CN215672845U - Centrifugal pump sealing structure for conveying sewage containing solid particles - Google Patents
Centrifugal pump sealing structure for conveying sewage containing solid particles Download PDFInfo
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- CN215672845U CN215672845U CN202122071745.5U CN202122071745U CN215672845U CN 215672845 U CN215672845 U CN 215672845U CN 202122071745 U CN202122071745 U CN 202122071745U CN 215672845 U CN215672845 U CN 215672845U
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- end cover
- gland
- centrifugal pump
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- seal assembly
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Abstract
The utility model discloses a centrifugal pump sealing structure for conveying sewage containing solid particles, which comprises a shell and an end cover, wherein a rotating shaft is arranged on the end cover in a penetrating manner, a pump cavity is arranged in the shell, one side of the end cover, facing the pump cavity, is provided with a mechanical seal cavity which is annularly arranged along the circumferential direction of the rotating shaft, and the mechanical seal cavity is communicated with the pump cavity; a shaft sleeve penetrating through the end cover is sleeved on the rotating shaft, and a static seal assembly is arranged on the inward side of the end cover; the inward end of the shaft sleeve is provided with a fixed sleeve which is provided with a gland and a movable sealing component sleeved with a sliding sleeve, the movable sealing component is positioned between the gland and the static sealing component, and an elastic part is arranged between the gland and the movable sealing component; the edge of the press cover extends along the axial direction to form an annular lantern ring, and the lantern ring extends into the mechanical seal cavity; the outer circular surface of the lantern ring is provided with a convex rib arranged along the axial direction. The utility model has the advantages of reasonable structural design, capability of avoiding the machine seal abrasion caused by the aggregation of solid particles in sewage, contribution to prolonging the service life and the like.
Description
Technical Field
The utility model relates to the field of centrifugal pumps, in particular to a sealing structure of a centrifugal pump for conveying sewage containing solid particles.
Background
The mechanical seal is mainly used for preventing liquid medium leakage, the working principle of the mechanical seal is mainly that the dynamic and static sealing elements are kept attached and relatively slide to seal the liquid medium under the action of fluid pressure and the elastic force of a compensation mechanism, and heat is generated due to friction when the dynamic and static sealing elements of the mechanical seal are attached and relatively rotate, so that the medium or external washing water in a pump cavity is required to be cooled.
At the mining area, need use the sewage of centrifugal pump in with the mining area to take out, and lack sufficient clear water recoil again in the mining area, the sewage of generally directly using taking out carries out the recoil, because contains solid particle thing such as a large amount of silt in the sewage, in the machine seal cavity is stayed easily to solid particle in the sewage, along with the rotation of pump shaft, the wearing and tearing move, quiet sealing member, lead to the machine to seal and take place to reveal.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the technical problems to be solved by the utility model are as follows: how to provide a structural design is reasonable, can avoid the solid particle thing gathering in the sewage and cause the machine to seal wearing and tearing, is favorable to increase of service life's centrifugal pump seal structure.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a centrifugal pump sealing structure for conveying sewage containing solid particles comprises a shell, wherein an end cover is installed on one side of the shell, a rotating shaft is arranged on the end cover in a penetrating mode, and a pump cavity is formed in the shell; the end cover is provided with a washing water inlet communicated with the mechanical seal chamber; the rotating shaft is sleeved with a shaft sleeve penetrating through the end cover, and a static sealing assembly is arranged on the inward side of the end cover;
the inward end of the shaft sleeve is provided with a fixed sleeve which is provided with a gland and a movable sealing component sleeved with a sliding sleeve, the movable sealing component is positioned between the gland and the static sealing component, and an elastic part is arranged between the gland and the movable sealing component, so that the movable sealing component is axially pressed on the static sealing component; the edge of the pressure cover extends along the axial direction to form an annular lantern ring, and the lantern ring extends into the mechanical seal cavity; have along the bead of axial setting on the excircle face of the lantern ring, the bead is followed the circumference equipartition of the lantern ring is provided with a plurality ofly.
By adopting the structure, when the rotating shaft rotates, sewage is pumped out, the sewage for flushing enters the mechanical seal cavity through the flushing water inlet, the gland arranged on the shaft sleeve rotates along with the rotating shaft, the convex edge arranged along the axial direction is arranged on the outer surface of the lantern ring of the gland, the sewage in the mechanical seal cavity is stirred by the convex edge in the circumferential direction in the rotating process of the gland, the sewage is driven to rotate around the rotating shaft, the solid particles in the sewage are far away from the rotating shaft under the action of the rotating centrifugal force and flow into the pump cavity under the pressure of the flushing water, so that the solid particles are prevented from being accumulated in the mechanical seal cavity, the mechanical seal is prevented from being worn, and the service life is prolonged.
Furthermore, one end of the ring sleeve, which is far away from the gland, is contracted inwards and encircles the outer circular surface of the dynamic sealing component.
Therefore, the ring sleeve, the gland and the dynamic sealing assembly form a relatively closed space, so that solid particles in sewage are prevented from entering the area where the elastic part is located, and the work of the elastic part is prevented from being influenced.
Furthermore, the elastic part is a spiral spring sleeved on the shaft sleeve, one end of the spiral spring is abutted to the pressure cover, and the other end of the spiral spring is abutted to the dynamic sealing assembly.
Furthermore, a first notch is formed in the inner wall of the end cover, the static sealing assembly is embedded in the first notch, and a first sealing gasket is arranged between the static sealing assembly and the first notch.
Furthermore, the rotating shaft is sleeved with a connecting sleeve, one side of the shaft sleeve, which is close to the connecting sleeve, is provided with a second notch, and the connecting sleeve is plugged in the second notch.
Further, a groove is formed in the inner wall of the second notch, a third sealing gasket is arranged inside the groove, and the inner wall of the third sealing gasket is attached to the outer side of the connecting sleeve.
Furthermore, a groove is formed in one side, close to the shell, of the end cover, a fourth sealing gasket is arranged inside the groove, and one side of the fourth sealing gasket is attached to the outer side of the shell.
Furthermore, an annular third notch is formed in the inner circular surface of the dynamic sealing assembly, a second sealing gasket is arranged in the third notch, and the second sealing gasket is attached to the outer side of the shaft sleeve.
In conclusion, the utility model has the advantages of reasonable structural design, capability of avoiding the machine seal abrasion caused by the accumulation of solid particles in sewage, contribution to prolonging the service life and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sealing structure of a centrifugal pump for conveying sewage containing solid particles provided by the utility model.
Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
Fig. 3 is a schematic perspective view of the gland.
Description of the drawings: 1. a housing; 2. an end cap; 3. a pump chamber; 4. a mechanically sealed chamber; 5. a rinse water inlet; 6. a dynamic seal assembly; 7. a rotating shaft; 8. a shaft sleeve; 9. a first notch; 10. a static seal assembly; 11. a first gasket; 12. connecting sleeves; 13. a second notch; 14. a gland; 15. a collar; 17. an elastic member; 19. a third notch; 20. a second gasket; 21. a third gasket; 23. and a fourth gasket.
Detailed Description
The present invention will be described in further detail with reference to examples.
In the specific implementation: as shown in fig. 1 to 3, a centrifugal pump sealing structure for conveying sewage containing solid particles comprises a housing 1, wherein an end cover 2 is mounted on one side of the housing 1, a rotating shaft 7 is penetratingly arranged on the end cover 2, a pump cavity 3 is arranged in the housing 1, a mechanical seal chamber 4 annularly arranged along the circumferential direction of the rotating shaft 7 is arranged on one side of the end cover 2 facing the pump cavity 3, and the mechanical seal chamber 4 is communicated with the pump cavity 3; the end cover 2 is provided with a washing water inlet 5 communicated with the mechanical seal chamber 4; a shaft sleeve 8 penetrating through the end cover 2 is sleeved on the rotating shaft 7, and a static seal assembly 10 is installed on the inward side of the end cover 2;
the inward end of the shaft sleeve 8 is provided with a dynamic seal assembly 6 which is fixedly sleeved with a gland 14 and slidably sleeved, the dynamic seal assembly 6 is positioned between the gland 14 and the static seal assembly 10, and an elastic part 17 is arranged between the gland 14 and the dynamic seal assembly 6, so that the dynamic seal assembly 6 is axially pressed on the static seal assembly 10; the edge of the gland 14 extends along the axial direction to form an annular collar 15, and the collar 15 extends into the mechanical seal chamber 4; the outer circular surface of the lantern ring 15 is provided with a plurality of ribs arranged along the axial direction, and the plurality of ribs are uniformly distributed along the circumferential direction of the lantern ring 15, as shown in fig. 3.
By adopting the structure, when the rotating shaft rotates, sewage is pumped out, the sewage for flushing enters the mechanical seal cavity through the flushing water inlet, the gland arranged on the shaft sleeve rotates along with the rotating shaft, the convex edge arranged along the axial direction is arranged on the outer surface of the lantern ring of the gland, the sewage in the mechanical seal cavity is stirred by the convex edge in the circumferential direction in the rotating process of the gland, the sewage is driven to rotate around the rotating shaft, the solid particles in the sewage are far away from the rotating shaft under the action of the rotating centrifugal force and flow into the pump cavity under the pressure of the flushing water, so that the solid particles are prevented from being accumulated in the mechanical seal cavity, the mechanical seal is prevented from being worn, and the service life is prolonged.
In operation, the end of the collar 15 away from the gland 14 contracts inwardly and embraces the outer circumferential surface of the dynamic seal assembly 6.
Therefore, the ring sleeve, the gland and the dynamic sealing assembly form a relatively closed space, so that solid particles in sewage are prevented from entering the area where the elastic part is located, and the work of the elastic part is prevented from being influenced.
In implementation, the elastic member 17 is a coil spring sleeved on the shaft sleeve 8, one end of the coil spring abuts against the gland 14, and the other end of the coil spring abuts against the dynamic seal assembly 6.
During implementation, a first notch 9 is formed in the inner wall of the end cover 2, the static sealing component 10 is embedded in the first notch 9, and a first sealing gasket 11 is arranged between the static sealing component 10 and the first notch 9.
During implementation, the rotating shaft 7 is sleeved with a connecting sleeve 12, one side of the shaft sleeve 8, which is close to the connecting sleeve 12, is provided with a second notch 13, and the connecting sleeve 12 is plugged in the second notch 13.
During implementation, a groove is formed in the inner wall of the second notch 13, a third sealing gasket 21 is arranged inside the groove, and the inner wall of the third sealing gasket 21 is attached to the outer side of the connecting sleeve 12.
During implementation, a groove is formed in one side, close to the shell 1, of the end cover 2, a fourth sealing gasket 23 is arranged inside the groove, and one side of the fourth sealing gasket 23 is attached to the outer side of the shell 1.
In implementation, the inner circular surface of the dynamic seal assembly 6 is provided with an annular third notch 19, a second seal gasket 20 is arranged in the third notch 19, and the second seal gasket 20 is attached to the outer side of the shaft sleeve 8.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A centrifugal pump sealing structure for conveying sewage containing solid particles comprises a shell (1), wherein an end cover (2) is installed on one side of the shell (1), a rotating shaft (7) is arranged on the end cover (2) in a penetrating mode, a pump cavity (3) is arranged inside the shell (1), and the centrifugal pump sealing structure is characterized in that a mechanical sealing chamber (4) which is arranged in an annular mode along the circumferential direction of the rotating shaft (7) is arranged on one side, facing the pump cavity (3), of the end cover (2), and the mechanical sealing chamber (4) is communicated with the pump cavity (3); the end cover (2) is provided with a washing water inlet (5) communicated with the mechanical seal chamber (4); a shaft sleeve (8) penetrating through the end cover (2) is sleeved on the rotating shaft (7), and a static seal assembly (10) is installed on the inward side of the end cover (2);
the inward end of the shaft sleeve (8) is provided with a dynamic seal assembly (6) which is fixedly sleeved with a gland (14) and sleeved in a sliding manner, the dynamic seal assembly (6) is positioned between the gland (14) and the static seal assembly (10), and an elastic part (17) is arranged between the gland (14) and the dynamic seal assembly (6) to enable the dynamic seal assembly (6) to be axially pressed on the static seal assembly (10); the edge of the gland (14) extends along the axial direction to form an annular collar (15), and the collar (15) extends into the mechanical seal chamber (4); the excircle face of the lantern ring (15) is provided with a plurality of ribs arranged along the axial direction, and the circumferential uniform distribution of the lantern ring (15) along the ribs is provided with a plurality of ribs.
2. The centrifugal pump sealing structure for conveying solid particle-containing sewage as claimed in claim 1, wherein the end of said collar (15) away from said gland (14) is inwardly contracted and embraces the outer circumferential surface of said dynamic seal assembly (6).
3. The centrifugal pump sealing structure for conveying solid particle-containing sewage as claimed in claim 2, wherein said elastic member (17) is a coil spring fitted over said shaft sleeve (8), one end of said coil spring abuts against said gland (14) and the other end abuts against said dynamic seal assembly (6).
4. The centrifugal pump sealing structure for conveying solid particle-containing sewage as claimed in claim 1, wherein the inner wall of the end cover (2) is provided with a first notch (9), the static sealing component (10) is embedded in the first notch (9), and a first sealing gasket (11) is arranged between the static sealing component (10) and the first notch (9).
5. The centrifugal pump sealing structure for conveying sewage containing solid particles as claimed in claim 1, wherein a connecting sleeve (12) is sleeved on the rotating shaft (7), a second notch (13) is formed in one side, close to the connecting sleeve (12), of the shaft sleeve (8), and the connecting sleeve (12) is plugged in the second notch (13).
6. The centrifugal pump sealing structure for conveying sewage containing solid particles as claimed in claim 5, wherein the inner wall of the second notch (13) is provided with a groove, a third sealing gasket (21) is arranged inside the groove, and the inner wall of the third sealing gasket (21) is attached to the outer side of the connecting sleeve (12).
7. The centrifugal pump sealing structure for conveying solid particle-containing sewage as claimed in claim 1, 4 or 5, wherein one side of the end cover (2) close to the casing (1) is provided with a groove, and a fourth sealing gasket (23) is arranged in the groove, and one side of the fourth sealing gasket (23) is attached to the outer side of the casing (1).
8. The centrifugal pump sealing structure for conveying solid particle-containing sewage as claimed in claim 1, wherein said dynamic seal assembly (6) has an annular third notch (19) on the inner circumferential surface, a second seal (20) is arranged in said third notch (19), and said second seal (20) is attached to the outer side of the shaft sleeve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122071745.5U CN215672845U (en) | 2021-08-31 | 2021-08-31 | Centrifugal pump sealing structure for conveying sewage containing solid particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122071745.5U CN215672845U (en) | 2021-08-31 | 2021-08-31 | Centrifugal pump sealing structure for conveying sewage containing solid particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215672845U true CN215672845U (en) | 2022-01-28 |
Family
ID=79957536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122071745.5U Active CN215672845U (en) | 2021-08-31 | 2021-08-31 | Centrifugal pump sealing structure for conveying sewage containing solid particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215672845U (en) |
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2021
- 2021-08-31 CN CN202122071745.5U patent/CN215672845U/en active Active
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