CN213392830U - Combined type auxiliary impeller sealing device - Google Patents
Combined type auxiliary impeller sealing device Download PDFInfo
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- CN213392830U CN213392830U CN202022045579.7U CN202022045579U CN213392830U CN 213392830 U CN213392830 U CN 213392830U CN 202022045579 U CN202022045579 U CN 202022045579U CN 213392830 U CN213392830 U CN 213392830U
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- auxiliary impeller
- box body
- packing
- packing seat
- pump
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Abstract
The utility model discloses a combined type auxiliary impeller sealing device, which is characterized in that the upper part of an auxiliary impeller is provided with a packing seat, the packing seat is arranged in a step shape, the inner cavity of the packing seat is provided with packing, a packing gland is arranged above the packing seat in a matching way, and the packing gland and the packing seat are connected and fixed through fastening screws; a sealing box body is arranged at the lower part of the auxiliary impeller, and an adjusting gasket for adjusting the distance between the blades of the auxiliary impeller and the bottom plane of the packing seat is arranged between the sealing box body and the packing seat; a shaft sleeve is arranged below the auxiliary impeller, and a sliding bearing is arranged between the shaft sleeve and the sealing box body in a matching manner; the sealed box body is connected and fixed with the discharge section of the pump. The device has the advantages of simple structure, good stability, safety, reliability, convenient maintenance, low maintenance cost, time saving and labor saving; the use cost is reduced, the use performance is improved, large granular substances can be effectively prevented from entering the sealing box body, the stability of pump operation is improved, and the pump is suitable for conveying media containing solid particles.
Description
Technical Field
The utility model relates to a field of pump especially relates to a modular auxiliary impeller sealing device.
Background
When the pump works, the auxiliary impeller rotates along with the main shaft of the pump, and the rotating liquid can generate an outward centrifugal force to ensure that the pump can stably run for a long time; the auxiliary impeller in the prior art has poor sealing performance, the end surface clearance of the auxiliary impeller blade cannot be adjusted, and when a fault occurs in the use process, the maintenance and the replacement are difficult, the replacement of accessories wastes time and labor, and the maintenance cost is high; frequent replacement of parts also results in reduced pump operating efficiency; it is therefore desirable to design a seal for the expeller.
Disclosure of Invention
The utility model aims at providing a combined type auxiliary impeller sealing device which has simple structure, good stability, safety, reliability, convenient maintenance and low cost; the use cost is reduced, and the use performance is improved; the technical problem is solved.
In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: a combined type auxiliary impeller sealing device comprises an auxiliary impeller arranged on a pump shaft, wherein an O-shaped sealing ring is arranged between the auxiliary impeller and the pump shaft, and the upper end of the auxiliary impeller is provided with a retaining ring for a shaft; the upper part of the auxiliary impeller is provided with a packing seat, the packing seat is arranged in a stepped manner, packing is arranged in the inner cavity of the packing seat, a packing gland is arranged above the packing seat in a matched manner, and the packing gland and the packing seat are connected and fixed through fastening screws; a sealing box body is arranged at the lower part of the auxiliary impeller, and an adjusting gasket for adjusting the distance between the blades of the auxiliary impeller and the bottom plane of the packing seat is arranged between the sealing box body and the packing seat; a shaft sleeve is arranged below the auxiliary impeller, and a sliding bearing is arranged between the shaft sleeve and the sealing box body in a matching manner; the sealed box body is connected and fixed with the discharge section of the pump.
Preferably: a radial clearance is arranged between the sliding bearing and the shaft sleeve, and a plurality of annular decompression grooves are arranged on the inner surface of the sliding bearing.
Preferably: the sealed box body is provided with an exhaust pipe, one end of the exhaust pipe is communicated with the inside of the sealed box body, and the other end of the exhaust pipe is communicated with the suction pool.
Preferably: the position of the sealing box body corresponding to the blade of the auxiliary impeller is provided with a plug hole, and a plug screw is arranged in the plug hole.
Preferably: and a sealing gasket is arranged between the sealing box body and the discharge section of the pump.
The utility model has the advantages that; a combined expeller seal, compared with the traditional structure: the packing seal is arranged above the auxiliary impeller, the sealing effect is good, and the leakage of high-pressure liquid can be effectively prevented; a shaft check ring is arranged at the top end of the auxiliary impeller to position the auxiliary impeller; the shaft sleeve and the sealing box body are arranged below the auxiliary impeller, the sliding bearing is arranged in the sealing box body, and the sliding bearing is arranged at the shaft seal position of the discharge section of the pump to play a supporting role; the utility model has simple structure, good stability, safety, reliability, convenient maintenance, low maintenance cost, time saving and labor saving; the use cost is reduced, the use performance is improved, large granular substances can be effectively prevented from entering the sealing box body, the stability and the working efficiency of the operation of the pump are improved, and the pump is suitable for conveying media containing solid particles.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a pump shaft; 2. a discharge section; 3. an upper shaft sleeve; 4. a sliding bearing; 5. an exhaust pipe; 6. sealing gaskets; 7. sealing the box body; 8. a plug screw; 9. a secondary impeller; 10. a filler seat; 11. a packing gland; 12. a pressure reducing tank; 13. a retainer ring for a shaft; an O-ring; 15. a filler; 16. and adjusting the gasket.
Detailed Description
In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments;
in the attached fig. 1: a combined type auxiliary impeller sealing device comprises an auxiliary impeller 9 arranged on a pump shaft 1, wherein an O-shaped sealing ring 14 is arranged between the auxiliary impeller 9 and the pump shaft 1, so that a medium is effectively prevented from leaking outwards along the outer circle of the pump shaft; the upper end of the auxiliary impeller 9 is provided with a shaft retainer ring 13; the upper part of the auxiliary impeller 9 is provided with a packing seat 10, the packing seat 10 is arranged in a stepped manner, a packing 15 is arranged in an inner cavity of the packing seat 10, a packing gland 11 is arranged above the packing seat 10 in a matched manner, and the packing gland 11 and the packing seat 10 are connected and fixed through fastening screws; the sealing effect is good, and high-pressure liquid is effectively prevented from leaking; a sealing box body 7 is arranged at the lower part of the auxiliary impeller 9, and an adjusting gasket 16 for adjusting the distance between the blades of the auxiliary impeller and the plane of the bottom of the packing seat is arranged between the sealing box body 7 and the packing seat 10; the shaft sleeve 3 is arranged below the auxiliary impeller 9, so that the shaft sleeve is worn in the running process of the pump, the shaft sleeve is only required to be replaced, convenience and rapidness are realized, the time is saved, the whole pump shaft does not need to be replaced, and the maintenance cost is greatly reduced; the sliding bearing 4 is arranged between the shaft sleeve 3 and the sealing box body 7 in a matching way; the sliding bearing is arranged at the shaft seal of the discharge section of the pump and plays a supporting role; the sliding bearing is made of reinforced carbon fiber and has better wear resistance and corrosion resistance; the sealing box body 7 is connected and fixed with the discharge section 2 of the pump.
Specifically, a radial gap is formed between the sliding bearing 4 and the shaft sleeve 3, and the radial gap is small, so that large granular substances are effectively prevented from entering the sealed box body; the inner surface of the sliding bearing 4 is provided with a plurality of annular decompression grooves 12, and the distance between every two adjacent decompression grooves is equal; has good pressure reducing effect.
An exhaust pipe 5 is arranged on the sealed box body 7, one end of the exhaust pipe 5 is communicated with the inside of the sealed box body 7, and the other end of the exhaust pipe is communicated with the suction pool; the air in the honeycomb duct is got rid of when being convenient for the pump start-up, also plays the effect of pressure release simultaneously.
The position of the sealing box body 7 corresponding to the blade of the auxiliary impeller 9 is provided with a plug hole, and a plug screw 8 is arranged in the plug hole; the clearance h between the auxiliary impeller blade and the bottom surface of the sealing seat is convenient to observe due to the arrangement of the plug screw hole, the size of the clearance h is adjusted through the adjusting gasket, and after the clearance is adjusted, the plug screw hole is plugged by the plug screw.
A sealing gasket 6 is arranged between the sealing box body 7 and the discharge section 2 of the pump, so that the sealing effect is further ensured.
The foregoing examples are given for the purpose of illustrating the present invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that variations and modifications of the present invention may be made in other variations and modifications based on the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments, and all such variations and modifications as are obvious and desirable in the art are within the scope of the present invention.
Claims (5)
1. The utility model provides a modular auxiliary impeller sealing device which characterized in that: the pump comprises an auxiliary impeller (9) arranged on a pump shaft (1), an O-shaped sealing ring (14) is arranged between the auxiliary impeller (9) and the pump shaft (1), and a shaft retaining ring (13) is arranged at the upper end of the auxiliary impeller (9); the upper part of the auxiliary impeller (9) is provided with a packing seat (10), the packing seat (10) is arranged in a stepped manner, a packing (15) is arranged in an inner cavity of the packing seat (10), a packing gland (11) is arranged above the packing seat (10) in a matched manner, and the packing gland (11) and the packing seat (10) are connected and fixed through fastening screws; a sealing box body (7) is arranged at the lower part of the auxiliary impeller (9), and an adjusting gasket (16) for adjusting the distance between the blades of the auxiliary impeller and the bottom plane of the packing seat is arranged between the sealing box body (7) and the packing seat (10); a shaft sleeve (3) is arranged below the auxiliary impeller (9), and a sliding bearing (4) is arranged between the shaft sleeve (3) and the sealing box body (7) in a matching way; the sealing box body (7) is connected and fixed with the discharge section (2) of the pump.
2. A combined expeller seal according to claim 1, characterised in that: a radial clearance is arranged between the sliding bearing (4) and the shaft sleeve (3), and a plurality of annular decompression grooves (12) are arranged on the inner surface of the sliding bearing (4).
3. A combined expeller seal according to claim 1, characterised in that: the sealed box body (7) is provided with an exhaust pipe (5), one end of the exhaust pipe (5) is communicated with the inside of the sealed box body (7), and the other end of the exhaust pipe is communicated with the suction pool.
4. A combined expeller seal according to claim 1, characterised in that: and plug screw holes are formed in the positions, corresponding to the blades of the auxiliary impeller (9), of the sealing box body (7), and plug screws (8) are arranged in the plug screw holes.
5. A combined expeller seal according to claim 1, characterised in that: a sealing gasket (6) is arranged between the sealing box body (7) and the discharge section (2) of the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022045579.7U CN213392830U (en) | 2020-09-18 | 2020-09-18 | Combined type auxiliary impeller sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022045579.7U CN213392830U (en) | 2020-09-18 | 2020-09-18 | Combined type auxiliary impeller sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213392830U true CN213392830U (en) | 2021-06-08 |
Family
ID=76179326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022045579.7U Active CN213392830U (en) | 2020-09-18 | 2020-09-18 | Combined type auxiliary impeller sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213392830U (en) |
-
2020
- 2020-09-18 CN CN202022045579.7U patent/CN213392830U/en active Active
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