A circulating water pump shaft sealing device

Abstract

The present application discloses a circulating water pump shaft sealing device, wherein the sealing assembly is arranged in two half arcs to improve the convenience of installation and removal. The sealing assembly comprises a sealing gland and a dynamic ring seat, a dynamic ring, a static ring, a push ring and a spring arranged in sequence along the axial direction of the rotating shaft. A dynamic ring seat sealing ring is arranged on the inner side of the dynamic ring seat, and dynamic and static ring sealing rings are arranged on the outer sides of the dynamic and static rings respectively. The spring is fixed on one side of the push ring and the sealing gland. The dynamic ring seat, the dynamic ring, the static ring and the corresponding dynamic ring seat sealing ring, the dynamic ring sealing ring and the static ring sealing ring are arranged in coordination to improve the sealing effect. The arrangement of the spring and the sealing gland can ensure the stability and firmness of the dynamic ring seat, the dynamic ring and the static ring, and further improve the sealing effect. A water injection hole is arranged on the sealing gland. During operation, water can be injected into the gap between the dynamic and static rings through the water injection hole to reduce the friction load and temperature between the rotating shaft and the dynamic and static rings, and to wash away the silicon carbide powder generated there, thereby reducing the rotating shaft power and the replacement cost of the sealing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating water pump application, in particular to a circulating water pump rotating shaft sealing device. Background Art

[0002] In the process of coal and petroleum processing and production, a circulating water pump is usually used to provide circulating water for the corresponding equipment in the operating system so that the corresponding equipment in the operating system can operate normally. During the use of the circulating water pump, in order to prevent the medium in the cavity from being discharged outward along the axis of the shaft, a sealing assembly needs to be provided on the shaft. However, the existing sealing assembly has poor sealing effect, and the installation and disassembly process is complicated and troublesome. In addition, during the rotation of the shaft, the friction load between the shaft and the sealing assembly is large, the temperature is high, and silicon carbide powder impurities are easily generated during use, which leads to high shaft power and sealing assembly replacement costs. Utility Model Content

[0003] The purpose of the present application is to provide a circulating water pump shaft sealing device to solve the problems that the existing sealing assembly has poor sealing effect, and the installation and disassembly process is complicated and troublesome, and during the rotation of the shaft, the friction load between the shaft and the sealing assembly is large, the temperature is high, and silicon carbide powder impurities are easily generated, which leads to high shaft power and sealing assembly replacement costs.

[0004] In order to solve the above technical problems, the present application provides a circulating water pump shaft sealing device, comprising:

[0005] A sealing assembly arranged in two half arcs, the sealing assembly comprising a sealing cover and a dynamic ring seat, a dynamic ring, a static ring, a push ring and a spring arranged in sequence along the axial direction of the rotating shaft, a dynamic ring seat sealing ring is arranged on the inner side of the dynamic ring seat, a dynamic ring sealing ring is arranged on the outer side of the dynamic ring, and a static ring sealing ring is arranged on the outer side of the static ring, the sealing cover is sleeved on the outer side of the dynamic ring seat, the dynamic ring, the static ring, the push ring and the spring, the spring is fixedly arranged on one side of the push ring and the sealing cover, the sealing cover is provided with water injection holes corresponding to the dynamic ring and the static ring, and the sealing assembly is fixed by bolts.

[0006] On the basis of the above embodiments, as a preferred implementation mode, a gland sealing ring is further provided at the contact position between the sealing gland and the cavity of the circulating water pump.

[0007] On the basis of the above embodiment, as a preferred implementation manner, a positioning strip is further fixed to one side of the sealing gland by screws, and one end of the positioning strip extends to where the dynamic ring is located.

[0008] What needs to be explained in detail in the solution is that a step pin is also fixed between the sealing cover and the push ring.

[0009] On the basis of the above embodiment, as a preferred implementation manner, a threaded pin is further fixed between the moving ring seat and the moving ring.

[0010] It should be further explained that the moving ring seat is also provided with locking screws along its radial direction.

[0011] On the basis of the above embodiment, as a preferred implementation manner, the water injection hole is arranged obliquely, and the water injection hole is arranged on the upper arc-shaped gland of the sealing gland.

[0012] On the basis of the above-mentioned embodiment, as a preferred implementation mode, a hanging ring is further provided on the upper arc-shaped gland.

[0013] Compared with the prior art, the utility model provides a circulating water pump shaft sealing device, including a sealing component arranged in two half arcs, the sealing components are fixed by bolts, and the sealing component is arranged in two half arcs to improve the convenience of installation and removal. The sealing component includes a sealing gland and a dynamic ring seat, a dynamic ring, a static ring, a push ring and a spring arranged in sequence along the axial direction of the rotating shaft, a dynamic ring seat sealing ring is arranged on the inner side of the dynamic ring seat, a dynamic ring sealing ring is arranged on the outer side of the dynamic ring, and a static ring sealing ring is arranged on the outer side of the static ring. The sealing gland is sleeved on the outer periphery of the dynamic ring seat, the dynamic ring, the static ring, the push ring and the spring, and the spring is fixedly arranged on one side of the push ring and the sealing gland. At the same time, the dynamic ring seat, the dynamic ring, the static ring and the corresponding dynamic ring seat sealing ring, the dynamic ring sealing ring and the static ring sealing ring are arranged to improve the sealing effect. The arrangement of the spring and the sealing gland can ensure the installation and use stability and firmness of the dynamic ring seat, the dynamic ring and the static ring, and further improve the sealing effect. The sealing cover is provided with water injection holes corresponding to the dynamic ring and the static ring. During the operation of the rotating shaft, water can be injected into the gap between the dynamic ring and the static ring through the water injection holes to reduce the friction load and temperature between the rotating shaft and the dynamic ring and the static ring, thereby playing a lubricating role and flushing the silicon carbide powder generated here, thereby reducing the rotating shaft power and the replacement cost of the sealing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a circulating water pump shaft sealing device provided in an embodiment of the present application;

[0016] Figure 2 A schematic cross-sectional structure diagram of a circulating water pump shaft sealing device provided in an embodiment of the present application;

[0017] Figure 3 A schematic cross-sectional structure diagram of another circulating water pump shaft sealing device provided in an embodiment of the present application;

[0018] In the figure: 1. sealing cover; 2. rotating shaft; 3. moving ring seat; 4. moving ring; 5. stationary ring; 6. push ring; 7. spring; 8. moving ring seat sealing ring; 9. moving ring sealing ring; 10. stationary ring sealing ring; 11. water injection hole; 12. bolt; 13. cover sealing ring; 14. screw; 15. positioning strip; 16. step pin; 17. threaded pin; 18. locking screw; 19. upper arc cover; 20. lifting ring; 21. lower arc cover; 22. cavity. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] The core of this application is to provide a circulating water pump shaft sealing device, which solves the problems of poor sealing effect of existing sealing components, complicated and troublesome installation and disassembly processes, and large friction load and high temperature between the shaft and the sealing component during the rotation of the shaft, which easily generates silicon carbide powder impurities, thereby leading to high shaft power and sealing component replacement costs.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a circulating water pump shaft sealing device provided in an embodiment of the present application. Figure 2 This is a schematic cross-sectional structure diagram of a circulating water pump shaft sealing device provided in an embodiment of the present application. Figure 3 A schematic cross-sectional view of another circulating water pump shaft sealing device provided in the embodiment of the present application is shown in FIG. Figures 1 to 3 shown.

[0022] Example 1

[0023] A circulating water pump shaft sealing device includes a sealing component, which is arranged in two half arcs. This structural arrangement can improve the convenience of installation and disassembly of the sealing component. The sealing component includes a sealing gland 1 and a dynamic ring seat 3, a dynamic ring 4, a static ring 5, a push ring 6 and a spring 7 arranged in sequence along the axial direction of a rotating shaft 2. After installation, the dynamic ring seat 3 is arranged close to a medium side A, and the spring 7 is arranged close to an atmospheric side B. A dynamic ring seat sealing ring 8 is arranged on the inner side of the dynamic ring seat 3, and a dynamic ring sealing ring 9 is arranged on the outer side of the dynamic ring 4. The outer side of the stationary ring 5 is provided with a stationary ring seal 10. The arrangement of the dynamic ring seat seal 8, the dynamic ring seal 9 and the stationary ring seal 10 can improve the sealing effect. After installation, the sealing gland 1 is sleeved on the outer side of the dynamic ring seat 3, the dynamic ring 4, the stationary ring 5, the push ring 6 and the spring 7, which can ensure the installation stability and firmness of the dynamic ring seat 3, the dynamic ring 4, the stationary ring 5, the push ring 6 and the spring 7. The spring 7 is fixedly arranged on one side of the push ring 6 and the sealing gland 1, so as to fix the push ring 6 and the sealing gland 1. The sealing gland 1 is provided with a water injection hole 11 corresponding to the dynamic ring 4 and the stationary ring 5. When in use, water can be injected through the water injection hole 11 so as to flow to the gap between the dynamic ring 4 and the stationary ring 5, reduce the friction load and temperature between the rotating shaft 2 and the dynamic ring 4 and the stationary ring 5, play a role in lubrication, and at the same time, wash the silicon carbide powder generated here. After that, the water will flow into the cavity 22 of the circulating water pump through the axial direction of the rotating shaft 2 for recycling. After installation, the sealing components are fixed by bolts 12 , specifically, two semi-arc-shaped sealing glands 1 are fixed by bolts 12 .

[0024] Example 2

[0025] On the basis of Example 1, a circulating water pump shaft sealing device is provided. To further improve the sealing effect, preferably, a gland sealing ring 13 is further provided at the contact position between the sealing gland 1 and the cavity 22 of the circulating water pump.

[0026] On the basis of Example 1, a circulating water pump shaft sealing device is provided. In order to ensure that the dynamic ring 4 and the static ring 5 are moved and misaligned during installation, preferably, during installation, a positioning strip 15 is fixed on one side of the sealing cover 1 by a screw 14. One end of the positioning strip 15 extends to the location of the dynamic ring 4. After the installation is completed, the positioning strip 15 needs to be removed.

[0027] On the basis of Example 1, a circulating water pump shaft sealing device is provided. In order to improve the installation stability between the sealing gland 1 and the push ring 6, preferably, a step pin 16 is also fixed between the sealing gland 1 and the push ring 6.

[0028] On the basis of Example 1, a circulating water pump shaft sealing device is provided. In order to improve the installation stability between the dynamic ring seat 3 and the dynamic ring 4 , preferably, a threaded pin 17 is further fixed between the dynamic ring seat 3 and the dynamic ring 4 .

[0029] On the basis of Example 1, a circulating water pump shaft sealing device is provided. In order to improve the installation stability of the dynamic ring seat 3, preferably, a locking screw 18 is also provided on the dynamic ring seat 3 along its radial direction. After installation, the lower end of the locking screw 18 is in conflict with the rotating shaft 2, but does not affect the normal rotation of the rotating shaft 2.

[0030] On the basis of Example 1, a circulating water pump shaft sealing device, in order to facilitate the convenience of water injection, preferably, the water injection hole 11 can be set in an inclined state, and the water injection hole 11 is set on the upper arc-shaped pressure cover 19 of the sealing pressure cover 1, specifically, the sealing pressure cover 1 includes an upper arc-shaped pressure cover 19 and a lower arc-shaped pressure cover 21, and the water injection hole 11 is only set on the upper arc-shaped pressure cover 19.

[0031] In this embodiment, a circulating water pump shaft sealing device is provided. In order to facilitate installation and removal of the sealing gland 1, preferably, a lifting ring 20 is further provided on the upper arc-shaped gland 19.

[0032] The utility model provides a circulating water pump shaft sealing device, comprising a sealing component arranged in two half arcs, the sealing components are fixed by bolts 12, and the sealing component is arranged in two half arcs to improve the convenience of installation and removal. The sealing component comprises a sealing gland 1 and a dynamic ring seat 3, a dynamic ring 4, a static ring 5, a push ring 6 and a spring 7 arranged in sequence along the axial direction of the rotating shaft 2, a dynamic ring seat sealing ring 8 is arranged on the inner side of the dynamic ring seat 3, a dynamic ring sealing ring 9 is arranged on the outer side of the dynamic ring 4, and a static ring sealing ring 10 is arranged on the outer side of the static ring 5, the sealing gland 1 is sleeved on the outer side of the dynamic ring seat 3, the dynamic ring 4, the static ring 5, the push ring 6 and the spring 7, the spring 7 is fixedly arranged on one side of the push ring 6 and the sealing gland 1, and the dynamic ring seat 3, the dynamic ring 4, the static ring 5 and the corresponding dynamic ring seat sealing ring 8, the dynamic ring sealing ring 9 and the static ring sealing ring 10 are arranged at the same time to improve the sealing effect, and the arrangement of the spring 7 and the sealing gland 1 can ensure the installation and use stability and firmness of the dynamic ring seat 3, the dynamic ring 4 and the static ring 5, and further improve the sealing effect. The sealing cover 1 is provided with water injection holes 11 corresponding to the dynamic ring 4 and the static ring 5. During the operation of the rotating shaft 2, water can be injected into the gap between the dynamic ring 4 and the static ring 5 through the water injection holes 11 to reduce the friction load and temperature between the rotating shaft 2 and the dynamic ring 4 and the static ring 5, thereby playing a lubricating role and flushing the silicon carbide powder generated here, thereby reducing the power of the rotating shaft 2 and the replacement cost of the sealing component.

[0033] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art disclosed in the present application. The specification and examples are to be regarded as exemplary only, and the true scope of the present application is indicated by the claims.

[0034] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A circulating water pump shaft sealing device, characterized in that: include: A sealing component is arranged in two half arcs, the sealing component comprising a sealing gland (1) and a moving ring seat (3), a moving ring (4), a stationary ring (5), a push ring (6) and a spring (7) arranged in sequence along the axial direction of a rotating shaft (2); a moving ring seat sealing ring (8) is arranged on the inner side of the moving ring seat (3), a moving ring sealing ring (9) is arranged on the outer side of the moving ring (4), and a stationary ring sealing ring (10) is arranged on the outer side of the stationary ring (5); the sealing gland (1) is sleeved on the outer sides of the moving ring seat (3), the moving ring (4), the stationary ring (5), the push ring (6) and the spring (7); the spring (7) is fixedly arranged on one side of the push ring (6) and the sealing gland (1); a water injection hole (11) corresponding to the moving ring (4) and the stationary ring (5) is arranged on the sealing gland (1); and the sealing components are fixed by bolts (12).

2. The circulating water pump shaft sealing device according to claim 1, characterized in that: A gland sealing ring (13) is also provided at the contact position between the sealing gland (1) and the cavity (22) of the circulating water pump.

3. The circulating water pump shaft sealing device according to claim 1, characterized in that: A positioning strip (15) is also fixed to one side of the sealing gland (1) by means of a screw (14), and one end of the positioning strip (15) extends to where the moving ring (4) is located.

4. The circulating water pump shaft sealing device according to claim 1, characterized in that: A step pin (16) is also fixed between the sealing gland (1) and the push ring (6).

5. The circulating water pump shaft sealing device according to claim 1, characterized in that: A threaded pin (17) is also fixed between the moving ring seat (3) and the moving ring (4).

6. The circulating water pump shaft sealing device according to claim 1, characterized in that: The moving ring seat (3) is also provided with locking screws (18) along its radial direction.

7. The circulating water pump shaft sealing device according to claim 1, characterized in that: The water injection hole (11) is arranged at an angle, and the water injection hole (11) is arranged on the upper arc-shaped gland (19) of the sealing gland (1).

8. The circulating water pump shaft sealing device according to claim 7, characterized in that: The upper arc-shaped gland (19) is also provided with a lifting ring (20).

Images