CN219012958U - Ceramic pump capable of preventing impeller from loosening - Google Patents
Ceramic pump capable of preventing impeller from loosening Download PDFInfo
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- CN219012958U CN219012958U CN202222622957.2U CN202222622957U CN219012958U CN 219012958 U CN219012958 U CN 219012958U CN 202222622957 U CN202222622957 U CN 202222622957U CN 219012958 U CN219012958 U CN 219012958U
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- impeller
- pump shaft
- round table
- sealing cover
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Abstract
The utility model discloses a ceramic pump for preventing an impeller from loosening, which comprises an impeller, an impeller sealing cover, a locking nut and a pump shaft, wherein the impeller sealing cover is arranged on the impeller; the impeller is formed by processing ceramic materials, the pump shaft and the lock nut are formed by processing metal materials, and the impeller sealing cover consists of a metal framework and a ceramic outer liner; the impeller is sleeved at the front end of the pump shaft, and is limited axially backwards through a step surface at the rear end of the pump shaft step-shaped positioning round table; the locking nut is in threaded connection with the side wall of the positioning round table with the smaller front end in the pump shaft stepped positioning round table, so that the impeller is limited axially forwards relative to the pump shaft; the connecting stud at the rear end of the impeller sealing cover is screwed into the threaded hole at the front end of the pump shaft, and the outer edge of the circular cover plate of the impeller sealing cover is tightly pressed on the step surface at the front side of the stepped annular groove of the impeller hub, so that the impeller is further limited forward and axially. The ceramic pump for preventing the impeller from loosening reduces the risk of medium leakage.
Description
Technical Field
The utility model relates to a ceramic pump for preventing an impeller from loosening, and belongs to the field of fluid machinery.
Background
The impeller is the core spare part of pump, and the impeller rotates along with the axle, carries out the medium, and its in the course of the work can receive the axial force that the impact force and the fluid pressure differential that come from the medium arouse, simultaneously, when stopping the pump, because the water hammer effect can cause the impeller to reverse in a short time, in order to guarantee the normal work of impeller, must design impeller locking structure at impeller spindle nose to prevent the pine of impeller.
Meanwhile, with the progress and development of modern technology, the concentration of medium at part of stations is higher and higher, and the requirement on the pump products of the conveying device is higher and higher. For example, in a wastewater zero-discharge station of a desulfurization system of a power plant, a medium has high corrosiveness and certain abrasiveness, and a conventional metal pump has extremely short service life, so that a ceramic pump is generated for coping with similar special stations.
The impeller and the pump body of the traditional ceramic pump are processed by ceramic materials, but the pump shaft serving as a supporting and driving part is processed by metal materials because the requirements of supporting strength and connection with driving equipment are met, and the locking nut used for locking the impeller at the front end of the pump shaft is processed by metal materials so as to be capable of being reliably fixed with the pump shaft in a threaded manner and tightly pressing the end face of the impeller hub, the locking nut is processed by metal materials, and the back end face of the outer ring of the locking nut is in grooved connection with a sealing ring to tightly press and seal the front end face of the impeller hub. The technology has the following defects that firstly, the lock nut is made of a metal material and cannot cope with a high-corrosion and abrasion medium; secondly, the hardness of the ceramic material is higher, the processing flatness is far lower than that of metal, the seal at the butt joint of the metal surface and the ceramic surface is line contact seal, and the seal used on the ceramic surface is easy to generate medium leakage.
Disclosure of Invention
The utility model aims to solve the problems of easy corrosion and poor sealing reliability at the impeller locking structure of the traditional ceramic pump, which lead to the loosening of the impeller, and provides the ceramic pump for preventing the loosening of the impeller.
The utility model aims at realizing the following technical scheme:
the utility model relates to a ceramic pump for preventing an impeller from loosening, which comprises an impeller, an impeller sealing cover, a locking nut and a pump shaft;
the impeller is formed by processing ceramic materials, and a stepped annular groove is processed at the front port part of the impeller hub;
the pump shaft is formed by processing a metal material, a threaded hole is formed in the front end part of the pump shaft, a stepped positioning round table is formed in the side wall of the front end of the pump shaft, the diameter of a larger positioning round table at the middle and rear end of the stepped positioning round table is matched with the inner diameter of the impeller hub, and connecting threads are formed in the side wall of a smaller positioning round table at the middle and front end of the stepped positioning round table;
the impeller sealing cover consists of a metal framework and a ceramic outer liner, wherein the front end of the metal framework is a round cover plate, and the rear end of the metal framework is a connecting stud vertically fixed at the center of the rear end face of the round cover plate; the front plate surface and the outer edge of the circular cover plate of the metal framework are pressed with ceramic outer liners, the diameter of the outer edge of the ceramic outer liner of the impeller sealing cover is matched with the diameter of a larger annular groove at the front side in the stepped annular groove of the impeller hub, and a connecting stud of the impeller sealing cover is matched with a threaded hole at the front end of the pump shaft in a threaded manner;
the locking nut is formed by processing metal materials, the outer diameter of the locking nut is not smaller than the inner diameter of the impeller hub, and the internal thread of the locking nut is matched with the connecting thread of the side wall of the positioning round table with the smaller front end in the pump shaft stepped positioning round table;
the impeller is sleeved at the front end of the pump shaft, and the impeller is limited axially backwards relative to the pump shaft through a step surface at the rear end of the pump shaft step-shaped positioning round table; the locking nut is in threaded connection with the side wall of the positioning round table with the smaller front end in the pump shaft stepped positioning round table, and the rear end face of the locking nut is pressed on the step face at the rear side of the impeller hub stepped annular groove, so that the impeller is limited axially forwards relative to the pump shaft; the connecting stud at the rear end of the impeller sealing cover is screwed into the threaded hole at the front end of the pump shaft, and the outer edge of the circular cover plate of the impeller sealing cover is pressed on the step surface at the front side of the stepped annular groove of the impeller hub, so that the impeller is further limited axially forwards relative to the pump shaft.
The outer edge of the impeller sealing cover ceramic outer liner is sealed with the step surface at the front side of the stepped annular groove of the impeller hub through a sealing gasket.
The impeller sealing cover is characterized in that an annular groove is formed in the front plate surface of the metal framework circular cover plate, so that the binding force between the ceramic outer lining and the metal framework circular cover plate is improved.
Advantageous effects
The ceramic pump for preventing the impeller from loosening has the advantages of simple structure, convenient installation and good corrosion and abrasion resistance, and improves the operation reliability of the pump by adopting a double locking structure of the locking nut and the impeller sealing cover; the butt joint of the impeller sealing cover round cover plate and the impeller hub is sealed reliably, and the risk of medium leakage is reduced.
Drawings
FIG. 1 is a schematic view of a ceramic pump of the present utility model for preventing loosening of an impeller;
in the figure, 1-impeller, 2-sealing gasket, 3-impeller sealing cover, 4-locking nut and 5-pump shaft.
Detailed Description
The utility model is further described below with reference to the drawings and examples:
examples
As shown in fig. 1, the ceramic pump for preventing the impeller from loosening comprises an impeller 1, an impeller sealing cover 3, a locking nut 4 and a pump shaft 5;
the impeller 1 is processed by adopting a ceramic material, and a stepped annular groove is processed at the front port part of the hub of the impeller 1;
the pump shaft 5 is processed by adopting a metal material, a threaded hole is processed at the front end part of the pump shaft 5, a step-shaped positioning round table is processed on the side wall of the front end of the pump shaft 5, the diameter of a larger positioning round table at the middle and rear end of the step-shaped positioning round table is matched with the inner diameter of the hub of the impeller 1, and a connecting thread is processed on the side wall of a smaller positioning round table at the middle and front end of the step-shaped positioning round table;
the impeller sealing cover 3 consists of a metal framework and a ceramic outer liner, wherein the front end of the metal framework is a round cover plate, and the rear end of the metal framework is a connecting stud vertically fixed at the center of the rear end face of the round cover plate; the front plate surface and the outer edge of the circular cover plate with the metal framework are pressed with ceramic outer liners, the diameter of the outer edge of the ceramic outer liner of the impeller sealing cover 3 is matched with the diameter of a larger annular groove at the front side in the stepped annular groove of the hub of the impeller 1, and a connecting stud of the impeller sealing cover 3 is matched with a threaded hole at the front end of the pump shaft 5 in a threaded manner;
the lock nut 4 is formed by processing metal materials, the outer diameter of the lock nut 4 is not smaller than the inner diameter of the hub of the impeller 1, and the internal thread of the lock nut 4 is matched with the connecting thread of the side wall of the positioning round table with the smaller front end in the step-shaped positioning round table of the pump shaft 5;
the impeller 1 is sleeved at the front end of the pump shaft 5, and the impeller 1 is limited axially backwards relative to the pump shaft 5 through a step surface at the rear end of the pump shaft 5 step-shaped positioning round table; the locking nut 4 is in threaded connection with the side wall of the positioning round table with the smaller front end in the step-shaped positioning round table of the pump shaft 5, and the rear end surface of the locking nut 4 is pressed on the step surface at the rear side of the step-shaped annular groove of the hub of the impeller 1, so that the impeller 1 is limited forwards axially relative to the pump shaft 5; the connecting stud at the rear end of the impeller sealing cover 3 is screwed into the threaded hole at the front end of the pump shaft 5, and the outer edge of the circular cover plate of the impeller sealing cover 3 is pressed on the step surface at the front side of the stepped annular groove of the hub of the impeller 1, so that the impeller 1 is further limited in the forward axial direction relative to the pump shaft 5;
the outer edge of the ceramic outer lining of the impeller sealing cover 3 is sealed with the step surface at the front side of the stepped annular groove of the hub of the impeller 1 through a sealing gasket 2.
An annular groove is formed in the front plate surface of the circular cover plate of the metal framework of the impeller sealing cover 3 so as to improve the binding force between the ceramic outer lining and the circular cover plate of the metal framework.
Claims (3)
1. A prevent ceramic pump that impeller pine takes off, characterized by: comprises an impeller, an impeller sealing cover, a locking nut and a pump shaft;
the impeller is formed by processing ceramic materials, and a stepped annular groove is processed at the front port part of the impeller hub;
the pump shaft is formed by processing a metal material, a threaded hole is formed in the front end part of the pump shaft, a stepped positioning round table is formed in the side wall of the front end of the pump shaft, the diameter of a larger positioning round table at the middle and rear end of the stepped positioning round table is matched with the inner diameter of the impeller hub, and connecting threads are formed in the side wall of a smaller positioning round table at the middle and front end of the stepped positioning round table;
the impeller sealing cover consists of a metal framework and a ceramic outer liner, wherein the front end of the metal framework is a round cover plate, and the rear end of the metal framework is a connecting stud vertically fixed at the center of the rear end face of the round cover plate; the front plate surface and the outer edge of the circular cover plate of the metal framework are pressed with ceramic outer liners, the diameter of the outer edge of the ceramic outer liner of the impeller sealing cover is matched with the diameter of a larger annular groove at the front side in the stepped annular groove of the impeller hub, and a connecting stud of the impeller sealing cover is matched with a threaded hole at the front end of the pump shaft in a threaded manner;
the locking nut is formed by processing metal materials, the outer diameter of the locking nut is not smaller than the inner diameter of the impeller hub, and the internal thread of the locking nut is matched with the connecting thread of the side wall of the positioning round table with the smaller front end in the pump shaft stepped positioning round table;
the impeller is sleeved at the front end of the pump shaft, and the impeller is limited axially backwards relative to the pump shaft through a step surface at the rear end of the pump shaft step-shaped positioning round table; the locking nut is in threaded connection with the side wall of the positioning round table with the smaller front end in the pump shaft stepped positioning round table, and the rear end face of the locking nut is pressed on the step face at the rear side of the impeller hub stepped annular groove, so that the impeller is limited axially forwards relative to the pump shaft; the connecting stud at the rear end of the impeller sealing cover is screwed into the threaded hole at the front end of the pump shaft, and the outer edge of the circular cover plate of the impeller sealing cover is pressed on the step surface at the front side of the stepped annular groove of the impeller hub, so that the impeller is further limited axially forwards relative to the pump shaft.
2. A ceramic pump for preventing loosening of an impeller as claimed in claim 1, wherein: the outer edge of the impeller sealing cover ceramic outer liner is sealed with the step surface at the front side of the stepped annular groove of the impeller hub through a sealing gasket.
3. A ceramic pump for preventing loosening of an impeller as claimed in claim 1 or 2, characterized in that: the impeller sealing cover metal framework circular cover plate is provided with an annular groove on the front plate surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222622957.2U CN219012958U (en) | 2022-09-30 | 2022-09-30 | Ceramic pump capable of preventing impeller from loosening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222622957.2U CN219012958U (en) | 2022-09-30 | 2022-09-30 | Ceramic pump capable of preventing impeller from loosening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219012958U true CN219012958U (en) | 2023-05-12 |
Family
ID=86236077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222622957.2U Active CN219012958U (en) | 2022-09-30 | 2022-09-30 | Ceramic pump capable of preventing impeller from loosening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219012958U (en) |
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2022
- 2022-09-30 CN CN202222622957.2U patent/CN219012958U/en active Active
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