CN117967579A - High-pressure high-lift pump with external liquid collecting pipe - Google Patents
High-pressure high-lift pump with external liquid collecting pipe Download PDFInfo
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- CN117967579A CN117967579A CN202410383854.6A CN202410383854A CN117967579A CN 117967579 A CN117967579 A CN 117967579A CN 202410383854 A CN202410383854 A CN 202410383854A CN 117967579 A CN117967579 A CN 117967579A
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- external liquid
- pressure chamber
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- 239000007788 liquid Substances 0.000 title claims abstract description 163
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 25
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 20
- 230000005540 biological transmission Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 2
- 239000010839 body fluid Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
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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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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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
- F04D29/40—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
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a high-pressure high-lift pump with an external liquid collecting pipe, which belongs to the technical field of fluid machinery and comprises a fixed shell, wherein a pressurizing mechanism is arranged in the fixed shell, and two ends of the fixed shell are respectively provided with a liquid inlet and an external liquid collecting pipe. The external liquid collecting pipes are arranged outside the cavity and are uniformly distributed, so that the interference of the external liquid collecting pipes to the flow field is effectively reduced, and the efficiency and the flow of the pump are improved. The design of the external liquid collecting pipe can avoid interference with the flow field in the high-pressure chamber, and avoid the influence of vibration, corrosion, cavitation and cavitation, thereby prolonging the service life of the external liquid collecting pipe; the caliber of the external liquid collecting pipe is set to be 4-20 mm, the flow field is effectively prevented from being disturbed, the flow is greatly increased due to the integral design of the external liquid collecting pipe, the efficient pressurization can be realized, the lift is large, the working efficiency of the pump is improved, and the novel pump with the characteristics of high pressure and large lift is formed.
Description
Technical Field
The invention relates to the technical field of fluid machinery, in particular to a high-pressure high-lift pump with an externally-arranged liquid collecting pipe.
Background
The prior pitot tube pump has simple structure and smaller volume, but can form larger hydraulic lift, has stable operation and good sealing, and is widely applied in industrial scenes such as water supply systems, chemical processes, sewage treatment and the like. Pitot tube pumps have large head and high efficiency, but have lower working pressure and smaller flow than other types of pump devices, which makes the rotary shell pump limited in application.
Because the liquid collecting pipe of the pitot tube pump is arranged in the pump body and is in an cantilever beam type structure, the internal flow field is greatly disturbed, and frequency domain resonance is generated and noise is generated during high-speed rotation. The welding head with the built-in liquid collecting pipe is easy to generate cavitation and stress corrosion in the pump body fluid, so that the service life of the pump body fluid is greatly shortened. The pump flow is small, mainly due to the restriction of the collector tube. In order to improve the lift, pressure and flow of the pitot tube pump, a high-pressure large-lift pump with an external liquid collecting pipe is provided.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the high-pressure high-lift pump with the external liquid collecting pipe.
The technical scheme for solving the technical problems is as follows:
The utility model provides an external high pressure high lift pump of collecting pipe, includes fixed casing, fixed casing is inside to be the cavity structure, be equipped with the booster mechanism that is used for carrying out the pressure boost to liquid in the fixed casing, booster mechanism is multistage impeller formula pressure boost, fixed casing's one end is equipped with the inlet, fixed casing's the other end is equipped with external collecting pipe, and liquid flows out through external collecting pipe after the booster mechanism pressure boost, external collecting pipe sets up a plurality ofly, and a plurality of external collecting pipe evenly distributed are in the fixed casing outside.
Further, the caliber of the external liquid collecting pipe is 4-20 mm.
Further, the surface roughness Ra of the inner wall of the external liquid collecting pipe is 0.012 mm-0.2 mm.
Further, the cross section shape of the external liquid collecting pipe is circular, and the orifice of the external liquid collecting pipe is provided with a throttle valve for increasing flow and avoiding pump body vibration.
Further, the diameter of the external liquid collecting pipe gradually increases from one end close to the fixed shell to one end far away from the fixed shell, the small port of the external liquid collecting pipe is arranged inside the fixed shell, the majority of the external liquid collecting pipe is arranged outside the fixed shell, the volume of the external liquid collecting pipe is small inside the fixed shell, the interference of the external liquid collecting pipe to a flow field is effectively reduced, and the vibration and cavitation phenomena of the external liquid collecting pipe are restrained.
Further, the pressurizing mechanism comprises a centrifugal pressurizing chamber located at one end of the liquid inlet, the centrifugal pressurizing chamber is provided with a multi-stage impeller, centrifugal force is generated through operation of the impeller, liquid is sucked into the centrifugal pressurizing chamber through the liquid inlet to be primarily pressurized, and a guide vane for reducing the flow rate of the liquid is arranged on one side, away from the liquid inlet, of the impeller.
Furthermore, the pressurizing mechanism further comprises a high-pressure chamber positioned at one end of the external liquid collecting pipe, the high-pressure chamber is provided with a high-strength closed impeller, the high-strength closed impeller is different from the common closed impeller in arrangement, the front cover and the rear cover of the high-strength closed impeller are lengthened, liquid can be efficiently conveyed to the external liquid collecting pipe in the high-pressure chamber, a gap is reserved between the high-strength closed impeller and the inner wall of the high-pressure chamber, a semi-closed space is formed between the high-strength closed impeller and the inner wall of the high-pressure chamber, a small port of the external liquid collecting pipe is positioned in the semi-closed space, liquid in the high-pressure chamber is conveyed into the external liquid collecting pipe through high-speed rotation of the high-strength closed impeller, the liquid pressure and the liquid flow in the high-pressure chamber are regulated by a throttle valve and a pressure regulating valve, and a check valve for preventing liquid backflow is arranged between the high-pressure chamber and the centrifugal pressurizing chamber.
Further, a high-pressure transition chamber is arranged between the centrifugal pressurizing chamber and the high-pressure chamber and is used for buffering liquid entering the high-pressure chamber.
Further, one end of the fixed shell is provided with a first motor for driving the impeller to rotate, and the other end of the fixed shell is provided with a second motor for driving the high-strength closed impeller to rotate.
Further, one end of the fixed shell, which is close to the second motor, is provided with a high-pressure cavity end cover, the high-pressure cavity end cover is provided with a pressure regulating valve for regulating the internal pressure of the high-pressure cavity, and the pressure regulating valve array is arranged on the high-pressure cavity end cover and used for regulating the internal pressure of the high-pressure cavity, so that the outlet pressure is automatically kept stable.
In summary, compared with the prior art, the beneficial effects of the technical scheme are as follows:
(1) The liquid collecting pipe of the traditional pitot tube pump is in a streamline shape and a flat shape for reducing interference of a convection field, but the liquid collecting pipe is positioned in the pump body and is inevitably used for interfering with a flow field, and the shape of the liquid collecting pipe is unfavorable for expanding pressure; the caliber of the external liquid collecting pipe is set to be 4-20 mm, the roughness Ra of the inner wall of the external liquid collecting pipe is set to be 0.012-0.2 mm, the interference of a flow field is effectively avoided, the flow is greatly increased due to the integral design of the external liquid collecting pipe, the efficient pressurization can be realized, the lift is large, and the working efficiency of the pump is improved;
Pressurizing effect: the velocity and pressure of the fluid may change as it passes through the external header. In some cases, a properly designed header may increase the pressure of the fluid by decreasing the fluid velocity. This boosting effect is typically related to factors such as the flow rate of the liquid, the geometry of the conduit, and the viscosity of the fluid. Under a specific design, the external liquid collecting tube with the caliber of 4mm to 20mm can realize a supercharging effect to a certain extent, and particularly, the external liquid collecting tube is in the field of microfluidics;
avoiding interference with the flow field: the design of the header may affect the flow characteristics of the fluid, including flow velocity distribution, fluid uniformity, and the degree of interference with the flow field. By properly designing the geometry and flow conditions of the header, the interference of the header to the flow field can be reduced, ensuring that fluid can flow stably in the header without creating additional disturbance;
(2) The liquid forms high-pressure beam in the centrifugal pressurizing chamber and enters the high-pressure chamber, the high-pressure beam rotates at high speed through a high-strength closed impeller in the high-pressure chamber to form high-pressure high-speed flow, and the high-pressure high-speed flow enters an external liquid collecting pipe with uniform distribution, so that a working state of high pressure, high flow and low vibration is generated;
(3) The check valve arranged between the centrifugal pressurizing chamber and the high-pressure chamber is used for preventing liquid in the high-pressure chamber from flowing back, so that the stability of a flow field can be effectively ensured, and the pump can work stably.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic view of a second embodiment of the present invention highlighting a drive shaft;
FIG. 5 is a schematic view of an embodiment of the invention highlighting an external header.
Reference numerals illustrate: 1. a second motor; 2. a pressure regulating valve; 3. a throttle valve; 4. a liquid outlet; 5. a fixed housing; 6. a liquid inlet; 7. a transmission shaft I; 8. a first motor; 9. an external liquid collecting pipe; 10. a transmission shaft II; 11. a high strength closed impeller; 12. a first check valve; 13. a secondary impeller; 14. a second stage guide vane; 15. a centrifugal plenum chamber; 16. a high pressure chamber; 17. a high pressure chamber end cap; 18. a primary impeller; 19. a first stage guide vane; 20. a three-stage impeller; 21. three stages of guide vanes; 22. an output port I; 23. an output port II; 24. an output port III; 25. a second check valve; 26. a third check valve; 27. a check valve IV; 28. a semi-enclosed space; 29. a high pressure transition chamber.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
The embodiment of the invention discloses a high-pressure high-lift pump with an external liquid collecting pipe.
Referring to fig. 1-5, a high-pressure high-lift pump with an external liquid collecting pipe comprises a fixed shell 5, wherein a cavity structure is arranged inside the fixed shell 5, a liquid inlet 6 is formed in one end of the fixed shell 5, an external liquid collecting pipe 9 and a liquid outlet 4 are formed in the other end of the fixed shell 5, and the liquid outlet 4 is an outflow opening of a throttle valve 3. The fixed shell 5 is internally provided with a pressurizing mechanism for pressurizing liquid, the pressurizing mechanism is multi-stage type pressurizing, and comprises a centrifugal pressurizing chamber 15 positioned at one end of the liquid inlet 6 and a high-pressure chamber 16 positioned at one end of the external liquid collecting pipe 9. The liquid flows out through the external liquid collecting pipe 9 after being pressurized, the external liquid collecting pipes 9 are arranged in a plurality, and are evenly distributed on the outer side of the fixed shell 5, the orifice of each external liquid collecting pipe 9 is provided with a throttle valve 3 for adjusting the flow rate of the liquid in the external liquid collecting pipe 9, so that the flow is greatly increased, and the vibration of a pump body is avoided.
The caliber of the external liquid collecting pipe 9 is 4 mm-20 mm.
The roughness Ra of the inner wall of the external liquid collecting pipe 9 is 0.012 mm-0.2 mm.
The external liquid collecting pipe 9 has a circular cross-sectional shape. The diameter of the external liquid collecting tube 9 gradually increases from the end close to the fixed housing 5 to the end far from the fixed housing 5. The small port of the external liquid collecting tube 9 is arranged in the fixed shell 5 and in a semi-closed space 28 formed between the high-strength closed impeller 11 and the inner wall of the high-pressure chamber 16, most of the external liquid collecting tube 9 is arranged outside the fixed shell 5, the internal volume of the external liquid collecting tube 9 is small, the interference of the external liquid collecting tube 9 to a flow field is effectively reduced, and the vibration and cavitation phenomena of the external liquid collecting tube 9 are restrained. The liquid will form a high pressure in the external header 9, and the external header 9 will be able to discharge a high pressure and high velocity flow. Because the external liquid collecting pipe 9 is uniformly distributed, the flow rate of the pump is greatly increased compared with that of a traditional rotary shell pump.
1. Reducing fluid pressure loss: when fluid passes through the external header 9, pressure loss occurs due to friction. By gradually expanding the diameter of the external header 9, the velocity of the fluid can be reduced, reducing friction losses and thus pressure losses in the fluid system.
2. Reducing the flow rate: as the diameter of the external header 9 increases, the flow rate of the fluid decreases. This may be beneficial for some applications, particularly where it is desired to reduce the pressure inside the pipe or to control the fluid velocity.
3. Reducing fluid noise: the high velocity flow of fluid through the external header 9 may produce noise. By gradually expanding the diameter of the externally positioned header, the velocity of the fluid may be reduced, thereby reducing noise generated by the fluid system.
4. Improving fluid uniformity: in some cases, particularly in liquid mixing or dispensing applications, the gradual expansion of the tube diameter can help improve the uniformity of the fluid, ensuring that the fluid flows and mixes uniformly in the tube.
5. Reducing pipe vibration and pressure pulsation: by gradually expanding the diameter of the external header 9, fluctuations in fluid and pressure pulsations in the external header 9 can be reduced, thereby reducing vibration and noise levels of the piping system.
Each external liquid collecting pipe 9 is provided with a throttle valve 3, and the throttle valve 3 is used for adjusting the flow rate of liquid in each external liquid collecting pipe 9 and can be matched with the pressure regulating valve 2 to adjust, so that the working efficiency of the pump is improved.
The external liquid collecting pipe 9 inside the high-pressure chamber 16 is provided with a small volume, the pipe body of the external liquid collecting pipe 9 and the fixed shell 5 are integrated, and only a small part is exposed inside the high-pressure chamber 16, so that the interference flow field is reduced.
The centrifugal pressurizing chamber 15 is provided with a multi-stage impeller, a driving mechanism of the impeller is a first motor 8, and the first motor 8 drives the impeller to rotate through a first transmission shaft 7. The multistage impeller comprises three stages, namely a first-stage impeller 18, a second-stage impeller 13 and a third-stage impeller 20 in sequence from one end close to the first motor 8 to one end far away from the first motor 8. Centrifugal force is generated through the operation of the primary impeller 18 so as to suck liquid into the centrifugal pressurizing chamber 15 through the liquid inlet 6 for preliminary pressurizing, and guide vanes for reducing the flow velocity of the liquid are arranged at the rear side of the impeller, namely a primary guide vane 19, a secondary guide vane 14 and a tertiary guide vane 21.
The impeller operates to generate centrifugal force, liquid is sucked into the centrifugal pressurizing chamber 15 through the inlet end to be primarily pressurized, effective high pressure is provided for the high pressure chamber 16, and high pressure output is ensured. The liquid is sucked under the action of centrifugal force of the impeller, and continuously flows in under the action of the impeller by the continuous rotation of the impeller, the flow speed is reduced by the guide vane after the liquid flows out of the impeller, and part of speed energy heads are converted into pressure energy heads and then are uniformly introduced into the next stage.
A high pressure transition chamber 29 is provided between the centrifugal plenum chamber 15 and the high pressure chamber 16 for buffering liquid entering the high pressure chamber 16.
The high-pressure chamber 16 is provided with a high-strength shrouded impeller 11, and the rotation of the high-strength shrouded impeller 11 is driven by the second motor 1. A gap is reserved between the high-strength closed impeller 11 and the inner wall of the high-pressure chamber 16, liquid in the high-pressure chamber 16 is sent into the external liquid collecting pipe 9 through rotation of the high-strength closed impeller 11, and the external liquid collecting pipe 9 is arranged in a semi-closed space 28 formed by the high-strength closed impeller 11 and the inner wall of the high-pressure chamber 16, so that high-pressure liquid can be efficiently received, as shown in fig. 2 and 3. A check valve for preventing liquid from flowing back is provided between the high-pressure chamber 16 and the centrifugal pressurizing chamber 15. The high-strength closed impeller 11 is different from the common closed impeller in arrangement, and the front cover and the rear cover of the high-strength closed impeller 11 are lengthened, so that the liquid can be efficiently conveyed for the external liquid collecting pipe 9 in the high-pressure chamber 16.
The liquid completes preliminary pressurization in the centrifugal pressurization chamber 15, the flow speed is reduced through the three-stage guide vanes 21, part of the speed energy head is converted into pressure energy head, and then the pressure energy head is uniformly introduced into the check valves, and four check valves are uniformly arranged along the circumference of the high-pressure chamber 16, namely a first check valve 12, a second check valve 25, a third check valve 26 and a fourth check valve 27. The high-pressure transition chamber 29 is unidirectionally introduced through the check valve, liquid is buffered inside the high-pressure transition chamber 29, and then the liquid is introduced into the high-pressure chamber 16 by the high-speed operation of the high-strength closed impeller 11. Most of the liquid in the high-pressure chamber 16 is directly sent into the external liquid collecting pipe 9 through the high-speed rotation of the high-strength closed impeller 11, and meanwhile, part of the liquid enters the high-pressure chamber 16 through a gap between the high-strength closed impeller 11 and the inner wall of the high-pressure chamber 16, so that the pressure of the liquid in the high-pressure chamber 16 can be regulated conveniently.
The liquid flows into the high pressure chamber 16 through the high strength closed impeller 11, and the liquid entering the high pressure chamber 16 maintains a stable flow field, and the liquid does not flow back because of the check valve between the centrifugal plenum chamber 15 and the high pressure transition chamber 29. The second motor 1 drives the high-strength closed impeller 11 to rotate through the transmission shaft II 10. After the liquid is introduced into the high-strength closed impeller 11 through the check valve, the liquid enters the external liquid collecting pipe 9 under the action of the high-speed rotating blades, so that high-pressure and high-speed flow is formed.
The fixed shell 5 is close to the one end of second motor 1 and is equipped with high-pressure chamber end cover 17, be equipped with the air-vent valve 2 that is used for adjusting high-pressure chamber 16 internal pressure on the high-pressure chamber end cover 17, air-vent valve 2 evenly is provided with three along the circumference of high-pressure chamber end cover 17, corresponds three delivery outlet respectively, is established to delivery outlet one 22, delivery outlet two 23 and delivery outlet three 24.
When liquid enters the high-pressure chamber 16, the pressure regulating valve 2 on the high-pressure chamber end cover 17 can act, the pressure regulating valve 2 is used for regulating the pressure inside the high-pressure chamber 16, and after the liquid enters the high-pressure chamber 16, the pressure inside the high-pressure chamber 16 can be regulated through the pressure regulating valve 2 according to actual conditions, so that the working efficiency is prevented from being influenced by the excessive pressure, and the pump body is prevented from being damaged.
After being regulated by the pressure regulating valve 2, the liquid in the high-pressure chamber 16 is conveyed into the external liquid collecting pipe 9 through the high-strength closed impeller 11. The external liquid collecting pipe 9 is in a gradually enlarged pipe body, liquid can form high pressure in the external liquid collecting pipe 9, and the external liquid collecting pipe 9 can discharge high-pressure high-speed flow. Because the external liquid collecting pipe 9 is uniformly distributed, the flow rate of the pump is greatly increased compared with that of a traditional rotary shell pump.
The centrifugal pressurizing chamber 15 is used for delivering high-pressure liquid into the high-strength closed impeller 11 for pressurizing again and then delivering the high-pressure liquid to the high-pressure chamber 16, at the moment, the fluid in the high-pressure chamber 16 is in a high-speed flowing state, and in order to ensure stable operation, the pressure in the high-pressure chamber 16 can be regulated through the pressure regulating valve 2, meanwhile, the flow is controlled by the regulating throttle valve 3, and the pressure regulating valve 2 is matched with the throttle valve 3 for use, so that the stability of the fluid in the high-pressure chamber 16 is ensured.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a high-pressure high-lift pump with an external liquid collecting pipe, includes fixed casing (5), its characterized in that: the utility model discloses a liquid collecting device, including fixed casing (5), external liquid collecting pipe (9), pressure boost mechanism, multistage impeller formula pressure boost is carried out to the liquid to be equipped with in fixed casing (5), the one end of fixed casing (5) is equipped with inlet (6), the other end of fixed casing (5) is equipped with external liquid collecting pipe (9), and liquid flows through external liquid collecting pipe (9) after the pressure boost mechanism pressure boost, external liquid collecting pipe (9) set up a plurality ofly, a plurality of external liquid collecting pipes (9) evenly distributed are in fixed casing (5) outside.
2. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 1, wherein: the caliber of the external liquid collecting pipe (9) is 4 mm-20 mm.
3. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 1, wherein: the surface roughness Ra of the inner wall of the external liquid collecting pipe (9) is 0.012 mm-0.2 mm.
4. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 1, wherein: the cross-section shape of the external liquid collecting pipe (9) is circular, and a throttle valve (3) is arranged at the pipe orifice of the external liquid collecting pipe (9) and used for increasing flow and avoiding pump body vibration.
5. The high pressure high lift pump with an external liquid collecting pipe according to any one of claims 1-4, wherein: the diameter of the external liquid collecting pipe (9) gradually increases from one end close to the fixed shell (5) to one end far away from the fixed shell (5), and a small port of the external liquid collecting pipe (9) is arranged in the fixed shell (5).
6. The high-pressure high-lift pump with an external liquid collecting pipe as claimed in claim 5, wherein: the pressurizing mechanism comprises a centrifugal pressurizing chamber (15) positioned at one end of the liquid inlet (6), the centrifugal pressurizing chamber (15) is provided with a multi-stage impeller, centrifugal force is generated through operation of the impeller, liquid is sucked into the centrifugal pressurizing chamber (15) through the liquid inlet (6) to be primarily pressurized, and a guide vane for reducing the flow rate of the liquid is arranged on one side, far away from the liquid inlet (6), of the impeller.
7. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 6, wherein: the supercharging mechanism further comprises a high-pressure chamber (16) located at one end of the external liquid collecting pipe (9), the high-pressure chamber (16) is provided with a high-strength closed impeller (11), a gap is reserved between the high-strength closed impeller (11) and the inner wall of the high-pressure chamber (16), a semi-closed space (28) is formed between the high-strength closed impeller (11) and the inner wall of the high-pressure chamber (16), a small port of the external liquid collecting pipe (9) is located in the semi-closed space (28), liquid in the high-pressure chamber (16) is fed into the external liquid collecting pipe (9) through high-speed rotation of the high-strength closed impeller (11), and a check valve for preventing liquid backflow is arranged between the high-pressure chamber (16) and the centrifugal supercharging chamber (15).
8. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 7, wherein: a high-pressure transition chamber (29) is arranged between the centrifugal pressurizing chamber (15) and the high-pressure chamber (16) and is used for buffering liquid entering the high-pressure chamber (16).
9. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 7, wherein: one end of the fixed shell (5) is provided with a first motor (8) for driving the impeller to rotate, and the other end of the fixed shell (5) is provided with a second motor (1) for driving the high-strength closed impeller (11) to rotate.
10. The high pressure high lift pump with an external liquid collecting pipe as claimed in claim 9, wherein: the one end that fixed casing (5) is close to second motor (1) is equipped with high-pressure chamber end cover (17), be equipped with air-vent valve (2) on high-pressure chamber end cover (17), air-vent valve (2) array setting is on high-pressure chamber end cover (17) for adjust high-pressure chamber (16) internal pressure, make the export pressure keep stable automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410383854.6A CN117967579B (en) | 2024-04-01 | 2024-04-01 | High-pressure high-lift pump with external liquid collecting pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410383854.6A CN117967579B (en) | 2024-04-01 | 2024-04-01 | High-pressure high-lift pump with external liquid collecting pipe |
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| CN117967579A true CN117967579A (en) | 2024-05-03 |
| CN117967579B CN117967579B (en) | 2024-06-11 |
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2024
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| EP0664398A1 (en) * | 1994-01-21 | 1995-07-26 | WILO GmbH | Centrifugal pump with backflow prevention valve |
| EP1431584A2 (en) * | 2002-12-18 | 2004-06-23 | Bogemar, S.L. | Multi-stage electric pump |
| CN103133352A (en) * | 2011-11-22 | 2013-06-05 | 上海连成（集团）有限公司 | Novel structure of self-suction horizontal-type multi-stage pump |
| CN102734174A (en) * | 2012-07-05 | 2012-10-17 | 南京工业大学 | Double-stage double-discharge graphite pump |
| CN203430802U (en) * | 2013-06-29 | 2014-02-12 | 湖南腾煌水泵有限公司 | Multistage small submersible electric pump with check valve |
| EP3276180A1 (en) * | 2015-03-24 | 2018-01-31 | Ebara Corporation | Pump |
| CN207437428U (en) * | 2017-08-02 | 2018-06-01 | 汪小艳 | A kind of combined elastic sealing device for improving water pump efficiency |
| CN217712967U (en) * | 2022-05-06 | 2022-11-01 | 江苏海狮泵业制造有限公司 | Efficient and stable horizontal split two-stage pump |
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