CN216894919U - First-stage double-suction impeller structure for multi-stage pump - Google Patents
First-stage double-suction impeller structure for multi-stage pump Download PDFInfo
- Publication number
- CN216894919U CN216894919U CN202220406384.7U CN202220406384U CN216894919U CN 216894919 U CN216894919 U CN 216894919U CN 202220406384 U CN202220406384 U CN 202220406384U CN 216894919 U CN216894919 U CN 216894919U
- Authority
- CN
- China
- Prior art keywords
- impeller
- stage
- pump
- guide vane
- box body
- 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.)
- Active
Links
Images
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The first-stage double-suction impeller structure for the multistage pump is characterized in that cavitation of the pump is reduced, the service life of an impeller is prolonged, and the maintenance cost of the pump is reduced; the second-stage guide vane is fixed on the shaft through a spline, and an impeller is arranged between the first-stage guide vane and the second-stage guide vane. The application has the advantages that: reduce pump cavitation, improve the life of impeller, reduce the cost of maintenance of pump.
Description
Technical Field
The application relates to the technical field of multistage pumps, in particular to a first-stage double-suction impeller structure for a multistage pump.
Background
The demand for the centrifugal pump is increased along with the continuous lifting and capacity expansion of the devices in the fields of medium petrochemicals, medium petroleum, power stations (including nuclear power stations), steel enterprises and the like, the performance cost requirement of the pump is increased, the pump needs to be stable in operation, the fault rate is low, the maintenance is simple, convenient and quick, the service life is long, and the factor influencing the service life of the pump is that the pump impeller suction inlet is easy to generate cavitation.
In operation, if the absolute pressure of the pumped liquid drops for some reason in a localized region of the flow-through portion (typically somewhere after the inlet of the impeller vanes) to the liquid vaporization pressure at the prevailing temperature, the liquid begins to vaporize there, producing a large amount of vapor, forming bubbles, and as the liquid containing a large amount of bubbles progresses through the high pressure region within the impeller, the high pressure liquid surrounding the bubbles causes the bubbles to shrink sharply to collapse. When the bubble is condensed and broken, the liquid particle fills the cavity at a high speed, a strong water hammer effect is generated at the moment, the impact stress on the surface of the metal can reach hundreds to thousands of atmospheric pressures at a high impact frequency, the impact frequency can reach tens of thousands of times per second, and the wall thickness can be punctured seriously. The multi-stage centrifugal pump always has overlarge flow, so that cavitation at the suction inlet of the impeller is larger, after cavitation is generated in the water pump, the pump can not only damage a flow passage component, but also generate noise and vibration, the performance of the pump is reduced, and liquid in the pump is interrupted in severe cases and cannot work normally.
In order to reduce pump cavitation (1), an inducer (2) is added in front of an impeller to increase the inlet pressure of the water pump.
Disadvantages of the prior art
1) An inducer is added in front of the impeller: the inducer has high precision, large processing difficulty and high cost.
2) Increasing the pressure at the inlet of the water pump: the booster pump is arranged at the inlet, so that the cost is too high; or increasing the deaerator height at the inlet, this approach is limited by installation environmental concerns.
The problem that this application will be solved reduces pump cavitation, improves the life of impeller, reduces the cost of maintenance of pump.
Disclosure of Invention
The utility model aims at providing a first level double suction impeller structure for multistage pump.
The purpose of the application is realized by the following steps: the suction section, the driving section sealing box body and the suction box body are welded together to form a driving section assembly, the driving section assembly is fixedly connected with the pump shell, a water baffle is arranged in the driving sealing box body, the top end of the driving sealing box body is provided with a flow dividing port, the flow dividing port is welded together with a flow guide plate, an impeller is arranged below the flow guide plate, a first-stage guide vane is arranged behind the impeller, and the first-stage guide vane is fixed on the shaft through a spline; the second-stage guide vane is fixed on the shaft through a spline, and an impeller is arranged between the first-stage guide vane and the second-stage guide vane.
The application has the advantages that:
reduce pump cavitation, improve the life of impeller, reduce the cost of maintenance of pump.
Drawings
Fig. 1 is a schematic diagram of the structure of the present application.
Detailed Description
Referring to fig. 1, a driving section assembly is formed by welding a driving section 1, a driving section sealing box body 8 and a suction box body 6 together, the driving section assembly is fixedly connected with a pump shell 9, a water baffle 2 is arranged in the driving sealing box body, a flow dividing port is arranged at the top end of the driving sealing box body and is welded with a flow guide plate 3 together, an impeller 4 is arranged below the flow guide plate, a first-stage guide vane 5 is arranged behind the impeller, and the first-stage guide vane is fixed on a shaft 8 through a spline; the second-stage guide vane 7 is fixed on the shaft through a spline, and an impeller is arranged between the first-stage guide vane and the second-stage guide vane. The original single first-stage impeller is changed into two first-stage impellers, overlarge flow uniformly enters the impellers (the areas of the positions A and B are the same) through the A and B double channels, the flow channel A is formed by enabling liquid to pass through a guide plate-the first impeller-a first-stage guide vane-an intake box-C, and the flow channel B is formed by enabling liquid to pass through the intake box-the second impeller-a second-stage guide vane-C. The converged liquid second-stage guide vane back blade enters the next stage. This configuration results in a reduced flow into the impeller and a slower flow rate relative to a single impeller. Cavitation at the suction inlet of the pump impeller is reduced.
Claims (1)
1. First-stage double suction impeller structure for multi-stage pump, it includes: inhale section, breakwater, guide plate, impeller, one-level stator, inhale letter body, second grade stator, drive end seal letter body, characterized by: the suction section, the driving section sealing box body and the suction box body are welded together to form a driving section assembly, the driving section assembly is fixedly connected with the pump shell, a water baffle is arranged in the driving sealing box body, the top end of the driving sealing box body is provided with a flow dividing port, the flow dividing port is welded together with a flow guide plate, an impeller is arranged below the flow guide plate, a first-stage guide vane is arranged behind the impeller, and the first-stage guide vane is fixed on the shaft through a spline; the second-stage guide vane is fixed on the shaft through a spline, and an impeller is arranged between the first-stage guide vane and the second-stage guide vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220406384.7U CN216894919U (en) | 2022-02-28 | 2022-02-28 | First-stage double-suction impeller structure for multi-stage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220406384.7U CN216894919U (en) | 2022-02-28 | 2022-02-28 | First-stage double-suction impeller structure for multi-stage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216894919U true CN216894919U (en) | 2022-07-05 |
Family
ID=82187501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220406384.7U Active CN216894919U (en) | 2022-02-28 | 2022-02-28 | First-stage double-suction impeller structure for multi-stage pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216894919U (en) |
-
2022
- 2022-02-28 CN CN202220406384.7U patent/CN216894919U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101846085B (en) | Frequency conversion high-speed wet type submersible pump | |
| CN101012838A (en) | Centrifugal compressor having vane jet orifice | |
| CN110657125A (en) | Method for improving cavitation resistance of impeller | |
| CN216894919U (en) | First-stage double-suction impeller structure for multi-stage pump | |
| CN201265550Y (en) | Centrifugal pump with ultra-low specific speed | |
| CN106762854A (en) | A kind of anti-cavitation double feed inlet double-suction multi-stage pump | |
| CN209195729U (en) | A kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump | |
| CN209724682U (en) | A kind of high-cavitation-resistance energy centrifugal multistage pump multiple centrifugal pump with inducer | |
| NL2028928B1 (en) | Multistage centrifugal booster pump | |
| CN2530072Y (en) | Centrifugal pump | |
| CN112096617B (en) | Vertical self-priming pump | |
| CN112196827A (en) | Anti-cavitation water pump | |
| CN212615392U (en) | Supercharging device for improving cavitation resistance of MD type multistage centrifugal pump | |
| CN212898991U (en) | Novel high-efficient double suction self priming pump | |
| CN210461195U (en) | Low-noise injection pump | |
| CN103835987A (en) | Low-temperature deep-well pump | |
| CN215980093U (en) | Amphibious water pump impeller | |
| CN101021215A (en) | Round-disc through-hole ultra low ratio rotary speed centrifugal pump | |
| CN213808107U (en) | Vertical double-channel volute self-priming pump | |
| RU2361117C1 (en) | Multistage centrifugal pump | |
| CN213116712U (en) | Anti-cavitation vertical multistage centrifugal pump | |
| CN213511342U (en) | Anti-cavitation water pump | |
| CN220452298U (en) | High-efficiency energy-saving horizontal self-priming split pump | |
| CN210769550U (en) | Anti-cavitation centrifugal pump | |
| CN215719527U (en) | Water pump for conveying condensed water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |