CN115388010A - Vertical double-suction pump with suction chamber hydraulic structure and design method - Google Patents
Vertical double-suction pump with suction chamber hydraulic structure and design method Download PDFInfo
- Publication number
- CN115388010A CN115388010A CN202210751852.9A CN202210751852A CN115388010A CN 115388010 A CN115388010 A CN 115388010A CN 202210751852 A CN202210751852 A CN 202210751852A CN 115388010 A CN115388010 A CN 115388010A
- Authority
- CN
- China
- Prior art keywords
- pump
- suction chamber
- suction
- inlet
- pump 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.)
- Pending
Links
Images
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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction 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
- 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
-
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a vertical double-suction pump of a suction chamber hydraulic structure and a design method thereof, wherein the vertical double-suction pump comprises a motor, a clamping shell coupling, a bracket, a mechanical seal, a pump body, a pump cover, a machine seal flushing pipe, an impeller, a guide bearing and a pump shaft, wherein a guide plate is arranged at the inlet of a pump body suction chamber of the pump body, the guide plate is provided with a guide cone at the upper and lower suction chambers, the lower end of the pump body is provided with the guide bearing and a bearing retaining sleeve for radially supporting the lower end of the pump shaft, and water is introduced from the machine seal flushing pipe at the outlet of the pump body to wash and cool the guide bearing. The invention designs a flow guide plate at the inlet of the suction chamber, and designs flow guide cones in the upper and lower suction chambers to improve the flow state of the suction chamber; the initial position of the guide plate of the suction chamber is positioned between the inlet of the pump body and the side wall of the volute, and the head part of the guide plate is rounded, so that the impact loss of incoming flow is reduced; the upper and lower streamline of the guide plate at the inlet of the suction chamber are both arc lines, and the arc lines are tangent with the outer wall of the volute, so that smooth transition is ensured.
Description
Technical Field
The invention relates to a vertical double-suction pump and a design method thereof, in particular to a vertical double-suction pump with a suction chamber hydraulic structure, which has excellent flow guide performance and uniform flow field distribution of a suction chamber of a pump body of the double-suction pump, and a design method thereof.
Background
The vertical double-suction pump is widely applied to industries such as building, tap water plants, power plants, steel plants, air-conditioning circulating water, water conservancy projects, irrigation areas and the like. Double suction pumps are actually made up of two back-to-back impellers, the water flowing from the impellers merging into a volute. The single-suction impeller with the same diameter works simultaneously, and the flow can be doubled under the same impeller outer diameter; meanwhile, the inlet and the outlet of the double suction pump are in the same direction and are perpendicular to the pump shaft, so that the arrangement and the installation of the pump and the water inlet and outlet pipes are facilitated. The method is characterized by large flow, high efficiency and excellent cavitation performance; because the impeller structure of the double suction pump is symmetrical, the axial force is completely offset theoretically, the operation is stable, the reliability is strong, and the overhaul is convenient.
The suction chamber refers to an overflowing part from a flange of the pump inlet to an inlet of the impeller, liquid is guided into the impeller according to required conditions, the flowing state of a fluid medium in the suction chamber directly influences the flowing condition in the impeller, certain influence is exerted on the efficiency of the pump, and particularly, the cavitation performance of the pump is greatly influenced. In view of the fact that the requirements of various industries on energy conservation and emission reduction are higher and higher under the double-carbon background of the current country, energy conservation and consumption reduction are attempted in a manner of thinking, so that the double-suction pump also needs to improve the efficiency of the water pump, and the fully symmetrical quasi-spiral suction chamber structure of the pump body of the double-suction pump can improve the flow state of the inlet of the double-suction pump, thereby reducing the hydraulic loss, improving the efficiency of the double-suction pump and achieving the purpose of energy conservation.
Disclosure of Invention
In view of the above problems, the present invention provides a vertical double suction pump with a suction chamber hydraulic structure having excellent flow guiding performance and uniform flow field distribution in the suction chamber of the pump body of the double suction pump, and a design method thereof.
The invention solves the technical problems through the following technical scheme: a vertical double suction pump of a suction chamber hydraulic structure, comprising: the pump comprises a motor, a clamping shell coupling, a support, a mechanical seal, a pump body, a pump cover, a mechanical seal flushing pipe, an impeller, a guide bearing and a pump shaft.
The motor is connected with the pump body through a rigid clamping shell coupler, and the outer part of the integral structure of the vertical double-suction pump body of the suction chamber hydraulic structure is sequentially connected with the pump body, the pump cover, the bracket and the motor from bottom to top; the inlet of the pump body suction chamber of the pump body is provided with a guide plate, the guide plate is provided with guide cones in the upper and lower suction chambers, the lower end of the pump body is provided with a guide bearing and a bearing retaining sleeve for radially supporting the lower end of the pump shaft, and the guide bearing is washed and cooled by water introduced from a machine seal flushing pipe at the outlet of the pump body.
In the embodiment of the invention, the starting position of the guide plate is positioned between the inlet of the pump body and the side wall of the volute, the head part is rounded, and the upper streamline and the lower streamline of the guide plate at the inlet of the suction chamber are both arc lines which are tangent to the outer wall of the volute.
In an embodiment of the invention, the pump cover and the pump body are in spigot fit positioning and are provided with an O-shaped ring seal.
In the embodiment of the invention, the pump cover is matched with the bracket through a stop opening, and the pump body, the pump cover and the motor are connected and fastened through a stud, a nut and a gasket.
In the embodiment of the invention, the support is matched with the front opening of the motor and is fastened by a bolt and nut assembly, and the motor support is provided with an operation window.
In the specific implementation example of the invention, the pump shaft and the coupling, the pump shaft and the impeller are connected in a key transmission way; the mechanical seal is arranged on the end face of the outer side of the pump cover.
In an embodiment of the invention, the impeller is fixed to the pump body by an impeller lock nut.
A design method of a vertical double suction pump of a suction chamber hydraulic structure comprises the following steps:
the first step is as follows: determining the suction chamber inlet diameter:
suction chamber inlet diameter Ds = 1.1-1.3D j The flow speed of the suction inlet is ensured to be 2.5-3.5m/s; wherein D j Is the diameter of the impeller inlet;
the second step is that: the change rule of the area of the inlet channel of the suction chamber is as follows:
the flow area is uniformly increased from the inlet to the throat; the area of the quasi-spiral contraction section is uniformly reduced; wherein S A-A ＝1.2～1.4S 0-0 ；S A-A Is the area of the maximum, S 0-0 Is the area where the minimum is located,
the third step: calculating the section area of the suction chamber:
the double suction pump water inlet flow passage is symmetrically divided into two parts near the volute, when the liquid flows through the section of the water suction chamber, a part of the liquid enters the impeller, the area of the section is divided into four sections from large to small, and the average flow speed of the liquid on each section is V = 0.7-0.85V j Calculation of where V j Is the impeller inlet flow rate;
half of the flow passes through the largest cross section in the half-spiral shape, and since the suction is completely symmetrical, the area of the section B is:
wherein Q is the pump flow;
the other cross-sectional areas are reduced in proportion to the maximum area:
the fourth step: the flow passage from the inlet of the pump to the quasi-spiral part is designed to be in a shape, all the cross sections are connected smoothly, and the cross section shape and the area size are adjusted, so that the area from the cross section at the minimum position to the cross section at the maximum position is increased uniformly.
The positive progress effects of the invention are as follows: the invention provides a vertical double-suction pump body of a suction chamber hydraulic structure.A guide plate is designed at an inlet of an inlet chamber, and guide cones are designed in an upper suction chamber and a lower suction chamber to improve the flow state of the suction chamber; the initial position of the guide plate of the suction chamber is positioned between the inlet of the pump body and the side wall of the volute, and the head part of the guide plate is rounded, so that the impact loss of incoming flow is reduced; the upper and lower streamline of the guide plate at the inlet of the suction chamber are both arc lines, and the arc lines are tangent with the outer wall of the volute, so that smooth transition is ensured.
The cross section flow area is reduced from large to small, so that the flow velocity of each cross section is ensured to be close, the flow condition is improved, and the fluid medium is ensured to uniformly enter the impeller.
The hydraulic power of the suction chamber is of a completely symmetrical quasi-spiral structure, and is absolutely symmetrical up and down, left and right, so that the flow state symmetry of fluid media is ensured, and the hydraulic loss is small.
Drawings
Fig. 1 is a sectional view showing an overall structure of the present invention.
FIG. 2 is a cross-sectional view of a front view of the pump body of the present invention.
FIG. 3 is a cross-sectional view of a top view of the pump body of the present invention.
FIG. 4 is a cross-sectional view of a right side view of the pump body of the present invention.
Fig. 5 is a hydraulic diagram of the pump body suction chamber of the present invention.
The following are the names corresponding to the reference numbers in the invention:
in the figure: the pump comprises a motor 1, a coupling 2, a support 3, a mechanical seal 4, a pump body 5, a pump cover 6, a mechanical seal flushing pipeline 7, an impeller 8, a sealing ring 9, an impeller locking nut 10, a guide bearing 11, a pump shaft 12, a guide plate 13, a guide cone 14, a pump body suction chamber 15, a pump body upper suction chamber 151, a pump body lower suction chamber 152 and a volute 16.
Detailed Description
The following provides a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a sectional view showing an overall structural view of the present invention, fig. 2 is a sectional view showing a front view of a pump body of the present invention, fig. 3 is a sectional view showing a plan view of the pump body of the present invention, and fig. 4 is a sectional view showing a right side view of the pump body of the present invention. As shown in fig. 1-4: the invention provides a vertical double-suction pump of a suction chamber hydraulic structure, which comprises: the pump comprises a motor 1, a clamping shell coupling 2, a support 3, a mechanical seal 4, a pump body 5, a pump cover 6 and a mechanical seal, wherein the mechanical seal flushing pipe 7, an impeller 8, a sealing ring 9, an impeller locking nut 10, a guide bearing 11 and a pump shaft 12 are mechanically sealed, the motor 1 is connected with the pump body 5 through the rigid clamping shell coupling 2, the outside of the integral structure of the vertical double-suction pump body of the suction chamber hydraulic structure is sequentially connected from bottom to top through the pump body, the pump cover, the support and the motor, a guide plate 13 is arranged at the inlet of a suction chamber of the pump body 5, and the guide plate is provided with a guide cone 14 in the upper and lower suction chambers.
The upper and lower flow lines of the diversion cone 14 are both arc lines, and the arc lines are tangent to the outer wall of the volute 16. The water firstly flows to the streamline diversion cone and then flows along the shape, and cannot directly impact the volute.
The utility model discloses there is the guide plate in pump body suction chamber 15 entry design, and there is the water conservancy diversion awl at the internal design of suction chamber 151, 152 from top to bottom, improves the flow state of suction chamber.
Because the rigid coupling connection is adopted, a motor shaft is a pump shaft, the pump has no independent bearing part, and the axial force and the radial force are borne by the motor, the motor is processed according to a motor shaft extension diagram on the basis of a standard motor. The motor is connected with the pump through a rigid clamping shell coupling. The exterior of the integral structure is sequentially connected with a pump body, a pump cover, a bracket and a motor. The pump cover and the pump body are positioned in a matching way through a spigot and are provided with an O-shaped ring seal; the pump cover is matched with the support through a stop opening, and the pump body, the pump cover and the motor are connected and fastened through a stud, a nut and a gasket. The support and the motor are matched at a stop opening and are fastened through a bolt and nut assembly, and the motor support is provided with an operation window, so that parts such as mechanical seal and the like can be assembled and disassembled on the window. The connecting shaft and the coupling, the shaft and the impeller are driven through keys, and the mechanical seal is arranged on the end face of the outer side of the pump cover; an external flushing pipeline is arranged. The lower end of the pump body is provided with a guide bearing and a bearing retaining sleeve for radially supporting the lower end of the pump shaft, and water is introduced from the outlet of the pump body to wash and cool the guide bearing.
2-4 are pump body and pump cover assemblies of vertical double suction pump of suction chamber hydraulic structure, it can be seen from the figure that the initial position of the inlet flow distribution plate of the suction chamber is located between the inlet of the pump body and the side wall of the volute, and the head is rounded, so as to reduce the impact loss of the incoming flow; the lower flow lines of the flow distribution plate at the inlet of the suction chamber are all arc lines, and the arc lines are tangent to the outer wall of the volute, so that smooth transition is ensured.
The invention also provides a design method of the vertical double-suction pump of the suction chamber hydraulic structure, which comprises the following steps:
the first step is as follows: determining the suction chamber inlet diameter: suction chamber inlet diameter Ds = 1.1-1.3D j The flow speed of the suction inlet is ensured to be about 3 m/s; wherein D j Is the impeller inlet diameter;
the second step is that: the change rule of the area of the inlet channel of the suction chamber is as follows:
the flow area is uniformly increased from the inlet to the throat (from the section 0-0 to the section A-A in the attached figure 5); the area of the quasi-spiral contraction section is uniformly reduced (the section A-D in the attached figure 5), and the area of the section A-A is the largest; wherein S A-A ＝1.2～1.4S 0-0 ；
The third step: calculating the section area of the suction chamber:
the double suction pump inlet flow passage is symmetrically divided into two parts near the volute, when the liquid flows through the section of the water suction chamber, a part of the liquid enters the impeller, the section area is divided into 4 sections (A-D in the attached figure 5) from large to small, and the average flow speed of the liquid of each section is V = 0.7-0.85V j Calculation of where V j Is the impeller inlet flow rate;
theoretically, it is believed that half of the flow passes through the largest cross-section in the semi-spiral shape (i.e., cross-section B in fig. 5), and the area of cross-section B is:
wherein Q is the pump flow;
the other cross-sectional areas are reduced in proportion to the maximum area:
the fourth step: the flow passage from the pump inlet to the quasi-spiral part is designed to be inbase:Sub>A smooth connection with each section, and the section shape and the area size are adjusted to ensure that the section from 0-0 to A-A is uniformly increased and the section from A-A to B-B is uniformly reduced.
FIG. 5 is a diagram of the novel suction chamber, wherein the trend of the change of the overflowing area of the suction chamber is that the overflowing area is increased firstly and then reduced; the flow area increases from the inlet of the suction chamber to the throat part (0-0 to A-A part), thereby reducing the flow speed and the resistance loss along the way; the section from the throat part of the suction chamber to the partition tongue (A to D part of the section) is in a quasi-spiral shape, and in view of the fact that a part of liquid enters the impeller in advance when the liquid medium flows through the section of the suction chamber, the section flow area of the quasi-spiral part is reduced uniformly from large to small, the flow velocity of each section is ensured to be close, the flow condition is improved, and the fluid medium is ensured to uniformly enter the impeller.
As can be seen from figure 5, the water power of the suction chamber is of a completely symmetrical quasi-spiral structure, and is absolutely symmetrical up and down, left and right, so that the flow state of the fluid medium is ensured to be symmetrical, and the water power loss is small.
The flow lines of the suction chamber are uniformly distributed, the flow lines in the upper direction, the lower direction, the left direction and the right direction are basically symmetrical, no obvious vortex exists, the flow state is good, and the flow loss is small.
Through the design, the pump body suction chamber 15 of the double suction pump has the advantages of small hydraulic loss, good fluidity, uniform and symmetrical flow state, high efficiency and the like, so that the efficiency of the double suction pump is improved, and the aim of saving energy is fulfilled.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a vertical double entry pump of suction chamber hydraulic structure which characterized in that: the vertical double suction pump of the suction chamber hydraulic structure comprises: a motor, a clamping shell coupling, a bracket, a mechanical seal, a pump body, a pump cover, a mechanical seal flushing pipe, an impeller, a guide bearing and a pump shaft,
the motor is connected with the pump body through a rigid clamping shell coupler, and the outer part of the integral structure of the vertical double-suction pump body of the suction chamber hydraulic structure is sequentially connected with the pump body, the pump cover, the bracket and the motor from bottom to top; the inlet of the pump body suction chamber of the pump body is provided with a guide plate, the guide plate is provided with guide cones in the upper and lower suction chambers, the lower end of the pump body is provided with a guide bearing and a bearing retaining sleeve for radially supporting the lower end of the pump shaft, and the guide bearing is washed and cooled by water introduced from a machine seal flushing pipe at the outlet of the pump body.
2. The vertical double suction pump of suction chamber hydraulic configuration as claimed in claim 1, characterized in that: the initial position of the guide plate is positioned between the inlet of the pump body and the side wall of the volute, the head of the guide plate is rounded, the upper streamline and the lower streamline of the guide plate at the inlet of the suction chamber are all arc lines, and the arc lines are tangent to the outer wall of the volute.
3. The vertical double suction pump of suction chamber hydraulic configuration as claimed in claim 1, characterized in that: the pump cover and the pump body are positioned in a matching way through a spigot and are sealed by an O-shaped ring.
4. The vertical double suction pump of suction chamber hydraulic structure according to claim 1, characterized in that: the pump cover is matched with the support through a stop opening, and the pump body, the pump cover and the motor are connected and fastened through the stud, the nut and the gasket.
5. The vertical double suction pump of suction chamber hydraulic configuration as claimed in claim 1, characterized in that: the support is matched with a stop opening of the motor and is fastened through a bolt and nut assembly, and an operation window is arranged on the motor support.
6. The vertical double suction pump of suction chamber hydraulic configuration as claimed in claim 1, characterized in that: the pump shaft and the shaft coupling, and the pump shaft and the impeller are connected in a key transmission manner; the mechanical seal is arranged on the end face of the outer side of the pump cover.
7. The vertical double suction pump of suction chamber hydraulic configuration as claimed in claim 1, characterized in that: the impeller is fixed on the pump body through an impeller locking nut.
8. A design method of a vertical double suction pump of a suction chamber hydraulic structure is characterized in that: the design method comprises the following steps:
the first step is as follows: determining the suction chamber inlet diameter:
suction chamber inlet diameter Ds = 1.1-1.3D j The flow speed of the suction inlet is ensured to be 2.5-3.5m/s; wherein D j Is the impeller inlet diameter;
the second step is that: the change rule of the area of the inlet channel of the suction chamber is as follows:
the flow area is uniformly increased from the inlet to the throat; the area of the quasi-spiral contraction section is uniformly reduced; wherein S A-A ＝1.2～1.4S 0-0 ；S A-A Is the area of the maximum, S 0-0 Is the area where the minimum is located,
the third step: calculating the section area of the suction chamber:
the double suction pump water inlet flow passage is symmetrically divided into two parts near the volute, when the liquid flows through the section of the water suction chamber, a part of the liquid enters the impeller, the area of the section is divided into four sections from large to small, and the average flow speed of the liquid on each section is V = 0.7-0.85V j Calculation of where V j Is the impeller inlet flow rate;
half the flow passes through the maximum cross section in the half-spiral shape, and since the suction is completely symmetrical, the area of the section B is:
wherein Q is the pump flow;
the other cross-sectional areas are reduced in proportion to the maximum area:
the fourth step: the shape of a flow passage from a pump inlet to the quasi-spiral part is designed, all cross sections are connected smoothly, and the shape and the area of the cross section are adjusted, so that the area from the cross section at the minimum position to the cross section at the maximum position is increased uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210751852.9A CN115388010A (en) | 2022-06-28 | 2022-06-28 | Vertical double-suction pump with suction chamber hydraulic structure and design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210751852.9A CN115388010A (en) | 2022-06-28 | 2022-06-28 | Vertical double-suction pump with suction chamber hydraulic structure and design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115388010A true CN115388010A (en) | 2022-11-25 |
Family
ID=84117704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210751852.9A Pending CN115388010A (en) | 2022-06-28 | 2022-06-28 | Vertical double-suction pump with suction chamber hydraulic structure and design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115388010A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594454A (en) * | 2020-05-21 | 2020-08-28 | 上海凯泉泵业（集团）有限公司 | Vertical double entry pump of direct-connected type |
| CN113294347A (en) * | 2021-06-30 | 2021-08-24 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump and design method thereof |
-
2022
- 2022-06-28 CN CN202210751852.9A patent/CN115388010A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594454A (en) * | 2020-05-21 | 2020-08-28 | 上海凯泉泵业（集团）有限公司 | Vertical double entry pump of direct-connected type |
| CN111594454B (en) * | 2020-05-21 | 2024-05-17 | 上海凯泉泵业（集团）有限公司 | Direct-connection vertical double-suction pump |
| CN113294347A (en) * | 2021-06-30 | 2021-08-24 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump and design method thereof |
| CN113294347B (en) * | 2021-06-30 | 2024-05-17 | 上海凯泉泵业（集团）有限公司 | Vertical double-suction pump and design method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115388010A (en) | Vertical double-suction pump with suction chamber hydraulic structure and design method | |
| CN108775287A (en) | Self priming centrifugal pump | |
| WO2007073633A1 (en) | An improved jet well pump | |
| CN209990691U (en) | End suction type direct connection double-suction pump | |
| CN101303027A (en) | Vertical type multilevel barrel bag pump | |
| CN217682289U (en) | Vertical double-suction pump with suction chamber hydraulic structure | |
| CN102182706B (en) | S-shaped downwards horizontal axis-extending tubular pump device | |
| CN113294347B (en) | Vertical double-suction pump and design method thereof | |
| CN105805046A (en) | Device for improving internal flow stability of diagonal flow pump | |
| CN216975258U (en) | Vertical double-suction pump | |
| CN107120314A (en) | Axle envelope formula core main pump pumping chamber | |
| CN206957988U (en) | Axle envelope formula core main pump pumping chamber | |
| CN108661918B (en) | Sealed self-priming centrifugal pump | |
| CN210087613U (en) | Vertical sectional type long shaft pump | |
| CN213331550U (en) | Novel round platform shaft type tubular pump device | |
| CN212376980U (en) | Anti-cavitation structure of vertical centrifugal pump | |
| CN213451033U (en) | Preposition device for improving cavitation performance of water pump | |
| CN219639069U (en) | Axial flow pump beneficial to water flow diffusion | |
| CN220204200U (en) | Eliminate horizontal high-speed centrifugal pump entry backward flow structure | |
| CN216518813U (en) | Vertical diagonal flow pump impeller and vertical diagonal flow pump | |
| CN210637253U (en) | Vertical pipeline desulfurization pump | |
| CN214464917U (en) | Multistage pump with guide vane wheel | |
| CN212479696U (en) | High-efficiency energy-saving multistage middle-open double-suction pump | |
| CN210068568U (en) | Water inlet structure based on application of high-efficiency single-stage double-suction horizontal split pump | |
| CN220828369U (en) | Water pump outlet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |