring (25), an adjustable sealing ring (27) is fixedly mounted on the side end of the spring (26), an adjustable sleeve (28) is arranged inside the mechanical seal gland (13), and a threaded sealing ring (29) is mounted on the inner thread of the adjustable sleeve (28); The mechanical seal floating ring (25) is slidably mounted on the inner wall of the adjustment sleeve (28), the adjustment sealing ring (27) is slidably mounted on the inner wall of the adjustment sleeve (28), and the second sealing ring (23) and the adjustment sleeve (28) are fixedly connected.

2. A combined floating ring seal device for a centrifugal pump according to claim 1, characterized in that: A drive motor (11) is fixedly mounted on the mounting base (1), a shaft protection sleeve (14) is fixedly mounted on the side end of the machine seal gland (13), and the shaft protection sleeve (14) is fixedly connected to the side end of the drive motor (11).

3. A combined floating ring seal device for a centrifugal pump according to claim 2, characterized in that: A centrifugal pump impeller (15) is arranged inside the pump body (12), a pump shaft (16) is fixedly mounted on a side end of the centrifugal pump impeller (15), and the pump shaft (16) is fixedly connected to an output shaft of a drive motor (11).

4. A combined floating ring seal device for a centrifugal pump according to claim 3, characterized in that: The mechanical seal static ring (2) is fixedly connected to the mechanical seal gland (13), and the mechanical seal static ring (2) is sleeved on the outside of the pump shaft (16).

5. A combined floating ring seal device for a centrifugal pump according to claim 4, characterized in that: The mechanical seal ring sleeve (22) is sleeved on the outer side of the pump shaft (16), and the second seal ring (23) is sleeved on the outer side of the pump shaft (16).

6. A combined floating ring seal device for a centrifugal pump according to claim 5, characterized in that: The mechanical seal floating ring (25) is sleeved on the outer side of the pump shaft (16).

7. A combined floating ring seal device for a centrifugal pump according to claim 6, characterized in that: The adjusting sealing ring (27) is sleeved on the outer side of the pump shaft (16).

8. A combined floating ring seal device for a centrifugal pump according to claim 7, characterized in that: The threaded sealing ring (29) is sleeved on the outer side of the pump shaft (16).

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