CN113027805B - Pressurized sealing energy-saving device for pump - Google Patents
Pressurized sealing energy-saving device for pump Download PDFInfo
- Publication number
- CN113027805B CN113027805B CN202110340519.4A CN202110340519A CN113027805B CN 113027805 B CN113027805 B CN 113027805B CN 202110340519 A CN202110340519 A CN 202110340519A CN 113027805 B CN113027805 B CN 113027805B
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- CN
- China
- Prior art keywords
- impeller
- pump
- sealing
- main shaft
- pressurizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 76
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 17
- 238000010992 reflux Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
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- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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 booster-type sealing energy-saving device for a pump, which comprises two structural forms: each structural form comprises a pump body, an impeller, a main shaft, a pressurizing sealing pore plate, a transmission key and a fastening piece; the impeller is fixed on the main shaft and rotates at a high speed along with the main shaft, the pressurizing sealing orifice plate is fixed at the inlet of the pump body through a fastener, and a gap between the pressurizing sealing orifice plate and the impeller forms a sealing cavity structure; the impeller is fixedly connected with the main shaft through a transmission key. The supercharged sealing energy-saving device for the pump improves the flowing state of the conveying medium at the inlet of the impeller, overcomes the defects of large reflux quantity and mutual impact between the conveying medium at the suction inlet of the impeller of the traditional pump, improves the efficiency of conveying fluid by the pump, and solves the problems of easy abrasion and difficult disassembly of the sealing ring of the traditional pump.
Description
Technical Field
The invention relates to an energy-saving device, in particular to a supercharged sealing energy-saving device for a pump, which improves the flow field distribution state of a conveying medium at an impeller suction inlet of the pump, overcomes the defects of large reflux flow rate and mutual impact between an incoming flow medium and reflux flow at the impeller suction inlet of the traditional pump, improves the efficiency of the conveying medium of the pump and achieves the aim of high efficiency and energy saving of the pump.
Background
At present, the method of adding sealing rings at impeller ring is generally adopted for reducing the reflux quantity in the pump, thereby playing a role in sealing. This method has the following disadvantages: the machining precision of parts is high, otherwise, the ideal sealing effect is difficult to achieve; the impeller sealing ring is easy to wear, the pump efficiency can be reduced after the impeller sealing ring is worn, and the impeller sealing ring is required to be replaced by disassembling the pump on site, so that a plurality of inconveniences are brought.
Disclosure of Invention
Aiming at the problems, the invention mainly aims to provide the booster-type sealing energy-saving device for the pump, which is used for improving the flow field distribution state of the conveying medium at the suction inlet of the impeller of the pump, overcoming the defects of large reflux flow and mutual impact between the incoming flow medium and the reflux flow at the suction inlet of the impeller of the traditional pump, improving the efficiency of the conveying medium of the pump and achieving the purposes of high efficiency and energy saving of the pump.
The invention solves the technical problems by the following technical proposal: a booster-type seal economizer for a pump, the booster-type seal economizer for a pump comprising two structural forms: each structural form comprises a pump body, an impeller, a main shaft, a pressurizing sealing pore plate, a transmission key and a fastening piece; the impeller is fixed on the main shaft and rotates at a high speed along with the main shaft, the pressurizing sealing orifice plate is fixed at the inlet of the pump body through a fastener, and a gap between the pressurizing sealing orifice plate and the impeller forms a sealing cavity structure; the impeller is fixedly connected with the main shaft through a transmission key.
In a specific embodiment of the present invention, a seal cavity structure formed between a pressurizing seal orifice plate and an impeller ring includes: a pressurizing sealing pore plate fixedly connected to the pump body through threads by a fastener, and a plurality of through holes are uniformly distributed along the circumferential direction of the pore plate; the impeller is fixedly connected on the main shaft through threads by a connecting screw, and a stepped annular bulge structure is arranged at the inlet of the impeller.
In a specific embodiment of the invention, the impeller is screwed to the main shaft by means of a coupling screw.
In a specific embodiment of the present invention, the fastener is a screw, and the pressurizing sealing orifice plate is fixed on the pump body by the screw through threads.
In a specific embodiment of the present invention, the through hole is formed on the pressurizing sealing orifice plate, and the shape of the through hole includes: cylindrical through hole, conical through hole and cylindrical cone combination type through hole.
In a specific embodiment of the present invention, the depth range of the through hole is: 30-60 mm, pore size range: 5-30 mm; the length ratio range of the cylindrical and conical combined through holes is as follows: 1:1-3:1.
In a specific embodiment of the invention, a stepped annular bulge structure is arranged at the inlet of the impeller.
In a specific embodiment of the present invention, the impeller is a shrouded impeller.
The invention has the positive progress effects that: the supercharged sealing energy-saving device for the pump has the following advantages:
1. the application of the booster-type sealing energy-saving device for the pump fundamentally solves the problem of backflow in the cavity of the traditional pump, reduces the volumetric loss of the pump, improves the operation efficiency of the pump, and achieves the purpose of high efficiency and energy saving of the pump.
2. The application of the booster-type sealing energy-saving device for the pump fundamentally improves the flow state of the inlet of the impeller, reduces the local loss in the pump, improves the operation efficiency of the pump, and achieves the purpose of saving energy of the pump.
3. The application of the booster-type sealing energy-saving device for the pump fundamentally solves the problems that the sealing ring of the traditional pump is easy to wear and difficult to detach.
The supercharged sealing energy-saving device for the pump improves the flowing state of the conveying medium at the inlet of the impeller, overcomes the defects of large reflux quantity and mutual impact between the conveying medium at the suction inlet of the impeller of the traditional pump, improves the efficiency of conveying fluid by the pump, and solves the problems of easy abrasion and difficult disassembly of the sealing ring of the traditional pump.
Drawings
Fig. 1 shows a booster seal energy-saving device for a horizontal pump.
Fig. 2 shows a booster seal energy saving device for a vertical pump.
FIG. 3 is a schematic view of a cylindrical through-hole pressurization seal orifice plate structure.
FIG. 4 is a schematic view of a conical through-hole pressurization seal orifice plate structure.
FIG. 5 is a schematic view of a cylindrical-conical combined pressurized seal orifice plate structure.
FIG. 6 is a second schematic view of a cylindrical-conical combined pressurized seal orifice structure.
FIG. 7 is a flow field schematic diagram of a pressurized seal economizer for a pump.
The following are names corresponding to the reference numerals in the present invention:
Pump body 1, impeller 2, main shaft 3, pressurization sealed orifice plate 4, drive key 5, coupling screw 6, fastener 7.
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 supercharged sealing energy-saving device for a horizontal pump, fig. 2 is a supercharged sealing energy-saving device for a vertical pump, fig. 3 is a schematic view of a cylindrical through hole supercharging sealing hole plate structure, and fig. 4 is a schematic view of a conical through hole supercharging sealing hole plate structure. As shown in the above figures: the supercharged sealing energy-saving device for the pump provided by the invention comprises two structural forms: a booster-type seal energy-saving device for a horizontal pump (fig. 1), a booster-type seal energy-saving device for a vertical pump (fig. 2); each structural form comprises a pump body 1, an impeller 2, a main shaft 3, a pressurizing sealing pore plate 4, a transmission key 5, a connecting screw 6 and a fastening piece 7. The impeller is fixedly connected to the main shaft 3 by a connecting screw 6, and the impeller 2 is connected with the main shaft 3 through a transmission key 5 and rotates at a high speed along with the main shaft 3; the supercharged sealing orifice plate 4 is fixedly connected to the inlet of the pump body 1 through a fastener 7; the annular gap of the impeller 2 and the pressurizing sealing orifice plate 4 form a high-pressure sealing cavity.
The sealing cavity structure formed by the annular gap between the pressurizing sealing orifice plate 4 and the impeller 2 comprises: a pressurizing sealing orifice plate 4 fixedly connected to the pump body 1 through threads by a fastener 7, and a plurality of through holes are uniformly distributed along the circumferential direction of the orifice plate 4; the impeller 2 is fixedly connected on the main shaft 3 through threads by a connecting screw 6, and the inlet of the impeller 2 is provided with a stepped annular bulge structure.
Fig. 3 is a schematic view of a cylindrical through hole pressurization sealing hole plate structure, fig. 4 is a schematic view of a conical through hole pressurization sealing hole plate structure, fig. 5 is one of the schematic views of a cylindrical-conical combined pressurization sealing hole plate structure, and fig. 6 is the second schematic view of a cylindrical-conical combined pressurization sealing hole plate structure, as shown in the above figures: the through hole is opened on the pressurizing sealing orifice plate 4, and the shape of the through hole comprises: cylindrical through holes (figure 3), conical through holes (figure 4) and cylindrical-conical combined through holes (figures 5 and 6); depth range of the through hole: 30-60 mm, through hole aperture range: 5-30 mm; the length ratio range of the cylindrical and conical combined through holes is as follows: 1:1-3:1.
In the invention, a stepped annular bulge is arranged at the inlet of the impeller 2, and the impeller 2 is a closed impeller.
The booster-type sealing energy-saving device for the pump comprises a high-pressure sealing cavity formed by a booster sealing pore plate 4 which is fixedly connected with a pump body 1 through a fastener 7 through threads and a rotating piece impeller 2 with a stepped annular structure at a suction inlet, wherein the impeller 2 is fixedly connected with a main shaft 3 through threads through a connecting screw 6 and rotates at a high speed along with the main shaft 3.
The booster-type sealing energy-saving device for the pump is characterized in that an impeller 2 is connected with a main shaft 3 through a transmission key 5, and is fixed on the main shaft 3 through a threaded connection by a connection screw 6, the booster-type sealing energy-saving device rotates at a high speed along with the main shaft 3, the energy of fluid medium flowing through the impeller 2 is increased, a pump cavity flows back, namely, part of high-energy conveying medium flows back to an inlet of the impeller 2 through a gap between a pump body 1 and the impeller 2. According to the booster-type sealing energy-saving device for the pump, disclosed by the invention, the flow field distribution state (see figure 7) of a fluid medium at the suction inlet of the impeller is changed, on one hand, a booster sealing pore plate fixedly connected on the pump body 1 through the connecting screw 6 can effectively play a sealing role, and the backflow of a high-energy pump cavity is prevented from flowing back to the suction inlet of the impeller, so that the volumetric loss of the pump is reduced, and the operation efficiency of the pump is improved; on the other hand, the stepped annular convex guide at the inlet of the impeller 2 flows through the fluid medium of the pressurizing sealing orifice plate 4, so that the flowing direction of the fluid medium is consistent with the flowing direction of the fluid pumped by the suction inlet of the impeller 2, the local loss in the pump is reduced, and the purpose of high efficiency and energy saving of the pump is achieved.
The working process of the booster-type sealing energy-saving device for the pump is as follows:
In the operation process of the pump, the impeller 2 is connected with the main shaft 3 through the transmission key 5, and is fixed on the main shaft 3 through the threaded connection by the connection screw 6, and rotates at a high speed along with the main shaft 3, the rotating impeller 2 transmits energy to a medium passing through an impeller runner, the medium energy is increased and flows into a pump cavity from an outlet of the impeller 2, and the backflow of the pump cavity flows back to an inlet of the impeller 2 through a gap between the pump body 1 and the impeller 2, so that the loss of flow in the pump is caused. In order to improve the operation efficiency of the pump, the design of the booster-type sealing energy-saving device for the pump fundamentally changes the flow field distribution state of the fluid medium at the suction inlet of the impeller. On one hand, the pressurizing sealing pore plate fixedly connected on the pump body 1 through the fastening piece 7 can effectively play a role in sealing, and prevent the high-energy pump cavity from flowing back and returning to the impeller suction inlet, so that the volume loss is reduced, and the pump operation efficiency is improved; on the other hand, the stepped annular convex guide at the inlet of the impeller 2 flows through the fluid medium of the pressurizing sealing orifice plate 4, so that the flowing direction of the fluid medium is consistent with the flowing direction of the fluid pumped by the suction inlet of the impeller 2, the local loss in the pump is reduced, and the purpose of high efficiency and energy saving of the pump is achieved.
The working principle of the booster-type sealing energy-saving device for the pump is as follows (figure 7): when the pumping fluid flows through the suction inlet of the impeller, part of the fluid passes through the cylindrical through holes ab and a ' b ' of the pressurizing sealing pore plate to reach the flow surfaces b and b ', then enters the conical holes bc and b ' c ', the flow area of the fluid medium is gradually increased, the flow speed is gradually reduced, the pressure is increased along with the flow speed, and the speed energy is converted into pressure energy. Finally, the high-energy fluid is injected into the gap between the sealing pore plate for the pump and the impeller, so that the energy of the back flow of the pump cavity can be balanced, and the back flow of the pump cavity is prevented from returning to the suction inlet of the impeller. If the pressure of the fluid medium flowing through the sealing orifice plate and the reflux pressure of the pump cavity reach balance, the complete sealing effect can be realized. The liquid flowing back to the pump inlet from the pump pressurizing sealing orifice plate and the impeller clearance changes the flow direction when entering the impeller through the stepped annular bulge at the impeller suction inlet, and the flow direction is consistent with the flow direction of the fluid pumped by the impeller suction inlet, thereby effectively avoiding the local loss generated by flow impact in 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 (3)
1. The utility model provides a booster-type sealed economizer for pump which characterized in that: the supercharged sealing energy-saving device for the pump comprises two structural forms: each structural form comprises a pump body, an impeller, a main shaft, a pressurizing sealing pore plate, a transmission key and a fastening piece; the impeller is fixed on the main shaft and rotates at a high speed along with the main shaft, the pressurizing sealing orifice plate is fixed at the inlet of the pump body through a fastener, and a gap between the pressurizing sealing orifice plate and the impeller forms a sealing cavity structure; the impeller is fixedly connected with the main shaft through a transmission key;
The sealed cavity structure that forms between pressurization sealed orifice plate and the impeller ring includes: a pressurizing sealing pore plate fixedly connected to the pump body through threads by a fastener, and a plurality of through holes are uniformly distributed along the circumferential direction of the pore plate; an impeller fixedly connected on the main shaft through threads by a connecting screw;
the through hole is opened on the pressurization sealing orifice plate, and the shape of the through hole comprises: cylindrical through holes, conical through holes and cylindrical and conical combined through holes;
the depth range of the through hole is as follows: 30-60 mm, pore size range: 5-30 mm; the length ratio range of the cylindrical and conical combined through holes is as follows: 1:1-3:1;
The inlet of the impeller is provided with a stepped annular bulge structure.
2. The pressurized seal economizer for a pump of claim 1 wherein: the fastener is a screw, and the pressurizing sealing pore plate is fixed on the pump body through threads by the screw.
3. The pressurized seal economizer for a pump of claim 1 wherein: the impeller is a closed impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340519.4A CN113027805B (en) | 2021-03-30 | 2021-03-30 | Pressurized sealing energy-saving device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340519.4A CN113027805B (en) | 2021-03-30 | 2021-03-30 | Pressurized sealing energy-saving device for pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113027805A CN113027805A (en) | 2021-06-25 |
| CN113027805B true CN113027805B (en) | 2024-05-17 |
Family
ID=76453120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110340519.4A Active CN113027805B (en) | 2021-03-30 | 2021-03-30 | Pressurized sealing energy-saving device for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113027805B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194763A (en) * | 2016-09-20 | 2016-12-07 | 浙江工业大学 | The self-priming centrifugal pump of high anti-cavitation |
| CN106438449A (en) * | 2016-10-12 | 2017-02-22 | 浙江远邦流体科技有限公司 | Seal assembly for centrifugal pump and centrifugal pump |
| CN214742310U (en) * | 2021-03-30 | 2021-11-16 | 上海凯泉泵业（集团）有限公司 | Booster-type sealing energy-saving device for pump |
-
2021
- 2021-03-30 CN CN202110340519.4A patent/CN113027805B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194763A (en) * | 2016-09-20 | 2016-12-07 | 浙江工业大学 | The self-priming centrifugal pump of high anti-cavitation |
| CN106438449A (en) * | 2016-10-12 | 2017-02-22 | 浙江远邦流体科技有限公司 | Seal assembly for centrifugal pump and centrifugal pump |
| CN214742310U (en) * | 2021-03-30 | 2021-11-16 | 上海凯泉泵业（集团）有限公司 | Booster-type sealing energy-saving device for pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113027805A (en) | 2021-06-25 |
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