CN211059060U - Novel dry type submersible pump shaft sealing structure - Google Patents
Novel dry type submersible pump shaft sealing structure Download PDFInfo
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- CN211059060U CN211059060U CN201922104388.0U CN201922104388U CN211059060U CN 211059060 U CN211059060 U CN 211059060U CN 201922104388 U CN201922104388 U CN 201922104388U CN 211059060 U CN211059060 U CN 211059060U
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Abstract
The utility model relates to a immersible pump sealing member field provides a novel dry-type immersible pump shaft seal structure, include: mechanical seals, three-lip seals, and glycerin seals; the mechanical seal sleeve is arranged on a submersible pump shaft, a three-lip seal is arranged on one side of the mechanical seal, the three-lip seal is also sleeved on the submersible pump shaft, and the three-lip seal is close to a submersible pump impeller; and glycerin is injected into a space formed between the mechanical seal, the three-lip seal and the submersible pump cover to form glycerin seal. And a mechanical seal shaft sleeve is also arranged between the mechanical seal and the submersible pump shaft. And the outer side of the three-lip seal is provided with a ring plate, and the ring plate is sleeved on the shaft of the submersible pump and is fixed on the submersible pump cover. The utility model discloses a triple seal structure of mechanical seal and three lip seals and the sealed grease chamber between them (filling glycerine and sealing), makes dry-type immersible pump reach good axle seal effect, replaces wet-type immersible pump, realizes diving operation.
Description
Technical Field
The utility model relates to a immersible pump sealing member field especially relates to a novel dry-type immersible pump shaft seal structure.
Background
The sealing of the motor of the submersible pump is a core technology for ensuring the long-term safe operation of the submersible pump under water. At present, the reliability of the dry motor shaft seal of the coaxial submersible pump is of great importance. The development of a high-reliability shaft sealing method is a key part of a dry type submersible electric pump, and the technical problem is well solved by the invention.
The deep-submersible electric pump is usually driven by a multi-stage wet motor, has complex structure, large volume and weight and difficult maintenance, and restricts the application occasions, particularly the application under the conditions of emergency, rapid movement and narrow space. The dry type submersible pump has the advantages of small volume, convenient maintenance, reliable operation and the like, but the sealing effect of the prior dry type submersible pump cannot meet the requirement. Therefore, it is urgently required to develop a shaft sealing structure of a dry type submersible pump with high reliability.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is complicated, volume and weight are big mainly to solve prior art's dark immersible pump structure, maintains technical problem such as difficulty, provides a novel dry-type dive pump shaft seal structure, adopts the triple seal structure of mechanical seal and three lip seals and the sealed grease chamber between them (filling glycerine seal), makes the dry-type immersible pump reach good axle seal effect, replaces dark immersible pump, can realize diving operation.
The utility model provides a novel dry-type immersible pump shaft seal structure, include: mechanical seal 3, three-lip seal 9, and glycerin seal 8;
the mechanical seal 3 is sleeved on the submersible pump shaft 2, a three-lip seal 9 is arranged on one side of the mechanical seal 3, the three-lip seal 9 is also sleeved on the submersible pump shaft 2, and the three-lip seal 9 is close to the submersible pump impeller 12;
and glycerin is injected into a space formed between the mechanical seal 3, the three-lip seal 9 and the submersible pump cover 10 to form a glycerin seal 8.
Preferably, a mechanical seal shaft sleeve 1 is further arranged between the mechanical seal 3 and the submersible pump shaft 2.
Preferably, the outer side of the three-lip seal 9 is provided with a ring plate 11, and the ring plate 11 is sleeved on the submersible pump shaft 2 and fixed on the submersible pump cover 10.
The utility model provides a novel dry-type immersible pump shaft seal structure can be applied to coaxial dry-type motor driven centrifugal pump, can solve the not enough of ordinary dark immersible pump, satisfies the requirement of dive depth, small and light in weight, and its characteristics are closely combined pump and motor into an organic whole, constitute the coaxial structure of dive operation unit jointly, adopt triple seal structure, when the immersible pump dives into aquatic work, the triple seal blocks the water at first and gets into mechanical seal room along the axle; the glycerol in the sealing chamber can play a role in balancing pressure at the pump end and blocking water from entering, and even if trace water permeates into the sealing chamber along the shaft and contacts with the end face of the glycerol, the glycerol can be quickly emulsified under the action of the high-speed rotating shaft, so that the glycerol can be effectively blocked from further permeating to ensure that no water enters the inner cavity of the motor; the mechanical seal is used for strengthening protection, and the safety and reliability are improved. The embodiment adopts a triple sealing structure, the sealing structure is reasonable, the installation process is simple, the maintenance is convenient, and the submersible pump can be used more reliably and safely.
Drawings
Fig. 1 is the structural schematic diagram of the novel dry type submersible pump shaft sealing structure provided by the utility model.
Reference numerals: 1. a mechanical seal shaft sleeve; 2. a submersible pump shaft; 3. mechanical sealing; 4. floating and installing an end cover; 5. An O-shaped ring; 6. a bolt; 7. a nut; 8. sealing with glycerol; 9. sealing with three lips; 10. a submersible pump cover; 11. A ring plate; 12. an impeller of a submersible pump.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.
Fig. 1 is the structural schematic diagram of the novel dry type submersible pump shaft sealing structure provided by the utility model. As shown in fig. 1, the embodiment of the utility model provides a novel dry-type immersible pump shaft seal structure, include: mechanical seal 3, three-lip seal 9, and glycerin seal 8.
The mechanical seal 3 is sleeved on the submersible pump shaft 2. And a mechanical seal shaft sleeve 1 is also arranged between the mechanical seal 3 and the submersible pump shaft 2. One side of mechanical seal 3 sets up three lip seal 9, three lip seal 9 also overlaps and establish on submersible pump shaft 2, three lip seal 9 is close to immersible pump impeller 12.
And glycerin is injected into a space formed between the mechanical seal 3, the three-lip seal 9 and the submersible pump cover 10 to form a glycerin seal 8. And the outer side of the three-lip seal 9 is provided with a ring plate 11, and the ring plate 11 is sleeved on the submersible pump shaft 2 and is fixed on the submersible pump cover 10. The ring plate 11 is able to block the three-lip seal 9.
In addition, a floating end cover 4 is arranged above the mechanical seal 3, the floating end cover 4 is fixed on a submersible pump cover 10 through a bolt 6 and a nut 7, and an O-shaped ring 5 is arranged between the submersible pump cover 10 and the floating end cover 4.
When the novel dry type submersible pump shaft sealing structure is assembled, a mechanical sealing shaft sleeve 1 is arranged on a submersible pump shaft 2, a mechanical seal 3 is arranged, then an upper floating end cover 4 and a submersible pump cover 10 are arranged, and the sealing structure is combined by a bolt 6 and a nut 7; after glycerin is injected into the space formed between the mechanical seal 3 and the three-lip seal 9, a glycerin seal 8 is formed; a three-lip seal 9 is embedded in the mechanical seal shaft sleeve 1 and is blocked by a ring plate 11; finally, the impeller 12 of the submersible pump is installed and locked.
When the novel dry submersible pump shaft sealing structure works, water entering from the rear end of the impeller 12 of the submersible pump at the inlet of the submersible pump is firstly blocked by the three-lip seal 9, and the glycerin injected into the space formed between the mechanical seal 3 and the three-lip seal 9 is not easy to compress, so that the water is not easy to leak along the contact surface of the submersible pump shaft 2 and the three-lip seal 9; even if a small amount of water enters the glycerin seal 8, the water is directly isolated by the glycerin seal 8 or forms an emulsion with the glycerin, and the glycerin or the emulsion is sealed by the mechanical seal 3, so that a good sealing effect is achieved through the structure.
According to the novel dry submersible pump shaft sealing structure provided by the embodiment, the sealing structure is designed to adopt the mixed type sealing with different structural types of the two end faces of the mechanical seal 3 and the three-lip seal 9, so that the pressure of the medium in the sealing chamber (the space formed between the mechanical seal 3, the three-lip seal 9 and the submersible pump cover 10) can be applied to the end faces, the medium in the sealing chamber and the outdoor water are kept in a pressure balance state, and the blocking medium is combined with the water. When the submersible pump is submerged to work, the three-lip seal 9 firstly prevents water from entering the mechanical seal chamber along the shaft; the glycerol in the sealing chamber can play a role in balancing pressure at the pump end and blocking water from entering, and even if trace water permeates into the sealing chamber along the shaft and contacts with the end face of the glycerol, the glycerol can be quickly emulsified under the action of the high-speed rotating shaft, so that the glycerol can be effectively blocked from further permeating to ensure that no water enters the inner cavity of the motor; the mechanical seal 3 is used for strengthening protection and improving safety and reliability. The embodiment adopts the triple sealing structure, so that the submersible pump can be used more reliably and safely.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, without substantially departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The utility model provides a novel dry-type immersible pump shaft seal structure which characterized in that includes: a mechanical seal (3), a three-lip seal (9) and a glycerin seal (8);
the mechanical seal (3) is sleeved on the submersible pump shaft (2), a three-lip seal (9) is arranged on one side of the mechanical seal (3), the three-lip seal (9) is also sleeved on the submersible pump shaft (2), and the three-lip seal (9) is close to the submersible pump impeller (12);
and glycerin seal (8) is formed after glycerin is injected into a space formed between the mechanical seal (3), the three-lip seal (9) and the submersible pump cover (10).
2. The novel dry type submersible pump shaft sealing structure according to claim 1, characterized in that a mechanical sealing shaft sleeve (1) is further arranged between the mechanical seal (3) and the submersible pump shaft (2).
3. A novel dry type submersible pump shaft sealing structure according to claim 1 or 2, characterized in that an annular plate (11) is arranged outside the three-lip seal (9), and the annular plate (11) is sleeved on the submersible pump shaft (2) and fixed on the submersible pump cover (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104388.0U CN211059060U (en) | 2019-11-29 | 2019-11-29 | Novel dry type submersible pump shaft sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104388.0U CN211059060U (en) | 2019-11-29 | 2019-11-29 | Novel dry type submersible pump shaft sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211059060U true CN211059060U (en) | 2020-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922104388.0U Active CN211059060U (en) | 2019-11-29 | 2019-11-29 | Novel dry type submersible pump shaft sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211059060U (en) |
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2019
- 2019-11-29 CN CN201922104388.0U patent/CN211059060U/en active Active
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