CN114001049B - Balance structure of multistage split pump - Google Patents
Balance structure of multistage split pump Download PDFInfo
- Publication number
- CN114001049B CN114001049B CN202111108447.7A CN202111108447A CN114001049B CN 114001049 B CN114001049 B CN 114001049B CN 202111108447 A CN202111108447 A CN 202111108447A CN 114001049 B CN114001049 B CN 114001049B
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- China
- Prior art keywords
- balance
- pump
- drum sleeve
- balance drum
- drum
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- 238000013461 design Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a balance structure of a multistage split pump, which comprises a balance drum sleeve, a balance drum, a pump shaft and a pump body, wherein the balance drum is fixed on the pump shaft and rotates along with the pump shaft; the balance drum sleeve is fixedly connected with the pump body; the surface of the balance drum is provided with a spiral labyrinth groove; a space capable of properly balancing the axial force exists between the balancing drum and the balancing drum sleeve. The proper distance exists between the balance drum and the balance drum sleeve, so that the axial force can be properly balanced; the spiral labyrinth groove design on the surface of the balance drum can effectively reduce leakage of liquid between stages, thereby reducing loss and improving efficiency. The axial planing design of the balance drum sleeve ensures that the rotor can be directly assembled without secondary disassembly after the dynamic balance experiment, improves the assembly precision of the rotor and ensures the operation reliability of the pump. The structure can improve the assembly precision of the pump, balance the axial force, increase the pump efficiency, ensure the safe and reliable operation and prolong the service life of the pump.
Description
Technical Field
The invention relates to a balance structure, in particular to a balance structure of a multistage split pump, which can improve the assembly precision of the pump, balance axial force, increase pump efficiency, ensure safe and reliable operation and prolong the service life of the pump.
Background
In the running process of the split pump, the rotor component can receive larger axial force, the axial force is balanced through the bearings and the like in the conventional method, in general, the selection of the bearings is obtained through calculation, but the axial force cannot be accurately calculated only through calculation, in the actual engineering, the conditions of deformation of the lock nut, abnormal heating of the bearings and even shaft breakage occur due to the calculation error of the axial force, the service life of the multistage split pump is shortened, the maintenance cost is increased, and meanwhile, the bearings and the shafts can accept great challenges.
Disclosure of Invention
In view of the above problems, a main object of the present invention is to provide a balance structure of a multistage split pump capable of improving the assembly accuracy of the pump, balancing the axial force, increasing the pump efficiency, ensuring safe and reliable operation, and increasing the service life of the pump.
The invention solves the technical problems by the following technical proposal: a balance structure of a multistage split pump, the balance structure of the multistage split pump comprising: the balance drum sleeve, the balance drum, the pump shaft and the pump body are fixed on the pump shaft and rotate along with the pump shaft; the balance drum sleeve is fixedly connected with the pump body; the surface of the balance drum is provided with a spiral labyrinth groove; a space capable of properly balancing the axial force exists between the balancing drum and the balancing drum sleeve.
In a specific embodiment of the invention, the balance drum is fixed on the pump shaft through a key and rotates along with the pump shaft; the balance drum sleeve is connected with the pump body through a positioning pin; an O-shaped ring for sealing is arranged between the balance drum sleeve and the pump body.
In a specific embodiment of the present invention, the distance between the balancing drum and the balancing drum sleeve is set in the following range: 2.0-3.0mm.
In the specific embodiment of the invention, the balance drum sleeve adopts an axial planing design.
In the concrete implementation example of the invention, the balance drum sleeve is divided into an upper balance drum sleeve and a lower balance drum sleeve, the upper balance drum sleeve or the lower balance drum sleeve is of a partially flattened structure, and the upper balance drum sleeve and the lower balance drum sleeve are fixed together by symmetrically distributed screws and pins on the partially flattened structure.
In the concrete implementation example of the invention, the balance drum sleeve at the joint of the balance drum sleeve and the pump body is provided with a bulge, the pump body is provided with a groove corresponding to the bulge, and the positioning pin is positioned in the bulge and the groove.
In a specific embodiment of the invention, the spiral labyrinth is distributed over the entire balancing drum.
The invention has the positive progress effects that: the balance structure of the multistage split pump provided by the invention has the following advantages: the balance structure of the multistage split pump provided by the invention has the advantages of cost saving, safety, reliability, convenience in disassembly and assembly and good stability, can improve the assembly precision of the pump, balance the axial force, increase the pump efficiency, ensure the safe and reliable operation and prolong the service life of the pump.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a partial enlarged view (at B) of fig. 1.
Fig. 3 is a schematic structural view of the balance drum sleeve of the present invention.
Fig. 4 is a schematic view in the direction a of fig. 3.
The following are names corresponding to the reference numerals in the present invention:
the pump comprises a pump body 1, a locating pin 2, a 0-shaped ring 3, a balance drum sleeve 4, an impeller 5, a balance drum 6, a key 7, a pump shaft 8, a screw 9, a pin 10, a space 11 and a spiral labyrinth groove 12; an upper balancing drum sleeve 401, a lower balancing drum sleeve 402.
Detailed Description
The following description of the preferred embodiments of the present invention is given with reference to the accompanying drawings, so as to explain the technical scheme of the present invention in detail.
Fig. 1 is a schematic overall structure of the present invention, and fig. 2 is a partial enlarged view (at B) of fig. 1, as shown in the above-mentioned figures: the invention provides a balance structure of a multistage split pump, which comprises a balance drum sleeve 4, a balance drum 6, a pump shaft 8 and a pump body 1, wherein the balance drum 6 is fixed on the pump shaft 8 and rotates along with the pump shaft 8; the balance drum sleeve 4 is fixedly connected with the pump body 1; the surface of the balancing drum 6 is provided with a spiral labyrinth groove 12; a distance 11 is provided between the balancing drum 6 and the balancing drum sleeve 4, which distance is capable of properly balancing the axial forces.
The balance drum 6 is fixed on the pump shaft 8 through a key 7 and rotates along with the pump shaft 8; the balance drum sleeve 4 is connected with the pump body 1 through the locating pin 2; an O-ring 3 for sealing is provided between the balance drum sleeve 4 and the pump body 1.
In a specific implementation of the present invention, the distance between the balancing drum 6 and the balancing drum sleeve 4 is set in the following range: 2.0-3.0mm, the parameters can be changed into other data according to specific field conditions and requirements.
Fig. 3 is a schematic structural view of the balance drum sleeve according to the present invention, and fig. 4 is a schematic view of fig. 3 in a direction a, as shown in fig. 3-4: the balancing drum sleeve 4 adopts an axial planing design, so that the rotor can be directly assembled without secondary disassembly after the dynamic balancing experiment, the rotor assembly precision is improved, the operation reliability of the pump is ensured, and the service life of the pump is prolonged. In a specific implementation process, the balancing drum sleeve 4 is divided into an upper part and a lower part, namely an upper balancing drum sleeve 401 and a lower balancing drum sleeve 402, the upper balancing drum sleeve 401 or the lower balancing drum sleeve 402 is of a partially flattened structure, and the upper balancing drum sleeve 401 and the lower balancing drum sleeve 402 are fixed together by symmetrically distributed screws 9 and pins 10 on the partially flattened structure.
The balance drum sleeve 4 at the joint of the balance drum sleeve 4 and the pump body 1 is provided with a bulge, the pump body 1 is provided with a groove corresponding to the bulge, and the positioning pin 2 is positioned in the bulge and the groove.
According to the invention, the balance drum 6 can rotate along with the pump shaft 8 through the key 7; the balance drum sleeve 4 is connected with the pump body 1 through the positioning pin 2, and is kept fixed with the pump body 1, so that relative sliding is prevented; the balance drum sleeve 4 and the pump body 1 are sealed by the O-shaped ring 3, so that no leakage occurs between the balance drum sleeve 6 and the pump body 1; the diameter of the balance drum 6 is obtained through accurate calculation, and the axial force generated by the rotor can be balanced by utilizing the pressure difference between the flow passage and the stages; the balance drum 6 and the balance drum sleeve 4 have proper spacing, so that the axial force can be properly balanced; the spiral labyrinth groove design on the surface of the balance drum can effectively reduce leakage of liquid between stages, thereby reducing loss and improving efficiency, and in a specific implementation process, the spiral labyrinth groove 12 is fully distributed on the whole balance drum 6.
In the specific embodiment example, the screws 9 and the pins 10 are arranged schematically in fig. 4, but may be arranged in other ways in the specific embodiment.
The axial planing design of the balance drum sleeve ensures that the rotor can be directly assembled without secondary disassembly after the dynamic balance experiment, improves the assembly precision of the rotor and ensures the operation reliability of the pump. The structure can improve the assembly precision of the pump, balance the axial force, increase the pump efficiency, ensure the safe and reliable operation and prolong the service life of the pump.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and that various changes and modifications may be effected therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (1)
1. A balanced structure of pump is opened in multistage, its characterized in that: the balance structure of the multistage split pump comprises: the balance drum sleeve, the balance drum, the pump shaft and the pump body are fixed on the pump shaft and rotate along with the pump shaft; the balance drum sleeve is fixedly connected with the pump body; the surface of the balance drum is provided with a spiral labyrinth groove; a space capable of properly balancing axial force exists between the balance drum and the balance drum sleeve;
The balance drum is fixed on the pump shaft through a key and rotates along with the pump shaft; the balance drum sleeve is connected with the pump body through a positioning pin; an O-shaped ring for sealing is arranged between the balance drum sleeve and the pump body;
The range of the interval between the balance drum and the balance drum sleeve is as follows: 2.0-3.0mm;
The balance drum sleeve adopts an axial planing design;
The balancing drum sleeve is divided into an upper balancing drum sleeve and a lower balancing drum sleeve, the upper balancing drum sleeve or the lower balancing drum sleeve is of a partially flattened structure, and the upper balancing drum sleeve and the lower balancing drum sleeve are fixed together by symmetrically distributed screws and pins on the partially flattened structure;
The balance drum sleeve at the joint of the balance drum sleeve and the pump body is provided with a bulge, the pump body is provided with a groove corresponding to the bulge, and the positioning pin is positioned in the bulge and the groove;
The spiral labyrinth grooves are distributed over the entire balancing drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111108447.7A CN114001049B (en) | 2021-09-22 | 2021-09-22 | Balance structure of multistage split pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111108447.7A CN114001049B (en) | 2021-09-22 | 2021-09-22 | Balance structure of multistage split pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114001049A CN114001049A (en) | 2022-02-01 |
| CN114001049B true CN114001049B (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111108447.7A Active CN114001049B (en) | 2021-09-22 | 2021-09-22 | Balance structure of multistage split pump |
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| Country | Link |
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| CN (1) | CN114001049B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865138A (en) * | 2010-07-06 | 2010-10-20 | 浙江工业大学 | Novel multistage centrifugal pump |
| CN210829895U (en) * | 2019-10-16 | 2020-06-23 | 大连罗斯泵业有限公司 | Novel balance drum sleeve of multistage pump |
| CN112628146A (en) * | 2020-12-31 | 2021-04-09 | 上海凯泉泵业（集团）有限公司 | Multistage double suction pump with vertical structure |
| CN113417856A (en) * | 2021-08-02 | 2021-09-21 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of water-water high-energy reactor third-generation nuclear power unit |
| CN216691574U (en) * | 2021-09-22 | 2022-06-07 | 上海凯泉泵业（集团）有限公司 | Balance structure of multistage split pump |
-
2021
- 2021-09-22 CN CN202111108447.7A patent/CN114001049B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865138A (en) * | 2010-07-06 | 2010-10-20 | 浙江工业大学 | Novel multistage centrifugal pump |
| CN210829895U (en) * | 2019-10-16 | 2020-06-23 | 大连罗斯泵业有限公司 | Novel balance drum sleeve of multistage pump |
| CN112628146A (en) * | 2020-12-31 | 2021-04-09 | 上海凯泉泵业（集团）有限公司 | Multistage double suction pump with vertical structure |
| CN113417856A (en) * | 2021-08-02 | 2021-09-21 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of water-water high-energy reactor third-generation nuclear power unit |
| CN216691574U (en) * | 2021-09-22 | 2022-06-07 | 上海凯泉泵业（集团）有限公司 | Balance structure of multistage split pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114001049A (en) | 2022-02-01 |
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