CN212563687U - Combined sealing structure of sewage submersible electric pump - Google Patents
Combined sealing structure of sewage submersible electric pump Download PDFInfo
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- CN212563687U CN212563687U CN202021260048.3U CN202021260048U CN212563687U CN 212563687 U CN212563687 U CN 212563687U CN 202021260048 U CN202021260048 U CN 202021260048U CN 212563687 U CN212563687 U CN 212563687U
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Abstract
The utility model belongs to the technical field of submerged motor pump, refer in particular to a sewage filth submerged motor pump combined seal structure, include from last motor, grease chamber end cover, the pump body that connects gradually extremely down, in grease chamber and grease chamber end cover were passed in the pivot of motor stretched into the pump body, the cover was equipped with the impeller in the pivot in the pump body, form the seal chamber between grease chamber and the grease chamber end cover, the cover is equipped with double-ended face mechanical seal in the pivot of seal chamber, the cover is equipped with the skeleton oil blanket in the pivot of grease chamber end cover lower extreme, the cover is equipped with in the pivot between skeleton oil blanket and the impeller. The utility model discloses sealing performance is good, mechanical seal long service life, submerged motor pump long service life.
Description
The technical field is as follows:
the utility model belongs to the technical field of submerged motor pump, refer in particular to a sewage filth submerged motor pump combination formula seal structure.
Background art:
the submersible motor of the existing submersible electric pump for sewage and sewage is sealed by a static seal and a dynamic seal, wherein the static seal refers to the seal between two static surfaces, and a rubber pad or a rubber O-shaped sealing ring is usually adopted to ensure the seal between the inner cavity of the submersible motor and the outside when the submersible motor is submerged; the dynamic seal of the impeller is generally directly sealed by a single end face or sealed by double end faces at the rear end of the impeller. The high-pressure water in the pump cavity is in direct contact with the moving ring in the mechanical seal cavity, so that the electric pump runs for a long time, sealing failure is easily caused, and meanwhile, silt in the water is also in direct contact with the mechanical seal friction pair, so that the abrasion of the mechanical seal friction pair is accelerated, the sealing failure is also easily caused, and the service life of the submersible electric pump is shortened.
The invention content is as follows:
the utility model aims at providing a sewage filth submerged motor pump combination formula seal structure, its sealing performance is good, mechanical seal long service life, submerged motor pump long service life.
The utility model discloses a realize like this:
the utility model provides a sewage filth submerged motor pump combination formula seal structure, includes from last motor, grease chamber end cover, the pump body that connects gradually extremely down, and in the pivot of motor passed grease chamber and grease chamber end cover stretched into the pump body, the cover was equipped with the impeller in the pivot in the pump body, form sealed chamber between grease chamber and the grease chamber end cover, the cover is equipped with double end face mechanical seal in the pivot of sealed intracavity, the cover is equipped with the skeleton oil blanket in the pivot of grease chamber end cover lower extreme, the cover is equipped with in the pivot between skeleton oil blanket and the impeller and gets rid of husk.
In foretell sewage filth submerged motor pump combination formula seal structure, two terminal surface mechanical seal include the quiet ring of up end mechanical seal, up end mechanical seal rotating ring, lower terminal surface mechanical seal rotating ring and the quiet ring of lower terminal surface mechanical seal, be equipped with the up end mechanical seal seat of the quiet ring of installation up end mechanical seal on the grease chamber, the end cover upper end of grease chamber is equipped with the lower terminal surface mechanical seal seat of the quiet ring of installation down terminal surface mechanical seal.
In the combined sealing structure of the sewage and sewage submersible electric pump, the lower end of the oil chamber end cover is provided with the framework oil seal seat for installing the framework oil seal, the lower end of the framework oil seal seat is provided with the oil seal cover plate, and the rotating shaft penetrates through the oil seal cover plate and is sleeved with the sand slinger.
In the combined sealing structure of the sewage submersible electric pump, the oil seal cover plate is fixed on the lower end face of the framework oil seal seat through screws.
In the combined sealing structure of the sewage and sewage submersible electric pump, the sand slinger comprises a sand slinger shaft sealing ring sleeved outside the oil chamber end cover and a sand slinger plane connected to the lower end of the sand slinger shaft sealing ring, and the rotating shaft penetrates through the sand slinger plane and is sleeved with an impeller.
In the combined sealing structure of the sewage and sewage submersible electric pump, a gap M1 between the upper end surface of the sand slinger shaft sealing ring and the lower end surface of the oil chamber end cover is 2mm-2.5mm, a gap M2 between the inner side surface of the sand slinger shaft sealing ring and the outer side surface of the framework oil seal seat is 2mm-2.5mm, and a gap M3 between the upper end surface of the sand slinger plane and the lower end surface of the oil seal cover plate is 2mm-3 mm.
In the combined sealing structure of the sewage and dirt submersible electric pump, the axial length H of the sand slinger shaft sealing ring sleeved outside the framework oil seal seat is 5-8 mm.
In the combined sealing structure of the sewage and dirt submersible electric pump, the sealing cavity is filled with mechanical oil for cooling and lubricating the double-end-face mechanical seal.
In the combined sealing structure of the sewage and sewage submersible electric pump, the oil injection threaded hole is formed in the side surface of the oil chamber.
In the combined sealing structure of the sewage and sewage submersible electric pump, the lower end of the oil chamber, the end cover of the oil chamber and the upper end of the pump body are fixedly connected through bolts.
Compared with the prior art, the utility model outstanding advantage is:
1. the utility model is provided with double mechanical seals, which effectively prevents liquid from entering the motor; the framework oil seal is arranged below the double-end-face mechanical seal, so that water quality and solid particles are reduced to directly enter the double-end-face mechanical seal, the abrasion of the double-end-face mechanical seal is reduced, and the service life of the double-end-face mechanical seal is prolonged; the framework oil seal is sleeved with the sand slinger, so that the water pressure entering the framework oil seal is reduced, solid particles in a liquid medium are reduced to enter the framework oil seal, the abrasion of the framework oil seal is reduced, and the service life of the framework oil seal is prolonged;
2. the combined sealing structure of the utility model has good sealing effect through double mechanical sealing and framework oil seal, improves the sealing reliability between the motor and the pump body of the submersible electric pump, and prolongs the service life of the submersible electric pump;
3. the utility model discloses a skeleton oil blanket seat lower end cover is equipped with the oil blanket apron, and the oil blanket apron can avoid the uncovered outside of whole oil blanket face of skeleton oil blanket, has improved the sealed effect of skeleton oil blanket.
Description of the drawings:
FIG. 1 is a sectional view of the submersible pump according to the present invention;
fig. 2 is a structural sectional view of the sealing structure of the submersible electric pump of the present invention;
fig. 3 is a structural sectional view of the oil chamber of the present invention;
fig. 4 is a structural sectional view of an oil chamber end cover of the present invention;
fig. 5 is a structural sectional view of the sand slinger of the present invention.
Reference numerals: 1. a motor; 2. an oil chamber; 2a, sealing the cavity; 2b, an upper end surface mechanical seal seat; 2c, injecting oil into the threaded hole; 3. an oil chamber end cover; 3a, a lower end surface mechanical seal seat; 3b, a framework oil seal seat; 4. a pump body; 5. a rotating shaft; 6. an impeller; 7. double end face mechanical sealing; 7a, mechanically sealing the static ring at the upper end face; 7b, mechanically sealing the movable ring at the upper end face; 7c, mechanically sealing the movable ring at the lower end surface; 7d, mechanically sealing the static ring at the lower end surface; 8. framework oil seal; 9. a sand slinger; 9a, a sand slinger shaft sealing ring; 9b, a sand slinger plane; 10. and (7) oil seal cover plates.
The specific implementation mode is as follows:
the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 5:
the utility model provides a sewage filth submerged motor pump combination formula seal structure, includes from last motor 1, grease chamber 2, grease chamber end cover 3, the pump body 4 that connects gradually extremely down, and motor 1's pivot 5 passes in grease chamber 2 and grease chamber end cover 3 stretch into the pump body 4, and the cover is equipped with impeller 6 on the pivot 5 in the pump body 4, form seal chamber 2a between grease chamber 2 and the grease chamber end cover 3, the cover is equipped with two terminal surface mechanical seal 7 on the pivot 5 in seal chamber 2a, two terminal surface mechanical seal 7 are used for seal grease chamber 2 and pivot 5, grease chamber end cover 3 and the pivot 5 between the clearance, the cover is equipped with skeleton oil blanket 8 on the pivot 5 of grease chamber end cover 3 lower extreme, skeleton oil blanket 8 is used for the clearance between grease chamber end cover 3 and the pivot 5, the cover is equipped with and is got rid of husky ware 9 on the.
The utility model discloses a combination formula seal structure's sealed principle: the sand slinger 9 rotates along with the rotation of the rotating shaft 5, when the sand slinger 9 rotates, liquid around the sand slinger can also rotate together, the rotating liquid can generate an outward centrifugal force, and the centrifugal force balances the pressure flowing to the framework oil seal 8, reduces the pressure entering the framework oil seal 8 and improves the sealing effect of the framework oil seal 8; on the other hand, solid particles in a liquid medium are prevented from entering the framework oil seal 8, the abrasion of the framework oil seal 8 is reduced, the service life of the framework oil seal 8 is prolonged, and particularly, when sewage is conveyed, the sand content in the sewage is serious. A framework oil seal 8 is added at the front end of the double-end-face mechanical seal 7, water quality and solid particles are reduced through the framework oil seal 8, the solid particles directly enter the double-end-face mechanical seal 7, and the sealing effect of the double-end-face mechanical seal 7 is improved. The lower end face mechanical seal of the double-end face mechanical seal 7 is mainly used for sealing a gap between the oil chamber end cover 3 and the rotating shaft 5 and preventing liquid in the inner cavity of the pump body 4 from entering the seal cavity 2 a; the upper end face mechanical seal of the double-end face mechanical seal 7 is mainly used for sealing a gap between the oil chamber 2 and the rotating shaft 5 and preventing liquid in the sealing cavity 2a from entering the inner cavity of the motor 1.
As shown in fig. 2-4, the structure and mounting structure of the double mechanical seal 7: the double-end-face mechanical seal 7 comprises an upper-end-face mechanical seal static ring 7a, an upper-end-face mechanical seal moving ring 7b, a lower-end-face mechanical seal moving ring 7c and a lower-end-face mechanical seal static ring 7d, an upper-end-face mechanical seal seat 2b for installing the upper-end-face mechanical seal static ring 7a is arranged on the oil chamber 2, and a lower-end-face mechanical seal seat 3a for installing the lower-end-face mechanical seal static ring 7d is arranged at the upper end of the oil chamber end cover 3. The upper end face mechanical seal stationary ring 7a and the upper end face mechanical seal moving ring 7b form an upper end face mechanical seal, and the lower end face mechanical seal moving ring 7c and the lower end face mechanical seal stationary ring 7d form a lower end face mechanical seal.
As shown in fig. 2 and 4, the mounting structure of the framework oil seal 8: the lower end of the oil chamber end cover 3 is provided with a framework oil seal seat 3b for mounting a framework oil seal 8, the lower end cover of the framework oil seal seat 3b is provided with an oil seal cover plate 10, and the rotating shaft 5 penetrates through the oil seal cover plate 10 and is sleeved with a sand slinger 9. The whole oil cover of the framework oil seal 8 can be prevented from being exposed through the oil seal cover plate 10, and the sealing effect of the framework oil seal 8 is improved.
As shown in fig. 2, the mounting structure of the oil seal cover plate 10: the oil seal cover plate 10 is fixed on the lower end face of the framework oil seal seat 3b through screws.
As shown in fig. 2 and 5, the structure of the sand slinger 9 is as follows: the sand slinger 9 comprises a sand slinger shaft sealing ring 9a sleeved outside the oil chamber end cover 3 and a sand slinger plane 9b connected to the lower end of the sand slinger shaft sealing ring 9a, and the rotating shaft 5 penetrates through the sand slinger plane 9b and is sleeved with the impeller 6.
Furthermore, a gap M1 between the upper end face of the sand slinger shaft sealing ring 9a and the lower end face of the oil chamber end cover 3 is 2mm-2.5mm, a gap M2 between the inner side face of the sand slinger shaft sealing ring 9a and the outer side face of the framework oil seal seat 3b is 2mm-2.5mm, and a gap M3 between the upper end face of the sand slinger plane 9b and the lower end face of the oil seal cover plate 10 is 2mm-3 mm.
In order to achieve the effect of preventing solid particles in a liquid medium from entering the framework oil seal 8 and reducing the water pressure of the framework oil seal 8, the sand slinger shaft seal ring 9a is sleeved outside the framework oil seal seat 3b, and the axial length H is 5-8 mm.
Preferably, the sealing cavity 2a is filled with mechanical oil for cooling and lubricating the double-end mechanical seal 7. The utility model discloses the during operation, the lubricated double mechanical seal of mechanical oil cooling 7 reduces the wearing and tearing of 7 rotating rings of double mechanical seal and quiet ring, prolongs 7 life of double mechanical seal.
Furthermore, the side surface of the oil chamber 2 is provided with an oiling threaded hole 2 c. The machine oil is injected into the seal cavity 2a from the oil injection threaded hole 2 c.
Preferably, the lower end of the oil chamber 2, the oil chamber end cover 3 and the upper end of the pump body 4 are fixedly connected through bolts.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.
Claims (10)
1. The utility model provides a sewage filth submerged motor pump combination formula seal structure, includes from last motor (1), grease chamber (2), grease chamber end cover (3), the pump body (4) that connects gradually extremely down, and in grease chamber (2) and grease chamber end cover (3) were passed in pivot (5) of motor (1) stretched into pump body (4), the cover was equipped with impeller (6), its characterized in that on pivot (5) in the pump body (4): form sealed chamber (2a) between grease chamber (2) and grease chamber end cover (3), the cover is equipped with two terminal surface mechanical seal (7) on pivot (5) in sealed chamber (2a), the cover is equipped with skeleton oil blanket (8) on pivot (5) of grease chamber end cover (3) lower extreme, the cover is equipped with and gets rid of husky ware (9) in pivot (5) between skeleton oil blanket (8) and impeller (6).
2. The combined seal structure of a sewage submersible electric pump according to claim 1, characterized in that: double mechanical seal (7) include up end mechanical seal quiet ring (7a), up end mechanical seal rotating ring (7b), lower terminal surface mechanical seal rotating ring (7c) and lower terminal surface mechanical seal quiet ring (7d), be equipped with up end mechanical seal seat (2b) of installation up end mechanical seal quiet ring (7a) on grease chamber (2), grease chamber end cover (3) upper end is equipped with lower terminal surface mechanical seal seat (3a) of installation lower terminal surface mechanical seal quiet ring (7 d).
3. The combined seal structure of a sewage submersible electric pump according to claim 1, characterized in that: the lower end of the oil chamber end cover (3) is provided with a framework oil seal seat (3b) for installing a framework oil seal (8), the lower end cover of the framework oil seal seat (3b) is provided with an oil seal cover plate (10), and the rotating shaft (5) penetrates through the oil seal cover plate (10) and is sleeved with a sand throwing device (9).
4. The combined seal structure of a sewage submersible electric pump according to claim 3, characterized in that: the oil seal cover plate (10) is fixed on the lower end face of the framework oil seal seat (3b) through screws.
5. The combined seal structure of a sewage submersible electric pump according to claim 3, characterized in that: the sand slinger (9) comprises a sand slinger shaft sealing ring (9a) sleeved outside the oil chamber end cover (3) and a sand slinger plane (9b) connected to the lower end of the sand slinger shaft sealing ring (9a), and the rotating shaft (5) penetrates through the sand slinger plane (9b) and is sleeved with the impeller (6).
6. The combined seal structure of a sewage submersible electric pump according to claim 5, characterized in that: the clearance between the upper end face of the sand slinger shaft sealing ring (9a) and the lower end face of the oil chamber end cover (3) is 2-2.5 mm, the clearance between the inner side face of the sand slinger shaft sealing ring (9a) and the outer side face of the framework oil seal seat (3b) is 2-2.5 mm, and the clearance between the upper end face of the sand slinger plane (9b) and the lower end face of the oil seal cover plate (10) is 2-3 mm.
7. The combined seal structure of a sewage submersible electric pump according to claim 5, characterized in that: the axial length of the sand slinger shaft sealing ring (9a) sleeved outside the framework oil seal seat (3b) is 5-8 mm.
8. The combined seal structure of a sewage submersible electric pump according to claim 1, characterized in that: and mechanical oil for cooling and lubricating double-end-face mechanical seal (7) is injected into the seal cavity (2 a).
9. The combined seal structure of a sewage submersible electric pump according to claim 1, characterized in that: and an oil injection threaded hole (2c) is formed in the side surface of the oil chamber (2).
10. The combined seal structure of a sewage submersible electric pump according to claim 1, characterized in that: the lower end of the oil chamber (2), the oil chamber end cover (3) and the upper end of the pump body (4) are fixedly connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021260048.3U CN212563687U (en) | 2020-06-30 | 2020-06-30 | Combined sealing structure of sewage submersible electric pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021260048.3U CN212563687U (en) | 2020-06-30 | 2020-06-30 | Combined sealing structure of sewage submersible electric pump |
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| Publication Number | Publication Date |
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| CN212563687U true CN212563687U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021260048.3U Active CN212563687U (en) | 2020-06-30 | 2020-06-30 | Combined sealing structure of sewage submersible electric pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250973A (en) * | 2021-05-26 | 2021-08-13 | 苏州美达斯机电有限公司 | Submersible pump with good sealing performance |
| CN114320993A (en) * | 2022-01-06 | 2022-04-12 | 杭州鹤见南方泵业有限公司 | Mechanical seal protection structure of water pump |
| CN117365967A (en) * | 2023-11-07 | 2024-01-09 | 保定强跃机电设备有限公司 | Submersible sewage pump oil chamber structure and leakage prevention method thereof |
-
2020
- 2020-06-30 CN CN202021260048.3U patent/CN212563687U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250973A (en) * | 2021-05-26 | 2021-08-13 | 苏州美达斯机电有限公司 | Submersible pump with good sealing performance |
| CN114320993A (en) * | 2022-01-06 | 2022-04-12 | 杭州鹤见南方泵业有限公司 | Mechanical seal protection structure of water pump |
| CN117365967A (en) * | 2023-11-07 | 2024-01-09 | 保定强跃机电设备有限公司 | Submersible sewage pump oil chamber structure and leakage prevention method thereof |
| CN117365967B (en) * | 2023-11-07 | 2024-05-28 | 保定强跃机电设备有限公司 | Submersible sewage pump oil chamber structure and leakage prevention method thereof |
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Denomination of utility model: A Combined Sealing Structure for Submersible Electric Pump for Sewage and Sewage Effective date of registration: 20230414 Granted publication date: 20210219 Pledgee: Zhejiang Wenling Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG QINGXIAO TECHNOLOGY CO.,LTD. Registration number: Y2023980038017 |